/* roulang page: index */
:root {
    --primary: #0c1b3a;
    --primary-light: #1a2d52;
    --primary-dark: #071129;
    --accent: #d4a95a;
    --accent-hover: #b8913f;
    --bg-light: #f7f8fa;
    --text-main: #1a2333;
    --text-muted: #64748b;
    --border: #e5e9f0;
    --radius: 14px;
    --radius-lg: 20px;
    --shadow-sm: 0 2px 12px rgba(12, 27, 58, 0.06);
    --shadow-md: 0 8px 32px rgba(12, 27, 58, 0.10);
    --shadow-lg: 0 16px 48px rgba(12, 27, 58, 0.14);
  }

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

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

  body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-main);
    background: #fff;
  }

  a { color: inherit; text-decoration: none; transition: color .25s ease; }
  img { display: block; max-width: 100%; height: auto; }
  button { cursor: pointer; font-family: inherit; }
  input, button { outline: none; }

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

  .section { padding: 88px 0; }
  .section-head { margin-bottom: 56px; }
  .section-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 14px; font-weight: 600; letter-spacing: .16em; text-transform: uppercase;
    color: var(--accent); margin-bottom: 12px;
  }
  .section-eyebrow::before {
    content: ""; width: 28px; height: 2px; background: var(--accent); border-radius: 2px;
  }
  .section-title {
    font-size: clamp(28px, 4.4vw, 40px);
    font-weight: 800; line-height: 1.25; letter-spacing: -0.02em;
    color: var(--text-main); margin: 0 0 12px;
  }
  .section-desc { font-size: 17px; color: var(--text-muted); max-width: 640px; line-height: 1.8; }

  /* ===== Header ===== */
  .site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
  }
  .site-header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }
  .logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 20px; font-weight: 800; letter-spacing: -0.02em; color: var(--primary);
  }
  .logo-dot {
    width: 10px; height: 10px; border-radius: 50%; flex: 0 0 auto;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(212,169,90,.18);
  }
  .nav-links { display: flex; align-items: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
  .nav-links a {
    display: inline-block; padding: 10px 16px; border-radius: 999px;
    font-size: 15px; font-weight: 500; color: #4a5468;
    transition: color .2s ease, background .2s ease;
  }
  .nav-links a:hover { color: var(--primary); background: rgba(12,27,58,.05); }
  .nav-links a.active { color: var(--primary); background: rgba(12,27,58,.08); font-weight: 600; position: relative; }
  .nav-links a.active::after {
    content: ""; position: absolute; left: 50%; bottom: 4px; transform: translateX(-50%);
    width: 10px; height: 2px; border-radius: 2px; background: var(--accent);
  }
  .btn-primary {
    display: inline-block; padding: 10px 28px; border-radius: 999px;
    background: var(--primary); color: #fff; font-weight: 600; font-size: 15px;
    border: none; transition: all .25s ease;
    box-shadow: 0 4px 16px rgba(12,27,58,.2);
  }
  .btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(12,27,58,.26); }
  .btn-primary:focus-visible { outline: 3px solid rgba(212,169,90,.5); outline-offset: 2px; }
  .btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(12,27,58,.18); }
  .btn-gold {
    display: inline-block; padding: 12px 32px; border-radius: 999px;
    background: var(--accent); color: #0a1a2f; font-weight: 700; font-size: 15px;
    border: none; transition: all .25s ease;
    box-shadow: 0 4px 20px rgba(212,169,90,.32);
  }
  .btn-gold:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(212,169,90,.4); }
  .btn-gold:focus-visible { outline: 3px solid rgba(212,169,90,.5); outline-offset: 2px; }
  .btn-outline {
    display: inline-block; padding: 11px 30px; border-radius: 999px;
    background: transparent; color: #fff; font-weight: 600; font-size: 15px;
    border: 1.5px solid rgba(255,255,255,.55); transition: all .25s ease;
  }
  .btn-outline:hover { background: rgba(255,255,255,.14); border-color: #fff; transform: translateY(-2px); }
  .mobile-menu-btn { padding: 8px; border: none; background: transparent; color: var(--primary); }

  /* ===== Hero ===== */
  .hero {
    position: relative; min-height: 620px; display: flex; align-items: center;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover; background-position: center;
  }
  .hero::before {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(100deg, rgba(7,17,41,.88) 0%, rgba(12,27,58,.72) 45%, rgba(12,27,58,.35) 100%);
  }
  .hero-inner { position: relative; z-index: 2; padding: 100px 0; }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(212,169,90,.14); border: 1px solid rgba(212,169,90,.3);
    color: #e8c98a; font-size: 13px; font-weight: 600; letter-spacing: .12em;
    padding: 8px 20px; border-radius: 999px; margin-bottom: 24px;
    backdrop-filter: blur(6px);
  }
  .hero-title {
    font-size: clamp(36px, 6vw, 64px); font-weight: 900; line-height: 1.12;
    color: #fff; letter-spacing: -0.03em; margin: 0 0 20px; max-width: 640px;
  }
  .hero-sub { font-size: 18px; color: rgba(255,255,255,.78); max-width: 560px; line-height: 1.85; margin-bottom: 36px; }
  .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
  .hero-meta { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 48px; }
  .hero-meta-item {
    display: flex; align-items: center; gap: 10px;
    background: rgba(255,255,255,.08); border-radius: 999px; padding: 8px 18px;
    color: rgba(255,255,255,.86); font-size: 14px;
    border: 1px solid rgba(255,255,255,.10);
  }
  .hero-meta-item .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

  /* ===== Feature Cards ===== */
  .features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
  .feature-card {
    background: #fff; border-radius: var(--radius); padding: 32px 28px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
    transition: all .3s ease; position: relative; overflow: hidden;
  }
  .feature-card::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent); opacity: 0; transition: opacity .3s ease;
  }
  .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(12,27,58,.1); }
  .feature-card:hover::before { opacity: 1; }
  .feature-icon {
    width: 56px; height: 56px; border-radius: 16px; display: flex; align-items: center; justify-content: center;
    background: rgba(12,27,58,.06); color: var(--primary); font-size: 24px; margin-bottom: 20px;
    transition: all .3s ease;
  }
  .feature-card:hover .feature-icon { background: var(--primary); color: #fff; }
  .feature-title { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text-main); }
  .feature-desc { font-size: 14.5px; color: var(--text-muted); line-height: 1.75; margin: 0; }

  /* ===== Category Cards ===== */
  .cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .cat-card {
    border-radius: var(--radius-lg); overflow: hidden; background: #fff;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
    transition: all .3s ease; display: flex; flex-direction: column;
  }
  .cat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
  .cat-card-img { position: relative; aspect-ratio: 4/3; 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 40%, rgba(7,17,41,.5));
  }
  .cat-tag {
    position: absolute; top: 14px; left: 14px; z-index: 2;
    background: rgba(255,255,255,.92); color: var(--primary); font-size: 12px; font-weight: 600;
    padding: 5px 14px; border-radius: 999px; backdrop-filter: blur(4px);
  }
  .cat-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
  .cat-btn {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 14px; font-weight: 600; color: var(--primary); margin-top: auto;
  }
  .cat-btn i { transition: transform .25s ease; }
  .cat-card:hover .cat-btn i { transform: translateX(4px); }

