/* roulang page: index */
:root {
      --primary-coral: #FF6B4A;
      --primary-coral-dark: #E55A3A;
      --deep-blue: #0B2B5E;
      --deep-blue-light: #123A6B;
      --bg-light: #F7F8FA;
      --card-white: #FFFFFF;
      --gold-accent: #F5A623;
      --text-dark: #1E293B;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 8px 30px rgba(0,0,0,0.04);
      --shadow-hover: 0 16px 40px rgba(0,0,0,0.08);
      --radius-xl: 20px;
      --radius-lg: 12px;
      --radius-full: 50px;
      --transition-base: all 0.25s ease;
      --font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
      --container-max: 1280px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-family);
      line-height: 1.7;
      background-color: var(--bg-light);
      color: var(--text-dark);
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition-base);
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      outline: none;
      transition: var(--transition-base);
    }

    .container {
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 区块标题装饰 */
    .section-title {
      font-weight: 700;
      font-size: 2.2rem;
      color: var(--deep-blue);
      margin-bottom: 1.5rem;
      padding-left: 20px;
      border-left: 4px solid var(--primary-coral);
      line-height: 1.3;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.02);
      z-index: 1000;
      display: flex;
      align-items: center;
      transition: background 0.3s, box-shadow 0.3s;
    }
    .navbar.scrolled {
      background: rgba(255, 255, 255, 1);
      box-shadow: 0 4px 24px rgba(0,0,0,0.06);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--deep-blue);
      letter-spacing: 0.5px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary-coral), #FF8A6B);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 18px;
    }
    .nav-menu {
      display: flex;
      gap: 2rem;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-link {
      font-weight: 500;
      font-size: 15px;
      color: var(--text-dark);
      position: relative;
      padding: 6px 0;
      white-space: nowrap;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary-coral);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      width: 100%;
    }
    .nav-cta {
      background: var(--primary-coral);
      color: white;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-full);
      font-size: 15px;
      white-space: nowrap;
    }
    .nav-cta:hover {
      background: var(--primary-coral-dark);
      box-shadow: 0 8px 18px rgba(255,107,74,0.3);
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      background: linear-gradient(180deg, rgba(11,43,94,0.65) 0%, rgba(18,58,107,0.45) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: flex-start;
      padding-top: 72px;
      position: relative;
    }
    .hero-content {
      max-width: 700px;
      color: white;
    }
    .hero h1 {
      font-weight: 800;
      font-size: clamp(2.5rem, 6vw, 4rem);
      letter-spacing: -0.02em;
      line-height: 1.25;
      margin-bottom: 1.5rem;
      text-shadow: 0 8px 18px rgba(0,0,0,0.3);
    }
    .hero .typed-text {
      font-size: 1.5rem;
      font-weight: 400;
      margin-bottom: 2.5rem;
      min-height: 2.5rem;
      opacity: 0.95;
    }
    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary-coral);
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-size: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition-base);
    }
    .btn-primary:hover {
      background: var(--primary-coral-dark);
      box-shadow: 0 14px 28px rgba(255,107,74,0.45);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 12px 30px;
      border-radius: var(--radius-full);
      font-size: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline:hover {
      background: rgba(255,255,255,0.15);
      border-color: white;
    }

    /* 卡片通用 */
    .card {
      background: var(--card-white);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-sm);
      transition: var(--transition-base);
      overflow: hidden;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    /* 数据徽章 */
    .stat-badge {
      text-align: center;
      padding: 2rem 1.5rem;
    }
    .stat-number {
      font-weight: 800;
      font-size: 3rem;
      color: var(--gold-accent);
      line-height: 1.2;
    }

    /* 服务卡片 */
    .service-card .service-img {
      height: 0;
      padding-bottom: 56.25%;
      background-color: #e9eef3;
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-xl) var(--radius-xl) 0 0;
      transition: filter 0.3s;
    }
    .service-card:hover .service-img {
      filter: saturate(1.15);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 1rem 0;
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 1rem;
      font-weight: 700;
      cursor: pointer;
      color: var(--deep-blue);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s;
      color: #475569;
      padding-left: 2.8rem;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 0.6rem;
      padding-bottom: 0.6rem;
    }

    /* 页脚 */
    .footer {
      background: var(--deep-blue);
      color: rgba(255,255,255,0.8);
    }

    @media (max-width: 1024px) {
      .nav-menu {
        gap: 1.2rem;
      }
    }

    @media (max-width: 768px) {
      .navbar {
        display: none;
      }
      .mobile-bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 -4px 14px rgba(0,0,0,0.06);
        justify-content: space-around;
        padding: 8px 0 12px;
        z-index: 999;
        border-radius: 24px 24px 0 0;
      }
      .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 12px;
        color: #64748B;
        gap: 4px;
      }
      .mobile-nav-item i {
        font-size: 20px;
      }
      .mobile-nav-item.active {
        color: var(--primary-coral);
      }
      .hero {
        min-height: 90vh;
        padding-top: 80px;
        text-align: left;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .grid-cols-3-mobile {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }