/* roulang page: index */
:root {
    --bg: #0B0F14;
    --bg-soft: #0E141A;
    --panel: #111820;
    --panel-2: #131A21;
    --card: #151C25;
    --card-hover: #1A232C;
    --line: rgba(255,255,255,0.08);
    --line-strong: rgba(255,255,255,0.16);
    --text: #EDF2F7;
    --muted: #9BAAB8;
    --muted-2: #6F7E8B;
    --primary: #3DDC97;
    --primary-ink: #06231A;
    --primary-soft: rgba(61, 220, 151, 0.13);
    --accent: #F4B56A;
    --danger: #E5535B;
    --r-lg: 14px;
    --r-md: 10px;
    --r-sm: 6px;
    --shadow-hover: 0 18px 45px rgba(0, 0, 0, 0.42);
    --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}
* {
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
body.modal-open {
    overflow: hidden;
}
a {
    color: inherit;
    text-decoration: none;
    transition: color .2s var(--ease);
}
a:hover {
    color: var(--primary);
}
img {
    max-width: 100%;
    display: block;
}
button,
input {
    font-family: inherit;
}
.container {
    max-width: 1320px;
    padding-left: 24px;
    padding-right: 24px;
}
.section {
    padding-top: clamp(70px, 9vw, 118px);
    padding-bottom: clamp(70px, 9vw, 118px);
}
.section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 42px;
    position: relative;
    z-index: 2;
}
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: .16em;
    color: var(--primary);
    text-transform: uppercase;
    background: var(--primary-soft);
    border: 1px solid rgba(61, 220, 151, .18);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 18px;
}
.eyebrow i {
    font-size: 12px;
    color: var(--primary);
}
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--text);
    line-height: 1.24;
    margin-top: 0;
    margin-bottom: .5em;
}
h1 {
    font-size: clamp(2.5rem, 6vw, 4.6rem);
    font-weight: 800;
    line-height: 1.06;
    letter-spacing: -0.02em;
    margin-bottom: .35em;
}
h2 {
    font-size: clamp(1.9rem, 3.6vw, 2.9rem);
    font-weight: 800;
    letter-spacing: -0.015em;
    margin-bottom: 8px;
}
h3 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}
h1 .text-primary,
h2 .text-primary {
    color: var(--primary) !important;
}
.lead-text {
    color: var(--muted);
    font-size: 1.06rem;
    max-width: 720px;
}
.section-subtitle {
    color: var(--muted);
    font-size: 1rem;
    max-width: 680px;
    margin-top: 10px;
    margin-bottom: 0;
}
.text-accent {
    color: var(--accent) !important;
}
.bg-panel {
    background: var(--panel);
}

/* ===== Buttons ===== */
.btn {
    --bs-btn-border-radius: var(--r-sm);
    font-weight: 700;
    font-size: 15px;
    padding: 10px 22px;
    letter-spacing: .02em;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all .2s var(--ease);
}
.btn-primary-custom {
    background: var(--primary);
    color: var(--primary-ink);
    border: 1px solid var(--primary);
}
.btn-primary-custom:hover,
.btn-primary-custom:focus {
    background: #58e6aa;
    border-color: #58e6aa;
    color: var(--primary-ink);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(61, 220, 151, .2);
}
.btn-outline-custom {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, .55);
}
.btn-outline-custom:hover,
.btn-outline-custom:focus {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(61, 220, 151, .06);
    transform: translateY(-2px);
}
.btn:focus-visible,
.form-control:focus-visible,
.form-select:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    box-shadow: none;
}
.btn-lg-custom {
    padding: 13px 28px;
    font-size: 16px;
    border-radius: 8px;
}

/* ===== Top bar ===== */
.site-topbar {
    background: #070A0E;
    border-bottom: 1px solid rgba(255, 255, 255, .05);
    font-size: 12px;
    color: #8496a4;
    min-height: 34px;
}
.site-topbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 34px;
    padding-top: 4px;
    padding-bottom: 4px;
}
.topbar-inner {
    display: flex;
    align-items: center;
    width: 100%;
    gap: 14px;
}
.topbar-inner a {
    color: #8496a4;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.topbar-inner a:hover {
    color: var(--primary);
}
.topbar-right {
    margin-left: auto;
    display: flex;
    gap: 20px;
    align-items: center;
}
.topbar-domain {
    letter-spacing: .05em;
    color: #9fb3c2;
    font-weight: 500;
}
.topbar-phone i {
    color: var(--primary);
}
@media (max-width: 767px) {
    .topbar-right {
        display: none;
    }
}

/* ===== Navbar ===== */
.site-navbar {
    position: relative;
    z-index: 1040;
    background: rgba(9, 12, 16, .82);
    border-bottom: 1px solid rgba(255, 255, 255, .05);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: background .25s ease, box-shadow .25s ease;
    min-height: 72px;
}
.site-navbar .nav-link {
    color: #C9D4DC;
    font-weight: 500;
    font-size: 15px;
    padding: .5rem 0;
    white-space: nowrap;
    margin-right: 26px;
    position: relative;
    border-bottom: 2px solid transparent;
    transition: color .2s ease;
}
.site-navbar .nav-link:last-child {
    margin-right: 0;
}
.site-navbar .nav-link:hover,
.site-navbar .nav-link.active {
    color: #fff;
}
.site-navbar .nav-link.active::after {
    content: "";
    display: block;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
}
.site-navbar .nav-link:hover::after {
    content: "";
    display: block;
    height: 2px;
    border-radius: 2px;
    background: rgba(61, 220, 151, .5);
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
}
.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-right: 34px;
    transition: transform .2s ease;
}
.brand-logo:hover {
    transform: translateY(-1px);
}
.logo-badge {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary);
    color: var(--primary-ink);
    font-weight: 900;
    font-size: 15px;
    letter-spacing: -0.04em;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: "Segoe UI", system-ui, sans-serif;
    box-shadow: 0 0 0 4px rgba(61, 220, 151, .12);
}
.logo-text {
    font-size: 19px;
    font-weight: 800;
    letter-spacing: .01em;
    color: var(--text);
}
.logo-text b {
    color: var(--primary);
    font-weight: 800;
}
.navbar-nav-wrapper {
    margin-left: auto;
}
.nav-cta {
    display: inline-flex;
    padding: 9px 18px;
    border-radius: 999px;
    background: var(--primary);
    color: var(--primary-ink);
    font-size: 14px;
    font-weight: 700;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    transition: all .2s var(--ease);
}
.nav-cta:hover {
    background: #fff;
    color: var(--primary-ink);
    box-shadow: 0 8px 26px rgba(237, 242, 247, .12);
}
.navbar-toggler {
    border: 1px solid rgba(255, 255, 255, .28);
    background: transparent;
    border-radius: 8px;
    width: 44px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.navbar-toggler i {
    color: #fff;
    font-size: 18px;
}
@media (max-width: 991px) {
    .navbar-nav-wrapper {
        margin-left: 0;
        margin-top: 12px;
    }
    .site-navbar .nav-link {
        padding: 10px 0;
        margin-right: 0;
        border-bottom: 0;
    }
    .site-navbar .nav-link.active::after {
        display: none;
    }
    .site-navbar .nav-link.active {
        color: var(--primary);
    }
    .navbar-collapse {
        background: #10161c;
        padding: 16px 16px 20px;
        border-radius: 0 0 14px 14px;
        border: 1px solid var(--line);
        margin-top: 12px;
    }
    .navbar-collapse .nav-cta {
        margin-top: 15px;
    }
}

/* ===== Hero ===== */
.home-hero {
    min-height: 92vh;
    display: flex;
    align-items: center;
    position: relative;
    background: var(--bg);
    padding: 80px 0 120px;
    overflow: hidden;
}
.hero-media {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .45;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(75deg, rgba(6, 8, 11, .98) 0%, rgba(7, 10, 14, .88) 36%, rgba(8, 11, 15, .38) 86%);
    z-index: 1;
}
.hero-overlay::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 240px;
    background: linear-gradient(180deg, transparent, var(--bg));
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
}
.hero-tagline {
    margin-bottom: 26px;
}
.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px 22px;
    margin-top: 30px;
    font-size: .9rem;
    color: #B9C6D0;
    letter-spacing: .01em;
}
.hero-meta span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.hero-meta i {
    width: 16px;
    text-align: center;
    color: var(--primary);
}
.hero-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 40px;
}
.hero-scroll {
    position: absolute;
    right: 22px;
    bottom: 118px;
    z-index: 3;
    writing-mode: vertical-rl;
    font-size: 12px;
    letter-spacing: .18em;
    color: var(--muted);
    gap: 10px;
    display: flex;
    align-items: center;
}
.hero-scroll i {
    transform: rotate(90deg);
    display: inline-block;
    animation: herodown 1.8s infinite ease-in-out;
}
@keyframes herodown {
    0%, 100% {
        transform: rotate(90deg) translateX(-3px);
        opacity: .4;
    }
    50% {
        transform: rotate(90deg) translateX(4px);
        opacity: 1;
    }
}
@media (max-width: 767px) {
    .hero-scroll {
        display: none;
    }
    .home-hero {
        padding: 64px 0 100px;
    }
}

/* ===== Horizontal cards ===== */
.slide-row {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 18px;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, .25) transparent;
}
.slide-row::-webkit-scrollbar {
    height: 6px;
}
.slide-row::-webkit-scrollbar-track {
    background: transparent;
}
.slide-row::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, .18);
    border-radius: 99px;
}
.slide-col {
    flex: 0 0 360px;
    scroll-snap-align: start;
    max-width: 85vw;
}
.scroll-arrow {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .2);
    background: rgba(255, 255, 255, .04);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all .2s;
}
.scroll-arrow:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--primary-ink);
}
@media (max-width: 520px) {
    .slide-col {
        flex-basis: 300px;
    }
}

/* ===== Card ===== */
.poster-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: transform .22s var(--ease), border-color .2s ease, box-shadow .22s ease;
    position: relative;
    height: 100%;
}
.poster-card:hover {
    transform: translateY(-5px);
    border-color: rgba(61, 220, 151, .35);
    box-shadow: var(--shadow-hover);
}
.poster-media {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #101821;
}
.poster-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .45s var(--ease);
}
.poster-card:hover .poster-media img {
    transform: scale(1.03);
}
.poster-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, .72));
}
.poster-media .play-icon {
    position: absolute;
    left: 18px;
    bottom: 16px;
    z-index: 2;
    width: 38px;
    height: 38px;
    border-radius: 999px;
    background: rgba(61, 220, 151, .9);
    color: var(--primary-ink);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    border: 2px solid rgba(255, 255, 255, .2);
}
.poster-body {
    padding: 18px 20px 22px;
}
.poster-tag {
    display: inline-block;
    margin-bottom: 10px;
    background: rgba(61, 220, 151, .12);
    border: 1px solid rgba(61, 220, 151, .2);
    color: var(--primary);
    border-radius: 999px;
    font-size: 12px;
    padding: 3px 12px;
    font-weight: 600;
    letter-spacing: .06em;
}
.poster-title {
    font-size: 19px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 53px;
}
.poster-desc {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 15px;
}
.poster-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
    color: var(--muted-2);
}
.post-link {
    color: var(--muted);
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.post-link i {
    font-size: 12px;
}
.post-link:hover {
    color: var(--primary);
}

/* ===== Hot area ===== */
.hot-grid {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 22px;
}
.hot-grid.main-card {
    grid-column: 1 / -1;
}
.hot-grid .hot-subcard {
    display: flex;
    flex-direction: column;
}
.hot-card {
    position: relative;
    border-radius: var(--r-lg);
    overflow: hidden;
    background: var(--card);
    min-height: 280px;
    border: 1px solid var(--line);
    transition: all .22s var(--ease);
    display: flex;
}
.hot-card:hover {
    transform: translateY(-4px);
    border-color: rgba(61, 220, 151, .3);
    box-shadow: var(--shadow-hover);
}
.hot-card.hero-card {
    min-height: 360px;
}
.hot-card.square-card {
    min-height: 340px;
}
.hot-media {
    overflow: hidden;
    flex: 1;
    position: relative;
}
.hot-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s var(--ease);
}
.hot-card:hover .hot-media img {
    transform: scale(1.02);
}
.hot-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(7, 10, 14, .88) 30%, rgba(7, 9, 13, .24) 75%);
}
.hot-content {
    position: absolute;
    z-index: 3;
    left: 0;
    top: 0;
    bottom: 0;
    max-width: 560px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px 32px;
}
.hot-order {
    position: absolute;
    top: 24px;
    right: 28px;
    z-index: 4;
    font-size: clamp(3rem, 5vw, 4.6rem);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.04em;
    color: var(--accent);
    opacity: .78;
    font-family: "Segoe UI", system-ui, sans-serif;
}
.hot-content.panel-style {
    background: var(--panel-2);
    border: 1px solid var(--line);
}
.media-tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}
.media-tag {
    background: rgba(255, 255, 255, .1);
    border: 1px solid rgba(255, 255, 255, .16);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 999px;
    color: var(--text);
    letter-spacing: .03em;
}
.badge-hot {
    background: var(--accent);
    color: #2D2417;
    font-size: 12px;
    font-weight: 800;
    border-radius: 6px;
    padding: 3px 9px;
    letter-spacing: .05em;
}
.hot-title {
    font-size: 24px;
    font-weight: 800;
    line-height: 1.32;
    color: #fff;
}
.hot-excerpt {
    color: rgba(237, 242, 247, .78);
    font-size: 14px;
    margin-top: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.hot-excerpt .list-dot {
    display: flex;
    align-items: center;
    gap: 8px;
}
.hot-excerpt i {
    color: var(--primary);
    max-width: 14px;
}
.hot-link {
    margin-top: 16px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    align-self: flex-start;
}
.hot-link:hover {
    gap: 11px;
}
@media (max-width: 991px) {
    .hot-grid {
        grid-template-columns: 1fr;
    }
    .hot-card {
        min-height: 260px;
    }
    .hot-content {
        max-width: 100%;
        padding: 20px 20px 24px;
    }
}
@media (max-width: 600px) {
    .hot-title {
        font-size: 20px;
    }
    .hot-order {
        top: 14px;
        right: 16px;
        font-size: 3rem;
    }
    .hot-card.hero-card,
    .hot-card.square-card {
        min-height: 310px;
    }
}