  /* ===== Latest List ===== */
  .latest-wrap { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; align-items: start; }
  .latest-card {
    display: flex; gap: 20px; padding: 24px 0; border-bottom: 1px solid var(--border);
    transition: all .25s ease;
  }
  .latest-card:hover { padding-left: 8px; }
  .latest-card:last-child { border-bottom: none; }
  .latest-meta { flex: 0 0 auto; display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
  .badge {
    display: inline-block; padding: 4px 12px; border-radius: 999px;
    font-size: 12px; font-weight: 600; color: var(--primary);
    background: rgba(12,27,58,.08);
  }
  .badge-gold { background: rgba(212,169,90,.14); color: #8a6a2b; }
  .latest-content h3 { font-size: 18px; font-weight: 700; margin-bottom: 6px; color: var(--text-main); transition: color .2s ease; }
  .latest-card:hover h3 { color: var(--primary); }
  .latest-content p { font-size: 14px; color: var(--text-muted); margin: 0; line-height: 1.7; }
  .latest-time { font-size: 13px; color: #9aa3b2; }

  .side-panel { background: var(--bg-light); border-radius: var(--radius-lg); padding: 36px 32px; }
  .side-panel h3 { font-size: 20px; font-weight: 800; margin-bottom: 20px; }
  .side-item { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid rgba(12,27,58,.06); }
  .side-item:last-child { border-bottom: none; }
  .side-num {
    width: 28px; height: 28px; flex: 0 0 auto; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    background: var(--primary); color: #fff; font-size: 13px; font-weight: 700;
  }
  .side-item:nth-child(n+4) .side-num { background: rgba(12,27,58,.12); color: var(--primary); }
  .side-item span { font-size: 14.5px; color: var(--text-main); font-weight: 500; }

  /* ===== Process ===== */
  .process-section { background: var(--primary); color: #fff; position: relative; overflow: hidden; }
  .process-section::before {
    content: ""; position: absolute; top: -120px; right: -120px; width: 360px; height: 360px;
    border-radius: 50%; background: rgba(212,169,90,.08); pointer-events: none;
  }
  .process-section::after {
    content: ""; position: absolute; bottom: -160px; left: -100px; width: 400px; height: 400px;
    border-radius: 50%; background: rgba(255,255,255,.03); pointer-events: none;
  }
  .process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; z-index: 1; }
  .process-step { padding: 32px 24px; border-radius: var(--radius); background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.08); }
  .step-num { font-size: 42px; font-weight: 900; color: rgba(212,169,90,.7); line-height: 1; margin-bottom: 16px; }
  .step-title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
  .step-desc { font-size: 14px; color: rgba(255,255,255,.7); line-height: 1.7; margin: 0; }

  /* ===== FAQ ===== */
  .faq-wrap { max-width: 820px; margin: 0 auto; }
  .faq-item {
    border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 14px;
    background: #fff; overflow: hidden; transition: all .25s ease;
  }
  .faq-item:hover { border-color: rgba(12,27,58,.16); box-shadow: var(--shadow-sm); }
  .faq-q {
    display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 22px 28px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--text-main);
    background: none; border: none; width: 100%; text-align: left;
  }
  .faq-q .faq-icon {
    width: 26px; height: 26px; flex: 0 0 auto; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: rgba(12,27,58,.06); color: var(--primary); font-size: 14px;
    transition: all .25s ease;
  }
  .faq-item.open .faq-icon { background: var(--accent); color: #fff; transform: rotate(45deg); }
  .faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
  .faq-a-inner { padding: 0 28px 24px; font-size: 15px; color: var(--text-muted); line-height: 1.8; }

  /* ===== CTA ===== */
  .cta-section { position: relative; border-radius: var(--radius-lg); overflow: hidden; padding: 80px 56px; text-align: center; color: #fff; }
  .cta-section::before {
    content: ""; position: absolute; inset: 0;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  }
  .cta-section::after {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(7,17,41,.9), rgba(12,27,58,.78));
  }
  .cta-content { position: relative; z-index: 2; max-width: 640px; margin: 0 auto; }
  .cta-title { font-size: 32px; font-weight: 800; line-height: 1.3; margin-bottom: 12px; }
  .cta-desc { font-size: 16px; color: rgba(255,255,255,.8); margin-bottom: 32px; }

  /* ===== Footer ===== */
  .site-footer { background: #0a1326; color: rgba(255,255,255,.75); padding: 64px 0 28px; }
  .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
  .footer-logo { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 12px; }
  .footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.55); max-width: 360px; }
  .footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
  .footer-col ul { list-style: none; padding: 0; margin: 0; }
  .footer-col ul li { margin-bottom: 10px; }
  .footer-col ul a { font-size: 14px; color: rgba(255,255,255,.65); transition: color .2s ease; }
  .footer-col ul a:hover { color: var(--accent); }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1); padding-top: 24px;
    display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between;
    font-size: 13px; color: rgba(255,255,255,.45);
  }

  /* ===== Mobile Menu ===== */
  .mobile-menu {
    display: none; position: fixed; top: 76px; left: 0; right: 0; bottom: 0; z-index: 99;
    background: rgba(255,255,255,.98); backdrop-filter: blur(20px);
    padding: 24px; border-top: 1px solid var(--border);
  }
  .mobile-menu.open { display: block; }
  .mobile-menu a {
    display: block; padding: 16px 12px; font-size: 17px; font-weight: 600;
    color: var(--text-main); border-bottom: 1px solid var(--border);
  }
  .mobile-menu a:last-child { border-bottom: none; }
  .mobile-menu a.active { color: var(--primary); }
  .mobile-menu .btn-primary { margin-top: 24px; width: 100%; text-align: center; }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .cat-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .section { padding: 64px 0; }
  }
  @media (max-width: 768px) {
    .nav-links { display: none; }
    .hero { min-height: 540px; }
    .hero-inner { padding: 72px 0; }
    .latest-wrap { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .cta-section { padding: 56px 24px; }
    .site-header .btn-primary { display: none; }
  }
  @media (max-width: 520px) {
    .container { padding: 0 16px; }
    .features-grid { grid-template-columns: 1fr; }
    .cat-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 34px; }
    .section { padding: 48px 0; }
    .hero-meta { flex-direction: column; }
  }

/* roulang page: category1 */
:root {
      --primary: #1d4ed8;
      --primary-dark: #1e40af;
      --accent: #f59e0b;
      --accent-light: #fbbf24;
      --bg: #f8fafc;
      --text: #1e293b;
      --text-weak: #64748b;
      --border: #e2e8f0;
      --radius: 14px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 6px 24px rgba(0,0,0,0.07);
      --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
      --space-section: clamp(60px, 8vw, 110px);
    }
    * { 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;
      -webkit-font-smoothing: antialiased;
    }
    a { text-decoration: none; color: inherit; transition: color 0.2s ease; }
    img { max-width: 100%; display: block; }
    button { cursor: pointer; font-family: inherit; }
    ul { list-style: none; }

