/* roulang page: index */
:root {
      --navy-900: #0B0F19;
      --navy-800: #0F172A;
      --navy-700: #1E293B;
      --blue-600: #2563EB;
      --blue-700: #1D4ED8;
      --blue-50: #EFF6FF;
      --slate-50: #F8FAFC;
      --slate-100: #F1F5F9;
      --slate-200: #E2E8F0;
      --slate-400: #94A3B8;
      --slate-600: #475569;
      --slate-700: #334155;
      --slate-800: #1E293B;
      --amber-500: #F59E0B;
      --emerald-600: #059669;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.07);
      --shadow-lg: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
      --ease: cubic-bezier(0.16, 1, 0.3, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      color: var(--slate-700);
      background-color: #FFFFFF;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s var(--ease);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
    }

    /* 容器基准 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-wrap {
      padding-top: 85px;
      padding-bottom: 85px;
    }
    .bg-light {
      background-color: var(--slate-50);
    }
    .bg-white {
      background-color: #FFFFFF;
    }
    .bg-dark {
      background-color: var(--navy-900);
      color: #F8FAFC;
    }

    /* 标题与板块引导 */
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 600;
      color: var(--blue-600);
      background-color: var(--blue-50);
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
      border: 1px solid rgba(37, 99, 235, 0.15);
    }
    .bg-dark .section-tag {
      background-color: rgba(37, 99, 235, 0.2);
      color: #93C5FD;
      border-color: rgba(147, 197, 253, 0.25);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      color: var(--navy-800);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .bg-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 15.5px;
      color: var(--slate-600);
      line-height: 1.8;
    }
    .bg-dark .section-desc {
      color: #94A3B8;
    }

    /* 导航栏 */
    .top-bar {
      background-color: var(--navy-800);
      color: #CBD5E1;
      font-size: 12.5px;
      padding: 7px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-meta-list {
      display: flex;
      gap: 22px;
      list-style: none;
    }
    .top-meta-list li span {
      color: #94A3B8;
      margin-right: 5px;
    }
    .main-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--slate-200);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--navy-900);
      letter-spacing: -0.5px;
    }
    .site-logo svg {
      width: 32px;
      height: 32px;
      fill: var(--blue-600);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 14.5px;
      font-weight: 500;
      color: var(--slate-700);
      position: relative;
      padding: 8px 0;
    }
    .nav-menu a:hover {
      color: var(--blue-600);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--slate-200);
      padding: 8px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }
    .mobile-menu-btn svg {
      width: 22px;
      height: 22px;
      stroke: var(--slate-800);
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-size: 14.5px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s var(--ease);
      border: 1px solid transparent;
      white-space: nowrap;
    }
    .btn:active {
      transform: translateY(1px);
    }
    .btn-primary {
      background-color: var(--blue-600);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--blue-700);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
    }
    .btn-outline {
      background-color: transparent;
      border-color: var(--slate-200);
      color: var(--slate-700);
    }
    .btn-outline:hover {
      border-color: var(--blue-600);
      color: var(--blue-600);
      background-color: var(--blue-50);
    }
    .btn-dark {
      background-color: var(--navy-800);
      color: #FFFFFF;
    }
    .btn-dark:hover {
      background-color: var(--navy-700);
    }
    .btn-white {
      background-color: #FFFFFF;
      color: var(--navy-900);
    }
    .btn-white:hover {
      background-color: var(--slate-100);
    }

    /* 1. HERO 首屏 */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
      padding: 70px 0 90px;
      border-bottom: 1px solid var(--slate-200);
      overflow: hidden;
    }
    .hero-banner-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }
    .hero-flash-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      padding: 6px 14px;
      border-radius: 999px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--slate-200);
      font-size: 13px;
      font-weight: 600;
      color: var(--slate-800);
      margin-bottom: 18px;
    }
    .hero-flash-pill .badge {
      background: #DC2626;
      color: #fff;
      font-size: 11px;
      padding: 2px 7px;
      border-radius: 4px;
      font-weight: 700;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--navy-900);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      color: var(--blue-600);
    }
    .hero-desc {
      font-size: 16px;
      color: var(--slate-600);
      line-height: 1.85;
      margin-bottom: 30px;
    }
    .hero-btn-group {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 34px;
    }
    .hero-metrics-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid rgba(148, 163, 184, 0.25);
    }
    .hero-metric-item h4 {
      font-size: 26px;
      font-weight: 800;
      color: var(--navy-900);
      line-height: 1.2;
    }
    .hero-metric-item p {
      font-size: 13px;
      color: var(--slate-600);
      margin-top: 4px;
    }
    .hero-stage {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--slate-200);
      background-color: #FFFFFF;
    }
    .hero-stage img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .hero-stage-badge {
      position: absolute;
      bottom: 18px;
      left: 18px;
      right: 18px;
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(8px);
      padding: 14px 18px;
      border-radius: var(--radius-md);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .hero-stage-badge span {
      font-size: 13.5px;
      font-weight: 600;
    }
    .hero-stage-badge small {
      color: #94A3B8;
      font-size: 12px;
    }

