/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary-900: #1E3A8A;
      --primary-700: #1E40AF;
      --primary-600: #2563EB;
      --primary-500: #3B82F6;
      --primary-100: #DBEAFE;
      --accent-500: #F59E0B;
      --accent-400: #FBBF24;
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #1E293B;
      --text-secondary: #475569;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
      --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.07), 0 10px 10px -5px rgba(0, 0, 0, 0.03);
      --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-page);
      color: var(--text-main);
      margin: 0;
      padding: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    @media (min-width: 768px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    /* 导航栏 */
    .navbar {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 4px 12px rgba(0,0,0,0.03);
      border-bottom: 1px solid rgba(226,232,240,0.6);
    }
    .nav-link {
      transition: color 0.2s, border-bottom 0.2s;
      border-bottom: 2px solid transparent;
      padding-bottom: 0.25rem;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-600);
      border-bottom-color: var(--primary-600);
    }
    .btn-primary {
      background-color: var(--accent-500);
      color: #0F172A;
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.625rem 1.75rem;
      transition: all 0.25s;
      box-shadow: 0 4px 6px rgba(245,158,11,0.25);
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      background-color: var(--accent-400);
      box-shadow: 0 8px 15px rgba(245,158,11,0.35);
      transform: translateY(-1px);
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid var(--primary-600);
      color: var(--primary-600);
      font-weight: 600;
      border-radius: 9999px;
      padding: 0.625rem 1.75rem;
      transition: all 0.25s;
    }
    .btn-ghost:hover {
      background-color: var(--primary-600);
      color: white;
      border-color: var(--primary-600);
    }
    .search-decor {
      background: #F1F5F9;
      border-radius: 9999px;
      padding: 0.5rem 1.2rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-muted);
      font-size: 0.875rem;
      cursor: default;
      border: 1px solid transparent;
      transition: all 0.2s;
    }
    /* hero */
    .hero-bg {
      background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
    }
    .illustration-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      border-radius: 2rem;
      box-shadow: 0 25px 50px -12px rgba(0,0,0,0.15);
      min-height: 320px;
      position: relative;
      overflow: hidden;
    }
    .illustration-bg::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(1px);
    }
    /* 卡片 */
    .feature-card {
      background: var(--bg-card);
      border-radius: 1.5rem;
      padding: 2rem 1.8rem;
      box-shadow: var(--shadow-card);
      transition: all 0.3s ease;
      border: 1px solid #F1F5F9;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-6px);
      border-color: #DBEAFE;
    }
    .icon-accent {
      color: var(--accent-500);
      font-size: 2rem;
      margin-bottom: 1.25rem;
    }
    /* 解决方案左右交替 */
    .solution-img {
      border-radius: 1.5rem;
      box-shadow: 0 20px 30px -12px rgba(0,0,0,0.12);
      object-fit: cover;
      width: 100%;
      height: auto;
    }
    /* 数据统计 */
    .stat-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary-900);
      line-height: 1.1;
    }
    .stat-label {
      color: var(--text-muted);
      font-size: 1rem;
      font-weight: 500;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      cursor: pointer;
      padding: 1.2rem 0;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.125rem;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 1.5rem;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-icon {
      transition: transform 0.3s ease;
      font-size: 1.4rem;
      color: var(--primary-600);
    }
    /* 证言卡片 */
    .testimonial-card {
      background: var(--bg-card);
      border-radius: 1.5rem;
      padding: 2rem;
      box-shadow: var(--shadow-card);
      border-left: 4px solid var(--accent-500);
    }
    /* 页脚 */
    .footer-dark {
      background: #0F172A;
      color: #CBD5E1;
    }
    .footer-dark a {
      color: #94A3B8;
      transition: color 0.2s;
    }
    .footer-dark a:hover {
      color: white;
    }
    /* 响应式调整 */
    @media (max-width: 768px) {
      .stat-number {
        font-size: 2.2rem;
      }
      .illustration-bg {
        min-height: 240px;
        margin-top: 1.5rem;
      }
    }
    .mobile-menu {
      display: none;
    }
    @media (max-width: 1024px) {
      .desktop-nav {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
    }