/* roulang page: index */
:root {
    --primary: #5b8cff;
    --primary-light: #7ba8ff;
    --primary-dark: #3c63d6;
    --accent: #ffc24b;
    --accent-light: #ffd98a;
    --bg: #080e1a;
    --bg-soft: #0d1524;
    --bg-card: #121d33;
    --bg-card-hover: #182642;
    --text: #e8ecf4;
    --text-soft: #a8b4ce;
    --text-muted: #6c7a96;
    --border: #1e2c47;
    --border-light: #2b3d61;
    --radius-sm: 10px;
    --radius: 18px;
    --radius-lg: 28px;
    --shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 18px 48px rgba(91, 140, 255, 0.16);
    --transition: all .3s ease;
    --container: 1200px;
    --header-h: 76px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: #fff; }
button, input { font-family: inherit; font-size: inherit; }
ul { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-tag {
    display: inline-block;
    background: rgba(91, 140, 255, .12);
    border: 1px solid rgba(91, 140, 255, .32);
    color: var(--primary-light);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    padding: 6px 18px;
    border-radius: 100px;
    margin-bottom: 16px;
    text-transform: uppercase;
}
.section-header { margin-bottom: 48px; }
.section-header.center { text-align: center; }
.section-header h2 { font-size: 34px; font-weight: 700; line-height: 1.3; margin-bottom: 14px; letter-spacing: -0.5px; }
.section-header p { color: var(--text-soft); max-width: 560px; font-size: 16px; }
.section-header.center p { margin: 0 auto; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1.4;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(91, 140, 255, .35); }
.btn-ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .35); }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .08); color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary-light); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(91, 140, 255, .25); }
.btn-light { background: #fff; color: #111; }
.btn-light:hover { background: var(--accent-light); color: #111; transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0, 0, 0, .25); }
.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn:focus-visible, .nav-link:focus-visible, .nav-toggle:focus-visible, .faq-item summary:focus-visible, a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}

/* ===== 导航 ===== */
.site-header {
    position: fixed;
    top: 18px;
    left: 0;
    width: 100%;
    z-index: 100;
    padding: 0 24px;
}
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
    background: rgba(10, 16, 32, .82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 100px;
    padding: 0 16px 0 28px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .35);
    max-width: 1180px;
    margin: 0 auto;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: #fff; }
.logo .logo-icon {
    width: 38px; height: 38px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    font-size: 18px;
    color: #fff;
    box-shadow: 0 4px 16px rgba(91, 140, 255, .35);
}
.logo-text { letter-spacing: 1px; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link {
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-soft);
    transition: var(--transition);
}
.nav-link:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.nav-link.active { color: #fff; background: var(--primary); box-shadow: 0 4px 16px rgba(91, 140, 255, .3); }
.nav-toggle {
    display: none;
    width: 44px; height: 44px;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 50%;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; padding: 140px 0 100px; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(8, 14, 26, .78) 0%, rgba(8, 14, 26, .86) 50%, var(--bg) 100%);
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 860px; margin: 0 auto; }
.hero-badge {
    display: inline-block;
    background: rgba(91, 140, 255, .15);
    border: 1px solid rgba(91, 140, 255, .4);
    color: var(--accent);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    padding: 8px 22px;
    border-radius: 100px;
    margin-bottom: 28px;
    backdrop-filter: blur(4px);
}
.hero h1 { font-size: clamp(40px, 7vw, 72px); font-weight: 800; line-height: 1.15; letter-spacing: -1px; text-shadow: 0 4px 32px rgba(0, 0, 0, .4); margin-bottom: 20px; }
.hero h1 .gradient-text {
    background: linear-gradient(120deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-desc { font-size: 18px; color: var(--text-soft); max-width: 620px; margin: 0 auto 36px; line-height: 1.8; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; }
.stat-item { text-align: center; }
.stat-item strong { display: block; font-size: 36px; font-weight: 800; color: #fff; line-height: 1.2; }
.stat-item span { font-size: 13px; color: var(--text-muted); letter-spacing: 1px; }

/* ===== About / 平台亮点 ===== */
.about { background: var(--bg-soft); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-media { position: relative; }
.about-media::before {
    content: '';
    position: absolute;
    inset: -18px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(91, 140, 255, .18), rgba(255, 194, 75, .12));
    z-index: 0;
}
.about-media img { position: relative; border-radius: var(--radius-lg); box-shadow: var(--shadow); z-index: 1; width: 100%; object-fit: cover; aspect-ratio: 4/3; }
.about-content h2 { font-size: 32px; font-weight: 700; margin-bottom: 20px; letter-spacing: -0.5px; line-height: 1.3; }
.about-content > p { color: var(--text-soft); margin-bottom: 24px; }
.about-list { display: grid; gap: 16px; margin-bottom: 32px; }
.about-list li { display: flex; gap: 12px; color: var(--text-soft); font-size: 15px; align-items: flex-start; }
.about-list li::before {
    content: '';
    flex-shrink: 0;
    width: 22px; height: 22px;
    margin-top: 3px;
    background: rgba(91, 140, 255, .15);
    border: 1px solid rgba(91, 140, 255, .4);
    border-radius: 50%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%235b8cff' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 10l4 4 8-9'/%3E%3C/svg%3E");
    background-size: 12px;
    background-position: center;
    background-repeat: no-repeat;
}
.about-list strong { color: #fff; font-weight: 600; }

/* ===== 分类卡片 ===== */
.category-section { background: var(--bg); }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--border-light); }
.card-media { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.category-card:hover .card-media img { transform: scale(1.05); }
.card-media::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0) 40%, rgba(8, 14, 26, .75) 100%);
}
.card-media .card-icon {
    position: absolute;
    left: 20px; bottom: 16px;
    z-index: 2;
    width: 48px; height: 48px;
    display: flex; align-items: center; justify-content: center;
    background: var(--primary);
    border-radius: 14px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 6px 20px rgba(91, 140, 255, .35);
}
.card-body { padding: 24px; }
.card-body h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: #fff; }
.card-body p { font-size: 14px; color: var(--text-soft); margin-bottom: 16px; line-height: 1.7; }
.card-more { font-size: 14px; font-weight: 600; color: var(--primary-light); }
.category-card:hover .card-more { color: var(--accent); }

