/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #0A1F3F;
      --accent-cyan: #00E5FF;
      --accent-red: #FF4655;
      --bg-light: #F8FAFC;
      --white: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 12px;
      --transition: all 0.3s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }
    }
    /* 导航 */
    .navbar {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,0.95);
      backdrop-filter: blur(8px);
      height: 72px;
      border-bottom: 1px solid rgba(0,0,0,0.02);
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.3px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i {
      color: var(--accent-cyan);
      font-size: 1.8rem;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 1rem;
      transition: var(--transition);
      position: relative;
      padding: 8px 0;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--accent-cyan);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after, .nav-links a.active::after {
      width: 100%;
    }
    .btn-nav {
      background: var(--accent-cyan);
      color: var(--primary) !important;
      padding: 10px 24px !important;
      border-radius: 30px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(0,229,255,0.25);
      transition: var(--transition);
      margin-left: 12px;
    }
    .btn-nav:hover {
      background: #00B8D4;
      box-shadow: 0 6px 20px rgba(0,229,255,0.4);
      transform: translateY(-1px);
    }
    .hamburger {
      display: none;
      font-size: 1.6rem;
      color: var(--primary);
      cursor: pointer;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 24px 0;
        gap: 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .hamburger {
        display: block;
      }
    }
    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 70px 0;
      }
    }
    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
      letter-spacing: -0.4px;
    }
    .section-sub {
      color: var(--text-muted);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto 48px;
    }
    .btn-primary {
      background: var(--accent-cyan);
      color: #0A1F3F;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      display: inline-block;
      text-decoration: none;
      transition: var(--transition);
      box-shadow: 0 6px 18px rgba(0,229,255,0.3);
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: #00B8D4;
      box-shadow: 0 0 24px rgba(0,229,255,0.5);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      display: inline-block;
      text-decoration: none;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-6px);
    }

.animate-float { animation: float 4s ease-in-out infinite; }
      @keyframes float { 0% { transform: translateY(0); } 50% { transform: translateY(-12px); } 100% { transform: translateY(0); } }