/* roulang page: index */
:root {
    --primary: #e63946;
    --primary-dark: #c1121f;
    --primary-light: #ff6b6b;
    --accent: #ffb703;
    --bg: #0d0f14;
    --bg-soft: #141822;
    --card: #181c28;
    --card-hover: #1f2434;
    --text: #f5f6fa;
    --text-weak: #9aa3b2;
    --border: #252b3a;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --shadow: 0 12px 36px rgba(0, 0, 0, .35);
    --shadow-hover: 0 18px 48px rgba(0, 0, 0, .5);
    --transition: all .3s ease;
    --font-main: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; color: inherit; }
.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 90px 0; }
.section + .section { border-top: 1px solid rgba(255, 255, 255, .04); }
.text-center { text-align: center; }
.section-header { max-width: 680px; margin: 0 auto 54px; text-align: center; }
.section-eyebrow {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 100px;
    background: rgba(230, 57, 70, .12);
    color: var(--primary-light);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: .5px;
    margin-bottom: 18px;
    border: 1px solid rgba(230, 57, 70, .25);
}
.section-title { font-size: 38px; font-weight: 800; line-height: 1.25; letter-spacing: .5px; }
.section-sub { font-size: 17px; color: var(--text-weak); margin-top: 16px; }
@media (max-width: 768px) {
    .section { padding: 60px 0; }
    .section-title { font-size: 28px; }
    .section-sub { font-size: 15px; }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: 100px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    box-shadow: 0 8px 24px rgba(230, 57, 70, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(230, 57, 70, .5); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 16px rgba(230, 57, 70, .3); }
.btn-ghost {
    background: rgba(255, 255, 255, .08);
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, .2);
    backdrop-filter: blur(12px);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .35); transform: translateY(-2px); }
.btn-ghost:active { transform: translateY(0); }
.btn-lg { padding: 17px 40px; font-size: 17px; }
.btn:focus-visible { outline: 3px solid rgba(230, 57, 70, .5); outline-offset: 3px; }

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 15, 20, .82);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    transition: background .3s ease;
}
.site-header.scrolled { background: rgba(13, 15, 20, .95); }
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 74px;
}
.logo {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: .5px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary-light);
    box-shadow: 0 0 16px rgba(230, 57, 70, .8);
}
.main-nav { display: flex; align-items: center; }
.main-nav ul { display: flex; gap: 4px; margin: 0; padding: 0; }
.main-nav a {
    display: block;
    padding: 10px 16px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-weak);
    transition: var(--transition);
    position: relative;
}
.main-nav a:hover { color: var(--text); background: rgba(255, 255, 255, .06); }
.main-nav a.active { color: #fff; background: var(--primary); box-shadow: 0 4px 14px rgba(230, 57, 70, .35); }
.nav-cta { display: inline-flex; margin-left: 16px; }
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 6px; padding: 10px; border-radius: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }
@media (max-width: 1024px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: fixed;
        top: 74px;
        left: 0;
        width: 100%;
        background: rgba(13, 15, 20, .98);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, .06);
        max-height: 0;
        overflow: hidden;
        transition: max-height .4s ease;
        display: block;
    }
    .main-nav.open { max-height: 480px; }
    .main-nav ul { flex-direction: column; gap: 0; padding: 16px 24px 24px; }
    .main-nav a { padding: 14px 16px; font-size: 16px; border-radius: 12px; }
    .nav-cta { display: none; }
}
@media (max-width: 520px) {
    .logo { font-size: 18px; }
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 160px 24px 100px;
    background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(13, 15, 20, .65) 0%, rgba(13, 15, 20, .75) 50%, rgba(13, 15, 20, .95) 100%);
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 400px;
    background: radial-gradient(ellipse at center, rgba(230, 57, 70, .25) 0%, transparent 70%);
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    text-align: center;
    animation: fadeInUp 0.8s ease both;
}
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    border-radius: 100px;
    background: rgba(255, 255, 255, .1);
    border: 1px solid rgba(255, 255, 255, .18);
    backdrop-filter: blur(8px);
    font-size: 14px;
    color: var(--text);
    margin-bottom: 28px;
}
.hero-badge i {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #2ecc71;
    box-shadow: 0 0 12px rgba(46, 204, 113, .8);
    animation: pulse 1.5s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: .5; transform: scale(1.4); } }
.hero h1 {
    font-size: 58px;
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: 1px;
    color: #fff;
    text-shadow: 0 4px 30px rgba(0, 0, 0, .5);
    margin-bottom: 22px;
}
.hero h1 span {
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, .85);
    line-height: 1.9;
    max-width: 620px;
    margin: 0 auto 36px;
    font-weight: 400;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-stats {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 780px;
    margin: 65px auto 0;
    padding: 32px 40px;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(16px);
}
.hero-stat { text-align: center; }
.hero-stat strong { display: block; font-size: 32px; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stat strong em { font-style: normal; font-size: 20px; color: var(--primary-light); }
.hero-stat span { font-size: 14px; color: rgba(255, 255, 255, .7); margin-top: 4px; }
@media (max-width: 1024px) {
    .hero { padding: 140px 24px 80px; }
    .hero h1 { font-size: 46px; }
}
@media (max-width: 768px) {
    .hero { padding: 130px 16px 60px; }
    .hero h1 { font-size: 36px; }
    .hero-desc { font-size: 16px; }
    .hero-stats { grid-template-columns: 2fr 2fr; gap: 16px; padding: 24px 20px; margin-top: 48px; }
    .hero-stat strong { font-size: 24px; }
}
@media (max-width: 520px) {
    .hero h1 { font-size: 30px; }
    .hero-desc { font-size: 14px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .hero-actions .btn { min-width: 220px; }
}

/* Category cards */
.cat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.cat-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--card);
    border: 1px solid var(--border);
    transition: var(--transition);
    display: block;
    min-height: 320px;
}
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: rgba(230, 57, 70, .4); }
.cat-card-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.cat-card:hover .cat-card-bg { transform: scale(1.08); }
.cat-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 20%, rgba(13, 15, 20, .75) 60%, rgba(13, 15, 20, .95) 100%);
}
.cat-card-body { position: absolute; bottom: 0; left: 0; right: 0; padding: 28px; z-index: 2; }
.cat-card-body h3 { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.cat-card-body p { font-size: 14px; color: rgba(255, 255, 255, .8); margin-bottom: 14px; line-height: 1.6; }
.cat-card-tag {
    display: inline-block;
    padding: 5px 14px;
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    background: rgba(230, 57, 70, .9);
    color: #fff;
}
@media (max-width: 1024px) {
    .cat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
    .cat-grid { grid-template-columns: 1fr; }
}

/* Post list */
.post-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.post-card {
    display: flex;
    gap: 20px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 18px;
    transition: var(--transition);
    align-items: flex-start;
}
.post-card:hover { background: var(--card-hover); transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: rgba(230, 57, 70, .3); }
.post-thumb {
    width: 160px;
    height: 110px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    flex-shrink: 0;
    background: var(--bg-soft);
}
.post-info { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.post-info .post-cat { align-self: flex-start; }
.badge {
    display: inline-block;
    padding: 3px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 100px;
    background: rgba(230, 57, 70, .15);
    color: var(--primary-light);
    border: 1px solid rgba(230, 57, 70, .2);
}
.post-title { font-size: 17px; font-weight: 700; line-height: 1.4; color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: color .2s; }
.post-card:hover .post-title { color: var(--primary-light); }
.post-date { font-size: 13px; color: var(--text-weak); }
.empty-note {
    grid-column: 1 / -1;
    text-align: center;
    padding: 50px 0;
    color: var(--text-weak);
    font-size: 15px;
}
@media (max-width: 1024px) {
    .post-grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
    .post-card { flex-direction: column; }
    .post-thumb { width: 100%; height: 200px; }
}

/* Feature cards */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 34px 26px;
    text-align: center;
    transition: var(--transition);
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: rgba(230, 57, 70, .35); }
.feature-icon {
    width: 68px;
    height: 68px;
    margin: 0 auto 20px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 8px 24px rgba(230, 57, 70, .3);
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-weak); line-height: 1.6; }
@media (max-width: 1024px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
    .feature-grid { grid-template-columns: 1fr; }
}

/* Steps */
.steps-wrap {
    position: relative;
    background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
    border-radius: var(--radius-lg);
    padding: 70px 60px;
    overflow: hidden;
    border: 1px solid var(--border);
}
.steps-wrap::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(13, 15, 20, .8);
    backdrop-filter: blur(2px);
}
.steps-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.step-item { text-align: center; padding: 24px; }
.step-num {
    width: 56px;
    height: 56px;
    margin: 0 auto 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    box-shadow: 0 8px 24px rgba(230, 57, 70, .35);
}
.step-item h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: #fff; }
.step-item p { font-size: 14px; color: rgba(255, 255, 255, .75); line-height: 1.6; }
@media (max-width: 1024px) {
    .steps-grid { grid-template-columns: 1fr; }
    .steps-wrap { padding: 50px 30px; }
}

/* Tags */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; max-width: 780px; margin: 0 auto; }
.tag-item {
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 100px;
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--text-weak);
    transition: var(--transition);
}
.tag-item:hover { color: #fff; background: var(--primary); border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(230, 57, 70, .3); }
.tag-item span { font-size: 12px; opacity: .7; margin-left: 4px; }

/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover { border-color: rgba(230, 57, 70, .3); }
.faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 26px;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
    transition: background .2s;
    user-select: none;
}
.faq-q:hover { background: rgba(255, 255, 255, .03); }
.faq-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(230, 57, 70, .15);
    color: var(--primary-light);
    font-size: 18px;
    font-weight: 600;
    flex-shrink: 0;
    transition: transform .3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s ease;
}
.faq-a-inner { padding: 0 26px 22px; font-size: 15px; color: var(--text-weak); line-height: 1.8; }

/* CTA */
.cta-section {
    position: relative;
    padding: 100px 0;
    background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
    overflow: hidden;
    text-align: center;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13, 15, 20, .88), rgba(230, 57, 70, .4), rgba(13, 15, 20, .92));
}
.cta-box { position: relative; z-index: 2; max-width: 720px; margin: 0 auto; }
.cta-box h2 { font-size: 40px; font-weight: 900; letter-spacing: 1px; margin-bottom: 16px; }
.cta-box h2 span { background: linear-gradient(135deg, var(--primary-light), var(--accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.cta-box p { font-size: 17px; color: rgba(255, 255, 255, .8); margin-bottom: 36px; line-height: 1.8; }
@media (max-width: 768px) {
    .cta-box h2 { font-size: 30px; }
    .cta-box p { font-size: 15px; }
}

/* Footer */
.site-footer {
    background: #090b10;
    border-top: 1px solid rgba(255, 255, 255, .06);
    padding: 60px 0 28px;
}
.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 44px;
    border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.footer-brand .logo { font-size: 20px; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-weak); line-height: 1.7; max-width: 300px; }
.footer-heading { font-size: 16px; font-weight: 700; margin-bottom: 18px; color: #fff; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: var(--text-weak); transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--text-weak);
}
.footer-bottom p { line-height: 1.6; }
@media (max-width: 1024px) {
    .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 620px) {
    .footer-top { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

/* Utility */
.divider {
    width: 60px;
    height: 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    margin: 16px auto 0;
}
.fade-section { opacity: 0; transform: translateY(30px); transition: opacity .6s ease, transform .6s ease; }
.fade-section.visible { opacity: 1; transform: translateY(0); }

/* roulang page: article */
:root {
            --bg: #0e0e13;
            --bg-soft: #15151c;
            --card: #1b1b23;
            --card-hover: #232330;
            --primary: #ff3d5a;
            --primary-soft: rgba(255, 61, 90, 0.12);
            --accent: #ff6b3d;
            --text: #f4f2f6;
            --text-weak: #9a98a5;
            --border: #2a2a36;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
            --shadow-hover: 0 18px 50px rgba(255, 61, 90, 0.15);
            --space: clamp(24px, 5vw, 64px);
            --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s;
        }

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

        button,
        input {
            font-family: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            width: min(1160px, 92%);
            margin: 0 auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: none;
            border-radius: 999px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            letter-spacing: 0.02em;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 8px 24px rgba(255, 61, 90, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(255, 61, 90, 0.45);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .badge {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            border: 1px solid rgba(255, 61, 90, 0.3);
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(14, 14, 19, 0.88);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            height: 70px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            white-space: nowrap;
        }

        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 0 4px rgba(255, 61, 90, 0.2);
        }