/* ===== 最新资讯 ===== */
.latest { background: var(--bg-soft); }
.latest-grid { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }
.latest-main { display: grid; gap: 16px; }
.post-item {
    display: flex;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}
.post-item:hover { border-color: var(--border-light); box-shadow: 0 10px 32px rgba(0, 0, 0, .2); transform: translateY(-2px); }
.post-index {
    flex-shrink: 0;
    font-size: 22px;
    font-weight: 800;
    color: rgba(255, 255, 255, .15);
    font-style: italic;
    min-width: 40px;
    line-height: 1;
}
.post-content { flex: 1; }
.post-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.badge {
    display: inline-block;
    padding: 3px 12px;
    background: rgba(91, 140, 255, .14);
    border: 1px solid rgba(91, 140, 255, .3);
    color: var(--primary-light);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
}
.post-meta time { font-size: 13px; color: var(--text-muted); }
.post-content h3 { font-size: 18px; font-weight: 600; line-height: 1.5; margin-bottom: 6px; }
.post-content h3 a { color: #fff; }
.post-content h3 a:hover { color: var(--primary-light); }
.post-content p { font-size: 14px; color: var(--text-muted); margin-bottom: 10px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.read-more { font-size: 14px; font-weight: 600; color: var(--primary-light); }
.read-more:hover { color: var(--accent); }
.empty-state {
    background: var(--bg-card);
    border: 1px dashed var(--border-light);
    border-radius: var(--radius);
    padding: 60px 24px;
    text-align: center;
    color: var(--text-muted);
}
.latest-side { display: grid; gap: 20px; position: sticky; top: 110px; }
.side-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}
.side-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 16px; color: #fff; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.side-list { display: grid; gap: 10px; }
.side-list a { color: var(--text-soft); font-size: 14px; padding: 6px 0; display: block; border-radius: 8px; transition: var(--transition); }
.side-list a:hover { color: #fff; padding-left: 8px; background: rgba(91, 140, 255, .08); }
.side-highlight p { font-size: 14px; color: var(--text-muted); margin-bottom: 18px; }
.side-highlight .btn { width: 100%; margin-bottom: 10px; }

/* ===== 流程 ===== */
.process { background: var(--bg); }
.process-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: step; }
.process-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    position: relative;
    transition: var(--transition);
}
.process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--border-light); }
.step-num {
    display: inline-block;
    font-size: 28px;
    font-weight: 800;
    color: rgba(91, 140, 255, .5);
    margin-bottom: 16px;
    font-style: italic;
    letter-spacing: -1px;
}
.process-step h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: #fff; }
.process-step p { font-size: 14px; color: var(--text-soft); line-height: 1.7; }

/* ===== 特色 ===== */
.feature { background: var(--bg-soft); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: var(--border-light); }
.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px; height: 64px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(91, 140, 255, .15), rgba(255, 194, 75, .1));
    border: 1px solid rgba(91, 140, 255, .3);
    border-radius: 20px;
    font-size: 26px;
}
.feature-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; color: #fff; }
.feature-card p { font-size: 14px; color: var(--text-soft); line-height: 1.7; }

/* ===== FAQ ===== */
.faq { background: var(--bg); }
.faq-list { max-width: 780px; margin: 0 auto; display: grid; gap: 14px; }
.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: var(--border-light); }
.faq-item summary {
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    list-style: none;
    position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+';
    font-size: 24px;
    font-weight: 400;
    color: var(--primary-light);
    transition: transform .3s ease;
    flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item[open] summary { background: rgba(91, 140, 255, .05); }
.faq-item p { padding: 0 28px 22px; color: var(--text-soft); font-size: 15px; line-height: 1.8; }
.faq-item[open] { box-shadow: var(--shadow-hover); }

/* ===== CTA ===== */
.cta { background: var(--bg-soft); padding-bottom: 0; }
.cta-box {
    position: relative;
    border-radius: var(--radius-lg);
    background-size: cover;
    background-position: center;
    overflow: hidden;
    padding: 80px 48px;
    text-align: center;
    box-shadow: var(--shadow);
}
.cta-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(8, 14, 26, .72), rgba(8, 14, 26, .88));
}
.cta-content { position: relative; z-index: 2; }
.cta-content h2 { font-size: 32px; font-weight: 800; color: #fff; margin-bottom: 14px; fontSize: clamp(24px, 4vw, 36px); }
.cta-content p { color: var(--text-soft); margin-bottom: 28px; max-width: 480px; margin-left: auto; margin-right: auto; }

/* ===== 页脚 ===== */
.site-footer { background: var(--bg); border-top: 1px solid var(--border); padding-top: 72px; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand h3 { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 14px; color: var(--text-muted); max-width: 360px; line-height: 1.8; }
.footer-links h4, .footer-info h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 18px; letter-spacing: 1px; }
.footer-links a { display: block; font-size: 14px; color: var(--text-muted); padding: 5px 0; transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); padding-left: 8px; }
.footer-info p { font-size: 14px; color: var(--text-muted); padding: 4px 0; }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 0; }
.footer-bottom .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-bottom p { font-size: 13px; color: var(--text-muted); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .section { padding: 72px 0; }
    .about-grid { gap: 40px; }
    .category-grid { gap: 20px; }
    .latest-grid { grid-template-columns: 1fr; }
    .latest-side { position: static; grid-template-columns: 1fr 1fr; }
    .process-grid { gap: 20px; }
}
@media (max-width: 768px) {
    .container { padding: 0 20px; }
    .section-header h2 { font-size: 28px; }
    .nav-wrap { height: 64px; border-radius: 50px; padding-left: 16px; }
    .logo-text { font-size: 17px; }
    .logo-icon { width: 32px; height: 32px; font-size: 15px; }
    .nav-toggle { display: flex; }
    .main-nav {
        position: absolute;
        top: calc(100% + 12px);
        left: 24px;
        right: 24px;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        background: rgba(10, 16, 32, .96);
        backdrop-filter: blur(20px);
        border: 1px solid var(--border);
        border-radius: 20px;
        padding: 12px;
        box-shadow: var(--shadow);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: var(--transition);
    }
    .main-nav.open { opacity: 1; visibility: visible; transform: translateY(0); }
    .nav-link { padding: 12px 16px; font-size: 15px; }
    .hero { padding: 130px 0 80px; }
    .hero-stats { gap: 24px; }
    .stat-item strong { font-size: 28px; }
    .about-grid { grid-template-columns: 1fr; }
    .about-media { max-width: 520px; margin: 0 auto; }
    .category-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
    .process-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
    .feature-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .cta-box { padding: 56px 28px; }
    .latest-side { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: center; }
    .hero-actions .btn { width: 100%; max-width: 280px; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .section { padding: 56px 0; }
    .section-header h2 { font-size: 24px; }
    .hero { padding: 110px 0 60px; }
    .hero h1 { font-size: 34px; }
    .hero-desc { font-size: 16px; }
    .hero-stats { gap: 16px; }
    .stat-item strong { font-size: 22px; }
    .stat-item span { font-size: 12px; }
    .post-item { flex-direction: column; gap: 10px; padding: 20px; }
    .post-index { font-size: 18px; min-width: auto; }
    .btn { padding: 12px 22px; font-size: 14px; }
    .card-body { padding: 20px; }
    .faq-item summary { padding: 18px 20px; font-size: 15px; }
    .faq-item p { padding: 0 20px 18px; }
    .footer-bottom .container { flex-direction: column; text-align: center; }
}

