:root {
      --primary: #3b82f6;
      --primary-dark: #2563eb;
      --primary-light: #3b82f6;
      --accent: #0284c7;
      --accent-2: #0ea5e9;
      --bg: #f8fafc;
      --bg-2: #f1f5f9;
      --surface: #ffffff;
      --surface-light: #f8fafc;
      --surface-hover: #eef2ff;
      --text: #0f172a;
      --text-secondary: #334155;
      --muted: #64748b;
      --border: rgba(0,0,0,0.06);
      --border-strong: rgba(59,130,246,0.2);
      --radius-sm: 12px;
      --radius: 18px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,.04);
      --shadow: 0 4px 16px rgba(0,0,0,.06);
      --shadow-lg: 0 12px 40px rgba(0,0,0,.08);
      --shadow-glow: 0 0 60px rgba(59,130,246,.06);
      --transition: .28s cubic-bezier(.4,0,.2,1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      min-height: 100vh;
      background: linear-gradient(180deg, #f0f4ff 0%, #f8fafc 30%, #f1f5f9 100%);
      color: var(--text);
      line-height: 1.72;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    ::selection { background: rgba(59,130,246,.18); color: var(--text); }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    button { appearance: none; border: none; cursor: pointer; font: inherit; }

    /* ============ LAYOUT ============ */
    .page { max-width: 1200px; margin: 0 auto; padding: 0 24px 80px; }

    /* ============ HEADER / TOPBAR ============ */
    .topbar {
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
      padding: 16px 28px; margin-top: 16px;
      background: rgba(255,255,255,.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border); border-radius: var(--radius-xl);
      position: sticky; top: 14px; z-index: 50;
      box-shadow: var(--shadow);
    }
    .brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
    .brand-logo {
      width: 44px; height: 44px; border-radius: 14px;
      background: linear-gradient(135deg, #3b82f6, #06b6d4);
      box-shadow: 0 8px 24px rgba(59,130,246,.2);
      display: grid; place-items: center; color: #fff;
      font-size: 20px; font-weight: 800; letter-spacing: -.02em;
    }
    .brand-info { display: flex; flex-direction: column; gap: 2px; }
    .brand-info h1 { font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; line-height: 1.2; color: #0f172a; }
    .brand-info span { color: var(--muted); font-size: .78rem; }
    .nav-area { display: flex; align-items: center; gap: 16px; }
    .nav-download-btn {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 11px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .92rem;
      box-shadow: 0 6px 20px rgba(59,130,246,.25);
      transition: transform var(--transition), box-shadow var(--transition);
      white-space: nowrap;
    }
    .nav-download-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(59,130,246,.35); color: #fff; }
    .nav-download-btn svg { width: 16px; height: 16px; }
    .menu-links { display: flex; align-items: center; gap: 6px; }
    .menu-links a {
      color: var(--text-secondary); font-size: .9rem; padding: 8px 14px;
      border-radius: 10px; transition: all var(--transition);
    }
    .menu-links a:hover, .menu-links a:focus { color: var(--primary); background: rgba(59,130,246,.06); }
    .mobile-menu-btn {
      display: none; width: 42px; height: 42px; border-radius: 12px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      align-items: center; justify-content: center; color: var(--text);
      flex-shrink: 0;
    }
    .mobile-menu-btn .hamburger { width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; transition: background var(--transition); }
    .mobile-menu-btn .hamburger::before,
    .mobile-menu-btn .hamburger::after { content: ""; position: absolute; width: 18px; height: 2px; background: inherit; border-radius: 2px; left: 0; transition: transform var(--transition); }
    .mobile-menu-btn .hamburger::before { top: -6px; }
    .mobile-menu-btn .hamburger::after { top: 6px; }

    /* ============ SIDEBAR ============ */
    .overlay { position: fixed; inset: 0; background: rgba(0,0,0,.3); opacity: 0; visibility: hidden; transition: visibility .3s, opacity .3s; z-index: 60; }
    .overlay.show { opacity: 1; visibility: visible; }
    .sidebar {
      position: fixed; top: 0; right: -340px; width: min(320px, 82vw); height: 100vh; height: 100dvh;
      padding: 28px 22px; background: #fff; box-shadow: -20px 0 60px rgba(0,0,0,.12);
      transition: right var(--transition); z-index: 70;
      display: flex; flex-direction: column; gap: 8px; overflow-y: auto;
    }
    .sidebar.open { right: 0; }
    .sidebar-close {
      align-self: flex-end; width: 40px; height: 40px; border-radius: 12px;
      background: rgba(0,0,0,.04); color: var(--text); font-size: 1.1rem;
      display: grid; place-items: center; margin-bottom: 12px;
    }
    .sidebar .side-dl-btn {
      display: flex; align-items: center; justify-content: center; gap: 8px;
      padding: 14px 18px; border-radius: 14px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .98rem; margin-bottom: 8px;
      box-shadow: 0 6px 20px rgba(59,130,246,.22);
    }
    .sidebar nav { display: grid; gap: 4px; }
    .sidebar nav a {
      color: var(--text-secondary); font-size: .96rem; padding: 13px 16px;
      border-radius: 12px; transition: all var(--transition);
    }
    .sidebar nav a:hover, .sidebar nav a:focus { color: var(--primary); background: rgba(59,130,246,.06); }

    /* ============ HERO ============ */
    .hero {
      position: relative; overflow: hidden; margin-top: 28px;
      padding: 48px 40px 52px; border-radius: var(--radius-xl);
      background: #fff; border: 1px solid var(--border);
      box-shadow: var(--shadow-lg);
    }
    .hero::before {
      content: ""; position: absolute; top: -60%; right: -20%; width: 500px; height: 500px;
      background: radial-gradient(circle, rgba(59,130,246,.04), transparent 70%);
      pointer-events: none;
    }
    .hero::after {
      content: ""; position: absolute; bottom: -30%; left: -10%; width: 400px; height: 400px;
      background: radial-gradient(circle, rgba(6,182,212,.03), transparent 70%);
      pointer-events: none;
    }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.2fr 1fr; gap: 44px; align-items: center; }
    .hero-text h2 {
      font-size: clamp(1.8rem, 3.2vw, 2.8rem); font-weight: 800; line-height: 1.15;
      letter-spacing: -.02em; margin-bottom: 18px; color: #0f172a;
    }
    .hero-text h2 span { color: var(--primary); }
    .hero-text p { color: var(--muted); font-size: 1rem; max-width: 580px; margin-bottom: 28px; line-height: 1.8; }
    .hero-stats { display: flex; gap: 32px; flex-wrap: wrap; margin-bottom: 28px; }
    .hero-stat { text-align: center; }
    .hero-stat .num { font-size: 2rem; font-weight: 800; color: var(--primary); line-height: 1.1; }
    .hero-stat .lbl { font-size: .82rem; color: var(--muted); margin-top: 4px; }
    .hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
    .btn-primary {
      display: inline-flex; align-items: center; gap: 10px;
      padding: 15px 30px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: 1rem;
      box-shadow: 0 12px 30px rgba(59,130,246,.22);
      transition: all var(--transition);
    }
    .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(59,130,246,.32); color: #fff; }
    .btn-outline {
      display: inline-flex; align-items: center; gap: 10px;
      padding: 15px 30px; border-radius: 999px;
      background: transparent; border: 1.5px solid rgba(59,130,246,.25);
      color: var(--primary); font-weight: 600; font-size: 1rem;
      transition: all var(--transition);
    }
    .btn-outline:hover { border-color: var(--primary); background: rgba(59,130,246,.04); }
    .hero-visual { display: grid; gap: 16px; }
    .hero-card {
      padding: 22px 24px; border-radius: var(--radius-lg);
      background: #f8fafc; border: 1px solid var(--border);
    }
    .hero-card h4 { font-size: .95rem; color: var(--primary); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
    .hero-card ul { list-style: none; display: grid; gap: 10px; }
    .hero-card li { color: var(--text-secondary); font-size: .9rem; display: flex; align-items: flex-start; gap: 10px; }
    .hero-card li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); margin-top: 7px; flex-shrink: 0; }

    /* ============ SECTIONS ============ */
    .section { margin-top: 32px; padding: 32px 0; border-bottom: 1px solid rgba(0,0,0,.04); }
    .section:last-of-type { border-bottom: none; }
    .section-header { text-align: center; margin-bottom: 36px; }
    .section-header h2 {
      font-size: clamp(1.5rem, 2.4vw, 2rem); font-weight: 800; letter-spacing: -.01em;
      margin-bottom: 10px; color: #0f172a;
    }
    .section-header h2 span { color: var(--primary); }
    .section-header p { color: var(--muted); font-size: .95rem; max-width: 600px; margin: 0 auto; }

    /* Cards Grid */
    .cards-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
    .cards-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; }
    .card {
      padding: 28px 26px; border-radius: var(--radius-lg);
      background: var(--surface); border: 1px solid var(--border);
      transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
      position: relative; overflow: hidden;
    }
    .card::before {
      content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
      background: linear-gradient(90deg, transparent, var(--primary), transparent);
      opacity: 0; transition: opacity var(--transition);
    }
    .card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
    .card:hover::before { opacity: 1; }
    .card-icon {
      width: 48px; height: 48px; border-radius: 14px; margin-bottom: 16px;
      display: grid; place-items: center; font-size: 22px;
      background: rgba(59,130,246,.08); color: var(--primary);
    }
    .card h3 { font-size: 1.08rem; font-weight: 700; margin-bottom: 10px; color: #0f172a; }
    .card p { color: var(--muted); font-size: .9rem; line-height: 1.7; }

