/* roulang page: index */
:root {
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --primary: #059669;
      --primary-hover: #047857;
      --primary-subtle: #ECFDF5;
      --accent: #0284C7;
      --accent-subtle: #E0F2FE;
      --border: #E2E8F0;
      --border-dark: #334155;
      --dark-section: #0F172A;
      --dark-card: #1E293B;
      --radius: 8px;
      --radius-lg: 14px;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
      --shadow-float: 0 10px 25px -5px rgba(15, 23, 42, 0.04), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --container: 1200px;
    }

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

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button, input, textarea, select {
      font: inherit;
    }

    .container {
      width: 100%;
      max-width: var(--container);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 顶部双行导航 */
    .top-bar {
      background-color: #0B1329;
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 0.45rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-dot {
      display: inline-block;
      width: 7px;
      height: 7px;
      background-color: #10B981;
      border-radius: 50%;
      margin-right: 6px;
      box-shadow: 0 0 6px #10B981;
    }
    .top-bar-links a {
      margin-left: 1.25rem;
      color: #CBD5E1;
    }
    .top-bar-links a:hover {
      color: #FFFFFF;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
      transition: box-shadow 0.25s ease;
    }
    .site-header.scrolled {
      box-shadow: var(--shadow-md);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .brand-logo {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 0.6rem;
    }
    .brand-logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary) 0%, #047857 100%);
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 6px;
      font-weight: 800;
      font-size: 1rem;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 1.75rem;
    }
    .nav-menu a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 0.35rem 0;
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary);
    }
    .nav-menu a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--primary);
      color: #FFFFFF;
      padding: 0.6rem 1.25rem;
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: var(--radius);
      transition: all 0.2s ease;
    }
    .nav-cta:hover {
      background-color: var(--primary-hover);
      color: #FFFFFF;
      transform: translateY(-1px);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.75rem 1.6rem;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius);
      cursor: pointer;
      transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid transparent;
      text-align: center;
    }
    .btn:active {
      transform: scale(0.98);
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      color: var(--text-main);
      border-color: var(--border);
    }
    .btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }

    /* 标签与徽章 */
    .section-badge {
      display: inline-flex;
      align-items: center;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      padding: 0.3rem 0.75rem;
      background-color: var(--primary-subtle);
      color: var(--primary);
      border-radius: 50px;
      margin-bottom: 0.85rem;
      border: 1px solid rgba(5, 150, 105, 0.15);
    }
    .section-badge.dark {
      background-color: rgba(2, 132, 199, 0.15);
      color: #38BDF8;
      border-color: rgba(56, 189, 248, 0.25);
    }

