/* roulang page: index */
:root {
      --primary: #1A5F7A;
      --primary-hover: #154E61;
      --accent: #F28C38;
      --accent-hover: #E07B2C;
      --bg-light: #F7F9FC;
      --card-bg: #FFFFFF;
      --text-main: #1E293B;
      --text-heading: #0F172A;
      --text-muted: #475569;
      --border-light: #E2E8F0;
      --success: #10B981;
      --danger: #EF4444;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-mono: "Inter", "SF Mono", "Menlo", monospace;
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08);
      --transition-base: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.8;
      font-size: 16px;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, h5 {
      font-family: var(--font-sans);
      color: var(--text-heading);
    }
    
    a {
      color: var(--primary);
      transition: var(--transition-base);
      text-decoration: none;
    }
    a:hover {
      color: var(--primary-hover);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1200px;
      padding-left: 24px;
      padding-right: 24px;
    }
    
    /* 导航栏 */
    .navbar-custom {
      background: rgba(255,255,255,0.98);
      backdrop-filter: blur(10px);
      box-shadow: 0 1px 6px rgba(0,0,0,0.02);
      padding: 12px 0;
      transition: var(--transition-base);
      z-index: 1000;
    }
    .navbar-custom .navbar-brand {
      font-weight: 700;
      font-size: 24px;
      color: var(--primary);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .navbar-custom .nav-link {
      color: var(--text-muted);
      font-size: 16px;
      font-weight: 500;
      margin: 0 10px;
      padding: 8px 4px;
      position: relative;
      transition: var(--transition-base);
    }
    .navbar-custom .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .navbar-custom .nav-link:hover,
    .navbar-custom .nav-link.active {
      color: var(--primary);
    }
    .navbar-custom .nav-link:hover::after,
    .navbar-custom .nav-link.active::after {
      width: 100%;
    }
    .navbar-toggler {
      border: none;
      box-shadow: none;
      padding: 0;
    }
    .navbar-toggler:focus {
      box-shadow: none;
    }
    
    @media (max-width: 991.98px) {
      .navbar-collapse {
        background: white;
        padding: 24px;
        border-radius: var(--border-radius-card);
        box-shadow: var(--shadow-card);
        margin-top: 16px;
      }
      .navbar-custom .nav-link {
        margin: 8px 0;
      }
    }
    
    /* 区块通用 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 56px 0;
      }
    }
    
    .section-title {
      font-size: 28px;
      font-weight: 600;
      margin-bottom: 16px;
      letter-spacing: -0.3px;
    }
    .section-subtitle {
      color: var(--text-muted);
      font-size: 16px;
      margin-bottom: 48px;
    }
    
    /* Hero */
    .hero-section {
      background-color: var(--bg-light);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      position: relative;
      padding: 120px 0 100px;
    }
    .hero-section::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(247, 249, 252, 0.85);
      backdrop-filter: blur(2px);
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-title {
      font-size: 36px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text-heading);
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 500px;
      margin: 20px 0 32px;
    }
    .btn-primary-custom {
      background: var(--primary);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--border-radius-btn);
      font-size: 16px;
      transition: var(--transition-base);
      letter-spacing: 0.5px;
    }
    .btn-primary-custom:hover {
      background: var(--primary-hover);
      color: white;
    }
    .btn-accent {
      background: var(--accent);
      border: none;
      color: white;
      font-weight: 600;
      padding: 16px 40px;
      border-radius: var(--border-radius-btn);
      font-size: 18px;
      transition: var(--transition-base);
    }
    .btn-accent:hover {
      background: var(--accent-hover);
      transform: scale(1.03);
      color: white;
    }
    .btn-outline-primary-custom {
      background: white;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--border-radius-btn);
      transition: var(--transition-base);
    }
    .btn-outline-primary-custom:hover {
      background: rgba(26,95,122,0.05);
      color: var(--primary);
    }
    
    .data-dashboard {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      margin-top: 30px;
    }
    .data-card {
      background: var(--card-bg);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-card);
      padding: 24px 20px;
      text-align: center;
      flex: 1;
      min-width: 120px;
      transition: var(--transition-base);
    }
    .data-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .data-number {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 700;
      color: var(--primary);
    }
    .data-label {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 8px;
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 30px;
      }
      .data-dashboard {
        flex-direction: column;
      }
    }
    
    /* 卡片通用 */
    .custom-card {
      background: var(--card-bg);
      border-radius: var(--border-radius-card);
      box-shadow: var(--shadow-card);
      padding: 32px;
      transition: var(--transition-base);
      height: 100%;
      border: none;
    }
    .custom-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .icon-circle {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: rgba(26,95,122,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 24px;
      color: var(--primary);
      font-size: 24px;
    }
    
    /* 服务矩阵卡片图片 */
    .service-img {
      width: 100%;
      height: 140px;
      object-fit: cover;
      border-radius: 12px 12px 0 0;
    }
    
    /* 数据对比表格风格 */
    .compare-table {
      background: white;
      border-radius: var(--border-radius-card);
      padding: 24px;
      box-shadow: var(--shadow-card);
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid var(--border-light);
    }
    
    /* FAQ手风琴 */
    .accordion-button:not(.collapsed) {
      background-color: rgba(26,95,122,0.04);
      color: var(--primary);
      font-weight: 600;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: var(--border-light);
    }
    
    /* CTA区域 */
    .cta-section {
      background: var(--primary);
      border-radius: 0;
      color: white;
    }
    .cta-section .form-control {
      border-radius: var(--border-radius-btn);
      padding: 12px;
      border: none;
      background: white;
    }
    .cta-section .form-control:focus {
      border: 2px solid var(--accent);
      box-shadow: none;
    }
    
    /* 页脚 */
    .footer-custom {
      background: #0F172A;
      color: rgba(255,255,255,0.8);
      padding: 48px 0 24px;
    }
    .footer-custom a {
      color: rgba(255,255,255,0.7);
    }
    .footer-custom a:hover {
      color: var(--accent);
    }
    .footer-logo {
      font-weight: 700;
      font-size: 20px;
      color: white;
    }