/* roulang page: index */
:root {
      --primary: #7C3AED;
      --primary-light: #8B5CF6;
      --secondary: #06B6D4;
      --accent: #F97316;
      --accent-light: #FB923C;
      --bg-deep: #0A0A0F;
      --bg-card: #12121A;
      --bg-input: #1A1A25;
      --text-body: #A0A0B0;
      --text-muted: #707080;
      --border-glow: rgba(124, 58, 237, 0.25);
      --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.15);
      --shadow-glow-hover: 0 0 50px rgba(124, 58, 237, 0.35);
      --radius-card: 16px;
      --radius-btn: 8px;
      --font-sans: "Inter", "SF Pro Display", -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
    }
    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: #ffffff;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    button, input, textarea {
      font-family: inherit;
      outline: none;
    }
    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    @media (max-width: 768px) {
      .container-custom {
        padding: 0 20px;
      }
    }
    /* 导航栏样式 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      transition: background-color 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
      background-color: transparent;
    }
    .navbar.scrolled {
      background-color: rgba(10, 10, 15, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(124, 58, 237, 0.3);
    }
    .nav-link {
      font-weight: 500;
      color: #B0B0C0;
      transition: color 0.2s;
      position: relative;
      padding: 4px 0;
    }
    .nav-link:hover {
      color: #ffffff;
    }
    .nav-link.active {
      color: #ffffff;
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--secondary);
      border-radius: 1px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 10px 22px;
      font-weight: 600;
      transition: var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: var(--primary-light);
      box-shadow: 0 0 20px rgba(124, 58, 237, 0.6);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--secondary);
      color: var(--secondary);
      border-radius: var(--radius-btn);
      padding: 10px 22px;
      font-weight: 600;
      transition: var(--transition-smooth);
      cursor: pointer;
    }
    .btn-outline:hover {
      background: rgba(6, 182, 212, 0.1);
    }
    .btn-accent {
      background-color: var(--accent);
      color: white;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-weight: 700;
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
    }
    .btn-accent:hover {
      background-color: var(--accent-light);
      box-shadow: 0 0 25px rgba(249, 115, 22, 0.5);
    }
    .card-glow {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      transition: var(--transition-smooth);
      box-shadow: var(--shadow-glow);
    }
    .card-glow:hover {
      transform: translateY(-4px);
      border-color: rgba(6, 182, 212, 0.5);
      box-shadow: var(--shadow-glow-hover);
    }
    .section-title {
      font-weight: 700;
      font-size: clamp(2rem, 5vw, 2.5rem);
      position: relative;
      display: inline-block;
      margin-bottom: 16px;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 4px;
      background: var(--secondary);
      border-radius: 2px;
    }
    .text-glow {
      text-shadow: 0 0 15px rgba(124, 58, 237, 0.7);
    }
    .input-field {
      background: var(--bg-input);
      border: 1px solid rgba(124, 58, 237, 0.3);
      border-radius: 8px;
      padding: 12px 16px;
      color: white;
      width: 100%;
      transition: 0.2s;
    }
    .input-field:focus {
      border-color: var(--secondary);
      box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.25);
    }
    /* 动画定义 */
    @keyframes countUp {
      0% { opacity: 0; transform: translateY(10px); }
      100% { opacity: 1; transform: translateY(0); }
    }
    .count-animate {
      animation: countUp 0.8s ease-out forwards;
    }
    @keyframes pulse-glow {
      0% { box-shadow: 0 0 5px rgba(6,182,212,0.4); }
      50% { box-shadow: 0 0 25px rgba(6,182,212,0.8); }
      100% { box-shadow: 0 0 5px rgba(6,182,212,0.4); }
    }
    .hover\:pulse-glow:hover {
      animation: pulse-glow 1.5s infinite;
    }
    /* 汉堡菜单 */
    .mobile-menu {
      display: none;
    }
    @media (max-width: 768px) {
      .desktop-nav {
        display: none;
      }
      .mobile-menu {
        display: block;
      }
    }