/* roulang page: index */
:root {
      --primary: #1A5F7A;
      --primary-soft: rgba(26, 95, 122, 0.08);
      --secondary: #0E9E6D;
      --bg: #FAFBFD;
      --surface: #FFFFFF;
      --text-main: #0F172A;
      --text-secondary: #475569;
      --border: #E2E8F0;
      --success: #059669;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --shadow-sm: 0 1px 3px rgba(15,23,42,0.04), 0 1px 2px rgba(15,23,42,0.06);
      --shadow-hover: 0 12px 28px rgba(15,23,42,0.08), 0 4px 12px rgba(15,23,42,0.05);
      --transition: all 0.2s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      margin: 0;
      background-color: var(--bg);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 标题字体 */
    h1, h2, h3, .font-display {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    }
    
    /* 按钮与链接重置 */
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
    }
    
    /* 玻璃导航 */
    .glass-nav {
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.7);
      position: sticky;
      top: 0;
      z-index: 50;
      height: 64px;
      display: flex;
      align-items: center;
    }
    
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      padding: 08px 4px;
      margin: 0 12px;
      position: relative;
      transition: var(--transition);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background-color: var(--secondary);
      transition: width 0.2s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    
    .btn-outline-primary {
      border: 1px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline-primary:hover {
      background: var(--primary);
      color: white;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
      box-shadow: 0 4px 10px rgba(26,95,122,0.2);
    }
    .btn-primary:hover {
      background: #144b60;
      box-shadow: 0 8px 18px rgba(26,95,122,0.25);
    }
    .btn-green {
      background: var(--secondary);
      color: white;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: var(--transition);
    }
    .btn-green:hover {
      background: #078a58;
    }
    
    .card {
      background: var(--surface);
      border-radius: var(--radius-card);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    
    .tag {
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 500;
      padding: 4px 14px;
      display: inline-block;
    }
    
    .section-padding {
      padding: 120px 0;
    }
    @media (max-width: 1023px) {
      .section-padding {
        padding: 80px 0;
      }
    }
    @media (max-width: 768px) {
      .section-padding {
        padding: 60px 0;
      }
      .glass-nav .nav-links {
        display: none;
      }
    }
    
    .highlight-card {
      border-left: 6px solid var(--secondary);
    }
    
    /* 移动端菜单 */
    .mobile-menu-toggle {
      display: none;
    }
    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
    }