/* roulang page: index */
:root {
  --primary: #0d1b3e;
  --primary-dark: #081228;
  --primary-light: #1d2f5e;
  --accent: #f0a63a;
  --accent-dark: #d68a1f;
  --accent-light: #fdeeda;
  --bg: #f4f6fb;
  --white: #ffffff;
  --text: #17233d;
  --text-light: #5d6b88;
  --border: #e2e6f0;
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 12px rgba(13,27,62,.06);
  --shadow: 0 8px 32px rgba(13,27,62,.10);
  --shadow-lg: 0 16px 48px rgba(13,27,62,.16);
  --transition: all .3s ease;
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-base); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button, input, select, textarea { font: inherit; color: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag { display: inline-block; padding: 6px 16px; background: var(--accent-light); color: var(--accent-dark); border-radius: 40px; font-size: 14px; font-weight: 600; letter-spacing: .5px; margin-bottom: 16px; }
.section-title { font-size: 2.4rem; line-height: 1.25; font-weight: 800; color: var(--primary); margin-bottom: 16px; letter-spacing: -0.5px; }
.section-subtitle { font-size: 1.08rem; color: var(--text-light); line-height: 1.7; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: .98rem; border: 2px solid transparent; transition: var(--transition); cursor: pointer; text-align: center; line-height: 1.4; }
.btn:focus-visible { outline: 3px solid rgba(240,166,58,.4); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 20px rgba(13,27,62,.25); }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(13,27,62,.32); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 14px rgba(13,27,62,.2); }
.btn-accent { background: var(--accent); color: var(--primary-dark); box-shadow: 0 6px 20px rgba(240,166,58,.35); }
.btn-accent:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(240,166,58,.42); }
.btn-accent:active { transform: translateY(0); }
.btn-outline { border-color: rgba(255,255,255,.6); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-small { padding: 10px 22px; font-size: .9rem; }

/* ===== Header ===== */
.site-header { background: rgba(255,255,255,.96); backdrop-filter: blur(12px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border); box-shadow: 0 4px 24px rgba(13,27,62,.04); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px 24px; max-width: 1280px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.14rem; font-weight: 800; color: var(--primary); white-space: nowrap; }
.logo i { color: var(--accent); font-size: 1.3rem; }
.logo span:last-child { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { padding: 10px 18px; border-radius: 40px; font-size: .95rem; font-weight: 500; color: var(--text); position: relative; }
.main-nav a:focus-visible { outline: 3px solid rgba(13,27,62,.25); outline-offset: 2px; }
.main-nav a:hover { color: var(--primary); background: var(--bg); }
.main-nav a.active { background: var(--primary); color: #fff; box-shadow: var(--shadow-sm); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.search-box { display: flex; align-items: center; background: var(--bg); border: 1px solid var(--border); border-radius: 40px; padding: 4px 6px 4px 18px; transition: var(--transition); }
.search-box:focus-within { border-color: var(--accent); background: #fff; box-shadow: 0 0 0 3px rgba(240,166,58,.15); }
.search-box input { border: none; background: transparent; outline: none; font-size: .9rem; color: var(--text); width: 150px; }
.search-box button { background: var(--accent); color: var(--primary-dark); border: none; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; transition: var(--transition); }
.search-box button:hover { background: var(--accent-dark); color: #fff; }
.nav-toggle { display: none; background: none; border: 1px solid var(--border); border-radius: 10px; padding: 8px 12px; font-size: 1.2rem; color: var(--primary); cursor: pointer; transition: var(--transition); }
.nav-toggle:hover { background: var(--bg); }

/* ===== Hero ===== */
.hero { position: relative; background-size: cover; background-position: center; padding: 140px 0 120px; display: flex; align-items: center; overflow: hidden; }
.hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(8,18,40,.93) 0%, rgba(13,27,62,.78) 45%, rgba(13,27,62,.55) 100%); }
.hero::after { content: ''; position: absolute; bottom: -60px; right: -60px; width: 320px; height: 320px; border-radius: 50%; background: rgba(240,166,58,.18); filter: blur(60px); }
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22); border-radius: 40px; padding: 8px 20px; font-size: .85rem; color: #ffd28a; font-weight: 600; margin-bottom: 24px; letter-spacing: .5px; }
.hero-badge i { font-size: .9rem; }
.hero-title { font-size: 3.4rem; line-height: 1.2; font-weight: 800; color: #fff; margin-bottom: 20px; letter-spacing: -1px; }
.hero-title .highlight { color: var(--accent); }
.hero-subtitle { font-size: 1.14rem; color: rgba(255,255,255,.82); line-height: 1.8; margin-bottom: 36px; max-width: 600px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-metrics { display: flex; gap: 36px; margin-top: 48px; padding-top: 36px; border-top: 1px solid rgba(255,255,255,.14); }
.hero-metric { display: flex; flex-direction: column; }
.hero-metric strong { font-size: 1.9rem; font-weight: 800; color: var(--accent); line-height: 1.2; }
.hero-metric span { font-size: .85rem; color: rgba(255,255,255,.7); }

/* ===== Intro ===== */
.intro { background: var(--white); }
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.intro-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); position: relative; }
.intro-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(13,27,62,.4)); }
.intro-img img { width: 100%; height: 400px; object-fit: cover; }
.intro-content h2 { font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 20px; line-height: 1.3; }
.intro-content p { color: var(--text-light); font-size: 1rem; line-height: 1.8; margin-bottom: 16px; }
.intro-list { list-style: none; margin: 24px 0 0; padding: 0; }
.intro-list li { display: flex; align-items: flex-start; gap: 12px; padding: 12px 0; border-bottom: 1px dashed var(--border); font-size: .96rem; }
.intro-list li:last-child { border-bottom: none; }
.intro-list i { color: var(--accent); margin-top: 4px; font-size: 1rem; }