    /* ============ DOWNLOAD SECTION ============ */
    .download-section {
      padding: 36px 32px; border-radius: var(--radius-xl);
      background: #fff; border: 1px solid var(--border); box-shadow: var(--shadow);
      position: relative; overflow: hidden;
    }
    .download-section::before {
      content: ""; position: absolute; top: -60px; right: -60px; width: 260px; height: 260px;
      background: radial-gradient(circle, rgba(59,130,246,.04), transparent 70%); pointer-events: none;
    }
    .download-grid { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
    .dl-card {
      padding: 28px 22px; border-radius: var(--radius-lg); text-align: center;
      background: #f8fafc; border: 1px solid var(--border);
      transition: all var(--transition); position: relative; overflow: hidden;
    }
    .dl-card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
    .dl-card.featured { border-color: var(--border-strong); background: #fff; box-shadow: var(--shadow); }
    .dl-card .dl-badge {
      position: absolute; top: 0; right: 0; padding: 6px 16px; border-radius: 0 18px 0 16px;
      background: linear-gradient(135deg, #3b82f6, #06b6d4); color: #fff; font-size: .75rem; font-weight: 700;
    }
    .dl-card .dl-icon { font-size: 40px; margin-bottom: 14px; }
    .dl-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; color: #0f172a; }
    .dl-card .dl-info { color: var(--muted); font-size: .85rem; margin-bottom: 18px; }
    .dl-card .dl-btn {
      display: block; padding: 14px 0; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .95rem;
      transition: all var(--transition); box-shadow: 0 6px 18px rgba(59,130,246,.18);
    }
    .dl-card .dl-btn:hover { opacity: .9; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(59,130,246,.28); color: #fff; }
    .dl-card .dl-pwd { color: var(--muted); font-size: .78rem; margin-top: 10px; }

    /* ============ FAQ ============ */
    .faq-list { display: grid; gap: 14px; }
    .faq-item {
      padding: 22px 26px; border-radius: var(--radius-lg);
      background: var(--surface); border: 1px solid var(--border);
      transition: all var(--transition);
    }
    .faq-item:hover { border-color: var(--border-strong); }
    .faq-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; color: #0f172a; }
    .faq-item h3 .q-mark { color: var(--primary); font-weight: 800; }
    .faq-item .faq-answer { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }

    /* ============ ARTICLES ============ */
    .articles-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
    .article-card {
      padding: 24px 26px; border-radius: var(--radius-lg);
      background: var(--surface); border: 1px solid var(--border);
      transition: all var(--transition);
    }
    .article-card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: var(--shadow); }
    .article-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
    .article-card h3 a { color: #0f172a; }
    .article-card h3 a:hover { color: var(--primary); }
    .article-card p { color: var(--muted); font-size: .88rem; line-height: 1.65; margin-bottom: 10px; }
    .article-card .art-meta { font-size: .78rem; color: var(--muted); display: flex; gap: 14px; }

    /* ============ FRIEND LINKS ============ */
    .friend-links { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
    .friend-link {
      padding: 20px; border-radius: var(--radius); text-align: center;
      background: var(--surface); border: 1px solid var(--border);
      transition: all var(--transition);
    }
    .friend-link:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: var(--shadow); }
    .friend-link .fl-name { font-weight: 700; font-size: .95rem; color: #0f172a; margin-bottom: 4px; }
    .friend-link .fl-desc { color: var(--muted); font-size: .8rem; }

    /* ============ SCENE CARDS ============ */
    .scene-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
    .scene-card {
      padding: 28px 24px; border-radius: var(--radius-lg);
      background: var(--surface); border: 1px solid var(--border);
      transition: all var(--transition); text-align: center;
    }
    .scene-card:hover { border-color: var(--border-strong); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
    .scene-card .sc-icon { font-size: 36px; margin-bottom: 14px; }
    .scene-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: #0f172a; }
    .scene-card p { color: var(--muted); font-size: .88rem; line-height: 1.65; }

    /* ============ FOOTER ============ */
    .footer {
      display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap;
      padding: 28px 0 0; color: var(--muted); font-size: .85rem;
    }
    .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
    .footer-links a { color: var(--muted); font-size: .85rem; }
    .footer-links a:hover { color: var(--primary); }

    /* ============ FLOAT AD (slim) ============ */
    .float-ad {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
      display: flex; justify-content: center; align-items: center; gap: 14px;
      padding: 10px 20px;
      background: rgba(255,255,255,.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid var(--border); box-shadow: 0 -4px 20px rgba(0,0,0,.05);
    }
    .float-ad .ad-dl-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 8px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .88rem;
      box-shadow: 0 4px 14px rgba(59,130,246,.22);
      transition: all var(--transition); white-space: nowrap;
    }
    .float-ad .ad-dl-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(59,130,246,.32); color: #fff; }
    .float-ad .btn-top {
      padding: 7px 14px; border-radius: 999px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      color: var(--muted); font-size: .8rem; white-space: nowrap;
      transition: all var(--transition);
    }
    .float-ad .btn-top:hover { background: rgba(0,0,0,.08); color: var(--text); }
    .float-ad .btn-close {
      width: 30px; height: 30px; border-radius: 50%; background: rgba(0,0,0,.04);
      color: var(--muted); font-size: .82rem; display: grid; place-items: center;
      transition: all var(--transition);
    }
    .float-ad .btn-close:hover { background: rgba(0,0,0,.1); color: var(--text); }

    /* ============ ANIMATIONS ============ */
    .fade-up {
      opacity: 0; transform: translateY(28px);
      transition: opacity .6s cubic-bezier(.4,0,.2,1), transform .6s cubic-bezier(.4,0,.2,1);
    }
    .fade-up.visible { opacity: 1; transform: translateY(0); }

    .hidden { display: none !important; }

    /* ============ RESPONSIVE ============ */
    @media (max-width: 1024px) {
      .cards-3, .download-grid, .scene-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .friend-links { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .hero-inner { grid-template-columns: 1fr; gap: 32px; }
    }
    @media (max-width: 820px) {
      .page { padding: 0 16px 70px; }
      .topbar { padding: 14px 18px; margin-top: 10px; border-radius: var(--radius-lg); }
      .menu-links { display: none; }
      .nav-download-btn { display: none; }
      .mobile-menu-btn { display: inline-flex; }
      .hero { padding: 32px 22px 36px; margin-top: 20px; }
      .hero-stats { gap: 20px; }
      .hero-stat .num { font-size: 1.5rem; }
      .cards-3, .cards-2, .download-grid, .scene-grid, .articles-grid { grid-template-columns: 1fr; }
      .friend-links { grid-template-columns: 1fr 1fr; }
      .section-header { margin-bottom: 24px; }
      .float-ad { padding: 8px 14px; gap: 10px; }
      .float-ad .ad-dl-btn { padding: 7px 16px; font-size: .82rem; }
    }
    @media (max-width: 520px) {
      .page { padding: 0 10px 60px; }
      .topbar { padding: 12px 14px; border-radius: var(--radius); }
      .brand-logo { width: 38px; height: 38px; border-radius: 10px; font-size: 17px; }
      .brand-info h1 { font-size: 1rem; }
      .brand-info span { font-size: .7rem; }
      .hero { padding: 24px 16px 28px; border-radius: var(--radius-lg); }
      .hero-text h2 { font-size: 1.5rem; }
      .hero-text p { font-size: .9rem; }
      .btn-primary, .btn-outline { padding: 12px 22px; font-size: .9rem; }
      .section { margin-top: 20px; padding: 20px 0; }
      .section-header h2 { font-size: 1.3rem; }
      .friend-links { grid-template-columns: 1fr; }
      .float-ad { padding: 8px 10px; gap: 8px; }
      .float-ad .ad-dl-btn { padding: 6px 14px; font-size: .78rem; }
      .float-ad .btn-top { font-size: .75rem; padding: 6px 10px; }
    }
  

    :root {
      --primary: #3b82f6; --primary-dark: #2563eb; --primary-light: #3b82f6;
      --accent: #0284c7; --accent-2: #0ea5e9;
      --bg: #f8fafc; --bg-2: #f1f5f9; --surface: #ffffff; --surface-light: #f8fafc;
      --text: #0f172a; --text-secondary: #334155; --muted: #64748b;
      --border: rgba(0,0,0,0.06); --border-strong: rgba(59,130,246,0.2);
      --radius-sm: 12px; --radius: 18px; --radius-lg: 24px; --radius-xl: 32px;
      --shadow: 0 4px 16px rgba(0,0,0,.06); --shadow-lg: 0 12px 40px rgba(0,0,0,.08);
      --shadow-glow: 0 0 60px rgba(59,130,246,.06);
      --transition: .28s cubic-bezier(.4,0,.2,1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      min-height: 100vh; background: linear-gradient(180deg, #f0f4ff 0%, #f8fafc 30%, #f1f5f9 100%); color: var(--text); line-height: 1.72;
      -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
    }
    ::selection { background: rgba(59,130,246,.18); color: var(--text); }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    button { appearance: none; border: none; cursor: pointer; font: inherit; }

