/* roulang page: index */
:root {
    --primary: #0d9488;
    --primary-dark: #0b6b63;
    --primary-deep: #0f766e;
    --primary-light: #ccfbf1;
    --accent: #f59e0b;
    --warm: #f87171;
    --bg: #f8fafa;
    --card: #ffffff;
    --border: #e2edea;
    --title: #0f172a;
    --body: #334155;
    --muted: #64748b;
    --faint: #94a3b8;
    --deep: #0a2e2b;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow: 0 4px 12px rgba(15,118,110,0.06);
    --shadow-lg: 0 8px 24px rgba(15,118,110,0.12);
  }

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

  html { scroll-behavior: smooth; }

  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Inter", sans-serif;
    background: var(--bg);
    color: var(--body);
    line-height: 1.75;
    font-size: 16px;
  }

  img { max-width: 100%; display: block; }
  a { text-decoration: none; color: inherit; }
  button, input, textarea { font-family: inherit; }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,0.98);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 12px rgba(15,23,42,0.04);
    height: 64px;
  }
  .header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
  .logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .logo-icon {
    width: 38px; height: 38px; border-radius: 10px;
    background: linear-gradient(135deg, #0d9488, #0f766e);
    color: #fff; font-weight: 700; font-size: 17px;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 10px rgba(13,148,136,0.28);
  }
  .logo-text { display: flex; flex-direction: column; line-height: 1.1; }
  .logo-text strong { font-size: 19px; color: var(--title); font-weight: 700; letter-spacing: 0.3px; }
  .logo-text small { font-size: 12px; color: var(--muted); margin-top: 2px; font-weight: 400; }

  .main-nav { display: flex; align-items: center; gap: 28px; }
  .nav-link {
    position: relative;
    font-size: 15px;
    font-weight: 500;
    color: var(--body);
    padding: 6px 0;
    transition: color 0.2s;
  }
  .nav-link:hover { color: var(--primary); }
  .nav-link.active { color: var(--primary); font-weight: 600; }
  .nav-link.active::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: -2px;
    height: 2px; border-radius: 2px; background: var(--primary);
  }

  .header-right { display: flex; align-items: center; gap: 14px; }
  .search-box { position: relative; }
  .search-box input {
    width: 180px; height: 40px; border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    padding: 0 36px 0 14px;
    font-size: 14px;
    color: var(--title);
    transition: all 0.25s ease;
    outline: none;
  }
  .search-box input:focus { width: 220px; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(13,148,136,0.12); background: #fff; }
  .search-box svg { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; stroke: var(--muted); pointer-events: none; }

  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    height: 44px; padding: 0 22px;
    border-radius: 8px;
    font-size: 15px; font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    white-space: nowrap;
  }
  .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(13,148,136,0.24); }
  .btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(13,148,136,0.32); }
  .btn-primary:focus-visible { outline: 3px solid rgba(13,148,136,0.35); }
  .btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
  .btn-outline:hover { background: var(--primary-light); }
  .btn-accent { background: linear-gradient(135deg, #f59e0b, #f87171); color: #fff; box-shadow: 0 4px 14px rgba(245,158,11,0.3); }
  .btn-accent:hover { filter: brightness(1.05); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(245,158,11,0.4); }
  .btn-lg { height: 50px; padding: 0 28px; font-size: 16px; }
  .btn-sm { height: 36px; padding: 0 16px; font-size: 14px; }

  .menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }

  /* Hero */
  .hero {
    position: relative;
    min-height: 76vh;
    display: flex;
    align-items: center;
    background: #0a2e2b;
    overflow: hidden;
  }
  .hero-bg {
    position: absolute; inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.55;
  }
  .hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(100deg, rgba(10,46,43,0.96) 20%, rgba(10,46,43,0.72) 60%, rgba(10,46,43,0.3));
  }
  .hero-content { position: relative; z-index: 2; max-width: 640px; padding: 60px 0 70px; }
  .hero h1 {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.25;
    color: #fff;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
  }
  .hero h1 .highlight { color: #f59e0b; }
  .hero-sub {
    font-size: 17px;
    line-height: 1.75;
    color: #d7e5e2;
    margin-bottom: 34px;
    max-width: 540px;
  }
  .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
  .hero-status {
    position: absolute;
    right: 36px;
    bottom: 36px;
    z-index: 3;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 16px;
    padding: 16px 22px;
    color: #fff;
    box-shadow: 0 8px 30px rgba(0,0,0,0.25);
    min-width: 210px;
  }
  .hero-status .status-row { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 500; margin-bottom: 6px; }
  .hero-status .status-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: #34d399; box-shadow: 0 0 8px #34d399;
    animation: pulse-glow 1.6s infinite;
  }
  @keyframes pulse-glow { 0%,100% { opacity: 1; } 50% { opacity: 0.6; } }
  .hero-status .status-meta { display: flex; gap: 14px; font-size: 12px; color: #bfd3d0; }

  /* Sections */
  .section { padding: 80px 0; }
  .section-head { text-align: center; margin-bottom: 48px; }
  .section-head h2 { font-size: 32px; font-weight: 700; color: var(--title); line-height: 1.3; margin-bottom: 12px; }
  .section-head p { font-size: 15px; color: var(--muted); max-width: 620px; margin: 0 auto; }
  .section-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-deep);
    font-size: 13px;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 999px;
    margin-bottom: 12px;
  }

