/* roulang page: index */
* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --primary-deep: #0A0E1A;
      --primary-dark: #141B2D;
      --gold: #C8A951;
      --gold-light: #F0D78C;
      --purple: #6C3CE1;
      --cyan: #00F0FF;
      --text-light: #E0E0E0;
      --text-body: #B0B8CC;
      --text-muted: #6B7280;
      --glass-bg: rgba(20, 27, 45, 0.7);
      --glass-border: rgba(200, 169, 81, 0.15);
      --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 1px rgba(200, 169, 81, 0.2);
      --card-hover-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(200, 169, 81, 0.3);
      --radius-card: 16px;
      --radius-btn: 30px;
      --radius-input: 12px;
      --font-heading: 'Inter', '阿里巴巴普惠体', 'PingFang SC', system-ui, sans-serif;
      --font-body: 'PingFang SC', 'Inter', system-ui, sans-serif;
      --font-mono: 'DIN Alternate', 'Courier New', monospace;
    }
    body {
      background: radial-gradient(circle at 20% 10%, #1a1f35, #0A0E1A 80%);
      font-family: var(--font-body);
      color: var(--text-body);
      line-height: 1.75;
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-body);
      border: none;
      background: none;
      transition: all 0.25s ease;
    }
    /* 导航 */
    #nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 14, 26, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(200, 169, 81, 0.3);
      transition: background 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--gold);
      letter-spacing: 1px;
      font-family: var(--font-heading);
    }
    .logo i {
      font-size: 2rem;
      color: var(--gold-light);
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-menu a {
      color: var(--text-light);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 8px 0;
    }
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--gold);
      transition: width 0.25s;
    }
    .nav-menu a:hover::after,
    .nav-menu a.active::after {
      width: 100%;
    }
    .nav-menu a.active {
      color: var(--gold);
    }
    .mobile-bottom-nav {
      display: none;
    }
    /* Hero */
    #hero {
      padding: 140px 0 80px;
      position: relative;
      overflow: hidden;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      background-color: rgba(10, 14, 26, 0.6);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-text {
      flex: 1;
    }
    .hero-title {
      font-size: 52px;
      font-weight: 700;
      background: linear-gradient(to right, #C8A951, #F0D78C);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 20px;
      font-family: var(--font-heading);
    }
    .hero-sub {
      font-size: 1.3rem;
      color: #ccc;
      margin-bottom: 36px;
    }
    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #C8A951, #b8942e);
      color: #0A0E1A;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      box-shadow: 0 8px 20px rgba(200, 169, 81, 0.3);
      font-size: 1rem;
      letter-spacing: 0.5px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #F0D78C, #C8A951);
      box-shadow: 0 0 24px rgba(200, 169, 81, 0.6);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1.5px solid #5a5f72;
      color: #E0E0E0;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      background: rgba(255,255,255,0.03);
      backdrop-filter: blur(4px);
    }
    .btn-outline:hover {
      border-color: var(--cyan);
      color: var(--cyan);
      box-shadow: 0 0 12px rgba(0,240,255,0.3);
    }
    .hero-panel {
      flex: 0.9;
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      border-radius: 24px;
      border: 1px solid var(--glass-border);
      padding: 24px;
      box-shadow: var(--card-shadow);
      transform: perspective(600px) rotateY(-2deg) rotateX(1deg);
      transition: transform 0.3s;
      color: white;
    }
    .marquee {
      margin-top: 50px;
      background: rgba(0,240,255,0.08);
      padding: 12px 20px;
      border-radius: 40px;
      overflow: hidden;
      white-space: nowrap;
      color: var(--cyan);
      font-weight: 500;
      backdrop-filter: blur(10px);
    }
    /* 数据看板 */
    #stats {
      padding: 90px 0;
    }
    .section-title {
      font-size: 36px;
      font-weight: 600;
      color: white;
      margin-bottom: 50px;
      font-family: var(--font-heading);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 28px 16px;
      text-align: center;
      box-shadow: var(--card-shadow);
      transition: all 0.3s;
    }
    .stat-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
    }
    .stat-icon {
      font-size: 2rem;
      color: var(--cyan);
      margin-bottom: 15px;
    }
    .stat-number {
      font-size: 48px;
      font-weight: 800;
      color: var(--cyan);
      font-family: var(--font-mono);
    }
    /* 服务矩阵 */
    #services {
      padding: 90px 0;
    }
    .services-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      grid-template-rows: auto auto;
      gap: 24px;
    }
    .service-card {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      position: relative;
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .service-card.large {
      grid-row: span 1;
    }
    .service-card h3 {
      font-size: 22px;
      font-weight: 600;
      color: white;
      margin: 16px 0 10px;
    }
    .service-link {
      color: var(--gold);
      font-weight: 600;
      margin-top: 18px;
      display: inline-block;
    }
    /* 对比 */
    #compare {
      padding: 90px 0;
    }
    .compare-panels {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .panel {
      background: rgba(20,27,45,0.6);
      backdrop-filter: blur(12px);
      border-radius: 24px;
      padding: 32px;
    }
    .panel.winner {
      border: 1px solid var(--gold);
      box-shadow: 0 0 18px rgba(200,169,81,0.25);
    }
    /* FAQ */
    #faq {
      padding: 90px 0;
    }
    .faq-item {
      background: var(--glass-bg);
      backdrop-filter: blur(18px);
      border-left: 4px solid #4B5563;
      margin-bottom: 20px;
      border-radius: 12px;
      padding: 18px 24px;
      cursor: pointer;
    }
    .faq-item.active {
      border-left-color: var(--gold);
    }
    /* CTA Footer */
    #cta-footer {
      background: #060A14;
      padding: 70px 0 40px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-top: 50px;
    }
    @media (max-width: 1024px) {
      .stats-grid { grid-template-columns: repeat(3,1fr); }
      .services-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero-grid { flex-direction: column; }
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .compare-panels { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 576px) {
      .nav-menu { display: none; }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        width: 100%;
        background: rgba(10,14,26,0.9);
        backdrop-filter: blur(20px);
        justify-content: space-around;
        padding: 12px 10px;
        z-index: 999;
      }
      .hero-title { font-size: 32px; }
      .stats-grid { grid-template-columns: 1fr; }
    }