:root {
      --bg: #020617;
      --bg-elevated: #0f172a;
      --text: #f0f9ff;
      --text-muted: #94a3b8;
      --accent-cyan: #0ea5e9;
      --accent-blue: #3b82f6;
      --accent-purple: #8b5cf6;
      --border: rgba(14, 165, 233, 0.08);
    }

    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      background: var(--bg); color: var(--text); line-height: 1.6;
    }

    .top-nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
      display: flex; align-items: center; justify-content: space-between;
      padding: 0 48px; height: 68px;
      background: rgba(15, 23, 42, 0.92);
      backdrop-filter: blur(20px) saturate(1.4);
      border-bottom: 1px solid var(--border);
    }
    .nav-brand {
      display: flex; align-items: center; gap: 12px;
      font-size: 20px; font-weight: 800; letter-spacing: 2px;
      text-decoration: none;
      color: #f0f9ff;
      filter: drop-shadow(0 0 3px rgba(255, 255, 255, 0.1));
    }
    .nav-logo {
      width: 36px; height: 36px; flex-shrink: 0;
      animation: logoPulse 4s ease-in-out infinite;
      transition: transform .35s ease;
    }
    @keyframes logoPulse {
      0%, 100% { filter: drop-shadow(0 0 4px rgba(0, 242, 255, 0.25)); }
      50% { filter: drop-shadow(0 0 10px rgba(0, 242, 255, 0.5)); }
    }
    .nav-brand:hover .nav-logo {
      filter: drop-shadow(0 0 14px rgba(0, 242, 255, 0.7));
      transform: scale(1.06);
    }
    .nav-links {
      display: flex; align-items: center; gap: 36px; list-style: none;
    }
    .nav-links a {
      color: var(--text-muted); text-decoration: none; font-size: 14px;
      font-weight: 600; letter-spacing: .5px; transition: color .25s; position: relative;
    }
    .nav-links a::after {
      content: ""; position: absolute; bottom: -6px; left: 0;
      width: 0; height: 2px; border-radius: 2px;
      background: var(--accent-cyan);
      transition: width .3s;
    }
    .nav-links a:hover, .nav-links a.active { color: var(--text); }
    .nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
    .nav-login {
      padding: 8px 20px; border-radius: 10px;
      border: 1px solid rgba(14, 165, 233, 0.4);
      background: rgba(14, 165, 233, 0.12);
      color: var(--accent-cyan); font-size: 13px; font-weight: 700;
      text-decoration: none; letter-spacing: .5px; transition: all .25s;
    }
    .nav-login:hover {
      background: rgba(14, 165, 233, 0.25);
      border-color: var(--accent-cyan);
      box-shadow: 0 0 20px rgba(14, 165, 233, 0.2);
    }

    .product-hero {
      position: relative; min-height: 70vh; display: flex; align-items: center; justify-content: center;
      padding: 140px 24px 80px; overflow: hidden; text-align: center;
    }
    .product-hero::before {
      content: ""; position: absolute; inset: 0;
      background: #020617;
    }
    .hero-inner { position: relative; z-index: 1; max-width: 900px; }
    .hero-badge {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 8px 18px; border-radius: 999px; font-size: 13px; font-weight: 700;
      border: 1px solid var(--border); background: rgba(14, 165, 233, 0.1);
      color: var(--accent-cyan); letter-spacing: 1px; margin-bottom: 32px;
    }
    .hero-inner h1 {
      font-size: clamp(32px, 5vw, 56px); font-weight: 800; letter-spacing: 4px; line-height: 1.15; margin-bottom: 24px;
    }
    .hero-inner h1 span { color: var(--text); }
    .hero-inner p {
      font-size: clamp(15px, 1.8vw, 18px); color: var(--text-muted); line-height: 2; max-width: 640px; margin: 0 auto 40px;
    }
    .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
    .hero-btn {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 14px 28px; border-radius: 12px; font-size: 15px; font-weight: 700;
      text-decoration: none; letter-spacing: .5px; transition: all .25s;
    }
    .hero-btn.primary {
      background: var(--accent-cyan);
      color: #ffffff; box-shadow: 0 8px 30px rgba(14, 165, 233, 0.25);
    }
    .hero-btn.primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(14, 165, 233, 0.35); }
    .hero-btn.secondary {
      border: 1px solid var(--border); background: rgba(14, 165, 233, 0.03); color: var(--text);
    }
    .hero-btn.secondary:hover { border-color: rgba(14, 165, 233, 0.25); background: rgba(14, 165, 233, .06); }