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

    /* ===== Header / Nav ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
      gap: 24px;
    }
    .brand {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
      white-space: nowrap;
    }
    .brand:hover { color: var(--primary-dark); }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
    }
    .nav-links a {
      display: inline-block;
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-weak);
      transition: color 0.2s, background 0.2s;
    }
    .nav-links a:hover {
      color: var(--primary);
      background: rgba(29, 78, 216, 0.05);
    }
    .nav-links a.active {
      color: var(--primary);
      font-weight: 600;
      background: rgba(29, 78, 216, 0.08);
    }
    .nav-links a.active::after {
      content: '';
      display: block;
      width: 20px;
      height: 3px;
      border-radius: 2px;
      background: var(--accent);
      margin: 4px auto 0;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border);
      border-radius: 8px;
      width: 42px;
      height: 42px;
      font-size: 1.1rem;
      color: var(--text);
      align-items: center;
      justify-content: center;
      transition: background 0.2s;
    }
    .menu-toggle:hover { background: #f1f5f9; }

    /* ===== Hero ===== */
    .category-hero {
      position: relative;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      padding: clamp(60px, 10vw, 120px) 0;
      color: #fff;
      overflow: hidden;
    }
    .category-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 40%, rgba(29, 78, 216, 0.65) 100%);
    }
    .category-hero .container { position: relative; z-index: 2; }
    .hero-breadcrumb {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.75);
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.18);
      padding: 6px 16px;
      border-radius: 100px;
      margin-bottom: 24px;
      backdrop-filter: blur(4px);
    }
    .hero-breadcrumb a:hover { color: var(--accent-light); }
    .category-hero h1 {
      font-size: clamp(1.9rem, 4.5vw, 3rem);
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 18px;
    }
    .category-hero .hero-sub {
      font-size: 1.1rem;
      color: rgba(255, 255, 255, 0.88);
      max-width: 640px;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 10px;
      font-weight: 600;
      font-size: 0.95rem;
      border: none;
      transition: all 0.25s ease;
    }
    .btn-primary {
      background: var(--accent);
      color: #1e293b;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
    }
    .btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245, 158, 11, 0.4); }
    .btn-outline {
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.35);
      backdrop-filter: blur(4px);
    }
    .btn-outline:hover { background: rgba(255, 255, 255, 0.2); transform: translateY(-2px); }

    /* ===== Section ===== */
    .section { padding: var(--space-section) 0; }
    .section-alt { background: #fff; }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 52px;
    }
    .section-tag {
      display: inline-block;
      background: rgba(29, 78, 216, 0.08);
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 5px 16px;
      border-radius: 100px;
      letter-spacing: 0.06em;
      margin-bottom: 14px;
    }
    .section-head h2 {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
      color: var(--text);
    }
    .section-head p {
      color: var(--text-weak);
      font-size: 1rem;
      line-height: 1.8;
    }

    /* ===== Auth Method Cards ===== */
    .method-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .method-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 36px 26px 32px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .method-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      opacity: 0;
      transition: opacity 0.3s;
    }
    .method-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(29, 78, 216, 0.25);
    }
    .method-card:hover::before { opacity: 1; }
    .method-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }
    .method-icon.blue { background: rgba(29, 78, 216, 0.1); color: var(--primary); }
    .method-icon.orange { background: rgba(245, 158, 11, 0.12); color: #b45309; }
    .method-icon.green { background: rgba(16, 185, 129, 0.12); color: #047857; }
    .method-icon.purple { background: rgba(139, 92, 246, 0.12); color: #7c3aed; }
    .method-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .method-card p {
      font-size: 0.9rem;
      color: var(--text-weak);
      line-height: 1.75;
    }
    .method-tag {
      display: inline-block;
      margin-top: 14px;
      background: #f8fafc;
      border: 1px solid var(--border);
      border-radius: 100px;
      font-size: 0.75rem;
      color: var(--text-weak);
      padding: 3px 12px;
    }

    /* ===== Steps ===== */
    .steps-section {
      background-image: url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
      position: relative;
    }
    .steps-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(15, 23, 42, 0.9);
    }
    .steps-section .container { position: relative; z-index: 2; }
    .steps-section .section-head h2 { color: #fff; }
    .steps-section .section-head p { color: rgba(255, 255, 255, 0.75); }
    .steps-section .section-tag { background: rgba(255, 255, 255, 0.12); color: var(--accent-light); }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      position: relative;
    }
    .steps-grid::before {
      content: '';
      position: absolute;
      top: 36px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: linear-gradient(90deg, rgba(255,255,255,0.15), rgba(255,255,255,0.5), rgba(255,255,255,0.15));
      z-index: 0;
    }
    .step-item {
      text-align: center;
      position: relative;
      z-index: 1;
    }
    .step-num {
      width: 72px;
      height: 72px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-size: 1.4rem;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      border: 4px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 8px 30px rgba(29, 78, 216, 0.4);
    }
    .step-item h3 {
      color: #fff;
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .step-item p {
      color: rgba(255, 255, 255, 0.7);
      font-size: 0.88rem;
      line-height: 1.7;
    }

    /* ===== Security Block ===== */
    .security-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .security-image {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .security-image img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .security-image .img-badge {
      position: absolute;
      bottom: 18px;
      left: 18px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(6px);
      border-radius: 12px;
      padding: 10px 20px;
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text);
      box-shadow: var(--shadow-md);
    }
    .security-points {
      display: flex;
      flex-direction: column;
      gap: 26px;
    }
    .security-point {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .security-point .sp-icon {
      flex-shrink: 0;
      width: 46px;
      height: 46px;
      border-radius: 12px;
      background: rgba(29, 78, 216, 0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
    }
    .security-point h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .security-point p {
      font-size: 0.9rem;
      color: var(--text-weak);
      line-height: 1.7;
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 14px;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s;
    }
    .faq-item:hover { border-color: rgba(29, 78, 216, 0.2); box-shadow: var(--shadow-md); }
    .faq-item summary {
      padding: 20px 26px;
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      color: var(--text);
      transition: color 0.2s;
    }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      font-size: 0.8rem;
      color: var(--text-weak);
      transition: transform 0.3s;
      flex-shrink: 0;
    }
    .faq-item[open] summary::after { transform: rotate(180deg); }
    .faq-item[open] summary { color: var(--primary); }
    .faq-answer {
      padding: 0 26px 20px;
      color: var(--text-weak);
      font-size: 0.92rem;
      line-height: 1.8;
      border-top: 1px dashed var(--border);
      padding-top: 16px;
    }

    /* ===== CTA ===== */
    .cta-section {
      background-image: url('/assets/images/backpic/back-3.png');
      background-size: cover;
      background-position: center;
      position: relative;
      padding: clamp(50px, 7vw, 90px) 0;
    }
    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(29, 78, 216, 0.82), rgba(15, 23, 42, 0.92));
    }
    .cta-section .container { position: relative; z-index: 2; text-align: center; }
    .cta-section h2 {
      color: #fff;
      font-size: clamp(1.6rem, 3.5vw, 2.3rem);
      font-weight: 800;
      margin-bottom: 14px;
    }
    .cta-section p {
      color: rgba(255, 255, 255, 0.82);
      max-width: 560px;
      margin: 0 auto 30px;
      font-size: 1rem;
    }
    .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

