/* roulang page: index */
:root {
      --bg-main: #070b14;
      --bg-alt: #0d1527;
      --bg-card: rgba(16, 28, 54, 0.72);
      --bg-card-hover: rgba(22, 38, 72, 0.85);
      --primary-blue: #0066FF;
      --laser-blue: #00D2FF;
      --ready-green: #00E599;
      --warning-orange: #FF8A00;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --text-dim: #64748B;
      --border-glow: rgba(0, 210, 255, 0.18);
      --border-subtle: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --shadow-glow: 0 0 25px rgba(0, 102, 255, 0.35);
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        linear-gradient(rgba(0, 210, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 210, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
    }

    .mono {
      font-family: 'JetBrains Mono', monospace;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部状态栏 */
    .top-status-bar {
      height: 38px;
      background: rgba(3, 7, 18, 0.95);
      border-bottom: 1px solid var(--border-subtle);
      font-size: 0.8125rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      position: relative;
      z-index: 101;
    }
    .top-status-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .top-protocols {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--ready-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--ready-green);
      margin-right: 6px;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(7, 11, 20, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glow);
      transition: var(--transition);
    }
    .nav-container {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
      font-size: 1.25rem;
      letter-spacing: -0.5px;
      color: #fff;
    }
    .nav-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary-blue), var(--laser-blue));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 12px rgba(0, 210, 255, 0.5);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--laser-blue);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--laser-blue);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-cta {
      display: flex;
      align-items: center;
    }

    /* 按钮样式 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      outline: none;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-blue), #004ecc);
      color: #fff;
      box-shadow: var(--shadow-glow);
      border: 1px solid rgba(0, 210, 255, 0.4);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 102, 255, 0.6);
      background: linear-gradient(135deg, #0077ff, #005ce6);
    }
    .btn-outline {
      background: rgba(0, 210, 255, 0.05);
      border: 1px solid var(--laser-blue);
      color: var(--laser-blue);
    }
    .btn-outline:hover {
      background: rgba(0, 210, 255, 0.15);
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
      color: #fff;
    }
    .btn-lg {
      padding: 14px 30px;
      font-size: 1.05rem;
      border-radius: var(--radius-md);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.5rem;
      cursor: pointer;
    }

    /* 板块通用规范 */
    .section-wrap {
      padding: 90px 0;
      position: relative;
    }
    .section-bg-alt {
      background: var(--bg-alt);
      background-image: radial-gradient(circle at 50% 0%, rgba(0, 102, 255, 0.08) 0%, transparent 70%);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-head {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 54px;
    }
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      background: rgba(0, 210, 255, 0.08);
      border: 1px solid rgba(0, 210, 255, 0.25);
      border-radius: 99px;
      color: var(--laser-blue);
      font-size: 0.8125rem;
      font-weight: 600;
      margin-bottom: 16px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 玻璃卡片 */
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      background: var(--bg-card-hover);
      border-color: rgba(0, 210, 255, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 210, 255, 0.1);
    }

    /* 1. Hero 视频遮罩首屏 */
    .hero-section {
      position: relative;
      min-height: 640px;
      display: flex;
      align-items: center;
      padding: 80px 0;
      overflow: hidden;
      background: #050811;
    }
    .hero-bg-poster {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.35;
      filter: blur(1px) brightness(0.6);
      z-index: 1;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(7, 11, 20, 0.7) 0%, rgba(7, 11, 20, 0.95) 100%),
                  radial-gradient(ellipse at center, rgba(0, 102, 255, 0.15) 0%, transparent 70%);
      z-index: 2;
    }
    .hero-content {
      position: relative;
      z-index: 3;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .hero-title {
      font-size: 3.25rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 24px;
      letter-spacing: -1px;
      background: linear-gradient(135deg, #FFFFFF 30%, var(--laser-blue) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: #CBD5E1;
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-bottom: 44px;
      flex-wrap: wrap;
    }
    .hero-quick-tags {
      display: flex;
      justify-content: center;
      gap: 24px;
      flex-wrap: wrap;
      color: var(--text-dim);
      font-size: 0.875rem;
    }
    .hero-quick-tags span {
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--text-muted);
    }

    /* 2. 指标看板 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      position: relative;
    }
    .metric-val {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--laser-blue);
      margin-bottom: 8px;
      text-shadow: 0 0 15px rgba(0, 210, 255, 0.4);
    }
    .metric-label {
      font-size: 1rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 6px;
    }
    .metric-note {
      font-size: 0.8125rem;
      color: var(--text-dim);
    }

    /* 3. 问题陈述（传统控制瓶颈） */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pain-card {
      border-left: 3px solid var(--warning-orange);
    }
    .pain-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      color: var(--warning-orange);
      font-weight: 600;
      font-size: 1.125rem;
    }