/* roulang page: category1 */
:root {
            --primary: #1e2a5a;
            --primary-dark: #141c3d;
            --accent: #f6b73c;
            --accent-dark: #d99a24;
            --bg: #f5f7fb;
            --bg-soft: #ffffff;
            --text: #1f2937;
            --text-weak: #6b7280;
            --line: #e5e7eb;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(30, 42, 90, .06);
            --shadow-md: 0 10px 30px rgba(30, 42, 90, .1);
            --shadow-lg: 0 20px 50px rgba(30, 42, 90, .14);
            --spacer: 80px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button {
            font-family: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(229, 231, 235, 0.8);
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
        }

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

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), #33478d);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 6px 16px rgba(30, 42, 90, .24);
        }

        .logo-text {
            letter-spacing: .02em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 6px;
            background: rgba(241, 244, 250, 0.9);
            border-radius: 999px;
        }

        .nav-link {
            display: block;
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-weak);
            transition: color .3s ease, background .3s ease, box-shadow .3s ease;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(255, 255, 255, .7);
        }

        .nav-link.active {
            color: var(--primary);
            background: #fff;
            box-shadow: 0 4px 14px rgba(30, 42, 90, .1);
        }

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

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .page-banner {
            position: relative;
            min-height: 400px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            color: #fff;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(20, 28, 61, .94) 0%, rgba(30, 42, 90, .78) 50%, rgba(30, 42, 90, .42) 100%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            padding: 80px 0;
        }

        .banner-tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 999px;
            background: rgba(246, 183, 60, .18);
            border: 1px solid rgba(246, 183, 60, .4);
            color: #ffe1a1;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .06em;
            margin-bottom: 18px;
        }

        .page-banner h1 {
            font-size: 46px;
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .banner-sub {
            font-size: 18px;
            max-width: 620px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
        }

        .banner-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 15px;
            border: 0;
            cursor: pointer;
            transition: all .3s ease;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 8px 20px rgba(246, 183, 60, .35);
        }

        .btn-primary:hover {
            background: #ffc85a;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(246, 183, 60, .45);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, .14);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .5);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, .22);
            transform: translateY(-2px);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .section {
            padding: var(--spacer) 0;
        }

        .section-tag {
            display: inline-block;
            margin-bottom: 12px;
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .1em;
            text-transform: uppercase;
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--text);
        }

        .section-head p {
            margin-top: 10px;
            color: var(--text-weak);
            max-width: 640px;
        }

        .intro-section {
            background: #fff;
        }

        .intro-top {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .intro-top h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .intro-top p {
            color: var(--text-weak);
            font-size: 15px;
            margin-top: 10px;
        }

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

        .feature-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: transform .3s ease, box-shadow .3s ease;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .feature-num {
            display: inline-flex;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            background: rgba(246, 183, 60, .16);
            color: var(--accent-dark);
            border-radius: 12px;
            font-weight: 800;
            font-size: 18px;
            margin-bottom: 16px;
        }

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

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

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

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

        .article-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--line);
            transition: transform .3s ease, box-shadow .3s ease;
        }

        .article-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .article-cover {
            position: relative;
            aspect-ratio: 3 / 2;
            overflow: hidden;
            background: #edf0f5;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .article-body {
            padding: 20px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-weak);
            margin-bottom: 10px;
        }

        .article-tag {
            background: rgba(246, 183, 60, .16);
            color: var(--accent-dark);
            padding: 2px 10px;
            border-radius: 999px;
            font-weight: 600;
        }

        .article-body h3 {
            font-size: 16px;
            line-height: 1.5;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .article-body p {
            font-size: 14px;
            color: var(--text-weak);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .stats-section {
            background: linear-gradient(135deg, #141c3d 0%, #1e2a5a 55%, #33478d 100%);
            color: #fff;
            padding: 70px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item strong {
            display: block;
            font-size: 42px;
            font-weight: 800;
            color: #ffd479;
            line-height: 1.2;
        }

        .stat-item span {
            display: block;
            margin-top: 8px;
            color: rgba(255, 255, 255, .78);
            font-size: 15px;
        }

        .guide-section {
            background: #fff;
        }

        .guide-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .guide-media img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            height: 100%;
            object-fit: cover;
        }

        .guide-content h2 {
            font-size: 32px;
            margin: 12px 0 20px;
            line-height: 1.3;
            font-weight: 800;
        }

        .check-list li {
            position: relative;
            padding: 10px 0 10px 30px;
            border-bottom: 1px dashed var(--line);
            font-size: 15px;
        }

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

        .check-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 18px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: rgba(246, 183, 60, .25);
        }

        .check-list li::after {
            content: "✓";
            position: absolute;
            left: 2px;
            top: 13px;
            font-size: 12px;
            color: var(--accent-dark);
            font-weight: 800;
        }

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

        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 18px 20px;
        }

        .faq-item summary {
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            padding: 6px 0;
            position: relative;
            padding-right: 30px;
            list-style: none;
        }

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

        .faq-item summary::after {
            content: "+";
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(30, 42, 90, .08);
            border-radius: 50%;
            color: var(--primary);
            font-weight: 700;
            transition: transform .3s ease;
        }

        .faq-item[open] summary::after {
            content: "−";
        }

        .faq-item p {
            margin-top: 10px;
            color: var(--text-weak);
            font-size: 14px;
        }

        .cta-section {
            padding: 80px 0;
            background: var(--bg);
        }

        .cta-card {
            background: linear-gradient(135deg, #f6b73c 0%, #ffd479 50%, #f6b73c 100%);
            border-radius: 28px;
            padding: 56px 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            box-shadow: var(--shadow-lg);
        }

        .cta-copy h2 {
            font-size: 28px;
            line-height: 1.4;
            color: var(--primary-dark);
            font-weight: 800;
        }

        .cta-copy p {
            margin-top: 12px;
            color: #4b3a17;
            font-size: 15px;
            max-width: 600px;
        }

        .site-footer {
            background: #141c3d;
            color: #aeb6d0;
            padding-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            max-width: 340px;
        }

        .footer-links h4,
        .footer-info h4 {
            color: #fff;
            font-size: 15px;
            margin-bottom: 16px;
        }

        .footer-links a {
            display: block;
            margin-bottom: 10px;
            color: #aeb6d0;
            font-size: 14px;
            transition: color .3s ease;
        }

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

        .footer-info p {
            font-size: 13px;
            color: #8b93b1;
            margin-bottom: 6px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 20px 0;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #8b93b1;
            text-align: center;
        }

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

            .guide-wrap {
                grid-template-columns: 1fr;
            }

            .cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 40px;
            }
        }