  /* Promo steps */
  .promo-wrap { display: flex; align-items: flex-end; gap: 24px; justify-content: center; flex-wrap: wrap; }
  .promo-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 30px 28px;
    flex: 1;
    max-width: 320px;
    min-width: 260px;
    position: relative;
    transition: all 0.3s;
    box-shadow: var(--shadow);
  }
  .promo-card:nth-child(1) { transform: translateY(16px); }
  .promo-card:nth-child(2) { transform: translateY(0); }
  .promo-card:nth-child(3) { transform: translateY(-16px); border-color: #f0b90b; box-shadow: 0 8px 30px rgba(245,158,11,0.18); }
  .promo-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
  .promo-card .promo-ico {
    width: 56px; height: 56px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; margin-bottom: 18px;
  }
  .promo-card:nth-child(1) .promo-ico { background: #e6f2f0; color: #0d9488; }
  .promo-card:nth-child(2) .promo-ico { background: #fef3e2; color: #f59e0b; }
  .promo-card:nth-child(3) .promo-ico { background: #fee2e2; color: #f87171; }
  .promo-card h3 { font-size: 20px; font-weight: 600; color: var(--title); margin-bottom: 10px; }
  .promo-card p { font-size: 14px; color: var(--muted); line-height: 1.7; margin-bottom: 18px; }
  .promo-corner {
    position: absolute; top: 14px; right: 14px;
    background: linear-gradient(135deg, #f59e0b, #f87171);
    color: #fff; font-size: 12px; font-weight: 600;
    padding: 3px 10px; border-radius: 999px;
  }

  /* News grid */
  .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .news-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px 22px 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all 0.25s;
    position: relative;
  }
  .news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: rgba(13,148,136,0.4); }
  .news-cat {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary-deep);
    font-size: 12px; font-weight: 600;
    padding: 3px 10px; border-radius: 999px;
    align-self: flex-start;
  }
  .news-card h3 { font-size: 17px; font-weight: 600; color: var(--title); line-height: 1.5; }
  .news-card p { font-size: 14px; color: var(--muted); line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .news-meta { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 8px; font-size: 13px; color: var(--faint); }
  .news-meta .read-more { color: var(--primary); font-weight: 500; }
  .news-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--muted);
    font-size: 15px;
    background: var(--card);
    border: 1px dashed var(--border);
    border-radius: 14px;
  }

  /* Compare */
  .compare-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
  .compare-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    position: relative;
    transition: all 0.25s;
  }
  .compare-card.recommend {
    border: 2px solid var(--primary);
    box-shadow: 0 8px 28px rgba(13,148,136,0.15);
    background: linear-gradient(180deg, #f5fffe, #fff);
  }
  .compare-card .compare-tag {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: var(--primary); color: #fff; font-size: 12px; font-weight: 600;
    padding: 4px 16px; border-radius: 999px; white-space: nowrap;
  }
  .compare-card h3 { font-size: 20px; font-weight: 700; color: var(--title); margin-bottom: 6px; }
  .compare-card .price { font-size: 30px; font-weight: 700; color: var(--title); margin-bottom: 18px; }
  .compare-card .price small { font-size: 14px; font-weight: 400; color: var(--muted); }
  .compare-list { list-style: none; margin-bottom: 22px; }
  .compare-list li { display: flex; align-items: flex-start; gap: 8px; font-size: 14px; color: var(--body); padding: 6px 0; }
  .compare-list li .ico-ok { color: #10b981; flex-shrink: 0; margin-top: 3px; }
  .compare-list li .ico-no { color: #cbd5e1; flex-shrink: 0; margin-top: 3px; }

  /* Timer section */
  .timer-section {
    background: #0a2e2b;
    position: relative;
    overflow: hidden;
  }
  .timer-section::before {
    content: '';
    position: absolute; top: -60%; left: -30%;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(13,148,136,0.35), transparent 70%);
  }
  .timer-section::after {
    content: '';
    position: absolute; bottom: -40%; right: -20%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(245,158,11,0.25), transparent 70%);
  }
  .timer-inner { position: relative; z-index: 2; text-align: center; padding: 36px 0; }
  .timer-inner h2 { color: #fff; font-size: 32px; font-weight: 700; margin-bottom: 12px; }
  .timer-inner > p { color: #cfe3e0; font-size: 15px; max-width: 560px; margin: 0 auto 32px; }
  .countdown { display: flex; justify-content: center; gap: 14px; margin-bottom: 34px; }
  .countdown .cd-item {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 14px;
    padding: 16px 22px;
    min-width: 88px;
    text-align: center;
  }
  .countdown .cd-num { font-size: 34px; font-weight: 700; color: #fff; line-height: 1.2; font-variant-numeric: tabular-nums; }
  .countdown .cd-label { font-size: 12px; color: #a0c0bc; margin-top: 4px; }

  /* Contact form */
  .contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
  .contact-info h3 { font-size: 22px; font-weight: 700; color: var(--title); margin-bottom: 16px; }
  .contact-info p { font-size: 15px; color: var(--muted); margin-bottom: 20px; line-height: 1.75; }
  .contact-list { list-style: none; margin-bottom: 24px; }
  .contact-list li { display: flex; align-items: center; gap: 12px; font-size: 15px; color: var(--body); padding: 8px 0; }
  .contact-list .ci-ico { width: 36px; height: 36px; border-radius: 10px; background: var(--primary-light); color: var(--primary-deep); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
  .form-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow);
  }
  .form-card h3 { font-size: 20px; font-weight: 700; color: var(--title); margin-bottom: 20px; }
  .form-group { margin-bottom: 18px; }
  .form-group label { display: block; font-size: 14px; color: var(--muted); margin-bottom: 6px; font-weight: 500; }
  .form-group label .req { color: var(--warm); }
  .form-group input, .form-group textarea {
    width: 100%;
    height: 48px;
    border: 1px solid #cbd5d1;
    border-radius: 8px;
    padding: 0 14px;
    font-size: 15px;
    color: var(--title);
    background: #fff;
    transition: all 0.2s;
    outline: none;
  }
  .form-group textarea { height: 110px; padding: 12px 14px; resize: vertical; }
  .form-group input:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(13,148,136,0.1); }
  .form-status { display: none; padding: 10px 14px; border-radius: 8px; font-size: 14px; margin-top: 12px; align-items: center; gap: 8px; }
  .form-status.success { background: #ecfdf5; color: #059669; border: 1px solid #a7f3d0; }
  .form-status.error { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }
  .form-status.visible { display: flex; }

