/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #1A3C5E;
      --primary-deep: #0F2640;
      --primary-hover: #152E4A;
      --accent: #C59B5F;
      --bg: #F8F9FA;
      --card-bg: #FFFFFF;
      --text: #333333;
      --text-light: #6B7280;
      --border: #E5E7EB;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(26,60,94,0.12);
      --radius: 12px;
      --radius-btn: 8px;
      --transition: 0.3s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Inter', sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: 8px;
      border: 1px solid var(--border);
    }
    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: var(--transition);
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: #FFFFFF;
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      z-index: 50;
      display: flex;
      align-items: center;
    }
    .nav-link {
      color: #333;
      font-weight: 500;
      margin-left: 32px;
      transition: color 0.2s;
      position: relative;
      white-space: nowrap;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }
    .btn-primary {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      font-weight: 600;
      letter-spacing: 0.5px;
      padding: 12px 28px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 8px 20px rgba(26,60,94,0.2);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      font-weight: 600;
      letter-spacing: 0.5px;
      padding: 12px 28px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
      white-space: nowrap;
    }
    .btn-outline:hover {
      background: rgba(26,60,94,0.05);
      border-color: var(--primary-hover);
      color: var(--primary-hover);
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      border-radius: var(--radius-btn);
      font-weight: 600;
      padding: 16px 48px;
      font-size: 18px;
      letter-spacing: 0.5px;
      border: none;
      transition: var(--transition);
    }
    .btn-accent:hover {
      background: #b3874a;
      box-shadow: 0 12px 28px rgba(197,155,95,0.3);
      transform: translateY(-2px);
    }
    .card {
      background: var(--card-bg);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      padding: 32px;
      transition: var(--transition);
      height: 100%;
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .mobile-menu {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(26,60,94,0.97);
      z-index: 60;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 24px;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }
    .mobile-menu.open {
      display: flex;
      opacity: 1;
      pointer-events: auto;
    }
    .mobile-menu a {
      color: white;
      font-size: 18px;
      font-weight: 500;
      transition: color 0.2s;
    }
    .mobile-menu a:hover {
      color: var(--accent);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      transition: 0.2s;
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .hamburger { display: flex; }
      .header .container { justify-content: space-between; }
      .btn-primary.nav-cta { display: none; }
    }
    /* 区块间距 */
    section {
      padding-top: 100px;
      padding-bottom: 100px;
    }
    @media (max-width: 768px) {
      section {
        padding-top: 60px;
        padding-bottom: 60px;
      }
    }
    .hero-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-overlay {
      background: linear-gradient(90deg, rgba(248,249,250,0.92) 0%, rgba(248,249,250,0.7) 60%, rgba(248,249,250,0.4) 100%);
    }
    .faq-item {
      border-bottom: 1px solid var(--border);
      background: var(--card-bg);
      padding: 20px;
      cursor: pointer;
      transition: background 0.2s;
    }
    .faq-item:hover {
      background: #fdfdfd;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      background: var(--bg);
      border-radius: 0 0 8px 8px;
      padding-left: 20px;
      padding-right: 20px;
    }
    .faq-item.open .faq-answer {
      max-height: 300px;
      padding-top: 20px;
      padding-bottom: 20px;
    }
    .faq-icon {
      transition: transform 0.3s ease;
      font-size: 18px;
      color: var(--primary);
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }
    .footer {
      background-color: var(--primary-deep);
      color: #CBD5E1;
      padding-top: 60px;
      padding-bottom: 0;
    }
    .footer a:hover {
      color: var(--accent);
    }
    .footer-title {
      color: white;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .copyright {
      background: #0A1A2E;
      color: #9CA3AF;
      padding: 20px 0;
      margin-top: 40px;
      text-align: center;
      font-size: 14px;
    }