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

            .main-nav {
                position: absolute;
                top: 68px;
                left: 20px;
                right: 20px;
                flex-direction: column;
                align-items: stretch;
                border-radius: 20px;
                box-shadow: var(--shadow-lg);
                padding: 16px;
                background: #fff;
                opacity: 0;
                visibility: hidden;
                transform: translateY(-8px);
                transition: all .3s ease;
            }

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

            .nav-link {
                text-align: center;
                padding: 14px;
            }

            .nav-toggle {
                display: flex;
            }

            .page-banner {
                min-height: 360px;
            }

            .page-banner h1 {
                font-size: 34px;
            }

            .banner-sub {
                font-size: 16px;
            }

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

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

            .section {
                padding: 56px 0;
            }
        }

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

            .page-banner {
                min-height: 340px;
            }

            .page-banner h1 {
                font-size: 28px;
            }

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

            .cta-card {
                padding: 24px;
            }

            .btn {
                padding: 12px 18px;
                font-size: 14px;
            }
        }

/* roulang page: article */
:root {
    --primary: #d9252e;
    --primary-dark: #a5181f;
    --accent: #ff7a1a;
    --ink: #0b1220;
    --bg: #f6f7fb;
    --surface: #ffffff;
    --text: #1e293b;
    --text-weak: #64748b;
    --border: #e2e8f0;
    --radius: 20px;
    --radius-sm: 12px;
    --shadow: 0 4px 24px rgba(15, 23, 42, .08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, .12);
    --transition: .25s ease;
    --container: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); }
button { font-family: inherit; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.site-header {
    position: sticky;
    top: 12px;
    z-index: 100;
    padding: 0 16px;
    margin-top: 12px;
}
.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, .86);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, .45);
    border-radius: 999px;
    box-shadow: 0 8px 32px rgba(15, 23, 42, .08);
    padding: 10px 20px;
    max-width: 1140px;
    margin: 0 auto;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}
.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 13px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 800;
    font-size: 18px;
    box-shadow: 0 6px 18px rgba(217, 37, 46, .3);
}
.logo-text {
    font-size: 18px;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: .5px;
    white-space: nowrap;
}
.main-nav {
    display: flex;
    gap: 4px;
    align-items: center;
}
.nav-link {
    padding: 8px 18px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    transition: all var(--transition);
}
.nav-link:hover {
    background: rgba(217, 37, 46, .08);
    color: var(--primary);
}
.nav-link.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(217, 37, 46, .3);
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 10px;
}
.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    transition: all var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.article-hero {
    min-height: 340px;
    background: linear-gradient(100deg, rgba(11, 18, 32, .82), rgba(11, 18, 32, .55)), url('/assets/images/backpic/back-2.png') center/cover;
    display: flex;
    align-items: flex-end;
    color: #fff;
    padding: 80px 0 48px;
    position: relative;
    overflow: hidden;
}
.article-hero::after {
    content: "";
    position: absolute;
    bottom: -80px;
    right: -60px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(255, 122, 26, .18);
}
.article-hero .container { position: relative; z-index: 2; }
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    margin-bottom: 22px;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-weak); text-decoration: none; transition: color var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-light a { color: rgba(255, 255, 255, .78); }
.breadcrumb-light a:hover { color: #fff; }
.breadcrumb-sep { color: var(--text-weak); }
.breadcrumb-light .breadcrumb-sep { color: rgba(255, 255, 255, .5); }
.hero-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .3);
    color: #fff;
    padding: 6px 18px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
    backdrop-filter: blur(6px);
}
.hero-title {
    font-size: 38px;
    font-weight: 800;
    line-height: 1.3;
    max-width: 820px;
}
.hero-desc {
    font-size: 16px;
    opacity: .92;
    max-width: 660px;
    margin-top: 12px;
}
.hero-meta {
    display: flex;
    gap: 22px;
    margin-top: 20px;
    font-size: 14px;
    opacity: .85;
    flex-wrap: wrap;
}
.hero-meta span { display: inline-flex; align-items: center; }
.hero-meta i { margin-right: 7px; }

.article-shell { padding: 48px 0 64px; }
.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 32px;
    align-items: start;
}
.article-main { min-width: 0; }
.article-card {
    background: var(--surface);
    border-radius: 24px;
    padding: 40px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.badge {
    display: inline-flex;
    align-items: center;
    background: #fef2f2;
    color: var(--primary);
    border: 1px solid #fecaca;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
}
.article-meta time {
    color: var(--text-weak);
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-cover {
    width: 100%;
    border-radius: 18px;
    margin: 24px 0 8px;
    box-shadow: var(--shadow);
    aspect-ratio: 16 / 8;
    object-fit: cover;
}
.article-body { margin-top: 16px; }
.article-body h2 {
    font-size: 24px;
    font-weight: 800;
    color: var(--ink);
    margin: 32px 0 14px;
    padding-left: 14px;
    border-left: 4px solid var(--primary);
}
.article-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--ink);
    margin: 24px 0 10px;
}
.article-body p {
    margin: 16px 0;
    color: #334155;
    font-size: 16px;
}
.article-body ul,
.article-body ol {
    margin: 16px 0;
    padding-left: 24px;
    color: #334155;
}
.article-body li { margin: 6px 0; }
.article-body img {
    max-width: 100%;
    border-radius: 16px;
    margin: 22px 0;
    box-shadow: var(--shadow);
}
.article-body blockquote {
    margin: 22px 0;
    padding: 18px 22px;
    background: #fef2f2;
    border-left: 4px solid var(--primary);
    border-radius: 0 14px 14px 0;
    color: #7f1d1d;
    font-size: 15px;
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 22px 0;
    font-size: 14px;
}
.article-body th,
.article-body td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.article-body th {
    background: var(--bg);
    font-weight: 700;
    color: var(--ink);
}
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.tag-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-weak);
    margin-right: 4px;
}
.tag {
    display: inline-flex;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 999px;
    padding: 5px 14px;
    font-size: 13px;
    font-weight: 600;
    transition: all var(--transition);
}
.tag:hover {
    background: rgba(217, 37, 46, .07);
    border-color: rgba(217, 37, 46, .25);
    color: var(--primary);
}

.not-found-card {
    background: var(--surface);
    border-radius: 24px;
    padding: 80px 40px;
    text-align: center;
    border: 1px dashed var(--border);
    box-shadow: var(--shadow);
}
.not-found-card i {
    font-size: 52px;
    color: var(--primary);
    margin-bottom: 18px;
}
.not-found-card h2 { font-size: 28px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.not-found-card p { color: var(--text-weak); margin-bottom: 28px; }

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    padding: 12px 30px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 15px;
    font-weight: 700;
    border: none;
    box-shadow: 0 8px 22px rgba(217, 37, 46, .25);
    transition: all var(--transition);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(217, 37, 46, .3);
}
.btn-primary:focus-visible,
.btn-light:focus-visible,
.btn-outline-light:focus-visible {
    outline: 3px solid rgba(217, 37, 46, .3);
    outline-offset: 3px;
}