        .main-nav ul {
            display: flex;
            gap: 4px;
            margin: 0;
        }

        .main-nav li a {
            display: block;
            padding: 8px 14px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-weak);
        }

        .main-nav li a:hover,
        .main-nav li a.active {
            color: var(--text);
            background: var(--primary-soft);
        }

        .nav-cta {
            margin-left: auto;
            padding: 10px 22px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all 0.3s;
        }

        @media (max-width: 1024px) {
            .nav-wrap {
                gap: 16px;
            }

            .main-nav ul {
                gap: 0;
            }

            .main-nav li a {
                padding: 8px 10px;
                font-size: 13px;
            }

            .nav-cta {
                display: none;
            }
        }

        @media (max-width: 820px) {
            .nav-wrap {
                height: auto;
                flex-wrap: wrap;
                padding: 14px 0;
            }

            .nav-toggle {
                display: flex;
                margin-left: auto;
            }

            .main-nav {
                flex-basis: 100%;
                display: none;
                padding-top: 12px;
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                gap: 6px;
            }

            .main-nav li a {
                display: block;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                display: inline-flex;
                margin-left: 0;
                margin-top: 4px;
                padding: 9px 18px;
                font-size: 14px;
            }
        }

        /* Article Banner */
        .article-banner {
            position: relative;
            padding: calc(var(--space) * 1.2) 0 calc(var(--space) * 0.8);
            background: linear-gradient(180deg, rgba(14, 14, 19, 0.9), var(--bg)),
                url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            border-bottom: 1px solid var(--border);
            margin-bottom: var(--space);
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 18px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

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

        .breadcrumb-sep {
            margin: 0 2px;
            color: var(--border);
        }

        .article-banner h1 {
            font-size: clamp(26px, 4vw, 42px);
            line-height: 1.3;
            font-weight: 800;
            max-width: 900px;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 14px;
            color: var(--text-weak);
        }

        .article-meta .badge {
            text-transform: uppercase;
        }

        /* Article Body */
        .article-section {
            padding-bottom: var(--space);
        }

        .article-wrap {
            max-width: 860px;
            margin: 0 auto;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: clamp(24px, 4vw, 48px);
            box-shadow: var(--shadow);
        }

        .article-content {
            font-size: 16px;
            color: #d6d4df;
            line-height: 1.9;
        }

        .article-content h2,
        .article-content h3 {
            color: var(--text);
            margin: 1.6em 0 0.8em;
            font-weight: 700;
            line-height: 1.4;
        }

        .article-content h2 {
            font-size: 24px;
            padding-bottom: 10px;
            position: relative;
        }

        .article-content h2::after {
            content: "";
            display: block;
            width: 40px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
            margin-top: 8px;
        }

        .article-content p {
            margin-bottom: 1.2em;
        }

        .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-soft);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text);
            font-style: italic;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 20px;
            padding-left: 22px;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 8px;
        }

        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid rgba(255, 61, 90, 0.3);
        }

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

        .article-empty {
            text-align: center;
            padding: 40px 0;
        }

        .article-empty p {
            font-size: 18px;
            color: var(--text-weak);
            margin-bottom: 20px;
        }

        /* Feature Strip */
        .feature-strip {
            padding: calc(var(--space) * 0.8) 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            background: var(--bg-soft);
            margin-bottom: var(--space);
        }

        .section-title {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            color: var(--text-weak);
            font-size: 15px;
            max-width: 640px;
            margin-bottom: 36px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .feature-item {
            background: var(--card);
            border-radius: var(--radius);
            padding: 28px 22px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
            text-align: center;
        }

        .feature-item:hover {
            border-color: rgba(255, 61, 90, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            background: var(--primary-soft);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }

        .feature-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .feature-item p {
            font-size: 14px;
            color: var(--text-weak);
        }

        /* Related */
        .related-section {
            padding-bottom: var(--space);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }

        .related-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 61, 90, 0.4);
            box-shadow: var(--shadow-hover);
        }

        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            transition: transform 0.4s;
        }

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

        .related-card-body {
            padding: 18px;
        }

        .related-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .related-card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.5;
        }

        /* FAQ */
        .faq-section {
            padding: calc(var(--space) * 0.8) 0;
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            margin-bottom: var(--space);
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.25s;
        }

        .faq-question {
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }

        .faq-question::after {
            content: "+";
            font-size: 22px;
            color: var(--primary);
            transition: transform 0.3s;
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 18px;
        }

        .faq-answer p {
            font-size: 14.5px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            padding: calc(var(--space) * 0.6) 0 var(--space);
            text-align: center;
        }

        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(255, 61, 90, 0.2), rgba(255, 107, 61, 0.1)),
                var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: 26px;
            padding: clamp(36px, 6vw, 64px) clamp(20px, 4vw, 56px);
            overflow: hidden;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.18;
            pointer-events: none;
        }

        .cta-banner > * {
            position: relative;
        }

        .cta-banner h2 {
            font-size: clamp(24px, 4vw, 36px);
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-banner p {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 520px;
            margin: 0 auto 30px;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding: calc(var(--space) * 0.6) 0 24px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .logo {
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-heading {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }

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

        .footer-links a {
            font-size: 14px;
            color: var(--text-weak);
            transition: color 0.25s;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-weak);
        }

        @media (max-width: 820px) {
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

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

        /* Focus & Accessibility */
        :focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* Animations */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .article-wrap,
        .feature-grid,
        .related-grid {
            animation: fadeUp 0.6s ease both;
        }

/* roulang page: category1 */
:root {
            --primary: #e8315b;
            --primary-dark: #c91e47;
            --primary-light: #ff6b8a;
            --accent: #8b5cf6;
            --accent-light: #a78bfa;
            --bg-dark: #0f0a14;
            --bg-body: #17101f;
            --bg-card: #1f1628;
            --bg-elevated: #291d33;
            --bg-soft: rgba(232, 49, 91, 0.08);
            --text-main: #f5eef7;
            --text-strong: #ffffff;
            --text-weak: #a392b0;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-lg: 0 16px 50px rgba(0, 0, 0, 0.45);
            --transition: all 0.3s ease;
            --container-width: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(15, 10, 20, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 0;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            height: 72px;
            gap: 32px;
        }

        .logo {
            display: flex;
            align-items: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-strong);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }

        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            margin-right: 10px;
            box-shadow: 0 0 12px rgba(232, 49, 91, 0.8);
            flex-shrink: 0;
        }

        .main-nav {
            flex: 1;
            display: flex;
            justify-content: center;
        }

        .main-nav ul {
            display: flex;
            gap: 6px;
        }

        .main-nav a {
            display: block;
            padding: 8px 16px;
            font-size: 15px;
            color: var(--text-main);
            border-radius: 50px;
            font-weight: 500;
            transition: var(--transition);
        }

        .main-nav a:hover {
            color: var(--text-strong);
            background: var(--bg-soft);
        }

        .main-nav a.active {
            color: var(--text-strong);
            background: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 50px;
            background: var(--primary);
            color: #fff !important;
            box-shadow: 0 4px 15px rgba(232, 49, 91, 0.35);
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(232, 49, 91, 0.5);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            border-radius: 8px;
            border: 1px solid var(--border-subtle);
            background: var(--bg-card);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
            border: none;
            line-height: 1.4;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff !important;
            box-shadow: 0 6px 20px rgba(232, 49, 91, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 49, 91, 0.55);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-strong) !important;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
        }

        .btn-outline:hover {
            border-color: var(--primary-light);
            color: var(--primary-light) !important;
            background: var(--bg-soft);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 16px 42px;
            font-size: 17px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }

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

        /* ===== Hero ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, rgba(15, 10, 20, 0.96), rgba(40, 20, 40, 0.88)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(232, 49, 91, 0.2), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-soft);
            border: 1px solid rgba(232, 49, 91, 0.3);
            color: var(--primary-light);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            color: var(--text-strong);
            margin-bottom: 20px;
            letter-spacing: -1px;
        }

        .hero-title .gradient-text {
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-main);
            max-width: 640px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
        }

        .stat-item {
            display: flex;
            flex-direction: column;
        }

        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-strong);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-top: 4px;
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--bg-dark);
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-block;
            background: var(--bg-soft);
            border-radius: 50px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-light);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .section-title {
            font-size: 38px;
            font-weight: 800;
            color: var(--text-strong);
            margin-bottom: 16px;
            line-height: 1.25;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.8;
        }

        /* ===== Cards / Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(232, 49, 91, 0.35);
            box-shadow: var(--shadow-md);
            background: var(--bg-elevated);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(232, 49, 91, 0.2), rgba(139, 92, 246, 0.2));
            margin-bottom: 20px;
            font-size: 26px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        .video-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
        }

        .video-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(232, 49, 91, 0.4);
        }

        .video-cover {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .video-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .video-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.65), transparent 60%);
            display: flex;
            align-items: flex-end;
            padding: 14px;
        }

        .video-tag {
            display: inline-block;
            background: rgba(232, 49, 91, 0.9);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 50px;
        }

        .video-info {
            padding: 18px;
        }

        .video-info h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-strong);
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .video-meta {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-weak);
        }

        /* ===== Scene Section ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            align-items: center;
        }

        .scene-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
            height: 100%;
            min-height: 360px;
        }

        .scene-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .scene-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-strong);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .scene-content p {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .scene-points {
            margin-bottom: 28px;
        }

        .scene-points li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.6;
        }

        .scene-points li::before {
            content: '✓';
            display: flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--bg-soft);
            color: var(--primary-light);
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            position: relative;
            border: 1px solid var(--border-subtle);
            transition: var(--transition);
            text-align: center;
        }

        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(139, 92, 246, 0.35);
        }

        .step-number {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-strong);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 50%;
            box-shadow: 0 4px 15px rgba(232, 49, 91, 0.3);
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== Tag cloud ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .tag-item {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            font-size: 14px;
            color: var(--text-main);
            transition: var(--transition);
        }

        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: var(--bg-soft);
            transform: translateY(-2px);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(232, 49, 91, 0.3);
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-strong);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            user-select: none;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--primary-light);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(232, 49, 91, 0.12), rgba(139, 92, 246, 0.12)), var(--bg-dark);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(232, 49, 91, 0.12), transparent 70%);
            border-radius: 50%;
        }

        .cta-inner {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-strong);
            margin-bottom: 16px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-weak);
            margin-bottom: 32px;
            line-height: 1.8;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-subtle);
            padding: 64px 0 30px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .footer-brand .logo {
            margin-bottom: 14px;
            font-size: 18px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
        }

        .footer-heading {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 16px;
        }

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

        .footer-links a {
            font-size: 14px;
            color: var(--text-weak);
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-weak);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .footer-top {
                grid-template-columns: 1fr 1fr;
            }

            .hero-title {
                font-size: 42px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrap {
                height: auto;
                padding: 14px 20px;
                flex-wrap: wrap;
                position: relative;
            }

            .nav-toggle {
                display: flex;
                margin-left: auto;
            }

            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--bg-card);
                border-radius: var(--radius-md);
                margin-top: 12px;
                padding: 12px;
                border: 1px solid var(--border-subtle);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav ul {
                flex-direction: column;
                width: 100%;
                gap: 4px;
            }

            .main-nav a {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                display: none;
            }

            .category-hero {
                padding: 70px 0 60px;
            }

            .hero-title {
                font-size: 34px;
            }

            .hero-desc {
                font-size: 16px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-stats {
                gap: 24px;
            }

            .grid-3 {
                grid-template-columns: 1fr;
            }

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

            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 30px;
            }

            .cta-inner h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 520px) {
            .grid-4 {
                grid-template-columns: 1fr;
            }

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

            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

            .hero-title {
                font-size: 28px;
            }

            .stat-number {
                font-size: 28px;
            }

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }

            .category-hero::before,
            .category-hero::after {
                display: none;
            }

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

        /* ===== Focus states ===== */
        a:focus-visible {
            outline: 3px solid var(--accent-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .video-card:focus-within {
            box-shadow: var(--shadow-md);
        }

/* roulang page: category5 */
:root {
            --primary: #ff3b5c;
            --primary-hover: #ff5c78;
            --primary-soft: rgba(255, 59, 92, 0.16);
            --accent: #7c5cff;
            --accent-soft: rgba(124, 92, 255, 0.15);
            --bg: #0b0b14;
            --bg-card: #161625;
            --bg-soft: #1d1d30;
            --bg-deep: #07070c;
            --text: #f0f0f5;
            --text-weak: #9d9dbb;
            --border: rgba(255, 255, 255, 0.08);
            --radius: 16px;
            --radius-lg: 24px;
            --shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
            --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.25);
            --container: 1200px;
            --transition: all 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 11, 20, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 32px;
            min-height: 72px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--text);
            white-space: nowrap;
        }

