/* roulang page: index */
:root {
      --primary-deep: #0A1F3F;
      --accent-red: #E62E2E;
      --accent-red-hover: #C71E1E;
      --bg-light: #F8FAFC;
      --card-white: #FFFFFF;
      --text-main: #1E293B;
      --text-secondary: #475569;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --success-green: #10B981;
      --footer-bg: #0A1F3F;
      --footer-text: #CBD5E1;
      --footer-muted: #94A3B8;
      
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 8px 20px rgba(0,0,0,0.08);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --transition-base: 0.25s ease;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* 导航栏 - 分屏联动结构 */
    .main-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: white;
      border-bottom: 1px solid var(--border-light);
      height: 64px;
      display: flex;
      align-items: center;
      backdrop-filter: blur(8px);
      background-color: rgba(255,255,255,0.92);
    }
    
    .header-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary-deep);
      text-decoration: none;
      letter-spacing: -0.5px;
    }
    .logo-icon {
      font-size: 1.8rem;
      color: var(--accent-red);
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    
    .nav-links a {
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: color 0.2s;
      position: relative;
      padding: 4px 0;
    }
    
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-red);
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-red);
      transition: width 0.2s ease;
    }
    
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    
    .btn-primary-sm {
      background: var(--accent-red);
      color: white;
      border: none;
      padding: 8px 20px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: background var(--transition-base);
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary-sm:hover {
      background: var(--accent-red-hover);
    }
    
    .search-icon {
      color: var(--text-secondary);
      font-size: 1.2rem;
      cursor: default;
      opacity: 0.7;
    }
    
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--primary-deep);
      cursor: pointer;
    }
    
    /* Hero 分屏布局 */
    .hero-section {
      display: flex;
      align-items: center;
      min-height: 85vh;
      background: var(--bg-light);
      overflow: hidden;
    }
    
    .hero-content {
      flex: 0 0 42%;
      padding-right: 40px;
      z-index: 2;
    }
    
    .hero-content h1 {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
      margin-bottom: 1.2rem;
    }
    
    .hero-content .subtitle {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
      max-width: 90%;
    }
    
    .hero-visual {
      flex: 0 0 58%;
      position: relative;
      height: 85vh;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center 30%;
      border-radius: 0 0 0 0;
      box-shadow: -10px 0 30px rgba(0,0,0,0.05);
    }
    
    .hero-visual::after {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0; bottom: 0;
      background: linear-gradient(90deg, rgba(10,31,63,0.15) 0%, rgba(10,31,63,0.02) 70%);
    }
    
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    
    .btn-primary {
      background: var(--accent-red);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: background var(--transition-base), transform 0.2s;
      text-decoration: none;
    }
    .btn-primary:hover {
      background: var(--accent-red-hover);
      transform: translateY(-2px);
    }
    
    .btn-secondary {
      background: transparent;
      color: var(--primary-deep);
      border: 2px solid var(--primary-deep);
      padding: 12px 30px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      transition: all var(--transition-base);
      text-decoration: none;
    }
    .btn-secondary:hover {
      background: var(--primary-deep);
      color: white;
      border-color: var(--primary-deep);
      transform: translateY(-2px);
    }
    
    /* 通用区块 */
    .section {
      padding: 80px 0;
    }
    
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 0.5rem;
      text-align: center;
    }
    
    .title-divider {
      width: 60px;
      height: 3px;
      background: var(--accent-red);
      margin: 10px auto 40px;
    }
    
    /* 痛点与方案 */
    .pain-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }
    
    .pain-item, .solution-item {
      display: flex;
      gap: 16px;
      background: var(--card-white);
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent-red);
      margin-bottom: 20px;
    }
    
    .pain-item i, .solution-item i {
      font-size: 1.8rem;
      color: var(--accent-red);
      width: 32px;
    }
    
    /* 服务体系卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    
    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: all var(--transition-base);
      display: flex;
      flex-direction: column;
    }
    
    .service-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-6px);
    }
    
    .card-img {
      height: 200px;
      background-size: cover;
      background-position: center;
    }
    
    .card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    
    .card-body h3 {
      font-size: 1.3rem;
      font-weight: 600;
      margin-bottom: 12px;
    }
    
    .card-body p {
      color: var(--text-secondary);
      margin-bottom: 20px;
      flex: 1;
    }
    
    .arrow-link {
      color: var(--accent-red);
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    
    /* 数据亮点 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    
    .stat-item {
      background: white;
      padding: 32px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
    }
    
    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--primary-deep);
      display: block;
    }
    
    .stat-label {
      color: var(--text-muted);
      font-size: 0.95rem;
    }
    
    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    
    .case-card {
      background: white;
      padding: 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      position: relative;
    }
    
    .quote-icon {
      font-size: 2.5rem;
      color: var(--accent-red);
      opacity: 0.3;
      margin-bottom: 12px;
    }
    
    /* FAQ */
    .faq-list {
      max-width: 720px;
      margin: 0 auto;
    }
    
    .faq-item {
      background: #F1F5F9;
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }
    
    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: #F1F5F9;
      transition: background 0.2s;
    }
    
    .faq-answer {
      padding: 0 24px 18px;
      color: var(--text-secondary);
      display: none;
      background: white;
    }
    
    .faq-item.active .faq-answer {
      display: block;
    }
    
    .faq-item.active .faq-question {
      background: white;
    }
    
    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(135deg, #0A1F3F 0%, #1a2f4a 100%);
      color: white;
      text-align: center;
      padding: 70px 24px;
    }
    
    .footer {
      background: var(--footer-bg);
      color: var(--footer-text);
      padding: 60px 0 20px;
    }
    
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    
    @media (max-width: 1024px) {
      .hero-section {
        flex-direction: column;
      }
      .hero-content {
        flex: 0 0 auto;
        padding: 40px 24px;
        text-align: center;
      }
      .hero-visual {
        flex: 0 0 400px;
        width: 100%;
        height: 400px;
      }
      .cards-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
    }
    
    @media (max-width: 768px) {
      .nav-links, .nav-actions .search-icon, .nav-actions .btn-primary-sm {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .pain-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }