/* roulang page: index */
:root {
      --primary-purple: #7B2FF7;
      --accent-cyan: #00E5FF;
      --deep-bg: #0A0E27;
      --card-bg: rgba(10, 14, 39, 0.7);
      --white: #FFFFFF;
      --gray-light: #F0F2F8;
      --gray-mid: #9BA4B5;
      --cta-orange: #FF6B35;
      --text-dark: #1E2235;
      --border-gradient: linear-gradient(135deg, rgba(123,47,247,0.3), rgba(0,229,255,0.3));
      --shadow-card: 0 8px 32px rgba(123,47,247,0.15);
      --shadow-hover: 0 16px 48px rgba(0,229,255,0.25);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-pill: 50px;
      --font-heading: 'Inter', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --font-mono: 'JetBrains Mono', monospace;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Inter', system-ui, -apple-system, sans-serif;
      background-color: var(--deep-bg);
      color: var(--white);
      line-height: 1.6;
      font-size: 16px;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 40px;
    }

    /* 导航栏 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid transparent;
      background-image: linear-gradient(rgba(10,14,39,0.85), rgba(10,14,39,0.85)), linear-gradient(90deg, var(--primary-purple), var(--accent-cyan));
      background-origin: border-box;
      background-clip: padding-box, border-box;
      z-index: 1000;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }

    .logo {
      font-size: 28px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--accent-cyan), var(--primary-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 2px;
      text-decoration: none;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      list-style: none;
    }

    .nav-links a {
      text-decoration: none;
      color: rgba(255,255,255,0.8);
      font-weight: 500;
      font-size: 14px;
      transition: color 0.3s;
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent-cyan);
    }

    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-cyan);
      box-shadow: 0 0 12px var(--accent-cyan);
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
      width: 30px;
      height: 24px;
    }

    .hamburger span {
      display: block;
      height: 3px;
      background: white;
      border-radius: 3px;
      transition: all 0.3s;
    }

    /* 移动端抽屉 */
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -100%;
      width: 80%;
      height: 100vh;
      background: rgba(8, 12, 30, 0.95);
      backdrop-filter: blur(30px);
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 40px;
      transition: right 0.4s ease;
      z-index: 999;
      list-style: none;
    }

    .mobile-drawer.open {
      right: 0;
    }

    .mobile-drawer a {
      color: white;
      font-size: 24px;
      font-weight: 600;
      text-decoration: none;
    }

    /* Hero */
    .hero {
      padding: 160px 0 80px;
      display: flex;
      align-items: center;
      gap: 60px;
      position: relative;
    }

    .hero-content {
      flex: 1;
    }

    .hero h1 {
      font-size: 48px;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 24px;
    }

    .gradient-text {
      background: linear-gradient(135deg, var(--accent-cyan), var(--primary-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero p {
      font-size: 18px;
      color: var(--gray-mid);
      margin-bottom: 36px;
    }

    .hero-visual {
      flex: 1;
      display: flex;
      justify-content: center;
    }

    .hero-visual img {
      max-width: 100%;
      border-radius: 24px;
      filter: drop-shadow(0 0 30px rgba(123,47,247,0.5));
    }

    .scroll-ticker {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(15px);
      padding: 12px 24px;
      border-radius: 40px;
      display: inline-flex;
      gap: 32px;
      font-size: 14px;
      color: rgba(255,255,255,0.9);
      margin-top: 20px;
      white-space: nowrap;
      overflow: hidden;
    }

    /* 指标看板 */
    .metrics {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
      margin: 80px 0;
    }

    .metric-card {
      background: rgba(255,255,255,0.05);
      backdrop-filter: blur(10px);
      border: 1px solid transparent;
      border-image: var(--border-gradient) 1;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      text-align: center;
      transition: all 0.3s;
    }

    .metric-number {
      font-family: var(--font-mono);
      font-size: 40px;
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-cyan), white);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* 服务网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 24px;
      margin-top: 48px;
    }

    .service-card {
      background: rgba(10,14,39,0.6);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      border: 1px solid rgba(123,47,247,0.2);
      transition: all 0.3s;
      position: relative;
      overflow: hidden;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent-cyan);
    }

    .service-icon {
      font-size: 40px;
      margin-bottom: 20px;
      color: var(--accent-cyan);
    }

    .tag-bar {
      display: flex;
      gap: 8px;
      margin-top: 20px;
      opacity: 0;
      transition: 0.3s;
    }

    .service-card:hover .tag-bar {
      opacity: 1;
    }

    .tag {
      background: rgba(0,229,255,0.15);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
    }

    /* 对比模块 */
    .comparison {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      gap: 24px;
      align-items: center;
    }

    .vs-badge {
      font-size: 24px;
      font-weight: 900;
      color: var(--accent-cyan);
    }

    .compare-card {
      background: rgba(255,255,255,0.03);
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .jiuyou-card {
      background: rgba(123,47,247,0.1);
      border: 1px solid var(--accent-cyan);
      box-shadow: 0 0 30px rgba(0,229,255,0.2);
    }

    .progress-bar {
      height: 8px;
      background: #2A2E45;
      border-radius: 4px;
      margin: 12px 0;
    }

    .progress-fill {
      height: 100%;
      border-radius: 4px;
      background: var(--accent-cyan);
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .faq-item {
      padding: 16px 0;
      border-left: 3px solid transparent;
      padding-left: 20px;
      cursor: pointer;
      transition: 0.2s;
    }

    .faq-item.active {
      border-left-color: var(--primary-purple);
    }

    /* CTA */
    .cta-section {
      background: radial-gradient(circle at 30% 30%, #1A1245, #0A0E27);
      padding: 100px 0;
      text-align: center;
    }

    .btn {
      display: inline-block;
      padding: 16px 40px;
      border-radius: 50px;
      font-weight: 600;
      margin: 10px;
      text-decoration: none;
      transition: 0.3s;
    }

    .btn-primary {
      background: var(--cta-orange);
      color: white;
      box-shadow: 0 8px 20px rgba(255,107,53,0.3);
    }

    .btn-ghost {
      border: 1px solid var(--accent-cyan);
      color: var(--accent-cyan);
      background: transparent;
    }

    footer {
      background: #060B1A;
      padding: 60px 0 30px;
    }

    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero { flex-direction: column; }
      .metrics, .services-grid { grid-template-columns: 1fr; }
      .comparison { grid-template-columns: 1fr; }
      .faq-grid { grid-template-columns: 1fr; }
    }