    .stats-band {
      padding: 80px 24px;
      background: #020617;
    }
    .stats-grid {
      display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 900px; margin: 0 auto; text-align: center;
    }
    .stat-item {
      position: relative; padding: 56px 24px;
      display: flex; flex-direction: column; align-items: center; justify-content: center;
      border: 1px solid rgba(14, 165, 233, 0.45);
      border-radius: 20px;
      background: #020617;
      cursor: pointer;
      outline: none;
      box-shadow: inset 0 0 0 1px rgba(125, 211, 252, 0.12);
      transition: transform 0.3s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
    }
    .stat-item:hover,
    .stat-item:focus-visible {
      transform: translateY(-3px);
      border-color: rgba(125, 211, 252, 0.95);
      background: rgba(14, 165, 233, 0.06);
      box-shadow: 0 16px 40px rgba(14, 165, 233, 0.12), 0 0 0 3px rgba(14, 165, 233, 0.10), inset 0 0 0 1px rgba(125, 211, 252, 0.25);
    }
    .stat-item.is-active {
      border-color: #38bdf8;
      background: rgba(14, 165, 233, 0.10);
      box-shadow: 0 18px 48px rgba(14, 165, 233, 0.18), 0 0 0 3px rgba(14, 165, 233, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    }
    .stat-item:nth-child(3) {
      background: #020617;
    }
    .stat-item:nth-child(3):hover {
      box-shadow: 0 16px 40px rgba(14, 165, 233, 0.16), 0 0 0 3px rgba(14, 165, 233, 0.10), inset 0 0 0 1px rgba(125, 211, 252, 0.25);
    }
    .stat-item:nth-child(3).is-active {
      box-shadow: 0 18px 48px rgba(14, 165, 233, 0.18), 0 0 0 3px rgba(14, 165, 233, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    }
    .stat-item h3 {
      position: relative; z-index: 1;
      font-size: clamp(40px, 4.5vw, 54px); font-weight: 900; letter-spacing: -1px; line-height: 1;
      color: #f0f9ff;
      margin-bottom: 4px;
    }
    .stat-item:nth-child(3) h3 {
      font-size: clamp(58px, 7vw, 82px);
    }
    .stat-item p {
      position: relative; z-index: 1;
      color: var(--text-muted); font-size: 15px; letter-spacing: 2px; font-weight: 500;
    }
    .stat-item p::before {
      content: ""; display: block; width: 40px; height: 3px;
      margin: 0 auto 16px; border-radius: 3px;
      background: rgba(14, 165, 233, 0.35);
    }

    .features {
      padding: 120px 24px; max-width: 1100px; margin: 0 auto;
    }
    .section-header { text-align: center; margin-bottom: 80px; }
    .section-label {
      font-size: 12px; font-weight: 700; letter-spacing: 4px; color: var(--accent-cyan);
      margin-bottom: 20px; text-transform: uppercase;
    }
    .section-header h2 {
      font-size: clamp(26px, 3.6vw, 40px); font-weight: 300; letter-spacing: 3px;
    }
    .section-header h2 strong {
      font-weight: 800; color: #f0f9ff;
    }

    .feature-row {
      display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 100px;
    }
    .feature-row.reverse { direction: rtl; }
    .feature-row.reverse > * { direction: ltr; }
    .feature-visual {
      position: relative; aspect-ratio: 16/10; border-radius: 24px;
      background: #020617;
      overflow: hidden; display: grid; place-items: center;
    }

    .feature-canvas {
      position: absolute; inset: 0;
      width: 100%; height: 100%;
      border-radius: 24px;
    }

    .feature-text h3 {
      font-size: 24px; font-weight: 700; letter-spacing: 2px; margin-bottom: 16px;
    }
    .feature-text h3 .icon {
      display: inline-flex; align-items: center; justify-content: center;
      width: 36px; height: 36px; border-radius: 10px; margin-right: 12px;
      background: var(--accent-cyan);
      color: #ffffff; font-size: 16px; font-weight: 900; vertical-align: middle;
    }
    .feature-text p {
      color: var(--text-muted); font-size: 15px; line-height: 2; margin-bottom: 20px;
    }
    .feature-text ul { list-style: none; display: grid; gap: 10px; }
    .feature-text li {
      position: relative; padding-left: 22px; color: rgba(248, 250, 252, 0.7); font-size: 14px;
    }
    .feature-text li::before {
      content: ""; position: absolute; left: 0; top: 10px;
      width: 8px; height: 8px; border-radius: 50%;
      background: var(--accent-cyan);
    }