  /* FAQ */
  .faq-list { max-width: 760px; margin: 0 auto; }
  .faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.25s;
  }
  .faq-item.active { border-color: var(--primary); box-shadow: 0 4px 14px rgba(13,148,136,0.08); }
  .faq-question {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 22px;
    cursor: pointer;
    font-size: 15px; font-weight: 500;
    color: var(--title);
    background: none; border: none; text-align: left; width: 100%;
    transition: color 0.2s;
  }
  .faq-question:hover { color: var(--primary); }
  .faq-question .faq-icon { flex-shrink: 0; transition: transform 0.25s; color: var(--muted); }
  .faq-item.active .faq-icon { transform: rotate(180deg); color: var(--primary); }
  .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
  .faq-item.active .faq-answer { max-height: 400px; }
  .faq-answer-inner { padding: 0 22px 20px; font-size: 14px; color: var(--muted); line-height: 1.75; }

  /* CTA */
  .cta-block {
    background: linear-gradient(135deg, #0d9488, #0b6b63);
    border-radius: 20px;
    padding: 48px 40px;
    text-align: center;
    color: #fff;
    position: relative;
    overflow: hidden;
  }
  .cta-block::after {
    content: ''; position: absolute; top: -50%; right: -30%;
    width: 300px; height: 300px; border-radius: 50%;
    background: rgba(255,255,255,0.08);
  }
  .cta-block h2 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
  .cta-block p { font-size: 15px; color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 28px; }
  .cta-block .btn { background: #f59e0b; color: #0a2e2b; }
  .cta-block .btn:hover { background: #fbbf24; }

  /* Footer */
  .site-footer { background: #0a2e2b; color: #b7ccc9; padding: 60px 0 24px; }
  .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
  .footer-brand .logo-text strong { color: #fff; }
  .footer-brand .logo-text small { color: #8db0ab; }
  .footer-brand p { font-size: 14px; line-height: 1.7; margin-top: 16px; max-width: 320px; }
  .footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
  .footer-col ul { list-style: none; }
  .footer-col ul li { font-size: 14px; padding: 5px 0; }
  .footer-col ul li a { transition: color 0.2s; }
  .footer-col ul li a:hover { color: #fff; }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 22px;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
  }

  /* Mobile nav */
  .mobile-drawer {
    display: none;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: #fff;
    z-index: 49;
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    box-shadow: 0 12px 24px rgba(0,0,0,0.06);
  }
  .mobile-drawer.open { display: block; }
  .mobile-drawer .nav-link { display: block; padding: 12px 0; font-size: 16px; border-bottom: 1px solid #f1f5f5; }
  .mobile-drawer .nav-link.active::after { display: none; }
  .mobile-drawer .mobile-actions { display: flex; gap: 12px; margin-top: 16px; }
  .mobile-drawer .mobile-actions .btn { flex: 1; }

  .hidden { display: none !important; }

  @media (max-width: 1024px) {
    .main-nav { display: none; }
    .header-right .search-box, .header-right .btn { display: none; }
    .menu-toggle { display: block; }
    .hero h1 { font-size: 36px; }
    .hero-status { right: 20px; bottom: 20px; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .compare-wrap { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
    .promo-wrap { flex-direction: column; align-items: center; }
    .promo-card { max-width: 100%; width: 100%; }
    .promo-card:nth-child(1), .promo-card:nth-child(2), .promo-card:nth-child(3) { transform: none; }
    .contact-wrap { grid-template-columns: 1fr; }
  }

  @media (max-width: 768px) {
    .section { padding: 56px 0; }
    .section-head h2 { font-size: 26px; }
    .hero { min-height: 70vh; }
    .hero h1 { font-size: 30px; }
    .hero-sub { font-size: 15px; }
    .hero-actions .btn { flex: 1; }
    .news-grid { grid-template-columns: 1fr; }
    .hero-status { position: static; margin: 32px 0 0; width: 100%; background: rgba(255,255,255,0.08); }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .countdown .cd-item { min-width: 70px; padding: 12px 14px; }
    .countdown .cd-num { font-size: 26px; }
    .cta-block { padding: 36px 24px; }
  }

  @media (max-width: 520px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 26px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .form-card { padding: 20px; }
    .logo-text strong { font-size: 17px; }
    .countdown { gap: 8px; }
    .countdown .cd-item { padding: 10px; min-width: 60px; }
    .countdown .cd-num { font-size: 22px; }
  }

/* roulang page: category1 */
:root {
    --primary: #0D9488;
    --primary-dark: #0F766E;
    --accent: #F59E0B;
    --danger: #F87171;
    --dark-bg: #0A2E2B;
    --page-bg: #F8FAFA;
    --card-bg: #FFFFFF;
    --border-light: #E2EDEA;
    --title-color: #0F172A;
    --body-color: #334155;
    --muted-color: #64748B;
    --disabled: #94A3B8;
    --radius: 14px;
    --shadow: 0 4px 12px rgba(15,118,110,0.06);
    --shadow-hover: 0 8px 24px rgba(15,118,110,0.12);
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "sans-serif";
    background: var(--page-bg);
    color: var(--body-color);
    line-height: 1.75;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
  input, button, textarea { font-family: inherit; }
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 2px 8px rgba(15,23,42,0.04);
    height: 64px;
  }
  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
  }
  .logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, #0D9488, #0F766E);
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 800; font-size: 16px; letter-spacing: 0.5px;
  }
  .logo-text { display: flex; flex-direction: column; line-height: 1.2; }
  .logo-text strong { font-size: 17px; font-weight: 800; color: var(--title-color); }
  .logo-text small { font-size: 11px; color: var(--muted-color); letter-spacing: 0.5px; }
  .main-nav { display: flex; align-items: center; gap: 28px; }
  .nav-link {
    position: relative;
    font-size: 15px; font-weight: 500;
    color: var(--body-color);
    padding: 6px 2px;
    transition: color 0.2s;
  }
  .nav-link:hover { color: var(--primary); }
  .nav-link.active { color: var(--primary); font-weight: 600; }
  .nav-link.active::after {
    content: "";
    position: absolute; left: 0; bottom: -2px;
    width: 100%; height: 2px;
    background: var(--primary); border-radius: 2px;
  }
  .header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .search-box {
    display: flex; align-items: center;
    background: #F1F5F5;
    border-radius: 8px;
    padding: 0 12px;
    width: 180px; height: 38px;
    transition: all 0.3s;
    border: 1px solid transparent;
  }
  .search-box:focus-within {
    width: 220px;
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(13,148,136,0.12);
  }
  .search-box input {
    border: none; outline: none; background: transparent;
    font-size: 13px; width: 100%; color: var(--body-color);
  }
  .search-box i { font-size: 14px; color: var(--muted-color); margin-right: 8px; flex-shrink: 0; }

