/* roulang page: index */
:root {
      --primary: #0F4C81;
      --primary-hover: #0a365c;
      --accent: #008080;
      --accent-hover: #006666;
      --dark: #1A202C;
      --muted: #4A5568;
      --light-muted: #718096;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0B192C;
      --border: #E2E8F0;
      --border-dark: #1E293B;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 10px 25px -5px rgba(15, 76, 129, 0.09), 0 8px 10px -6px rgba(15, 76, 129, 0.04);
      --font-stack: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--dark);
      background-color: var(--bg-main);
      line-height: 1.7;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, opacity 0.2s ease;
    }

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 顶部信息条 */
    .topbar {
      background-color: #EEF2F6;
      border-bottom: 1px solid var(--border);
      font-size: 0.825rem;
      color: var(--muted);
      padding: 0.45rem 0;
    }
    .topbar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.75rem;
    }
    .topbar-group {
      display: flex;
      align-items: center;
      gap: 1.25rem;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
      transition: box-shadow 0.3s ease;
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .brand-badge {
      font-size: 0.75rem;
      font-weight: 600;
      background-color: #E6F0FA;
      color: var(--primary);
      padding: 0.2rem 0.55rem;
      border-radius: var(--radius-sm);
      letter-spacing: normal;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 1.75rem;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--dark);
      position: relative;
      padding: 0.25rem 0;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }
    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--accent);
      color: #FFFFFF;
      font-size: 0.9rem;
      font-weight: 600;
      padding: 0.6rem 1.2rem;
      border-radius: var(--radius-sm);
      transition: background-color 0.2s ease, transform 0.15s ease;
    }
    .nav-cta-btn:hover {
      background-color: var(--accent-hover);
      color: #FFFFFF;
      transform: translateY(-1px);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border);
      padding: 0.5rem;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }
    .mobile-menu-toggle svg {
      width: 24px;
      height: 24px;
      stroke: var(--dark);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 0.75rem 1.6rem;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
      gap: 0.5rem;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(15, 76, 129, 0.25);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 4px 12px rgba(0, 128, 128, 0.25);
    }
    .btn-outline {
      background-color: #FFFFFF;
      border-color: var(--border);
      color: var(--dark);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: #F8FAFC;
    }

    /* 区块通用结构 */
    .section-wrap {
      padding: 5rem 0;
      position: relative;
    }
    .section-wrap-light {
      background-color: var(--bg-main);
    }
    .section-wrap-white {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .section-wrap-dark {
      background-color: var(--bg-dark);
      color: #F1F5F9;
    }
    .section-head {
      max-width: 800px;
      margin-bottom: 3.5rem;
    }
    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--accent);
      margin-bottom: 0.75rem;
      background-color: #E6F7F7;
      padding: 0.25rem 0.65rem;
      border-radius: var(--radius-sm);
    }
    .section-wrap-dark .section-tag {
      background-color: rgba(0, 128, 128, 0.2);
      color: #4FD1C5;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--dark);
      line-height: 1.3;
      margin-bottom: 1rem;
      letter-spacing: -0.02em;
    }
    .section-wrap-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--muted);
      line-height: 1.75;
    }
    .section-wrap-dark .section-desc {
      color: #94A3B8;
    }

    /* 板块一：Hero 首屏 */
    .hero-section {
      background: linear-gradient(135deg, #0F4C81 0%, #0B3356 100%);
      color: #FFFFFF;
      padding: 5.5rem 0 6rem 0;
      position: relative;
      overflow: hidden;
    }
    .hero-bg-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.12;
      mix-blend-mode: luminosity;
      pointer-events: none;
    }
    .hero-grid {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 3.5rem;
      align-items: center;
    }
    .hero-title {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.5rem;
      letter-spacing: -0.03em;
    }
    .hero-title span {
      color: #38BDF8;
    }
    .hero-desc {
      font-size: 1.125rem;
      line-height: 1.8;
      color: #E2E8F0;
      margin-bottom: 2.25rem;
      max-width: 620px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 2.5rem;
    }
    .hero-status-strip {
      display: flex;
      align-items: center;
      gap: 2rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      font-size: 0.875rem;
      color: #CBD5E1;
    }
    .status-item {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }
    .hero-preview-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 1.75rem;
      backdrop-filter: blur(12px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
    }
    .card-terminal-bar {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
      padding-bottom: 0.75rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .terminal-circle {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .terminal-title {
      font-family: monospace;
      font-size: 0.8rem;
      color: #94A3B8;
      margin-left: auto;
    }
    .hero-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    /* 板块二：指标看板 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2rem 1.5rem;
      text-align: left;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .metric-num {
      font-family: "JetBrains Mono", Consolas, monospace;
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 0.5rem;
    }
    .metric-unit {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--accent);
      margin-left: 0.2rem;
    }
    .metric-label {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.5rem;
    }
    .metric-desc {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.6;
    }