    .page { max-width: 1200px; margin: 0 auto; padding: 0 24px 130px; }

    .topbar {
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
      padding: 18px 28px; margin-top: 16px;
      background: rgba(255,255,255,.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border); border-radius: var(--radius-xl);
      position: sticky; top: 14px; z-index: 50; box-shadow: 0 4px 16px rgba(0,0,0,.06);
    }
    .brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
    .brand-logo { width: 44px; height: 44px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #06b6d4); box-shadow: 0 8px 24px rgba(59,130,246,.28); display: grid; place-items: center; color: #fff; font-size: 20px; font-weight: 800; }
    .brand-info { display: flex; flex-direction: column; gap: 2px; }
    .brand-info h1 { font-size: 1.2rem; font-weight: 700; color: #0f172a; }
    .brand-info span { color: var(--muted); font-size: .78rem; }
    .nav-area { display: flex; align-items: center; gap: 16px; }
    .nav-download-btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; border-radius: 999px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .92rem; box-shadow: 0 6px 20px rgba(59,130,246,.3); transition: transform var(--transition), box-shadow var(--transition); white-space: nowrap; }
    .nav-download-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(59,130,246,.42); color: #fff; }
    .menu-links { display: flex; align-items: center; gap: 6px; }
    .menu-links a { color: var(--text-secondary); font-size: .9rem; padding: 8px 14px; border-radius: 10px; transition: all var(--transition); }
    .menu-links a:hover { color: var(--primary); background: rgba(59,130,246,.06); }
    .mobile-menu-btn { display: none; width: 42px; height: 42px; border-radius: 12px; background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08); align-items: center; justify-content: center; color: var(--text); flex-shrink: 0; }
    .mobile-menu-btn .hamburger { width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; }
    .mobile-menu-btn .hamburger::before, .mobile-menu-btn .hamburger::after { content: ""; position: absolute; width: 18px; height: 2px; background: inherit; border-radius: 2px; left: 0; }
    .mobile-menu-btn .hamburger::before { top: -6px; }
    .mobile-menu-btn .hamburger::after { top: 6px; }

    .overlay { position: fixed; inset: 0; background: rgba(0,0,0,.3); opacity: 0; visibility: hidden; transition: visibility .3s, opacity .3s; z-index: 60; }
    .overlay.show { opacity: 1; visibility: visible; }
    .sidebar { position: fixed; top: 0; right: -340px; width: min(320px, 82vw); height: 100vh; height: 100dvh; padding: 28px 22px; background: #fff; box-shadow: -20px 0 60px rgba(0,0,0,.12); transition: right var(--transition); z-index: 70; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; }
    .sidebar.open { right: 0; }
    .sidebar-close { align-self: flex-end; width: 40px; height: 40px; border-radius: 12px; background: rgba(0,0,0,.04); color: var(--text); font-size: 1.1rem; display: grid; place-items: center; margin-bottom: 12px; }
    .sidebar .side-dl-btn { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 18px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .98rem; margin-bottom: 8px; }
    .sidebar nav { display: grid; gap: 4px; }
    .sidebar nav a { color: var(--text-secondary); font-size: .96rem; padding: 13px 16px; border-radius: 12px; transition: all var(--transition); }
    .sidebar nav a:hover { color: var(--primary); background: rgba(59,130,246,.06); }

    .page-hero {
      margin-top: 28px; padding: 44px 40px; border-radius: var(--radius-xl);
      background: #fff; border: 1px solid var(--border); box-shadow: 0 12px 40px rgba(0,0,0,.08);
      text-align: center; position: relative; overflow: hidden;
    }
    .page-hero::before { content: ""; position: absolute; top: -40%; right: -15%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(59,130,246,.04), transparent 70%); pointer-events: none; }
    .page-hero h2 { font-size: clamp(1.6rem, 2.6vw, 2.3rem); font-weight: 800; margin-bottom: 14px; position: relative; z-index: 1; color: #0f172a; }
    .page-hero p { color: var(--muted); font-size: 1rem; max-width: 700px; margin: 0 auto; position: relative; z-index: 1; }

    .section { margin-top: 32px; padding: 32px 0; border-bottom: 1px solid rgba(0,0,0,.04); }
    .section:last-of-type { border-bottom: none; }
    .section-header { text-align: center; margin-bottom: 36px; }
    .section-header h2 { font-size: clamp(1.4rem, 2.1vw, 1.8rem); font-weight: 800; margin-bottom: 10px; color: #0f172a; }
    .section-header h2 span { color: var(--primary); }
    .section-header p { color: var(--muted); font-size: .95rem; max-width: 600px; margin: 0 auto; }

    .dl-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; }
    .dl-hero-card {
      padding: 34px 26px; border-radius: var(--radius-xl); text-align: center;
      background: #f8fafc; border: 1px solid var(--border);
      transition: all var(--transition); position: relative; overflow: hidden;
    }
    .dl-hero-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
    .dl-hero-card.featured { border-color: var(--border-strong); background: #fff; box-shadow: var(--shadow); }
    .dl-hero-card .dl-badge { position: absolute; top: 0; right: 0; padding: 7px 20px; border-radius: 0 24px 0 20px; background: linear-gradient(135deg, #3b82f6, #06b6d4); color: #fff; font-size: .78rem; font-weight: 700; }
    .dl-hero-card .dl-icon { font-size: 52px; margin-bottom: 16px; }
    .dl-hero-card h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; color: #0f172a; }
    .dl-hero-card .dl-info { color: var(--muted); font-size: .88rem; margin-bottom: 10px; }
    .dl-hero-card .dl-features { display: grid; gap: 6px; margin-bottom: 22px; text-align: left; padding: 0 10px; }
    .dl-hero-card .dl-features li { color: var(--text-secondary); font-size: .84rem; display: flex; align-items: center; gap: 8px; }
    .dl-hero-card .dl-features li::before { content: "✓"; color: var(--primary-light); font-weight: 700; flex-shrink: 0; }
    .dl-hero-card .dl-btn { display: block; padding: 16px 0; border-radius: 999px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: 1rem; transition: all var(--transition); box-shadow: 0 8px 22px rgba(59,130,246,.22); }
    .dl-hero-card .dl-btn:hover { opacity: .9; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(59,130,246,.38); color: #fff; }
    .dl-hero-card .dl-pwd { color: var(--accent); font-size: .9rem; margin-top: 12px; font-weight: 600; }

    .steps { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
    .step-card { padding: 26px 20px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--border); text-align: center; transition: all var(--transition); }
    .step-card:hover { border-color: var(--border-strong); transform: translateY(-3px); box-shadow: var(--shadow); }
    .step-num { width: 40px; height: 40px; border-radius: 50%; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 800; font-size: 1.1rem; display: grid; place-items: center; margin: 0 auto 14px; }
    .step-card h4 { font-size: .98rem; font-weight: 700; margin-bottom: 6px; color: #0f172a; }
    .step-card p { color: var(--muted); font-size: .84rem; }

    .notice-box { padding: 22px 28px; border-radius: var(--radius-lg); background: rgba(59,130,246,.04); border: 1px solid var(--border); margin-bottom: 20px; }
    .notice-box h4 { color: var(--primary); margin-bottom: 8px; font-size: .98rem; }
    .notice-box p { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }
    .notice-box.warn { background: rgba(245,158,11,.04); border-color: rgba(245,158,11,.15); }
    .notice-box.warn h4 { color: #d97706; }

    .footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; padding: 28px 0 0; color: var(--muted); font-size: .85rem; }
    .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
    .footer-links a { color: var(--muted); font-size: .85rem; }
    .footer-links a:hover { color: var(--primary); }

    .float-ad {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
      display: flex; justify-content: center; align-items: center; gap: 14px;
      padding: 10px 20px;
      background: rgba(255,255,255,.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid var(--border); box-shadow: 0 -4px 20px rgba(0,0,0,.05);
    }
    .float-ad .ad-dl-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 8px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .88rem;
      box-shadow: 0 4px 14px rgba(59,130,246,.22);
      transition: all var(--transition); white-space: nowrap;
    }
    .float-ad .ad-dl-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(59,130,246,.32); color: #fff; }
    .float-ad .btn-top {
      padding: 7px 14px; border-radius: 999px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      color: var(--muted); font-size: .8rem; white-space: nowrap;
      transition: all var(--transition);
    }
    .float-ad .btn-top:hover { background: rgba(0,0,0,.08); color: var(--text); }
    .float-ad .btn-close {
      width: 30px; height: 30px; border-radius: 50%; background: rgba(0,0,0,.04);
      color: var(--muted); font-size: .82rem; display: grid; place-items: center;
      transition: all var(--transition);
    }
    .float-ad .btn-close:hover { background: rgba(0,0,0,.1); color: var(--text); }

    .fade-up { opacity: 0; transform: translateY(28px); transition: opacity .6s cubic-bezier(.4,0,.2,1), transform .6s cubic-bezier(.4,0,.2,1); }
    .fade-up.visible { opacity: 1; transform: translateY(0); }
    .hidden { display: none !important; }

