/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary-cyan: #00F0FF;
      --deep-blue: #0A0E27;
      --purple-accent: #7B2FFF;
      --card-bg: rgba(15, 25, 50, 0.6);
      --glass-border: rgba(0, 240, 255, 0.15);
      --glass-border-hover: rgba(0, 240, 255, 0.5);
      --text-soft: #B0C4DE;
      --text-muted: #6B7FA3;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-glow: 0 12px 40px rgba(0, 240, 255, 0.15);
      --radius-lg: 16px;
      --radius-btn: 50px;
      --transition-smooth: all 0.3s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: 'Inter', 'SF Pro', 'PingFang SC', system-ui, -apple-system, sans-serif;
      background-color: var(--deep-blue);
      color: #ffffff;
      line-height: 1.7;
      font-weight: 400;
      background-image: radial-gradient(circle at 20% 10%, rgba(123, 47, 255, 0.12) 0%, transparent 35%),
                        radial-gradient(circle at 80% 70%, rgba(0, 240, 255, 0.08) 0%, transparent 40%),
                        repeating-linear-gradient(0deg, rgba(0, 240, 255, 0.03) 0px, rgba(0, 240, 255, 0.03) 1px, transparent 1px, transparent 2px);
      background-attachment: fixed;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.12);
      padding: 12px 0;
      transition: var(--transition-smooth);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .logo-text {
      font-size: 1.8rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: #ffffff;
      text-shadow: 0 0 15px var(--primary-cyan);
      white-space: nowrap;
    }
    .search-box {
      display: flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(0, 240, 255, 0.25);
      border-radius: 50px;
      padding: 10px 20px;
      width: 360px;
      transition: var(--transition-smooth);
    }
    .search-box i {
      color: var(--primary-cyan);
      margin-right: 10px;
      font-size: 1rem;
    }
    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      color: white;
      width: 100%;
      font-size: 0.95rem;
    }
    .search-box input::placeholder {
      color: var(--text-muted);
      font-weight: 400;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: var(--text-soft);
      text-decoration: none;
      font-weight: 500;
      font-size: 1rem;
      transition: var(--transition-smooth);
      position: relative;
      padding-bottom: 4px;
    }
    .nav-links a:hover {
      color: var(--primary-cyan);
      text-shadow: 0 0 8px rgba(0,240,255,0.6);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary-cyan);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: white;
      cursor: pointer;
    }
    @media (max-width: 1024px) {
      .search-box {
        width: 240px;
      }
    }
    @media (max-width: 768px) {
      .nav-links, .search-box {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .nav-container {
        flex-wrap: wrap;
      }
      .mobile-menu {
        display: flex;
        flex-direction: column;
        width: 100%;
        background: rgba(10,14,39,0.95);
        padding: 20px;
        margin-top: 12px;
        border-radius: 24px;
        backdrop-filter: blur(20px);
      }
      .mobile-menu .search-box {
        display: flex;
        width: 100%;
        margin-bottom: 16px;
      }
      .mobile-menu .nav-links {
        display: flex;
        flex-direction: column;
        gap: 18px;
      }
    }
    /* 通用卡片 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }
    .glass-card:hover {
      border-color: var(--glass-border-hover);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-cyan), var(--purple-accent));
      color: #0A0E27;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      cursor: pointer;
      box-shadow: 0 0 20px rgba(0,240,255,0.5);
      transition: var(--transition-smooth);
      display: inline-block;
      text-align: center;
      letter-spacing: 0.3px;
    }
    .btn-primary:hover {
      box-shadow: 0 0 35px rgba(0,240,255,0.8);
      transform: scale(1.03);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary-cyan);
      color: var(--primary-cyan);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      cursor: pointer;
      transition: var(--transition-smooth);
    }
    .btn-outline:hover {
      background: rgba(0,240,255,0.1);
      border-color: white;
      color: white;
    }
    h1 {
      font-size: 56px;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }
    h2 {
      font-size: 40px;
      font-weight: 700;
    }
    h3 {
      font-size: 24px;
      font-weight: 600;
    }
    @media (max-width: 768px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      h3 { font-size: 20px; }
    }
    .text-soft { color: var(--text-soft); }
    .text-muted { color: var(--text-muted); }
    section {
      padding: 100px 0;
    }
    @media (max-width: 768px) {
      section { padding: 70px 0; }
    }
    /* 动画 */
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-6px); }
      100% { transform: translateY(0px); }
    }
    .float-anim {
      animation: float 4s infinite ease-in-out;
    }
    .delay-1 { animation-delay: 0.5s; }
    .delay-2 { animation-delay: 1.2s; }