/* roulang page: index */
:root {
      --bg-dark: #070B19;
      --bg-card: rgba(13, 21, 45, 0.72);
      --bg-card-hover: rgba(18, 30, 64, 0.85);
      --cyan-bright: #00F2FE;
      --neon-blue: #4FACFE;
      --neon-green: #00E676;
      --text-white: #FFFFFF;
      --text-muted: #94A3B8;
      --border-line: rgba(0, 242, 254, 0.22);
      --border-light: rgba(255, 255, 255, 0.08);
      --glow-shadow: 0 0 25px rgba(0, 242, 254, 0.35);
      --glow-subtle: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-white);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, input, select {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航 */
    .top-bar {
      background: #040711;
      border-bottom: 1px solid var(--border-light);
      font-size: 13px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-contact-group {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .top-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--cyan-bright);
    }
    .top-tag::before {
      content: '';
      display: inline-block;
      width: 6px;
      height: 6px;
      background: var(--neon-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--neon-green);
    }

    .main-nav-wrapper {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 11, 25, 0.85);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
    }
    .main-nav {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 74px;
    }
    .brand-logo {
      font-size: 20px;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: var(--text-white);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--cyan-bright), var(--neon-blue));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #040711;
      font-weight: 900;
      font-size: 18px;
    }
    .brand-logo-text span {
      color: var(--cyan-bright);
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      font-size: 15px;
      color: var(--text-muted);
      position: relative;
      padding: 6px 0;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--cyan-bright);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan-bright);
      transition: var(--transition);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      background: linear-gradient(90deg, #00F2FE 0%, #4FACFE 100%);
      color: #040711 !important;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 22px;
      border-radius: 30px;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
    }
    .nav-cta:hover {
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.7);
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-line);
      color: var(--cyan-bright);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      font-size: 18px;
      cursor: pointer;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 30px;
      font-size: 16px;
      font-weight: 600;
      border-radius: 30px;
      cursor: pointer;
      transition: var(--transition);
      border: none;
    }
    .btn-primary {
      background: linear-gradient(90deg, var(--cyan-bright) 0%, var(--neon-blue) 100%);
      color: #040711;
      box-shadow: var(--glow-shadow);
    }
    .btn-primary:hover {
      transform: scale(1.02);
      box-shadow: 0 0 35px rgba(0, 242, 254, 0.7);
    }
    .btn-outline {
      background: rgba(13, 21, 45, 0.6);
      color: var(--text-white);
      border: 1px solid var(--cyan-bright);
      backdrop-filter: blur(8px);
    }
    .btn-outline:hover {
      background: rgba(0, 242, 254, 0.15);
      border-color: var(--cyan-bright);
    }

    /* 板块通用 */
    section {
      padding: 96px 0;
      position: relative;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 64px;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 12px;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--cyan-bright);
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid rgba(0, 242, 254, 0.3);
      border-radius: 20px;
      margin-bottom: 16px;
    }
    .section-title {
      font-size: 34px;
      line-height: 1.35;
      font-weight: 700;
      margin-bottom: 18px;
      background: linear-gradient(180deg, #FFFFFF 0%, #CBD5E1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      backdrop-filter: blur(12px);
      border-radius: var(--radius-md);
      padding: 32px;
      transition: var(--transition);
      box-shadow: var(--glow-subtle);
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      background: var(--bg-card-hover);
      border-color: var(--cyan-bright);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 242, 254, 0.15);
    }

    /* 1. 首屏全宽沉浸 KV (#hero) */
    .hero-section {
      padding: 120px 0 100px;
      background: radial-gradient(circle at 50% 20%, rgba(0, 242, 254, 0.15) 0%, rgba(7, 11, 25, 0.95) 75%), url('/assets/images/81370c93ad96d311.png') center/cover no-repeat;
      position: relative;
      min-height: 85vh;
      display: flex;
      align-items: center;
    }
    .hero-content {
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
      position: relative;
      z-index: 2;
    }
    .hero-countdown-bar {
      display: inline-flex;
      align-items: center;
      gap: 16px;
      background: rgba(13, 21, 45, 0.85);
      border: 1px solid var(--border-line);
      padding: 8px 24px;
      border-radius: 40px;
      margin-bottom: 28px;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
    }
    .hero-countdown-title {
      font-size: 13px;
      color: var(--text-muted);
    }
    .hero-timer {
      font-family: monospace;
      font-size: 15px;
      font-weight: 700;
      color: var(--neon-green);
      letter-spacing: 1px;
    }
    .hero-title {
      font-size: 52px;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: linear-gradient(90deg, #00F2FE 0%, #4FACFE 50%, #00E676 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtext {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 40px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
    }

    /* 2. 硬件架构与品牌参数区 (#product-intro) */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .intro-media {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-line);
    }
    .intro-media img {
      width: 100%;
      height: 420px;
      object-fit: cover;
      transition: var(--transition);
    }
    .intro-media:hover img {
      transform: scale(1.03);
    }
    .spec-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .spec-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-light);
      padding: 16px;
      border-radius: var(--radius-sm);
    }
    .spec-item-label {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 4px;
    }
    .spec-item-value {
      font-size: 16px;
      font-weight: 700;
      color: var(--cyan-bright);
    }