    /* 4. 架构矩阵 */
    .arch-stack {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .arch-layer {
      display: grid;
      grid-template-columns: 240px 1fr;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .arch-layer-head {
      background: rgba(0, 102, 255, 0.15);
      border-right: 1px solid var(--border-glow);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .arch-layer-title {
      font-weight: 700;
      font-size: 1.1rem;
      color: var(--laser-blue);
      margin-bottom: 4px;
    }
    .arch-layer-sub {
      font-size: 0.8125rem;
      color: var(--text-dim);
    }
    .arch-layer-body {
      padding: 24px 30px;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
    }
    .arch-chip {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      color: #E2E8F0;
    }

    /* 5. 核心优势六宫格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--laser-blue);
      margin-bottom: 18px;
    }
    .feature-title {
      font-size: 1.2rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: #fff;
    }
    .feature-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 6. 产品中心 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-img-wrap {
      height: 200px;
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 20px;
      border: 1px solid var(--border-subtle);
      position: relative;
    }
    .product-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .glass-card:hover .product-img-wrap img {
      transform: scale(1.05);
    }
    .product-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(3, 7, 18, 0.8);
      border: 1px solid var(--laser-blue);
      color: var(--laser-blue);
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
    }
    .product-specs {
      list-style: none;
      margin: 16px 0 24px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 0.875rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-subtle);
      padding-top: 14px;
    }
    .product-specs li {
      display: flex;
      justify-content: space-between;
    }
    .product-specs li span:last-child {
      color: #fff;
      font-weight: 500;
    }

    /* 7. 性能对比 */
    .compare-table-wrap {
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-glow);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-subtle);
    }
    .compare-table th {
      background: rgba(0, 102, 255, 0.15);
      color: #fff;
      font-weight: 600;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-col {
      background: rgba(0, 210, 255, 0.04);
      color: var(--laser-blue);
      font-weight: 600;
    }

    /* 8. 严苛工况验证 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .story-cover {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-glow);
    }
    .story-cover img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .story-data-badges {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .story-badge-item {
      background: rgba(255, 255, 255, 0.03);
      padding: 14px;
      border-radius: var(--radius-sm);
      border-left: 2px solid var(--ready-green);
    }
    .story-badge-val {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--ready-green);
    }
    .story-badge-lbl {
      font-size: 0.8125rem;
      color: var(--text-dim);
    }

    /* 9. 客户技术口碑 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-user {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: 20px;
      padding-top: 18px;
      border-top: 1px solid var(--border-subtle);
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-blue), var(--laser-blue));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }
    .testi-role {
      font-size: 0.8125rem;
      color: var(--text-dim);
    }

    /* 10. 控制资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-date {
      font-size: 0.8125rem;
      color: var(--laser-blue);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: #fff;
      line-height: 1.4;
    }

    /* 11. 资质保障体系 */
    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .trust-item {
      text-align: center;
      padding: 24px;
      background: var(--bg-card);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
    }
    .trust-icon {
      font-size: 2rem;
      color: var(--laser-blue);
      margin-bottom: 12px;
    }

    /* 12. 转化表单区 */
    .cta-box {
      background: linear-gradient(135deg, rgba(13, 21, 39, 0.95), rgba(7, 11, 20, 0.95));
      border: 1px solid var(--laser-blue);
      box-shadow: 0 0 35px rgba(0, 102, 255, 0.25);
      border-radius: var(--radius-xl);
      padding: 48px;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 48px;
      align-items: center;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .form-group-full {
      grid-column: span 2;
    }
    .form-input, .form-select {
      width: 100%;
      background: rgba(3, 7, 18, 0.8);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      color: #fff;
      font-size: 0.9375rem;
      outline: none;
      transition: var(--transition);
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--laser-blue);
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
    }
    .form-select option {
      background: #0d1527;
      color: #fff;
    }

    /* 页脚 */
    .site-footer {
      background: #03060d;
      border-top: 1px solid var(--border-subtle);
      padding: 70px 0 30px;
      color: var(--text-muted);
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr;
      gap: 48px;
      margin-bottom: 48px;
    }
    .footer-title {
      color: #fff;
      font-weight: 600;
      font-size: 1rem;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--laser-blue);
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
      color: var(--text-dim);
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.5rem; }
      .metrics-grid, .features-grid, .products-grid, .testimonial-grid, .news-grid, .trust-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .arch-layer { grid-template-columns: 1fr; }
      .arch-layer-head { border-right: none; border-bottom: 1px solid var(--border-glow); }
      .cta-box { grid-template-columns: 1fr; }
      .story-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .top-status-bar { display: none; }
      .mobile-toggle { display: block; }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(7, 11, 20, 0.98);
        flex-direction: column;
        padding: 40px 24px;
        gap: 20px;
        display: none;
      }
      .nav-menu.open { display: flex; }
      .nav-cta { display: none; }
      .hero-title { font-size: 2rem; }
      .hero-section { padding: 60px 0; min-height: auto; }
      .metrics-grid, .pain-grid, .features-grid, .products-grid, .testimonial-grid, .news-grid, .trust-grid {
        grid-template-columns: 1fr;
      }
      .form-grid { grid-template-columns: 1fr; }
      .form-group-full { grid-column: span 1; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }