/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #0AEFFF;
      --primary-dark: #00C8DB;
      --accent: #FF6B35;
      --accent-dark: #E55A2B;
      --dark: #1A1D2E;
      --bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --border-light: #E2E8F0;
      --text-secondary: #475569;
      --text-muted: #64748B;
      --shadow-sm: 0 4px 16px rgba(26,29,46,0.06);
      --shadow-md: 0 8px 24px rgba(26,29,46,0.12);
    }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: var(--bg);
      color: var(--text-secondary);
      line-height: 1.7;
      letter-spacing: normal;
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    *, *::before, *::after {
      box-sizing: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input, textarea {
      font-family: inherit;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    .section-py {
      padding-top: 5rem;
      padding-bottom: 5rem;
    }
    @media (max-width: 768px) {
      .section-py {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
      }
    }
    .text-gradient {
      background: linear-gradient(135deg, var(--primary) 0%, #00B8D4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .card-hover {
      transition: all 0.3s ease;
      border: 1px solid var(--border-light);
      background: var(--card-bg);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: transparent;
    }
    .btn-primary {
      background-color: var(--primary);
      color: var(--dark);
      font-weight: 600;
      border-radius: 8px;
      padding: 12px 28px;
      transition: all 0.2s ease;
      display: inline-block;
      text-align: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 8px 18px rgba(10,239,255,0.3);
      transform: scale(1.02);
    }
    .btn-secondary {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      border-radius: 8px;
      padding: 10px 26px;
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
    }
    .btn-secondary:hover {
      background-color: rgba(10,239,255,0.1);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }
    .btn-accent {
      background-color: var(--accent);
      color: white;
      font-weight: 600;
      border-radius: 8px;
      padding: 14px 32px;
      transition: all 0.2s ease;
      border: none;
      cursor: pointer;
      display: inline-block;
      text-align: center;
    }
    .btn-accent:hover {
      background-color: var(--accent-dark);
      transform: scale(1.03);
      box-shadow: 0 10px 20px rgba(255,107,53,0.35);
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--dark);
      text-align: center;
      margin-bottom: 0.5rem;
      line-height: 1.3;
    }
    .title-decoration {
      width: 48px;
      height: 4px;
      background-color: var(--primary);
      margin: 0.25rem auto 2.5rem auto;
      border-radius: 4px;
    }
    .metric-number {
      font-size: 3.5rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
    }
    @media (max-width: 768px) {
      .metric-number {
        font-size: 2.5rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      background: var(--card-bg);
      transition: background 0.2s;
    }
    .faq-question {
      font-weight: 600;
      color: var(--dark);
      padding: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.2s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      padding-left: 16px;
      padding-right: 16px;
      color: var(--text-secondary);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 16px;
      padding-top: 8px;
      background: white;
    }
    .faq-item.active .faq-question {
      color: var(--primary-dark);
      border-left: 3px solid var(--primary);
      padding-left: 13px;
    }
    .particle-bg {
      position: absolute;
      top:0; left:0; width:100%; height:100%;
      background: radial-gradient(circle at 20% 30%, rgba(10,239,255,0.15) 0%, transparent 40%),
                  radial-gradient(circle at 80% 70%, rgba(255,107,53,0.1) 0%, transparent 45%);
      pointer-events: none;
    }
    .sticky-nav {
      position: sticky;
      top: 0;
      z-index: 50;
      background: white;
      border-bottom: 1px solid var(--border-light);
    }
    .mobile-menu {
      display: none;
    }
    @media (max-width: 768px) {
      .desktop-nav-links {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
    }

@keyframes float { 0%{transform:translateY(0px);} 50%{transform:translateY(-12px);} 100%{transform:translateY(0px);} }