/* roulang page: index */
:root {
      --neon-purple: #A855F7;
      --electric-cyan: #06B6D4;
      --deep-bg: #0A0A0A;
      --panel-bg: rgba(20, 20, 30, 0.8);
      --text-primary: #F5F5F5;
      --text-secondary: #B0B0C0;
      --border-dim: rgba(168, 85, 247, 0.25);
      --glow-purple: 0 0 20px rgba(168, 85, 247, 0.4);
      --glow-cyan: 0 0 15px rgba(6, 182, 212, 0.5);
      --radius-card: 16px;
      --radius-btn: 8px;
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
      --font-display: 'Orbitron', 'Noto Sans SC', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', sans-serif;
      --container-padding: 1.5rem;
    }
    
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    
    body {
      background-color: var(--deep-bg);
      color: var(--text-primary);
      font-family: var(--font-body);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    
    /* 自定义网格纹理背景 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: 
        linear-gradient(rgba(168, 85, 247, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(168, 85, 247, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      z-index: -1;
    }
    
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 var(--container-padding);
    }
    
    /* 导航 */
    #nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 10, 10, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 2px solid transparent;
      background-clip: padding-box;
      z-index: 1000;
      transition: var(--transition-smooth);
    }
    
    #nav::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--neon-purple), var(--electric-cyan));
      z-index: 2;
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.8rem 0;
      flex-wrap: wrap;
    }
    
    .logo {
      font-family: var(--font-display);
      font-weight: 900;
      font-size: 1.8rem;
      letter-spacing: 2px;
      background: linear-gradient(135deg, var(--neon-purple), var(--electric-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      text-decoration: none;
    }
    
    .logo i {
      background: none;
      -webkit-text-fill-color: var(--electric-cyan);
      font-size: 2rem;
    }
    
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 600;
      font-size: 1rem;
      position: relative;
      padding: 0.3rem 0;
      transition: color 0.2s;
    }
    
    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--electric-cyan);
      transition: width 0.3s ease;
      box-shadow: var(--glow-cyan);
    }
    
    .nav-links a:hover {
      color: white;
    }
    
    .nav-links a:hover::after {
      width: 100%;
    }
    
    .btn-primary {
      background: linear-gradient(135deg, var(--neon-purple), var(--electric-cyan));
      border: none;
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
      color: white;
      cursor: pointer;
      font-family: var(--font-display);
      letter-spacing: 1px;
      transition: var(--transition-smooth);
      box-shadow: 0 0 15px rgba(168, 85, 247, 0.5);
      text-decoration: none;
      display: inline-block;
    }
    
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 0 30px rgba(6, 182, 212, 0.7);
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--neon-purple);
      padding: 0.65rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      color: var(--text-primary);
      cursor: pointer;
      transition: var(--transition-smooth);
      text-decoration: none;
    }
    
    .btn-outline:hover {
      background: var(--neon-purple);
      border-color: var(--neon-purple);
      color: white;
      box-shadow: var(--glow-purple);
    }
    
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: var(--text-primary);
      cursor: pointer;
      background: none;
      border: none;
    }
    
    /* Hero */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(10,10,10,0.7) 0%, rgba(30,10,40,0.8) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      margin-top: 0;
      padding-top: 5rem;
    }
    
    .hero-content {
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
    }
    
    .hero-title {
      font-family: var(--font-display);
      font-size: clamp(2.8rem, 8vw, 5rem);
      font-weight: 900;
      text-shadow: 0 0 25px rgba(168,85,247,0.8);
      margin-bottom: 1.5rem;
      line-height: 1.2;
      color: white;
    }
    
    .hero-subtitle {
      font-size: 1.3rem;
      color: var(--text-secondary);
      margin-bottom: 2.5rem;
      border-right: 3px solid var(--electric-cyan);
      white-space: nowrap;
      overflow: hidden;
      animation: typing 3.5s steps(30, end), blink-caret 0.75s step-end infinite;
      display: inline-block;
      max-width: 100%;
    }
    
    @keyframes typing {
      from { width: 0 }
      to { width: 100% }
    }
    @keyframes blink-caret {
      from, to { border-color: transparent }
      50% { border-color: var(--electric-cyan) }
    }
    