    /* 2. INTRO 信任背书与资质 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .intro-image-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .intro-image-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .intro-badge-float {
      position: absolute;
      top: 18px;
      right: 18px;
      background: #FFFFFF;
      padding: 10px 16px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-md);
      border-left: 4px solid var(--blue-600);
      font-size: 13px;
      font-weight: 700;
      color: var(--navy-800);
    }
    .trust-credential-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 26px;
    }
    .trust-card {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      padding: 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }
    .trust-card h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--navy-800);
      margin-bottom: 6px;
    }
    .trust-card p {
      font-size: 13px;
      color: var(--slate-600);
      line-height: 1.6;
    }

    /* 3. ADVANTAGES 六大业务优势 (3x2 网格) */
    .cards-grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.28s var(--ease);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.4);
    }
    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background-color: var(--blue-50);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .feature-icon-box svg {
      width: 24px;
      height: 24px;
      stroke: var(--blue-600);
      fill: none;
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--navy-800);
      margin-bottom: 10px;
    }
    .feature-card p {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .feature-footer-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--blue-600);
      background: var(--blue-50);
      align-self: flex-start;
      padding: 3px 10px;
      border-radius: 4px;
    }

    /* 4. PRODUCTS 核心产品矩阵 */
    .product-cards-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s var(--ease);
      display: flex;
      flex-direction: column;
    }
    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .product-img-holder {
      height: 200px;
      overflow: hidden;
    }
    .product-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s var(--ease);
    }
    .product-card:hover .product-img-holder img {
      transform: scale(1.05);
    }
    .product-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-code {
      font-size: 12px;
      font-weight: 700;
      color: var(--blue-600);
      letter-spacing: 1px;
      margin-bottom: 6px;
    }
    .product-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--navy-900);
      margin-bottom: 10px;
    }
    .product-desc {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .product-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
      padding-top: 14px;
      border-top: 1px solid var(--slate-100);
    }
    .product-tags span {
      font-size: 12px;
      color: var(--slate-600);
      background-color: var(--slate-100);
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 5. SCENARIOS 业务使用场景 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .scenario-box {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-md);
      padding: 26px;
      border-left: 5px solid var(--blue-600);
      transition: all 0.25s var(--ease);
    }
    .scenario-box:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .scenario-step-no {
      font-size: 12px;
      font-weight: 800;
      color: var(--blue-600);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .scenario-box h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--navy-900);
      margin-bottom: 10px;
    }
    .scenario-box p {
      font-size: 14px;
      color: var(--slate-600);
      line-height: 1.7;
      margin-bottom: 14px;
    }
    .scenario-checklist {
      list-style: none;
      font-size: 13px;
      color: var(--slate-700);
    }
    .scenario-checklist li {
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .scenario-checklist li::before {
      content: "✓";
      color: var(--emerald-600);
      font-weight: bold;
    }

    /* 6. TERMINAL 多端协同演示区 */
    .terminal-display {
      background: var(--navy-800);
      border-radius: var(--radius-lg);
      padding: 36px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .terminal-media {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 10px 25px rgba(0,0,0,0.3);
    }
    .terminal-media img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }
    .terminal-info h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .terminal-info p {
      font-size: 15px;
      color: #94A3B8;
      line-height: 1.75;
      margin-bottom: 22px;
    }
    .terminal-feats {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .term-feat-item {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 12px 14px;
      border-radius: var(--radius-sm);
    }
    .term-feat-item h5 {
      font-size: 14px;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .term-feat-item small {
      font-size: 12px;
      color: #94A3B8;
      display: block;
    }

    /* 7. TECHNOLOGY 底层架构 (深色大板块) */
    .tech-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      margin-top: 36px;
    }
    .tech-card {
      background: rgba(30, 41, 59, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 24px;
      border-radius: var(--radius-md);
      backdrop-filter: blur(6px);
      transition: all 0.25s var(--ease);
    }
    .tech-card:hover {
      background: rgba(30, 41, 59, 0.95);
      border-color: var(--blue-600);
      transform: translateY(-4px);
    }
    .tech-card .tech-val {
      font-size: 32px;
      font-weight: 800;
      color: #60A5FA;
      margin-bottom: 6px;
      line-height: 1.2;
    }
    .tech-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 8px;
    }
    .tech-card p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.65;
    }

    /* 8. STORIES 客户案例 */
    .story-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: center;
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .story-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 320px;
    }
    .story-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-content h3 {
      font-size: 24px;
      font-weight: 700;
      color: var(--navy-900);
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .story-content p {
      font-size: 14.5px;
      color: var(--slate-600);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .story-kpi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding: 16px;
      background: var(--slate-50);
      border-radius: var(--radius-sm);
      border: 1px solid var(--slate-200);
    }
    .story-kpi-item h5 {
      font-size: 22px;
      font-weight: 800;
      color: var(--blue-600);
    }
    .story-kpi-item span {
      font-size: 12px;
      color: var(--slate-600);
    }

