/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #1A3C6D;
      --primary-soft: #1e477a;
      --accent: #0F766E;
      --accent-glow: #38BDF8;
      --bg: #F8FAFC;
      --surface: #FFFFFF;
      --dark-bg: #0F172A;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-card: 0 4px 16px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.1);
      --radius-lg: 12px;
      --radius-md: 8px;
      --transition: 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Inter", sans-serif;
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 自定义滚动条 */
    ::-webkit-scrollbar {
      width: 6px;
    }
    ::-webkit-scrollbar-track {
      background: #f1f5f9;
    }
    ::-webkit-scrollbar-thumb {
      background: #94a3b8;
      border-radius: 3px;
    }
    /* 导航霓虹效果 */
    .nav-link {
      position: relative;
      color: #CBD5E1;
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--accent-glow);
      box-shadow: 0 0 8px var(--accent-glow);
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: white;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-link.active {
      color: white;
    }
    .nav-link.active::after {
      width: 100%;
    }
    /* 卡片 hover 动画 */
    .card-hover {
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      border-radius: var(--radius-lg);
      background: var(--surface);
      box-shadow: var(--shadow-card);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    /* 按钮基础 */
    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: var(--radius-md);
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.2s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: #0f2b4f;
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-md);
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.2s;
    }
    .btn-outline:hover {
      background-color: rgba(26,60,109,0.05);
      transform: scale(1.02);
    }
    .btn-accent {
      background-color: var(--accent);
      color: white;
      border-radius: var(--radius-md);
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.2s;
      border: none;
      cursor: pointer;
    }
    .btn-accent:hover {
      background-color: #0b5d55;
      transform: scale(1.02);
    }
    .btn-light-outline {
      border: 2px solid white;
      color: white;
      background: transparent;
      border-radius: var(--radius-md);
      padding: 12px 28px;
      font-weight: 600;
      transition: all 0.2s;
    }
    .btn-light-outline:hover {
      background: rgba(255,255,255,0.1);
      transform: scale(1.02);
    }
    /* FAQ 折叠 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 0;
      font-weight: 600;
      color: var(--text-main);
      transition: color 0.2s;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: #f1f5f9;
      border-radius: 8px;
      margin-bottom: 8px;
      padding: 0 16px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .faq-icon {
      transition: transform 0.3s;
      color: var(--primary);
      font-size: 20px;
    }
    /* 汉堡菜单 */
    .mobile-menu {
      display: none;
      flex-direction: column;
      background: #0F172A;
      position: absolute;
      top: 64px;
      left: 0;
      width: 100%;
      padding: 16px;
      z-index: 50;
      border-top: 1px solid #1e293b;
    }
    #menu-toggle:checked ~ .mobile-menu {
      display: flex;
    }
    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-menu {
        display: none;
      }
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
      .hero-image {
        margin-top: 24px;
      }
    }
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    @media (min-width: 769px) {
      .mobile-menu, .menu-icon {
        display: none;
      }
    }
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    @media (max-width: 1024px) {
      .masonry-grid {
        column-count: 2;
      }
    }
    @media (max-width: 640px) {
      .masonry-grid {
        column-count: 1;
      }
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
    }