  .btn-primary {
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--primary); color: #fff;
    border-radius: 8px; height: 48px; padding: 0 24px;
    font-size: 15px; font-weight: 600; border: none; cursor: pointer;
    transition: all 0.2s; white-space: nowrap;
  }
  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(13,148,136,0.25);
  }
  .btn-primary:focus { outline: none; box-shadow: 0 0 0 4px rgba(13,148,136,0.18); }
  .btn-outline-light {
    display: inline-flex; align-items: center; justify-content: center;
    background: transparent; color: #fff;
    border: 1px solid rgba(255,255,255,0.6);
    border-radius: 8px; height: 48px; padding: 0 24px;
    font-size: 15px; font-weight: 500; cursor: pointer;
    transition: all 0.2s;
  }
  .btn-outline-light:hover {
    background: rgba(255,255,255,0.12); border-color: #fff;
  }
  .btn-promo {
    display: inline-flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #F59E0B, #F87171);
    color: #fff; border: none; border-radius: 10px;
    height: 52px; padding: 0 36px;
    font-size: 16px; font-weight: 700; cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 20px rgba(245,158,11,0.35);
  }
  .btn-promo:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(245,158,11,0.5);
  }
  .mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; color: var(--title-color); font-size: 22px; }

  .breadcrumb { background: #fff; border-bottom: 1px solid var(--border-light); padding: 12px 0; }
  .breadcrumb-inner { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted-color); }
  .breadcrumb-inner a { color: var(--muted-color); }
  .breadcrumb-inner a:hover { color: var(--primary); }
  .breadcrumb-inner .sep { color: #CBD5D1; }
  .breadcrumb-inner .current { color: var(--primary); font-weight: 600; }

  .cat-hero {
    position: relative;
    background: linear-gradient(135deg, rgba(10,46,43,0.92) 0%, rgba(10,46,43,0.6) 50%, rgba(13,148,136,0.55) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    padding: 96px 0;
    color: #fff;
  }
  .cat-hero h1 {
    font-size: 42px; font-weight: 800; line-height: 1.2;
    color: #fff; margin-bottom: 16px;
  }
  .cat-hero h1 span { color: #FBBF24; }
  .cat-hero p {
    font-size: 17px; line-height: 1.8;
    max-width: 660px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 32px;
  }
  .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

  .section { padding: 80px 0; }
  .section-title {
    font-size: 30px; font-weight: 700; color: var(--title-color);
    text-align: center; line-height: 1.3; margin-bottom: 12px;
  }
  .section-sub {
    text-align: center; color: var(--muted-color);
    font-size: 16px; max-width: 720px;
    margin: 0 auto 48px;
  }

  .cat-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all 0.25s ease;
    box-shadow: var(--shadow);
  }
  .cat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(13,148,136,0.3);
  }
  .cat-card img { width: 100%; height: 180px; object-fit: cover; }
  .cat-card .card-body { padding: 24px 26px 26px; }
  .cat-card .card-tag {
    display: inline-flex;
    font-size: 12px;
    background: rgba(245,158,11,0.12);
    color: #D97706;
    padding: 3px 10px;
    border-radius: 999px;
    margin-bottom: 12px;
    font-weight: 500;
  }
  .cat-card h3 {
    font-size: 20px; font-weight: 600;
    color: var(--title-color); margin-bottom: 10px; line-height: 1.4;
  }
  .cat-card p {
    font-size: 14px; color: var(--body-color);
    line-height: 1.75; margin-bottom: 14px;
  }
  .cat-card .card-link {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--primary); font-size: 14px; font-weight: 600;
    transition: gap 0.2s;
  }
  .cat-card .card-link:hover { gap: 10px; color: var(--primary-dark); }

  .steps-section { background: var(--dark-bg); padding: 80px 0; color: #fff; }
  .steps-section .section-title { color: #fff; }
  .steps-section .section-sub { color: rgba(255,255,255,0.7); }
  .step-item {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 32px 28px;
    transition: all 0.25s;
  }
  .step-item:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
  }
  .step-icon {
    width: 44px; height: 44px;
    border-radius: 12px;
    background: rgba(251,191,36,0.15);
    display: flex; align-items: center; justify-content: center;
    color: #FBBF24; font-size: 20px; margin-bottom: 16px;
  }
  .step-item h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; color: #fff; }
  .step-item p { font-size: 14px; line-height: 1.75; color: rgba(255,255,255,0.75); }