        .logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 16px rgba(255, 59, 92, 0.7);
            flex-shrink: 0;
        }

        .main-nav {
            flex: 1;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            transition: var(--transition);
        }

        .main-nav a:hover {
            color: var(--text);
            background: var(--bg-soft);
        }

        .main-nav a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 6px 20px rgba(255, 59, 92, 0.35);
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 42px;
            height: 42px;
            justify-content: center;
            align-items: center;
            background: var(--bg-soft);
            border-radius: 12px;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 100px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 24px rgba(255, 59, 92, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 59, 92, 0.4);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text);
            border-color: var(--border);
            backdrop-filter: blur(8px);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 15px 40px;
            font-size: 17px;
        }

        .btn:active {
            transform: scale(0.97);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary-soft);
            color: var(--primary-hover);
            border: 1px solid rgba(255, 59, 92, 0.3);
        }

        .badge-glow {
            box-shadow: 0 0 24px rgba(255, 59, 92, 0.2);
        }

        .hero {
            position: relative;
            padding: 130px 0 120px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 11, 20, 0.65) 0%, rgba(11, 11, 20, 0.82) 55%, var(--bg) 100%);
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
        }

        .hero .badge {
            margin-bottom: 22px;
        }

        .hero h1 {
            font-size: clamp(38px, 5.5vw, 62px);
            font-weight: 900;
            line-height: 1.25;
            margin: 0 0 20px;
            letter-spacing: 0.01em;
        }

        .gradient-text {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero-lead {
            font-size: 18px;
            color: rgba(240, 240, 245, 0.75);
            margin: 0 auto 32px;
            max-width: 600px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 56px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            padding-top: 40px;
            border-top: 1px solid var(--border);
        }

        .hero-stats div {
            text-align: center;
            padding: 12px;
        }

        .hero-stats strong {
            display: block;
            font-size: 30px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 2px;
        }

        .hero-stats span {
            font-size: 14px;
            color: var(--text-weak);
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            background: var(--accent-soft);
            color: #b9a6ff;
            border: 1px solid rgba(124, 92, 255, 0.3);
            margin-bottom: 14px;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-head h2 {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 800;
            margin: 0 0 12px;
            letter-spacing: 0.01em;
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 16px;
            margin: 0;
        }

        .features,
        .new-releases,
        .process,
        .testimonials,
        .faq,
        .cta-section {
            padding: 100px 0;
        }

        .features {
            background: var(--bg-deep);
            position: relative;
            overflow: hidden;
        }

        .features::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -120px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(124, 92, 255, 0.2), transparent 70%);
            pointer-events: none;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 59, 92, 0.35);
            box-shadow: var(--shadow);
        }

        .feature-card:hover::after {
            opacity: 1;
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            background: var(--primary-soft);
            font-size: 26px;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-weak);
            margin: 0;
            line-height: 1.7;
        }

        .new-releases {
            background: var(--bg);
        }

        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .content-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .content-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
            border-color: rgba(255, 255, 255, 0.14);
        }

        .card-media {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .content-card:hover .card-media img {
            transform: scale(1.06);
        }

        .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 100px;
            box-shadow: 0 4px 12px rgba(255, 59, 92, 0.4);
        }

        .card-duration {
            position: absolute;
            bottom: 12px;
            right: 12px;
            background: rgba(0, 0, 0, 0.8);
            color: #fff;
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 6px;
            font-weight: 600;
        }

        .card-body {
            padding: 20px 22px 22px;
        }

        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 10px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 14px;
        }

        .card-tags span {
            font-size: 12px;
            padding: 3px 10px;
            border-radius: 100px;
            background: var(--bg-soft);
            color: var(--text-weak);
            border: 1px solid var(--border);
        }

        .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-weak);
        }

        .rating {
            color: #ffc861;
            font-weight: 700;
        }

        .process {
            background: var(--bg-deep);
            position: relative;
            overflow: hidden;
        }

        .process::after {
            content: "";
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 59, 92, 0.12), transparent 70%);
            pointer-events: none;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
            z-index: 2;
        }

        .process-step {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 44px 32px;
            transition: var(--transition);
            text-align: center;
        }

        .process-step:hover {
            transform: translateY(-6px);
            border-color: rgba(124, 92, 255, 0.3);
            box-shadow: var(--shadow);
        }

        .step-num {
            width: 58px;
            height: 58px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 8px 24px rgba(255, 59, 92, 0.3);
        }

        .process-step h3 {
            font-size: 19px;
            font-weight: 700;
            margin: 0 0 10px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            margin: 0;
        }

        .testimonials {
            background: var(--bg);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: var(--transition);
        }

        .testimonial-card:hover {
            border-color: rgba(255, 59, 92, 0.3);
            box-shadow: var(--shadow-sm);
            transform: translateY(-4px);
        }

        .testimonial-stars {
            color: #ffc861;
            font-size: 16px;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .testimonial-card blockquote {
            margin: 0 0 20px;
            font-size: 15px;
            line-height: 1.8;
            color: rgba(240, 240, 245, 0.85);
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
        }

        .testimonial-author .author-name {
            font-size: 14px;
            font-weight: 600;
        }

        .testimonial-author .author-info {
            font-size: 12px;
            color: var(--text-weak);
        }

        .faq {
            background: var(--bg-deep);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            background: transparent;
            color: var(--text);
            font-size: 16px;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            transition: var(--transition);
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--primary-soft);
            color: var(--primary-hover);
            font-size: 18px;
            transition: var(--transition);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 28px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 24px;
        }

        .faq-answer p {
            margin: 0;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .cta-section {
            position: relative;
            padding: 110px 0;
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 11, 20, 0.92), rgba(20, 16, 32, 0.85));
            z-index: 1;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: clamp(28px, 3.5vw, 40px);
            font-weight: 800;
            margin: 0 0 16px;
        }

        .cta-inner p {
            font-size: 17px;
            color: rgba(240, 240, 245, 0.8);
            margin: 0 0 32px;
            line-height: 1.7;
        }