/* ===== Categories ===== */
.categories { background: var(--bg); }
.cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.cat-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); position: relative; display: flex; flex-direction: column; }
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.cat-card-img { position: relative; height: 220px; overflow: hidden; }
.cat-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.cat-card:hover .cat-card-img img { transform: scale(1.05); }
.cat-card-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(13,27,62,.6)); }
.cat-card-body { padding: 28px; display: flex; flex-direction: column; flex-grow: 1; }
.cat-card-body h3 { font-size: 1.4rem; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.cat-card-body p { color: var(--text-light); font-size: .95rem; line-height: 1.7; margin-bottom: 20px; flex-grow: 1; }
.cat-card-link { display: inline-flex; align-items: center; gap: 8px; color: var(--accent-dark); font-weight: 600; font-size: .95rem; margin-top: auto; }
.cat-card-link i { transition: transform .3s ease; }
.cat-card-link:hover i { transform: translateX(4px); }
.cat-badge { position: absolute; top: 16px; left: 16px; z-index: 2; background: rgba(13,27,62,.85); color: #fff; padding: 6px 14px; border-radius: 30px; font-size: .78rem; backdrop-filter: blur(6px); }

/* ===== Features ===== */
.features { background: var(--primary); position: relative; overflow: hidden; }
.features::before { content: ''; position: absolute; top: -100px; right: -100px; width: 300px; height: 300px; border-radius: 50%; background: rgba(240,166,58,.12); filter: blur(60px); }
.features .section-title { color: #fff; }
.features .section-subtitle { color: rgba(255,255,255,.65); }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; z-index: 2; }
.feature-card { background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius); padding: 32px 24px; text-align: center; transition: var(--transition); backdrop-filter: blur(4px); }
.feature-card:hover { background: rgba(255,255,255,.13); transform: translateY(-4px); }
.feature-icon { width: 64px; height: 64px; border-radius: 20px; background: var(--accent); color: var(--primary-dark); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin: 0 auto 20px; box-shadow: 0 8px 24px rgba(240,166,58,.3); }
.feature-card h3 { color: #fff; font-size: 1.1rem; font-weight: 600; margin-bottom: 12px; }
.feature-card p { color: rgba(255,255,255,.62); font-size: .88rem; line-height: 1.7; }

/* ===== Posts ===== */
.posts { background: var(--white); }
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.post-card { background: var(--bg); border-radius: var(--radius); padding: 28px; display: flex; flex-direction: column; border: 1px solid var(--border); transition: var(--transition); }
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); background: #fff; border-color: transparent; }
.post-card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.post-cat { display: inline-block; background: var(--accent-light); color: var(--accent-dark); font-size: .78rem; font-weight: 600; padding: 4px 12px; border-radius: 20px; }
.post-date { font-size: .8rem; color: var(--text-light); }
.post-card h3 { font-size: 1.12rem; font-weight: 700; color: var(--primary); line-height: 1.5; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card p { font-size: .88rem; color: var(--text-light); line-height: 1.7; margin-bottom: 20px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; flex-grow: 1; }
.post-more { font-size: .88rem; color: var(--primary); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.post-more i { transition: transform .3s ease; }
.post-card:hover .post-more i { transform: translateX(4px); }
.no-posts { grid-column: 1 / -1; text-align: center; color: var(--text-light); background: var(--bg); border-radius: var(--radius); padding: 60px 20px; font-size: 1rem; }

/* ===== Stats ===== */
.stats { background: var(--bg); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { background: var(--white); border-radius: var(--radius); padding: 40px 24px; text-align: center; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); }
.stat-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-icon { width: 52px; height: 52px; border-radius: 16px; background: var(--primary); color: var(--accent); display: inline-flex; align-items: center; justify-content: center; font-size: 1.2rem; margin-bottom: 16px; }
.stat-item strong { font-size: 2.4rem; font-weight: 800; color: var(--primary); display: block; line-height: 1.2; }
.stat-item span { font-size: .9rem; color: var(--text-light); margin-top: 6px; display: block; }

/* ===== Process ===== */
.process { background: var(--white); position: relative; }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; }
.process-grid::before { content: ''; position: absolute; top: 40px; left: 12%; right: 12%; height: 2px; background: linear-gradient(90deg, var(--accent), var(--border), var(--accent)); border-radius: 2px; }
.process-step { text-align: center; position: relative; z-index: 2; }
.process-step-num { width: 80px; height: 80px; border-radius: 50%; background: var(--primary); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 1.8rem; font-weight: 800; margin: 0 auto 20px; box-shadow: 0 8px 24px rgba(13,27,62,.25); border: 4px solid var(--white); position: relative; }
.process-step h3 { font-size: 1.1rem; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.process-step p { font-size: .88rem; color: var(--text-light); line-height: 1.7; max-width: 220px; margin: 0 auto; }

/* ===== FAQ ===== */
.faq { background: var(--bg); }
.faq-item { background: var(--white); border-radius: var(--radius); padding: 24px 28px; margin-bottom: 16px; border: 1px solid var(--border); box-shadow: var(--shadow-sm); transition: var(--transition); }
.faq-item:hover { border-color: var(--accent); box-shadow: var(--shadow); }
.faq-item summary { cursor: pointer; font-size: 1.05rem; font-weight: 600; color: var(--primary); outline: none; line-height: 1.5; padding: 4px 0; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before { content: '+'; display: inline-block; width: 28px; height: 28px; border-radius: 50%; background: var(--accent-light); color: var(--accent-dark); text-align: center; line-height: 28px; font-size: 1rem; font-weight: 700; margin-right: 14px; transition: var(--transition); }
.faq-item[open] summary::before { transform: rotate(45deg); background: var(--accent); color: #fff; }
.faq-item p { margin: 16px 0 0 42px; color: var(--text-light); font-size: .95rem; line-height: 1.8; }

/* ===== CTA ===== */
.cta { position: relative; background-size: cover; background-position: center; padding: 100px 0; overflow: hidden; }
.cta::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(8,18,40,.95), rgba(13,27,62,.85)); }
.cta-box { position: relative; z-index: 2; text-align: center; max-width: 700px; margin: 0 auto; }
.cta-box h2 { font-size: 2.6rem; font-weight: 800; color: #fff; margin-bottom: 20px; line-height: 1.3; }
.cta-box h2 span { color: var(--accent); }
.cta-box p { color: rgba(255,255,255,.75); font-size: 1.05rem; margin-bottom: 36px; line-height: 1.8; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: var(--primary-dark); color: rgba(255,255,255,.7); padding: 80px 0 0; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 56px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: .9rem; line-height: 1.7; max-width: 340px; }
.footer-brand .social-links { display: flex; gap: 12px; margin-top: 24px; }
.footer-brand .social-links a { width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; font-size: .9rem; color: rgba(255,255,255,.7); transition: var(--transition); }
.footer-brand .social-links a:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-3px); }
.footer-col h4 { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 20px; }
.footer-col a { display: block; padding: 6px 0; font-size: .9rem; color: rgba(255,255,255,.65); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 24px 0; font-size: .85rem; color: rgba(255,255,255,.45); flex-wrap: wrap; gap: 12px; }
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .intro-grid { gap: 32px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .post-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .process-grid::before { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 1.9rem; }
  .nav-toggle { display: block; }
  .main-nav { position: fixed; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: stretch; padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); display: none; z-index: 99; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 14px 16px; border-radius: 12px; }
  .header-actions { display: none; }
  .header-actions.open { position: fixed; top: 64px; left: 0; right: 0; background: #fff; display: flex; flex-direction: column; padding: 16px 24px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); z-index: 99; }
  .header-actions.open .search-box { width: 100%; }
  .header-actions.open .search-box input { flex-grow: 1; width: auto; }
  .hero { padding: 100px 0 80px; }
  .hero-title { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-metrics { flex-wrap: wrap; gap: 20px; }
  .intro-grid { grid-template-columns: 1fr; }
  .intro-img img { height: 280px; }
  .cat-grid { grid-template-columns: 1fr; }
  .post-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-item { padding: 28px 16px; }
  .stat-item strong { font-size: 1.8rem; }
  .process-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-box h2 { font-size: 2rem; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
  .logo { font-size: 1rem; }
  .header-inner { padding: 12px 16px; }
  .hero-title { font-size: 1.8rem; }
  .hero-badge { font-size: .78rem; padding: 6px 14px; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .process-step p { max-width: 100%; }
  .faq-item { padding: 20px; }
  .cta-box h2 { font-size: 1.7rem; }
  .cta-actions .btn { width: 100%; }
}

/* roulang page: category1 */
/* ===== Design Tokens ===== */
        :root {
            --primary: #0d2b45;
            --primary-dark: #081d30;
            --primary-light: #164a72;
            --accent: #f0a500;
            --accent-dark: #d18f00;
            --bg: #f5f7fb;
            --bg-white: #ffffff;
            --text: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 10px 40px rgba(13, 43, 69, 0.08);
            --shadow-lg: 0 20px 60px rgba(13, 43, 69, 0.14);
            --transition: all 0.3s ease;
            --container-width: 1200px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 16px rgba(13, 43, 69, 0.04);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 78px;
            gap: 20px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo i {
            width: 42px;
            height: 42px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 12px;
            font-size: 19px;
        }
        .logo span {
            background: linear-gradient(120deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav a {
            padding: 10px 18px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .main-nav a:hover {
            background: rgba(13, 43, 69, 0.05);
            color: var(--primary);
        }
        .main-nav a.active {
            background: var(--primary);
            color: #fff;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #f1f4f9;
            border-radius: 40px;
            padding: 0 6px 0 16px;
            height: 42px;
            width: 220px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--accent);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(240, 165, 0, 0.15);
        }
        .search-box input {
            flex: 1;
            background: transparent;
            font-size: 14px;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: #94a3b8;
        }
        .search-box button {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            cursor: pointer;
            transition: var(--transition);
            font-size: 13px;
        }
        .search-box button:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(13, 43, 69, 0.06);
            color: var(--primary);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 700;
            border-radius: 50px;
            padding: 13px 28px;
            font-size: 15px;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(13, 43, 69, 0.3);
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #ffb62e);
            color: var(--primary-dark);
        }
        .btn-accent:hover {
            background: linear-gradient(135deg, var(--accent-dark), var(--accent));
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(240, 165, 0, 0.35);
        }
        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-small {
            padding: 9px 20px;
            font-size: 13px;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary) 55%, var(--primary-light));
            padding: 100px 0 90px;
            overflow: hidden;
            isolation: isolate;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.22;
            z-index: -2;
        }
        .page-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 80% 20%, rgba(240, 165, 0, 0.15), transparent 60%);
            z-index: -1;
        }
        .page-hero .hero-inner {
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
            color: #fff;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            color: #f5d78e;
            margin-bottom: 22px;
            backdrop-filter: blur(8px);
        }
        .hero-badge i {
            font-size: 12px;
        }
        .page-hero h1 {
            font-size: 48px;
            font-weight: 900;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 18px;
        }
        .page-hero h1 .highlight {
            color: var(--accent);
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .breadcrumb {
            margin-top: 28px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            margin: 0 8px;
            opacity: 0.5;
        }

        /* ===== Sections ===== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(240, 165, 0, 0.1);
            padding: 6px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 680px;
            line-height: 1.8;
        }
        .text-center {
            text-align: center;
        }
        .text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Steps Section ===== */
        .steps-section {
            padding: 90px 0;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 48px;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 34px 26px;
            position: relative;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }
        .step-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(240, 165, 0, 0.4);
        }
        .step-num {
            position: absolute;
            top: -16px;
            left: 50%;
            transform: translateX(-50%);
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(13, 43, 69, 0.3);
        }
        .step-icon {
            width: 60px;
            height: 60px;
            margin: 12px auto 18px;
            background: linear-gradient(135deg, rgba(240, 165, 0, 0.12), rgba(13, 43, 69, 0.06));
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary);
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== Resource Cards ===== */
        .resource-section {
            padding: 90px 0;
            background: var(--bg);
        }
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 44px;
        }
        .resource-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .resource-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .card-thumb {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .resource-card:hover .card-thumb img {
            transform: scale(1.06);
        }
        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 800;
            padding: 5px 12px;
            border-radius: 30px;
            z-index: 2;
        }
        .card-body {
            padding: 26px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 18px;
        }
        .card-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link:hover {
            color: var(--primary);
            gap: 10px;
        }

