/* roulang page: index */
:root {
      --primary: #0A2540;
      --primary-hover: #072033;
      --accent: #00B4D8;
      --accent-light: #00D4F0;
      --bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --success: #10B981;
      --radius-sm: 8px;
      --radius: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(10, 37, 64, 0.08), 0 1px 2px rgba(10, 37, 64, 0.06);
      --shadow: 0 4px 12px rgba(10, 37, 64, 0.08);
      --shadow-hover: 0 10px 25px rgba(10, 37, 64, 0.12);
      --transition: 0.25s ease;
      --max-width: 1200px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      font-weight: 600;
      border: none;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all var(--transition);
      background: transparent;
    }
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 浮动Dock导航 */
    .dock-nav {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 48px);
      max-width: 1100px;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: 60px;
      box-shadow: 0 4px 20px rgba(10, 37, 64, 0.1);
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 1000;
      border: 1px solid rgba(255,255,255,0.5);
    }
    .dock-logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
      white-space: nowrap;
    }
    .dock-logo i {
      color: var(--accent);
      margin-right: 6px;
    }
    .dock-links {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .dock-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      transition: color var(--transition);
      white-space: nowrap;
    }
    .dock-links a:hover {
      color: var(--accent);
    }
    .dock-cta {
      background: var(--accent);
      color: white;
      padding: 10px 22px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(0,180,216,0.3);
      white-space: nowrap;
      transition: all var(--transition);
    }
    .dock-cta:hover {
      background: var(--accent-light);
      box-shadow: 0 8px 18px rgba(0,180,216,0.4);
      transform: scale(1.02);
    }
    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: var(--primary);
      background: none;
      border: none;
    }
    /* Hero */
    #hero {
      padding: 140px 0 80px;
      background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-content {
      flex: 1;
    }
    .hero-content h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary);
      margin-bottom: 20px;
    }
    .hero-content .subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.6;
    }
    .btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      box-shadow: 0 6px 18px rgba(0,180,216,0.25);
    }
    .btn-primary:hover {
      background: var(--accent-light);
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(0,180,216,0.35);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .hero-image {
      flex: 1;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
    }
    .hero-image img {
      width: 100%;
      object-fit: cover;
      border-radius: var(--radius-lg);
    }
    /* 通用区块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 56px;
    }
    .section-title h2 {
      font-size: 36px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-title p {
      font-size: 1.1rem;
      color: var(--text-muted);
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
      border: 1px solid var(--border);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .value-card i, .feature-icon {
      font-size: 2.4rem;
      color: var(--accent);
      margin-bottom: 20px;
      display: inline-block;
    }
    .value-card h3, .feature-card h3 {
      font-size: 1.4rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .scenario-card {
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: var(--card-bg);
      box-shadow: var(--shadow-sm);
    }
    .scenario-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .scenario-content {
      padding: 24px;
    }
    .case-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--success);
    }
    .pricing-card {
      text-align: center;
      position: relative;
    }
    .pricing-card.featured {
      border: 2px solid var(--accent);
      box-shadow: var(--shadow);
    }
    .badge {
      background: var(--accent);
      color: white;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 0.8rem;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      white-space: nowrap;
    }
    .price {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary);
      margin: 16px 0;
    }
    .faq-item {
      border-bottom: 1px solid var(--border);
      padding: 16px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-muted);
    }
    .faq-answer.open {
      max-height: 200px;
      margin-top: 12px;
    }
    #cta {
      background: linear-gradient(135deg, #EFF6FF, #F8FAFC);
    }
    .footer {
      background: var(--primary);
      color: rgba(255,255,255,0.85);
      padding: 60px 0 30px;
    }
    .footer a:hover {
      color: var(--accent-light);
    }
    @media (max-width: 1024px) {
      .dock-links { gap: 16px; }
      .hero-grid { flex-direction: column; }
      .grid-3 { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .dock-nav {
        justify-content: space-between;
      }
      .dock-links, .dock-cta {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu {
        display: none;
        flex-direction: column;
        background: white;
        position: absolute;
        top: 70px;
        left: 20px;
        right: 20px;
        border-radius: 24px;
        padding: 24px;
        box-shadow: 0 20px 40px rgba(0,0,0,0.15);
      }
      .mobile-menu.active {
        display: flex;
      }
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .hero-content h1 { font-size: 32px; }
      section { padding: 60px 0; }
    }