        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding: 70px 0 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid var(--border);
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            max-width: 300px;
            margin: 0;
        }

        .footer-heading {
            font-size: 15px;
            font-weight: 700;
            margin: 0 0 16px;
            color: var(--text);
        }

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

        .footer-links a {
            font-size: 14px;
            color: var(--text-weak);
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: var(--text-weak);
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrap {
                gap: 16px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg-card);
                border-bottom: 1px solid var(--border);
                padding: 16px 24px;
                transform: translateY(-16px);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: var(--shadow);
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
            }

            .main-nav a {
                display: block;
                padding: 12px 20px;
                border-radius: 12px;
                font-size: 16px;
            }

            .nav-cta {
                margin-left: auto;
            }

            .hero {
                padding: 90px 0 80px;
            }

            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .features,
            .new-releases,
            .process,
            .testimonials,
            .faq,
            .cta-section {
                padding: 70px 0;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .logo {
                font-size: 17px;
            }

            .hero h1 {
                font-size: 30px;
            }

            .hero-lead {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

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

            .features-grid,
            .content-grid,
            .testimonial-grid {
                grid-template-columns: 1fr;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .section-head h2 {
                font-size: 26px;
            }
        }

/* roulang page: category4 */
:root {
  --primary: #ff2d55;
  --primary-dark: #e0194a;
  --primary-light: #ff6b8a;
  --accent: #ff9500;
  --accent-hover: #e68600;
  --dark: #0f0e14;
  --dark-2: #1a1820;
  --dark-3: #242130;
  --text-main: #f2f2f7;
  --text-body: #c8c5d0;
  --text-weak: #8b8794;
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.14);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.45);
  --shadow-md: 0 12px 35px rgba(0,0,0,0.3);
  --shadow-sm: 0 4px 15px rgba(0,0,0,0.25);
  --gradient: linear-gradient(135deg, #ff2d55 0%, #ff4d6d 45%, #ff9500 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255,45,85,0.16) 0%, rgba(255,149,0,0.08) 100%);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --container: 1200px;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--dark);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
:focus { outline: 2px solid var(--primary-light); outline-offset: 3px; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* 头部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 14, 20, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gradient);
  box-shadow: 0 0 12px rgba(255, 45, 85, 0.6);
  flex-shrink: 0;
}

.main-nav ul {
  display: flex;
  gap: 6px;
  align-items: center;
}

.main-nav a {
  display: block;
  padding: 9px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 999px;
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.07);
}

.main-nav a.active {
  color: #fff;
  background: var(--gradient);
  box-shadow: 0 4px 20px rgba(255, 45, 85, 0.35);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 4px;
  transition: var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

.nav-cta {
  padding: 10px 24px !important;
  font-size: 15px !important;
  white-space: nowrap;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  transition: var(--transition);
  cursor: pointer;
  line-height: 1.4;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 6px 24px rgba(255, 45, 85, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(255, 45, 85, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 16px rgba(255, 45, 85, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-light);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(255, 45, 85, 0.08);
  transform: translateY(-2px);
}

.btn-lg { padding: 15px 40px; font-size: 17px; }
.btn-sm { padding: 8px 20px; font-size: 14px; }

/* 页面 Hero */
.page-hero {
  padding: 90px 0 70px;
  background: linear-gradient(to bottom, rgba(15,14,20,0.92), rgba(15,14,20,0.6)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.page-hero-inner {
  max-width: 760px;
}

.page-hero .tagline {
  display: inline-block;
  background: var(--gradient-soft);
  border: 1px solid rgba(255, 45, 85, 0.25);
  color: var(--primary-light);
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

.page-hero h1 {
  font-size: 42px;
  line-height: 1.22;
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.page-hero h1 em {
  font-style: normal;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-hero p {
  font-size: 17px;
  color: var(--text-body);
  line-height: 1.85;
  margin-bottom: 30px;
}

.page-hero .hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.page-hero .stat-item {
  text-align: left;
}

.page-hero .stat-num {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.page-hero .stat-label {
  font-size: 14px;
  color: var(--text-weak);
  margin-top: 4px;
}

.hero-btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* 通用板块 */
.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-head .section-badge {
  display: inline-block;
  background: var(--gradient-soft);
  border: 1px solid rgba(255, 45, 85, 0.2);
  color: var(--primary-light);
  padding: 5px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-body);
  font-size: 16px;
}

.section-head h2 .txt-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 分类内容卡片 */
.zone-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.zone-card {
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.zone-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 45, 85, 0.4);
  box-shadow: var(--shadow-md);
}

.zone-card-img {
  position: relative;
  height: 172px;
  overflow: hidden;
}

.zone-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.zone-card:hover .zone-card-img img {
  transform: scale(1.08);
}

.zone-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,14,20,0.7) 0%, transparent 50%);
}

.zone-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  background: rgba(255, 45, 85, 0.9);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}

.zone-card-body {
  padding: 16px 18px 20px;
}

.zone-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.zone-card-body p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.65;
}

.zone-card-body .zone-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-weak);
}

/* 图文区块 */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.feature-row:last-child { margin-bottom: 0; }

.feature-row.reverse .feature-text { order: 2; }
.feature-row.reverse .feature-img { order: 1; }

.feature-text h3 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.feature-text h3 .highlight {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.feature-text p {
  color: var(--text-body);
  margin-bottom: 18px;
  font-size: 16px;
}

.feature-list {
  margin-top: 20px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--text-body);
  font-size: 15px;
}

.feature-list li::before {
  content: "✓";
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(255, 45, 85, 0.15);
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 700;
  margin-top: 2px;
}

.feature-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.feature-img img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.feature-img:hover img {
  transform: scale(1.04);
}

.feature-img .play-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 30px rgba(255, 45, 85, 0.5);
}

.feature-img .play-badge::after {
  content: "";
  border-left: 18px solid #fff;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  margin-left: 4px;
}

/* 流程步骤 */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.step-card {
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 45, 85, 0.35);
}

.step-num {
  font-size: 42px;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  display: block;
  margin-bottom: 12px;
}

.step-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.65;
}

/* 统计区块 */
.stats-band {
  padding: 50px 0;
  background: var(--gradient);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.stats-band .stat {
  text-align: center;
  padding: 10px 0;
}

.stats-band .stat-num {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.stats-band .stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 6px;
}

/* FAQ */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 45, 85, 0.3);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  user-select: none;
}