/* ===== Row list ===== */
.tab-shell {
    border-bottom: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 26px;
}
.tab-pill {
    background: transparent;
    border: 0;
    border-radius: 999px;
    color: var(--muted);
    padding: 9px 19px;
    font-size: 14px;
    font-weight: 600;
    margin-right: 8px;
    transition: all .2s;
    border: 1px solid transparent;
}
.tab-pill:hover {
    color: #fff;
}
.tab-pill.active {
    color: var(--primary-ink);
    background: var(--primary);
    border-color: var(--primary);
}
.line-list {
    border-top: 1px solid var(--line);
}
.line-item {
    display: grid;
    grid-template-columns: 68px 1fr 3fr 150px 34px;
    align-items: center;
    gap: 18px;
    padding: 22px 8px;
    border-bottom: 1px solid var(--line);
    transition: background .2s;
    position: relative;
}
.line-item:hover {
    background: rgba(255, 255, 255, .025);
}
.line-index {
    font-size: 13px;
    color: var(--muted-2);
    font-family: "Consolas", monospace;
    letter-spacing: .04em;
}
.line-cat {
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
}
.line-title {
    font-weight: 700;
    font-size: 17px;
    transition: color .2s;
}
.line-item:hover .line-title {
    color: var(--primary);
}
.line-desc {
    color: var(--muted);
    font-size: 14px;
    line-height: 1.6;
}
.line-arrow {
    color: var(--muted);
    text-align: center;
    opacity: .6;
    transition: all .2s;
}
.line-item:hover .line-arrow {
    color: var(--primary);
    opacity: 1;
    transform: translateX(4px);
}
@media (max-width: 767px) {
    .line-item {
        grid-template-columns: 40px 1fr 34px;
        grid-template-areas: "idx title arrow" "idx desc arrow" "cat cat arrow";
        gap: 5px 10px;
        padding: 17px 4px;
    }
    .line-index {
        grid-area: idx;
    }
    .line-title {
        grid-area: title;
    }
    .line-desc {
        grid-area: desc;
        font-size: 13px;
        display: block;
    }
    .line-cat {
        grid-area: cat;
        font-size: 12px;
        opacity: .8;
    }
    .line-arrow {
        grid-area: arrow;
    }
}

/* ===== CMS card list ===== */
.cms-list .line-title {
    font-size: 18px;
}
.cms-tag {
    background: var(--primary-soft);
    color: var(--primary);
    display: inline-flex;
    border-radius: 99px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
}
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 64px 20px;
    background: rgba(255, 255, 255, .02);
    border: 1px dashed rgba(255, 255, 255, .14);
    border-radius: 16px;
    color: var(--muted);
    text-align: center;
}
.empty-state i {
    font-size: 32px;
    color: rgba(255, 255, 255, .3);
}
.empty-state p {
    margin: 0;
    font-size: 15px;
}

/* ===== CTA form panel ===== */
.cta-panel {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    background: #0D1218;
    border: 1px solid rgba(255, 255, 255, .08);
    padding: 0;
}
.cta-bg {
    position: absolute;
    inset: 0;
    background-position: center;
    background-size: cover;
}
.cta-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, #0B0F14 26%, rgba(10, 13, 17, .76) 70%);
}
.cta-content {
    position: relative;
    z-index: 2;
    padding: clamp(38px, 6vw, 70px);
    max-width: 660px;
}
.cta-form .form-group {
    flex: 1;
}
.cta-form .form-control {
    background: var(--bg-soft);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 8px;
    min-height: 50px;
    color: var(--text);
    padding: 10px 16px;
}
.cta-form .form-control:focus {
    background: var(--bg);
}
.form-hint {
    color: var(--muted-2);
    font-size: 12px;
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}
@media (max-width: 540px) {
    .cta-form {
        flex-direction: column;
    }
    .cta-form .btn {
        width: 100%;
    }
}

/* ===== FAQ (accordion) ===== */
.faq-shell {
    border-top: 1px solid var(--line);
}
.faq-item {
    border-bottom: 1px solid var(--line);
    border-radius: 0 !important;
    background: transparent !important;
    padding: 0;
}
.accordion-button {
    background: transparent !important;
    color: #fff;
    padding: 22px 12px 22px 4px;
    font-weight: 700;
    font-size: 16px;
    box-shadow: none !important;
    border-left: 3px solid transparent;
}
.accordion-button:not(.collapsed) {
    color: var(--primary);
}
.accordion-button:focus {
    box-shadow: inset 0 0 0 1px rgba(61, 220, 151, .35);
}
.accordion-item {
    background: transparent;
    border: 0;
}
.accordion-button::after {
    background-image: none;
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    content: "\f078";
    transform: none;
    font-size: 14px;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    transition: transform .25s ease;
}
.accordion-button:not(.collapsed)::after {
    color: var(--primary);
    transform: rotate(180deg);
}
.accordion-body {
    color: var(--muted);
    background: rgba(255, 255, 255, .015);
    border-left: 2px solid rgba(61, 220, 151, .25);
    margin-left: 4px;
    padding: 10px 18px 22px 18px;
    border-radius: 0 0 8px 8px;
    line-height: 1.8;
    font-size: 15px;
}

/* ===== Feature grid (index) ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.feature-card {
    padding: 26px 22px;
    border: 1px solid var(--line);
    background: var(--panel);
    border-radius: 12px;
    transition: all .2s var(--ease);
}
.feature-card:hover {
    background: var(--card-hover);
    border-color: rgba(61, 220, 151, .3);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}
.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 19px;
    margin-bottom: 16px;
}
.feature-card h4 {
    font-size: 17px;
}
.feature-card p {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 14px;
    line-height: 1.7;
}
.feature-more {
    font-size: 13px;
    font-weight: 700;
    color: var(--muted-2);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.feature-card:hover .feature-more {
    color: var(--primary);
    gap: 9px;
}
@media (max-width: 991px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 600px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Footer ===== */
.site-footer {
    background: #080B0F;
    border-top: 1px solid var(--line);
    color: var(--muted);
    padding-top: 72px;
}
.footer-logo {
    margin-bottom: 16px;
}
.footer-brand-desc {
    color: #82919f;
    font-size: 14px;
    max-width: 300px;
    line-height: 1.85;
    margin-bottom: 20px;
}
.footer-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: .02em;
}
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    font-size: 14px;
    color: #82919f;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.footer-links a:hover {
    color: var(--primary);
    transform: translateX(2px);
}
.footer-contact-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.footer-contact-list li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-bottom: 13px;
    font-size: 14px;
}
.footer-contact-list i {
    color: var(--primary);
    margin-top: 5px;
    min-width: 15px;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .06);
    padding: 24px 0;
    margin-top: 58px;
    font-size: 13px;
    color: #60707c;
}
.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}
.footer-bottom a {
    color: #8496a4;
}
.footer-bottom a:hover {
    color: var(--primary);
}
.footer-legal span {
    color: #53636F;
}

/* ===== category page ===== */
.category-banner {
    min-height: 380px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 100px;
}
.category-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(9, 13, 18, .97) 40%, rgba(9, 12, 16, .58) 90%);
}
.breadcrumb {
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
    --bs-breadcrumb-divider-color: #60707c;
}
.breadcrumb a {
    color: #798896;
}
.breadcrumb a:hover {
    color: var(--primary);
}
.breadcrumb .active {
    color: var(--primary);
}
.category-banner .container {
    position: relative;
    z-index: 2;
}

/* ===== newsletter cards ===== */
.newsletter-card {
    display: flex;
    flex-direction: column;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    padding: 20px 22px;
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 18px;
    transition: all .2s;
}
.newsletter-card:hover {
    border-color: rgba(61, 220, 151, .25);
    background: var(--card);
    color: var(--muted);
}

/* ===== Mood variety ===== */
.chips {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: .78rem;
    color: var(--muted);
    background: rgba(255, 255, 255, .03);
    border: 1px solid rgba(255, 255, 255, .07);
    padding: 6px 12px;
    border-radius: 99px;
    white-space: nowrap;
}
.chips i {
    font-size: .62rem;
    color: var(--primary);
}
@media (max-width: 520px) {
    h1 {
        font-size: 34px;
    }
    .hero-meta {
        flex-direction: column;
        gap: 8px;
    }
}
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    .slide-row {
        scroll-snap-type: none;
    }
}

.tab-pane-custom {
    display: none;
}
.tab-pane-custom.active {
    display: block;
    animation: tabFade .25s var(--ease);
}
@keyframes tabFade {
    from { opacity: 0; transform: translateY(5px); }
    to   { opacity: 1; transform: translateY(0); }
}
.site-navbar.shadow-sm {
    background: rgba(6, 8, 11, .94);
    box-shadow: 0 12px 30px rgba(0, 0, 0, .35) !important;
    border-bottom-color: transparent;
}

