/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');

    :root {
      --teal-600: #0D9488;
      --teal-700: #0F766E;
      --teal-800: #115E59;
      --teal-900: #134E4A;
      --teal-50: #F0FDFA;
      --teal-100: #CCFBF1;
      --slate-50: #F8FAFC;
      --slate-100: #F1F5F9;
      --slate-200: #E2E8F0;
      --slate-300: #CBD5E1;
      --slate-400: #94A3B8;
      --slate-500: #64748B;
      --slate-600: #475569;
      --slate-700: #334155;
      --slate-800: #1E293B;
      --slate-900: #0F172A;
      --orange-400: #FB923C;
      --orange-500: #F97316;
      --orange-600: #EA580C;
      --white: #FFFFFF;
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
      --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
      --radius-lg: 12px;
      --radius-md: 8px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Inter', sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 80px;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--slate-50);
      color: var(--slate-800);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

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

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

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background-color: rgba(255,255,255,0.8);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid transparent;
      transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
      padding: 1rem 0;
    }

    .navbar.scrolled {
      background-color: rgba(255,255,255,0.95);
      border-bottom-color: var(--slate-200);
      box-shadow: var(--shadow-md);
      backdrop-filter: blur(16px);
    }

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

    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--teal-700);
      letter-spacing: -0.5px;
      white-space: nowrap;
    }

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

    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--slate-600);
      padding-bottom: 4px;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--teal-600);
      border-bottom-color: var(--teal-600);
    }

    .mega-trigger {
      position: relative;
      cursor: pointer;
      color: var(--slate-600);
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 0.5rem 0;
    }

    .mega-trigger:hover {
      color: var(--teal-600);
    }

    .mega-panel {
      position: absolute;
      top: 100%;
      right: 0;
      margin-top: 1rem;
      background: var(--white);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-xl);
      padding: 1.5rem;
      display: none;
      grid-template-columns: repeat(3, minmax(0, auto));
      gap: 2rem;
      min-width: 520px;
      border: 1px solid var(--slate-100);
      z-index: 60;
    }

    .mega-trigger:focus-within .mega-panel,
    .mega-trigger:hover .mega-panel {
      display: grid;
    }

    .mega-col h4 {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--slate-500);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 0.75rem;
    }

    .mega-col a {
      display: block;
      font-size: 0.9rem;
      color: var(--slate-700);
      padding: 0.3rem 0;
      transition: color 0.2s;
      white-space: nowrap;
    }

    .mega-col a:hover {
      color: var(--teal-600);
    }

    .hamburger {
      display: none;
      font-size: 1.5rem;
      color: var(--slate-700);
      background: none;
      border: none;
      cursor: pointer;
      padding: 0.25rem;
    }

    .mobile-menu {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      background: var(--white);
      border-top: 1px solid var(--slate-200);
      box-shadow: var(--shadow-lg);
      flex-direction: column;
      padding: 1.5rem;
      gap: 0.8rem;
    }

    .mobile-menu a {
      font-size: 1rem;
      font-weight: 500;
      color: var(--slate-700);
      padding: 0.5rem 0;
      border-bottom: 1px solid var(--slate-100);
    }

    /* Hero */
    .hero-section {
      padding-top: 7rem;
      padding-bottom: 4rem;
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, var(--slate-50) 0%, #f0fdfa 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-bg-svg {
      position: absolute;
      right: 0;
      bottom: 0;
      width: 60%;
      opacity: 0.06;
      pointer-events: none;
    }

    .btn-primary {
      background-color: var(--orange-500);
      color: white;
      font-weight: 600;
      padding: 0.75rem 2rem;
      border-radius: var(--radius-md);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background-color 0.2s, transform 0.1s;
      border: none;
      cursor: pointer;
      font-size: 1rem;
    }

    .btn-primary:hover {
      background-color: var(--orange-600);
      transform: translateY(-1px);
    }

    .btn-outline {
      background-color: transparent;
      color: var(--teal-700);
      font-weight: 600;
      padding: 0.75rem 2rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--teal-300);
      background-color: var(--teal-50);
      transition: background-color 0.2s, border-color 0.2s;
      display: inline-flex;
      align-items: center;
    }

    .btn-outline:hover {
      background-color: var(--teal-100);
      border-color: var(--teal-500);
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--slate-800);
      margin-bottom: 1rem;
      line-height: 1.3;
    }

    .section-subtitle {
      color: var(--slate-500);
      font-size: 1.1rem;
      max-width: 640px;
    }

    .card {
      background: var(--white);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--slate-100);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
    }

    .stat-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--orange-400);
    }

    .faq-details {
      border-bottom: 1px solid var(--slate-200);
      padding: 1.2rem 0;
    }

    .faq-summary {
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--slate-800);
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 0.75rem;
      list-style: none;
    }

    .faq-summary::-webkit-details-marker {
      display: none;
    }

    .faq-summary i {
      color: var(--teal-500);
      font-size: 1.2rem;
      transition: transform 0.2s;
    }

    details[open] .faq-summary i {
      transform: rotate(45deg);
    }

    .faq-content {
      color: var(--slate-600);
      padding: 0.75rem 0 0 2rem;
      line-height: 1.7;
    }

    footer {
      background-color: var(--slate-900);
      color: var(--slate-400);
    }

    @media (max-width: 1024px) {
      .nav-links .nav-link,
      .mega-trigger {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .mobile-menu.active {
        display: flex;
      }
    }

    @media (max-width: 768px) {
      .section-title {
        font-size: 1.8rem;
      }
      .hero-section {
        flex-direction: column;
        text-align: center;
        padding-top: 6rem;
      }
      .grid-cols-2,
      .grid-cols-3,
      .grid-cols-4 {
        grid-template-columns: 1fr;
      }
      footer .grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
      }
    }