/* roulang page: index */
:root {
      --primary-deep: #0B3B5E;
      --primary-dark: #0A2E4A;
      --accent-cyan: #00A6A6;
      --cta-gold: #D4A843;
      --cta-gold-hover: #B8912F;
      --bg-light: #F7F9FC;
      --white: #FFFFFF;
      --text-main: #1A2B3C;
      --text-secondary: #5A6B7F;
      --text-light: #8A9BAE;
      --border-light: #DDE4ED;
      --shadow-card: 0 4px 20px rgba(11, 59, 94, 0.06);
      --shadow-card-hover: 0 8px 30px rgba(11, 59, 94, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", "SF Pro Display", system-ui, sans-serif;
      --transition: 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 导航栏 SaaS 命令栏风格 */
    .main-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 0 rgba(0,0,0,0.03);
      z-index: 1000;
      border-bottom: 1px solid rgba(221, 228, 237, 0.3);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .logo-text {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: -0.2px;
      text-decoration: none;
    }

    .logo-icon {
      font-size: 24px;
      color: var(--accent-cyan);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: color var(--transition), border-color var(--transition);
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-deep);
      border-bottom-color: var(--accent-cyan);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .search-icon {
      font-size: 18px;
      color: var(--text-secondary);
      cursor: pointer;
      transition: color var(--transition);
    }
    .search-icon:hover { color: var(--primary-deep); }

    .tracking-btn {
      background: transparent;
      border: 1px solid var(--border-light);
      color: var(--text-main);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: all var(--transition);
    }
    .tracking-btn:hover {
      border-color: var(--primary-deep);
      background: rgba(11,59,94,0.03);
    }

    .cta-nav {
      background: var(--cta-gold);
      color: white;
      border: none;
      padding: 8px 20px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: background var(--transition);
    }
    .cta-nav:hover { background: var(--cta-gold-hover); }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary-deep);
    }

    /* 区块通用 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }
    .section-subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 48px;
      max-width: 700px;
    }

    /* Hero */
    #hero {
      padding-top: 160px;
      padding-bottom: 100px;
      background: linear-gradient(135deg, #F0F4FA 0%, #FFFFFF 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-left {
      flex: 0 0 58%;
    }
    .hero-right {
      flex: 1;
      position: relative;
      min-height: 380px;
      background: url('/assets/images/backpic/back-1.webp') center/contain no-repeat;
      opacity: 0.9;
    }
    .hero-title {
      font-size: 44px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 32px;
      line-height: 1.6;
      max-width: 540px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--cta-gold);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: background var(--transition);
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary:hover { background: var(--cta-gold-hover); }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary-deep);
      color: var(--primary-deep);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: all var(--transition);
      text-decoration: none;
    }
    .btn-outline:hover { background: rgba(11,59,94,0.05); }

    /* 指标看板 */
    #metrics {
      background: linear-gradient(135deg, #0B3B5E 0%, #0A2E4A 100%);
      padding: 64px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-item .metric-number {
      font-size: 36px;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 8px;
    }
    .metric-label {
      font-size: 14px;
      color: rgba(255,255,255,0.7);
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      position: relative;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .service-icon {
      font-size: 32px;
      color: var(--accent-cyan);
      margin-bottom: 20px;
    }
    .service-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .service-desc {
      font-size: 15px;
      color: var(--text-secondary);
      margin-bottom: 18px;
      flex: 1;
    }
    .service-link {
      font-weight: 600;
      color: var(--primary-deep);
      text-decoration: none;
      font-size: 15px;
    }
    .badge-hot {
      position: absolute;
      top: 16px;
      right: 16px;
      background: #FEE9E9;
      color: #C44;
      font-size: 12px;
      font-weight: 600;
      padding: 2px 10px;
      border-radius: 20px;
    }

    /* 对比 */
    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
    .compare-col {
      background: white;
      border-radius: var(--radius-md);
      padding: 32px;
    }
    .compare-col.traditional {
      background: #F4F6F9;
    }
    .compare-col h3 {
      font-size: 22px;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      margin-bottom: 20px;
      align-items: center;
    }
    .progress-bg {
      width: 120px;
      height: 6px;
      background: #ddd;
      border-radius: 10px;
    }
    .progress-fill {
      height: 6px;
      background: var(--accent-cyan);
      border-radius: 10px;
      width: 0%;
    }
    .check-icon { color: var(--accent-cyan); }
    .cross-icon { color: #999; }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 28px;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: white;
      transition: background 0.2s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 28px;
      transition: max-height 0.3s ease, padding 0.3s;
      background: #F9FCFE;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 28px;
    }
    .faq-item.active .faq-question {
      background: #F0F7FA;
    }

    /* 联系表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group input, .form-group textarea {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-family: var(--font-sans);
      transition: border 0.2s;
    }
    .form-group input:focus, .form-group textarea:focus {
      outline: none;
      border-color: var(--accent-cyan);
    }
    .trust-badge {
      display: flex;
      gap: 24px;
      margin-top: 24px;
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer-brand {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-deep);
    }

    @media (max-width: 1024px) {
      .hero-grid { flex-direction: column; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-actions .search-icon, .tracking-btn { display: none; }
      .mobile-menu-toggle { display: block; }
      .services-grid, .comparison-wrapper, .contact-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title { font-size: 30px; }
      section { padding: 64px 0; }
      .container { padding: 0 20px; }
    }