/* roulang page: category1 */
:root {
            --bg-primary: #0B0F14;
            --bg-panel: #131A21;
            --bg-card-hover: #1A232C;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.16);
            --text-primary: #EDF2F7;
            --text-secondary: #9BAAB8;
            --accent-primary: #3DDC97;
            --on-primary: #06231A;
            --accent-warm: #F4B56A;
            --radius-lg: 12px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.4);
            --transition: 200ms cubic-bezier(0.2, 0.7, 0.3, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 1rem;
        }
        body.modal-open {
            overflow: hidden;
        }
        img {
            max-width: 100%;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        button {
            border: none;
            background: none;
        }
        input,
        textarea {
            border: none;
            outline: none;
        }
        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .text-secondary-custom {
            color: var(--text-secondary);
        }
        .text-accent {
            color: var(--accent-primary);
        }
        .text-warm {
            color: var(--accent-warm);
        }
        .bg-panel-custom {
            background-color: var(--bg-panel);
        }
        .section-padding {
            padding: clamp(64px, 10vw, 120px) 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            color: var(--accent-primary);
            margin-bottom: 16px;
        }
        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--accent-primary);
            border-radius: 2px;
        }
        .section-title {
            font-size: clamp(1.75rem, 3.2vw, 2.75rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .section-subtitle {
            color: var(--text-secondary);
            max-width: 720px;
            font-size: 1rem;
            line-height: 1.75;
        }
        .badge-line {
            display: inline-block;
            background: rgba(61, 220, 151, 0.12);
            border: 1px solid rgba(61, 220, 151, 0.25);
            color: var(--accent-primary);
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .badge-warm {
            background: rgba(244, 181, 106, 0.12);
            border: 1px solid rgba(244, 181, 106, 0.25);
            color: var(--accent-warm);
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        /* ===== Header ===== */
        .site-header {
            position: relative;
            z-index: 100;
        }
        .site-topbar {
            background: #070A0E;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 12px;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
            line-height: 1.4;
        }
        .site-topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            min-height: 36px;
            gap: 16px;
            padding-top: 4px;
            padding-bottom: 4px;
        }
        .topbar-domain {
            color: rgba(255, 255, 255, 0.55);
            font-weight: 500;
            letter-spacing: 0.06em;
        }
        .topbar-right a {
            color: var(--text-secondary);
            font-size: 12px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition);
        }
        .topbar-right a:hover {
            color: var(--accent-primary);
        }
        .topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            gap: 16px;
        }
        @media (max-width: 767px) {
            .site-topbar .topbar-inner {
                justify-content: center;
            }
            .topbar-right {
                display: none;
            }
        }
        .site-navbar {
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-subtle);
            padding-top: 8px;
            padding-bottom: 8px;
            position: sticky;
            top: 0;
            z-index: 99;
        }
        .site-navbar.scrolled {
            background: rgba(11, 15, 20, 0.88);
            backdrop-filter: blur(12px);
            border-bottom-color: rgba(255, 255, 255, 0.04);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-badge {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-primary), #2BB582);
            color: var(--on-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            font-weight: 800;
            letter-spacing: -0.05em;
            text-transform: uppercase;
            box-shadow: 0 6px 18px rgba(61, 220, 151, 0.25);
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 600;
            line-height: 1.2;
            color: #fff;
            letter-spacing: 0.02em;
        }
        .logo-text b {
            font-weight: 800;
            color: var(--accent-primary);
        }
        .navbar {
            align-items: center;
        }
        .navbar-toggler {
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px 8px;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            width: auto;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            border-color: var(--accent-primary);
        }
        .navbar-collapse {
            background: var(--bg-primary);
        }
        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: #0E141A;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                padding: 16px 0 20px;
                margin-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.05);
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                position: absolute;
                left: -24px;
                right: -24px;
                top: 100%;
                padding-left: 24px;
                padding-right: 24px;
            }
        }
        .navbar-nav {
            display: flex;
            gap: 8px;
        }
        .nav-item {
            list-style: none;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 14px !important;
            border-radius: var(--radius-sm);
            position: relative;
            transition: all var(--transition);
            letter-spacing: 0.02em;
        }
        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.03);
        }
        .nav-link.active {
            color: var(--accent-primary) !important;
            background: rgba(61, 220, 151, 0.1);
        }
        .nav-link.active::after {
            content: '';
            display: block;
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent-primary);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-primary);
            color: var(--on-primary);
            font-weight: 700;
            font-size: 14px;
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            margin-left: auto;
            white-space: nowrap;
        }
        .nav-cta:hover {
            filter: brightness(1.08);
            transform: translateY(-1px);
            color: var(--on-primary);
        }
        @media (max-width: 991.98px) {
            .navbar-nav {
                flex-direction: column;
                gap: 0;
                margin-bottom: 14px;
            }
            .nav-link.active::after {
                left: 16px;
                width: 24px;
                right: auto;
            }
            .nav-cta {
                margin-left: 0;
                justify-content: center;
                width: 100%;
            }
            .navbar-nav-wrapper {
                display: flex;
                flex-direction: column;
            }
        }
        /* ===== Page Hero ===== */
        .category-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            padding: 70px 0;
            background: linear-gradient(135deg, #0B0F14 0%, #101820 60%, #0F1F26 100%);
            border-bottom: 1px solid var(--border-subtle);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center top;
            opacity: 0.22;
            clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 180px;
            background: linear-gradient(180deg, transparent, var(--bg-primary));
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            background: rgba(11, 15, 20, 0.6);
            border-radius: 999px;
            padding: 6px 18px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            margin-bottom: 24px;
        }
        .hero-breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .hero-breadcrumb a:hover {
            color: var(--accent-primary);
        }
        .hero-breadcrumb .separator {
            opacity: 0.5;
            color: #556070;
        }
        .category-hero h1 {
            font-size: clamp(2rem, 4.2vw, 3.6rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            max-width: 700px;
        }
        .category-hero h1 .highlight {
            color: var(--accent-primary);
        }
        .category-hero .hero-desc {
            color: var(--text-secondary);
            max-width: 600px;
            font-size: 1.05rem;
            line-height: 1.85;
            margin-bottom: 28px;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        /* ===== CTA Buttons ===== */
        .btn-custom-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-primary);
            color: var(--on-primary);
            font-weight: 700;
            font-size: 15px;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-custom-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(61, 220, 151, 0.25);
            color: var(--on-primary);
        }
        .btn-custom-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.35);
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-custom-outline:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
            transform: translateY(-2px);
        }
        .btn:focus-visible,
        .btn-custom-primary:focus-visible,
        .btn-custom-outline:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 3px;
        }
        /* ===== Intro Overview ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: clamp(32px, 5vw, 72px);
            align-items: center;
        }
        @media (max-width: 768px) {
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }
        .overview-text .lead-text {
            font-size: 1.2rem;
            line-height: 1.8;
            color: var(--text-primary);
            margin-bottom: 24px;
            border-left: 3px solid var(--accent-primary);
            padding-left: 20px;
        }
        .overview-text p {
            color: var(--text-secondary);
            margin-bottom: 18px;
        }
        .overview-list {
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
        }
        .overview-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .overview-list li i {
            color: var(--accent-primary);
            margin-top: 5px;
            font-size: 14px;
        }
        .stats-card {
            background: var(--bg-panel);
            border-radius: var(--radius-lg);
            padding: 36px;
            border: 1px solid var(--border-subtle);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        @media (max-width: 420px) {
            .stats-card {
                grid-template-columns: 1fr;
                padding: 28px;
            }
        }
        .stat-item {
            text-align: left;
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-primary);
            line-height: 1.3;
            font-family: "Archivo", "Inter", system-ui, sans-serif;
        }
        .stat-item:nth-child(even) .stat-number {
            color: var(--accent-warm);
        }
        .stat-label {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-top: 6px;
            line-height: 1.5;
        }
        /* ===== Methodology ===== */
        .methodology-section {
            position: relative;
            background: linear-gradient(180deg, var(--bg-primary) 0%, #0D1318 50%, var(--bg-primary) 100%);
        }
        .method-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 48px;
        }
        @media (max-width: 991px) {
            .method-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .method-cards {
                grid-template-columns: 1fr;
            }
        }
        .method-card {
            background: var(--bg-panel);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            padding: 28px 24px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .method-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--accent-primary);
            border-radius: 0 4px 4px 0;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .method-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 220, 151, 0.2);
        }
        .method-card:hover::before {
            opacity: 1;
        }
        .method-num {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent-warm);
            letter-spacing: 0.12em;
            margin-bottom: 14px;
            display: block;
        }
        .method-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .method-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        /* ===== Topic Cards ===== */
        .topic-section {
            background: var(--bg-primary);
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 44px;
        }
        @media (max-width: 768px) {
            .topic-grid {
                grid-template-columns: 1fr;
            }
        }
        .topic-card {
            background: var(--bg-panel);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
            transition: all var(--transition);
        }
        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 220, 151, 0.25);
        }
        .topic-card .topic-image {
            width: 100%;
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .topic-card .topic-image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60%;
            background: linear-gradient(180deg, transparent, rgba(19, 26, 33, 0.9));
        }
        .topic-card .topic-body {
            padding: 24px 26px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .topic-card .topic-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
            gap: 8px;
        }
        .topic-card .topic-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
            color: var(--text-primary);
        }
        .topic-card .topic-excerpt {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .topic-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-primary);
            font-size: 0.88rem;
            font-weight: 600;
            margin-top: 16px;
            transition: gap var(--transition), color var(--transition);
            background: transparent;
            border: none;
            padding: 0;
            cursor: pointer;
        }
        .topic-link:hover {
            gap: 14px;
            color: var(--text-primary);
        }
        /* ===== Scenario Section ===== */
        .scenario-section {
            background: #0D1319;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .scenario-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 48px;
        }
        @media (max-width: 768px) {
            .scenario-row {
                grid-template-columns: 1fr;
            }
        }
        .scenario-card {
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.07);
            padding: 30px 26px;
            background: rgba(255, 255, 255, 0.02);
            display: flex;
            gap: 18px;
            transition: all var(--transition);
            position: relative;
        }
        .scenario-card:hover {
            background: rgba(61, 220, 151, 0.05);
            border-color: rgba(61, 220, 151, 0.2);
            transform: translateY(-3px);
        }
        .scenario-icon {
            width: 46px;
            height: 46px;
            border-radius: 10px;
            background: rgba(61, 220, 151, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent-primary);
            flex-shrink: 0;
        }
        .scenario-content {
            flex: 1;
        }
        .scenario-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .scenario-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        /* ===== Content Check ===== */
        .checklist-section {
            background: var(--bg-primary);
        }
        .checklist-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: clamp(30px, 5vw, 60px);
            align-items: center;
            margin-top: 40px;
        }
        @media (max-width: 768px) {
            .checklist-layout {
                grid-template-columns: 1fr;
            }
        }
        .checklist-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .checklist-item:last-child {
            border-bottom: none;
        }
        .check-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(61, 220, 151, 0.15);
            color: var(--accent-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 12px;
            margin-top: 4px;
        }
        .checklist-content h5 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .checklist-content p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        .check-visual {
            background: var(--bg-panel);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 36px;
            position: relative;
            min-height: 300px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .check-visual .bar-chart {
            display: flex;
            align-items: flex-end;
            gap: 14px;
            height: 180px;
            margin-top: 24px;
        }
        .check-visual .bar {
            flex: 1;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 6px 6px 2px 2px;
            position: relative;
            transition: background var(--transition);
        }
        .check-visual .bar:nth-child(1) {
            height: 45%;
            background: linear-gradient(180deg, rgba(61, 220, 151, 0.7), rgba(61, 220, 151, 0.2));
        }
        .check-visual .bar:nth-child(2) {
            height: 62%;
            background: linear-gradient(180deg, rgba(61, 220, 151, 0.7), rgba(61, 220, 151, 0.2));
        }
        .check-visual .bar:nth-child(3) {
            height: 78%;
            background: linear-gradient(180deg, rgba(61, 220, 151, 0.7), rgba(61, 220, 151, 0.2));
        }
        .check-visual .bar:nth-child(4) {
            height: 92%;
            background: linear-gradient(180deg, #3DDC97, #237A58);
        }
        .check-visual .bar-label {
            position: absolute;
            bottom: -30px;
            left: 0;
            right: 0;
            text-align: center;
            font-size: 0.7rem;
            color: var(--text-secondary);
        }
        .check-visual-note {
            font-size: 0.82rem;
            color: var(--text-secondary);
            text-align: center;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 16px;
        }
        /* ===== FAQ ===== */
        .faq-section {
            background: #0D1319;
            border-top: 1px solid var(--border-subtle);
        }
        .faq-layout {
            display: grid;
            grid-template-columns: 0.75fr 1.25fr;
            gap: clamp(30px, 5vw, 64px);
            margin-top: 44px;
        }
        @media (max-width: 768px) {
            .faq-layout {
                grid-template-columns: 1fr;
            }
        }
        .faq-sidebar .faq-title {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .faq-sidebar p {
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .faq-contact-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-primary);
            font-weight: 600;
            font-size: 14px;
        }
        .faq-contact-btn:hover {
            gap: 12px;
            color: var(--text-primary);
        }
        .accordion {
            --bs-accordion-border-width: 0;
            --bs-accordion-bg: transparent;
            --bs-accordion-border-radius: 0;
        }
        .accordion-item {
            background: var(--bg-panel);
            border: 1px solid rgba(255, 255, 255, 0.06) !important;
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .accordion-item:focus-within {
            border-color: rgba(61, 220, 151, 0.4) !important;
        }
        .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-size: 1rem;
            padding: 22px 24px;
            font-weight: 600;
            box-shadow: none;
            border-left: 3px solid rgba(61, 220, 151, 0.3);
            transition: color var(--transition), background var(--transition);
        }
        .accordion-button::after {
            background-image: none;
            content: '+';
            font-family: "Archivo", sans-serif;
            font-size: 1.4rem;
            font-weight: 300;
            color: var(--accent-primary);
            width: auto;
            height: auto;
            line-height: 1;
            transition: transform 200ms ease;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(61, 220, 151, 0.05);
            color: var(--accent-primary);
            border-left-color: var(--accent-primary);
        }
        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }
        .accordion-button:focus {
            box-shadow: none;
        }
        .accordion-body {
            padding: 8px 24px 22px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
            background: transparent;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-left: 3px;
        }
        /* ===== CTA ===== */
        .cta-banner {
            background: linear-gradient(120deg, rgba(61, 220, 151, 0.12) 0%, rgba(11, 15, 20, 0.6) 50%),
                url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            border: 1px solid rgba(61, 220, 151, 0.2);
            position: relative;
            overflow: hidden;
        }
        @media (max-width: 520px) {
            .cta-banner {
                padding: 40px 20px;
            }
        }
        .cta-banner h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            max-width: 640px;
            margin: 0 auto 14px;
            line-height: 1.3;
        }
        .cta-banner p {
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto 28px;
            font-size: 1rem;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: #070A0E;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
            padding: 60px 0 0;
            margin-top: 30px;
        }
        .footer-logo {
            margin-bottom: 16px;
        }
        .footer-brand-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 340px;
            margin-bottom: 20px;
        }
        .chips {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }
        .chips i {
            color: var(--accent-primary);
            font-size: 0.7rem;
        }
        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-links a i {
            font-size: 0.7rem;
        }
        .footer-links a:hover {
            color: var(--accent-primary);
            padding-left: 4px;
        }
        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact-list li {
            display: flex;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 0.88rem;
            color: var(--text-secondary);
        }
        .footer-contact-list li i {
            color: var(--accent-primary);
            margin-top: 4px;
            flex-shrink: 0;
            font-size: 14px;
        }
        .footer-contact-list a {
            color: var(--text-primary);
        }
        .footer-contact-list a:hover {
            color: var(--accent-primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: 48px;
            text-align: center;
            padding: 20px 0;
            color: rgba(255, 255, 255, 0.42);
            font-size: 0.8rem;
            letter-spacing: 0.02em;
        }
        .footer-bottom .domain {
            color: var(--text-secondary);
            font-weight: 500;
        }
        @media (max-width: 767px) {
            .footer-bottom .d-inline {
                display: block;
            }
            .footer-brand-desc {
                max-width: 100%;
            }
            .category-hero {
                min-height: 340px;
                padding: 50px 0;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .stats-card {
                margin-top: 12px;
            }
        }
        /* Accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent-primary);
            outline-offset: 3px;
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: article */
:root {
            --site-bg: #0B0F14;
            --panel: #131A21;
            --panel-2: #1A232C;
            --border: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.16);
            --text: #EDF2F7;
            --muted: #9BAAB8;
            --primary: #3DDC97;
            --primary-deep: #06231A;
            --accent: #F4B56A;
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-full: 999px;
            --shadow-card: 0 18px 45px rgba(0, 0, 0, 0.35);
            --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
            --space-section: clamp(64px, 10vw, 120px);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            background: var(--site-bg);
            color: var(--text);
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            font-size: 1rem;
            line-height: 1.75;
            overflow-x: hidden;
            word-break: break-word;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s var(--ease);
        }

        a:hover {
            color: var(--primary);
        }

        button,
        input {
            font: inherit;
        }

        .container {
            max-width: 1280px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .container-narrow {
            max-width: 960px;
            margin: 0 auto;
        }

        .section-space {
            padding-top: var(--space-section);
            padding-bottom: var(--space-section);
        }

        .section-head {
            margin-bottom: 2.25rem;
        }

        .section-head h2 {
            font-size: clamp(1.75rem, 3.2vw, 2.6rem);
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 0.5rem;
        }

        .section-head p {
            color: var(--muted);
            max-width: 680px;
            margin-bottom: 0;
        }

        .btn {
            border-radius: 8px;
            font-weight: 600;
            padding: 0.65rem 1.4rem;
            border: 1px solid transparent;
            transition: all 0.2s var(--ease);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .btn-brand {
            background: var(--primary);
            color: var(--primary-deep) !important;
            border-color: var(--primary);
        }

        .btn-brand:hover {
            background: #68efb5;
            border-color: #68efb5;
            color: var(--primary-deep) !important;
            transform: translateY(-2px);
        }

        .btn-line {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.35);
            color: var(--text) !important;
        }

        .btn-line:hover {
            border-color: var(--primary);
            color: var(--primary) !important;
            transform: translateY(-2px);
        }

        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .badge-soft {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 0.8rem;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(61, 220, 151, 0.12);
            color: var(--primary);
            border: 1px solid rgba(61, 220, 151, 0.2);
        }

        .chips {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--panel);
            border: 1px solid var(--border);
            color: var(--muted);
            border-radius: var(--radius-full);
            padding: 0.35rem 0.9rem;
            font-size: 0.8rem;
        }

        .site-topbar {
            background: #06090C;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .topbar-inner {
            min-height: 34px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            font-size: 0.75rem;
            color: var(--muted);
            letter-spacing: 0.02em;
        }

        .topbar-domain {
            font-weight: 600;
            color: var(--text);
        }

        .topbar-right a {
            color: var(--muted);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .topbar-right a:hover {
            color: var(--primary);
        }

        .site-navbar {
            position: sticky;
            top: 0;
            z-index: 1070;
            background: rgba(11, 15, 20, 0.72);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            min-height: 72px;
            transition: background 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
        }

        .site-navbar.is-stuck {
            background: rgba(8, 11, 16, 0.92);
            border-color: var(--border);
            box-shadow: 0 10px 35px rgba(0, 0, 0, 0.2);
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.65rem;
            flex-shrink: 0;
        }