    /* 板块三：核心架构与技术规范 */
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .tech-visual {
      position: relative;
    }
    .tech-visual img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .tech-floating-pill {
      position: absolute;
      bottom: -1.25rem;
      right: 1.5rem;
      background: #FFFFFF;
      padding: 1rem 1.5rem;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 1rem;
    }
    .pill-icon {
      width: 40px;
      height: 40px;
      background: #E6F0FA;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-weight: bold;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 1.5rem;
    }
    .spec-table th, .spec-table td {
      padding: 0.85rem 1rem;
      border-bottom: 1px solid var(--border);
      font-size: 0.9rem;
      text-align: left;
    }
    .spec-table th {
      color: var(--muted);
      font-weight: 600;
      width: 32%;
      background-color: #F8FAFC;
    }
    .spec-table td {
      color: var(--dark);
      font-weight: 500;
    }

    /* 板块四：功能特性矩阵 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2.25rem 1.75rem;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background-color: #EBF3FA;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1.5rem;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .feature-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.75rem;
    }
    .feature-text {
      font-size: 0.925rem;
      color: var(--muted);
      line-height: 1.7;
    }

    /* 板块五：产品套件 */
    .suite-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .suite-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 2.5rem 2rem;
      display: flex;
      flex-direction: column;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    .suite-card.highlight {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
    }
    .suite-card:hover {
      transform: translateY(-4px);
    }
    .suite-badge {
      position: absolute;
      top: 1.25rem;
      right: 1.25rem;
      font-size: 0.75rem;
      font-weight: 700;
      background-color: var(--primary);
      color: #FFFFFF;
      padding: 0.25rem 0.6rem;
      border-radius: var(--radius-sm);
    }
    .suite-name {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 0.5rem;
    }
    .suite-type {
      font-size: 0.875rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 1.25rem;
    }
    .suite-desc {
      font-size: 0.925rem;
      color: var(--muted);
      margin-bottom: 1.75rem;
      line-height: 1.65;
    }
    .suite-features-list {
      list-style: none;
      margin-bottom: 2rem;
      border-top: 1px solid var(--border);
      padding-top: 1.25rem;
      flex-grow: 1;
    }
    .suite-features-list li {
      font-size: 0.875rem;
      color: var(--dark);
      padding: 0.4rem 0;
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
    .suite-features-list li::before {
      content: '✓';
      color: var(--accent);
      font-weight: 800;
    }

    /* 板块六：深色理念与超大规模计算 */
    .dark-concept-box {
      background: #112233;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 3rem;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 3rem;
      align-items: center;
    }
    .dark-concept-text h3 {
      font-size: 1.85rem;
      color: #FFFFFF;
      margin-bottom: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.01em;
    }
    .dark-concept-text p {
      color: #94A3B8;
      font-size: 0.975rem;
      line-height: 1.8;
      margin-bottom: 1.5rem;
    }
    .concept-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.25rem;
    }
    .concept-item {
      border-left: 2px solid var(--accent);
      padding-left: 1rem;
    }
    .concept-item-title {
      color: #FFFFFF;
      font-weight: 700;
      font-size: 0.95rem;
      margin-bottom: 0.35rem;
    }
    .concept-item-desc {
      color: #64748B;
      font-size: 0.85rem;
      line-height: 1.6;
    }
    .dark-concept-visual img {
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
      width: 100%;
      height: 320px;
      object-fit: cover;
    }

