/* roulang page: index */
:root {
      --primary-deep: #0B1E3F;
      --secondary-silver: #3A7BD5;
      --accent-orange: #FF6B35;
      --bg-light: #F4F7FA;
      --white: #FFFFFF;
      --text-dark: #1A1A1A;
      --text-mid: #555555;
      --text-light: #999999;
      --border-light: #E5E9F0;
      --card-shadow: 0 4px 12px rgba(0,0,0,0.04);
      --card-hover-shadow: 0 12px 28px rgba(11,30,63,0.12);
      --border-radius-sm: 6px;
      --border-radius-md: 8px;
      --border-radius-lg: 12px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
      --font-number: "Inter", "SF Pro Display", -apple-system, sans-serif;
      --transition-base: all 0.3s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-mid);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      color: var(--text-dark);
    }
    
    a {
      color: var(--secondary-silver);
      text-decoration: none;
      transition: var(--transition-base);
    }
    a:hover {
      color: var(--primary-deep);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container-custom {
      max-width: 1140px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    
    /* 导航 */
    #header {
      background: var(--white);
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      height: 70px;
      position: sticky;
      top: 0;
      z-index: 1020;
    }
    .navbar {
      padding: 0 20px;
      height: 70px;
      background: var(--white);
    }
    .navbar-brand {
      display: flex;
      align-items: center;
      font-weight: 700;
      font-size: 22px;
      letter-spacing: 1px;
      color: var(--primary-deep) !important;
    }
    .navbar-brand svg {
      width: 36px;
      height: 36px;
      margin-right: 8px;
    }
    .navbar-nav .nav-link {
      color: var(--text-mid) !important;
      font-weight: 500;
      font-size: 15px;
      margin: 0 12px;
      padding: 8px 4px;
      border-bottom: 2px solid transparent;
      transition: var(--transition-base);
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: var(--secondary-silver) !important;
      border-bottom-color: var(--secondary-silver);
    }
    .search-box {
      background: var(--bg-light);
      border-radius: 20px;
      padding: 6px 16px;
      display: flex;
      align-items: center;
      margin-right: 12px;
      border: 1px solid transparent;
    }
    .search-box i {
      color: var(--text-light);
      font-size: 14px;
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      margin-left: 6px;
      font-size: 14px;
      width: 120px;
    }
    .btn-cta {
      background: var(--accent-orange);
      color: white;
      border-radius: var(--border-radius-sm);
      padding: 8px 20px;
      font-weight: 600;
      border: none;
      transition: var(--transition-base);
    }
    .btn-cta:hover {
      background: #e55a2b;
      color: white;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(255,107,53,0.3);
    }
    .btn-outline-light-custom {
      border: 1.5px solid white;
      background: transparent;
      color: white;
      border-radius: var(--border-radius-sm);
      padding: 8px 20px;
      font-weight: 500;
      transition: var(--transition-base);
    }
    .btn-outline-light-custom:hover {
      background: white;
      color: var(--primary-deep);
      border-color: white;
    }
    
    /* Hero */
    #hero {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 85vh;
      display: flex;
      align-items: center;
      position: relative;
    }
    #hero::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(90deg, rgba(11,30,63,0.8) 0%, rgba(11,30,63,0.4) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      width: 100%;
    }
    .hero-left {
      max-width: 600px;
    }
    .hero-left h1 {
      font-size: 44px;
      font-weight: 700;
      color: white;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-left .lead {
      font-size: 20px;
      color: rgba(255,255,255,0.9);
      margin-bottom: 32px;
    }
    .hero-buttons .btn {
      margin-right: 16px;
    }
    .glass-card {
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(10px);
      border-radius: var(--border-radius-lg);
      padding: 24px 28px;
      border: 1px solid rgba(255,255,255,0.2);
      display: flex;
      flex-direction: column;
      gap: 20px;
      min-width: 240px;
    }
    .metric-item h3 {
      font-family: var(--font-number);
      font-size: 32px;
      font-weight: 700;
      color: white;
      margin-bottom: 4px;
    }
    .metric-item small {
      font-size: 13px;
      color: rgba(255,255,255,0.7);
    }
    