.article-side { min-width: 0; }
.side-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    transition: box-shadow var(--transition);
}
.side-card:hover { box-shadow: var(--shadow-lg); }
.side-card h3 {
    font-size: 16px;
    font-weight: 800;
    color: var(--ink);
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--bg);
}
.side-card a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition);
}
.side-card a:hover {
    background: rgba(217, 37, 46, .06);
    color: var(--primary);
    transform: translateX(4px);
}
.side-card .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.side-info p { font-size: 14px; color: var(--text-weak); margin: 6px 0; }
.side-info p:first-of-type { margin-top: 8px; }

.faq-section { padding: 72px 0; background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { text-align: center; max-width: 700px; margin: 0 auto 48px; }
.section-eyebrow {
    display: inline-block;
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 2px;
    margin-bottom: 10px;
}
.section-head h2 { font-size: 30px; font-weight: 800; color: var(--ink); }
.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    max-width: 1000px;
    margin: 0 auto;
}
.faq-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 4px 22px;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item[open] { border-color: rgba(217, 37, 46, .25); box-shadow: var(--shadow); }
.faq-item summary {
    font-weight: 700;
    font-size: 15px;
    color: var(--ink);
    padding: 16px 0;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: "+";
    font-size: 22px;
    color: var(--primary);
    font-weight: 400;
    transition: transform .3s;
    flex-shrink: 0;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { padding: 0 0 16px; color: var(--text-weak); font-size: 14px; line-height: 1.8; }

.cta-section { padding: 80px 0; }
.cta-inner {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary) 50%, var(--accent));
    border-radius: 28px;
    padding: 60px 48px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.cta-inner::before {
    content: "";
    position: absolute;
    top: -80px;
    right: -50px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .1);
}
.cta-inner::after {
    content: "";
    position: absolute;
    bottom: -100px;
    left: -40px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .06);
}
.cta-inner h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; position: relative; z-index: 2; }
.cta-inner p { max-width: 560px; margin: 0 auto 28px; opacity: .92; position: relative; z-index: 2; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 2; }
.btn-light {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    color: var(--primary-dark);
    padding: 12px 30px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    font-size: 15px;
    border: none;
    transition: all var(--transition);
}
.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, .15);
}
.btn-outline-light {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: #fff;
    padding: 12px 30px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 700;
    font-size: 15px;
    border: 2px solid rgba(255, 255, 255, .65);
    transition: all var(--transition);
}
.btn-outline-light:hover {
    background: rgba(255, 255, 255, .12);
    border-color: #fff;
    transform: translateY(-2px);
}

.site-footer {
    background: var(--ink);
    color: #94a3b8;
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand h3 { color: #fff; font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; line-height: 1.8; }
.footer-links h4,
.footer-info h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.footer-links a {
    display: block;
    color: #94a3b8;
    text-decoration: none;
    padding: 5px 0;
    font-size: 14px;
    transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }
.footer-info p { font-size: 14px; margin: 4px 0; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 20px 0; }
.footer-bottom p { font-size: 13px; text-align: center; }

@media (max-width: 1024px) {
    .article-layout { grid-template-columns: minmax(0, 1fr) 280px; gap: 24px; }
    .faq-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
    .nav-wrap { flex-wrap: wrap; }
    .nav-toggle { display: flex; }
    .main-nav {
        position: absolute;
        top: calc(100% + 10px);
        left: 16px;
        right: 16px;
        flex-direction: column;
        align-items: stretch;
        background: #fff;
        border-radius: 20px;
        box-shadow: var(--shadow-lg);
        padding: 14px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all var(--transition);
    }
    .main-nav.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    .nav-link { padding: 12px 18px; }

    .article-hero { min-height: 290px; padding: 64px 0 40px; }
    .hero-title { font-size: 30px; }
    .article-layout { grid-template-columns: 1fr; }
    .article-card { padding: 28px 22px; }
    .faq-grid { grid-template-columns: 1fr; }
    .cta-section { padding: 56px 0; }
    .cta-inner { padding: 48px 24px; }
    .cta-inner h2 { font-size: 26px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-brand { grid-column: auto; }
}

@media (max-width: 520px) {
    .site-header { top: 8px; margin-top: 8px; padding: 0 10px; }
    .nav-wrap { padding: 8px 14px; }
    .logo-text { font-size: 16px; }
    .hero-title { font-size: 25px; }
    .hero-desc { font-size: 14px; }
    .article-hero { min-height: 260px; }
    .article-shell { padding: 32px 0 48px; }
    .article-card { padding: 22px 16px; border-radius: 18px; }
    .article-body p { font-size: 15px; }
    .article-cover { aspect-ratio: 4 / 3; }
    .cta-inner { border-radius: 20px; }
    .cta-actions { flex-direction: column; }
    .btn-light,
    .btn-outline-light { justify-content: center; }
    .footer-grid { gap: 24px; }
}

/* roulang page: category2 */
:root {
            --primary: #1e3a5f;
            --primary-dark: #142a44;
            --primary-light: #2d4f7a;
            --accent: #f0612d;
            --accent-light: #ff8257;
            --accent-soft: #fff1eb;
            --bg-body: #f5f7fb;
            --bg-white: #ffffff;
            --bg-dark: #142a44;
            --text-main: #1e293b;
            --text-sub: #64748b;
            --text-light: #94a3b8;
            --border-line: #e2e8f0;
            --border-focus: rgba(240, 97, 45, 0.5);
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-card: 0 4px 24px rgba(30, 58, 95, 0.07);
            --shadow-hover: 0 14px 42px rgba(30, 58, 95, 0.15);
            --shadow-nav: 0 8px 32px rgba(20, 42, 68, 0.18);
            --container-w: 1200px;
            --header-h: 78px;
            --transition-base: all 0.3s ease;
            --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        }

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

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

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

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: var(--transition-base);
        }

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 999;
            padding: 0 20px;
            pointer-events: none;
        }

        .site-header .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            max-width: 1160px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, 0.75);
            border-radius: 60px;
            padding: 12px 18px 12px 24px;
            box-shadow: var(--shadow-nav);
            pointer-events: auto;
            transition: var(--transition-base);
        }

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

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 1px;
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.3);
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
            line-height: 1.2;
            white-space: nowrap;
        }

        .logo-text small {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-sub);
            letter-spacing: 2px;
            text-transform: uppercase;
        }

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

        .nav-link {
            display: inline-block;
            padding: 9px 18px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            letter-spacing: 0.3px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
        }

        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 18px rgba(30, 58, 95, 0.35);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            padding: 10px;
            border-radius: 12px;
            background: rgba(30, 58, 95, 0.08);
            transition: var(--transition-base);
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            width: 20px;
            border-radius: 3px;
            background: var(--primary);
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(30, 58, 95, 0.15);
        }