    /* ===== Footer ===== */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      margin-bottom: 44px;
    }
    .footer-logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
    }
    .footer-desc {
      font-size: 0.9rem;
      line-height: 1.8;
      color: #64748b;
      max-width: 360px;
    }
    .footer-col h4 {
      color: #e2e8f0;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul a {
      color: #94a3b8;
      font-size: 0.9rem;
      transition: color 0.2s;
    }
    .footer-col ul a:hover { color: #f1f5f9; }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 0.82rem;
      color: #475569;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .method-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
      .steps-grid::before { display: none; }
      .security-grid { grid-template-columns: 1fr; gap: 40px; }
    }
    @media (max-width: 768px) {
      .header-inner { height: 64px; }
      .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 12px 20px 20px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        display: none;
        gap: 4px;
      }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 12px 16px; font-size: 1rem; }
      .nav-links a.active { background: rgba(29, 78, 216, 0.06); }
      .nav-links a.active::after { display: none; }
      .menu-toggle { display: flex; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .category-hero { padding: 60px 0 80px; }
      .hero-actions .btn { width: 100%; justify-content: center; }
    }
    @media (max-width: 520px) {
      .method-grid { grid-template-columns: 1fr; }
      .steps-grid { grid-template-columns: 1fr; }
      .step-item { max-width: 320px; margin: 0 auto; }
      .security-image img { height: 280px; }
      .container { padding: 0 18px; }
      .category-hero h1 { font-size: 1.7rem; }
      .section-head h2 { font-size: 1.4rem; }
      .faq-item summary { padding: 16px 18px; }
      .faq-answer { padding: 0 18px 16px; }
    }

    /* Focus states */
    a:focus-visible, button:focus-visible, summary:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
      border-radius: 6px;
    }

/* roulang page: article */
:root {
    --primary: #0b1a2a;
    --primary-light: #14283c;
    --primary-dark: #050d15;
    --accent: #c9a15a;
    --accent-light: #e5c585;
    --accent-dark: #a87d3e;
    --bg: #f5f7fa;
    --bg-white: #ffffff;
    --text: #1a2b3c;
    --text-light: #4a5a6a;
    --text-muted: #8a9aad;
    --border: #e5eaf0;
    --radius: 14px;
    --radius-lg: 24px;
    --shadow-sm: 0 2px 8px rgba(11, 26, 42, 0.06);
    --shadow-md: 0 8px 30px rgba(11, 26, 42, 0.10);
    --shadow-lg: 0 16px 50px rgba(11, 26, 42, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }

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

  html { scroll-behavior: smooth; }

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

  body.no-scroll { overflow: hidden; }

  img { max-width: 100%; height: auto; display: block; }
  a { color: inherit; text-decoration: none; transition: var(--transition); }
  button { font-family: inherit; cursor: pointer; }
  input, select, textarea { font-family: inherit; }

  .container {
    width: 100%;
    max-width: 1280px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  @media (max-width: 768px) {
    .container { padding-left: 1rem; padding-right: 1rem; }
  }

  /* ----- Header / Navigation ----- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(11, 26, 42, 0.08);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 1rem;
  }

  .logo {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
  }

  .logo .logo-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    display: inline-block;
  }

  .site-nav .nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 2.2rem;
  }

  .site-nav .nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    padding: 0.5rem 0;
    position: relative;
    white-space: nowrap;
  }

  .site-nav .nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
    border-radius: 2px;
  }

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

  .site-nav .nav-links a:hover::after,
  .site-nav .nav-links a.active::after {
    width: 100%;
  }

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

  .nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 42px;
    height: 40px;
    color: var(--primary);
    font-size: 1.1rem;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
  }

  .nav-toggle:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
  }

  @media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .site-nav {
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
      box-shadow: var(--shadow-lg);
      transform: translateY(-16px);
      opacity: 0;
      pointer-events: none;
      transition: var(--transition);
      z-index: 99;
      padding: 1rem 1.25rem;
    }

    .site-nav.open {
      transform: translateY(0);
      opacity: 1;
      pointer-events: auto;
    }

    .site-nav .nav-links {
      flex-direction: column;
      align-items: flex-start;
      gap: 0.75rem;
    }

    .site-nav .nav-links a {
      display: block;
      width: 100%;
      padding: 0.6rem 0.5rem;
      font-size: 1rem;
      border-radius: 8px;
    }

    .site-nav .nav-links a:hover {
      background: rgba(11, 26, 42, 0.05);
    }

    .site-nav .nav-links a::after { display: none; }
  }

  /* ----- Buttons ----- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 50px;
    border: none;
    transition: var(--transition);
    text-align: center;
    white-space: nowrap;
    cursor: pointer;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(11, 26, 42, 0.2);
  }

  .btn-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(11, 26, 42, 0.28);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(11, 26, 42, 0.2);
  }

  .btn-gold {
    background: var(--accent);
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(201, 161, 90, 0.35);
  }

  .btn-gold:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(201, 161, 90, 0.45);
  }

  .btn-gold:active {
    transform: translateY(0);
  }

  .btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
  }

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

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

  /* ----- Breadcrumb ----- */
  .breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.72);
    margin-bottom: 1rem;
  }

  .breadcrumb a {
    color: rgba(255, 255, 255, 0.72);
    transition: var(--transition);
  }

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

  .breadcrumb .sep {
    color: rgba(255, 255, 255, 0.4);
  }

  .breadcrumb .current {
    color: rgba(255, 255, 255, 0.95);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 240px;
  }

  /* ----- Article Hero ----- */
  .article-hero {
    position: relative;
    min-height: 340px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    padding: 4rem 0;
  }

  .article-hero .hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(5, 13, 21, 0.85) 0%, rgba(11, 26, 42, 0.7) 60%, rgba(11, 26, 42, 0.4) 100%);
  }

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

  .article-hero .hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    max-width: 880px;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
  }

  .article-hero .hero-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 700px;
    line-height: 1.7;
  }

  @media (max-width: 768px) {
    .article-hero { min-height: 280px; padding: 2.5rem 0; }
    .article-hero .hero-title { font-size: 1.7rem; }
    .article-hero .hero-desc { font-size: 0.95rem; }
  }

  /* ----- Article Main ----- */
  .article-main {
    padding: 4rem 0;
    background: var(--bg);
  }

  .article-layout {
    max-width: 900px;
    margin: 0 auto;
  }

  .article-content-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 3rem;
    border: 1px solid rgba(11, 26, 42, 0.04);
  }

  .article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.2rem;
    margin-bottom: 1.8rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
  }

  .meta-badge {
    background: var(--accent);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.3rem 1rem;
    border-radius: 30px;
    letter-spacing: 0.02em;
  }

  .meta-date,
  .meta-read {
    font-size: 0.88rem;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
  }

  .article-cover {
    width: 100%;
    border-radius: 16px;
    margin-bottom: 2rem;
    object-fit: cover;
    max-height: 460px;
    box-shadow: var(--shadow-sm);
  }

  .post-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: var(--text);
  }

  .post-content h2 {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--primary);
    margin: 2.2rem 0 1rem;
    padding-left: 0.9rem;
    border-left: 4px solid var(--accent);
    border-radius: 2px;
  }

  .post-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin: 1.8rem 0 0.8rem;
  }

  .post-content p {
    margin-bottom: 1.4rem;
    color: var(--text-light);
  }

  .post-content ul,
  .post-content ol {
    margin: 0 0 1.4rem 1.6rem;
    color: var(--text-light);
  }

  .post-content ul li,
  .post-content ol li {
    margin-bottom: 0.5rem;
  }

  .post-content ul li::marker {
    color: var(--accent);
  }

  .post-content blockquote {
    border-left: 4px solid var(--accent);
    background: #faf7f0;
    padding: 1.2rem 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 1.5rem 0;
    color: var(--text-light);
    font-style: italic;
  }

