/* roulang page: index */
:root {
      --primary: #1A5F7A;
      --primary-deep: #0E3B4B;
      --accent: #F29C38;
      --accent-hover: #E08B2A;
      --bg: #F8F9FA;
      --card-bg: #FFFFFF;
      --text: #1E293B;
      --text-secondary: #64748B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.1);
      --radius-sm: 8px;
      --radius: 12px;
      --radius-lg: 16px;
      --transition: 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      margin: 0;
      padding-top: 64px;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: color var(--transition);
    }
    a:hover {
      color: var(--accent);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1140px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 16px;
      padding-right: 16px;
    }
    /* 导航 */
    .navbar {
      background-color: #fff;
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      padding: 0 16px;
      height: 64px;
    }
    .navbar-brand {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-deep) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand i {
      font-size: 28px;
      color: var(--primary);
    }
    .navbar-nav .nav-link {
      font-size: 16px;
      color: var(--text) !important;
      margin: 0 6px;
      padding: 8px 12px;
      border-bottom: 2px solid transparent;
      transition: color var(--transition), border-color var(--transition);
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--primary) !important;
      border-bottom-color: var(--primary);
    }
    .search-box {
      border: 1px solid var(--border-light);
      border-radius: 20px;
      padding: 6px 16px;
      font-size: 14px;
      color: var(--text);
      outline: none;
      width: 180px;
      transition: border-color var(--transition);
    }
    .search-box:focus {
      border-color: var(--primary);
    }
    .btn-primary-custom {
      background-color: var(--accent);
      border: none;
      color: #fff;
      font-weight: 600;
      letter-spacing: 0.5px;
      border-radius: var(--radius-sm);
      padding: 10px 22px;
      transition: background-color var(--transition), transform 0.2s, box-shadow 0.2s;
      box-shadow: 0 4px 12px rgba(242,156,56,0.25);
    }
    .btn-primary-custom:hover {
      background-color: var(--accent-hover);
      transform: scale(1.03);
      box-shadow: 0 6px 16px rgba(242,156,56,0.4);
      color: #fff;
    }
    .btn-outline-custom {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 10px 22px;
      transition: all var(--transition);
    }
    .btn-outline-custom:hover {
      background-color: var(--primary);
      color: #fff;
    }
    /* 汉堡菜单自定义 */
    .navbar-toggler {
      border: none;
      padding: 4px 8px;
    }
    .navbar-toggler:focus {
      box-shadow: none;
    }
    @media (max-width: 991px) {
      .navbar-collapse {
        background: #fff;
        padding: 16px;
        border-radius: var(--radius);
        box-shadow: var(--shadow-md);
        margin-top: 8px;
      }
    }
    /* Hero */
    .hero {
      background-color: var(--bg);
      padding: 60px 0;
    }
    .hero h1 {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
    }
    .hero .lead {
      font-size: 18px;
      color: var(--text-secondary);
      margin: 16px 0 24px;
    }
    .hero-image {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      width: 100%;
      height: auto;
    }
    /* 板块标题 */
    .section-title {
      font-size: 28px;
      font-weight: 600;
      color: var(--primary-deep);
      margin-bottom: 40px;
      text-align: center;
    }
    /* 卡片通用 */
    .card-custom {
      background: var(--card-bg);
      border: none;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition);
      height: 100%;
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .icon-circle {
      font-size: 40px;
      color: var(--primary);
      transition: color var(--transition);
    }
    .card-custom:hover .icon-circle {
      color: var(--accent);
    }
    /* 案例瀑布 */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
      display: inline-block;
      width: 100%;
    }
    .case-tag {
      background: #E8F0F4;
      color: var(--primary);
      font-size: 12px;
      padding: 2px 10px;
      border-radius: 20px;
      display: inline-block;
      margin-right: 6px;
    }
    /* 对比表 */
    .compare-table th {
      background: var(--primary-deep);
      color: #fff;
      font-weight: 600;
    }
    .compare-table td, .compare-table th {
      padding: 14px 16px;
      vertical-align: middle;
    }
    .fa-check {
      color: #10B981;
    }
    .fa-xmark {
      color: #EF4444;
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: #F0F4F7;
      color: var(--primary-deep);
      box-shadow: none;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: transparent;
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
      background: transparent;
    }
    /* CTA横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #F0F4F7 0%, #E8F0F4 100%);
      padding: 60px 0;
      text-align: center;
    }
    /* 页脚 */
    .footer {
      background: var(--primary-deep);
      color: #fff;
      padding: 48px 0 24px;
    }
    .footer a {
      color: rgba(255,255,255,0.8);
      text-decoration: none;
    }
    .footer a:hover {
      color: var(--accent);
    }
    .footer .bi {
      font-size: 20px;
      margin-right: 8px;
    }
    .social-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border: 1px solid rgba(255,255,255,0.5);
      border-radius: 50%;
      margin-right: 12px;
      color: #fff;
      transition: all var(--transition);
    }
    .social-icon:hover {
      background: var(--accent);
      border-color: var(--accent);
      color: #fff;
    }
    @media (max-width: 991px) {
      .masonry-grid {
        column-count: 2;
      }
      .hero h1 {
        font-size: 30px;
      }
    }
    @media (max-width: 767px) {
      .masonry-grid {
        column-count: 1;
      }
      .hero h1 {
        font-size: 28px;
      }
      .section-title {
        font-size: 22px;
      }
      .compare-table-responsive {
        overflow-x: auto;
      }
    }