        /* ===== Notice Section ===== */
        .notice-section {
            padding: 90px 0;
            position: relative;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            overflow: hidden;
            isolation: isolate;
        }
        .notice-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: -2;
        }
        .notice-wrap {
            max-width: 1100px;
            margin: 0 auto;
        }
        .notice-title {
            text-align: center;
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .notice-subtitle {
            text-align: center;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 44px;
            font-size: 16px;
        }
        .notice-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .notice-card {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius);
            padding: 28px 22px;
            text-align: center;
            transition: var(--transition);
            backdrop-filter: blur(6px);
        }
        .notice-card:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-6px);
        }
        .notice-card i {
            font-size: 30px;
            color: var(--accent);
            margin-bottom: 14px;
        }
        .notice-card h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .notice-card p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
            line-height: 1.7;
        }

        /* ===== Guide List ===== */
        .guide-list-section {
            padding: 90px 0;
        }
        .guide-holder {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }
        .guide-list {
            margin-top: 24px;
        }
        .guide-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
        }
        .guide-item:last-child {
            border-bottom: none;
        }
        .guide-item:hover {
            padding-left: 12px;
        }
        .guide-index {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            background: rgba(13, 43, 69, 0.08);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            color: var(--primary);
            transition: var(--transition);
        }
        .guide-item:hover .guide-index {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .guide-content h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .guide-content p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }
        .guide-visual {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .guide-visual img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        .guide-visual .visual-tag {
            position: absolute;
            bottom: 18px;
            left: 18px;
            background: rgba(255, 255, 255, 0.95);
            padding: 12px 18px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 90px 0;
            background: var(--bg-white);
        }
        .faq-list {
            max-width: 820px;
            margin: 44px auto 0;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            background: #fff;
            transition: var(--transition);
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: rgba(240, 165, 0, 0.4);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            background: transparent;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-dark);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-weak);
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            padding: 0 24px;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.8;
            border-top: 1px solid transparent;
        }
        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 16px 24px 22px;
        }
        .faq-item.open {
            box-shadow: var(--shadow);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            position: relative;
            background: linear-gradient(120deg, #fdf6e7, #fff);
        }
        .cta-box {
            max-width: 960px;
            margin: 0 auto;
            background: var(--bg-white);
            border-radius: 28px;
            border: 1px solid var(--border);
            padding: 50px 60px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.18), transparent 70%);
            border-radius: 50%;
        }
        .cta-box h2 {
            font-size: 32px;
            color: var(--primary);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--text-weak);
            margin-bottom: 30px;
            max-width: 580px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 70px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 0.7fr 0.9fr;
            gap: 50px;
            padding-bottom: 46px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .logo i {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .footer-brand .logo span {
            background: none;
            -webkit-text-fill-color: #fff;
            background-clip: unset;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 22px;
            max-width: 340px;
        }
        .social-links {
            display: flex;
            gap: 12px;
        }
        .social-links a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            font-size: 17px;
            transition: var(--transition);
        }
        .social-links a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 6px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .notice-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .resource-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .guide-holder {
                grid-template-columns: 1fr;
            }
            .guide-visual img {
                height: 300px;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 14px 20px;
                gap: 12px;
            }
            .main-nav {
                order: 3;
                flex-basis: 100%;
                display: none;
                flex-direction: column;
                background: #fff;
                border-radius: 14px;
                padding: 14px;
                box-shadow: var(--shadow);
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-radius: 10px;
            }
            .header-actions {
                margin-left: auto;
            }
            .search-box {
                width: 180px;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .section {
                padding: 60px 0;
            }
            .steps-section,
            .resource-section,
            .notice-section,
            .guide-list-section,
            .faq-section,
            .cta-section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 27px;
            }
            .notice-title {
                font-size: 26px;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 25px;
            }
            .footer-top {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 520px) {
            .steps-grid,
            .notice-cards,
            .resource-grid {
                grid-template-columns: 1fr;
            }
            .page-hero {
                padding: 70px 0;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .search-box {
                display: none;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Focus states ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(240, 165, 0, 0.6);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .btn:active {
            transform: scale(0.97);
        }

/* roulang page: category2 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #60a5fa;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg: #f6f8fc;
            --bg-deep: #0b1220;
            --surface: #ffffff;
            --text: #0f172a;
            --text-muted: #546577;
            --border: #e3e8f0;
            --radius: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
            --transition: all 0.25s ease;
            --font-base: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --container-w: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

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

        .text-center {
            text-align: center;
        }

        .text-accent {
            color: var(--accent);
        }

        .section-block {
            padding: 88px 0;
        }

        .section-head {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
        }

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

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

        .section-head.light p {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-tag {
            display: inline-block;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .badge {
            display: inline-block;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 999px;
            line-height: 1.6;
        }

        .badge-light {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }

        /* ============ Header ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
        }

        .header-inner {
            max-width: var(--container-w);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding: 0 24px;
            gap: 20px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo i {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            box-shadow: 0 6px 14px rgba(37, 99, 235, 0.28);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav a {
            padding: 10px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: 999px;
            transition: var(--transition);
            position: relative;
        }

        .main-nav a:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }

        .main-nav a.active {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.1);
            font-weight: 600;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border: 1px solid transparent;
            border-radius: 999px;
            padding: 4px 6px 4px 16px;
            transition: var(--transition);
            width: 220px;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--text);
            width: 100%;
            flex: 1;
        }

        .search-box input::placeholder {
            color: #94a3b8;
        }

        .search-box button {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: 13px;
            transition: var(--transition);
        }