        @media (max-width: 900px) {
            .site-header {
                top: 12px;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: absolute;
                top: calc(100% + 12px);
                left: 20px;
                right: 20px;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                border-radius: 20px;
                box-shadow: var(--shadow-nav);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 14px;
                opacity: 0;
                visibility: hidden;
                transform: translateY(-10px);
                transition: var(--transition-base);
            }
            .main-nav.open {
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
            .nav-link {
                padding: 12px 18px;
                font-size: 16px;
                border-radius: 12px;
                text-align: center;
            }
            .nav-link.active {
                box-shadow: none;
            }
        }

        @media (max-width: 480px) {
            .logo-text {
                font-size: 18px;
            }
            .logo-text small {
                font-size: 10px;
            }
            .site-header .nav-wrap {
                padding: 10px 14px;
                border-radius: 50px;
            }
            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }
        }

        /* ===== Hero / Banner ===== */
        .hero-category {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: calc(var(--header-h) + 60px) 24px 80px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
            text-align: center;
        }

        .hero-category::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(20, 42, 68, 0.92), rgba(30, 58, 95, 0.78) 50%, rgba(240, 97, 45, 0.42));
            z-index: 1;
        }

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

        .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 22px;
            padding: 8px 16px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.16);
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb i {
            font-size: 12px;
            opacity: 0.7;
        }

        .hero-category h1 {
            font-size: 54px;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 2px;
            text-shadow: 0 2px 30px rgba(0, 0, 0, 0.25);
        }

        .hero-category h1 span {
            color: var(--accent-light);
        }

        .hero-category .hero-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.9);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }

        .search-box {
            display: flex;
            align-items: center;
            max-width: 560px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.97);
            border-radius: 50px;
            padding: 6px 6px 6px 22px;
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.18);
            border: 1px solid rgba(255, 255, 255, 0.5);
            transition: var(--transition-base);
        }

        .search-box:focus-within {
            box-shadow: 0 0 0 4px rgba(240, 97, 45, 0.25), 0 8px 40px rgba(0, 0, 0, 0.2);
        }

        .search-box i {
            color: var(--text-sub);
            font-size: 16px;
            margin-right: 12px;
        }

        .search-box input {
            flex: 1;
            border: none;
            outline: none;
            font-size: 15px;
            padding: 10px 0;
            color: var(--text-main);
            background: transparent;
        }

        .search-box input::placeholder {
            color: var(--text-light);
        }

        .search-box button {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 26px;
            border-radius: 40px;
            letter-spacing: 0.5px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .search-box button:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
        }

        @media (max-width: 768px) {
            .hero-category {
                min-height: 460px;
                padding: calc(var(--header-h) + 30px) 16px 60px;
            }
            .hero-category h1 {
                font-size: 36px;
            }
            .hero-category .hero-sub {
                font-size: 15px;
            }
            .search-box {
                padding-left: 16px;
            }
            .search-box button {
                padding: 9px 18px;
                font-size: 13px;
            }
        }

        @media (max-width: 480px) {
            .hero-category h1 {
                font-size: 30px;
            }
            .search-box {
                flex-wrap: wrap;
                padding: 10px 14px;
                border-radius: 24px;
                gap: 8px;
            }
            .search-box input {
                flex: 1 1 100%;
                padding: 6px 0;
            }
            .search-box button {
                flex: 1 1 100%;
                text-align: center;
                justify-content: center;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 90px 0;
        }

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

        .section-head .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: 40px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .section-head .tag-badge i {
            font-size: 14px;
        }

        .section-head h2 {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

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

        /* ===== Tag Cloud ===== */
        .tag-filter-section {
            padding: 60px 0 0;
            margin-top: -30px;
        }

        .tag-cloud-wrap {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 26px 30px;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }

        .tag-label {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            margin-right: 6px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 40px;
            background: var(--bg-body);
            border: 1px solid var(--border-line);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition-base);
        }

        .tag-chip i {
            font-size: 13px;
            color: var(--text-light);
            transition: var(--transition-base);
        }

        .tag-chip:hover,
        .tag-chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(30, 58, 95, 0.25);
        }

        .tag-chip:hover i {
            color: rgba(255, 255, 255, 0.8);
        }

        /* ===== Guide Cards ===== */
        .guide-section {
            padding: 70px 0;
            background: linear-gradient(180deg, var(--bg-body) 0%, var(--bg-white) 100%);
        }

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

        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-line);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }

        .guide-card-media {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

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

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

        .guide-card-media .badge-top {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 30px;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 14px rgba(240, 97, 45, 0.4);
        }

        .guide-card-media .badge-top.blue {
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.35);
        }

        .guide-card-media .badge-top.green {
            background: #0f9d7a;
            box-shadow: 0 4px 14px rgba(15, 157, 122, 0.35);
        }

        .guide-card-body {
            padding: 24px 24px 26px;
        }

        .guide-card-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.45;
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

        .guide-card-body h3 a:hover {
            color: var(--accent);
        }

        .guide-card-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .guide-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-line);
        }

        .guide-card-meta .author {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-sub);
        }

        .guide-card-meta .author i {
            font-size: 22px;
            color: var(--primary-light);
        }

        .guide-card-meta .views {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-light);
        }

        .guide-card-meta .views i {
            font-size: 13px;
        }

        /* ===== Starter Guide ===== */
        .starter-section {
            padding: 80px 0;
            background: rgba(30, 58, 95, 0.03);
        }

        .starter-layout {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 60px;
            align-items: center;
        }

        .starter-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }

        .starter-visual img {
            width: 100%;
            height: 100%;
            min-height: 360px;
            object-fit: cover;
        }

        .starter-visual::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(20, 42, 68, 0.7));
        }

        .starter-visual .visual-caption {
            position: absolute;
            left: 24px;
            right: 24px;
            bottom: 20px;
            z-index: 2;
            color: #fff;
        }

        .visual-caption h4 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .visual-caption p {
            font-size: 14px;
            opacity: 0.85;
        }

        .starter-text .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 40px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 13px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .starter-text h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .starter-text>p {
            font-size: 16px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 30px;
        }

        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .step-item {
            display: flex;
            gap: 18px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            box-shadow: 0 2px 12px rgba(30, 58, 95, 0.04);
            border: 1px solid rgba(226, 232, 240, 0.6);
            transition: var(--transition-base);
        }

        .step-item:hover {
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }

        .step-num {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.3);
        }

        .step-item:nth-child(2) .step-num {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            box-shadow: 0 4px 14px rgba(240, 97, 45, 0.3);
        }

        .step-item:nth-child(3) .step-num {
            background: linear-gradient(135deg, #0f9d7a, #14b896);
            box-shadow: 0 4px 14px rgba(15, 157, 122, 0.3);
        }

        .step-item:nth-child(4) .step-num {
            background: linear-gradient(135deg, #7c5cbf, #9b7ee0);
            box-shadow: 0 4px 14px rgba(124, 92, 191, 0.3);
        }