    @media (max-width: 1024px) {
      .dl-hero-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .steps { grid-template-columns: repeat(2, minmax(0,1fr)); }
    }
    @media (max-width: 820px) {
      .page { padding: 0 16px 70px; }
      .topbar { padding: 14px 18px; margin-top: 10px; border-radius: var(--radius-lg); }
      .menu-links { display: none; }
      .nav-download-btn { display: none; }
      .mobile-menu-btn { display: inline-flex; }
      .page-hero { padding: 28px 20px; margin-top: 20px; }
      .dl-hero-grid, .steps { grid-template-columns: 1fr; }
      .float-ad { padding: 8px 14px; gap: 10px; }
      .float-ad .ad-dl-btn { padding: 7px 16px; font-size: .82rem; }
    }
    @media (max-width: 520px) {
      .page { padding: 0 10px 60px; }
      .topbar { padding: 12px 14px; border-radius: var(--radius); }
      .brand-logo { width: 38px; height: 38px; border-radius: 10px; font-size: 17px; }
      .brand-info h1 { font-size: 1rem; }
      .page-hero { padding: 22px 16px; border-radius: var(--radius-lg); }
      .page-hero h2 { font-size: 1.4rem; }
      .dl-hero-card { padding: 24px 18px; }
      .float-ad { padding: 8px 10px; gap: 8px; }
      .float-ad .ad-dl-btn { padding: 6px 14px; font-size: .78rem; }
      .float-ad .btn-top { font-size: .75rem; padding: 6px 10px; }
    }
  

    :root {
      --primary: #3b82f6; --primary-dark: #2563eb; --primary-light: #3b82f6;
      --accent: #0284c7; --accent-2: #0ea5e9;
      --bg: #f8fafc; --bg-2: #f1f5f9; --surface: #ffffff; --surface-light: #f8fafc;
      --text: #0f172a; --text-secondary: #334155; --muted: #64748b;
      --border: rgba(0,0,0,0.06); --border-strong: rgba(59,130,246,0.2);
      --radius-sm: 12px; --radius: 18px; --radius-lg: 24px; --radius-xl: 32px;
      --shadow: 0 4px 16px rgba(0,0,0,.06); --shadow-lg: 0 12px 40px rgba(0,0,0,.08);
      --shadow-glow: 0 0 60px rgba(59,130,246,.06);
      --transition: .28s cubic-bezier(.4,0,.2,1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      min-height: 100vh; background: linear-gradient(180deg, #f0f4ff 0%, #f8fafc 30%, #f1f5f9 100%);
      color: var(--text); line-height: 1.72;
      -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
    }
    ::selection { background: rgba(59,130,246,.4); color: #fff; }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    button { appearance: none; border: none; cursor: pointer; font: inherit; }

    .page { max-width: 1200px; margin: 0 auto; padding: 0 24px 130px; }

    .topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 28px; margin-top: 16px; background: rgba(255,255,255,.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid var(--border); border-radius: var(--radius-xl); position: sticky; top: 14px; z-index: 50; box-shadow: 0 4px 16px rgba(0,0,0,.06); }
    .brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
    .brand-logo { width: 44px; height: 44px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #06b6d4); box-shadow: 0 8px 24px rgba(59,130,246,.28); display: grid; place-items: center; color: #fff; font-size: 20px; font-weight: 800; }
    .brand-info { display: flex; flex-direction: column; gap: 2px; }
    .brand-info h1 { font-size: 1.2rem; font-weight: 700; color: #0f172a; }
    .brand-info span { color: var(--muted); font-size: .78rem; }
    .nav-area { display: flex; align-items: center; gap: 16px; }
    .nav-download-btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; border-radius: 999px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .92rem; box-shadow: 0 6px 20px rgba(59,130,246,.3); transition: transform var(--transition), box-shadow var(--transition); white-space: nowrap; }
    .nav-download-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(59,130,246,.42); color: #fff; }
    .menu-links { display: flex; align-items: center; gap: 6px; }
    .menu-links a { color: var(--text-secondary); font-size: .9rem; padding: 8px 14px; border-radius: 10px; transition: all var(--transition); }
    .menu-links a:hover { color: var(--primary); background: rgba(59,130,246,.06); }
    .mobile-menu-btn { display: none; width: 42px; height: 42px; border-radius: 12px; background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08); align-items: center; justify-content: center; color: var(--text); flex-shrink: 0; }
    .mobile-menu-btn .hamburger { width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; }
    .mobile-menu-btn .hamburger::before, .mobile-menu-btn .hamburger::after { content: ""; position: absolute; width: 18px; height: 2px; background: inherit; border-radius: 2px; left: 0; }
    .mobile-menu-btn .hamburger::before { top: -6px; } .mobile-menu-btn .hamburger::after { top: 6px; }

    .overlay { position: fixed; inset: 0; background: rgba(0,0,0,.3); opacity: 0; visibility: hidden; transition: visibility .3s, opacity .3s; z-index: 60; }
    .overlay.show { opacity: 1; visibility: visible; }
    .sidebar { position: fixed; top: 0; right: -340px; width: min(320px, 82vw); height: 100vh; height: 100dvh; padding: 28px 22px; background: #fff; backdrop-filter: blur(20px); box-shadow: -20px 0 60px rgba(0,0,0,.12); transition: right var(--transition); z-index: 70; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; }
    .sidebar.open { right: 0; }
    .sidebar-close { align-self: flex-end; width: 40px; height: 40px; border-radius: 12px; background: rgba(0,0,0,.04); color: var(--text); font-size: 1.1rem; display: grid; place-items: center; margin-bottom: 12px; }
    .sidebar .side-dl-btn { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 18px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .98rem; margin-bottom: 8px; }
    .sidebar nav { display: grid; gap: 4px; }
    .sidebar nav a { color: var(--text-secondary); font-size: .96rem; padding: 13px 16px; border-radius: 12px; transition: all var(--transition); }
    .sidebar nav a:hover { color: var(--primary); background: rgba(59,130,246,.06); }

    .page-hero { margin-top: 28px; padding: 44px 40px; border-radius: var(--radius-xl); background: #fff; border: 1px solid var(--border); box-shadow: 0 12px 40px rgba(0,0,0,.08); text-align: center; position: relative; overflow: hidden; }
    .page-hero::before { content: ""; position: absolute; top: -40%; right: -15%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(59,130,246,.08), transparent 70%); pointer-events: none; }
    .page-hero h2 { font-size: clamp(1.6rem, 2.6vw, 2.3rem); font-weight: 800; margin-bottom: 14px; position: relative; z-index: 1; color: #0f172a; }
    .page-hero p { color: var(--muted); font-size: 1rem; max-width: 700px; margin: 0 auto; position: relative; z-index: 1; }

    .section { margin-top: 32px; padding: 32px 0; border-bottom: 1px solid rgba(0,0,0,.04); }
    .section:last-of-type { border-bottom: none; }

    .faq-item {
      padding: 28px 30px; border-radius: var(--radius-lg);
      background: #fff; border: 1px solid var(--border);
      margin-bottom: 16px; transition: all var(--transition);
    }
    .faq-item:hover { border-color: var(--border-strong); }
    .faq-item h3 { font-size: 1.08rem; font-weight: 700; margin-bottom: 10px; display: flex; align-items: center; gap: 12px; color: #0f172a; }
    .faq-item h3 .q-mark { background: linear-gradient(135deg, #3b82f6, #06b6d4); color: #fff; width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; font-size: .85rem; font-weight: 800; flex-shrink: 0; }
    .faq-item .faq-a { color: var(--text-secondary); font-size: .93rem; line-height: 1.85; }
    .faq-item .faq-a strong { color: var(--text); }

    .faq-categories { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 30px; }
    .faq-cat { padding: 8px 20px; border-radius: 999px; background: rgba(59,130,246,.06); border: 1px solid var(--border); color: var(--text-secondary); font-size: .88rem; transition: all var(--transition); }
    .faq-cat:hover, .faq-cat.active { background: rgba(59,130,246,.12); border-color: var(--border-strong); color: var(--primary); }

    .footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; padding: 28px 0 0; color: var(--muted); font-size: .85rem; }
    .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
    .footer-links a { color: var(--muted); font-size: .85rem; }
    .footer-links a:hover { color: var(--primary-light); }

    .float-ad {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
      display: flex; justify-content: center; align-items: center; gap: 14px;
      padding: 10px 20px;
      background: rgba(255,255,255,.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid var(--border); box-shadow: 0 -4px 20px rgba(0,0,0,.05);
    }
    .float-ad .ad-dl-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 8px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .88rem;
      box-shadow: 0 4px 14px rgba(59,130,246,.22);
      transition: all var(--transition); white-space: nowrap;
    }
    .float-ad .ad-dl-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(59,130,246,.32); color: #fff; }
    .float-ad .btn-top {
      padding: 7px 14px; border-radius: 999px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      color: var(--muted); font-size: .8rem; white-space: nowrap;
      transition: all var(--transition);
    }
    .float-ad .btn-top:hover { background: rgba(0,0,0,.08); color: var(--text); }
    .float-ad .btn-close {
      width: 30px; height: 30px; border-radius: 50%; background: rgba(0,0,0,.04);
      color: var(--muted); font-size: .82rem; display: grid; place-items: center;
      transition: all var(--transition);
    }
    .float-ad .btn-close:hover { background: rgba(0,0,0,.1); color: var(--text); }