  .post-content img {
    border-radius: 14px;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-sm);
  }

  .post-content a {
    color: var(--accent-dark);
    text-decoration: underline;
    text-underline-offset: 3px;
  }

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

  .post-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
  }

  .tag {
    background: var(--bg);
    color: var(--text-light);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35rem 1rem;
    border-radius: 30px;
    border: 1px solid var(--border);
    transition: var(--transition);
  }

  .tag:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
  }

  .not-found {
    text-align: center;
    padding: 3rem 1rem;
  }

  .not-found .nf-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1.2rem;
  }

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

  .not-found p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    max-width: 440px;
    margin-left: auto;
    margin-right: auto;
  }

  @media (max-width: 768px) {
    .article-main { padding: 2.5rem 0; }
    .article-content-card { padding: 1.6rem; border-radius: 18px; }
    .article-meta { gap: 0.8rem; }
  }

  /* ----- Related / Service Cards ----- */
  .related-section {
    padding: 4rem 0;
    background: #fff;
  }

  .section-heading {
    text-align: center;
    margin-bottom: 2.8rem;
  }

  .section-heading .section-kicker {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--accent-dark);
    text-transform: uppercase;
    background: rgba(201, 161, 90, 0.1);
    padding: 0.3rem 1.2rem;
    border-radius: 30px;
    margin-bottom: 0.8rem;
  }

  .section-heading h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.3;
  }

  .section-heading p {
    color: var(--text-muted);
    margin-top: 0.6rem;
    font-size: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }

  .related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.8rem;
  }

  .related-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
  }

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

  .related-card .rc-cover {
    height: 170px;
    background-size: cover;
    background-position: center;
    position: relative;
  }

  .related-card .rc-cover::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 55%, rgba(5, 13, 21, 0.55) 100%);
  }

  .related-card .rc-body {
    padding: 1.4rem 1.5rem 1.6rem;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .related-card .rc-body .rc-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-dark);
    background: rgba(201, 161, 90, 0.12);
    padding: 0.25rem 0.8rem;
    border-radius: 30px;
    align-self: flex-start;
    margin-bottom: 0.8rem;
  }

  .related-card .rc-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
    line-height: 1.4;
  }

  .related-card .rc-body p {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex: 1;
  }

  .related-card .rc-body .rc-link {
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-dark);
  }

  .related-card .rc-body .rc-link i {
    transition: transform 0.3s;
  }

  .related-card:hover .rc-body .rc-link {
    color: var(--primary);
  }

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

  @media (max-width: 768px) {
    .related-grid { grid-template-columns: 1fr; gap: 1.2rem; }
    .section-heading h2 { font-size: 1.5rem; }
  }

  /* ----- Category Guide ----- */
  .category-section {
    padding: 4rem 0;
    background: var(--bg);
  }

  .category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.8rem;
  }

  .category-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .category-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
  }

  .category-card:hover::before {
    transform: scaleX(1);
  }

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

  .category-card .cc-icon {
    width: 52px;
    height: 52px;
    background: rgba(11, 26, 42, 0.06);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
    color: var(--primary);
    font-size: 1.4rem;
    transition: var(--transition);
  }

  .category-card:hover .cc-icon {
    background: var(--primary);
    color: var(--accent-light);
  }

  .category-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.6rem;
  }

  .category-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
  }

  .category-card .cc-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: 1.2rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-dark);
  }

  .category-card .cc-link i {
    transition: transform 0.3s;
  }

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

  @media (max-width: 768px) {
    .category-grid { grid-template-columns: 1fr; gap: 1.2rem; }
  }

  /* ----- FAQ ----- */
  .faq-section {
    padding: 4rem 0;
    background: #fff;
  }

  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    border-top: 1px solid var(--border);
  }

  .faq-item {
    border-bottom: 1px solid var(--border);
    background: #fff;
  }

  .faq-item summary {
    list-style: none;
  }

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

  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.4rem 0.5rem;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    transition: var(--transition);
  }

  .faq-item summary:hover {
    color: var(--accent-dark);
  }

  .faq-item summary .faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(201, 161, 90, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--accent-dark);
    transition: var(--transition);
  }

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

  .faq-item .faq-content {
    padding: 0 2.5rem 1.4rem 0.5rem;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.75;
  }

  @media (max-width: 768px) {
    .faq-item summary { font-size: 0.95rem; }
    .faq-item .faq-content { padding-right: 0; }
  }

  /* ----- CTA ----- */
  .cta-section {
    position: relative;
    padding: 4.5rem 0;
    background-size: cover;
    background-position: center;
  }

  .cta-section .cta-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(5, 13, 21, 0.92) 0%, rgba(11, 26, 42, 0.85) 50%, rgba(20, 40, 60, 0.75) 100%);
  }

  .cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
  }

  .cta-content h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 1rem;
  }

  .cta-content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.78);
    margin-bottom: 2rem;
    line-height: 1.7;
  }

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

  @media (max-width: 768px) {
    .cta-section { padding: 3rem 0; }
    .cta-content h2 { font-size: 1.6rem; }
    .cta-content p { font-size: 0.95rem; }
  }

  /* ----- Footer ----- */
  .site-footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 4rem 0 1.5rem;
  }

  .site-footer .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
  }

  .site-footer .footer-logo {
    font-size: 1.35rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.8rem;
    letter-spacing: 0.02em;
  }

  .site-footer .footer-desc {
    font-size: 0.9rem;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.6);
    max-width: 380px;
  }

  .site-footer .footer-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1.2rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

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

  .site-footer .footer-col ul li {
    margin-bottom: 0.65rem;
  }

  .site-footer .footer-col ul li a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
  }

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

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.42);
  }

  @media (max-width: 900px) {
    .site-footer .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }

    .site-footer .footer-col:first-child {
      grid-column: 1 / -1;
    }
  }

  @media (max-width: 520px) {
    .site-footer .footer-grid {
      grid-template-columns: 1fr;
      gap: 1.8rem;
    }

    .footer-bottom {
      flex-direction: column;
      text-align: center;
      gap: 0.4rem;
    }
  }

  /* ----- Skeleton shimmer (fallback) ----- */
  .skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
    border-radius: 8px;
  }

  @keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
  }

/* roulang page: category2 */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #f97316;
  --accent-light: #fff7ed;
  --dark: #0f172a;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --white: #ffffff;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.08);
  --shadow: 0 12px 32px rgba(15,23,42,.08);
  --shadow-lg: 0 24px 60px rgba(15,23,42,.14);
  --ease: cubic-bezier(.4,0,.2,1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
a:focus-visible, summary:focus-visible, button:focus-visible {
  outline: 3px solid rgba(37,99,235,.5);
  outline-offset: 2px;
  border-radius: 6px;
}
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.86);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 28px;
}
.site-logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: .5px;
  color: var(--dark);
  line-height: 1;
  white-space: nowrap;
}
.site-logo i { color: var(--primary); margin-right: 6px; font-size: 20px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  position: relative;
  display: inline-block;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  transition: color .25s var(--ease), background .25s var(--ease);
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary);
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: var(--dark);
  font-size: 18px;
  border: 1px solid var(--border);
  background: var(--white);
  transition: all .25s var(--ease);
}
.menu-toggle:hover { color: var(--primary); border-color: var(--primary); }