    /* 3. 核心优势六卡网格 (#advantages) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .advantage-icon {
      width: 50px;
      height: 50px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid var(--cyan-bright);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--cyan-bright);
      margin-bottom: 20px;
    }
    .card-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-white);
    }
    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 4. 产品套件矩阵对比 (#hardware-matrix) */
    .product-matrix-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .product-tag {
      align-self: flex-start;
      padding: 4px 10px;
      background: rgba(0, 230, 118, 0.15);
      border: 1px solid var(--neon-green);
      color: var(--neon-green);
      font-size: 12px;
      border-radius: 4px;
      margin-bottom: 16px;
    }
    .product-list {
      list-style: none;
      margin: 20px 0 28px;
    }
    .product-list li {
      font-size: 14px;
      color: var(--text-muted);
      padding: 8px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
    }
    .product-list li span:last-child {
      color: var(--text-white);
      font-weight: 600;
    }

    /* 5. 核心算法与测速理念区 (#algorithm-concept) */
    .algo-container {
      background: #091024 url('/assets/images/3692d3a82cb1612f.jpg') center/cover no-repeat;
      background-blend-mode: overlay;
      border: 1px solid var(--border-line);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
    }
    .algo-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .algo-badge-pill {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 20px;
      background: rgba(79, 172, 254, 0.15);
      border: 1px solid var(--neon-blue);
      color: var(--neon-blue);
      font-size: 13px;
      margin-bottom: 20px;
    }

    /* 6. 实测用户应用故事区 (#stories) */
    .story-item {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 48px;
    }
    .story-item:last-child {
      margin-bottom: 0;
    }
    .story-item:nth-child(even) {
      grid-template-columns: 1.2fr 1fr;
    }
    .story-item:nth-child(even) .story-thumb {
      order: 2;
    }
    .story-thumb {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-line);
      height: 280px;
    }
    .story-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 7. 性能数据仪表盘 (#metrics) */
    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-box {
      background: rgba(13, 21, 45, 0.5);
      border: 1px solid var(--border-line);
      padding: 36px 20px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(10px);
    }
    .metric-number {
      font-size: 44px;
      font-weight: 800;
      color: var(--cyan-bright);
      line-height: 1.1;
      margin-bottom: 10px;
      font-family: monospace;
    }
    .metric-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 8. 行业权威测评墙 (#reviews) */
    .review-author {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-top: 24px;
      padding-top: 18px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-blue), var(--cyan-bright));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #040711;
      font-size: 14px;
    }
    .author-name {
      font-size: 15px;
      font-weight: 700;
    }
    .author-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 9. 全场景部署矩阵 (#scenarios) */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scenario-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .scenario-card-img {
      height: 160px;
      overflow: hidden;
    }
    .scenario-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .scenario-card:hover .scenario-card-img img {
      transform: scale(1.05);
    }
    .scenario-card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    /* 10. 资讯列表与科研动态 (#news) */
    .news-date {
      font-size: 12px;
      color: var(--neon-green);
      margin-bottom: 8px;
      display: block;
    }

    /* 11. 常见技术问答 FAQ (#faq) */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-question {
      padding: 22px 28px;
      font-size: 17px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-toggle-icon {
      font-size: 20px;
      color: var(--cyan-bright);
      transition: var(--transition);
    }
    .faq-answer {
      padding: 0 28px 22px;
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }
    .faq-item.active {
      border-color: var(--cyan-bright);
      background: var(--bg-card-hover);
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }

    /* 12. 转化行动区与预约演示 (#cta) */
    .cta-container {
      background: radial-gradient(circle at center, rgba(0, 242, 254, 0.12) 0%, rgba(13, 21, 45, 0.9) 70%);
      border: 1px solid var(--cyan-bright);
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      box-shadow: 0 0 40px rgba(0, 242, 254, 0.25);
    }
    .cta-flex {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .form-box {
      background: rgba(7, 11, 25, 0.7);
      border: 1px solid var(--border-line);
      padding: 32px;
      border-radius: var(--radius-md);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .form-input, .form-select {
      width: 100%;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-light);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      color: var(--text-white);
      outline: none;
      transition: var(--transition);
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--cyan-bright);
      box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
    }
    .form-select option {
      background: #0D152D;
      color: #FFF;
    }

    /* 页脚 */
    footer {
      background: #03050C;
      border-top: 1px solid var(--border-light);
      padding: 72px 0 32px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-col h4 {
      color: var(--text-white);
      font-size: 16px;
      margin-bottom: 20px;
      font-weight: 700;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 12px;
    }
    .footer-col ul li a:hover {
      color: var(--cyan-bright);
    }
    .copyright-row {
      padding-top: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
}

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar-inner {
        flex-direction: column;
        align-items: flex-start;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #070B19;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-line);
        gap: 16px;
      }
      .nav-links.show {
        display: flex;
      }
      .hero-title {
        font-size: 34px;
      }
      .intro-grid, .algo-grid, .story-item, .story-item:nth-child(even), .cta-flex {
        grid-template-columns: 1fr;
      }
      .story-item:nth-child(even) .story-thumb {
        order: unset;
      }
      .grid-3, .grid-4 {
        grid-template-columns: 1fr;
      }
      .metrics-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 26px;
      }
      .cta-container {
        padding: 36px 20px;
      }
    }