    /* 通用板块 */
    .section-padding {
      padding: 80px 0;
    }
    .section-title {
      font-size: 28px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--primary-deep);
    }
    .section-subtitle {
      color: var(--text-mid);
      font-size: 16px;
      margin-bottom: 48px;
    }
    
    /* 数据看板 */
    #dashboard {
      background: var(--bg-light);
    }
    .dashboard-card {
      background: var(--white);
      border-radius: var(--border-radius-md);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
      border: 1px solid var(--border-light);
    }
    .dashboard-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }
    .dashboard-number {
      font-family: var(--font-number);
      font-size: 40px;
      font-weight: 700;
      color: var(--primary-deep);
    }
    .dashboard-unit {
      font-size: 16px;
      color: var(--text-light);
      margin-left: 2px;
    }
    .dashboard-label {
      font-size: 14px;
      color: var(--text-mid);
      margin-top: 8px;
    }
    
    /* 服务卡片 */
    .service-card {
      background: var(--white);
      border-radius: var(--border-radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
      height: 100%;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
    }
    .service-icon {
      width: 70px;
      height: 70px;
      background: var(--bg-light);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .service-icon img {
      width: 40px;
      height: 40px;
      object-fit: contain;
    }
    .service-card h3 {
      font-size: 20px;
      margin-bottom: 10px;
    }
    .service-link {
      font-weight: 500;
      color: var(--secondary-silver);
      margin-top: 16px;
      display: inline-block;
    }
    
    /* 对比 */
    .comparison-wrapper {
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }
    .vs-badge {
      width: 64px;
      height: 64px;
      background: white;
      border: 2px solid var(--secondary-silver);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-deep);
      position: absolute;
      z-index: 5;
      background: white;
      box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    }
    .compare-card {
      background: white;
      border-radius: var(--border-radius-md);
      padding: 32px;
      flex: 1;
      border: 1px solid var(--border-light);
    }
    .compare-card.traditional {
      background: #f9f9f9;
      border-color: #ddd;
    }
    .compare-card.xingkong {
      border: 2px solid var(--secondary-silver);
      background: #f0f5ff;
    }
    .compare-list {
      list-style: none;
      padding-left: 0;
      margin-top: 20px;
    }
    .compare-list li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
    }
    .compare-list i {
      margin-right: 10px;
    }
    
    /* 案例卡片 */
    .case-card {
      background: white;
      border-radius: var(--border-radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition-base);
      border: 1px solid var(--border-light);
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-hover-shadow);
    }
    .case-img {
      height: 180px;
      object-fit: cover;
    }
    
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background: #f0f5ff;
      color: var(--secondary-silver);
      font-weight: 600;
      box-shadow: none;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: var(--border-light);
    }
    
    /* CTA */
    #cta {
      background: linear-gradient(135deg, #0B1E3F 0%, #1A3A6B 100%);
    }
    .cta-form input {
      border-radius: var(--border-radius-sm);
      padding: 10px 16px;
      border: none;
    }
    
    /* Footer */
    #footer {
      background: var(--primary-deep);
      color: #CCD6E0;
    }
    .footer-links a {
      color: #CCD6E0;
      display: block;
      margin-bottom: 6px;
    }
    .footer-links a:hover {
      color: white;
    }
    .social-icon {
      width: 38px;
      height: 38px;
      background: rgba(255,255,255,0.1);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-right: 8px;
      color: white;
      transition: var(--transition-base);
    }
    .social-icon:hover {
      background: var(--accent-orange);
      color: white;
    }
    
    @media (max-width: 991px) {
      .hero-left h1 { font-size: 34px; }
      .glass-card { margin-top: 30px; }
      .comparison-wrapper { flex-direction: column; }
      .vs-badge { position: relative; margin: 20px 0; }
    }
    @media (max-width: 767px) {
      .section-padding { padding: 60px 0; }
      .navbar-collapse { background: white; padding: 20px; }
      .hero-left h1 { font-size: 28px; }
    }