/* Hero */
.hero {
  position: relative;
  padding: 120px 0 96px;
  background:
    linear-gradient(135deg, rgba(2,6,23,.88) 0%, rgba(30,58,138,.78) 100%),
    url("/assets/images/backpic/back-1.png") center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(37,99,235,.35), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  left: -100px;
  bottom: -160px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(249,115,22,.25), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; max-width: 840px; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(226,232,240,.7);
  margin-bottom: 28px;
}
.breadcrumb a { color: rgba(226,232,240,.8); transition: color .25s var(--ease); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { color: rgba(226,232,240,.4); }
.breadcrumb .current { color: #fbbf24; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.18;
  margin: 24px 0 20px;
  letter-spacing: -1px;
}
.text-gradient {
  background: linear-gradient(90deg, #60a5fa, #fbbf24);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero p {
  font-size: 18px;
  color: rgba(226,232,240,.92);
  max-width: 660px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 48px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-meta > div {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-radius: 14px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.hero-meta strong { font-size: 18px; font-weight: 700; color: #fff; }
.hero-meta span { font-size: 13px; color: rgba(226,232,240,.75); }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all .25s var(--ease);
  box-shadow: 0 8px 24px rgba(37,99,235,.28);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 14px 32px rgba(37,99,235,.38); }
.btn-primary:active { transform: translateY(0); }
.btn-lg { padding: 16px 38px; font-size: 16px; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 999px;
  background: rgba(255,255,255,.1);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,.3);
  transition: all .25s var(--ease);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(255,255,255,.2); transform: translateY(-2px); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border-radius: 999px;
  background: transparent;
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  border: 1.5px solid var(--primary);
  transition: all .25s var(--ease);
}
.btn-outline:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }

/* Sections */
.section { padding: 100px 0; }
.section-alt { background: var(--white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary);
}
.section-tag::before { content: ""; width: 22px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-head.center .section-tag::after { content: ""; width: 22px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--dark);
  line-height: 1.25;
  margin: 14px 0 16px;
  letter-spacing: -.5px;
}
.section-sub { color: var(--muted); font-size: 16px; margin: 0; }

/* Feature cards */
.app-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all .3s var(--ease);
  height: 100%;
}
.app-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,.25);
}
.app-card-img { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.app-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.app-card:hover .app-card-img img { transform: scale(1.05); }
.app-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(15,23,42,.5));
}
.app-card-body { padding: 26px 26px 30px; }
.app-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 18px;
  margin-bottom: 16px;
}
.app-card h3 { font-size: 19px; font-weight: 700; color: var(--dark); margin: 0 0 10px; }
.app-card p { font-size: 14.5px; color: var(--muted); line-height: 1.75; margin: 0; }

/* Download card */
.download-card {
  background: var(--dark);
  border-radius: 28px;
  padding: 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.download-card::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,.4), transparent 70%);
}
.download-card::after {
  content: "";
  position: absolute;
  bottom: -120px;
  left: -60px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249,115,22,.3), transparent 70%);
}
.download-grid { position: relative; z-index: 2; display: flex; gap: 48px; align-items: center; flex-wrap: wrap; }
.download-info { flex: 1 1 300px; }
.download-info h3 { font-size: 28px; font-weight: 800; margin: 0 0 8px; color: #fff; }
.download-info .version-note { color: #94a3b8; margin: 0 0 24px; }
.download-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 28px; }
.download-spec {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
}
.download-spec i { color: #60a5fa; font-size: 16px; width: 20px; text-align: center; }
.download-spec div span { display: block; font-size: 12px; color: #94a3b8; }
.download-spec div strong { font-size: 15px; color: #fff; }
.download-side {
  flex: 0 1 320px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 22px;
  padding: 32px;
}
.download-side h4 { font-size: 16px; margin: 0 0 18px; color: #fff; }
.download-side ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.download-side li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: #cbd5e1; }
.download-side li i { color: var(--accent); margin-top: 4px; font-size: 13px; }
.download-note { text-align: center; font-size: 14px; color: var(--muted); margin: 24px 0 0; }
.download-note i { color: var(--primary); margin-right: 6px; }

/* Steps */
.steps-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
.step-timeline { list-style: none; margin: 0; padding: 0; display: grid; gap: 20px; position: relative; }
.step-timeline::before { content: ""; position: absolute; left: 25px; top: 24px; bottom: 24px; width: 2px; background: var(--border); }
.timeline-item { position: relative; padding-left: 72px; }
.timeline-num {
  position: absolute;
  left: 0;
  top: 8px;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(37,99,235,.3);
  z-index: 2;
}
.timeline-body {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: all .25s var(--ease);
}
.timeline-body:hover { box-shadow: var(--shadow); border-color: rgba(37,99,235,.3); }
.timeline-body h3 { font-size: 17px; font-weight: 700; margin: 0 0 8px; color: var(--dark); }
.timeline-body p { font-size: 14.5px; color: var(--muted); margin: 0; }
.install-media { display: grid; gap: 16px; position: sticky; top: 110px; }
.install-img { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.install-img img { width: 100%; height: 100%; object-fit: cover; }
.install-img.main { aspect-ratio: 16/11; }
.install-img.sub { aspect-ratio: 21/10; }
.install-tip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: var(--accent-light);
  border: 1px solid #fed7aa;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  color: #9a3412;
}
.install-tip i { font-size: 16px; }

/* Version & Notice */
.version-list { display: grid; gap: 16px; }
.version-item {
  display: flex;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .25s var(--ease);
}
.version-item:hover { border-color: var(--primary); background: var(--white); box-shadow: var(--shadow-sm); transform: translateX(4px); }
.version-badge {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 12px;
  border-radius: 999px;
  height: max-content;
}
.version-item p { margin: 0; font-size: 14.5px; color: var(--muted); }
.notice-list { display: grid; gap: 14px; }
.notice-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 20px 22px;
  background: #fff;
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  font-size: 14.5px;
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.notice-item i { color: var(--accent); margin-top: 3px; }

/* FAQ */
.faq-list { display: grid; gap: 16px; max-width: 880px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .25s var(--ease);
  overflow: hidden;
}
.faq-item:hover { border-color: rgba(37,99,235,.3); box-shadow: var(--shadow-sm); }
.faq-item summary {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--primary); transition: transform .3s var(--ease); flex-shrink: 0; }
.faq-item[open] summary i { transform: rotate(45deg); }
.faq-item .faq-answer { padding: 0 26px 24px; font-size: 15px; color: var(--muted); line-height: 1.85; }

/* CTA */
.cta-section {
  position: relative;
  color: #fff;
  background:
    linear-gradient(120deg, rgba(15,23,42,.92), rgba(30,58,138,.85)),
    url("/assets/images/backpic/back-2.png") center / cover no-repeat;
  padding: 100px 0;
}
.cta-inner { max-width: 760px; margin: 0 auto; text-align: center; }
.cta-inner h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; margin: 0 0 16px; }
.cta-inner p { font-size: 16px; color: rgba(226,232,240,.85); margin: 0 0 32px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* Footer */
.site-footer { background: #0b1220; color: #94a3b8; padding: 80px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 48px; padding-bottom: 56px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-logo { font-size: 22px; font-weight: 800; color: #fff; margin-bottom: 16px; letter-spacing: .5px; }
.footer-logo i { color: var(--primary); margin-right: 6px; }
.footer-desc { font-size: 14px; line-height: 1.9; max-width: 380px; margin: 0; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin: 0 0 18px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.footer-col a { font-size: 14px; color: #94a3b8; transition: color .25s var(--ease); }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; padding: 24px 0; font-size: 13px; color: #64748b; }