    .btn-outline { display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; border-radius: 999px; background: transparent; border: 1.5px solid var(--border-strong); color: var(--text); font-weight: 600; font-size: 1rem; transition: all var(--transition); }
    .btn-outline:hover { border-color: var(--primary-light); background: rgba(59,130,246,.06); }
    .fade-up { opacity: 0; transform: translateY(28px); transition: opacity .6s cubic-bezier(.4,0,.2,1), transform .6s cubic-bezier(.4,0,.2,1); }
    .fade-up.visible { opacity: 1; transform: translateY(0); }
    .hidden { display: none !important; }

    @media (max-width: 820px) {
      .page { padding: 0 16px 120px; }
      .topbar { padding: 14px 18px; margin-top: 10px; border-radius: var(--radius-lg); }
      .menu-links { display: none; } .nav-download-btn { display: none; }
      .mobile-menu-btn { display: inline-flex; }
      .page-hero { padding: 28px 20px; margin-top: 20px; }
      .faq-item { padding: 20px 18px; }
      .float-ad { padding: 8px 14px; gap: 10px; }
      .float-ad .ad-dl-btn { padding: 7px 16px; }
    }
    @media (max-width: 520px) {
      .page { padding: 0 10px 110px; }
      .topbar { padding: 12px 14px; border-radius: var(--radius); }
      .brand-logo { width: 38px; height: 38px; border-radius: 10px; font-size: 17px; }
      .brand-info h1 { font-size: 1rem; }
      .page-hero { padding: 22px 16px; border-radius: var(--radius-lg); }
      .page-hero h2 { font-size: 1.4rem; }
      .float-ad { padding: 8px 10px; gap: 8px; }
    }
  

    :root {
      --primary: #3b82f6; --primary-dark: #2563eb; --primary-light: #60a5fa;
      --accent: #06b6d4; --accent-2: #0ea5e9;
      --bg: #f8fafc; --bg-2: #f1f5f9; --surface: #ffffff; --surface-light: #f8fafc;
      --text: #0f172a; --text-secondary: #334155; --muted: #64748b;
      --border: rgba(0,0,0,0.06); --border-strong: rgba(59,130,246,0.2);
      --radius-sm: 12px; --radius: 18px; --radius-lg: 24px; --radius-xl: 32px;
      --shadow-sm: 0 2px 8px rgba(0,0,0,.06); --shadow: 0 8px 24px rgba(0,0,0,.08);
      --shadow-lg: 0 20px 50px rgba(0,0,0,.08); --shadow-glow: 0 0 40px rgba(59,130,246,.08);
      --transition: .28s cubic-bezier(.4,0,.2,1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      min-height: 100vh; background: linear-gradient(180deg, #f0f4ff 0%, #f8fafc 30%, #f1f5f9 100%); color: var(--text); line-height: 1.72;
      -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
    }
    ::selection { background: rgba(59,130,246,.2); color: var(--text); }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--primary-dark); }
    button { appearance: none; border: none; cursor: pointer; font: inherit; }

    .page { max-width: 1200px; margin: 0 auto; padding: 0 24px 130px; }

    .topbar {
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
      padding: 18px 28px; margin-top: 16px;
      background: rgba(255,255,255,.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border); border-radius: var(--radius-xl);
      position: sticky; top: 14px; z-index: 50; box-shadow: 0 4px 16px rgba(0,0,0,.06);
    }
    .brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
    .brand-logo {
      width: 44px; height: 44px; border-radius: 14px;
      background: linear-gradient(135deg, #3b82f6, #06b6d4);
      box-shadow: 0 8px 24px rgba(59,130,246,.28);
      display: grid; place-items: center; color: #fff; font-size: 20px; font-weight: 800;
    }
    .brand-info { display: flex; flex-direction: column; gap: 2px; }
    .brand-info h1 { font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; line-height: 1.2; color: #0f172a; }
    .brand-info span { color: var(--muted); font-size: .78rem; }
    .nav-area { display: flex; align-items: center; gap: 16px; }
    .nav-download-btn {
      display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .92rem;
      box-shadow: 0 6px 20px rgba(59,130,246,.3); transition: transform var(--transition), box-shadow var(--transition); white-space: nowrap;
    }
    .nav-download-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(59,130,246,.42); color: #fff; }
    .menu-links { display: flex; align-items: center; gap: 6px; }
    .menu-links a { color: var(--text-secondary); font-size: .9rem; padding: 8px 14px; border-radius: 10px; transition: all var(--transition); }
    .menu-links a:hover, .menu-links a:focus { color: var(--primary); background: rgba(59,130,246,.06); }
    .mobile-menu-btn {
      display: none; width: 42px; height: 42px; border-radius: 12px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      align-items: center; justify-content: center; color: var(--text); flex-shrink: 0;
    }
    .mobile-menu-btn .hamburger { width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; }
    .mobile-menu-btn .hamburger::before, .mobile-menu-btn .hamburger::after { content: ""; position: absolute; width: 18px; height: 2px; background: inherit; border-radius: 2px; left: 0; }
    .mobile-menu-btn .hamburger::before { top: -6px; }
    .mobile-menu-btn .hamburger::after { top: 6px; }

    .overlay { position: fixed; inset: 0; background: rgba(0,0,0,.3); opacity: 0; visibility: hidden; transition: visibility .3s, opacity .3s; z-index: 60; }
    .overlay.show { opacity: 1; visibility: visible; }
    .sidebar {
      position: fixed; top: 0; right: -340px; width: min(320px, 82vw); height: 100vh; height: 100dvh;
      padding: 28px 22px; background: #fff; backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
      box-shadow: -20px 0 60px rgba(0,0,0,.12); transition: right var(--transition); z-index: 70;
      display: flex; flex-direction: column; gap: 8px; overflow-y: auto;
    }
    .sidebar.open { right: 0; }
    .sidebar-close { align-self: flex-end; width: 40px; height: 40px; border-radius: 12px; background: rgba(0,0,0,.04); color: var(--text); font-size: 1.1rem; display: grid; place-items: center; margin-bottom: 12px; }
    .sidebar .side-dl-btn {
      display: flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 18px; border-radius: 14px;
      background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .98rem; margin-bottom: 8px; box-shadow: 0 6px 20px rgba(59,130,246,.28);
    }
    .sidebar nav { display: grid; gap: 4px; }
    .sidebar nav a { color: var(--text-secondary); font-size: .96rem; padding: 13px 16px; border-radius: 12px; transition: all var(--transition); }
    .sidebar nav a:hover, .sidebar nav a:focus { color: var(--primary); background: rgba(59,130,246,.06); }

    .page-hero {
      margin-top: 28px; padding: 44px 40px; border-radius: var(--radius-xl);
      background: #fff; border: 1px solid var(--border); box-shadow: 0 12px 40px rgba(0,0,0,.08);
      text-align: center; position: relative; overflow: hidden;
    }
    .page-hero::before {
      content: ""; position: absolute; top: -40%; right: -15%; width: 400px; height: 400px;
      background: radial-gradient(circle, rgba(59,130,246,.06), transparent 70%); pointer-events: none;
    }
    .page-hero h2 {
      font-size: clamp(1.6rem, 2.6vw, 2.3rem); font-weight: 800; letter-spacing: -.02em; margin-bottom: 14px; position: relative; z-index: 1;
      color: #0f172a;
    }
    .page-hero p { color: var(--muted); font-size: 1rem; max-width: 700px; margin: 0 auto; position: relative; z-index: 1; }

    .section { margin-top: 32px; padding: 32px 0; border-bottom: 1px solid rgba(0,0,0,.04); }
    .section:last-of-type { border-bottom: none; }
    .section-header { text-align: center; margin-bottom: 36px; }
    .section-header h2 { font-size: clamp(1.4rem, 2.1vw, 1.8rem); font-weight: 800; margin-bottom: 10px; color: #0f172a; }
    .section-header h2 span { background: linear-gradient(135deg, #2563eb, #06b6d4); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .section-header p { color: var(--muted); font-size: .95rem; max-width: 600px; margin: 0 auto; }

    .cards-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 24px; }
    .card {
      padding: 32px 28px; border-radius: var(--radius-lg);
      background: #fff; border: 1px solid var(--border);
      transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }
    .card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
    .card-icon { width: 56px; height: 56px; border-radius: 16px; margin-bottom: 18px; display: grid; place-items: center; font-size: 28px; background: rgba(59,130,246,.08); color: var(--primary); }
    .card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; color: #0f172a; }
    .card p { color: var(--muted); font-size: .92rem; line-height: 1.75; }
    .card ul { list-style: none; margin-top: 14px; display: grid; gap: 8px; }
    .card ul li { color: var(--text-secondary); font-size: .9rem; display: flex; align-items: flex-start; gap: 10px; }
    .card ul li::before { content: "✓"; color: var(--primary); font-weight: 700; flex-shrink: 0; }

    .feature-detail {
      padding: 36px 32px; border-radius: var(--radius-xl);
      background: #fff; border: 1px solid var(--border);
      margin-bottom: 24px; transition: all var(--transition);
    }
    .feature-detail:hover { border-color: var(--border-strong); }
    .feature-detail .fd-header { display: flex; gap: 20px; align-items: flex-start; margin-bottom: 20px; }
    .feature-detail .fd-icon { width: 60px; height: 60px; border-radius: 18px; flex-shrink: 0; display: grid; place-items: center; font-size: 30px; background: linear-gradient(135deg, rgba(59,130,246,.12), rgba(6,182,212,.08)); color: var(--primary); }
    .feature-detail h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 6px; color: #0f172a; }
    .feature-detail .fd-subtitle { color: var(--muted); font-size: .9rem; }
    .feature-detail .fd-body { color: var(--text-secondary); font-size: .95rem; line-height: 1.85; }
    .feature-detail .fd-body strong { color: var(--text); }

    .comparison-table { width: 100%; border-collapse: collapse; margin-top: 20px; font-size: .9rem; border-radius: var(--radius); overflow: hidden; }
    .comparison-table th { background: rgba(59,130,246,.06); padding: 14px 18px; text-align: left; font-weight: 700; color: #0f172a; border-bottom: 2px solid rgba(0,0,0,.06); }
    .comparison-table td { padding: 12px 18px; border-bottom: 1px solid rgba(0,0,0,.04); color: var(--text-secondary); }
    .comparison-table tr:last-child td { border-bottom: none; }
    .comparison-table .highlight { color: var(--primary); font-weight: 700; }

    .footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; padding: 28px 0 0; color: var(--muted); font-size: .85rem; }
    .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
    .footer-links a { color: var(--muted); font-size: .85rem; }
    .footer-links a:hover { color: var(--primary); }

    .float-ad {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
      display: flex; justify-content: center; align-items: center; gap: 14px;
      padding: 10px 20px;
      background: rgba(255,255,255,.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid var(--border); box-shadow: 0 -4px 20px rgba(0,0,0,.05);
    }
    .float-ad .ad-dl-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 8px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .88rem;
      box-shadow: 0 4px 14px rgba(59,130,246,.22);
      transition: all var(--transition); white-space: nowrap;
    }
    .float-ad .ad-dl-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(59,130,246,.32); color: #fff; }
    .float-ad .btn-top {
      padding: 7px 14px; border-radius: 999px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      color: var(--muted); font-size: .8rem; white-space: nowrap;
      transition: all var(--transition);
    }
    .float-ad .btn-top:hover { background: rgba(0,0,0,.08); color: var(--text); }
    .float-ad .btn-close {
      width: 30px; height: 30px; border-radius: 50%; background: rgba(0,0,0,.04);
      color: var(--muted); font-size: .82rem; display: grid; place-items: center;
      transition: all var(--transition);
    }
    .float-ad .btn-close:hover { background: rgba(0,0,0,.1); color: var(--text); }

    .btn-outline {
      display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; border-radius: 999px;
      background: transparent; border: 1.5px solid var(--border-strong); color: var(--text); font-weight: 600; font-size: 1rem; transition: all var(--transition);
    }
    .btn-outline:hover { border-color: var(--primary); background: rgba(59,130,246,.06); }
    .fade-up { opacity: 0; transform: translateY(28px); transition: opacity .6s cubic-bezier(.4,0,.2,1), transform .6s cubic-bezier(.4,0,.2,1); }
    .fade-up.visible { opacity: 1; transform: translateY(0); }
    .hidden { display: none !important; }

    @media (max-width: 1024px) {
      .cards-2 { grid-template-columns: 1fr; }
    }
    @media (max-width: 820px) {
      .page { padding: 0 16px 120px; }
      .topbar { padding: 14px 18px; margin-top: 10px; border-radius: var(--radius-lg); }
      .menu-links { display: none; }
      .nav-download-btn { display: none; }
      .mobile-menu-btn { display: inline-flex; }
      .page-hero { padding: 32px 22px; margin-top: 20px; }
      .feature-detail .fd-header { flex-direction: column; }
      .float-ad { padding: 10px 16px; gap: 10px; }
      .comparison-table { font-size: .78rem; }
      .comparison-table th, .comparison-table td { padding: 10px 12px; }
    }
    @media (max-width: 520px) {
      .page { padding: 0 10px 110px; }
      .topbar { padding: 12px 14px; border-radius: var(--radius); }
      .brand-logo { width: 38px; height: 38px; border-radius: 10px; font-size: 17px; }
      .brand-info h1 { font-size: 1rem; }
      .page-hero { padding: 24px 16px; border-radius: var(--radius-lg); }
      .page-hero h2 { font-size: 1.4rem; }
      .feature-detail { padding: 22px 18px; }
      .float-ad { flex-direction: column; align-items: stretch; }
    }
  

    :root {
      --primary: #3b82f6; --primary-dark: #2563eb; --primary-light: #3b82f6;
      --accent: #0284c7; --accent-2: #0ea5e9;
      --bg: #f8fafc; --bg-2: #f1f5f9; --surface: #ffffff; --surface-light: #f8fafc;
      --text: #0f172a; --text-secondary: #334155; --muted: #64748b;
      --border: rgba(0,0,0,0.06); --border-strong: rgba(59,130,246,0.2);
      --radius-sm: 12px; --radius: 18px; --radius-lg: 24px; --radius-xl: 32px;
      --shadow: 0 4px 16px rgba(0,0,0,.06); --shadow-lg: 0 12px 40px rgba(0,0,0,.08);
      --shadow-glow: 0 0 60px rgba(59,130,246,.06);
      --transition: .28s cubic-bezier(.4,0,.2,1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      min-height: 100vh; background: linear-gradient(180deg, #f0f4ff 0%, #f8fafc 30%, #f1f5f9 100%);
      color: var(--text); line-height: 1.72;
      -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
    }
    ::selection { background: rgba(59,130,246,.4); color: #fff; }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    button { appearance: none; border: none; cursor: pointer; font: inherit; }

    .page { max-width: 1200px; margin: 0 auto; padding: 0 24px 130px; }

    .topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 18px 28px; margin-top: 16px; background: rgba(255,255,255,.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid var(--border); border-radius: var(--radius-xl); position: sticky; top: 14px; z-index: 50; box-shadow: 0 4px 16px rgba(0,0,0,.06); }
    .brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
    .brand-logo { width: 44px; height: 44px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #06b6d4); box-shadow: 0 8px 24px rgba(59,130,246,.28); display: grid; place-items: center; color: #fff; font-size: 20px; font-weight: 800; }
    .brand-info { display: flex; flex-direction: column; gap: 2px; }
    .brand-info h1 { font-size: 1.2rem; font-weight: 700; color: #0f172a; }
    .brand-info span { color: var(--muted); font-size: .78rem; }
    .nav-area { display: flex; align-items: center; gap: 16px; }
    .nav-download-btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; border-radius: 999px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .92rem; box-shadow: 0 6px 20px rgba(59,130,246,.3); transition: transform var(--transition), box-shadow var(--transition); white-space: nowrap; }
    .nav-download-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(59,130,246,.42); color: #fff; }
    .menu-links { display: flex; align-items: center; gap: 6px; }
    .menu-links a { color: var(--text-secondary); font-size: .9rem; padding: 8px 14px; border-radius: 10px; transition: all var(--transition); }
    .menu-links a:hover { color: var(--primary); background: rgba(59,130,246,.06); }
    .mobile-menu-btn { display: none; width: 42px; height: 42px; border-radius: 12px; background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08); align-items: center; justify-content: center; color: var(--text); flex-shrink: 0; }
    .mobile-menu-btn .hamburger { width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; }
    .mobile-menu-btn .hamburger::before, .mobile-menu-btn .hamburger::after { content: ""; position: absolute; width: 18px; height: 2px; background: inherit; border-radius: 2px; left: 0; }
    .mobile-menu-btn .hamburger::before { top: -6px; } .mobile-menu-btn .hamburger::after { top: 6px; }

    .overlay { position: fixed; inset: 0; background: rgba(0,0,0,.3); opacity: 0; visibility: hidden; transition: visibility .3s, opacity .3s; z-index: 60; }
    .overlay.show { opacity: 1; visibility: visible; }
    .sidebar { position: fixed; top: 0; right: -340px; width: min(320px, 82vw); height: 100vh; height: 100dvh; padding: 28px 22px; background: #fff; backdrop-filter: blur(20px); box-shadow: -20px 0 60px rgba(0,0,0,.12); transition: right var(--transition); z-index: 70; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; }
    .sidebar.open { right: 0; }
    .sidebar-close { align-self: flex-end; width: 40px; height: 40px; border-radius: 12px; background: rgba(0,0,0,.04); color: var(--text); font-size: 1.1rem; display: grid; place-items: center; margin-bottom: 12px; }
    .sidebar .side-dl-btn { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 18px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .98rem; margin-bottom: 8px; }
    .sidebar nav { display: grid; gap: 4px; }
    .sidebar nav a { color: var(--text-secondary); font-size: .96rem; padding: 13px 16px; border-radius: 12px; transition: all var(--transition); }
    .sidebar nav a:hover { color: var(--primary); background: rgba(59,130,246,.06); }

    .page-hero { margin-top: 28px; padding: 44px 40px; border-radius: var(--radius-xl); background: #fff; border: 1px solid var(--border); box-shadow: 0 12px 40px rgba(0,0,0,.08); text-align: center; position: relative; overflow: hidden; }
    .page-hero::before { content: ""; position: absolute; top: -40%; right: -15%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(59,130,246,.08), transparent 70%); pointer-events: none; }
    .page-hero h2 { font-size: clamp(1.6rem, 2.6vw, 2.3rem); font-weight: 800; margin-bottom: 14px; position: relative; z-index: 1; color: #0f172a; }
    .page-hero p { color: var(--muted); font-size: 1rem; max-width: 700px; margin: 0 auto; position: relative; z-index: 1; }

