/* roulang page: index */
:root {
      --primary: #0EA57A;
      --primary-dark: #0B8E65;
      --primary-light: rgba(14, 165, 122, 0.08);
      --accent: #F85C3B;
      --accent-light: rgba(248, 92, 59, 0.1);
      --bg-light: #F4F7FA;
      --bg-white: #FFFFFF;
      --bg-dark: #1E2A38;
      --text-main: #333;
      --text-body: #444;
      --text-muted: #888;
      --text-light: #B0BEC5;
      --border-light: #E8ECF1;
      --border-input: #DDE2E8;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
      --shadow-card: 0 1px 6px rgba(0,0,0,0.05);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-pill: 50px;
      --font-h1: 2.25rem;
      --font-h2: 1.75rem;
      --font-h3: 1.25rem;
      --transition: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", "Segoe UI", system-ui, sans-serif;
      background-color: var(--bg-white);
      color: var(--text-body);
      line-height: 1.6;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-weight: 600;
      color: var(--text-main);
      letter-spacing: -0.3px;
    }
    
    h1 {
      font-size: var(--font-h1);
      line-height: 1.25;
      font-weight: 700;
      letter-spacing: -0.5px;
    }
    
    h2 {
      font-size: var(--font-h2);
      line-height: 1.35;
    }
    
    h3 {
      font-size: var(--font-h3);
      line-height: 1.4;
    }
    
    a {
      text-decoration: none;
      color: var(--primary);
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary-dark);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1140px;
      padding-left: 15px;
      padding-right: 15px;
    }
    
    /* 按钮系统 */
    .btn-primary-custom {
      background-color: var(--primary);
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--radius-pill);
      transition: var(--transition);
      box-shadow: 0 4px 10px rgba(14, 165, 122, 0.2);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary-custom:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 6px 16px rgba(14, 165, 122, 0.3);
      color: white;
      transform: translateY(-1px);
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 10px 30px;
      border-radius: var(--radius-pill);
      transition: var(--transition);
    }
    .btn-outline-custom:hover {
      background-color: var(--primary-light);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }
    
    .btn-link-custom {
      color: var(--primary);
      font-weight: 500;
      text-decoration: underline;
      text-underline-offset: 4px;
      padding: 0;
      background: none;
      border: none;
    }
    .btn-link-custom:hover {
      text-decoration: none;
      color: var(--primary-dark);
    }
    
    /* 导航卡片面板 */
    .navbar-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      margin: 12px 15px;
      padding: 8px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      position: relative;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-icon {
      font-size: 32px;
      color: var(--primary);
    }
    .logo-text {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      letter-spacing: 0.5px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .nav-icon-btn {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: #f0f2f5;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-muted);
      font-size: 1.2rem;
      transition: var(--transition);
      text-decoration: none;
      font-weight: 500;
    }
    .nav-icon-btn:hover {
      background: var(--primary-light);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }
    .nav-icon-btn.active {
      background: var(--primary-light);
      color: var(--primary);
    }
    .navbar-toggler-custom {
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--text-main);
    }
    
    /* Hero */
    .hero-bg {
      background: linear-gradient(135deg, #F4F7FA 0%, #FFFFFF 100%);
      padding: 60px 0 80px;
    }
    
    /* 板块间距 */
    section {
      padding: 80px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 48px 0;
      }
      h1 {
        font-size: 1.75rem;
      }
      h2 {
        font-size: 1.5rem;
      }
    }
    
    .bg-alternate {
      background-color: var(--bg-light);
    }
    
    /* 卡片系统 */
    .card-custom {
      background: var(--bg-white);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: none;
      height: 100%;
    }
    .card-custom:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .card-pricing {
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }
    .card-pricing.recommended {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-sm);
      transform: scale(1.02);
    }
    .card-scenario img {
      border-radius: var(--radius-sm) var(--radius-sm) 0 0;
      height: 200px;
      object-fit: cover;
      background: #E8ECF1;
    }
    
    /* 数据卡片 */
    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }
    
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: var(--bg-white);
      color: var(--primary);
      box-shadow: none;
      font-weight: 600;
    }
    .accordion-button:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(14,165,122,0.15);
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
    }
    
    /* 表单 */
    .form-control-custom {
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-input);
      padding: 12px 16px;
      transition: var(--transition);
    }
    .form-control-custom:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(14,165,122,0.15);
      outline: none;
    }
    
    /* 页脚 */
    .footer-dark {
      background: var(--bg-dark);
      color: var(--text-light);
    }
    .footer-dark a {
      color: var(--text-light);
      text-decoration: none;
    }
    .footer-dark a:hover {
      color: white;
    }
    
    /* 覆盖Bootstrap默认蓝色 */
    .btn-primary {
      background-color: var(--primary) !important;
      border-color: var(--primary) !important;
    }
    .btn-outline-primary {
      border-color: var(--primary) !important;
      color: var(--primary) !important;
    }
    .btn-outline-primary:hover {
      background-color: var(--primary) !important;
      color: white !important;
    }
    .text-primary {
      color: var(--primary) !important;
    }
    .bg-primary {
      background-color: var(--primary) !important;
    }