    .hero-actions {
      display: flex;
      gap: 1.5rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    
    /* 板块通用 */
    section {
      padding: 5rem 0;
    }
    
    .section-title {
      font-family: var(--font-display);
      font-size: 2.5rem;
      font-weight: 800;
      margin-bottom: 1rem;
      text-align: center;
      color: white;
    }
    
    .section-subtitle {
      color: var(--text-secondary);
      text-align: center;
      max-width: 700px;
      margin: 0 auto 3rem auto;
    }
    
    /* 特色卡片 非对称网格 */
    .features-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      margin-top: 2rem;
    }
    
    .feature-card {
      background: var(--panel-bg);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-card);
      padding: 2rem;
      border: 1px solid var(--border-dim);
      transition: var(--transition-smooth);
      position: relative;
    }
    
    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 12px;
      height: 12px;
      background: var(--neon-purple);
      clip-path: polygon(0 0, 100% 0, 0 100%);
    }
    
    .feature-card:hover {
      transform: translateY(-10px);
      border-color: var(--electric-cyan);
      box-shadow: 0 0 30px rgba(168,85,247,0.5);
    }
    
    .feature-card:nth-child(3) {
      grid-column: span 2;
      max-width: 60%;
      margin: 0 auto;
    }
    
    .feature-icon {
      font-size: 2.3rem;
      color: var(--electric-cyan);
      margin-bottom: 1.2rem;
    }
    
    /* 产品卡片 */
    .products-scroll {
      display: flex;
      gap: 2rem;
      overflow-x: auto;
      padding: 1rem 0;
      scrollbar-width: thin;
      scrollbar-color: var(--neon-purple) #1a1a1a;
    }
    
    .product-card {
      min-width: 280px;
      background: var(--panel-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid var(--border-dim);
      transition: var(--transition-smooth);
    }
    
    .product-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }
    
    .product-info {
      padding: 1.5rem;
    }
    
    /* 场景区交替 */
    .scenario-row {
      display: flex;
      align-items: center;
      margin-bottom: 3rem;
      gap: 2rem;
    }
    
    .scenario-row.reverse {
      flex-direction: row-reverse;
    }
    
    .scenario-img {
      flex: 1;
      min-height: 300px;
      background-size: cover;
      background-position: center;
      border-radius: var(--radius-card);
    }
    
    /* 案例仪表盘 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    
    .stat-number {
      font-family: var(--font-display);
      font-size: 3rem;
      color: var(--electric-cyan);
    }
    
    /* 价格卡片 */
    .pricing-grid {
      display: flex;
      gap: 2rem;
      justify-content: center;
      flex-wrap: wrap;
    }
    
    .pricing-card {
      background: var(--panel-bg);
      border-radius: var(--radius-card);
      padding: 2rem;
      border: 1px solid var(--border-dim);
      flex: 1;
      min-width: 250px;
    }
    
    .pricing-card.featured {
      border-color: var(--neon-purple);
      box-shadow: 0 0 35px rgba(168,85,247,0.6);
      transform: scale(1.05);
    }
    
    /* FAQ */
    .faq-item {
      background: var(--panel-bg);
      border-radius: var(--radius-card);
      margin-bottom: 1rem;
      border: 1px solid var(--border-dim);
    }
    
    .faq-question {
      padding: 1.2rem 2rem;
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    
    .faq-answer {
      padding: 0 2rem 1.2rem;
      display: none;
    }
    
    .faq-item.active .faq-answer {
      display: block;
    }
    
    .faq-item.active {
      border-color: var(--neon-purple);
    }
    
    /* 页脚 */
    footer {
      background: #050510;
      border-top: 2px solid var(--neon-purple);
      padding: 3rem 0;
    }
    
    @media (max-width: 768px) {
      .hamburger {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        background: rgba(10,10,10,0.95);
        padding: 1rem 0;
      }
      .nav-links.active {
        display: flex;
      }
      .features-grid {
        grid-template-columns: 1fr;
      }
      .feature-card:nth-child(3) {
        grid-column: span 1;
        max-width: 100%;
      }
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
      .scenario-row {
        flex-direction: column;
      }
    }