/* roulang page: index */
:root {
      --primary: #6C5CE7;
      --secondary: #00E5FF;
      --dark-bg: #0A0E27;
      --card-bg: rgba(255,255,255,0.05);
      --text-main: rgba(255,255,255,0.92);
      --text-muted: rgba(255,255,255,0.55);
      --glow-primary: 0 0 20px rgba(108,92,231,0.6), 0 0 40px rgba(0,229,255,0.3);
      --glow-secondary: 0 0 15px rgba(0,229,255,0.3);
      --border-light: rgba(255,255,255,0.1);
      --border-glow: rgba(108,92,231,0.5);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: all 0.3s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--dark-bg);
      color: var(--text-main);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(10,14,39,0.85);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(255,255,255,0.05);
      z-index: 1000;
      display: flex;
      align-items: center;
      transition: background 0.3s;
    }
    .nav.scrolled {
      background: rgba(10,14,39,0.95);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 2px;
      color: #fff;
      text-decoration: none;
      white-space: nowrap;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo span {
      color: var(--secondary);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      list-style: none;
    }
    .nav-links a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
      font-size: 15px;
      font-weight: 500;
      transition: color 0.3s;
      letter-spacing: 0.5px;
    }
    .nav-links a:hover {
      color: var(--secondary);
    }
    .nav-cta {
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 14px;
      letter-spacing: 1px;
      cursor: pointer;
      box-shadow: 0 0 15px rgba(108,92,231,0.5);
      transition: var(--transition);
      white-space: nowrap;
      animation: pulse 2.5s infinite;
      text-decoration: none;
      display: inline-block;
    }
    .nav-cta:hover {
      box-shadow: 0 0 30px rgba(108,92,231,0.9);
      background: #7d6ff0;
    }
    @keyframes pulse {
      0% { box-shadow: 0 0 10px rgba(108,92,231,0.4); }
      50% { box-shadow: 0 0 25px rgba(108,92,231,0.7), 0 0 30px rgba(0,229,255,0.3); }
      100% { box-shadow: 0 0 10px rgba(108,92,231,0.4); }
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      width: 25px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: var(--transition);
    }
    /* Hero 分屏 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #0A0E27 0%, #1A1040 100%);
      position: relative;
      overflow: hidden;
      padding-top: 64px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      align-items: center;
      gap: 40px;
      width: 100%;
    }
    .hero-text {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .hero h1 {
      font-size: 36px;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: 2px;
      color: rgba(255,255,255,0.95);
    }
    .hero-sub {
      font-size: 16px;
      color: rgba(255,255,255,0.65);
      max-width: 450px;
      line-height: 1.6;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 14px;
      letter-spacing: 1px;
      cursor: pointer;
      box-shadow: var(--glow-primary);
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
    }
    .btn-primary:hover {
      box-shadow: 0 0 35px rgba(108,92,231,0.9);
      background: #7d6ff0;
      transform: translateY(-2px);
    }
    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.3);
      color: #fff;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 14px;
      letter-spacing: 1px;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
    }
    .btn-ghost:hover {
      border-color: var(--secondary);
      color: var(--secondary);
      box-shadow: var(--glow-secondary);
    }
    .hero-visual {
      position: relative;
      width: 100%;
      height: 500px;
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .hero-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(108,92,231,0.4), rgba(0,229,255,0.15));
      mix-blend-mode: overlay;
      pointer-events: none;
    }
    .hero-glass {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: var(--radius-md);
      width: 70%;
      height: 60%;
      position: relative;
      z-index: 2;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
      animation: float 6s ease-in-out infinite;
    }
    @keyframes float {
      0% { transform: translateY(0px); }
      50% { transform: translateY(-12px); }
      100% { transform: translateY(0px); }
    }
    .particles {
      position: absolute;
      inset: 0;
      pointer-events: none;
      background-image: radial-gradient(circle at 20% 50%, rgba(0,229,255,0.08) 1px, transparent 1px);
      background-size: 40px 40px;
    }
    /* 通用板块标题 */
    .section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 64px;
    }
    .section-title h2 {
      font-size: 28px;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }
    .divider {
      width: 80px;
      height: 3px;
      background: linear-gradient(90deg, transparent, var(--secondary), transparent);
      margin: 16px auto 0;
    }
    /* 玻璃卡片 */
    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: 0 8px 32px rgba(0,0,0,0.3);
      transition: var(--transition);
    }
    .glass-card:hover {
      border-color: var(--border-glow);
      box-shadow: 0 0 30px rgba(108,92,231,0.2);
      transform: translateY(-4px);
    }
    /* 价值主张 3列 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .value-icon {
      font-size: 36px;
      color: var(--secondary);
      margin-bottom: 16px;
    }
    .value-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .value-card p {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.6;
    }
    /* 2x3 网格 */
    .grid-2x3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }
    .service-icon {
      font-size: 28px;
      color: var(--secondary);
      flex-shrink: 0;
    }
    .service-text h3 {
      font-weight: 600;
      margin-bottom: 6px;
    }
    .service-text p {
      color: var(--text-muted);
      font-size: 14px;
    }
    /* 场景卡片 */
    .scene-card {
      background: rgba(10,14,39,0.8);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
    }
    .scene-img {
      height: 160px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .scene-body {
      padding: 24px;
    }
    /* 案例 */
    .case-row {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .case-item {
      display: flex;
      gap: 24px;
      align-items: center;
      background: rgba(255,255,255,0.02);
      padding: 24px;
      border-radius: var(--radius-md);
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }
    .case-item:hover {
      border-bottom-color: var(--primary);
    }
    .case-logo {
      width: 64px;
      height: 64px;
      background: rgba(255,255,255,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 24px;
      color: var(--secondary);
    }
    .case-stat {
      font-size: 32px;
      font-weight: 800;
      color: var(--secondary);
      margin-right: 8px;
    }
    /* 价格卡 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }
    .price-card {
      background: var(--card-bg);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 40px 24px;
      text-align: center;
      transition: var(--transition);
    }
    .price-card.featured {
      border-color: var(--primary);
      box-shadow: 0 0 30px rgba(108,92,231,0.3);
      position: relative;
      transform: scale(1.02);
    }
    .badge {
      background: var(--primary);
      color: #fff;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 700;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
    }
    .price {
      font-size: 40px;
      font-weight: 800;
      color: var(--secondary);
      margin: 16px 0;
    }
    .feature-list {
      list-style: none;
      text-align: left;
      margin: 24px 0;
      color: var(--text-muted);
    }
    .feature-list li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 16px 0;
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 18px;
      color: #fff;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-muted);
      padding-right: 40px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    .faq-icon {
      color: var(--secondary);
      font-size: 24px;
    }
    /* CTA Banner */
    .cta-banner {
      background: #060A1A url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      padding: 80px 24px;
      text-align: center;
      position: relative;
    }
    .cta-banner::before {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(10,14,39,0.85);
    }
    .cta-content {
      position: relative;
      z-index: 1;
    }
    .btn-xl {
      padding: 18px 48px;
      font-size: 16px;
      background: var(--primary);
      color: #fff;
      border: none;
      border-radius: var(--radius-sm);
      font-weight: 700;
      letter-spacing: 1px;
      box-shadow: var(--glow-primary);
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      display: inline-block;
    }
    .btn-xl:hover {
      box-shadow: 0 0 40px rgba(108,92,231,0.9);
    }
    /* Footer */
    .footer {
      background: #060A1A;
      padding: 60px 0 30px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }
    .footer a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.3s;
    }
    .footer a:hover {
      color: var(--secondary);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr 1fr;
      }
      .grid-3, .grid-2x3, .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-menu {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: rgba(10,14,39,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 32px;
        gap: 24px;
        display: none;
        z-index: 999;
      }
      .mobile-menu.active {
        display: flex;
      }
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-visual {
        height: 300px;
      }
      .grid-3, .grid-2x3, .pricing-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .section {
        padding: 60px 0;
      }
      .case-item {
        flex-direction: column;
        align-items: flex-start;
      }
    }