  .tips-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .tip-item {
    background: #fff; border-radius: 14px; padding: 28px;
    border-top: 3px solid var(--primary);
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s;
  }
  .tip-item:hover { box-shadow: var(--shadow-hover); }
  .tip-item .tip-line { width: 36px; height: 3px; background: var(--accent); border-radius: 4px; margin-bottom: 16px; }
  .tip-item h3 { font-size: 18px; font-weight: 600; color: var(--title-color); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
  .tip-item h3 i { color: var(--primary); font-size: 18px; }
  .tip-item p { font-size: 14px; color: var(--body-color); line-height: 1.75; margin-bottom: 0; }

  .faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
  .faq-item { background: #fff; border: 1px solid var(--border-light); border-radius: 12px; overflow: hidden; transition: border-color 0.2s; }
  .faq-item.active { border-color: var(--primary); }
  .faq-question {
    padding: 20px 24px; cursor: pointer;
    font-size: 16px; font-weight: 600;
    color: var(--title-color);
    display: flex; justify-content: space-between; align-items: center; gap: 12px;
    user-select: none;
  }
  .faq-question:hover { color: var(--primary); }
  .faq-question i {
    width: 24px; height: 24px;
    border-radius: 50%;
    background: rgba(13,148,136,0.1);
    display: flex; align-items: center; justify-content: center;
    color: var(--primary); font-size: 13px; font-weight: 700;
    flex-shrink: 0; transition: transform 0.2s;
  }
  .faq-item.active .faq-question i { transform: rotate(45deg); }
  .faq-answer {
    max-height: 0; overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 24px;
    font-size: 14px; color: var(--body-color); line-height: 1.8;
    border-top: 1px solid transparent;
  }
  .faq-item.active .faq-answer {
    max-height: 600px;
    padding: 16px 24px 20px;
    border-top-color: var(--border-light);
  }

  .cta-section {
    background: linear-gradient(120deg, rgba(10,46,43,0.95), rgba(13,148,136,0.8)),
                url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
    padding: 72px 0;
    color: #fff;
    text-align: center;
  }
  .cta-section h2 { font-size: 30px; font-weight: 700; margin-bottom: 14px; }
  .cta-section p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 32px; }

  .site-footer { background: var(--dark-bg); padding: 56px 0 0; color: rgba(255,255,255,0.7); }
  .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; }
  .footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; max-width: 360px; }
  .footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 16px; }
  .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
  .footer-col ul a { color: rgba(255,255,255,0.65); font-size: 14px; transition: color 0.2s; }
  .footer-col ul a:hover { color: #FBBF24; }
  .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,0.45); }

  .mobile-drawer {
    display: none;
    position: fixed; top: 64px; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-light);
    padding: 16px 24px 24px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    z-index: 49;
  }
  .mobile-drawer.open { display: block; }
  .mobile-drawer a {
    display: block; padding: 12px 0;
    border-bottom: 1px solid #EFF5F3;
    font-size: 15px; font-weight: 500;
  }
  .mobile-drawer a:last-child { border-bottom: none; }
  .mobile-drawer a.active { color: var(--primary); font-weight: 600; }

  @media (max-width: 1024px) {
    .main-nav { gap: 18px; }
    .search-box { width: 150px; }
    .search-box:focus-within { width: 170px; }
  }
  @media (max-width: 768px) {
    .main-nav, .header-actions .search-box { display: none; }
    .mobile-toggle { display: inline-flex; }
    .section { padding: 56px 0; }
    .cat-hero { padding: 72px 0; }
    .cat-hero h1 { font-size: 32px; }
    .steps-section { padding: 56px 0; }
    .tips-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-brand p { max-width: none; }
  }
  @media (max-width: 520px) {
    .container { padding: 0 16px; }
    .logo-text small { display: none; }
    .header-actions .btn-primary { padding: 0 14px; font-size: 13px; height: 40px; }
    .cat-hero h1 { font-size: 28px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn-primary, .hero-actions .btn-outline-light { width: 100%; }
    .section-title { font-size: 24px; }
    .cat-card img { height: 150px; }
    .cta-section h2 { font-size: 24px; }
  }

/* roulang page: article */
:root {
  --primary: #0D9488;
  --primary-dark: #0F766E;
  --accent: #F59E0B;
  --accent-dark: #D97706;
  --danger: #F87171;
  --bg-body: #F8FAFA;
  --bg-card: #FFFFFF;
  --bg-green: #E6F2F0;
  --dark-bg: #0A2E2B;
  --dark-bg-light: #124B47;
  --title: #0F172A;
  --text: #334155;
  --muted: #64748B;
  --border: #E2EDEA;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 12px rgba(15, 118, 110, 0.06);
  --shadow-hover: 0 8px 24px rgba(15, 118, 110, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--bg-body);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

input,
textarea {
  font-family: inherit;
}

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

/* ===== Header ===== */
.main-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(15, 118, 110, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(13, 148, 136, 0.25);
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-text strong {
  font-size: 17px;
  font-weight: 700;
  color: var(--title);
}

.logo-text small {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.main-nav {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 6px 2px;
  position: relative;
  transition: color 0.2s;
  white-space: nowrap;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  background: #F1F5F5;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 12px;
  height: 38px;
  gap: 6px;
  transition: all 0.2s;
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  width: 160px;
  font-size: 14px;
  color: var(--text);
}

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

.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.12);
}

.search-icon {
  display: flex;
  color: var(--muted);
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  border: 1px solid transparent;
  line-height: 1;
  white-space: nowrap;
}

.btn-sm {
  height: 38px;
  padding: 0 18px;
  font-size: 14px;
  border-radius: 8px;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-accent:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.35);
  outline-offset: 2px;
}

.btn-secondary {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary);
}

.btn-secondary:hover {
  background: var(--bg-green);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
}

.btn-accent {
  background: linear-gradient(135deg, #F59E0B, #F87171);
  color: #fff;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.25);
}

.btn-accent:hover {
  filter: saturate(1.2) brightness(1.05);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
}

.btn-white {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.btn-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  padding: 8px;
  border-radius: 8px;
  transition: background 0.2s;
}

.hamburger:hover {
  background: var(--bg-green);
}

.hamburger span {
  width: 20px;
  height: 2px;
  background: var(--title);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  padding: 16px 24px;
  z-index: 49;
}

.mobile-menu.open {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu a {
  padding: 12px 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  transition: background 0.2s, color 0.2s;
}

.mobile-menu a:hover {
  background: var(--bg-green);
  color: var(--primary);
}

.mobile-menu a.active {
  color: var(--primary);
  background: var(--bg-green);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  padding: 48px 0 56px;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 46, 43, 0.88) 0%, rgba(10, 46, 43, 0.72) 60%, rgba(10, 46, 43, 0.45) 100%);
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
  transition: color 0.2s;
}

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

.breadcrumb span {
  color: rgba(255, 255, 255, 0.5);
}

.article-tag {
  display: inline-block;
  background: rgba(245, 158, 11, 0.16);
  color: #FCD34D;
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}

.article-hero h1 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  line-height: 1.25;
  max-width: 800px;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ===== Article Main ===== */
.article-main {
  padding: 56px 0 16px;
}

.container-narrow {
  max-width: 740px;
  margin: 0 auto;
}

.article-content {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow);
}

.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--title);
  margin: 32px 0 16px;
  line-height: 1.3;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.article-content h2:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

.article-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--title);
  margin: 28px 0 12px;
}

.article-content h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--title);
  margin: 24px 0 10px;
}

.article-content p {
  margin-bottom: 1.2em;
  color: var(--text);
}

.article-content a {
  color: var(--primary);
  border-bottom: 1px solid rgba(13, 148, 136, 0.3);
  transition: color 0.2s, border-color 0.2s;
}

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

.article-content ul,
.article-content ol {
  margin: 0 0 1.2em 1.5em;
}

.article-content ul li {
  list-style: disc;
  margin-bottom: 6px;
}

.article-content ol li {
  list-style: decimal;
  margin-bottom: 6px;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-green);
  padding: 16px 20px;
  border-radius: 0 10px 10px 0;
  margin: 1.5em 0;
  color: var(--title);
}

.article-content img {
  border-radius: 12px;
  margin: 1.5em 0;
  box-shadow: var(--shadow);
  width: 100%;
  height: auto;
  object-fit: cover;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 14px;
}

.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}

.article-content th {
  background: var(--bg-green);
  color: var(--title);
  font-weight: 600;
}

.article-content pre {
  background: #122F2C;
  color: #E6F2F0;
  padding: 16px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 1.2em 0;
  font-size: 14px;
  line-height: 1.6;
}

.article-content code {
  background: var(--bg-green);
  color: var(--primary-dark);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}

.article-empty {
  text-align: center;
  padding: 80px 20px;
}

.article-empty p {
  font-size: 22px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 24px;
}

/* ===== Related ===== */
.related-section {
  padding: 64px 0 72px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 8px;
  line-height: 1.3;
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 4px;
  background: var(--primary);
  border-radius: 4px;
}

.section-subtitle {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 32px;
}

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

.related-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.25s, box-shadow 0.25s;
  display: block;
}

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

.related-card:focus-visible {
  outline: 3px solid rgba(13, 148, 136, 0.35);
  outline-offset: 2px;
}

.card-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-green);
}

.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s;
}

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

.card-body {
  padding: 18px;
}

.card-tag {
  display: inline-block;
  background: var(--bg-green);
  color: var(--primary-dark);
  font-size: 12px;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
  font-weight: 500;
}

.related-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 10px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

/* ===== CTA ===== */
.cta-section {
  position: relative;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  padding: 64px 0;
  margin-top: 8px;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10, 46, 43, 0.95) 0%, rgba(10, 46, 43, 0.82) 50%, rgba(10, 46, 43, 0.65) 100%);
}

.cta-section .container {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.cta-content h2 {
  color: #fff;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.3;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  max-width: 520px;
}

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

/* ===== Footer ===== */
.site-footer {
  background: #0A2E2B;
  color: #CBD5D1;
  padding: 56px 0 20px;
}

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

.footer-brand p {
  color: #94A3B8;
  font-size: 14px;
  line-height: 1.7;
  margin-top: 14px;
  max-width: 340px;
}

.footer-brand .logo {
  display: inline-flex;
}

.footer-brand .logo-text strong {
  color: #fff;
}

.footer-brand .logo-text small {
  color: rgba(255, 255, 255, 0.6);
}

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

.footer-col ul {
  list-style: none;
}

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

.footer-col a {
  color: #94A3B8;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: #64748B;
}

.footer-bottom a {
  color: #64748B;
  transition: color 0.2s;
}

.footer-bottom a:hover {
  color: #94A3B8;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .header-actions .search-box {
    display: none;
  }

  .header-inner {
    justify-content: space-between;
  }

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

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

@media (max-width: 768px) {
  .article-hero {
    padding: 32px 0 40px;
  }

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

  .article-meta {
    gap: 10px;
    font-size: 13px;
    flex-direction: column;
    align-items: flex-start;
  }

  .article-main {
    padding: 40px 0 8px;
  }

  .article-content {
    padding: 28px 20px;
    border-radius: 12px;
  }

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

  .article-content h3 {
    font-size: 20px;
  }

  .related-section {
    padding: 48px 0 56px;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .cta-section {
    padding: 48px 0;
  }

  .cta-section .container {
    flex-direction: column;
    text-align: center;
  }