    /* 板块七：应用场景与实践案例 */
    .cases-container {
      display: flex;
      flex-direction: column;
      gap: 2.5rem;
    }
    .case-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      box-shadow: var(--shadow-sm);
    }
    .case-row.reverse {
      grid-template-columns: 1fr 1fr;
      direction: rtl;
    }
    .case-row.reverse .case-content {
      direction: ltr;
    }
    .case-tag {
      font-size: 0.775rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 0.5rem;
      display: inline-block;
    }
    .case-title {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: var(--dark);
    }
    .case-desc {
      font-size: 0.95rem;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 1.5rem;
    }
    .case-stats {
      display: flex;
      gap: 2rem;
      border-top: 1px solid var(--border);
      padding-top: 1rem;
    }
    .case-stat-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent);
      font-family: monospace;
    }
    .case-stat-name {
      font-size: 0.8rem;
      color: var(--muted);
    }
    .case-img {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border);
      height: 280px;
    }
    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 板块八：基准测试与对比 */
    .benchmark-table-box {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .benchmark-table th, .benchmark-table td {
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--border);
      font-size: 0.95rem;
    }
    .benchmark-table th {
      background-color: #F1F5F9;
      color: var(--dark);
      font-weight: 700;
    }
    .benchmark-table tr:last-child td {
      border-bottom: none;
    }
    .benchmark-highlight {
      color: var(--accent);
      font-weight: 700;
    }
    .benchmark-tag {
      background-color: #DEF7EC;
      color: #03543F;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.2rem 0.5rem;
      border-radius: var(--radius-sm);
      margin-left: 0.5rem;
    }

    /* 板块九：技术演进里程碑 */
    .timeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }
    .timeline-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      position: relative;
    }
    .timeline-node {
      font-family: monospace;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 0.5rem;
    }
    .timeline-heading {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.65rem;
    }
    .timeline-body {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.6;
    }

    /* 板块十：行业洞察与白皮书摘要 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1rem;
      font-size: 0.8rem;
      color: var(--light-muted);
    }
    .news-category {
      color: var(--primary);
      font-weight: 700;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 0.75rem;
      line-height: 1.45;
    }
    .news-summary {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }
    .news-link:hover {
      color: var(--accent-hover);
    }

    /* 板块十一：技术选型与部署 FAQ */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .faq-accordion {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-accordion[open] {
      border-color: var(--primary);
    }
    .faq-summary {
      padding: 1.25rem 1.75rem;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary::after {
      content: '+';
      font-size: 1.35rem;
      font-weight: 400;
      color: var(--muted);
      transition: transform 0.2s ease;
    }
    .faq-accordion[open] .faq-summary::after {
      content: '−';
      color: var(--primary);
    }
    .faq-content {
      padding: 0 1.75rem 1.5rem 1.75rem;
      font-size: 0.925rem;
      color: var(--muted);
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      margin-top: -0.25rem;
      padding-top: 1rem;
    }

    /* 板块十二：授权申请与咨询表单 */
    .contact-card-box {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 4rem;
    }
    .contact-info-col h3 {
      font-size: 1.75rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: var(--dark);
    }
    .contact-info-col p {
      font-size: 0.95rem;
      color: var(--muted);
      line-height: 1.75;
      margin-bottom: 2rem;
    }
    .contact-assurances {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 1rem;
      margin-bottom: 2rem;
    }
    .contact-assurances li {
      font-size: 0.875rem;
      color: var(--dark);
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }
    .contact-assurances li svg {
      width: 18px;
      height: 18px;
      stroke: var(--accent);
      flex-shrink: 0;
    }
    .form-group-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.25rem;
      margin-bottom: 1.25rem;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 0.45rem;
      margin-bottom: 1.25rem;
    }
    .form-label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--dark);
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-family: inherit;
      font-size: 0.9rem;
      color: var(--dark);
      background-color: #F8FAFC;
      transition: border-color 0.2s ease, background-color 0.2s ease;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(15, 76, 129, 0.1);
    }
    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }

    /* 页脚 */
    .site-footer {
      background-color: #0B192C;
      color: #94A3B8;
      border-top: 1px solid var(--border-dark);
      padding: 4.5rem 0 2rem 0;
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 1rem;
      letter-spacing: -0.02em;
    }
    .footer-brand-text {
      font-size: 0.875rem;
      line-height: 1.7;
      color: #94A3B8;
      margin-bottom: 1.5rem;
    }
    .footer-col-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.8rem;
      color: #64748B;
    }

    /* 响应式断点处理 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .suite-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dark-concept-box {
        grid-template-columns: 1fr;
      }
      .timeline-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: #FFFFFF;
        flex-direction: column;
        padding: 1.5rem;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border);
        gap: 1rem;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-cta-btn {
        display: none;
      }
      .hero-title {
        font-size: 2.25rem;
      }
      .tech-grid {
        grid-template-columns: 1fr;
      }
      .case-row, .case-row.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
      }
      .contact-card-box {
        grid-template-columns: 1fr;
        padding: 2rem;
      }
      .form-group-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .metrics-grid,
      .features-grid,
      .suite-grid,
      .timeline-grid,
      .news-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-status-strip {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
      }
    }