        .search-box button:hover {
            background: var(--primary-dark);
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: #f1f5f9;
            color: var(--text);
            font-size: 18px;
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            transition: var(--transition);
            cursor: pointer;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(37, 99, 235, 0.32);
            color: #fff;
        }

        .btn-outline {
            border: 2px solid var(--border);
            color: var(--text);
            background: transparent;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(37, 99, 235, 0.04);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #0f172a;
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.25);
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }

        /* ============ Category Hero ============ */
        .category-hero {
            position: relative;
            padding: 110px 0 96px;
            background-size: cover;
            background-position: center;
            color: #fff;
            overflow: hidden;
        }

        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(7, 15, 33, 0.92) 0%, rgba(16, 28, 58, 0.78) 55%, rgba(37, 99, 235, 0.45) 100%);
            z-index: 1;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }

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

        .breadcrumb i {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.4);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 14px;
            padding: 8px 18px;
            border-radius: 999px;
            margin-bottom: 24px;
        }

        .hero-badge i {
            color: var(--accent);
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            max-width: 720px;
        }

        .category-hero p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin-bottom: 40px;
        }

        .hero-stats {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(8px);
            border-radius: var(--radius);
            padding: 18px 28px;
            min-width: 140px;
            text-align: center;
        }

        .stat-card strong {
            display: block;
            font-size: 26px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-card span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.75);
        }

        /* ============ Intro ============ */
        .cat-intro .section-tag {
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent-dark);
        }

        .cat-intro p {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-muted);
            margin-top: 16px;
        }

        /* ============ Service Card ============ */
        .cat-cards {
            padding-top: 20px;
        }

        .service-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            opacity: 0;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(37, 99, 235, 0.2);
        }

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

        .card-icon {
            width: 58px;
            height: 58px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(37, 99, 235, 0.04));
            border-radius: 16px;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 22px;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .service-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
            flex: 1;
        }

        .card-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin: 18px 0 16px;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .card-link i {
            transition: transform 0.2s ease;
        }

        .card-link:hover {
            color: var(--primary-dark);
        }

        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ============ Feature Panel ============ */
        .cat-features {
            background: linear-gradient(180deg, #f6f8fc 0%, #fff 100%);
        }

        .feature-panel {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            height: 100%;
            transition: var(--transition);
            position: relative;
            box-shadow: var(--shadow-sm);
        }

        .feature-panel:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.18);
        }

        .feature-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(16, 185, 129, 0.1);
            color: #059669;
            border-radius: 999px;
            padding: 4px 12px;
            margin-bottom: 20px;
        }

        .feature-status i {
            font-size: 8px;
        }

        .feature-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 16px;
        }

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

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

        .feature-panel .code-line {
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 12px;
            color: #94a3b8;
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 10px 14px;
            margin-top: 18px;
            word-break: break-all;
        }

        /* ============ Post Card ============ */
        .cat-articles {
            background: var(--surface);
        }

        .cat-articles .section-head p {
            margin-top: 4px;
        }

        .post-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.16);
        }

        .post-cover {
            aspect-ratio: 16 / 10;
            overflow: hidden;
        }

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

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

        .post-body {
            padding: 26px 26px 30px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .post-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .post-body h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }

        .post-body h3 a {
            color: var(--text);
        }

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

        .post-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            flex: 1;
        }

        .text-link {
            margin-top: 18px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .text-link i {
            transition: transform 0.2s ease;
        }

        .text-link:hover {
            color: var(--primary-dark);
        }

        .text-link:hover i {
            transform: translateX(4px);
        }

        /* ============ Process ============ */
        .cat-process {
            position: relative;
            background-size: cover;
            background-position: center;
            color: #fff;
        }

        .cat-process::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(8, 15, 34, 0.94), rgba(18, 32, 66, 0.86));
        }

        .cat-process .container {
            position: relative;
            z-index: 2;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .step-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            transition: var(--transition);
            position: relative;
        }

        .step-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-6px);
        }

        .step-num {
            font-size: 40px;
            font-weight: 800;
            color: rgba(255, 255, 255, 0.16);
            line-height: 1;
            margin-bottom: 18px;
            font-family: "SFMono-Regular", Consolas, monospace;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

        .step-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.72);
            line-height: 1.7;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -22px;
            transform: translateY(-50%);
            color: var(--accent);
            font-size: 16px;
            z-index: 3;
        }

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

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 18px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.25);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 22px 26px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            width: 100%;
            text-align: left;
            cursor: pointer;
            line-height: 1.5;
            transition: var(--transition);
        }

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

        .faq-question .faq-icon {
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(37, 99, 235, 0.08);
            border-radius: 50%;
            color: var(--primary);
            font-size: 13px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

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

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

        .faq-answer-inner {
            padding: 0 26px 24px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 18px;
        }

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

        /* ============ CTA ============ */
        .cat-cta {
            padding-bottom: 88px;
        }

        .cta-card {
            background: linear-gradient(135deg, #1d4ed8, #2563eb 55%, #3b82f6);
            border-radius: 32px;
            padding: 64px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: 0 24px 60px rgba(37, 99, 235, 0.3);
        }

        .cta-card::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-card::after {
            content: "";
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .cta-icon {
            width: 68px;
            height: 68px;
            margin: 0 auto 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.16);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            font-size: 28px;
            color: var(--accent);
        }

        .cta-card h2 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-card p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

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

        .cta-buttons .btn-outline {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .cta-buttons .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.72);
            padding: 72px 0 32px;
            border-radius: 32px 32px 0 0;
        }

        .site-footer .container {
            max-width: var(--container-w);
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .footer-brand .logo i {
            background: rgba(255, 255, 255, 0.1);
            box-shadow: none;
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
        }

        .social-links {
            display: flex;
            gap: 12px;
        }

        .social-links a {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 12px;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
        }

        .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 6px 0;
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 28px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }

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

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .section-block {
                padding: 70px 0;
            }