        .logo-badge {
            display: inline-flex;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--primary);
            color: var(--primary-deep);
            font-size: 1rem;
            font-weight: 800;
            letter-spacing: -0.04em;
            align-items: center;
            justify-content: center;
            text-transform: uppercase;
            box-shadow: 0 0 0 4px rgba(61, 220, 151, 0.12);
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.02em;
            line-height: 1.1;
        }

        .logo-text b {
            color: var(--primary);
            font-weight: 700;
        }

        .navbar-nav {
            gap: 0.2rem;
            margin: 0 auto;
        }

        .navbar-nav .nav-link {
            color: #CDD7E0;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.55rem 0.9rem !important;
            border-radius: 6px;
            position: relative;
            transition: color 0.2s var(--ease), background 0.2s var(--ease);
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--primary);
        }

        .navbar-nav .nav-link::after {
            content: "";
            display: block;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.2s var(--ease);
            margin-top: 3px;
        }

        .navbar-nav .nav-link:hover::after,
        .navbar-nav .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: var(--primary-deep);
            font-weight: 700;
            font-size: 0.92rem;
            padding: 0.6rem 1rem;
            border-radius: 8px;
            transition: all 0.2s var(--ease);
        }

        .nav-cta:hover {
            background: #68efb5;
            color: var(--primary-deep);
            transform: translateY(-2px);
        }

        .navbar-toggler {
            border: none;
            color: var(--text);
            font-size: 1.4rem;
            padding: 0.35rem 0.6rem;
            background: transparent;
            border-radius: 8px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 220, 151, 0.3);
        }

        .article-cover {
            position: relative;
            min-height: clamp(310px, 42vh, 480px);
            padding: clamp(6.5rem, 12vh, 9rem) 0 2.8rem;
            background-image: linear-gradient(180deg, rgba(6, 9, 12, 0.45) 0%, rgba(6, 9, 12, 0.55) 42%, #0B0F14 100%), url('/assets/images/backpic/back-1.webp');
            background-position: center 28%;
            background-size: cover;
            border-bottom: 1px solid var(--border);
        }

        .article-cover.empty-cover {
            background-image: linear-gradient(180deg, rgba(6, 9, 12, 0.6) 0%, rgba(11, 15, 20, 0.82) 80%), url('/assets/images/backpic/back-3.png');
            background-position: center 38%;
            background-size: cover;
        }

        .article-cover-inner {
            max-width: 920px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.55rem;
            color: var(--muted);
            font-size: 0.88rem;
            margin-bottom: 1.2rem;
        }

        .article-breadcrumb a {
            color: var(--muted);
            transition: color 0.2s var(--ease);
        }

        .article-breadcrumb a:hover {
            color: var(--primary);
        }

        .article-breadcrumb .bc-sep {
            color: rgba(255, 255, 255, 0.3);
        }

        .article-title {
            font-size: clamp(1.85rem, 5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: 1.4rem;
            text-shadow: 0 2px 15px rgba(0, 0, 0, 0.25);
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem 1.6rem;
            color: #B8C5D1;
            font-size: 0.9rem;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
        }

        .article-meta .cat-pill {
            background: rgba(61, 220, 151, 0.14);
            color: var(--primary);
            border: 1px solid rgba(61, 220, 151, 0.25);
            border-radius: var(--radius-full);
            padding: 0.28rem 0.9rem;
            font-size: 0.8rem;
        }

        .article-reader {
            padding-top: clamp(48px, 7vw, 84px);
            padding-bottom: clamp(48px, 7vw, 84px);
        }

        .article-body {
            max-width: 780px;
            margin: 0 auto;
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: clamp(2rem, 5vw, 4rem);
            font-size: 1.06rem;
            line-height: 1.9;
            color: #CFD9E2;
        }

        .article-body h2 {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text);
            margin: 2.4rem 0 1rem;
            padding-left: 0.75rem;
            border-left: 4px solid var(--primary);
        }

        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin: 2rem 0 0.75rem;
        }

        .article-body h4 {
            font-weight: 700;
            color: var(--text);
            margin: 1.5rem 0 0.6rem;
        }

        .article-body p {
            margin-bottom: 1.2rem;
        }

        .article-body ul,
        .article-body ol {
            padding-left: 1.4rem;
            margin-bottom: 1.4rem;
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .article-body blockquote {
            border-left: 3px solid var(--accent);
            background: rgba(255, 255, 255, 0.04);
            padding: 1rem 1.5rem;
            border-radius: 0 10px 10px 0;
            color: var(--muted);
            margin: 1.8rem 0;
        }

        .article-body code {
            background: #0E151B;
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 0.2rem 0.45rem;
            border-radius: 5px;
            color: var(--primary);
            font-size: 0.9em;
        }

        .article-body pre {
            background: #0E151B;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.5rem;
            overflow-x: auto;
        }

        .article-body pre code {
            background: transparent;
            border: 0;
            padding: 0;
            color: #DCE8F2;
        }

        .article-body img {
            border-radius: 12px;
            margin: 1.6rem auto;
        }

        .article-body a {
            color: var(--primary);
            border-bottom: 1px solid rgba(61, 220, 151, 0.4);
        }

        .article-body a:hover {
            color: #68efb5;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
            font-size: 0.94rem;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--border);
            padding: 0.75rem 1rem;
        }

        .article-body th {
            background: rgba(255, 255, 255, 0.04);
            font-weight: 700;
            color: var(--text);
        }

        .article-end-note {
            max-width: 780px;
            margin: 1.5rem auto 0;
            background: rgba(255, 255, 255, 0.025);
            border: 1px dashed var(--border);
            border-radius: 12px;
            padding: 0.75rem 1.25rem;
            font-size: 0.88rem;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .article-bottom-nav {
            max-width: 780px;
            margin: 2.8rem auto 0;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .article-bottom-nav a {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            flex: 1 1 200px;
            justify-content: center;
            padding: 0.8rem 1.25rem;
            border: 1px solid var(--border);
            background: var(--panel);
            border-radius: 10px;
            font-weight: 600;
            color: var(--text);
            transition: all 0.25s var(--ease);
        }

        .article-bottom-nav a:hover {
            border-color: rgba(61, 220, 151, 0.6);
            color: var(--primary);
            background: var(--panel-2);
            transform: translateY(-2px);
        }

        .article-related {
            padding: 0 0 var(--space-section);
        }

        .article-related .container-narrow {
            max-width: 1120px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 1.5rem;
        }

        .related-card {
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.25rem;
            display: grid;
            grid-template-columns: 200px 1fr;
            gap: 1.3rem;
            align-items: center;
            transition: all 0.25s var(--ease);
        }

        .related-card:hover {
            background: var(--panel-2);
            transform: translateY(-4px);
            border-color: rgba(61, 220, 151, 0.5);
            box-shadow: var(--shadow-card);
        }

        .related-img {
            border-radius: 10px;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #0F171E;
        }

        .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transform: scale(1.01);
            transition: transform 0.5s var(--ease);
        }

        .related-card:hover .related-img img {
            transform: scale(1.05);
        }

        .related-info {
            min-width: 0;
        }

        .related-info h3 {
            font-size: 1.15rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text);
            margin-bottom: 0.4rem;
        }

        .related-info p {
            color: var(--muted);
            font-size: 0.9rem;
            margin-bottom: 0.8rem;
        }

        .related-info .more-line {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--primary);
            font-size: 0.88rem;
            font-weight: 600;
        }

        .newsletter-cta {
            background: linear-gradient(135deg, #0C1118 0%, #131C24 100%);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: clamp(60px, 8vw, 96px) 0;
            position: relative;
            overflow: hidden;
        }

        .newsletter-cta::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(61, 220, 151, 0.06), transparent 45%);
            pointer-events: none;
        }

        .newsletter-inner {
            position: relative;
            z-index: 1;
            max-width: 760px;
            margin: 0 auto;
            text-align: center;
        }

        .newsletter-inner h2 {
            font-size: clamp(1.8rem, 3.8vw, 2.7rem);
            font-weight: 800;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .newsletter-inner p {
            color: var(--muted);
            margin-bottom: 2rem;
            font-size: 1.03rem;
        }

        .newsletter-inner .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        .not-found-card {
            max-width: 780px;
            margin: 0 auto;
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: clamp(2.5rem, 6vw, 4.5rem);
            text-align: center;
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 1.4rem;
            border-radius: 50%;
            background: rgba(244, 181, 106, 0.1);
            border: 1px solid rgba(244, 181, 106, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.7rem;
            color: var(--accent);
        }

        .not-found-card h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .not-found-card p {
            color: var(--muted);
            max-width: 420px;
            margin: 0 auto 1.8rem;
        }

        .site-footer {
            background: #070A0E;
            border-top: 1px solid var(--border);
            padding-top: clamp(52px, 7vw, 80px);
            color: var(--muted);
            font-size: 0.95rem;
        }

        .site-footer .footer-logo .logo-badge {
            background: var(--primary);
            color: var(--primary-deep);
        }

        .site-footer .footer-logo .logo-text {
            color: #EDF2F7;
        }

        .footer-brand-desc {
            max-width: 420px;
            margin: 1.2rem 0 1.3rem;
            color: var(--muted);
            line-height: 1.8;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #DCE5ED;
            margin-bottom: 1.2rem;
            letter-spacing: 0.02em;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 0.65rem;
        }

        .footer-links a {
            color: var(--muted);
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .footer-links a i {
            font-size: 0.75rem;
            opacity: 0.7;
            transition: opacity 0.2s var(--ease);
        }

        .footer-links a:hover i {
            opacity: 1;
        }

        .footer-contact-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            gap: 0.75rem;
        }

        .footer-contact-list li {
            display: flex;
            gap: 0.7rem;
            align-items: flex-start;
            line-height: 1.6;
        }

        .footer-contact-list i {
            color: var(--primary);
            margin-top: 0.35rem;
            font-size: 0.95rem;
        }

        .footer-contact-list a {
            color: var(--muted);
        }

        .footer-contact-list a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: clamp(40px, 6vw, 60px);
            padding: 1.2rem 0;
            font-size: 0.84rem;
            color: #687786;
        }

        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 0.8rem;
        }

        .footer-bottom a {
            color: var(--muted);
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(7, 10, 14, 0.98);
                border: 1px solid var(--border);
                border-radius: 16px;
                margin-top: 1rem;
                padding: 1rem;
                box-shadow: 0 20px 45px rgba(0, 0, 0, 0.45);
            }

            .navbar-nav {
                margin: 0 0 1rem;
                gap: 0.2rem;
            }

            .navbar-nav .nav-link {
                padding: 0.7rem 0.9rem !important;
                border-radius: 8px;
            }

            .nav-cta {
                width: 100%;
                justify-content: center;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .topbar-right {
                display: none;
            }

            .topbar-inner {
                justify-content: center;
                min-height: 32px;
            }

            .navbar-nav .nav-link {
                font-size: 1rem;
            }

            .article-bottom-nav a {
                flex: 1 1 100%;
            }

            .related-card {
                grid-template-columns: 130px 1fr;
                padding: 0.85rem;
                gap: 1rem;
            }

            .related-info h3 {
                font-size: 1rem;
            }

            .related-info p {
                font-size: 0.82rem;
            }
        }

        @media (max-width: 575.98px) {
            .brand-logo {
                gap: 0.5rem;
            }

            .logo-badge {
                width: 34px;
                height: 34px;
                border-radius: 9px;
                font-size: 0.82rem;
            }

            .logo-text {
                font-size: 1.08rem;
            }

            .article-cover {
                min-height: 300px;
                padding-top: 5rem;
            }

            .article-meta {
                gap: 0.8rem;
                font-size: 0.82rem;
            }

            .article-body {
                padding: 1.5rem;
                font-size: 1rem;
            }

            .article-body h2 {
                font-size: 1.45rem;
            }

            .related-card {
                grid-template-columns: 1fr;
            }

            .related-img {
                aspect-ratio: 16 / 9;
            }

            .newsletter-inner .cta-actions .btn {
                width: 100%;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.001s !important;
                transition-duration: 0.001s !important;
                scroll-behavior: auto !important;
            }

            .related-card,
            .related-card:hover {
                transform: none;
            }

            .navbar-nav .nav-link::after {
                transition: none;
                transform: scaleX(0);
            }
        }

/* roulang page: category2 */
:root {
            --c-bg: #0b0f14;
            --c-panel: #131a21;
            --c-panel-2: #182129;
            --c-hover: #1a232c;
            --c-line: rgba(255, 255, 255, 0.08);
            --c-line-strong: rgba(255, 255, 255, 0.16);
            --c-text-1: #edf2f7;
            --c-text-2: #9baab8;
            --c-text-3: #647584;
            --c-main: #3ddc97;
            --c-main-dark: #06231a;
            --c-accent: #f4b56a;
            --radius-lg: 12px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.4);
            --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
            --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            background: var(--c-bg);
            color: var(--c-text-1);
            font-family: var(--font-cn);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s var(--ease);
        }

        button,
        input {
            font: inherit;
        }

        .container {
            max-width: 1280px;
        }

        ::selection {
            background: rgba(61, 220, 151, 0.3);
            color: #fff;
        }

        .bg-soft-grid {
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
        }

        .eyebrow-line {
            color: var(--c-main);
            font-size: .77rem;
            font-weight: 700;
            letter-spacing: .12em;
            text-transform: uppercase;
            margin-bottom: 10px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .eyebrow-line::before {
            content: "";
            width: 22px;
            height: 2px;
            background: var(--c-main);
            display: inline-block;
            border-radius: 4px;
        }

        .section-pad {
            padding-top: clamp(64px, 9vw, 110px);
            padding-bottom: clamp(64px, 9vw, 110px);
        }

        /* ===== Header ===== */
        .site-header {
            position: relative;
            z-index: 1040;
        }

        .site-topbar {
            background: #090c10;
            border-bottom: 1px solid rgba(255, 255, 255, 0.055);
            min-height: 36px;
            font-size: .8rem;
            color: #8b99a6;
            letter-spacing: .02em;
        }

        .topbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            min-height: 36px;
            gap: 16px;
        }

        .topbar-domain {
            letter-spacing: .04em;
            color: #c2cdd6;
        }