.faq-q .icon {
  width: 24px;
  height: 24px;
  position: relative;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-q .icon::before,
.faq-q .icon::after {
  content: "";
  position: absolute;
  background: var(--primary-light);
  border-radius: 2px;
}

.faq-q .icon::before {
  width: 10px;
  height: 2px;
  top: 11px;
  left: 7px;
}

.faq-q .icon::after {
  width: 2px;
  height: 10px;
  top: 7px;
  left: 11px;
  transition: var(--transition);
}

.faq-item.active .faq-q .icon::after {
  transform: scaleY(0);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-a-inner {
  padding: 0 24px 22px;
  color: var(--text-body);
  font-size: 15px;
  line-height: 1.75;
}

.faq-item.active .faq-a {
  max-height: 500px;
}

/* CTA 区块 */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(255,45,85,0.12) 0%, rgba(255,149,0,0.06) 100%);
  border-top: 1px solid var(--border);
}

.cta-box {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 50px 40px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient);
}

.cta-box h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.cta-box p {
  color: var(--text-body);
  margin-bottom: 28px;
  font-size: 16px;
}

.cta-btns {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* 页脚 */
.site-footer {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.75;
  margin-top: 14px;
  max-width: 300px;
}

.footer-heading {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}

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

.footer-links a {
  color: var(--text-body);
  font-size: 14px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-light);
  padding-left: 5px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 0;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-weak);
}

/* 响应式 */
@media (min-width: 1200px) {
  .footer-brand p {
    max-width: 340px;
  }
}

@media (max-width: 1024px) {
  .nav-wrap { gap: 16px; }
  .main-nav a { padding: 8px 12px; font-size: 14px; }
  .nav-cta { padding: 9px 18px !important; font-size: 14px !important; }
  .zone-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-row { gap: 40px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .page-hero h1 { font-size: 36px; }
  .section-head h2 { font-size: 30px; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--dark-2);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 20px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .main-nav a {
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 15px;
  }
  .nav-cta { display: none; }
  .page-hero { padding: 64px 0 50px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero p { font-size: 16px; }
  .feature-row { grid-template-columns: 1fr; gap: 36px; }
  .feature-row.reverse .feature-text,
  .feature-row.reverse .feature-img { order: unset; }
  .feature-img img { height: 300px; }
  .zone-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stats-band { grid-template-columns: repeat(2, 1fr); padding: 40px 20px; gap: 20px; }
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 36px; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .logo { font-size: 17px; }
  .page-hero h1 { font-size: 26px; }
  .page-hero p { font-size: 15px; }
  .hero-btns .btn { width: 100%; }
  .btn { padding: 12px 20px; font-size: 15px; }
  .page-hero .hero-stats { gap: 20px; }
  .page-hero .stat-num { font-size: 24px; }
  .zone-grid { grid-template-columns: 1fr; }
  .zone-card-img { height: 210px; }
  .steps-grid { grid-template-columns: 1fr; }
  .feature-text h3 { font-size: 24px; }
  .feature-img img { height: 240px; }
  .section-head h2 { font-size: 26px; }
  .section-head p { font-size: 15px; }
  .stats-band { grid-template-columns: 1fr 1fr; gap: 18px; }
  .stats-band .stat-num { font-size: 28px; }
  .cta-box { padding: 34px 20px; }
  .cta-box h2 { font-size: 24px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .faq-q { font-size: 15px; padding: 18px 18px; }
  .faq-a-inner { padding: 0 18px 20px; }
}

/* roulang page: category2 */
:root {
            --bg: #0b0b0f;
            --bg-soft: #111119;
            --card: #171722;
            --card-soft: #1d1d2b;
            --border: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.14);
            --text: #f5f2f2;
            --text-weak: #9b96aa;
            --primary: #e11d48;
            --primary-hover: #be123c;
            --primary-light: #fb5d6a;
            --accent: #fbbf24;
            --accent-soft: rgba(251, 191, 36, 0.12);
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 12px 32px rgba(0, 0, 0, 0.32);
            --shadow-soft: 0 6px 18px rgba(0, 0, 0, 0.22);
            --container: 1200px;
            --transition: 0.25s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background var(--transition), border-color var(--transition);
        }

        ul,
        ol {
            list-style: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 11, 15, 0.86);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            min-height: 72px;
            gap: 16px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--text);
            white-space: nowrap;
        }

        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 0 4px rgba(225, 29, 72, 0.2), 0 0 16px rgba(225, 29, 72, 0.5);
            display: inline-block;
            flex-shrink: 0;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 14px;
            border-radius: 999px;
            font-size: 15px;
            color: var(--text-weak);
            font-weight: 500;
            border: 1px solid transparent;
        }

        .main-nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--border);
        }

        .main-nav a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), #f43f5e);
            border-color: transparent;
            box-shadow: 0 6px 18px rgba(225, 29, 72, 0.3);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 26px;
            border-radius: 999px;
            transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
            border: 1px solid transparent;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #f43f5e);
            color: #fff;
            box-shadow: 0 8px 24px rgba(225, 29, 72, 0.32);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(225, 29, 72, 0.42);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline {
            background: rgba(255, 255, 255, 0.04);
            border-color: var(--border-light);
            color: var(--text);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(225, 29, 72, 0.06);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: scale(0.98);
        }

        .btn:focus-visible,
        .main-nav a:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 96px 0 88px;
            background-size: cover;
            background-position: center;
            text-align: center;
            isolation: isolate;
            border-bottom: 1px solid var(--border);
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 11, 15, 0.86) 0%, rgba(11, 11, 15, 0.68) 55%, rgba(11, 11, 15, 0.95) 100%);
            z-index: -1;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 999px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 24px;
            border: 1px solid rgba(251, 191, 36, 0.22);
        }

        .hero-tag::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
        }

        .page-hero h1 {
            font-size: clamp(34px, 6vw, 56px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
        }

        .page-hero h1 em {
            font-style: normal;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-sub {
            font-size: 17px;
            color: var(--text-weak);
            max-width: 760px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 44px;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            padding-top: 36px;
            border-top: 1px solid var(--border);
            max-width: 780px;
            margin: 0 auto;
        }

        .hero-stats .stat-item {
            text-align: center;
        }

        .hero-stats .stat-num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stats .stat-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-top: 4px;
        }

