/* roulang page: index */
@import url('/assets/css/vendor/0b67347532-css2.css');
    
    :root {
      --primary: #1A5F7A;
      --primary-hover: #154E66;
      --primary-light: rgba(26, 95, 122, 0.08);
      --accent: #F28C38;
      --accent-hover: #d9772c;
      --accent-light: #FFF7ED;
      --bg: #F7F9FC;
      --surface: #FFFFFF;
      --text-main: #1E293B;
      --text-secondary: #475569;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --success: #10B981;
      --end-tag: #94A3B8;
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 4px 12px rgba(0,0,0,0.04), 0 2px 6px rgba(0,0,0,0.03);
      --shadow-hover: 0 20px 35px rgba(0,0,0,0.08), 0 6px 12px rgba(0,0,0,0.04);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, sans-serif;
      --spacing-section: 80px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text-main);
      margin: 0;
      padding: 0;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s ease;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      transition: all 0.2s ease;
      border: none;
      outline: none;
    }

    button:focus-visible, a:focus-visible, .btn:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
      border-radius: var(--radius-sm);
    }

    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    @media (max-width: 768px) {
      .container {
        padding-left: 1rem;
        padding-right: 1rem;
      }
      :root {
        --spacing-section: 60px;
      }
    }

    /* 导航 */
    .navbar {
      position: sticky;
      top: 0;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      height: 68px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--border);
      z-index: 50;
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
      transition: all 0.3s;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .logo {
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: 1.5px;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo-icon {
      font-size: 1.8rem;
      line-height: 1;
      color: var(--accent);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }

    .nav-link {
      font-weight: 500;
      color: var(--text-secondary);
      font-size: 0.95rem;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }

    .nav-link:hover {
      color: var(--primary);
    }

    .nav-link.active {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
    }

    .btn-primary {
      background: var(--accent);
      color: white;
      font-weight: 600;
      padding: 0.6rem 1.5rem;
      border-radius: var(--radius-btn);
      box-shadow: 0 2px 8px rgba(242,140,56,0.25);
      letter-spacing: 0.3px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      white-space: nowrap;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 6px 16px rgba(242,140,56,0.35);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 0.6rem 1.5rem;
      border-radius: var(--radius-btn);
    }
    .btn-outline:hover {
      background: var(--primary-light);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      width: 24px;
      height: 2.5px;
      background: var(--text-main);
      border-radius: 3px;
      transition: 0.2s;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 68px;
      left: 0;
      width: 100%;
      height: calc(100vh - 68px);
      background: white;
      flex-direction: column;
      padding: 2rem 1.5rem;
      gap: 1.8rem;
      z-index: 40;
      box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      align-items: flex-start;
    }
    .mobile-menu.open {
      display: flex;
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
    }

    /* Hero */
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 2.5rem;
      align-items: center;
      min-height: 520px;
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 20px;
      min-height: 360px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.2);
      position: relative;
      overflow: hidden;
    }
    .hero-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(26,95,122,0.25) 0%, rgba(0,0,0,0.05) 100%);
    }

    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .hero-image {
        min-height: 260px;
        order: -1;
      }
    }

    .data-points {
      display: flex;
      gap: 2rem;
      flex-wrap: wrap;
    }
    .data-point {
      text-align: left;
    }
    .data-number {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--accent);
    }

    /* 卡片通用 */
    .card {
      background: var(--surface);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 1.8rem;
      transition: all 0.25s;
    }
    .card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      text-align: center;
      margin-bottom: 0.5rem;
      color: var(--text-main);
      position: relative;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 48px;
      height: 4px;
      background: var(--accent);
      margin: 0.8rem auto 0;
      border-radius: 2px;
    }

    /* 瀑布流 */
    .masonry {
      columns: 3;
      column-gap: 1.5rem;
    }
    @media (max-width: 1024px) { .masonry { columns: 2; } }
    @media (max-width: 640px) { .masonry { columns: 1; } }

    .event-card {
      break-inside: avoid;
      margin-bottom: 1.5rem;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: 0.2s;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border);
    }
    .faq-question {
      width: 100%;
      background: none;
      padding: 1.2rem 0;
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--text-main);
      align-items: center;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-secondary);
      padding-right: 1rem;
    }

    footer {
      background: #1E293B;
      color: #CBD5E1;
    }