    .compare-section {
      padding: 100px 24px; background: #020617;
    }
    .compare-inner { max-width: 900px; margin: 0 auto; }
    .compare-inner .section-header { margin-bottom: 56px; }
    .compare-table {
      width: 100%; border-collapse: collapse; font-size: 15px;
    }
    .compare-table th, .compare-table td {
      padding: 20px 24px; text-align: left;
    }
    .compare-table th {
      color: var(--text-muted); font-weight: 600; font-size: 13px; letter-spacing: 1px; text-transform: uppercase;
      background: rgba(15, 23, 42, 0.5);
    }
    .compare-table th:nth-child(2) {
      color: #22d3ee; background: rgba(14, 165, 233, 0.1);
    }
    .compare-table td { color: rgba(248, 250, 252, .85); }
    .compare-table td:first-child { font-weight: 600; color: var(--text); padding-left: 24px; }
    .compare-table td:nth-child(2) {
      color: #f0f9ff; background: rgba(14, 165, 233, 0.035); padding-left: 80px;
    }
    .compare-table td:nth-child(3) {
      color: rgba(148, 163, 184, 0.7); padding-left: 104px;
    }
    .compare-table .check {
      display: inline-flex; align-items: center; justify-content: center;
      width: 20px; height: 20px; border-radius: 50%;
      background: rgba(14, 165, 233, 0.18); color: #22d3ee;
      font-size: 11px; font-weight: 900; margin-right: 6px;
    }
    .compare-table .cross {
      display: inline-flex; align-items: center; justify-content: center;
      width: 20px; height: 20px; border-radius: 50%;
      background: rgba(100, 116, 139, 0.1); color: rgba(148, 163, 184, 0.55);
      font-size: 11px; font-weight: 900; margin-right: 6px;
    }
    .compare-table tbody tr { transition: background 0.2s; }
    .compare-table tbody tr:hover td:nth-child(2) { background: rgba(14, 165, 233, 0.06); }

    .bottom-cta {
      padding: 120px 24px; text-align: center; position: relative; overflow: hidden;
      background: #020617;
    }
    .bottom-cta h2 {
      position: relative; z-index: 1;
      font-size: clamp(24px, 3.2vw, 36px); font-weight: 300; letter-spacing: 3px; margin-bottom: 20px;
    }
    .bottom-cta h2 strong {
      font-weight: 800; color: #f0f9ff;
    }
    .bottom-cta p { position: relative; z-index: 1; color: var(--text-muted); font-size: 16px; margin-bottom: 36px; }
    .bottom-cta .hero-actions { position: relative; z-index: 1; }

    .site-footer {
      padding: 24px;
      background: var(--record-footer-bg, #030712) !important;
      text-align: center;
    }
    .site-footer p {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      flex-wrap: nowrap;
      color: var(--record-footer-color, #030712);
      font-size: 12px;
      letter-spacing: 0;
      margin: 0;
      max-width: 100%;
      overflow-x: auto;
      white-space: nowrap;
    }
    .site-footer a { color: var(--record-footer-color, #030712); text-decoration: none; }
    .site-footer a:hover { color: var(--record-footer-color, #030712); }
    .gongan-record {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: inherit;
      text-decoration: none;
      font-size: inherit;
      flex: 0 0 auto;
      white-space: nowrap;
    }
    .gongan-record img {
      width: 14px;
      height: 14px;
      display: inline-block;
      flex: 0 0 auto;
      object-fit: contain;
      vertical-align: -2px;
    }
    .gongan-record .gongan-badge {
      width: 14px;
      height: 14px;
      display: inline-block;
      flex: 0 0 auto;
      vertical-align: -2px;
      background-color: var(--badge-color, currentColor);
      -webkit-mask: url("/static/gongan.png") no-repeat center / contain;
      mask: url("/static/gongan.png") no-repeat center / contain;
    }

    @media (max-width: 900px) {
      .top-nav { padding: 0 20px; }
      .feature-row, .feature-row.reverse { grid-template-columns: 1fr; direction: ltr; }
      .feature-row.reverse > * { direction: ltr; }
      .stats-grid { grid-template-columns: 1fr; gap: 40px; }
    }
    @media (max-width: 640px) {
      .nav-links li:not(:last-child) { display: none; }
    }
  </style>