        /* Section Common */
        .section {
            padding: 86px 0;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-light);
            letter-spacing: 1px;
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: clamp(26px, 4vw, 38px);
            line-height: 1.3;
            font-weight: 800;
            letter-spacing: 0.3px;
        }

        .section-head p {
            margin-top: 16px;
            color: var(--text-weak);
            font-size: 16px;
            line-height: 1.8;
        }

        /* Feature Grid */
        .feature-grid {
            background: var(--bg-soft);
        }

        .feature-grid .grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 26px;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: "";
            position: absolute;
            right: -30px;
            top: -30px;
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(225, 29, 72, 0.16), transparent 70%);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(225, 29, 72, 0.35);
            box-shadow: var(--shadow);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(225, 29, 72, 0.18), rgba(251, 93, 106, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 26px;
            border: 1px solid rgba(225, 29, 72, 0.2);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14.5px;
            color: var(--text-weak);
            line-height: 1.75;
        }

        /* Video Cards */
        .video-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .video-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .video-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(225, 29, 72, 0.3);
        }

        .video-cover {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

        .video-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

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

        .video-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0) 40%, rgba(0, 0, 0, 0.72) 100%);
        }

        .video-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            padding: 4px 12px;
            background: rgba(11, 11, 15, 0.78);
            backdrop-filter: blur(6px);
            border: 1px solid var(--border-light);
            border-radius: 999px;
            font-size: 12.5px;
            color: #fff;
            font-weight: 500;
        }

        .video-time {
            position: absolute;
            right: 14px;
            bottom: 12px;
            z-index: 2;
            padding: 3px 10px;
            background: rgba(0, 0, 0, 0.65);
            border-radius: 6px;
            font-size: 12.5px;
            color: #fff;
            letter-spacing: 0.5px;
        }

        .video-info {
            padding: 20px 20px 22px;
        }

        .video-info h3 {
            font-size: 16.5px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .video-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            color: var(--text-weak);
            font-size: 13.5px;
        }

        .video-hot {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--accent);
            font-weight: 600;
        }

        .video-hot::before {
            content: "🔥";
            font-size: 14px;
        }

        /* Proof Section */
        .proof-section {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .proof-wrap {
            display: grid;
            grid-template-columns: 1.1fr 1.4fr;
            gap: 48px;
            align-items: center;
        }

        .proof-numbers {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .data-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 24px;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .data-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-soft);
        }

        .data-card .num {
            font-size: 36px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }

        .data-card .label {
            font-size: 14px;
            color: var(--text-weak);
            margin-top: 8px;
        }

        .reason-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .reason-item {
            display: flex;
            gap: 16px;
            padding: 22px 24px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .reason-item:hover {
            border-color: rgba(225, 29, 72, 0.3);
            box-shadow: var(--shadow-soft);
        }

        .reason-index {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(225, 29, 72, 0.12);
            border: 1px solid rgba(225, 29, 72, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: var(--primary-light);
        }

        .reason-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .reason-item p {
            font-size: 14.5px;
            color: var(--text-weak);
            line-height: 1.75;
        }

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

        .scenario-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            position: relative;
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .scenario-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .scenario-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: rgba(225, 29, 72, 0.25);
        }

        .scenario-card:hover::before {
            opacity: 1;
        }

        .scenario-icon {
            font-size: 40px;
            margin-bottom: 18px;
        }

        .scenario-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .scenario-card p {
            font-size: 14.5px;
            color: var(--text-weak);
            line-height: 1.75;
        }

        /* Steps */
        .steps-section {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 26px;
            position: relative;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .step-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-soft);
        }

        .step-num {
            width: 46px;
            height: 46px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #f43f5e);
            color: #fff;
            font-weight: 800;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 16px rgba(225, 29, 72, 0.3);
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.65;
        }

        /* FAQ */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(225, 29, 72, 0.25);
        }

        .faq-item summary {
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "+";
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(225, 29, 72, 0.12);
            border: 1px solid rgba(225, 29, 72, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary-light);
            transition: transform var(--transition), background var(--transition);
        }

        .faq-item details[open] summary::after {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            padding: 0 28px 24px;
            color: var(--text-weak);
            font-size: 14.5px;
            line-height: 1.8;
            border-top: 1px solid transparent;
        }

        .faq-item[open] .faq-answer {
            border-top-color: var(--border);
            padding-top: 18px;
        }

        /* CTA Banner */
        .cta-banner {
            position: relative;
            padding: 90px 0;
            background-size: cover;
            background-position: center;
            isolation: isolate;
            text-align: center;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 11, 15, 0.92), rgba(11, 11, 15, 0.8));
            z-index: -1;
        }

        .cta-banner h2 {
            font-size: clamp(28px, 4.5vw, 44px);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-banner p {
            font-size: 17px;
            color: var(--text-weak);
            max-width: 620px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .cta-banner .btn {
            font-size: 17px;
            padding: 15px 42px;
        }

        /* Footer */
        .site-footer {
            background: #08080c;
            border-top: 1px solid var(--border);
            padding: 70px 0 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.1fr;
            gap: 40px;
            padding-bottom: 44px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 19px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.75;
            max-width: 300px;
        }

        .footer-heading {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-weak);
        }

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

        .footer-bottom {
            padding: 22px 0;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .feature-grid .grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

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

            .footer-top {
                grid-template-columns: 1fr 1fr;
            }

            .proof-wrap {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 768px) {
            .nav-wrap {
                min-height: 64px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                display: none;
                width: 100%;
                background: #101016;
                border-radius: var(--radius-sm);
                padding: 16px;
                border: 1px solid var(--border);
                box-shadow: var(--shadow);
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }

            .main-nav a {
                display: block;
                text-align: left;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                display: none;
            }

            .page-hero {
                padding: 70px 0 64px;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .section {
                padding: 64px 0;
            }

            .section-head {
                margin-bottom: 36px;
            }

            .feature-grid .grid,
            .video-grid,
            .scenario-grid,
            .steps-grid {
                grid-template-columns: 1fr;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stats .stat-num {
                font-size: 22px;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

            .proof-numbers {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .logo {
                font-size: 17px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .proof-numbers {
                grid-template-columns: 1fr;
            }

            .faq-item summary {
                padding: 18px 18px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 18px 20px;
            }

            .data-card .num {
                font-size: 30px;
            }
        }