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

            .step-arrow {
                display: none;
            }

            .category-hero h1 {
                font-size: 38px;
            }

            .footer-top {
                gap: 32px;
            }
        }

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

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

            .main-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                flex-direction: column;
                align-items: stretch;
                padding: 12px;
                gap: 4px;
                transform: translateY(-140%);
                transition: transform 0.35s ease;
                z-index: 99;
            }

            .main-nav.nav-open {
                transform: translateY(0);
            }

            .main-nav a {
                border-radius: 12px;
                padding: 14px 18px;
                font-size: 16px;
            }

            .header-actions {
                display: none;
                position: absolute;
                top: 64px;
                right: 0;
                left: 0;
                background: #fff;
                padding: 16px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                flex-direction: column;
                align-items: stretch;
                gap: 12px;
                transform: translateY(-160%);
                transition: transform 0.35s ease;
                z-index: 98;
            }

            .header-actions.actions-open {
                transform: translateY(0);
                display: flex;
            }

            .header-actions .search-box {
                width: 100%;
            }

            .header-actions .btn {
                justify-content: center;
            }

            .category-hero {
                padding: 84px 0 70px;
            }

            .category-hero h1 {
                font-size: 32px;
            }

            .category-hero p {
                font-size: 15px;
            }

            .hero-stats {
                gap: 12px;
            }

            .stat-card {
                padding: 14px 20px;
                min-width: 110px;
            }

            .stat-card strong {
                font-size: 20px;
            }

            .section-head h2 {
                font-size: 28px;
            }

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

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

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

            .header-inner {
                padding: 0 16px;
                gap: 10px;
            }

            .logo span {
                font-size: 15px;
                max-width: 200px;
                white-space: normal;
                line-height: 1.3;
            }

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

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

            .section-block {
                padding: 56px 0;
            }

            .section-head h2 {
                font-size: 24px;
            }

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

            .service-card,
            .feature-panel {
                padding: 24px 20px;
            }

            .post-body {
                padding: 20px;
            }

            .cta-card {
                padding: 44px 20px;
                border-radius: 24px;
            }