        .step-info h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .step-info p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }

        /* ===== Advanced Tips ===== */
        .advanced-section {
            padding: 90px 0;
            background: var(--bg-white);
        }

        .adv-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 26px;
        }

        .adv-card {
            display: flex;
            gap: 20px;
            padding: 26px 28px;
            background: var(--bg-body);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-line);
            transition: var(--transition-base);
        }

        .adv-card:hover {
            background: var(--bg-white);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: transparent;
        }

        .adv-icon {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }

        .adv-card:hover .adv-icon {
            background: var(--accent);
            color: #fff;
        }

        .adv-card:nth-child(2) .adv-icon {
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
        }

        .adv-card:nth-child(2):hover .adv-icon {
            background: var(--primary);
            color: #fff;
        }

        .adv-card:nth-child(3) .adv-icon {
            background: rgba(15, 157, 122, 0.1);
            color: #0f9d7a;
        }

        .adv-card:nth-child(3):hover .adv-icon {
            background: #0f9d7a;
            color: #fff;
        }

        .adv-card:nth-child(4) .adv-icon {
            background: rgba(124, 92, 191, 0.1);
            color: #7c5cbf;
        }

        .adv-card:nth-child(4):hover .adv-icon {
            background: #7c5cbf;
            color: #fff;
        }

        .adv-content h3 {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .adv-content p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .adv-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .adv-tags span {
            font-size: 12px;
            padding: 3px 12px;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border-line);
            color: var(--text-sub);
            font-weight: 500;
        }

        /* ===== Stats Section ===== */
        .stats-section {
            position: relative;
            padding: 90px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            overflow: hidden;
        }

        .stats-section::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .stats-section::after {
            content: "";
            position: absolute;
            bottom: -60%;
            left: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(240, 97, 45, 0.12);
        }

        .stats-section .container {
            position: relative;
            z-index: 2;
        }

        .stats-section .section-head h2 {
            color: #fff;
        }

        .stats-section .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }

        .stats-section .tag-badge {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 26px;
        }

        .stat-box {
            text-align: center;
            padding: 36px 20px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            transition: var(--transition-base);
        }

        .stat-box:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }

        .stat-num {
            font-size: 44px;
            font-weight: 900;
            color: #fff;
            line-height: 1.1;
            margin-bottom: 6px;
            letter-spacing: 1px;
        }

        .stat-num sup {
            font-size: 24px;
            font-weight: 700;
            color: var(--accent-light);
            margin-left: 2px;
        }

        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 90px 0;
            background: var(--bg-body);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-line);
            box-shadow: 0 2px 10px rgba(30, 58, 95, 0.04);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(30, 58, 95, 0.15);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 26px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            transition: var(--transition-base);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: var(--transition-base);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #fff;
        }

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

        .faq-answer-inner {
            padding: 0 26px 24px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.85;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
        }

        .faq-item.active .faq-answer-inner {
            border-top-color: var(--border-line);
            padding-top: 16px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(120deg, rgba(240, 97, 45, 0.06), rgba(30, 58, 95, 0.05));
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            border-radius: 28px;
            padding: 60px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 18px 50px rgba(20, 42, 68, 0.3);
        }

        .cta-box::after {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(240, 97, 45, 0.25);
        }

        .cta-box::before {
            content: "";
            position: absolute;
            left: 30%;
            bottom: -120px;
            width: 300px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-text {
            position: relative;
            z-index: 2;
            flex: 1;
        }

        .cta-text h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .cta-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
            position: relative;
            z-index: 2;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--accent);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            border-radius: 50px;
            box-shadow: 0 6px 20px rgba(240, 97, 45, 0.35);
            transition: var(--transition-base);
            border: none;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(240, 97, 45, 0.45);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 30px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border-radius: 50px;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #111f33;
            padding-top: 70px;
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand h3 {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-links h4,
        .footer-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-links a {
            display: block;
            font-size: 14px;
            padding: 6px 0;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition-base);
        }

        .footer-links a:hover {
            color: var(--accent-light);
            padding-left: 6px;
        }

        .footer-info p {
            font-size: 14px;
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-info p i {
            color: var(--accent-light);
            font-size: 13px;
        }

        .footer-bottom {
            padding: 22px 0;
            background: rgba(0, 0, 0, 0.2);
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            letter-spacing: 0.5px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .starter-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .starter-visual img {
                min-height: 300px;
            }
            .cta-box {
                flex-direction: column;
                text-align: center;
                padding: 44px 30px;
            }
            .cta-actions {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .section-head {
                margin-bottom: 36px;
            }
            .section-head h2 {
                font-size: 30px;
            }
            .section-head p {
                font-size: 15px;
            }
            .adv-grid {
                grid-template-columns: 1fr;
            }
            .adv-card {
                padding: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-category {
                min-height: 440px;
            }
            .tag-cloud-wrap {
                padding: 20px;
            }
            .tag-chip {
                padding: 7px 14px;
                font-size: 13px;
            }
            .cta-box {
                padding: 36px 22px;
            }
            .cta-text h2 {
                font-size: 24px;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 12px 24px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-num {
                font-size: 34px;
            }
            .stat-box {
                padding: 24px 14px;
            }
            .hero-category h1 {
                font-size: 28px;
            }
            .hero-category .hero-sub {
                font-size: 14px;
            }
            .breadcrumb {
                font-size: 13px;
                padding: 6px 12px;
            }
            .step-item {
                padding: 16px;
                flex-direction: column;
                gap: 12px;
            }
            .step-num {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .faq-question {
                padding: 18px 18px;
                font-size: 15px;
            }
            .faq-answer-inner {
                padding: 0 18px 20px;
            }
            .footer-grid {
                gap: 30px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #e63b3b;
  --primary-dark: #c31230;
  --accent: #f5a623;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --dark: #12141c;
  --text: #1f2430;
  --muted: #5f6873;
  --border: #e4e7ee;
  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-sm: 0 4px 14px rgba(24, 28, 40, 0.06);
  --shadow-md: 0 14px 36px rgba(24, 28, 40, 0.08);
  --shadow-lg: 0 24px 60px rgba(24, 28, 40, 0.12);
  --space-section: 84px;
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 16px;
  z-index: 100;
  padding: 0 16px;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px 10px 16px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 60px;
  box-shadow: 0 10px 32px rgba(24, 28, 40, 0.1);
}

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

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 6px 16px rgba(230, 59, 59, 0.35);
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.2px;
  color: var(--text);
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  transition: background 0.25s ease, color 0.25s ease, transform 0.2s ease;
}

.nav-link:hover {
  background: rgba(230, 59, 59, 0.1);
  color: var(--primary);
}

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

.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(230, 59, 59, 0.28);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle:hover span {
  background: var(--primary);
}