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

  .cta-actions .btn {
    width: 100%;
    max-width: 280px;
  }

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

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

  .header-actions .btn-sm {
    padding: 0 14px;
    font-size: 13px;
  }

  .logo-text strong {
    font-size: 16px;
  }

  .logo-text small {
    font-size: 11px;
  }

  .section-title {
    font-size: 24px;
  }

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

  .article-content {
    padding: 24px 16px;
  }
}

/* roulang page: category2 */
:root {
            --primary: #0D9488;
            --primary-dark: #0F766E;
            --primary-light: #E6F2F0;
            --accent: #F59E0B;
            --accent-light: #FEF3C7;
            --danger: #F87171;
            --bg: #F8FAFA;
            --card: #FFFFFF;
            --border: #E2EDEA;
            --title: #0F172A;
            --body: #334155;
            --muted: #64748B;
            --dark: #0A2E2B;
            --radius: 12px;
            --shadow: 0 4px 12px rgba(15, 118, 110, 0.06);
            --shadow-hover: 0 8px 24px rgba(15, 118, 110, 0.12);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background: var(--bg);
            color: var(--body);
            line-height: 1.75;
            font-size: 16px;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(15, 23, 42, .04);
            height: 64px;
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 28px;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 800;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: .5px;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .logo-text strong {
            font-size: 18px;
            font-weight: 700;
            color: var(--title);
            letter-spacing: .5px;
        }
        .logo-text small {
            font-size: 11px;
            color: var(--muted);
            letter-spacing: 1px;
        }
        .main-nav {
            display: flex;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }
        .nav-link {
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 15px;
            color: var(--body);
            position: relative;
            transition: all .2s;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: transparent;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            width: 180px;
            height: 40px;
            padding: 0 12px;
            background: #F1F5F5;
            border-radius: 8px;
            border: 1px solid transparent;
            transition: all .2s;
        }
        .search-box:focus-within {
            width: 220px;
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(13, 148, 136, .12);
        }
        .search-box input {
            flex: 1;
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: var(--title);
        }
        .search-box svg {
            width: 18px;
            height: 18px;
            color: var(--muted);
            flex-shrink: 0;
        }
        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: #F1F5F5;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border: none;
        }
        .mobile-toggle svg {
            width: 22px;
            height: 22px;
            color: var(--title);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, .08);
            z-index: 40;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 15px;
            color: var(--body);
        }
        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-menu a.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        /* ========== Button ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 24px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            border: 1px solid transparent;
            transition: all .2s;
        }
        .btn-sm {
            height: 40px;
            padding: 0 18px;
            font-size: 14px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: #0B6B63;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(13, 148, 136, .3);
        }
        .btn-primary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(13, 148, 136, .3);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .6);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .1);
            border-color: #fff;
        }
        .btn-accent {
            background: linear-gradient(135deg, #F59E0B, #F87171);
            color: #fff;
        }
        .btn-accent:hover {
            filter: brightness(1.05);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(245, 158, 11, .35);
        }
        .btn-secondary {
            background: var(--primary-light);
            color: var(--primary-dark);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            padding: 84px 0 76px;
            background: linear-gradient(135deg, rgba(10, 46, 43, .94), rgba(13, 148, 136, .82)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            color: #fff;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, .85);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, .5);
        }
        .hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 16px;
        }
        .hero h1 .highlight {
            color: #F59E0B;
        }
        .hero .lead {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .88);
            max-width: 640px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-metrics {
            display: flex;
            gap: 24px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-metric {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .14);
            border-radius: 12px;
            padding: 16px 22px;
            min-width: 130px;
        }
        .hero-metric strong {
            font-size: 28px;
            font-weight: 700;
            color: #F59E0B;
            display: block;
            line-height: 1.2;
        }
        .hero-metric span {
            font-size: 13px;
            color: rgba(255, 255, 255, .75);
        }

        /* ========== Section ========== */
        .section {
            padding: 80px 0;
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--title);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* ========== Timeline ========== */
        .timeline-list {
            position: relative;
            max-width: 860px;
            margin: 0 auto;
        }
        .timeline-list::before {
            content: '';
            position: absolute;
            left: 19px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 36px 58px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: 10px;
            top: 6px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--primary);
            box-shadow: 0 0 0 4px rgba(13, 148, 136, .15);
        }
        .timeline-item.feat .timeline-dot {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(245, 158, 11, .2);
        }
        .timeline-content {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 24px;
            box-shadow: var(--shadow);
            transition: all .25s;
        }
        .timeline-content:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .timeline-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .timeline-meta time {
            font-size: 13px;
            color: var(--muted);
        }
        .timeline-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 8px;
        }
        .timeline-content p {
            font-size: 14px;
            color: var(--body);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .timeline-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            border-top: 1px dashed var(--border);
            padding-top: 12px;
        }
        .timeline-footer span {
            font-size: 13px;
            color: var(--muted);
        }
        .link-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }
        .link-more:hover {
            color: var(--primary-dark);
        }

        /* ========== Steps ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            position: relative;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 32px 24px 24px;
            box-shadow: var(--shadow);
            text-align: left;
            transition: all .25s;
        }
        .step-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }
        .step-arrow {
            position: absolute;
            right: 16px;
            top: 26px;
            font-size: 20px;
            color: var(--primary);
        }

        /* ========== Promo Cards ========== */
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .promo-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all .25s;
        }
        .promo-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .promo-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .promo-body {
            padding: 20px;
        }
        .promo-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--title);
            margin: 10px 0 8px;
        }
        .promo-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.65;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 12px;
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .badge-warn {
            background: var(--accent-light);
            color: #B45309;
        }