        .topbar-right a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #9baab8;
        }

        .topbar-right a:hover {
            color: var(--c-main);
        }

        .site-navbar {
            background: rgba(11, 15, 20, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
            padding-top: 10px;
            padding-bottom: 10px;
            position: sticky;
            top: 0;
            z-index: 1030;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-badge {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--c-main);
            color: var(--c-main-dark);
            border-radius: 12px;
            font-size: 1.2rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            box-shadow: 0 6px 20px rgba(61, 220, 151, 0.2);
        }

        .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #f0f5f9;
            letter-spacing: .01em;
            line-height: 1.15;
        }

        .logo-text b {
            color: var(--c-main);
            font-weight: 800;
        }

        .navbar-nav {
            gap: 6px;
        }

        .navbar-nav .nav-link {
            color: #b8c3cd;
            font-size: .95rem;
            font-weight: 500;
            padding: 8px 15px !important;
            border-radius: 6px;
            position: relative;
        }

        .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .navbar-nav .nav-link.active {
            color: var(--c-main) !important;
            font-weight: 600;
        }

        .navbar-nav .nav-link.active::after {
            content: "";
            position: absolute;
            left: 15px;
            right: 15px;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--c-main);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(61, 220, 151, 0.45);
            border-radius: 999px;
            color: var(--c-main);
            font-size: .87rem;
            font-weight: 600;
            padding: 7px 17px;
            transition: all .2s var(--ease);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--c-main);
            border-color: var(--c-main);
            color: var(--c-main-dark);
            box-shadow: 0 8px 22px rgba(61, 220, 151, 0.18);
        }

        .navbar-toggler {
            border: 0;
            color: #fff;
            font-size: 1.2rem;
            padding: 4px 8px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 8px;
            line-height: 1;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 220, 151, 0.2);
        }

        .navbar-toggler i {
            color: #fff;
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: #11181f;
                border: 1px solid rgba(255, 255, 255, 0.08);
                border-radius: 14px;
                padding: 18px;
                margin-top: 12px;
            }

            .navbar-nav {
                gap: 2px;
            }

            .navbar-nav .nav-link {
                padding: 12px 12px !important;
                border-radius: 8px;
            }

            .nav-cta {
                margin-top: 14px;
                justify-content: center;
            }
        }

        @media (max-width: 767px) {
            .site-topbar {
                font-size: .73rem;
            }
        }

        /* ===== 分类 Hero ===== */
        .category-hero {
            background:
                linear-gradient(100deg, rgba(7, 10, 14, 0.94) 0%, rgba(7, 10, 14, 0.78) 56%, rgba(9, 13, 18, 0.52) 100%),
                url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            min-height: 354px;
            display: flex;
            align-items: flex-end;
            padding: 72px 0 58px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            overflow: hidden;
        }

        .category-hero::after {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(61, 220, 151, 0.09) 0%, transparent 70%);
            pointer-events: none;
        }

        .cat-breadcrumb {
            margin-bottom: 18px;
        }

        .cat-breadcrumb ol {
            list-style: none;
            display: flex;
            padding: 0;
            margin: 0;
            gap: 10px;
            font-size: .8rem;
            color: #8495a2;
            flex-wrap: wrap;
        }

        .cat-breadcrumb li+li::before {
            content: "/";
            margin-right: 10px;
            color: #475563;
        }

        .cat-breadcrumb a:hover {
            color: var(--c-main);
        }

        .cat-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--c-main);
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: .13em;
            background: rgba(61, 220, 151, 0.1);
            border-radius: 999px;
            border: 1px solid rgba(61, 220, 151, 0.22);
            padding: 7px 16px;
            text-transform: uppercase;
            margin-bottom: 18px;
        }

        .category-hero h1 {
            font-size: clamp(1.9rem, 4.4vw, 3.3rem);
            line-height: 1.12;
            font-weight: 800;
            margin: 0 0 16px;
            letter-spacing: -.01em;
            max-width: 830px;
            color: #f4f7fa;
        }

        .category-hero h1 span {
            color: var(--c-main);
        }

        .cat-lead {
            color: #b7c2cc;
            font-size: 1.02rem;
            max-width: 820px;
            margin-bottom: 24px;
            line-height: 1.9;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-brand {
            background: var(--c-main);
            color: var(--c-main-dark);
            border: 0;
            font-weight: 700;
            padding: 11px 22px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            transition: all .2s var(--ease);
            box-shadow: 0 6px 18px rgba(61, 220, 151, 0.15);
        }

        .btn-brand:hover {
            background: #50e6a6;
            color: #052118;
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(61, 220, 151, 0.24);
        }

        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.28);
            color: #dfe6ec;
            font-weight: 600;
            padding: 11px 22px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .2s var(--ease);
        }

        .btn-ghost:hover {
            color: var(--c-main);
            border-color: rgba(61, 220, 151, 0.45);
        }

        /* ===== 指标条 ===== */
        .metric-band {
            border-bottom: 1px solid var(--c-line);
            background: #0d1217;
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2px;
            background: rgba(255, 255, 255, 0.04);
            border-left: 1px solid rgba(255, 255, 255, 0.04);
            border-right: 1px solid rgba(255, 255, 255, 0.04);
        }

        .metric-item {
            background: #0d1217;
            padding: 36px 28px 40px;
            position: relative;
            transition: background .25s ease;
        }

        .metric-item:hover {
            background: #111a21;
        }

        .metric-item::before {
            content: "";
            width: 28px;
            height: 3px;
            border-radius: 2px;
            background: var(--c-main);
            display: block;
            margin-bottom: 18px;
            opacity: .65;
        }

        .metric-num {
            font-size: 1.75rem;
            font-weight: 800;
            line-height: 1.1;
            color: #edf4f9;
            letter-spacing: -0.02em;
            margin-bottom: 9px;
        }

        .metric-num small {
            font-size: 1rem;
            color: var(--c-accent);
            font-weight: 700;
        }

        .metric-label {
            color: var(--c-accent);
            font-size: .8rem;
            font-weight: 700;
            letter-spacing: .08em;
            margin-bottom: 8px;
        }

        .metric-item p {
            margin-bottom: 0;
            color: #8d9baa;
            font-size: .88rem;
            line-height: 1.7;
        }

        @media (max-width: 991px) {
            .metric-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .metric-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 轮值词专题 ===== */
        .sem-focus {
            background: var(--c-bg);
        }

        .focus-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            gap: 30px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }

        .focus-header h2 {
            font-size: clamp(1.75rem, 3.2vw, 2.5rem);
            letter-spacing: -.02em;
            line-height: 1.22;
            margin: 0;
            max-width: 720px;
            font-weight: 700;
        }

        .focus-header p {
            color: var(--c-text-2);
            max-width: 480px;
            margin: 0;
            font-size: .95rem;
        }

        .intro-p {
            color: #9baab8;
            line-height: 1.95;
            max-width: 900px;
            margin-bottom: 38px;
            font-size: 1rem;
        }

        .intro-p strong {
            color: var(--c-main);
            font-weight: 600;
        }

        .word-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 28px;
        }

        .word-card {
            background: var(--c-panel);
            border: 1px solid var(--c-line);
            padding: 30px 28px;
            border-radius: var(--radius-lg);
            position: relative;
            transition: transform .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
        }

        .word-card:hover {
            background: var(--c-panel-2);
            border-color: rgba(61, 220, 151, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .word-card .label-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(61, 220, 151, 0.12);
            color: var(--c-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            margin-bottom: 20px;
            border: 1px solid rgba(61, 220, 151, 0.12);
        }

        .word-card .kind {
            font-size: .75rem;
            letter-spacing: .12em;
            font-weight: 700;
            text-transform: uppercase;
            color: var(--c-accent);
            margin-bottom: 5px;
            display: block;
        }

        .word-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .word-card p {
            font-size: .9rem;
            color: #94a3b1;
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .word-card .inspect {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: .83rem;
            color: var(--c-main);
            padding: 6px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 10px;
            font-weight: 500;
        }

        @media (max-width: 991px) {
            .word-cards {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 专题观察 ===== */
        .seo-insight {
            background: #0d1217;
            border-top: 1px solid var(--c-line);
            border-bottom: 1px solid var(--c-line);
            position: relative;
        }

        .seo-insight-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 40px;
            align-items: center;
        }

        .insight-copy h2 {
            font-size: clamp(1.7rem, 3vw, 2.4rem);
            line-height: 1.24;
            letter-spacing: -.02em;
            font-weight: 700;
        }

        .insight-copy .lead-line {
            color: #a7b4bf;
            line-height: 1.9;
            margin-top: 16px;
        }

        .insight-list {
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
        }

        .insight-list li {
            display: flex;
            gap: 14px;
            color: #bcc6ce;
            padding: 13px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            line-height: 1.75;
            font-size: .94rem;
        }

        .insight-list li i {
            color: var(--c-main);
            line-height: 1.75;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .insight-list li:last-child {
            border-bottom: 0;
        }

        .insight-media {
            position: relative;
        }

        .media-poster {
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.09);
            background: #11181f;
            position: relative;
            box-shadow: 0 28px 50px rgba(0, 0, 0, 0.25);
        }

        .media-poster img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4 / 3;
        }

        .media-note {
            position: absolute;
            left: 18px;
            bottom: 18px;
            background: rgba(11, 15, 20, 0.72);
            backdrop-filter: blur(9px);
            border: 1px solid rgba(255, 255, 255, 0.13);
            border-radius: 999px;
            color: #e9f0f5;
            padding: 8px 16px;
            font-size: .8rem;
            display: inline-flex;
            gap: 8px;
            align-items: center;
        }

        .media-note i {
            color: var(--c-main);
        }

        @media (max-width: 991px) {
            .seo-insight-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== 原则列表 ===== */
        .rule-list-section {
            background: var(--c-bg);
        }

        .rule-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .rule-list {
            border-top: 1px solid var(--c-line-strong);
        }

        .rule-item {
            display: grid;
            grid-template-columns: 64px minmax(220px, 1.2fr) minmax(280px, 1.6fr) 180px;
            align-items: center;
            gap: 22px;
            padding: 20px 16px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 0;
            transition: background .2s, padding-left .2s;
        }

        .rule-item:hover {
            background: rgba(255, 255, 255, 0.018);
            padding-left: 22px;
        }

        .rule-item .no {
            color: var(--c-accent);
            font-size: .82rem;
            font-weight: 800;
            letter-spacing: .06em;
        }

        .rule-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0;
            color: #e4ebf1;
        }

        .rule-item p {
            margin: 0;
            color: #8392a0;
            font-size: .9rem;
        }

        .rule-item .rule-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            justify-self: end;
            font-size: .8rem;
            color: #6f7f8d;
        }

        .rule-item .rule-label i {
            color: var(--c-main);
        }

        @media (max-width: 991px) {
            .rule-item {
                grid-template-columns: 52px 1fr 1.4fr;
            }

            .rule-item .rule-label {
                grid-column: 2 / 4;
                justify-self: start;
            }
        }

        @media (max-width: 767px) {
            .rule-item {
                grid-template-columns: 44px 1fr;
                gap: 8px 14px;
            }

            .rule-item p {
                grid-column: 2 / 3;
            }

            .rule-item .rule-label {
                grid-column: 2 / 3;
            }
        }

        /* ===== 工作区卡片 ===== */
        .workflow-block {
            background: #0d1217;
            border-top: 1px solid var(--c-line);
            border-bottom: 1px solid var(--c-line);
        }

        .workflow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .workflow-step {
            background: var(--c-panel);
            border-radius: var(--radius-lg);
            border: 1px solid var(--c-line);
            padding: 26px;
            transition: all .2s var(--ease);
        }

        .workflow-step:hover {
            border-color: rgba(61, 220, 151, 0.24);
            transform: translateY(-5px);
            background: var(--c-panel-2);
            box-shadow: var(--shadow-hover);
        }

        .workflow-step .step-id {
            display: inline-block;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(61, 220, 151, 0.1);
            color: var(--c-main);
            font-weight: 800;
            font-size: .8rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(61, 220, 151, 0.2);
            margin-bottom: 20px;
        }

        .workflow-step h3 {
            font-size: 1.07rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .workflow-step p {
            color: #90a1ad;
            font-size: .87rem;
            line-height: 1.78;
            margin-bottom: 14px;
        }

        .workflow-step a {
            color: var(--c-main);
            font-size: .82rem;
            font-weight: 600;
        }

        @media (max-width: 991px) {
            .workflow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .workflow-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-dark {
            background: #0b0f14;
        }

        .faq-card-wrap {
            background: rgba(19, 26, 33, 0.7);
            border: 1px solid var(--c-line);
            border-radius: 16px;
            padding: clamp(20px, 4vw, 46px);
        }

        .faq-card-wrap h2 {
            font-size: clamp(1.6rem, 3vw, 2.3rem);
            letter-spacing: -.01em;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .faq-card-wrap .faq-sub {
            color: var(--c-text-2);
            margin-bottom: 28px;
            font-size: .96rem;
        }

        .accordion {
            --bs-accordion-border-width: 0;
            --bs-accordion-border-radius: 0;
            --bs-accordion-inner-border-radius: 0;
            --bs-accordion-btn-focus-box-shadow: none;
            --bs-accordion-active-bg: transparent;
        }

        .accordion-item {
            background: transparent;
            border: 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 0 !important;
        }

        .accordion-button {
            background: transparent;
            color: #d7e0e7;
            font-weight: 600;
            font-size: .98rem;
            padding: 18px 0;
            border: 0;
            letter-spacing: .005em;
            box-shadow: none;
        }

        .accordion-button:hover {
            color: var(--c-main);
        }

        .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--c-main);
            box-shadow: none !important;
        }

        .accordion-button::after {
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\f078";
            background-image: none !important;
            color: #7c8a97;
            width: auto;
            height: auto;
            font-size: .9rem;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
            color: var(--c-main);
        }

        .accordion-body {
            padding: 0 0 22px;
            color: #81909e;
            line-height: 1.9;
            font-size: .94rem;
        }

        /* ===== 相关导航 ===== */
        .cross-nav-section {
            background: #0d1217;
            border-top: 1px solid var(--c-line);
        }