    /* 板块基础通用排版 */
    section {
      padding: 4.75rem 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 3rem;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-main);
      margin-bottom: 0.85rem;
      line-height: 1.3;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* [板块 1] 首屏矮横幅 Banner (Hero) */
    .hero-banner {
      padding: 3.5rem 0 3.75rem 0;
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      border-bottom: 1px solid var(--border);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 2.5rem;
      align-items: center;
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.03em;
      color: var(--text-main);
      margin-bottom: 1.25rem;
    }
    .hero-h1 span {
      color: var(--primary);
    }
    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      margin-bottom: 2rem;
      max-width: 600px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      margin-bottom: 2rem;
    }
    .hero-meta-points {
      display: flex;
      gap: 1.75rem;
      font-size: 0.875rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border);
      padding-top: 1.25rem;
    }
    .hero-meta-points span {
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .hero-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 20px 30px -10px rgba(15, 23, 42, 0.12);
      border: 1px solid var(--border);
      background-color: #000;
    }
    .hero-media img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      opacity: 0.95;
    }
    .hero-media-tag {
      position: absolute;
      bottom: 1rem;
      left: 1rem;
      background: rgba(15, 23, 42, 0.8);
      backdrop-filter: blur(8px);
      color: #FFF;
      font-size: 0.75rem;
      padding: 0.4rem 0.85rem;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    /* [板块 2] 架构介绍区 */
    .arch-section {
      background-color: #FFFFFF;
    }
    .arch-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .arch-img-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
    }
    .arch-img-box img {
      width: 100%;
      height: 390px;
      object-fit: cover;
    }
    .specs-list {
      margin-top: 1.5rem;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .specs-item {
      display: flex;
      gap: 1rem;
    }
    .specs-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--primary-subtle);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.75rem;
      margin-top: 0.2rem;
    }
    .specs-item strong {
      color: var(--text-main);
      display: block;
      font-size: 0.95rem;
    }
    .specs-item p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* [板块 3] 已上线核心能力 (6卡片) */
    .adv-section {
      background-color: var(--bg-page);
    }
    .adv-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .adv-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 2rem 1.75rem;
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-float);
      border-color: #CBD5E1;
    }
    .adv-num {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.75rem;
      display: inline-block;
    }
    .adv-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 0.65rem;
      color: var(--text-main);
    }
    .adv-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* [板块 4] 矩阵方案展台 (3卡片) */
    .sol-section {
      background-color: #FFFFFF;
    }
    .sol-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      align-items: stretch;
    }
    .sol-card {
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 2.25rem 2rem;
      display: flex;
      flex-direction: column;
      position: relative;
      background-color: #FFFFFF;
      transition: all 0.25s ease;
    }
    .sol-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 12px 30px -8px rgba(5, 150, 105, 0.15);
      transform: scale(1.02);
    }
    .sol-badge-feat {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background-color: var(--primary);
      color: #FFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.25rem 0.85rem;
      border-radius: 50px;
    }
    .sol-grade {
      font-size: 0.85rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 0.5rem;
    }
    .sol-card h3 {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
    }
    .sol-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
      line-height: 1.55;
    }
    .sol-features {
      list-style: none;
      margin-bottom: 2rem;
      flex-grow: 1;
    }
    .sol-features li {
      font-size: 0.875rem;
      color: var(--text-main);
      margin-bottom: 0.65rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .sol-features li::before {
      content: '✓';
      color: var(--primary);
      font-weight: 700;
    }
    .sol-metric {
      background-color: var(--bg-page);
      padding: 0.75rem 1rem;
      border-radius: var(--radius);
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
    }

    /* [板块 5] 深色案例与研发理念 */
    .dark-section {
      background-color: var(--dark-section);
      color: #F8FAFC;
    }
    .dark-section .section-title {
      color: #FFFFFF;
    }
    .dark-section .section-subtitle {
      color: #94A3B8;
    }
    .pipeline-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 3rem;
      align-items: center;
      margin-top: 1rem;
    }
    .terminal-box {
      background: #000000;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      padding: 1.5rem;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.85rem;
      color: #38BDF8;
      box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    }
    .terminal-header {
      display: flex;
      gap: 6px;
      margin-bottom: 1rem;
      padding-bottom: 0.75rem;
      border-bottom: 1px solid #1E293B;
    }
    .terminal-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #334155;
    }
    .terminal-content p {
      margin-bottom: 0.5rem;
      line-height: 1.6;
    }
    .terminal-content .highlight {
      color: #4ADE80;
    }
    .pipeline-info h3 {
      font-size: 1.45rem;
      font-weight: 700;
      margin-bottom: 1rem;
      color: #FFFFFF;
    }
    .pipeline-info p {
      color: #94A3B8;
      font-size: 0.95rem;
      margin-bottom: 1.5rem;
      line-height: 1.65;
    }

    /* [板块 6] 用户故事与应用场景 */
    .scenario-section {
      background-color: #FFFFFF;
    }
    .scenario-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .scenario-card {
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: #FFFFFF;
      box-shadow: var(--shadow-sm);
    }
    .scenario-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .scenario-body {
      padding: 1.5rem;
    }
    .scenario-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 0.5rem;
      display: block;
    }
    .scenario-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 0.65rem;
    }
    .scenario-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* [板块 7] 关键数据指标 */
    .metrics-bar-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      padding: 3rem 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      text-align: center;
    }
    .metric-item {
      padding: 1rem;
      border-right: 1px solid var(--border);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.1;
      margin-bottom: 0.35rem;
      letter-spacing: -0.03em;
    }
    .metric-number span {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--primary);
    }
    .metric-label {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* [板块 8] 用户评价区 */
    .reviews-section {
      background-color: var(--bg-page);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.85rem;
      box-shadow: var(--shadow-sm);
    }
    .review-quote {
      font-size: 0.925rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 1.25rem;
      position: relative;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 0.85rem;
      border-top: 1px solid var(--border);
      padding-top: 1rem;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    .author-info strong {
      font-size: 0.9rem;
      color: var(--text-main);
      display: block;
    }
    .author-info span {
      font-size: 0.775rem;
      color: var(--text-light);
    }