    /* 9. METRICS 关键运营指标 */
    .metrics-banner {
      background: linear-gradient(90deg, #1E293B 0%, #0F172A 100%);
      color: #FFFFFF;
      padding: 50px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .metrics-strip-inner {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metric-data-block .metric-num {
      font-size: 38px;
      font-weight: 800;
      color: #38BDF8;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-data-block .metric-lbl {
      font-size: 14px;
      color: #CBD5E1;
      font-weight: 500;
    }

    /* 10. PRICING 方案对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
      align-items: stretch;
    }
    .pricing-card {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: all 0.28s var(--ease);
    }
    .pricing-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .pricing-card.featured {
      border: 2px solid var(--blue-600);
      box-shadow: var(--shadow-md);
    }
    .pricing-tag-pop {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--blue-600);
      color: #FFFFFF;
      font-size: 11.5px;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 999px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .pricing-name {
      font-size: 20px;
      font-weight: 700;
      color: var(--navy-900);
      margin-bottom: 8px;
    }
    .pricing-desc {
      font-size: 13.5px;
      color: var(--slate-600);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .pricing-price {
      font-size: 32px;
      font-weight: 800;
      color: var(--navy-900);
      margin-bottom: 24px;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--slate-100);
    }
    .pricing-price small {
      font-size: 13px;
      color: var(--slate-600);
      font-weight: normal;
    }
    .pricing-features-list {
      list-style: none;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .pricing-features-list li {
      font-size: 13.5px;
      color: var(--slate-700);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pricing-features-list li svg {
      width: 16px;
      height: 16px;
      stroke: var(--emerald-600);
      flex-shrink: 0;
    }

    /* 11. TESTIMONIALS 口碑评价墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-md);
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.25s var(--ease);
    }
    .testi-card:hover {
      box-shadow: var(--shadow-sm);
      border-color: #CBD5E1;
    }
    .testi-stars {
      color: var(--amber-500);
      margin-bottom: 12px;
      letter-spacing: 2px;
      font-size: 14px;
    }
    .testi-card p {
      font-size: 14px;
      color: var(--slate-700);
      line-height: 1.75;
      margin-bottom: 20px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 14px;
      border-top: 1px solid var(--slate-100);
    }
    .testi-avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--blue-50);
      color: var(--blue-600);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
    }
    .testi-info h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--navy-900);
    }
    .testi-info small {
      font-size: 12px;
      color: var(--slate-600);
    }

    /* 12. NEWS 资讯与迭代 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.25s var(--ease);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 22px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 12px;
      color: var(--slate-400);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--navy-900);
      line-height: 1.45;
      margin-bottom: 10px;
    }
    .news-excerpt {
      font-size: 13.5px;
      color: var(--slate-600);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--blue-600);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 13. FAQ 问答手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--slate-200);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: all 0.25s var(--ease);
    }
    .faq-item details summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--navy-800);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-item details summary::-webkit-details-marker {
      display: none;
    }
    .faq-item details summary::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--slate-400);
      transition: transform 0.2s var(--ease);
    }
    .faq-item details[open] summary::after {
      content: "−";
      color: var(--blue-600);
    }
    .faq-body {
      padding: 0 24px 22px;
      font-size: 14.5px;
      color: var(--slate-600);
      line-height: 1.8;
      border-top: 1px solid var(--slate-100);
      padding-top: 16px;
    }

    /* 转化区 CTA */
    .cta-strip {
      background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-800) 100%);
      color: #FFFFFF;
      padding: 70px 0;
      text-align: center;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .cta-inner {
      max-width: 760px;
      margin: 0 auto;
    }
    .cta-inner h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .cta-inner p {
      font-size: 16px;
      color: #94A3B8;
      margin-bottom: 30px;
      line-height: 1.7;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 页脚 FOOTER */
    .site-footer {
      background: #06090F;
      color: #94A3B8;
      font-size: 13.5px;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-logo {
      font-size: 20px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-links-list {
      list-style: none;
    }
    .footer-links-list li {
      margin-bottom: 10px;
    }
    .footer-links-list li a:hover {
      color: #FFFFFF;
    }
    .footer-contact-info p {
      margin-bottom: 10px;
      line-height: 1.6;
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 12.5px;
    }
    .footer-bottom a:hover {
      color: #CBD5E1;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-banner-grid, .intro-grid, .terminal-display, .story-layout {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .cards-grid-3x2, .product-cards-row, .scenario-grid, .testimonial-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .tech-matrix, .metrics-strip-inner {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--slate-200);
        box-shadow: var(--shadow-lg);
        gap: 16px;
      }
      .nav-menu.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .cards-grid-3x2, .product-cards-row, .scenario-grid, .testimonial-grid, .news-grid, .trust-credential-list {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap {
        padding-top: 55px;
        padding-bottom: 55px;
      }
      .hero-metrics-strip {
        grid-template-columns: 1fr;
      }
    }