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  margin: 32px 24px 0;
  border-radius: 28px;
  min-height: 360px;
  background:
    linear-gradient(118deg, rgba(15, 17, 26, 0.86) 0%, rgba(15, 17, 26, 0.62) 48%, rgba(15, 17, 26, 0.34) 100%),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  display: flex;
  align-items: center;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(245, 166, 35, 0.16) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  padding: 56px 48px;
  max-width: 680px;
}

.breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 30px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 22px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: #fff;
}

.hero-inner h1 {
  font-size: 40px;
  line-height: 1.25;
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.4px;
  margin-bottom: 16px;
}

.hero-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 26px;
  max-width: 560px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.92);
  font-size: 13px;
  font-weight: 500;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
}

.tag:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

/* ========== Section ========== */
.section {
  padding: var(--space-section) 0;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 42px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.3px;
  margin-bottom: 10px;
}

.section-head p {
  color: var(--muted);
  font-size: 15px;
}

/* ========== Filter Bar ========== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 22px;
  border-radius: 40px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(230, 59, 59, 0.04);
}

.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 8px 20px rgba(230, 59, 59, 0.22);
}

/* ========== News Grid ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.card-cover {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #e8eaee;
}

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

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

.card-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(18, 20, 28, 0.35) 100%);
}

.card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: 4px 12px;
  border-radius: 30px;
  background: rgba(230, 59, 59, 0.09);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 12px;
}

.card-body h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.card-body h3 a {
  transition: color 0.25s ease;
}

.card-body h3 a:hover {
  color: var(--primary);
}

.card-body p {
  font-size: 14px;
  color: var(--muted);
  flex: 1;
  margin-bottom: 16px;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  color: #9aa1ac;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

/* ========== Rank Section ========== */
.rank-section {
  background: var(--dark);
}

.rank-section .section-head h2 {
  color: #fff;
}

.rank-section .section-head p {
  color: rgba(255, 255, 255, 0.6);
}

.rank-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 18px 22px;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
}

.rank-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(230, 59, 59, 0.5);
  transform: translateX(6px);
}

.rank-num {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent);
  min-width: 44px;
  font-family: Georgia, serif;
}

.rank-content {
  flex: 1;
}

.rank-content h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.rank-content p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

.rank-tag {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.08);
  border-radius: 30px;
  padding: 4px 14px;
  white-space: nowrap;
}

/* ========== Feature Section ========== */
.feature-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 56px;
}

.feature-photo {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.feature-photo img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.feature-content .badge {
  margin-bottom: 18px;
}

.feature-content h2 {
  font-size: 30px;
  line-height: 1.3;
  font-weight: 800;
  margin-bottom: 18px;
}

.feature-content p {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(230, 59, 59, 0.25);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(195, 18, 48, 0.3);
}

.btn-light {
  background: #fff;
  color: var(--dark);
}

.btn-light:hover {
  background: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(245, 166, 35, 0.25);
}

/* ========== Stats Section ========== */
.stats-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 28px 18px;
  border-radius: 20px;
  transition: background 0.25s ease, transform 0.25s ease;
}

.stat-item:hover {
  background: rgba(230, 59, 59, 0.04);
  transform: translateY(-4px);
}

.stat-item strong {
  display: block;
  font-size: 40px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

.stat-item span {
  font-size: 14px;
  color: var(--muted);
}

/* ========== Timeline Section ========== */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 28px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 3px rgba(230, 59, 59, 0.15);
}

.timeline-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.timeline-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.timeline-time {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  display: block;
  margin-bottom: 6px;
  letter-spacing: 0.4px;
}

.timeline-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-card p {
  font-size: 14px;
  color: var(--muted);
}

/* ========== FAQ Section ========== */
.faq-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--surface);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item[open] {
  border-color: rgba(230, 59, 59, 0.3);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  transition: background 0.2s ease;
}

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

.faq-item summary::after {
  content: '+';
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(230, 59, 59, 0.08);
  color: var(--primary);
  font-size: 20px;
  font-weight: 600;
  transition: transform 0.3s ease, background 0.3s ease;
}

.faq-item[open] summary::after {
  content: '−';
  transform: rotate(180deg);
  background: var(--primary);
  color: #fff;
}

.faq-item summary:hover {
  background: rgba(230, 59, 59, 0.03);
}

.faq-item p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ========== CTA ========== */
.cta-section {
  padding-bottom: var(--space-section);
}

.cta-box {
  position: relative;
  background:
    linear-gradient(112deg, rgba(18, 20, 28, 0.92), rgba(18, 20, 28, 0.7)),
    url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  border-radius: 28px;
  padding: 64px 56px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 10%, rgba(230, 59, 59, 0.18) 0%, transparent 60%);
  pointer-events: none;
}

.cta-box h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.cta-box p {
  color: rgba(255, 255, 255, 0.74);
  font-size: 15px;
  margin-bottom: 28px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.72);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand h3 {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links h4,
.footer-info h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 18px;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.62);
  margin-bottom: 12px;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

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

.footer-info p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.52);
  margin-bottom: 10px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

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

  .feature-wrap {
    gap: 36px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .hero-inner h1 {
    font-size: 34px;
  }

  .page-hero {
    margin: 20px 16px 0;
    min-height: 320px;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 60px;
  }

  .main-nav {
    position: fixed;
    top: 84px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 24px;
    box-shadow: 0 20px 50px rgba(24, 28, 40, 0.18);
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  }

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

  .nav-toggle {
    display: inline-flex;
  }

  .nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-inner {
    padding: 44px 28px;
  }

  .hero-inner h1 {
    font-size: 28px;
  }

  .hero-inner p {
    font-size: 14px;
  }

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

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

  .news-card {
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
  }

  .feature-wrap {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .feature-photo img {
    height: 280px;
  }

  .feature-content h2 {
    font-size: 24px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .rank-item {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .rank-tag {
    align-self: flex-start;
  }

  .timeline {
    padding-left: 20px;
  }

  .cta-box {
    padding: 44px 24px;
  }

  .cta-box h2 {
    font-size: 26px;
  }
}

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

  .site-header {
    top: 8px;
    padding: 0 8px;
  }

  .nav-wrap {
    padding: 8px 14px;
  }

  .logo-text {
    font-size: 18px;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 18px;
    border-radius: 12px;
  }

  .page-hero {
    margin: 14px 8px 0;
    min-height: 300px;
    border-radius: 20px;
  }

  .hero-inner {
    padding: 36px 20px;
  }

  .hero-tags .tag {
    padding: 6px 12px;
    font-size: 12px;
  }

  .filter-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 8px;
    scrollbar-width: none;
  }

  .filter-bar::-webkit-scrollbar {
    display: none;
  }

  .filter-btn {
    white-space: nowrap;
  }

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

  .stat-item strong {
    font-size: 32px;
  }

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

  .cta-box {
    border-radius: 20px;
  }
}