/* roulang page: index */
:root {
      --primary: #0A6E5C;
      --primary-dark: #085749;
      --secondary: #F4A261;
      --secondary-light: #f7b27a;
      --body-bg: #F9FBF8;
      --card-bg: #FFFFFF;
      --text-dark: #1E2D2B;
      --text-muted: #5B6B68;
      --border-color: #E0E8E4;
      --border-radius-lg: 20px;
      --border-radius-xl: 24px;
      --border-radius-btn: 50px;
      --shadow-sm: 0 4px 24px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(0,0,0,0.08);
      --shadow-nav: 0 1px 8px rgba(0,0,0,0.04);
      --transition: 0.3s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-numbers: "Inter", "Segoe UI", sans-serif;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--body-bg);
      color: var(--text-dark);
      line-height: 1.7;
      margin: 0;
      padding-top: 76px; /* 固定导航高度补偿 */
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      color: var(--text-dark);
    }
    
    h1 {
      font-size: 36px;
      line-height: 1.2;
    }
    
    h2 {
      font-size: 28px;
      line-height: 1.3;
    }
    
    h3 {
      font-size: 20px;
      font-weight: 600;
      line-height: 1.4;
    }
    
    .text-muted-custom {
      color: var(--text-muted);
    }
    
    .section-padding {
      padding: 80px 0;
    }
    
    /* 按钮重置 */
    .btn {
      border-radius: var(--border-radius-btn);
      padding: 12px 32px;
      font-weight: 600;
      font-size: 16px;
      transition: var(--transition);
    }
    
    .btn-primary-custom {
      background-color: var(--primary);
      border: 2px solid var(--primary);
      color: white;
    }
    
    .btn-primary-custom:hover {
      background-color: var(--primary-dark);
      border-color: var(--primary-dark);
      color: white;
      transform: scale(1.03);
    }
    
    .btn-outline-primary-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
    }
    
    .btn-outline-primary-custom:hover {
      background-color: var(--primary);
      color: white;
    }
    
    .btn-secondary-custom {
      background-color: var(--secondary);
      border: 2px solid var(--secondary);
      color: white;
    }
    
    .btn-secondary-custom:hover {
      background-color: var(--secondary-light);
      border-color: var(--secondary-light);
      color: white;
      transform: scale(1.03);
    }
    
    .btn-light-custom {
      background-color: white;
      color: var(--primary);
      border: 2px solid white;
      font-weight: 600;
    }
    
    .btn-light-custom:hover {
      background-color: transparent;
      color: white;
      border-color: white;
    }
    
    /* 导航 */
    .navbar {
      background-color: rgba(255,255,255,0.98);
      backdrop-filter: blur(8px);
      box-shadow: var(--shadow-nav);
      padding: 12px 0;
    }
    
    .navbar-brand {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary) !important;
      letter-spacing: -0.5px;
    }
    
    .navbar-nav .nav-link {
      color: var(--text-muted) !important;
      font-weight: 500;
      font-size: 15px;
      margin: 0 8px;
      position: relative;
      transition: var(--transition);
    }
    
    .navbar-nav .nav-link::after {
      content: '';
      display: block;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.3s;
      position: absolute;
      bottom: -4px;
      left: 0;
    }
    
    .navbar-nav .nav-link:hover {
      color: var(--primary) !important;
    }
    
    .navbar-nav .nav-link:hover::after {
      width: 100%;
    }
    
    .navbar .btn-secondary-custom {
      padding: 10px 28px;
      font-size: 15px;
    }
    
    /* 移动端导航按钮 */
    .navbar-toggler {
      border: none;
      padding: 0.25rem 0.5rem;
    }
    
    .navbar-toggler:focus {
      box-shadow: none;
      outline: 2px solid var(--primary);
    }
    
    /* Hero */
    .hero-section {
      min-height: 80vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 80% 20%, rgba(10,110,92,0.08) 0%, rgba(244,162,97,0.05) 70%, transparent 100%);
      position: relative;
      overflow: hidden;
    }
    
