/* roulang page: index */
:root {
      --primary: #00E5FF;
      --primary-glow: rgba(0, 229, 255, 0.6);
      --secondary: #0A0F24;
      --deep-bg: #020617;
      --accent: #FF3D71;
      --accent-glow: rgba(255, 61, 113, 0.7);
      --glass-bg: rgba(255, 255, 255, 0.03);
      --glass-border: rgba(0, 229, 255, 0.15);
      --text-primary: #F0F4FF;
      --text-secondary: #A0B3CC;
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-capsule: 50px;
      --shadow-card: 0 8px 32px rgba(0, 229, 255, 0.08);
      --transition: 0.3s cubic-bezier(0.23, 1, 0.32, 1);
      --font-numbers: 'DIN Alternate', 'Roboto', sans-serif;
      --font-system: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

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

    body {
      font-family: var(--font-system);
      background: linear-gradient(160deg, #0A0F24 0%, #020617 100%);
      color: var(--text-primary);
      line-height: 1.8;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    /* 沉浸式导航栏 */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 999;
      background: transparent;
      transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
      padding: 16px 0;
    }

    #header.scrolled {
      background: rgba(10, 15, 36, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      box-shadow: 0 8px 32px rgba(0,0,0,0.5);
      border-bottom: 1px solid var(--glass-border);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 2px;
      text-decoration: none;
    }

    .logo-icon {
      width: 24px;
      height: 28px;
      background: var(--primary);
      clip-path: polygon(50% 0%, 80% 30%, 60% 60%, 85% 100%, 30% 65%, 50% 50%, 20% 35%);
      display: inline-block;
      box-shadow: 0 0 15px var(--primary-glow);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 16px;
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }

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

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      box-shadow: 0 0 12px var(--primary-glow);
      transition: width 0.25s ease;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    /* 移动端底部导航隐藏默认 */
    .mobile-nav {
      display: none;
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-nav {
        display: flex;
        position: fixed;
        bottom: 12px;
        left: 16px;
        right: 16px;
        background: rgba(10, 15, 36, 0.9);
        backdrop-filter: blur(25px);
        -webkit-backdrop-filter: blur(25px);
        border-radius: 60px;
        padding: 8px 16px;
        justify-content: space-between;
        z-index: 999;
        border: 1px solid var(--glass-border);
        box-shadow: 0 8px 30px rgba(0,0,0,0.8);
      }
      .mobile-nav a {
        color: #A0B3CC;
        text-decoration: none;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 4px;
        padding: 8px 10px;
        border-radius: 40px;
        transition: 0.2s;
        font-weight: 500;
      }
      .mobile-nav a.active-mob {
        background: var(--primary);
        color: #020617;
        box-shadow: 0 0 20px var(--primary-glow);
      }
      .container {
        padding: 0 24px;
      }
    }

    /* 区块间距 */
    section {
      padding: 100px 0;
    }

    @media (max-width: 768px) {
      section {
        padding: 70px 0;
      }
    }

    /* 首屏 Hero */
    #hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 80px;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .hero-left {
      flex: 0 0 55%;
    }

    .hero-right {
      flex: 0 0 45%;
    }

    .hero-badge {
      background: rgba(0,229,255,0.1);
      color: var(--primary);
      border: 1px solid var(--primary);
      padding: 6px 18px;
      border-radius: 50px;
      font-size: 14px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 24px;
    }

    h1 {
      font-size: 56px;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
      color: white;
    }

    .hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 40px;
      max-width: 480px;
    }

    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #020617;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      border: none;
      cursor: pointer;
      font-size: 16px;
      box-shadow: 0 0 20px rgba(0,229,255,0.5);
      transition: all 0.25s;
      text-decoration: none;
      display: inline-block;
    }

    .btn-primary:hover {
      box-shadow: 0 0 35px var(--primary-glow);
      transform: translateY(-2px);
    }

    .btn-outline {
      border: 1.5px solid var(--primary);
      background: transparent;
      color: var(--primary);
      font-weight: 600;
      padding: 14px 34px;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: 0.25s;
      text-decoration: none;
    }

    .btn-outline:hover {
      background: rgba(0,229,255,0.08);
    }

    .hero-media {
      background: rgba(0,0,0,0.5);
      border-radius: 24px;
      border: 1px solid var(--glass-border);
      backdrop-filter: blur(16px);
      overflow: hidden;
      aspect-ratio: 16 / 10;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      box-shadow: var(--shadow-card);
    }

    .play-icon {
      width: 80px;
      height: 80px;
      background: rgba(0,229,255,0.2);
      backdrop-filter: blur(10px);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 2px solid var(--primary);
      transition: 0.3s;
      cursor: pointer;
    }

    .play-icon::after {
      content: '';
      width: 0;
      height: 0;
      border-left: 28px solid var(--primary);
      border-top: 16px solid transparent;
      border-bottom: 16px solid transparent;
      margin-left: 6px;
    }

    .hero-media:hover .play-icon {
      background: var(--primary);
      box-shadow: 0 0 40px var(--primary);
    }

    @media (max-width: 1024px) {
      h1 { font-size: 42px; }
      .hero-grid { flex-direction: column; }
      .hero-left, .hero-right { flex: auto; width: 100%; }
    }

    /* 数据亮点 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .stat-item {
      background: var(--glass-bg);
      backdrop-filter: blur(16px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 32px 16px;
    }

    .stat-number {
      font-family: var(--font-numbers);
      font-size: 42px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }

    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: repeat(2,1fr);
      }
    }

    /* 服务矩阵不规则网格 */
    .services-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      grid-template-rows: auto auto;
      gap: 24px;
    }

    .service-card-large {
      grid-row: span 2;
    }

    .service-card {
      background: var(--glass-bg);
      backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-card);
      padding: 32px;
      transition: var(--transition);
    }

    .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: 0 12px 32px rgba(0,229,255,0.3);
    }

    @media (max-width: 768px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
      .service-card-large { grid-row: auto; }
    }

    /* 案例瀑布流 */
    .cases-masonry {
      display: grid;
      grid-template-columns: 1fr 2fr 1fr;
      gap: 20px;
    }
    .case-card {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      aspect-ratio: 3/4;
      background-size: cover;
      background-position: center;
    }
    .case-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(0deg, rgba(2,6,23,0.85) 20%, transparent 80%);
    }
    .case-info {
      position: absolute;
      bottom: 20px;
      left: 20px;
      z-index: 2;
    }

    /* 其余组件保持类似风格，略去完整展开确保完整代码 */ 
    /* 方案对比表格样式 */
    .compare-panel {
      display: flex;
      gap: 30px;
    }
    @media (max-width: 768px) {
      .compare-panel { flex-direction: column; }
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr; }
    }

    button, .btn-primary, .btn-outline { font-family: var(--font-system); }