/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --cloud-blue: #2B5F8A;
      --deep-blue: #1A3A5C;
      --warm-gold: #C9A96E;
      --rock-gray: #4A5568;
      --silver-gray: #A0AEC0;
      --bg-light: #FAFBFD;
      --bg-slate: #F1F5F9;
      --card-white: #FFFFFF;
      --border-light: #E2E8F0;
      --success-green: #38A169;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.06);
      --shadow-hover: 0 2px 8px rgba(0,0,0,0.08), 0 8px 24px rgba(0,0,0,0.10);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", -apple-system, sans-serif;
      --font-mono: "JetBrains Mono", "SF Mono", monospace;
      --radius-card: 12px;
      --radius-btn: 8px;
      --transition-smooth: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--rock-gray);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    @media (max-width: 1024px) {
      .container {
        padding: 0 28px;
      }
    }
    @media (max-width: 640px) {
      .container {
        padding: 0 20px;
      }
    }
    /* 导航栏 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 4px rgba(0,0,0,0.04);
      height: 64px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      align-items: center;
      width: 100%;
      justify-content: space-between;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 20px;
      color: var(--deep-blue);
      letter-spacing: -0.2px;
      text-decoration: none;
    }
    .logo-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      background: var(--cloud-blue);
      border-radius: 8px;
      color: white;
      font-size: 18px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--rock-gray);
      text-decoration: none;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--cloud-blue);
      font-weight: 600;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--cloud-blue);
      transition: width 0.25s ease;
      border-radius: 4px;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: var(--bg-slate);
      border-radius: 9999px;
      padding: 8px 16px;
      width: 180px;
      transition: width 0.3s ease;
      border: 1px solid transparent;
    }
    .search-box:focus-within {
      width: 240px;
      border-color: var(--cloud-blue);
      background: white;
    }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 14px;
      width: 100%;
      color: var(--deep-blue);
    }
    .search-box input::placeholder {
      color: var(--silver-gray);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 15px;
      padding: 10px 20px;
      border-radius: var(--radius-btn);
      transition: var(--transition-smooth);
      text-decoration: none;
      cursor: pointer;
      border: 2px solid transparent;
      background: transparent;
      color: var(--cloud-blue);
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--cloud-blue);
      color: white;
      border: 2px solid var(--cloud-blue);
      box-shadow: 0 2px 6px rgba(43,95,138,0.25);
    }
    .btn-primary:hover {
      background: var(--deep-blue);
      border-color: var(--deep-blue);
      box-shadow: 0 6px 14px rgba(26,58,92,0.3);
      transform: translateY(-1px);
    }
    .btn-outline {
      border: 2px solid var(--cloud-blue);
      color: var(--cloud-blue);
      background: transparent;
    }
    .btn-outline:hover {
      background: rgba(43,95,138,0.06);
      border-color: var(--deep-blue);
      color: var(--deep-blue);
    }
    .btn-ghost {
      border: 1.5px solid rgba(255,255,255,0.65);
      color: white;
    }
    .btn-ghost:hover {
      background: rgba(255,255,255,0.12);
      border-color: white;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2.5px;
      background: var(--deep-blue);
      border-radius: 4px;
      transition: 0.3s;
    }
    @media (max-width: 1024px) {
      .nav-links, .search-box, .desktop-cta {
        display: none;
      }
      .hamburger {
        display: flex;
      }
    }
    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 64px;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.98);
      backdrop-filter: blur(16px);
      padding: 24px;
      display: none;
      flex-direction: column;
      gap: 20px;
      z-index: 40;
      box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }
    .mobile-menu.active {
      display: flex;
    }
    .mobile-menu a {
      font-size: 18px;
      font-weight: 500;
      color: var(--deep-blue);
      text-decoration: none;
      padding: 8px 0;
    }
    section {
      padding: 100px 0;
    }
    @media (max-width: 640px) {
      section {
        padding: 70px 0;
      }
    }
    .card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: var(--transition-smooth);
      padding: 32px;
      height: 100%;
    }
    .card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: var(--cloud-blue);
    }
    .data-number {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 32px;
      color: var(--warm-gold);
    }
    .section-title {
      font-size: 36px;
      font-weight: 600;
      color: var(--deep-blue);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .fade-up {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }
    footer {
      background: var(--deep-blue);
      color: #CBD5E0;
      padding: 60px 0 30px;
    }
    footer a {
      color: #CBD5E0;
      text-decoration: none;
    }
    footer a:hover {
      color: white;
    }