        .cross-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .cross-card {
            background: var(--c-panel);
            border: 1px solid var(--c-line);
            border-radius: var(--radius-lg);
            padding: 28px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
            transition: all .22s var(--ease);
        }

        .cross-card:hover {
            background: var(--c-panel-2);
            transform: translateY(-4px);
            border-color: rgba(61, 220, 151, 0.28);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }

        .cross-card i.arg {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(61, 220, 151, 0.08);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--c-main);
            margin-bottom: 5px;
        }

        .cross-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin: 0;
        }

        .cross-card p {
            color: #7e8d9a;
            font-size: .86rem;
            margin: 0;
            line-height: 1.7;
        }

        .cross-card .go-link {
            margin-top: 8px;
            color: var(--c-main);
            font-size: .84rem;
            font-weight: 600;
        }

        @media (max-width: 991px) {
            .cross-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== CTA ===== */
        .cta-band {
            background: linear-gradient(120deg, rgba(13, 18, 23, 0.94), rgba(8, 14, 20, 0.6)),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-top: 1px solid var(--c-line);
            padding: clamp(56px, 9vw, 100px) 0;
        }

        .cta-inner {
            text-align: center;
            max-width: 760px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: clamp(1.7rem, 3.6vw, 2.7rem);
            letter-spacing: -.02em;
            font-weight: 800;
        }

        .cta-inner h2 span {
            color: var(--c-main);
        }

        .cta-inner p {
            color: #a0afba;
            margin: 18px auto 30px;
            max-width: 620px;
            line-height: 1.9;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #090c10;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 0;
            color: #8a99a8;
        }

        .site-footer .footer-logo {
            margin-bottom: 15px;
        }

        .footer-brand-desc {
            font-size: .9rem;
            line-height: 1.9;
            color: #8a99a7;
            margin-top: 6px;
            max-width: 340px;
        }

        .footer-title {
            color: #e8eef3;
            font-size: .9rem;
            font-weight: 700;
            letter-spacing: .05em;
            margin-bottom: 18px;
        }

        .footer-links,
        .footer-contact-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li,
        .footer-contact-list li {
            margin-bottom: 9px;
        }

        .footer-links a {
            color: #8795a2;
            font-size: .93rem;
            display: inline-flex;
            align-items: center;
            gap: 2px;
        }

        .footer-links a i {
            font-size: .75rem;
            color: #647584;
            transition: all .2s;
        }

        .footer-links a:hover {
            color: var(--c-main);
        }

        .footer-links a:hover i {
            transform: translateX(3px);
            color: var(--c-main);
        }

        .footer-contact-list li {
            display: flex;
            gap: 10px;
            font-size: .89rem;
            line-height: 1.7;
            color: #8392a0;
            margin-bottom: 12px;
        }

        .footer-contact-list i {
            color: var(--c-main);
            margin-top: 5px;
            width: 16px;
            text-align: center;
        }

        .footer-contact-list a {
            color: #aebbc5;
        }

        .footer-contact-list a:hover {
            color: var(--c-main);
        }

        .chips {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.09);
            background: rgba(255, 255, 255, 0.03);
            padding: 6px 13px;
            font-size: .75rem;
            color: #8fa1ad;
        }

        .chips i {
            color: var(--c-main);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.055);
            margin-top: 30px;
            padding: 20px 0 28px;
            font-size: .78rem;
        }

        .footer-bottom .bottom-holder {
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            color: #5e6e7b;
        }

        .footer-bottom a {
            color: #7f8d9b;
        }

        .footer-bottom a:hover {
            color: var(--c-main);
        }

        @media (max-width: 520px) {
            .site-footer {
                padding-top: 48px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                scroll-behavior: auto !important;
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category3 */
:root {
    --bg: #0B0F14;
    --bg-deep: #080B10;
    --panel: #131A21;
    --panel-hover: #1A232C;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.16);
    --text: #EDF2F7;
    --muted: #9BAAB8;
    --brand: #3DDC97;
    --brand-ink: #06231A;
    --hot: #F4B56A;
    --radius: 12px;
    --radius-sm: 6px;
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
    --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
    --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: #6ff0b7; }
img { max-width: 100%; display: block; object-fit: cover; }
button, input, textarea { font-family: inherit; }
input:focus-visible, button:focus-visible, a:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }

.container { max-width: 1280px; padding-left: 24px; padding-right: 24px; }
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section-head { margin-bottom: 40px; }
.kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .12em;
    color: var(--brand);
    margin-bottom: 14px;
}
.kicker::before { content: ""; width: 24px; height: 2px; background: var(--brand); border-radius: 2px; }
.section-head h2 {
    font-size: clamp(1.75rem, 3.2vw, 2.75rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text);
    margin: 0 0 14px;
}
.section-head p { font-size: 17px; color: var(--muted); max-width: 760px; margin: 0; }
.text-lead { color: var(--muted); font-size: 17px; }
.chips {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--muted);
    font-size: 13px;
}
.chips i { color: var(--brand); }

/* ========== 顶部细条 ========== */
.site-topbar { background: var(--bg-deep); border-bottom: 1px solid rgba(255, 255, 255, 0.03); }
.topbar-inner { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 14px; color: #778796; font-size: 12.5px; letter-spacing: .02em; }
.topbar-inner a { color: #9BAAB8; transition: color .2s; }
.topbar-inner a:hover { color: var(--brand); }
.topbar-domain { color: #A8B6C4; font-weight: 600; }
.topbar-right { display: inline-flex; align-items: center; gap: 14px; }

/* ========== 主导航 ========== */
.site-header { position: relative; z-index: 1030; }
.site-navbar {
    background: rgba(11, 15, 20, .85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, .07);
    transition: box-shadow .25s;
}
.site-navbar.is-stuck { box-shadow: 0 12px 34px rgba(0, 0, 0, .42); }
.brand-logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-badge {
    width: 42px; height: 42px;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--brand);
    color: var(--brand-ink);
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -.02em;
    border-radius: 12px 12px 12px 4px;
    text-transform: lowercase;
    box-shadow: 0 8px 20px rgba(61, 220, 151, .22);
}
.logo-text { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: .01em; line-height: 1.2; }
.logo-text b { color: var(--brand); font-weight: 800; }
.navbar .navbar-toggler { border: 0; color: var(--text); font-size: 22px; padding: 6px 8px; background: transparent; }
.navbar .navbar-toggler:focus { box-shadow: none; outline: 2px solid rgba(61,220,151,.6); border-radius: 5px; }
.navbar-nav { gap: 30px; margin: 0 auto; }
.navbar-nav .nav-item { list-style: none; }
.navbar-nav .nav-link {
    color: #C7D2DE;
    font-size: 15px;
    font-weight: 500;
    padding: 22px 0 18px;
    position: relative;
    transition: color .2s var(--ease);
}
.navbar-nav .nav-link:hover { color: var(--text); }
.navbar-nav .nav-link.active { color: var(--brand); }
.navbar-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 100%;
    bottom: 12px;
    height: 2px;
    background: var(--brand);
    border-radius: 2px;
    transition: right .25s var(--ease);
}
.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after { right: 0; }
.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--brand);
    color: var(--brand-ink);
    font-weight: 700;
    font-size: 14px;
    padding: 10px 18px;
    border-radius: 999px;
    transition: background .2s, transform .2s var(--ease);
    white-space: nowrap;
}
.nav-cta:hover { color: #fff; background: #55e0aa; transform: translateY(-1px); }
.navbar-collapse { flex-grow: 0; }

/* ========== 品牌页首 ========== */
.page-hero {
    min-height: 420px;
    display: flex;
    align-items: center;
    position: relative;
    padding: 92px 0 70px;
    background:
        linear-gradient(120deg, rgba(11,15,20,.96) 0%, rgba(11,15,20,.82) 55%, rgba(11,15,20,.55) 100%),
        linear-gradient(180deg, rgba(11,15,20,.6) 0%, rgba(11,15,20,.95) 100%),
        url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    border-bottom: 1px solid rgba(255,255,255,.05);
}
.breadcrumb-custom { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13.5px; color: var(--muted); margin-bottom: 28px; }
.breadcrumb-custom a { color: #A9BAC4; transition: color .2s; }
.breadcrumb-custom a:hover { color: var(--brand); }
.breadcrumb-custom i { font-size: 11px; color: #5C6B79; }
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border: 1px solid rgba(61,220,151,.4);
    background: rgba(61,220,151,.08);
    color: var(--brand);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .1em;
    margin-bottom: 20px;
}
.page-hero h1 {
    font-size: clamp(2.35rem, 5.4vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -.02em;
    margin: 0 0 20px;
    color: #F3F7F9;
}
.page-hero h1 .gradient-line {
    display: block;
    color: #EDF2F7;
    background: linear-gradient(95deg, var(--brand) 0%, #E7FBEF 70%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.page-hero p.hero-lead {
    max-width: 760px;
    color: #B8C6D1;
    font-size: 17px;
    line-height: 1.9;
    margin: 0 0 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn-main {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid var(--brand);
    background: var(--brand);
    color: var(--brand-ink);
    font-weight: 700;
    font-size: 15px;
    padding: 12px 22px;
    border-radius: var(--radius-sm);
    transition: background .2s, border-color .2s, transform .2s var(--ease), box-shadow .2s;
    box-shadow: 0 8px 24px rgba(61,220,151,.16);
}
.btn-main:hover { color: #fff; background: #55e0aa; border-color: #55e0aa; transform: translateY(-2px); }
.btn-line {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid rgba(255,255,255,.35);
    background: transparent;
    color: #E2E9EF;
    font-weight: 600;
    padding: 12px 22px;
    border-radius: var(--radius-sm);
    transition: border-color .2s, color .2s, transform .2s var(--ease), background .2s;
}
.btn-line:hover { color: var(--brand); border-color: var(--brand); background: rgba(61,220,151,.05); transform: translateY(-2px); }

/* 更新提示 */
.update-strip {
    background: rgba(61,220,151,.06);
    border: 1px solid rgba(61,220,151,.18);
    border-radius: var(--radius);
    padding: 14px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #C5E9D9;
    font-size: 14px;
    margin: -32px auto 0;
    position: relative;
    z-index: 2;
    box-shadow: 0 12px 24px rgba(0,0,0,.2);
}
.update-strip i { color: var(--brand); font-size: 16px; }
.anchor-position { position: relative; top: -70px; }

/* ========== 内容区块通用 ========== */
.section-alt { background: #0D1319; border-top: 1px solid rgba(255,255,255,.04); border-bottom: 1px solid rgba(255,255,255,.04); }

/* ========== 横滑工具卡 ========== */
.scroll-deck-wrap { position: relative; }
.scroll-deck {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 4px 4px 24px;
    scroll-snap-type: x mandatory;
}
.scroll-deck::-webkit-scrollbar { height: 7px; }
.scroll-deck::-webkit-scrollbar-track { background: rgba(255,255,255,.04); border-radius: 8px; }
.scroll-deck::-webkit-scrollbar-thumb { background: rgba(255,255,255,.18); border-radius: 8px; }
.scroll-deck { scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.25) transparent; }
.deck-item {
    flex: 0 0 330px;
    scroll-snap-align: start;
    background: var(--panel);
    border: 1px solid rgba(255,255,255,.07);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .25s var(--ease), border-color .25s, box-shadow .25s;
}
.deck-item:hover { border-color: rgba(61,220,151,.35); transform: translateY(-4px); box-shadow: var(--shadow); }
.deck-media { height: 170px; overflow: hidden; position: relative; background: #101720; }
.deck-media img { width: 100%; height: 100%; transition: transform .4s var(--ease); }
.deck-item:hover .deck-media img { transform: scale(1.04); }
.deck-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(11,15,20,.64)); }
.deck-label { position: absolute; left: 14px; bottom: 12px; z-index: 2; font-size: 13px; color: #fff; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.deck-label i { color: var(--hot); }
.deck-body { padding: 18px 20px 22px; }
.deck-body h3 { font-size: 18px; font-weight: 700; margin: 0 0 8px; letter-spacing: .01em; }
.deck-body p { color: var(--muted); font-size: 14.5px; line-height: 1.7; margin: 0 0 14px; }
.deck-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-sm {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 600;
    color: var(--brand);
    background: rgba(61,220,151,.09);
    border: 1px solid rgba(61,220,151,.14);
    padding: 4px 10px;
    border-radius: 999px;
}

/* ========== 数据条 ========== */
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.metric-card {
    background: var(--panel);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius);
    padding: 28px 26px;
    transition: background .2s, transform .2s var(--ease), border-color .2s;
}
.metric-card:hover { background: var(--panel-hover); border-color: rgba(61,220,151,.2); transform: translateY(-3px); }
.metric-num { font-size: 42px; font-weight: 800; line-height: 1; color: var(--brand); letter-spacing: -.02em; margin-bottom: 12px; }
.metric-num small { font-size: 22px; font-weight: 700; color: #a8e9c9; }
.metric-card h3 { font-size: 15px; font-weight: 600; color: #E9F1F6; margin: 0 0 6px; }
.metric-card p { font-size: 13.5px; color: var(--muted); line-height: 1.65; margin: 0; }

/* ========== 非对称说明区 ========== */
.feature-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 44px; align-items: stretch; }
.feature-card {
    min-height: 420px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,.09);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    padding: 40px;
    background:
        linear-gradient(180deg, rgba(11,15,20,.32) 0%, rgba(11,15,20,.94) 100%),
        url('/assets/images/backpic/back-3.png') center / cover no-repeat;
}
.feature-card::after { content: ""; position: absolute; inset: 0; background: rgba(11,15,20,.3); z-index: 0; }
.feature-card .feature-inner { position: relative; z-index: 1; }
.feature-card .tag-sm { margin-bottom: 14px; }
.feature-card h3 { font-size: 28px; font-weight: 700; color: #fff; line-height: 1.35; margin-bottom: 12px; max-width: 400px; }
.feature-card p { color: rgba(255,255,255,.78); max-width: 420px; font-size: 15px; line-height: 1.8; margin-bottom: 18px; }
.border-note { font-size: 13px; color: rgba(255,255,255,.66); display: flex; gap: 8px; }
.border-note i { color: var(--hot); margin-top: 3px; }

.list-panel { background: var(--panel); border: 1px solid rgba(255,255,255,.08); border-radius: 14px; padding: 26px 30px; }
.list-panel-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid rgba(255,255,255,.09); padding-bottom: 18px; margin-bottom: 4px; }
.list-panel-heading h3 { font-size: 20px; font-weight: 700; margin: 0; }
.list-panel-heading span { font-size: 13px; color: var(--muted); }
.list-rows { display: flex; flex-direction: column; }
.list-row { display: grid; grid-template-columns: 44px 1fr auto; gap: 18px; align-items: start; padding: 22px 4px; border-bottom: 1px solid rgba(255,255,255,.07); }
.list-row:last-child { border-bottom: 0; }
.row-no { font-size: 18px; font-weight: 800; color: var(--hot); font-style: normal; line-height: 1.6; }
.row-main h4 { font-size: 16px; font-weight: 700; margin: 0 0 6px; }
.row-main p { color: var(--muted); font-size: 14px; line-height: 1.65; margin: 0; }
.row-go { color: #657483; font-size: 14px; transition: color .2s, transform .2s; }
.list-row:hover .row-go { color: var(--brand); transform: translateX(3px); }

/* ========== 工作流步骤 ========== */
.flow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.flow-card {
    background: #10161D;
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius);
    padding: 30px 28px;
    position: relative;
    transition: border-color .2s, transform .2s var(--ease), background .2s;
}
.flow-card:hover { border-color: rgba(61,220,151,.24); background: var(--panel-hover); transform: translateY(-3px); }
.flow-index { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 10px; background: rgba(61,220,151,.1); color: var(--brand); font-weight: 800; font-size: 16px; margin-bottom: 18px; }
.flow-card h3 { font-size: 17px; font-weight: 700; margin: 0 0 10px; }
.flow-card p { color: var(--muted); font-size: 14.5px; margin: 0; line-height: 1.75; }
.flow-card small { display: block; margin-top: 12px; color: #7C8B99; font-size: 12.5px; }

/* ========== 内部链接卡 ========== */
.index-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.index-card {
    background: var(--panel);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius);
    padding: 26px;
    transition: border-color .25s, transform .25s var(--ease), background .25s;
}
.index-card:hover { background: var(--panel-hover); border-color: rgba(61,220,151,.3); transform: translateY(-3px); }
.index-icon { width: 42px; height: 42px; border-radius: 10px; background: rgba(244,181,106,.1); color: var(--hot); display: inline-flex; align-items: center; justify-content: center; margin-bottom: 16px; font-size: 18px; }
.index-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.index-card p { color: var(--muted); font-size: 14px; margin-bottom: 14px; line-height: 1.7; }
.index-more { color: var(--brand); font-size: 13.5px; font-weight: 600; }
.index-card:hover .index-more { color: #8bf0c0; }

/* ========== FAQ ========== */
.faq-wrap { max-width: 980px; margin: 0 auto; }
.accordion-item { background: transparent; border: 0; border-bottom: 1px solid rgba(255,255,255,.09); }
.accordion-item:first-of-type { border-top: 1px solid rgba(255,255,255,.09); }
.accordion-button {
    background: transparent;
    border: 0;
    box-shadow: none;
    color: var(--text);
    font-size: 16px;
    font-weight: 700;
    padding: 24px 36px 24px 0;
    position: relative;
    border-radius: 0 !important;
}
.accordion-button::before { content: ""; position: absolute; left: 0; top: 24px; bottom: 24px; width: 2px; background: rgba(255,255,255,.22); border-radius: 2px; transition: background .2s; }
.accordion-button:not(.collapsed) { color: var(--brand); background: transparent; box-shadow: none; }
.accordion-button:not(.collapsed)::before { background: var(--brand); }
.accordion-button::after { background-image: none; content: "\f078"; font-family: "Font Awesome 6 Free"; font-weight: 900; color: var(--muted); width: auto; height: auto; transform: none; flex-shrink: 0; }
.accordion-button:not(.collapsed)::after { transform: rotate(180deg); color: var(--brand); }
.accordion-button:focus { box-shadow: none; outline: 2px solid rgba(61,220,151,.3); }
.accordion-body { padding: 0 40px 26px 18px; color: var(--muted); font-size: 15px; line-height: 1.85; }

/* ========== CTA ========== */
.contact-section { background: #0D1319; border-top: 1px solid rgba(255,255,255,.05); }
.cta-panel {
    border-radius: 18px;
    padding: clamp(36px, 6vw, 70px);
    background:
        linear-gradient(90deg, rgba(61,220,151,.12) 0%, rgba(244,181,106,.05) 100%),
        linear-gradient(180deg, rgba(11,15,20,.92) 0%, rgba(11,15,20,.98) 100%),
        url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    border: 1px solid rgba(61,220,151,.2);
    position: relative;
    overflow: hidden;
}
.cta-panel h2 { font-size: clamp(1.7rem, 3vw, 2.5rem); font-weight: 800; margin-bottom: 16px; line-height: 1.3; }
.cta-panel p { color: var(--muted); max-width: 620px; margin-bottom: 28px; font-size: 16px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.cta-mail { color: var(--muted); font-size: 14px; margin-top: 20px; }
.cta-mail a { color: var(--brand); }

/* ========== 页脚 ========== */
.site-footer { background: var(--bg-deep); border-top: 1px solid rgba(255,255,255,.07); padding-top: 72px; }
.footer-brand-desc { color: var(--muted); font-size: 14.5px; line-height: 1.8; max-width: 360px; margin: 22px 0 18px; }
.footer-title { color: #E9F1F6; font-size: 15px; font-weight: 700; margin: 0 0 18px; }
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 11px; }
.footer-links a { color: var(--muted); font-size: 14px; display: inline-flex; align-items: center; gap: 6px; transition: color .2s, transform .2s; }
.footer-links a i { font-size: 11px; opacity: .9; }
.footer-links a:hover { color: var(--brand); transform: translateX(3px); }
.footer-contact-list { list-style: none; margin: 0; padding: 0; }
.footer-contact-list li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 14px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.footer-contact-list li i { color: var(--brand); margin-top: 5px; font-size: 15px; width: 18px; text-align: center; }
.footer-contact-list a { color: #D6DEE5; transition: color .2s; }
.footer-contact-list a:hover { color: var(--brand); }
.footer-logo { margin-bottom: 4px; }
.footer-copyright {
    margin-top: 52px;
    padding: 20px 0;
    border-top: 1px solid rgba(255,255,255,.06);
    color: #687786;
    font-size: 13px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px;
}
.footer-copyright a { color: #8A98A5; }
.footer-copyright a:hover { color: var(--brand); }

/* ========== 响应式 ========== */
@media (max-width: 1199px) {
    .container { max-width: 980px; }
    .navbar-nav { gap: 20px; }
}
@media (max-width: 991px) {
    .site-topbar .topbar-inner span.d-none { display: none; }
    .site-navbar { padding-top: 10px; padding-bottom: 10px; }
    .navbar-collapse { margin-top: 6px; }
    .navbar-nav-wrapper {
        background: #0B0F14;
        border: 1px solid rgba(255,255,255,.08);
        border-radius: 12px;
        padding: 12px 16px 16px;
        width: 100%;
        margin-top: 8px;
    }
    .navbar-nav { flex-direction: column; gap: 2px; width: 100%; margin: 0; }
    .navbar-nav .nav-link { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.06); }
    .navbar-nav .nav-link::after { bottom: 0; }
    .nav-cta { margin-top: 14px; justify-content: center; }
    .page-hero { min-height: 380px; padding-top: 80px; }
    .metrics-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: 1fr; }
    .feature-card { min-height: 360px; }
    .flow-grid { grid-template-columns: 1fr; }
    .index-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 767px) {
    .container { padding-left: 18px; padding-right: 18px; }
    body { font-size: 15px; }
    .section { padding: 56px 0; }
    .section-head { margin-bottom: 30px; }
    .deck-item { flex: 0 0 86%; }
    .index-grid { grid-template-columns: 1fr; }
    .cta-actions { flex-direction: column; }
    .cta-panel h2 { font-size: 1.75rem; }
    .footer-copyright { flex-direction: column; }
    .page-hero { min-height: 360px; padding: 70px 0 56px; }
    .page-hero h1 { font-size: clamp(2rem, 12vw, 3.2rem); }
    .list-row { grid-template-columns: 36px 1fr; gap: 10px; }
    .row-go { display: none; }
    .accordion-body { padding-left: 12px; }
}
@media (max-width: 520px) {
    .topbar-right { display: none; }
    .topbar-inner { justify-content: center; }
    .page-hero { min-height: auto; }
    .feature-card { padding: 28px 22px; }
    .list-panel { padding: 18px; }
    .metrics-grid { grid-template-columns: 1fr; }
    .btn-main, .btn-line { width: 100%; }
    .update-strip { font-size: 13px; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
    .scroll-deck { scroll-snap-type: none; }
    .deck-item { scroll-snap-align: none; }
    .navbar-nav .nav-link::after { transition: none; }
}

/* roulang page: category4 */
:root {
            --bg: #0B0F14;
            --panel: #131A21;
            --panel-hover: #1A232C;
            --line: rgba(255, 255, 255, .08);
            --line-strong: rgba(255, 255, 255, .16);
            --text: #EDF2F7;
            --muted: #9BAAB8;
            --primary: #3DDC97;
            --on-primary: #06231A;
            --accent: #F4B56A;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, .4);
            --transition: 200ms cubic-bezier(.2, .7, .3, 1);
            --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            background: var(--bg);
            color: var(--text);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0 0 .6em;
            color: var(--text);
            line-height: 1.25;
            font-weight: 700;
        }

        h1 {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            line-height: 1.08;
            letter-spacing: -.02em;
        }

        h2 {
            font-size: clamp(1.75rem, 3.2vw, 2.75rem);
            line-height: 1.2;
            letter-spacing: -.01em;
        }

        h3 {
            font-size: 1.18rem;
            line-height: 1.45;
        }

        p {
            margin: 0 0 1em;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: #76EFB8;
        }

        img {
            max-width: 100%;
            display: block;
            border: 0;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            width: 100%;
        }

        .section {
            padding-top: clamp(64px, 9vw, 112px);
            padding-bottom: clamp(64px, 9vw, 112px);
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .76rem;
            font-weight: 600;
            letter-spacing: .14em;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .eyebrow i {
            font-size: .82rem;
            color: var(--accent);
        }

        .section-head {
            max-width: 780px;
            margin-bottom: clamp(36px, 6vw, 64px);
        }

        .section-head p {
            color: var(--muted);
            font-size: 1.05rem;
            margin: 0;
        }

        .pg-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background: var(--primary);
            color: var(--on-primary);
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: .96rem;
            padding: 12px 24px;
            line-height: 1.4;
            transition: all var(--transition);
            box-shadow: 0 0 0 0 rgba(61, 220, 151, 0);
        }

        .pg-btn:hover {
            background: #63E7B0;
            color: var(--on-primary);
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(61, 220, 151, .18);
        }

        .pg-btn.ghost {
            background: transparent;
            color: var(--text);
            border-color: rgba(255, 255, 255, .32);
        }

        .pg-btn.ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(61, 220, 151, .06);
        }

        .pg-btn:focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(61, 220, 151, .4);
            outline-offset: 3px;
        }

        ::selection {
            background: rgba(61, 220, 151, .24);
            color: #fff;
        }

        .site-topbar {
            background: #06090d;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            color: #8FA1B1;
            font-size: 12px;
            position: relative;
            z-index: 5;
        }

        .topbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 36px;
            gap: 20px;
        }

        .topbar-domain {
            color: #BFCBD5;
            font-weight: 600;
            letter-spacing: -.01em;
        }

        .topbar-inner .topbar-right {
            margin-left: auto;
            display: inline-flex;
            align-items: center;
            gap: 18px;
        }

        .topbar-inner span,
        .topbar-inner a {
            color: #8C9DAC;
        }

        .topbar-right a {
            color: #C6D1DA;
            text-decoration: none;
        }

        .topbar-right a:hover {
            color: var(--primary);
        }

        .topbar-right i {
            margin-right: 5px;
            font-size: 11px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1080;
        }

        .site-navbar {
            background: rgba(11, 15, 20, .82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, .075);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled .site-navbar {
            background: rgba(8, 11, 15, .96);
            box-shadow: 0 12px 40px rgba(0, 0, 0, .35);
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-badge {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: var(--on-primary);
            border-radius: 9px;
            font-weight: 800;
            font-size: 19px;
            letter-spacing: -.05em;
            box-shadow: 0 6px 18px rgba(61, 220, 151, .22);
        }

        .logo-text {
            color: #fff;
            font-size: 1.3rem;
            font-weight: 500;
            line-height: 1.1;
            letter-spacing: -.01em;
            white-space: nowrap;
        }

        .logo-text b {
            font-weight: 800;
            color: var(--primary);
        }

        .navbar-nav {
            gap: 2px;
            margin: 0 auto;
        }

        .site-navbar .nav-link {
            color: #C9D3DB;
            font-size: 15px;
            font-weight: 500;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            position: relative;
            white-space: nowrap;
            transition: color var(--transition), background var(--transition);
        }

        .site-navbar .nav-link::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 4px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }

        .site-navbar .nav-link:hover {
            color: var(--primary);
        }

        .site-navbar .nav-link:hover::after,
        .site-navbar .nav-link.active::after {
            transform: scaleX(1);
        }

        .site-navbar .nav-link.active {
            color: var(--primary);
            background: rgba(61, 220, 151, .07);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(61, 220, 151, .6);
            color: var(--primary);
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .nav-cta:hover {
            background: var(--primary);
            color: var(--on-primary);
            border-color: var(--primary);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, .22);
            color: #dfe7ee;
            border-radius: var(--radius-sm);
            font-size: 1.25rem;
            padding: 6px 12px;
            background: transparent;
            transition: all var(--transition);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(61, 220, 151, .18);
        }

        .page-hero {
            position: relative;
            min-height: 470px;
            display: flex;
            align-items: center;
            padding: 110px 0 128px;
            background:
                linear-gradient(105deg, rgba(10, 14, 18, .98) 0%, rgba(11, 15, 20, .85) 44%, rgba(13, 20, 26, .6) 100%),
                url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            overflow: hidden;
        }