    .section { margin-top: 32px; padding: 32px 0; border-bottom: 1px solid rgba(0,0,0,.04); }
    .section:last-of-type { border-bottom: none; }
    .section-header { text-align: center; margin-bottom: 36px; }
    .section-header h2 { font-size: clamp(1.4rem, 2.1vw, 1.8rem); font-weight: 800; margin-bottom: 10px; color: #0f172a; }
    .section-header h2 span { color: var(--primary); }
    .section-header p { color: var(--muted); font-size: .95rem; max-width: 600px; margin: 0 auto; }

    .cards-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 20px; }
    .card { padding: 28px 26px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); transition: all var(--transition); }
    .card:hover { transform: translateY(-4px); border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
    .card-icon { width: 48px; height: 48px; border-radius: 14px; margin-bottom: 16px; display: grid; place-items: center; font-size: 22px; background: rgba(59,130,246,.12); color: var(--primary-light); }
    .card h3 { font-size: 1.08rem; font-weight: 700; margin-bottom: 10px; color: #0f172a; }
    .card p, .card li { color: var(--muted); font-size: .9rem; line-height: 1.7; }
    .card ul { list-style: none; margin-top: 8px; display: grid; gap: 6px; }
    .card ul li { display: flex; align-items: center; gap: 8px; }
    .card ul li::before { content: "•"; color: var(--primary-light); }

    .spec-table { width: 100%; border-collapse: collapse; font-size: .9rem; border-radius: var(--radius); overflow: hidden; }
    .spec-table thead th { background: rgba(59,130,246,.06); padding: 14px 18px; text-align: left; font-weight: 700; color: #0f172a; }
    .spec-table tbody td { padding: 12px 18px; border-bottom: 1px solid var(--border); color: var(--text-secondary); }
    .spec-table tbody tr:last-child td { border-bottom: none; }
    .spec-table .yes { color: #16a34a; font-weight: 600; }
    .spec-table .partial { color: #d97706; font-weight: 600; }

    .footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; padding: 28px 0 0; color: var(--muted); font-size: .85rem; }
    .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
    .footer-links a { color: var(--muted); font-size: .85rem; }
    .footer-links a:hover { color: var(--primary-light); }

    .float-ad {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
      display: flex; justify-content: center; align-items: center; gap: 14px;
      padding: 10px 20px;
      background: rgba(255,255,255,.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid var(--border); box-shadow: 0 -4px 20px rgba(0,0,0,.05);
    }
    .float-ad .ad-dl-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 8px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .88rem;
      box-shadow: 0 4px 14px rgba(59,130,246,.22);
      transition: all var(--transition); white-space: nowrap;
    }
    .float-ad .ad-dl-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(59,130,246,.32); color: #fff; }
    .float-ad .btn-top {
      padding: 7px 14px; border-radius: 999px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      color: var(--muted); font-size: .8rem; white-space: nowrap;
      transition: all var(--transition);
    }
    .float-ad .btn-top:hover { background: rgba(0,0,0,.08); color: var(--text); }
    .float-ad .btn-close {
      width: 30px; height: 30px; border-radius: 50%; background: rgba(0,0,0,.04);
      color: var(--muted); font-size: .82rem; display: grid; place-items: center;
      transition: all var(--transition);
    }
    .float-ad .btn-close:hover { background: rgba(0,0,0,.1); color: var(--text); }

    .btn-outline { display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; border-radius: 999px; background: transparent; border: 1.5px solid var(--border-strong); color: var(--text); font-weight: 600; font-size: 1rem; transition: all var(--transition); }
    .btn-outline:hover { border-color: var(--primary-light); background: rgba(59,130,246,.06); }
    .fade-up { opacity: 0; transform: translateY(28px); transition: opacity .6s cubic-bezier(.4,0,.2,1), transform .6s cubic-bezier(.4,0,.2,1); }
    .fade-up.visible { opacity: 1; transform: translateY(0); }
    .hidden { display: none !important; }

    @media (max-width: 1024px) { .cards-3 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
    @media (max-width: 820px) {
      .page { padding: 0 16px 120px; }
      .topbar { padding: 14px 18px; margin-top: 10px; border-radius: var(--radius-lg); }
      .menu-links { display: none; } .nav-download-btn { display: none; }
      .mobile-menu-btn { display: inline-flex; }
      .page-hero { padding: 28px 20px; margin-top: 20px; }
      .cards-3 { grid-template-columns: 1fr; }
      .spec-table { font-size: .78rem; }
      .spec-table thead th, .spec-table tbody td { padding: 10px 12px; }
      .float-ad { padding: 8px 14px; gap: 10px; }
      .float-ad .ad-dl-btn { padding: 7px 16px; }
    }
    @media (max-width: 520px) {
      .page { padding: 0 10px 110px; }
      .topbar { padding: 12px 14px; border-radius: var(--radius); }
      .brand-logo { width: 38px; height: 38px; border-radius: 10px; font-size: 17px; }
      .brand-info h1 { font-size: 1rem; }
      .page-hero { padding: 22px 16px; border-radius: var(--radius-lg); }
      .page-hero h2 { font-size: 1.4rem; }
      .float-ad { padding: 8px 10px; gap: 8px; }
    }
  

    :root {
      --primary: #3b82f6; --primary-dark: #2563eb; --primary-light: #60a5fa;
      --accent: #06b6d4; --accent-2: #0ea5e9;
      --bg: #f8fafc; --bg-2: #f1f5f9; --surface: #ffffff; --surface-light: #f8fafc;
      --text: #0f172a; --text-secondary: #334155; --muted: #64748b;
      --border: rgba(0,0,0,0.06); --border-strong: rgba(59,130,246,0.2);
      --radius-sm: 12px; --radius: 18px; --radius-lg: 24px; --radius-xl: 32px;
      --shadow: 0 8px 32px rgba(0,0,0,.08); --shadow-lg: 0 20px 60px rgba(0,0,0,.1);
      --shadow-glow: 0 0 40px rgba(59,130,246,.08);
      --transition: .28s cubic-bezier(.4,0,.2,1);
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      min-height: 100vh; background: linear-gradient(180deg, #f0f4ff 0%, #f8fafc 30%, #f1f5f9 100%); color: var(--text); line-height: 1.72;
      -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
    }
    ::selection { background: rgba(59,130,246,.25); color: #0f172a; }
    a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--accent); }
    button { appearance: none; border: none; cursor: pointer; font: inherit; }

    .page { max-width: 1200px; margin: 0 auto; padding: 0 24px 130px; }

    .topbar {
      display: flex; align-items: center; justify-content: space-between; gap: 20px;
      padding: 18px 28px; margin-top: 16px;
      background: rgba(255,255,255,.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border); border-radius: var(--radius-xl);
      position: sticky; top: 14px; z-index: 50; box-shadow: 0 4px 16px rgba(0,0,0,.06);
    }
    .brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
    .brand-logo { width: 44px; height: 44px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #06b6d4); box-shadow: 0 8px 24px rgba(59,130,246,.28); display: grid; place-items: center; color: #fff; font-size: 20px; font-weight: 800; }
    .brand-info { display: flex; flex-direction: column; gap: 2px; }
    .brand-info h1 { font-size: 1.2rem; font-weight: 700; }
    .brand-info span { color: var(--muted); font-size: .78rem; }
    .nav-area { display: flex; align-items: center; gap: 16px; }
    .nav-download-btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 22px; border-radius: 999px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .92rem; box-shadow: 0 6px 20px rgba(59,130,246,.3); transition: transform var(--transition), box-shadow var(--transition); white-space: nowrap; }
    .nav-download-btn:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(59,130,246,.42); color: #fff; }
    .menu-links { display: flex; align-items: center; gap: 6px; }
    .menu-links a { color: var(--text-secondary); font-size: .9rem; padding: 8px 14px; border-radius: 10px; transition: all var(--transition); }
    .menu-links a:hover { color: var(--primary); background: rgba(59,130,246,.06); }
    .mobile-menu-btn { display: none; width: 42px; height: 42px; border-radius: 12px; background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08); align-items: center; justify-content: center; color: var(--text); flex-shrink: 0; }
    .mobile-menu-btn .hamburger { width: 18px; height: 2px; background: currentColor; border-radius: 2px; position: relative; }
    .mobile-menu-btn .hamburger::before, .mobile-menu-btn .hamburger::after { content: ""; position: absolute; width: 18px; height: 2px; background: inherit; border-radius: 2px; left: 0; }
    .mobile-menu-btn .hamburger::before { top: -6px; } .mobile-menu-btn .hamburger::after { top: 6px; }

    .overlay { position: fixed; inset: 0; background: rgba(0,0,0,.3); opacity: 0; visibility: hidden; transition: visibility .3s, opacity .3s; z-index: 60; }
    .overlay.show { opacity: 1; visibility: visible; }
    .sidebar { position: fixed; top: 0; right: -340px; width: min(320px, 82vw); height: 100vh; height: 100dvh; padding: 28px 22px; background: #fff; backdrop-filter: blur(20px); box-shadow: -20px 0 60px rgba(0,0,0,.12); transition: right var(--transition); z-index: 70; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; }
    .sidebar.open { right: 0; }
    .sidebar-close { align-self: flex-end; width: 40px; height: 40px; border-radius: 12px; background: rgba(0,0,0,.04); color: var(--text); font-size: 1.1rem; display: grid; place-items: center; margin-bottom: 12px; }
    .sidebar .side-dl-btn { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 18px; border-radius: 14px; background: linear-gradient(135deg, #3b82f6, #2563eb); color: #fff; font-weight: 700; font-size: .98rem; margin-bottom: 8px; }
    .sidebar nav { display: grid; gap: 4px; }
    .sidebar nav a { color: var(--text-secondary); font-size: .96rem; padding: 13px 16px; border-radius: 12px; transition: all var(--transition); }
    .sidebar nav a:hover { color: var(--primary); background: rgba(59,130,246,.06); }