    .hero-illustration {
      max-width: 100%;
      height: auto;
      border-radius: 32px;
      filter: drop-shadow(0 20px 30px rgba(0,0,0,0.08));
    }
    
    /* 卡片通用 */
    .card-custom {
      background: var(--card-bg);
      border: none;
      border-radius: var(--border-radius-lg);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      padding: 32px;
      height: 100%;
    }
    
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    
    .icon-circle {
      width: 64px;
      height: 64px;
      background-color: rgba(10,110,92,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-size: 28px;
    }
    
    /* 场景卡片 */
    .scene-card {
      background: var(--card-bg);
      border-radius: var(--border-radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    
    .scene-card:hover {
      box-shadow: var(--shadow-md);
    }
    
    .scene-img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      border-radius: 16px;
    }
    
    /* 数据徽章区域 */
    .stats-container {
      background: linear-gradient(135deg, rgba(10,110,92,0.05) 0%, rgba(244,162,97,0.04) 100%);
      border-radius: var(--border-radius-xl);
      padding: 48px 32px;
    }
    
    .stat-number {
      font-family: var(--font-numbers);
      font-size: 48px;
      font-weight: 800;
      color: var(--secondary);
      line-height: 1.1;
    }
    
    .client-logo-placeholder {
      width: 80px;
      height: 36px;
      background: #ddd;
      border-radius: 8px;
      filter: grayscale(1);
      opacity: 0.7;
      transition: var(--transition);
      margin: 0 12px;
    }
    
    .client-logo-placeholder:hover {
      filter: grayscale(0);
      opacity: 1;
    }
    
    /* 价格卡片 */
    .pricing-card {
      background: var(--card-bg);
      border-radius: var(--border-radius-lg);
      padding: 40px 28px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
      position: relative;
      height: 100%;
    }
    
    .pricing-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-md);
    }
    
    .badge-featured {
      background: var(--secondary);
      color: white;
      border-radius: 20px;
      padding: 6px 16px;
      font-size: 14px;
      font-weight: 600;
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
    }
    
    .price-number {
      font-family: var(--font-numbers);
      font-size: 48px;
      font-weight: 800;
      color: var(--primary);
    }
    
    /* FAQ 手风琴 */
    .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: 12px !important;
      margin-bottom: 12px;
      background: var(--card-bg);
    }
    
    .accordion-button {
      font-weight: 600;
      font-size: 18px;
      color: var(--primary) !important;
      background: transparent;
      box-shadow: none !important;
      border-radius: 12px !important;
      padding: 20px 24px;
    }
    
    .accordion-button:not(.collapsed) {
      background-color: #F9FBF8;
      color: var(--primary-dark) !important;
    }
    
    .accordion-button::after {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%230A6E5C'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    }
    
    .accordion-body {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.7;
      padding: 0 24px 20px;
    }
    
    /* 底部 CTA Banner */
    .cta-banner {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      border-radius: var(--border-radius-xl);
      padding: 64px 32px;
    }
    
    /* 页脚 */
    .footer {
      background: #1E2D2B;
      color: rgba(255,255,255,0.8);
    }
    
    .footer a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      transition: var(--transition);
    }
    
    .footer a:hover {
      color: var(--secondary);
    }
    
    .footer .social-icon {
      font-size: 20px;
      margin-right: 16px;
      color: rgba(255,255,255,0.6);
    }
    
    .footer .social-icon:hover {
      color: var(--secondary);
    }
    
    /* 响应式调整 */
    @media (max-width: 992px) {
      h1 {
        font-size: 28px;
      }
      .section-padding {
        padding: 48px 0;
      }
      .navbar-nav {
        padding-top: 16px;
      }
      .navbar-nav .nav-link {
        margin: 4px 0;
      }
      .hero-section {
        text-align: center;
      }
      .hero-illustration {
        margin-top: 32px;
      }
    }
    
    @media (max-width: 768px) {
      .stat-number {
        font-size: 36px;
      }
      .card-custom {
        padding: 24px;
      }
    }