        /* ========== Rules ========== */
        .rules-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .rules-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .rule-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 24px;
        }
        .rule-item h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .rule-item h3::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
        }
        .rule-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .2s;
        }
        .faq-item.open {
            border-color: var(--primary);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            background: #fff;
            border: none;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--title);
            text-align: left;
            transition: background .2s;
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: transform .3s;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 24px;
            transition: all .3s;
            font-size: 14px;
            color: var(--body);
            line-height: 1.75;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ========== CTA / Contact ========== */
        .cta-section {
            position: relative;
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(10, 46, 43, .95), rgba(13, 148, 136, .85)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 48px;
            align-items: center;
            text-align: left;
        }
        .cta-left h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .cta-left>p {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .85);
            max-width: 480px;
            margin-bottom: 16px;
        }
        .contact-lines {
            margin: 20px 0 28px;
        }
        .contact-lines p {
            font-size: 14px;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .contact-lines p::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #F59E0B;
            flex-shrink: 0;
        }
        .contact-form {
            background: #fff;
            border-radius: 16px;
            padding: 32px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, .15);
            border: 1px solid rgba(255, 255, 255, .3);
        }
        .contact-form h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--title);
            margin-bottom: 24px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            color: var(--muted);
            margin-bottom: 8px;
        }
        .form-group label span {
            color: var(--danger);
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            height: 48px;
            padding: 0 14px;
            border: 1px solid #CBD5D1;
            border-radius: 8px;
            font-size: 14px;
            color: var(--title);
            background: #fff;
            transition: all .2s;
            outline: none;
        }
        .form-group textarea {
            height: auto;
            padding: 12px 14px;
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(13, 148, 136, .15);
        }
        .form-tip {
            font-size: 14px;
            margin-top: 12px;
            text-align: center;
            color: var(--primary);
            min-height: 20px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .75);
            padding: 60px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text strong {
            color: #fff;
        }
        .footer-brand .logo-text small {
            color: rgba(255, 255, 255, .55);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, .6);
            margin-top: 14px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, .65);
            transition: color .2s;
        }
        .footer-col ul a:hover {
            color: #F59E0B;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .45);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-actions .search-box {
                display: none;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .promo-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .rules-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 56px 0;
            }
            .hero {
                padding: 60px 0 56px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero .lead {
                font-size: 15px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .promo-grid {
                grid-template-columns: 1fr;
            }
            .rules-grid {
                grid-template-columns: 1fr;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .timeline-item {
                padding-left: 48px;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .contact-form {
                padding: 24px;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                gap: 12px;
            }
            .header-actions .btn {
                display: none;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-metrics {
                gap: 12px;
            }
            .hero-metric {
                flex: 1;
                min-width: 100px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-left h2 {
                font-size: 24px;
            }
        }

/* roulang page: category3 */
:root {
    --primary: #0D9488;
    --primary-dark: #0F766E;
    --primary-deeper: #115E59;
    --accent: #F59E0B;
    --accent-light: #FBBF24;
    --danger: #F87171;
    --bg-page: #F8FAFA;
    --bg-card: #FFFFFF;
    --bg-soft: #E6F2F0;
    --text-title: #0F172A;
    --text-body: #334155;
    --text-muted: #64748B;
    --text-disable: #94A3B8;
    --border-color: #E2EDEA;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-card: 0 4px 12px rgba(15,118,110,0.06);
    --shadow-hover: 0 8px 24px rgba(15,118,110,0.12);
    --bg-dark: #0A2E2B;
    --bg-dark-deep: #062A28;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', 'Inter', system-ui, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-body);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

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

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

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

  .container {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
  }

  .site-header {
    backdrop-filter: blur(8px);
    background: rgba(255,255,255,0.96);
  }

  .nav-link {
    position: relative;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-body);
    border-radius: 8px;
    transition: color 0.2s ease, background-color 0.2s ease;
  }

  .nav-link:hover {
    color: var(--primary);
    background: rgba(13, 148, 136, 0.06);
  }

  .nav-link.active {
    color: var(--primary);
    font-weight: 600;
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 14px;
    right: 14px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 26px;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(13,148,136,0.22);
    transition: all 0.2s ease;
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(13,148,136,0.28);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(13,148,136,0.2);
  }

  .btn-outline-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 26px;
    background: transparent;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    border: 1.5px solid rgba(255,255,255,0.5);
    border-radius: 10px;
    transition: all 0.2s ease;
  }

  .btn-outline-light:hover {
    background: rgba(255,255,255,0.12);
    border-color: rgba(255,255,255,0.8);
    transform: translateY(-2px);
  }

  .btn-accent {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 26px;
    background: linear-gradient(135deg, var(--accent-light), var(--accent));
    color: #1a1a1a;
    font-size: 15px;
    font-weight: 700;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(245,158,11,0.3);
    transition: all 0.2s ease;
  }

  .btn-accent:hover {
    box-shadow: 0 8px 22px rgba(245,158,11,0.4);
    transform: translateY(-2px);
    filter: brightness(1.05);
  }

  .section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-title);
    line-height: 1.3;
    letter-spacing: -0.01em;
  }

  .section-subtitle {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  .card-base {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
  }

  .card-base:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(13,148,136,0.3);
  }

  .tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
    background: rgba(13,148,136,0.08);
    color: var(--primary);
  }

  .section-padding {
    padding-top: 80px;
    padding-bottom: 80px;
  }

  .help-list-item {
    transition: all 0.25s ease;
  }

  .help-list-item:hover {
    border-color: rgba(13,148,136,0.4);
    box-shadow: var(--shadow-hover);
    transform: translateX(4px);
  }

  .faq-item {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
  }

  .faq-item.open {
    border-color: rgba(13,148,136,0.45);
    box-shadow: var(--shadow-card);
  }

  .faq-question {
    cursor: pointer;
    transition: color 0.2s ease;
  }

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

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.3s ease;
  }

  .site-footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.72);
  }

  .site-footer a {
    transition: color 0.2s ease;
  }

  .site-footer a:hover {
    color: #fff;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
  }

  @media (max-width: 1023px) {
    .nav-link.active::after {
      display: none;
    }
    .section-padding {
      padding-top: 64px;
      padding-bottom: 64px;
    }
  }

  @media (max-width: 640px) {
    .section-title {
      font-size: 24px;
    }
    .section-padding {
      padding-top: 48px;
      padding-bottom: 48px;
    }
    .btn-primary,
    .btn-accent,
    .btn-outline-light {
      width: 100%;
    }
  }