    .page-hero {
      margin-top: 28px; padding: 44px 40px; border-radius: var(--radius-xl);
      background: #fff;
      border: 1px solid var(--border); box-shadow: 0 12px 40px rgba(0,0,0,.08);
      text-align: center; position: relative; overflow: hidden;
    }
    .page-hero::before { content: ""; position: absolute; top: -40%; right: -15%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(59,130,246,.06), transparent 70%); pointer-events: none; }
    .page-hero h2 { font-size: clamp(1.6rem, 2.6vw, 2.3rem); font-weight: 800; margin-bottom: 14px; position: relative; z-index: 1; background: linear-gradient(135deg, #0f172a 0%, #3b82f6 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .page-hero p { color: var(--muted); font-size: 1rem; max-width: 700px; margin: 0 auto; position: relative; z-index: 1; }

    .section { margin-top: 32px; padding: 32px 0; border-bottom: 1px solid rgba(0,0,0,.04); }
    .section:last-of-type { border-bottom: none; }

    .scene-detail {
      padding: 36px 32px; border-radius: var(--radius-xl);
      background: #fff; border: 1px solid var(--border);
      margin-bottom: 24px; transition: all var(--transition);
      display: grid; grid-template-columns: auto 1fr; gap: 24px;
    }
    .scene-detail:hover { border-color: var(--border-strong); transform: translateY(-2px); }
    .scene-detail .sd-icon { width: 72px; height: 72px; border-radius: 20px; display: grid; place-items: center; font-size: 36px; background: linear-gradient(135deg, rgba(59,130,246,.12), rgba(6,182,212,.08)); flex-shrink: 0; }
    .scene-detail h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 8px; color: #0f172a; }
    .scene-detail .sd-subtitle { color: var(--muted); font-size: .88rem; margin-bottom: 12px; }
    .scene-detail .sd-body { color: var(--text-secondary); font-size: .93rem; line-height: 1.85; }
    .scene-detail .sd-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
    .scene-detail .sd-tags span { padding: 5px 14px; border-radius: 999px; background: rgba(59,130,246,.06); color: var(--primary); font-size: .8rem; border: 1px solid var(--border); }

    .footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; padding: 28px 0 0; color: var(--muted); font-size: .85rem; }
    .footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
    .footer-links a { color: var(--muted); font-size: .85rem; }
    .footer-links a:hover { color: var(--primary); }

    .float-ad {
      position: fixed; left: 0; right: 0; bottom: 0; z-index: 80;
      display: flex; justify-content: center; align-items: center; gap: 14px;
      padding: 10px 20px;
      background: rgba(255,255,255,.94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid var(--border); box-shadow: 0 -4px 20px rgba(0,0,0,.05);
    }
    .float-ad .ad-dl-btn {
      display: inline-flex; align-items: center; gap: 6px;
      padding: 8px 22px; border-radius: 999px;
      background: linear-gradient(135deg, #3b82f6, #2563eb);
      color: #fff; font-weight: 700; font-size: .88rem;
      box-shadow: 0 4px 14px rgba(59,130,246,.22);
      transition: all var(--transition); white-space: nowrap;
    }
    .float-ad .ad-dl-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(59,130,246,.32); color: #fff; }
    .float-ad .btn-top {
      padding: 7px 14px; border-radius: 999px;
      background: rgba(0,0,0,.04); border: 1px solid rgba(0,0,0,.08);
      color: var(--muted); font-size: .8rem; white-space: nowrap;
      transition: all var(--transition);
    }
    .float-ad .btn-top:hover { background: rgba(0,0,0,.08); color: var(--text); }
    .float-ad .btn-close {
      width: 30px; height: 30px; border-radius: 50%; background: rgba(0,0,0,.04);
      color: var(--muted); font-size: .82rem; display: grid; place-items: center;
      transition: all var(--transition);
    }
    .float-ad .btn-close:hover { background: rgba(0,0,0,.1); color: #fff; }

    .btn-outline { display: inline-flex; align-items: center; gap: 10px; padding: 15px 30px; border-radius: 999px; background: transparent; border: 1.5px solid var(--border-strong); color: var(--text); font-weight: 600; font-size: 1rem; transition: all var(--transition); }
    .btn-outline:hover { border-color: var(--primary-light); background: rgba(59,130,246,.06); }
    .fade-up { opacity: 0; transform: translateY(28px); transition: opacity .6s cubic-bezier(.4,0,.2,1), transform .6s cubic-bezier(.4,0,.2,1); }
    .fade-up.visible { opacity: 1; transform: translateY(0); }
    .hidden { display: none !important; }

    @media (max-width: 820px) {
      .page { padding: 0 16px 120px; }
      .topbar { padding: 14px 18px; margin-top: 10px; border-radius: var(--radius-lg); }
      .menu-links { display: none; } .nav-download-btn { display: none; }
      .mobile-menu-btn { display: inline-flex; }
      .page-hero { padding: 28px 20px; margin-top: 20px; }
      .scene-detail { grid-template-columns: 1fr; padding: 24px 20px; }
      .scene-detail .sd-icon { width: 56px; height: 56px; font-size: 28px; border-radius: 16px; }
      .float-ad { padding: 8px 14px; gap: 10px; }
    }
    @media (max-width: 520px) {
      .page { padding: 0 10px 110px; }
      .topbar { padding: 12px 14px; border-radius: var(--radius); }
      .brand-logo { width: 38px; height: 38px; border-radius: 10px; font-size: 17px; }
      .brand-info h1 { font-size: 1rem; }
      .page-hero { padding: 22px 16px; border-radius: var(--radius-lg); }
      .page-hero h2 { font-size: 1.4rem; }
      .float-ad { padding: 8px 10px; gap: 8px; }
    }
  

/* ============================================================
   ARTICLE BODY — 文章内容排版样式
   ============================================================ */
.post-body {
  color: #1e293b;
  word-break: break-word;
}
.post-body p {
  margin: 0 0 1.2em;
  line-height: 1.9;
}
.post-body h1, .post-body h2, .post-body h3, .post-body h4, .post-body h5, .post-body h6 {
  margin: 2em 0 .6em;
  font-weight: 700;
  line-height: 1.35;
  color: #0f172a;
}
.post-body h1 { font-size: 1.8em; border-bottom: 2px solid #e2e8f0; padding-bottom: .3em; }
.post-body h2 { font-size: 1.5em; border-bottom: 1px solid #e2e8f0; padding-bottom: .25em; }
.post-body h3 { font-size: 1.25em; }
.post-body h4 { font-size: 1.1em; }
.post-body ul, .post-body ol {
  margin: 0 0 1.2em;
  padding-left: 1.8em;
}
.post-body li {
  margin-bottom: .4em;
  line-height: 1.8;
}
.post-body blockquote {
  margin: 1.2em 0;
  padding: 16px 20px;
  border-left: 4px solid #3b82f6;
  background: #f0f4ff;
  border-radius: 0 8px 8px 0;
  color: #334155;
}
.post-body blockquote p { margin-bottom: .5em; }
.post-body a {
  color: #3b82f6;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.post-body a:hover { color: #1d4ed8; }
.post-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1em 0;
}
.post-body figure {
  margin: 1.2em 0;
  text-align: center;
}
.post-body figcaption {
  font-size: .88em;
  color: #64748b;
  margin-top: .5em;
}
.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.2em 0;
  font-size: .94em;
  display: block;
  overflow-x: auto;
}
.post-body th, .post-body td {
  padding: 10px 14px;
  border: 1px solid #e2e8f0;
  text-align: left;
}
.post-body th {
  background: #f1f5f9;
  font-weight: 600;
  color: #0f172a;
}
.post-body tbody tr:nth-child(even) { background: #f8fafc; }
.post-body pre {
  margin: 1.2em 0;
  padding: 16px 20px;
  background: #1e293b;
  color: #e2e8f0;
  border-radius: 8px;
  overflow-x: auto;
  font-size: .88em;
  line-height: 1.65;
}
.post-body code {
  font-family: "SF Mono","Fira Code","Consolas","Monaco",monospace;
  font-size: .9em;
  padding: 2px 6px;
  border-radius: 4px;
  background: #f1f5f9;
  color: #be185d;
}
.post-body pre code {
  background: none;
  color: inherit;
  padding: 0;
}
.post-body hr {
  border: none;
  border-top: 1px solid #e2e8f0;
  margin: 2em 0;
}
.post-body strong { font-weight: 600; color: #0f172a; }
.post-body em { font-style: italic; }
.post-body del { text-decoration: line-through; color: #94a3b8; }
@media (max-width: 768px) {
  .post-body { font-size: .95em; }
  .post-body h1 { font-size: 1.4em; }
  .post-body h2 { font-size: 1.25em; }
  .post-body table { font-size: .82em; }
  .post-body th, .post-body td { padding: 6px 8px; }
}