            .cta-card h2 {
                font-size: 24px;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: article */
:root {
  --primary: #2a6df4;
  --primary-dark: #1756d4;
  --primary-light: #eaf1fe;
  --accent: #00c389;
  --accent-dark: #00a06e;
  --accent-light: #e6faf3;
  --dark: #0b1b33;
  --text: #20304a;
  --text-light: #64748b;
  --bg: #f6f9fc;
  --white: #ffffff;
  --border: #e2e9f2;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(11, 27, 51, 0.06);
  --shadow-md: 0 10px 30px rgba(11, 27, 51, 0.09);
  --shadow-lg: 0 20px 50px rgba(11, 27, 51, 0.14);
  --transition: all .3s cubic-bezier(.4, 0, .2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif; background: var(--bg); color: var(--text); line-height: 1.75; font-size: 15px; }
a { color: inherit; }
img { max-width: 100%; display: inline-block; vertical-align: middle; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }
input[type="search"]::-webkit-search-decoration,
input[type="search"]::-webkit-search-cancel-button,
input[type="search"]::-webkit-search-results-button,
input[type="search"]::-webkit-search-results-decoration { -webkit-appearance: none; }
::selection { background: var(--primary); color: #fff; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 26px; border-radius: 999px; font-weight: 700; font-size: 15px; text-decoration: none; transition: var(--transition); border: 2px solid transparent; cursor: pointer; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(42, 109, 244, 0.25); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(42, 109, 244, 0.35); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 8px 20px rgba(0, 195, 137, 0.22); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0, 195, 137, 0.32); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-small { padding: 8px 18px; font-size: 14px; }
.btn-light { background: rgba(255, 255, 255, 0.12); color: #fff; border-color: rgba(255, 255, 255, 0.45); backdrop-filter: blur(4px); }
.btn-light:hover { background: rgba(255, 255, 255, 0.22); border-color: #fff; transform: translateY(-2px); }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); box-shadow: 0 2px 16px rgba(11, 27, 51, 0.05); }
.header-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--dark); text-decoration: none; line-height: 1.3; letter-spacing: -0.2px; }
.logo i { color: var(--primary); font-size: 26px; transition: transform .3s ease; }
.logo:hover i { transform: rotate(-8deg) scale(1.08); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { padding: 10px 18px; border-radius: 999px; font-weight: 600; font-size: 14.5px; color: var(--text); text-decoration: none; transition: var(--transition); }
.main-nav a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav a.active { color: #fff; background: var(--primary); box-shadow: 0 6px 16px rgba(42, 109, 244, 0.3); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.search-box { display: flex; align-items: center; background: var(--bg); border: 1px solid var(--border); border-radius: 999px; padding: 4px 6px 4px 16px; transition: var(--transition); }
.search-box:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(42, 109, 244, 0.12); background: var(--white); }
.search-box input[type="search"] { border: none; outline: none; background: transparent; font-size: 14px; width: 150px; color: var(--text); box-shadow: none; margin: 0; }
.search-box input[type="search"]:focus { border: none; box-shadow: none; }
.search-box button { width: 34px; height: 34px; border-radius: 50%; background: var(--primary); border: none; color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: var(--transition); padding: 0; }
.search-box button:hover { background: var(--primary-dark); transform: scale(1.05); }
.search-box button:focus { outline: 3px solid rgba(42, 109, 244, 0.25); }
.nav-toggle { display: none; width: 40px; height: 40px; border-radius: 10px; background: var(--primary-light); border: none; color: var(--primary); font-size: 17px; align-items: center; justify-content: center; cursor: pointer; transition: var(--transition); padding: 0; }
.nav-toggle:hover { background: #dce7fc; }
.nav-toggle:focus { outline: 3px solid rgba(42, 109, 244, 0.22); }
.article-hero { position: relative; padding: 80px 0; background-size: cover; background-position: center; color: #fff; overflow: hidden; }
.article-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(6, 18, 40, 0.9), rgba(10, 30, 60, 0.55)); }
.article-hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 820px; }
.badge { display: inline-flex; align-items: center; gap: 7px; padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 700; background: rgba(255, 255, 255, 0.16); color: #fff; border: 1px solid rgba(255, 255, 255, 0.28); backdrop-filter: blur(4px); }
.article-hero h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.3; font-weight: 800; margin: 20px 0 16px; letter-spacing: -0.4px; text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15); }
.hero-desc { font-size: 16px; line-height: 1.8; color: rgba(255, 255, 255, 0.82); max-width: 680px; margin-bottom: 20px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; color: rgba(255, 255, 255, 0.85); }
.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-section { padding: 30px 0 72px; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 9px; padding: 22px 0 28px; font-size: 14px; color: var(--text-light); }
.breadcrumb a { color: var(--text-light); text-decoration: none; transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i.fas.fa-chevron-right { font-size: 11px; color: #b0b8c4; }
.breadcrumb span { color: var(--text); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 320px; }
.article-main { padding-bottom: 20px; }
.article-body { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 44px 48px; box-shadow: var(--shadow-sm); }
.article-body h2, .article-body h3, .article-body h4, .article-body h5, .article-body h6 { margin-top: 34px; margin-bottom: 14px; font-weight: 700; color: var(--dark); line-height: 1.45; }
.article-body h2 { font-size: 26px; padding-bottom: 12px; border-bottom: 2px solid var(--bg); }
.article-body h3 { font-size: 21px; }
.article-body h4 { font-size: 18px; }
.article-body p { margin-bottom: 18px; font-size: 16px; line-height: 1.95; color: #334155; }
.article-body ul, .article-body ol { margin: 0 0 22px 26px; }
.article-body ul li, .article-body ol li { margin-bottom: 8px; line-height: 1.85; color: #334155; }
.article-body ul li::marker { color: var(--primary); }
.article-body ol li::marker { color: var(--primary); font-weight: 700; }
.article-body img { max-width: 100%; border-radius: var(--radius-md); margin: 22px 0; box-shadow: var(--shadow-sm); }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--primary-dark); }
.article-body blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 18px 22px; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 24px 0; color: #314e7d; }
.article-body blockquote p { margin-bottom: 0; color: #314e7d; }
.article-body code { background: #eef2f7; padding: 2px 8px; border-radius: 6px; font-size: 0.9em; color: #c026d3; }
.article-body pre { background: var(--dark); color: #e2e8f0; padding: 20px 22px; border-radius: var(--radius-md); overflow-x: auto; margin: 24px 0; line-height: 1.7; font-size: 14px; }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-body table th, .article-body table td { border: 1px solid var(--border); padding: 12px 14px; text-align: left; }
.article-body table th { background: var(--bg); font-weight: 700; }
.not-found { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 62px 40px; text-align: center; box-shadow: var(--shadow-sm); }
.not-found i { font-size: 58px; color: #cbd5e1; margin-bottom: 20px; display: inline-block; }
.not-found h2 { font-size: 28px; color: var(--dark); margin-bottom: 10px; }
.not-found p { color: var(--text-light); margin-bottom: 26px; }
.article-sidebar .sidebar-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 26px; margin-bottom: 24px; box-shadow: var(--shadow-sm); }
.article-sidebar .sidebar-card h3 { font-size: 17px; font-weight: 800; margin-bottom: 16px; display: flex; align-items: center; gap: 9px; color: var(--dark); }
.article-sidebar .sidebar-card h3 i { color: var(--primary); }
.sidebar-list { list-style: none; }
.sidebar-list li { border-bottom: 1px solid var(--border); }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a { display: flex; align-items: center; justify-content: space-between; padding: 13px 4px; text-decoration: none; color: var(--text); font-weight: 600; font-size: 14.5px; transition: var(--transition); }