        .page-hero .container {
            position: relative;
            z-index: 3;
        }

        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-bottom: 42px;
            color: var(--muted);
            font-size: 13px;
            letter-spacing: .01em;
        }

        .breadcrumb-custom a {
            color: #A7B6C2;
            text-decoration: none;
        }

        .breadcrumb-custom a:hover {
            color: var(--primary);
        }

        .breadcrumb-custom .sep {
            opacity: .5;
            font-size: 12px;
        }

        .breadcrumb-custom .crumb-current {
            color: #D7E0E7;
            font-weight: 500;
        }

        .hero-content {
            max-width: 860px;
        }

        .hero-content h1 {
            color: #fff;
            margin-bottom: 18px;
        }

        .hero-content h1 .hero-accent {
            color: var(--primary);
        }

        .hero-lead {
            font-size: 1.12rem;
            color: #CDD6DE;
            max-width: 680px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 34px;
        }

        .hero-scroll {
            position: absolute;
            right: 32px;
            bottom: 28px;
            z-index: 2;
        }

        .hero-scroll a {
            width: 42px;
            height: 42px;
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #D2DBE3;
            transition: all var(--transition);
        }

        .hero-scroll a:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(4px);
        }

        .observe-scope {
            margin-top: -72px;
            position: relative;
            z-index: 5;
        }

        .metric-wrap {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: clamp(24px, 4vw, 44px);
            box-shadow: 0 24px 70px rgba(0, 0, 0, .36);
        }

        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }

        .metric-item {
            border-left: 1px solid rgba(255, 255, 255, .1);
            padding-left: 20px;
        }

        .metric-item:first-child {
            border-left: 0;
            padding-left: 0;
        }

        .metric-label {
            font-size: .78rem;
            letter-spacing: .12em;
            font-weight: 600;
            color: var(--muted);
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .metric-text {
            color: var(--primary);
            font-size: 1.35rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -.01em;
            margin-bottom: 7px;
        }

        .metric-note {
            color: var(--muted);
            font-size: .88rem;
            line-height: 1.6;
        }

        .obs-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .obs-card {
            position: relative;
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            padding: 0;
            transition: transform var(--transition), border-color var(--transition), background var(--transition);
        }

        .obs-card:hover {
            transform: translateY(-6px);
            border-color: rgba(61, 220, 151, .35);
            background: var(--panel-hover);
            box-shadow: var(--shadow-lg);
        }

        .obs-cover {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

        .obs-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 500ms cubic-bezier(.2, .7, .3, 1);
        }

        .obs-card:hover .obs-cover img {
            transform: scale(1.04);
        }

        .obs-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11, 15, 20, .6), transparent 62%);
        }

        .obs-tag {
            position: absolute;
            left: 16px;
            bottom: 14px;
            z-index: 2;
            background: rgba(6, 14, 10, .72);
            border: 1px solid rgba(61, 220, 151, .4);
            color: #B7F2D4;
            font-size: .72rem;
            font-weight: 600;
            letter-spacing: .08em;
            padding: 5px 12px;
            border-radius: 999px;
            backdrop-filter: blur(6px);
        }

        .obs-body {
            padding: 26px 24px 28px;
        }

        .obs-body h3 {
            margin-bottom: 10px;
            color: #F2F6F9;
        }

        .obs-body p {
            color: var(--muted);
            font-size: .94rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .chips-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .chip {
            font-size: .76rem;
            color: #B7C3CC;
            background: rgba(255, 255, 255, .045);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 999px;
            padding: 4px 11px;
        }

        .how-block {
            background: var(--panel);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
            padding-top: clamp(64px, 9vw, 110px);
            padding-bottom: clamp(64px, 9vw, 110px);
            margin-top: clamp(64px, 9vw, 112px);
        }

        .how-band {
            position: relative;
        }

        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            counter-reset: step;
        }

        .step-card {
            position: relative;
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 28px 24px 24px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .step-card:hover {
            border-color: rgba(61, 220, 151, .25);
            transform: translateY(-3px);
        }

        .step-index {
            display: block;
            font-size: .82rem;
            letter-spacing: .12em;
            color: var(--accent);
            font-weight: 700;
            margin-bottom: 14px;
        }

        .step-card h3 {
            font-size: 1.02rem;
            margin-bottom: 8px;
            color: #F2F6F9;
        }

        .step-card p {
            color: var(--muted);
            font-size: .88rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .track-list {
            border: 1px solid var(--line);
            background: var(--panel);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .track-row {
            position: relative;
            display: grid;
            grid-template-columns: 76px minmax(0, 1fr) 130px 40px;
            align-items: center;
            gap: 20px;
            padding: 24px 28px;
            color: inherit;
            text-decoration: none;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
            transition: background var(--transition), padding-left var(--transition);
        }

        .track-row:last-child {
            border-bottom: 0;
        }

        .track-row:hover {
            background: rgba(255, 255, 255, .03);
            padding-left: 34px;
        }

        .track-index {
            font-weight: 800;
            font-size: 1.15rem;
            color: var(--accent);
            letter-spacing: -.02em;
            opacity: .9;
        }

        .track-title {
            color: #EDF2F7;
            font-weight: 700;
            font-size: 1.03rem;
            margin-bottom: 5px;
        }

        .track-desc {
            color: var(--muted);
            font-size: .88rem;
            line-height: 1.6;
            margin: 0;
        }

        .track-tag {
            justify-self: end;
            font-size: .78rem;
            color: #C7D2DB;
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .09);
            border-radius: 999px;
            padding: 5px 13px;
            white-space: nowrap;
        }

        .track-tag.warm {
            color: var(--accent);
            background: rgba(244, 181, 106, .08);
            border-color: rgba(244, 181, 106, .28);
        }

        .track-tag.green {
            color: var(--primary);
            background: rgba(61, 220, 151, .07);
            border-color: rgba(61, 220, 151, .25);
        }

        .track-arrow {
            width: 34px;
            height: 34px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 50%;
            color: #dfe7ee;
            transition: all var(--transition);
        }

        .track-row:hover .track-arrow {
            background: var(--primary);
            border-color: var(--primary);
            color: var(--on-primary);
        }

        .cross-links {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-top: 38px;
            padding: 22px 26px;
            border: 1px dashed rgba(255, 255, 255, .14);
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, .015);
        }

        .cross-links span {
            color: var(--muted);
            font-size: .9rem;
            margin-right: 6px;
        }

        .cross-link {
            color: #D7E0E7;
            font-size: .9rem;
            border: 1px solid rgba(255, 255, 255, .14);
            border-radius: 999px;
            padding: 6px 15px;
            transition: all var(--transition);
        }

        .cross-link:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(61, 220, 151, .05);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 316px;
            gap: 44px;
            align-items: start;
        }

        .faq-note {
            position: sticky;
            top: 150px;
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 28px 26px;
        }

        .faq-note-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(61, 220, 151, .12);
            color: var(--primary);
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
        }

        .faq-note h4 {
            color: #EDF2F7;
            font-size: 1rem;
            margin-bottom: 10px;
        }

        .faq-note p {
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .faq-note a {
            color: var(--primary);
            border-bottom: 1px solid rgba(61, 220, 151, .4);
        }

        .accordion.faq-accordion {
            --bs-accordion-bg: transparent;
            --bs-accordion-border-color: var(--line);
            --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(61, 220, 151, .15);
            --bs-accordion-active-color: var(--primary);
            --bs-accordion-active-bg: rgba(61, 220, 151, .06);
        }

        .faq-accordion .accordion-item {
            background: var(--panel);
            border: 1px solid var(--line);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
        }

        .faq-accordion .accordion-button {
            background: var(--panel);
            color: var(--text);
            font-size: 1rem;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none;
            line-height: 1.5;
            border-radius: 0;
        }

        .faq-accordion .accordion-button:hover {
            color: var(--primary);
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(61, 220, 151, .06);
            color: var(--primary);
            border-bottom: 1px solid var(--line);
        }

        .faq-accordion .accordion-button::after {
            filter: invert(1);
            opacity: .7;
        }

        .faq-accordion .accordion-body {
            background: var(--panel);
            color: var(--muted);
            padding: 18px 24px 22px;
            font-size: .94rem;
            line-height: 1.8;
        }

        .cta-band {
            position: relative;
            padding: clamp(72px, 10vw, 120px) 0;
            background:
                linear-gradient(135deg, rgba(11, 15, 20, .96), rgba(11, 15, 20, .78)),
                url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            border-top: 1px solid rgba(61, 220, 151, .16);
            text-align: center;
        }

        .cta-inner {
            max-width: 760px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            color: #F4F8FA;
            margin-bottom: 16px;
        }

        .cta-inner p {
            color: #AEBECC;
            margin-bottom: 34px;
            font-size: 1.05rem;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .site-footer {
            background: #070a0e;
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding-top: 76px;
            color: #8899A7;
            font-size: .9rem;
        }

        .site-footer .brand-logo {
            margin-bottom: 18px;
        }

        .footer-brand-desc {
            color: #889BA9;
            font-size: .92rem;
            line-height: 1.8;
            margin-bottom: 18px;
            max-width: 360px;
        }

        .chips {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: rgba(255, 255, 255, .045);
            border: 1px solid rgba(255, 255, 255, .09);
            color: #C3D0DA;
            border-radius: 999px;
            padding: 6px 13px;
            font-size: .78rem;
        }

        .chips i {
            color: var(--primary);
            font-size: .78rem;
        }

        .footer-title {
            color: #E7EEF4;
            font-size: .95rem;
            font-weight: 600;
            letter-spacing: .02em;
            margin-bottom: 18px;
            padding-bottom: 2px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-links li,
        .footer-contact-list li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #8B9DAB;
            text-decoration: none;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-links a i {
            font-size: .66rem;
            margin-right: 8px;
            color: rgba(255, 255, 255, .4);
        }

        .footer-contact-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-contact-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 14px;
            color: #B4C4D0;
        }

        .footer-contact-list i {
            color: var(--primary);
            margin-top: 5px;
            font-size: .88rem;
            width: 16px;
            text-align: center;
        }

        .footer-contact-list a {
            color: #C3D0DA;
            text-decoration: none;
        }

        .footer-contact-list a:hover {
            color: var(--primary);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
            padding: 22px 0;
            border-top: 1px solid rgba(255, 255, 255, .07);
            margin-top: 42px;
            color: #647784;
            font-size: .8rem;
        }

        .footer-bottom a {
            color: #8C9DAB;
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        .footer-bottom .footer-bottom-links {
            display: flex;
            gap: 16px;
        }

        @media (max-width: 1199.98px) {
            .metric-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 22px;
            }

            .metric-item {
                border-left: 0;
                padding-left: 0;
                border-top: 1px solid rgba(255, 255, 255, .07);
                padding-top: 16px;
            }

            .metric-item:nth-child(-n+2) {
                border-top: 0;
                padding-top: 0;
            }

            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .faq-layout {
                grid-template-columns: 1fr;
            }

            .faq-note {
                top: auto;
            }
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                margin-top: 18px;
                background: #10161d;
                border: 1px solid rgba(255, 255, 255, .1);
                border-radius: var(--radius-md);
                padding: 14px;
            }

            .navbar-nav {
                gap: 6px;
                margin: 0 0 12px;
                width: 100%;
            }

            .site-navbar .nav-link {
                border-radius: 8px;
                padding: 8px 12px;
                white-space: normal;
            }

            .site-navbar .nav-link::after {
                left: 12px;
                right: auto;
                width: 42px;
                bottom: 2px;
            }

            .navbar-nav-wrapper {
                width: 100%;
            }

            .nav-cta {
                width: 100%;
                justify-content: center;
            }

            .obs-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .track-row {
                grid-template-columns: 56px minmax(0, 1fr) auto;
            }

            .track-tag {
                display: none;
            }

            .page-hero {
                min-height: 420px;
                padding: 90px 0 116px;
            }

            .hero-scroll {
                display: none;
            }
        }

        @media (max-width: 767.98px) {
            .topbar-inner .topbar-msg {
                display: none;
            }

            .metric-grid {
                grid-template-columns: 1fr;
            }

            .metric-item,
            .metric-item:nth-child(-n+2) {
                border-top: 1px solid rgba(255, 255, 255, .07);
                padding: 18px 0 0;
            }

            .obs-grid {
                grid-template-columns: 1fr;
            }

            .step-grid {
                grid-template-columns: 1fr;
            }

            .track-row {
                grid-template-columns: 42px minmax(0, 1fr) 26px;
                gap: 10px;
                padding: 20px 16px;
            }

            .track-row:hover {
                padding-left: 20px;
            }

            .track-index {
                font-size: .92rem;
            }

            .track-arrow {
                width: 28px;
                height: 28px;
            }

            .hero-actions .pg-btn {
                width: 100%;
            }

            .breadcrumb-custom {
                margin-bottom: 30px;
                font-size: 12px;
            }

            .hero-lead {
                font-size: 1rem;
            }

            .section-head p {
                font-size: .95rem;
            }

            .faq-note {
                padding: 22px 18px;
            }

            .faq-accordion .accordion-button {
                padding: 16px 18px;
                font-size: .94rem;
            }

            .faq-accordion .accordion-body {
                padding: 14px 18px 18px;
            }

            .cross-links {
                gap: 10px;
                padding: 18px 14px;
            }

            .cross-links span {
                width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
            }

            .footer-bottom-links {
                justify-content: center;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .page-hero .container {
                padding-left: 18px;
                padding-right: 18px;
            }

            .topbar-inner {
                font-size: 11px;
            }

            .topbar-domain {
                letter-spacing: -.02em;
            }

            .logo-badge {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }

            .logo-text {
                font-size: 1.15rem;
            }

            .page-hero {
                padding: 74px 0 90px;
                min-height: 390px;
            }

            .breadcrumb-custom {
                margin-bottom: 22px;
            }

            .obs-cover {
                height: 176px;
            }

            .track-desc {
                display: none;
            }

            .track-title {
                margin-bottom: 0;
                font-size: .95rem;
            }

            .track-row {
                padding-top: 14px;
                padding-bottom: 14px;
            }

            .metric-wrap {
                padding: 24px 18px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }

            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
        }