    /* [板块 9] 规划中与技术动态 */
    .news-section {
      background-color: #FFFFFF;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .news-card {
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 1.5rem;
      transition: border-color 0.2s ease;
    }
    .news-card:hover {
      border-color: var(--primary);
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      color: var(--text-light);
      margin-bottom: 0.75rem;
    }
    .news-tag {
      color: var(--primary);
      font-weight: 600;
    }
    .news-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 0.65rem;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* [板块 10] FAQ 常见问答 */
    .faq-section {
      background-color: var(--bg-page);
    }
    .faq-wrapper {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 0.85rem;
      overflow: hidden;
    }
    .faq-toggle {
      width: 100%;
      padding: 1.25rem 1.5rem;
      text-align: left;
      background: none;
      border: none;
      outline: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
    }
    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.2s ease;
      color: var(--text-light);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
      padding: 0 1.5rem;
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.6;
    }
    .faq-item.active .faq-content {
      max-height: 250px;
      padding: 0 1.5rem 1.25rem 1.5rem;
    }

    /* [板块 11] 保障承诺条 */
    .sla-section {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      padding: 3rem 0;
    }
    .sla-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .sla-item {
      text-align: center;
      padding: 1rem;
    }
    .sla-title {
      font-weight: 700;
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 0.4rem;
    }
    .sla-desc {
      font-size: 0.825rem;
      color: var(--text-muted);
    }

    /* [板块 12] 底部强转化 CTA */
    .cta-section {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      color: #FFFFFF;
      padding: 5rem 0;
      text-align: center;
    }
    .cta-box {
      max-width: 680px;
      margin: 0 auto;
    }
    .cta-box .section-title {
      color: #FFFFFF;
      font-size: 2.25rem;
    }
    .cta-box p {
      color: #94A3B8;
      font-size: 1.05rem;
      margin-bottom: 2rem;
      line-height: 1.6;
    }
    .cta-form {
      display: flex;
      gap: 0.75rem;
      max-width: 480px;
      margin: 0 auto 1.25rem auto;
    }
    .cta-input {
      flex: 1;
      padding: 0.85rem 1.15rem;
      border-radius: var(--radius);
      border: 1px solid #334155;
      background: rgba(255, 255, 255, 0.08);
      color: #FFF;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--primary);
    }
    .cta-hint {
      font-size: 0.775rem;
      color: #64748B;
    }

    /* 底部固定转化条 */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      background: rgba(15, 23, 42, 0.95);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 0.75rem 0;
      z-index: 999;
      transform: translateY(100%);
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .sticky-bar.visible {
      transform: translateY(0);
    }
    .sticky-flex {
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #FFF;
      font-size: 0.9rem;
    }

    /* 页脚 */
    .site-footer {
      background-color: #0B1329;
      color: #94A3B8;
      padding: 4rem 0 2rem 0;
      font-size: 0.875rem;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 3rem;
      margin-bottom: 3rem;
    }
    .footer-brand h4 {
      font-size: 1.15rem;
      color: #FFF;
      margin-bottom: 0.85rem;
      font-weight: 700;
    }
    .footer-brand p {
      line-height: 1.6;
      color: #64748B;
    }
    .footer-col h5 {
      color: #FFF;
      font-size: 0.95rem;
      margin-bottom: 1.15rem;
      font-weight: 600;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col li {
      margin-bottom: 0.5rem;
    }
    .footer-col a {
      color: #64748B;
    }
    .footer-col a:hover {
      color: #CBD5E1;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-container, .pipeline-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .adv-grid, .sol-grid, .scenario-cards, .reviews-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid, .sla-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-media img, .arch-img-box img {
        height: 300px;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu, .nav-cta {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.65rem;
      }
      .adv-grid, .sol-grid, .scenario-cards, .reviews-grid, .news-grid, .metrics-grid, .sla-grid {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border);
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .sol-card.featured {
        transform: none;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .sticky-flex {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
      }
      /* 移动端菜单抽屉 */
      .nav-menu.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 1.5rem;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border);
        gap: 1rem;
      }
    }