.sidebar-list a:hover { color: var(--primary); transform: translateX(4px); }
.sidebar-list a i { font-size: 11px; color: #b0b8c4; transition: var(--transition); }
.sidebar-list a:hover i { color: var(--primary); transform: translateX(2px); }
.sidebar-cta p { font-size: 14px; color: var(--text-light); line-height: 1.75; margin-bottom: 18px; }
.sidebar-cta .btn { width: 100%; }
.sidebar-tip { background: linear-gradient(135deg, #fff5e6, #ffe9cc); border: 1px solid #ffd9a3; border-radius: var(--radius-lg); padding: 24px; margin-top: 4px; }
.sidebar-tip h3 { font-size: 16px; font-weight: 800; margin-bottom: 10px; color: #995200; display: flex; align-items: center; gap: 8px; }
.sidebar-tip p { font-size: 14px; color: #7a4a00; line-height: 1.75; }
.related-section { padding: 72px 0; background: var(--white); border-top: 1px solid var(--border); }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; gap: 16px; }
.section-head h2 { font-size: 28px; font-weight: 800; color: var(--dark); letter-spacing: -0.3px; }
.section-head.center { justify-content: center; text-align: center; }
.link-more { color: var(--primary); font-weight: 600; font-size: 14.5px; text-decoration: none; display: inline-flex; align-items: center; gap: 8px; transition: var(--transition); white-space: nowrap; }
.link-more:hover { gap: 12px; color: var(--primary-dark); }
.guide-card { display: block; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; text-decoration: none; box-shadow: var(--shadow-sm); transition: var(--transition); height: 100%; }
.guide-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: #c7d6ea; }
.card-img { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #e2e8f0; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .55s ease; }
.guide-card:hover .card-img img { transform: scale(1.06); }
.card-tag { position: absolute; top: 14px; left: 14px; background: rgba(42, 109, 244, 0.94); color: #fff; font-size: 12px; font-weight: 700; padding: 5px 13px; border-radius: 999px; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18); backdrop-filter: blur(4px); }
.card-content { padding: 24px 24px 26px; }
.card-content h3 { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 10px; line-height: 1.5; transition: var(--transition); }
.guide-card:hover .card-content h3 { color: var(--primary); }
.card-content p { font-size: 14px; color: var(--text-light); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-link { margin-top: 14px; display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 700; font-size: 14px; transition: var(--transition); }
.guide-card:hover .card-link { gap: 10px; }
.faq-section { padding: 72px 0; background: var(--bg); }
.faq-accordion { max-width: 820px; margin: 0 auto; }
.faq-accordion .accordion-item { border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 14px; background: var(--white); overflow: hidden; transition: var(--transition); list-style: none; }
.faq-accordion .accordion-item:hover { border-color: #c7d6ea; box-shadow: var(--shadow-sm); }
.faq-accordion .accordion-title { display: block; padding: 20px 54px 20px 24px; font-weight: 700; font-size: 16px; color: var(--dark); cursor: pointer; position: relative; text-decoration: none; background: none; border: none; line-height: 1.5; transition: background .25s ease; }
.faq-accordion .accordion-title:hover { background: #f9fbfd; }
.faq-accordion .accordion-title:hover, .faq-accordion .accordion-title:focus { color: var(--dark); }
.faq-accordion .accordion-title::before { content: none; }
.faq-accordion .accordion-title::after { content: "\f078"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; right: 22px; top: 50%; transform: translateY(-50%); color: var(--primary); transition: var(--transition); font-size: 14px; }
.faq-accordion .accordion-item.is-active .accordion-title::after { transform: translateY(-50%) rotate(180deg); }
.faq-accordion .accordion-item.is-active .accordion-title { background: var(--primary-light); }
.faq-accordion .accordion-content { background: none; border: none; padding: 4px 24px 22px; color: var(--text-light); font-size: 15px; line-height: 1.85; }
.faq-accordion .accordion-content p:last-child { margin-bottom: 0; }
.cta-section { padding: 80px 0; position: relative; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; background-attachment: fixed; }
.cta-section::before { content: ""; position: absolute; inset: 0; background: rgba(11, 27, 51, 0.72); }
.cta-inner { background: linear-gradient(135deg, rgba(11, 27, 51, 0.96), rgba(16, 41, 77, 0.92)); border-radius: 28px; padding: 62px 50px; position: relative; overflow: hidden; color: #fff; text-align: center; box-shadow: var(--shadow-lg); border: 1px solid rgba(255, 255, 255, 0.08); }
.cta-inner::before { content: ""; position: absolute; width: 340px; height: 340px; border-radius: 50%; background: radial-gradient(circle, rgba(42, 109, 244, 0.42), transparent 68%); top: -130px; right: -90px; }
.cta-inner::after { content: ""; position: absolute; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(0, 195, 137, 0.28), transparent 66%); bottom: -110px; left: -70px; }
.cta-inner h2 { font-size: 30px; font-weight: 800; margin-bottom: 14px; position: relative; z-index: 2; letter-spacing: -0.3px; }
.cta-inner p { font-size: 16px; color: rgba(255, 255, 255, 0.76); max-width: 640px; margin: 0 auto 30px; position: relative; z-index: 2; line-height: 1.8; }
.cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; z-index: 2; }
.site-footer { background: var(--dark); color: rgba(255, 255, 255, 0.75); padding: 62px 0 26px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.footer-brand .logo { color: #fff; margin-bottom: 14px; }
.footer-brand .logo i { color: var(--accent); }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.85; max-width: 360px; color: rgba(255, 255, 255, 0.55); }
.social-links { display: flex; gap: 12px; margin-top: 22px; }
.social-links a { width: 38px; height: 38px; border-radius: 50%; background: rgba(255, 255, 255, 0.08); display: flex; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.85); font-size: 15px; text-decoration: none; transition: var(--transition); }
.social-links a:hover { background: var(--primary); transform: translateY(-3px); color: #fff; }
.footer-col h4 { font-size: 16px; color: #fff; margin-bottom: 18px; font-weight: 700; }
.footer-col a { display: block; color: rgba(255, 255, 255, 0.6); text-decoration: none; font-size: 14px; padding: 5px 0; transition: var(--transition); }
.footer-col a:hover { color: #fff; transform: translateX(4px); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 24px; font-size: 13px; color: rgba(255, 255, 255, 0.4); }
.footer-bottom a { color: rgba(255, 255, 255, 0.5); text-decoration: none; }
.footer-bottom a:hover { color: #fff; }
@media (max-width: 1024px) {
  .header-inner { padding: 12px 20px; }
  .search-box { display: none; }
  .article-body { padding: 34px 32px; }
  .cta-section { background-attachment: scroll; }
}
@media (max-width: 768px) {
  .header-actions .btn { display: none; }
  .nav-toggle { display: flex; }
  .main-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(255, 255, 255, 0.98); flex-direction: column; padding: 14px 20px; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--border); gap: 10px; backdrop-filter: blur(14px); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 18px; border-radius: var(--radius-md); }
  .main-nav a.active { background: var(--primary); }
  .article-hero { padding: 56px 0; }
  .article-hero h1 { font-size: 28px; }
  .article-section { padding: 10px 0 56px; }
  .article-body { padding: 28px 22px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .cta-inner { padding: 44px 26px; }
  .cta-inner h2 { font-size: 24px; }
  .cta-buttons .btn { width: 100%; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .section-head.center { align-items: center; }
  .guide-card { margin-bottom: 0; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .header-inner { padding: 12px 16px; }
  .logo { font-size: 15.5px; }   .logo i { font-size: 21px; }
  .article-hero { padding: 46px 0; }
  .article-hero h1 { font-size: 24px; }
  .hero-meta { flex-direction: column; gap: 8px; }
  .breadcrumb span { max-width: 180px; }
  .article-body { padding: 22px 18px; }
  .article-body h2 { font-size: 22px; }
  .article-body p { font-size: 15px; }
  .cta-inner { padding: 38px 20px; }
  .cta-inner h2 { font-size: 21px; }
  .faq-accordion .accordion-title { font-size: 15px; padding: 18px 48px 18px 20px; }
  .faq-accordion .accordion-content { padding: 2px 20px 18px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 6px; }
}