/* Responsive */
@media (max-width: 1024px) {
  .section { padding: 80px 0; }
  .steps-layout { grid-template-columns: 1fr; }
  .install-media { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .header-inner { height: 66px; }
  .menu-toggle { display: inline-flex; }
  .site-header nav {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 24px 40px rgba(15,23,42,.1);
    padding: 16px 24px 24px;
  }
  .site-header nav.open { display: block; }
  .nav-links { flex-direction: column; align-items: stretch; gap: 4px; }
  .nav-links a { display: block; padding: 14px 18px; border-radius: 12px; }
  .nav-links a.active::after { display: none; }
  .hero { padding: 92px 0 72px; }
  .hero h1 { font-size: 34px; }
  .hero-meta { flex-direction: column; align-items: flex-start; }
  .section { padding: 64px 0; }
  .section-head { margin-bottom: 40px; }
  .download-card { padding: 32px 24px; }
  .download-grid { flex-direction: column; gap: 28px; }
  .download-specs { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .download-specs { grid-template-columns: 1fr; }
  .hero-actions .btn-primary, .hero-actions .btn-ghost { width: 100%; }
  .cta-actions .btn-primary, .cta-actions .btn-outline { width: 100%; }
  .version-item { flex-direction: column; gap: 8px; }
  .timeline-body { padding: 20px 22px; }
}

/* roulang page: category3 */
:root {
    --primary: #0b1f3a;
    --primary-deep: #071528;
    --primary-mid: #143a5e;
    --accent: #f5a623;
    --accent-deep: #dc8b07;
    --bg-soft: #f4f6fb;
    --text-head: #0f172a;
    --text-body: #3a4556;
    --text-muted: #7c8798;
    --border: #e6eaf2;
    --white: #ffffff;
    --radius: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 6px 18px rgba(11, 31, 58, .06);
    --shadow-md: 0 14px 40px rgba(11, 31, 58, .10);
    --shadow-lg: 0 24px 60px rgba(11, 31, 58, .16);
    --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  }

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

  body {
    margin: 0;
    font-family: var(--font);
    background: var(--white);
    color: var(--text-body);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

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

  a {
    text-decoration: none;
    color: inherit;
    transition: color .25s ease, background .25s ease, border-color .25s ease, transform .25s ease;
  }

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

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

  h1,
  h2,
  h3,
  h4 {
    color: var(--text-head);
    line-height: 1.3;
    margin: 0 0 .8em;
  }

  p {
    margin: 0 0 1rem;
  }

  .container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* 导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .3s ease, background .3s ease;
  }

  .site-header.is-scrolled {
    background: rgba(255, 255, 255, .97);
    box-shadow: var(--shadow-sm);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    height: 78px;
  }

  .site-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: .01em;
    color: var(--primary);
    white-space: nowrap;
  }

  .logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(245, 166, 35, .2);
  }

  .site-header nav {
    margin-left: auto;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 2.6rem;
    margin: 0;
  }

  .nav-links a {
    position: relative;
    display: inline-block;
    padding: 6px 0;
    color: var(--text-body);
    font-weight: 500;
    font-size: .95rem;
    line-height: 1.4;
  }

  .nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: width .25s ease;
  }

  .nav-links a:hover,
  .nav-links a.active {
    color: var(--primary);
  }

  .nav-links a:hover::after,
  .nav-links a.active::after {
    width: 100%;
  }

  .header-cta a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-size: .9rem;
    font-weight: 600;
    transition: all .25s ease;
  }

  .header-cta a:hover {
    background: var(--primary-mid);
    transform: translateY(-1px);
  }

  /* Hero */
  .page-hero {
    position: relative;
    padding: 110px 0;
    color: #fff;
    background: linear-gradient(118deg, rgba(7, 21, 40, .95) 0%, rgba(15, 44, 74, .90) 52%, rgba(20, 64, 102, .82) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    overflow: hidden;
  }

  .page-hero::after {
    content: '';
    position: absolute;
    right: -120px;
    top: -100px;
    width: 340px;
    height: 340px;
    border-radius: 50%;
    background: rgba(245, 166, 35, .12);
    filter: blur(70px);
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: 56px;
    align-items: center;
    position: relative;
    z-index: 2;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .18);
    padding: 8px 16px;
    border-radius: 999px;
    font-size: .85rem;
    letter-spacing: .04em;
    margin-bottom: 24px;
  }

  .tag-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
  }

  .page-hero h1 {
    font-size: clamp(2.1rem, 5vw, 3.4rem);
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: .01em;
  }

  .page-hero .lead {
    font-size: 1.05rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, .86);
    max-width: 540px;
    margin-bottom: 28px;
  }

  .hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 26px;
  }

  .hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: .9rem;
    color: rgba(255, 255, 255, .78);
  }

  .hero-meta i {
    color: var(--accent);
    margin-right: 6px;
  }

  .hero-visual {
    display: flex;
    justify-content: flex-end;
  }

  .hero-card {
    width: 100%;
    max-width: 360px;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .22);
    backdrop-filter: blur(16px);
    border-radius: 24px;
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-lg);
  }

  .hero-card-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px;
  }

  .badge-light {
    background: rgba(255, 255, 255, .18);
    border: 1px solid rgba(255, 255, 255, .24);
    color: #fff;
    font-size: .78rem;
    padding: 5px 12px;
    border-radius: 999px;
  }

  .hero-qr {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 18px;
    margin-bottom: 16px;
    background: rgba(255, 255, 255, .06);
  }

  .hero-card p {
    font-size: .9rem;
    color: rgba(255, 255, 255, .82);
    margin-bottom: 16px;
  }

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

  /* 按钮 */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-radius: 999px;
    padding: 14px 30px;
    font-size: .95rem;
    font-weight: 600;
    line-height: 1.4;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  }

  .btn:focus-visible {
    outline: 3px solid rgba(245, 166, 35, .45);
    outline-offset: 2px;
  }

  .btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 20px rgba(245, 166, 35, .35);
  }

  .btn-primary:hover {
    background: var(--accent-deep);
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(245, 166, 35, .4);
  }

  .btn-ghost {
    border-color: rgba(255, 255, 255, .45);
    color: #fff;
    background: rgba(255, 255, 255, .06);
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, .14);
    border-color: rgba(255, 255, 255, .7);
    transform: translateY(-2px);
  }

  .btn-accent {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 20px rgba(245, 166, 35, .3);
  }

  .btn-accent:hover {
    background: var(--accent-deep);
    transform: translateY(-2px);
  }

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

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

  .btn-outline-light {
    border-color: rgba(255, 255, 255, .5);
    color: #fff;
  }

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

  /* 板块 */
  .section {
    padding: 96px 0;
  }

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

  .section-head {
    max-width: 720px;
    margin-bottom: 56px;
  }

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

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(245, 166, 35, .12);
    color: var(--accent-deep);
    font-size: .82rem;
    font-weight: 600;
    letter-spacing: .06em;
    padding: 7px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
  }

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

  .section-head h2 {
    font-size: clamp(1.8rem, 3.4vw, 2.5rem);
    margin-bottom: 14px;
  }

  .section-head p {
    color: var(--text-muted);
    font-size: 1rem;
  }

  /* 核心特性 */
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  }

  .card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: #d9e0ec;
  }

  .card-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(245, 166, 35, .12);
    color: var(--accent-deep);
    font-size: 1.35rem;
    margin-bottom: 18px;
  }

  .feature-card h3 {
    font-size: 1.08rem;
    margin-bottom: 8px;
  }

  .feature-card p {
    font-size: .92rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
  }

  /* 下载信息 */
  .download-panel {
    position: relative;
    background: linear-gradient(115deg, rgba(7, 21, 40, .96) 0%, rgba(15, 44, 74, .90) 55%, rgba(20, 64, 102, .88) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    border-radius: 28px;
    padding: 56px;
    color: #fff;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 40px;
    align-items: center;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
  }

  .download-panel h2 {
    color: #fff;
    font-size: 2rem;
  }

  .spec-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 22px;
  }

  .spec-item {
    background: rgba(255, 255, 255, .10);
    border: 1px solid rgba(255, 255, 255, .16);
    border-radius: 16px;
    padding: 16px 18px;
  }

  .spec-value {
    display: block;
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 2px;
  }

  .spec-label {
    font-size: .82rem;
    color: rgba(255, 255, 255, .72);
  }

  .download-actions {
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
  }

  .md5-tip {
    font-size: .8rem;
    font-family: 'SFMono-Regular', Consolas, monospace;
    color: rgba(255, 255, 255, .72);
    background: rgba(255, 255, 255, .08);
    border: 1px dashed rgba(255, 255, 255, .25);
    padding: 10px 14px;
    border-radius: 10px;
    word-break: break-all;
  }

  /* 安装步骤 */
  .steps-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }

  .steps-illustration {
    width: 100%;
    border-radius: 24px;
    object-fit: cover;
    box-shadow: var(--shadow-md);
  }

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

  .step-item {
    display: flex;
    gap: 18px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: transform .25s ease, box-shadow .25s ease;
  }

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

  .step-number {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: .95rem;
  }

  .step-content h3 {
    font-size: 1.02rem;
    margin-bottom: 4px;
  }

  .step-content p {
    font-size: .9rem;
    color: var(--text-muted);
    margin: 0;
  }

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

  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    transition: box-shadow .25s ease, border-color .25s ease;
  }

  .faq-item[open] {
    border-color: #d9e0ec;
    box-shadow: var(--shadow-sm);
  }

  .faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 20px 52px 20px 24px;
    position: relative;
    font-weight: 700;
    color: var(--text-head);
    font-size: 1rem;
  }

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

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

  .faq-item summary::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: .85rem;
    transition: transform .25s ease;
  }

  .faq-item[open] summary::after {
    transform: translateY(-50%) rotate(180deg);
    color: var(--accent-deep);
  }

  .faq-content {
    padding: 0 24px 22px;
    color: var(--text-muted);
    font-size: .95rem;
    line-height: 1.8;
  }

  /* 安全提示 */
  .safety-card {
    background: linear-gradient(120deg, #fffdf7, #fff6e8);
    border: 1px solid #f3dfb5;
    border-radius: 24px;
    padding: 36px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 26px;
    align-items: center;
  }

  .safety-icon {
    width: 60px;
    height: 60px;
    border-radius: 18px;
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 10px 24px rgba(245, 166, 35, .35);
  }

  .safety-card h2 {
    font-size: 1.4rem;
    margin-bottom: 6px;
  }

  .safety-card p {
    margin: 0;
    color: var(--text-body);
    max-width: 600px;
  }

  .safety-list {
    display: grid;
    gap: 10px;
    font-size: .9rem;
    font-weight: 600;
    color: var(--primary);
  }

  .safety-list li::before {
    content: '✓';
    color: var(--accent-deep);
    font-weight: 900;
    margin-right: 8px;
  }

  /* CTA */
  .cta-section {
    position: relative;
    padding: 100px 0;
    background: linear-gradient(120deg, rgba(7, 21, 40, .95) 0%, rgba(15, 44, 74, .90) 50%, rgba(20, 64, 102, .88) 100%), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    color: #fff;
    overflow: hidden;
  }

  .cta-section h2 {
    color: #fff;
    font-size: clamp(1.9rem, 3.6vw, 2.7rem);
    margin-bottom: 14px;
  }

  .cta-section p {
    color: rgba(255, 255, 255, .82);
    max-width: 620px;
    margin: 0 auto 32px;
  }

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

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

  /* 页脚 */
  .site-footer {
    background: var(--primary-deep);
    color: #a9b5c8;
    padding: 64px 0 32px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
  }

  .footer-logo {
    color: #fff;
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 14px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
  }

  .footer-logo::before {
    content: '';
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
  }

  .footer-desc {
    font-size: .9rem;
    line-height: 1.8;
    max-width: 420px;
    margin: 0;
  }

  .footer-col h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 18px;
  }

  .footer-col ul li {
    margin-bottom: 12px;
  }

  .footer-col a {
    color: #a9b5c8;
    font-size: .9rem;
    transition: color .25s ease;
  }

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

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    padding-top: 28px;
    font-size: .82rem;
    color: #7f8da6;
  }

  .footer-bottom span {
    display: inline-block;
  }

  /* 响应式 */
  @media (max-width: 1024px) {
    .feature-grid {
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .hero-grid {
      gap: 40px;
      grid-template-columns: 1fr;
    }

    .hero-visual {
      justify-content: center;
    }

    .hero-card {
      max-width: 340px;
    }

    .download-panel {
      grid-template-columns: 1fr;
    }

    .steps-grid {
      grid-template-columns: 1fr;
      gap: 40px;
    }

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

  @media (max-width: 860px) {
    .header-inner {
      height: 72px;
      gap: 16px;
    }

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

    .site-header nav {
      margin-left: 0;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }

    .site-header nav::-webkit-scrollbar {
      display: none;
    }

    .nav-links {
      gap: 1.5rem;
      white-space: nowrap;
      padding: 0 2px 4px;
    }

    .header-cta span {
      display: none;
    }

    .header-cta a {
      padding: 9px 12px;
    }
  }

  @media (max-width: 768px) {
    .section {
      padding: 72px 0;
    }

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

    .page-hero {
      padding: 80px 0;
    }

    .download-panel {
      padding: 40px 24px;
    }

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

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

    .footer-bottom {
      flex-direction: column;
    }
  }

  @media (max-width: 520px) {
    .site-logo {
      font-size: 1.02rem;
      letter-spacing: 0;
    }

    .nav-links {
      gap: 1.15rem;
    }

    .nav-links a {
      font-size: .88rem;
    }

    .header-cta .cta-text {
      display: none;
    }

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

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

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

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

    .hero-meta {
      flex-direction: column;
      gap: 10px;
    }

    .page-hero h1 {
      font-size: 1.95rem;
    }

    .faq-item summary {
      padding-left: 18px;
    }

    .faq-content {
      padding-left: 18px;
    }

    .safety-card {
      padding: 28px 22px;
    }
  }