/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    
    :root {
      --primary: #6C3CEC;
      --primary-glow: rgba(108, 60, 236, 0.45);
      --accent: #00F0B5;
      --dark: #1A1A1A;
      --darker: #0A0A0A;
      --gray-50: #F8F9FA;
      --gray-100: #F0F0F0;
      --gray-200: #E0E0E0;
      --gray-600: #666666;
      --gray-700: #444444;
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-xs: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --shadow-lg: 0 16px 32px rgba(0,0,0,0.1);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Inter', sans-serif;
      --font-mono: 'DIN Alternate', 'SF Mono', 'Courier New', monospace;
      --nav-height: 76px;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: #FFFFFF;
      color: var(--dark);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 40px;
      padding-right: 40px;
    }

    /* 导航 */
    .nav-blur {
      background: rgba(255,255,255,0.72);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(0,0,0,0.08);
      transition: background 0.25s ease, box-shadow 0.25s ease;
    }
    .nav-scrolled {
      background: rgba(255,255,255,0.9);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }
    .nav-link {
      font-size: 0.875rem;
      font-weight: 500;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--dark);
      position: relative;
      transition: color 0.2s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-link.active {
      color: var(--primary);
    }
    .nav-link.active::before {
      content: '';
      position: absolute;
      left: -12px;
      top: 50%;
      transform: translateY(-50%);
      width: 4px;
      height: 4px;
      background: var(--primary);
      border-radius: 50%;
    }
    .nav-link.active::after {
      width: 100%;
    }

    /* 按钮 */
    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      letter-spacing: 0.02em;
      transition: all 0.2s ease;
      box-shadow: 0 4px 10px rgba(108,60,236,0.3);
      display: inline-block;
      text-align: center;
    }
    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 8px 20px rgba(108,60,236,0.5);
    }
    .btn-outline {
      border: 2px solid var(--dark);
      background: transparent;
      color: var(--dark);
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      letter-spacing: 0.02em;
      transition: all 0.2s ease;
      display: inline-block;
      text-align: center;
    }
    .btn-outline:hover {
      background: rgba(0,0,0,0.05);
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-light {
      background: white;
      color: var(--dark);
      font-weight: 600;
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      transition: 0.2s;
      box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    }
    .btn-light:hover {
      background: #f0f0f0;
      box-shadow: 0 0 18px var(--primary-glow);
    }

    /* 卡片 */
    .card-soft {
      background: #FAFAFA;
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-xs);
      transition: all 0.3s ease;
    }
    .card-soft:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .service-line {
      position: relative;
      padding-left: 24px;
      border-bottom: 1px solid #E0E0E0;
      transition: all 0.2s;
    }
    .service-line::before {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      height: 0;
      width: 4px;
      background: var(--primary);
      transition: height 0.25s ease;
      border-radius: 4px 4px 0 0;
    }
    .service-line:hover::before {
      height: 100%;
    }

    /* FAQ动画 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
    }
    .faq-item.open .faq-answer {
      max-height: 200px;
    }
    .faq-icon {
      transition: transform 0.3s ease;
      color: var(--primary);
    }
    .faq-item.open .faq-icon {
      transform: rotate(45deg);
    }

    /* 滚动动画 */
    .fade-up {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 1024px) {
      .container {
        padding-left: 24px;
        padding-right: 24px;
      }
    }
    @media (max-width: 768px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
      .mobile-menu {
        display: block;
      }
      .desktop-nav {
        display: none;
      }
      .hero-title {
        font-size: 2.5rem;
      }
      .grid-asymmetric {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (min-width: 769px) {
      .mobile-menu {
        display: none;
      }
      .desktop-nav {
        display: flex;
      }
    }