/* roulang page: index */
:root {
      --primary-deep: #0A3D62;
      --secondary-light: #E8F4F8;
      --accent-orange: #F39C12;
      --accent-orange-hover: #E67E22;
      --bg-white: #FFFFFF;
      --text-dark: #2C3E50;
      --text-muted: #7F8C8D;
      --border-light: #E0E6ED;
      --footer-bg: #1A252F;
      --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.08);
      --shadow-orange: 0 6px 15px rgba(243, 156, 18, 0.4);
      --focus-glow: 0 0 0 3px rgba(10, 61, 98, 0.1);
      --radius-card: 12px;
      --radius-btn: 30px;
      --radius-input: 8px;
      --transition: 0.3s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-white);
      color: var(--text-dark);
      line-height: 1.7;
      margin: 0;
      padding-top: 70px;
    }

    h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
      margin-bottom: 1rem;
    }

    h2 {
      font-size: 36px;
      font-weight: 600;
      line-height: 1.3;
      color: var(--text-dark);
      margin-bottom: 1rem;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
      line-height: 1.4;
      color: var(--primary-deep);
    }

    .section-padding {
      padding: 100px 0;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 15px;
      padding-right: 15px;
    }

    /* 导航栏 */
    .navbar-custom {
      background-color: var(--bg-white);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      height: 70px;
      padding: 0 1rem;
    }

    .navbar-brand-custom {
      display: flex;
      align-items: center;
      text-decoration: none;
      color: var(--primary-deep);
      font-weight: 700;
      font-size: 1.5rem;
    }

    .navbar-brand-custom i {
      font-size: 2rem;
      margin-right: 0.5rem;
      color: var(--primary-deep);
    }

    .nav-link-custom {
      color: var(--text-dark) !important;
      font-weight: 500;
      margin: 0 0.75rem;
      transition: color var(--transition);
    }

    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--primary-deep) !important;
    }

    .search-box {
      border-radius: 20px;
      background-color: #F8F9FA;
      border: 1px solid var(--border-light);
      padding: 0.5rem 1rem;
      width: 180px;
      transition: all var(--transition);
    }

    .search-box:focus {
      border-color: var(--primary-deep);
      box-shadow: var(--focus-glow);
      outline: none;
    }

    .btn-primary-custom {
      background-color: var(--accent-orange);
      border: none;
      color: white;
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      font-weight: 600;
      transition: all var(--transition);
      box-shadow: none;
    }

    .btn-primary-custom:hover {
      background-color: var(--accent-orange-hover);
      box-shadow: var(--shadow-orange);
      color: white;
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary-deep);
      color: var(--primary-deep);
      border-radius: var(--radius-btn);
      padding: 12px 32px;
      font-weight: 600;
      transition: all var(--transition);
    }

    .btn-outline-custom:hover {
      background-color: var(--primary-deep);
      color: white;
    }

    /* 卡片样式 */
    .card-service {
      background: var(--bg-white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      padding: 2rem;
      height: 100%;
      transition: all var(--transition);
    }

    .card-service:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .icon-circle {
      width: 60px;
      height: 60px;
      background-color: var(--secondary-light);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-deep);
      font-size: 1.8rem;
      margin-bottom: 1.5rem;
    }

    .badge-quant {
      background-color: transparent;
      color: var(--accent-orange);
      font-weight: 700;
      font-size: 0.9rem;
      border: 1px solid var(--accent-orange);
      border-radius: 20px;
      padding: 0.2rem 1rem;
      display: inline-block;
      margin-top: 1rem;
    }

    /* 数据看板数字 */
    .stat-number {
      font-size: 32px;
      font-weight: 700;
      color: var(--accent-orange);
      line-height: 1.2;
    }

    /* 结果对比区 */
    .results-bg {
      background-color: var(--secondary-light);
      border-radius: var(--radius-card);
      padding: 3rem;
    }

    .vs-divider {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent-orange);
      text-align: center;
    }

    /* FAQ手风琴 */
    .accordion-button:not(.collapsed) {
      background-color: var(--bg-white);
      color: var(--primary-deep);
      font-weight: 600;
      box-shadow: none;
    }

    .accordion-button:focus {
      border-color: var(--border-light);
      box-shadow: var(--focus-glow);
    }

    .accordion-item {
      border: 1px solid var(--border-light);
      margin-bottom: 0.5rem;
      border-radius: var(--radius-input);
    }

    /* 表单区 */
    .contact-section {
      background-color: var(--primary-deep);
      border-radius: var(--radius-card);
      padding: 3rem;
      color: white;
    }

    .contact-section h2 {
      color: white;
    }

    .form-control-custom {
      background: white;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-input);
      padding: 12px 16px;
      transition: all var(--transition);
    }

    .form-control-custom:focus {
      border-color: var(--primary-deep);
      box-shadow: var(--focus-glow);
    }

    .trust-badge-item {
      display: flex;
      align-items: center;
      margin-bottom: 1.5rem;
      color: rgba(255, 255, 255, 0.9);
    }

    .trust-badge-item i {
      font-size: 2rem;
      margin-right: 1rem;
      color: var(--accent-orange);
    }

    /* 页脚 */
    .footer-custom {
      background-color: var(--footer-bg);
      color: #BDC3C7;
      padding: 4rem 0 2rem;
    }

    .footer-custom a {
      color: #BDC3C7;
      text-decoration: none;
      transition: color var(--transition);
    }

    .footer-custom a:hover {
      color: white;
    }

    .footer-logo {
      display: flex;
      align-items: center;
      color: white;
      font-weight: 700;
      font-size: 1.5rem;
      margin-bottom: 1rem;
    }

    .footer-logo i {
      margin-right: 0.5rem;
    }

    @media (max-width: 768px) {
      h1 {
        font-size: 36px;
      }
      h2 {
        font-size: 28px;
      }
      .section-padding {
        padding: 60px 0;
      }
      .navbar-collapse {
        background: white;
        padding: 1rem;
        border-radius: 8px;
        box-shadow: var(--shadow-sm);
        margin-top: 0.5rem;
      }
      .search-box {
        width: 100%;
        margin-bottom: 1rem;
      }
      .hero-data-cards {
        flex-direction: column;
        gap: 1.5rem;
      }
    }