/* roulang page: index */
:root {
      --primary-dark: #0A2540;
      --primary-midnight: #0B132B;
      --accent-green: #00D084;
      --accent-hover: #00b371;
      --accent-cyan: #00E5FF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark-card: #14213D;
      --border-color: #E2E8F0;
      --border-dark: #2A3B5C;
      --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(10, 37, 64, 0.07);
      --shadow-lg: 0 16px 36px rgba(10, 37, 64, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

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

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

    /* 容器规范 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
      border-bottom: 1px solid var(--border-color);
    }

    .top-bar {
      background: var(--primary-midnight);
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-links span {
      margin-right: 18px;
    }

    .main-nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

    .brand-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent-green), #00A389);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 900;
      box-shadow: 0 4px 10px rgba(0, 208, 132, 0.35);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .nav-item {
      font-size: 0.9375rem;
      font-weight: 500;
      color: #334155;
      padding: 8px 4px;
      position: relative;
    }

    .nav-item:hover, .nav-item.active {
      color: #0A2540;
      font-weight: 600;
    }

    .nav-item::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-green);
      transition: var(--transition);
    }

    .nav-item:hover::after, .nav-item.active::after {
      width: 100%;
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-primary {
      background: var(--accent-green);
      color: #03281E;
      font-weight: 700;
      font-size: 0.9375rem;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid transparent;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(0, 208, 132, 0.3);
      transition: var(--transition);
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      color: #000000;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(0, 208, 132, 0.4);
    }

    .btn-secondary {
      background: #FFFFFF;
      color: var(--primary-dark);
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-secondary:hover {
      border-color: #94A3B8;
      background: #F8FAFC;
      transform: translateY(-2px);
    }

    .btn-outline-glow {
      background: transparent;
      color: #FFFFFF;
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.35);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-outline-glow:hover {
      border-color: var(--accent-green);
      background: rgba(0, 208, 132, 0.1);
      color: var(--accent-green);
    }

    /* 移动端菜单控制 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--primary-dark);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 通用板块标题层级 */
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px auto;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      color: #007A4D;
      background: #E6FBF2;
      padding: 4px 14px;
      border-radius: var(--radius-pill);
      letter-spacing: 0.5px;
      margin-bottom: 12px;
      text-transform: uppercase;
      border: 1px solid rgba(0, 208, 132, 0.25);
    }

    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 通用Section布局 */
    .site-section {
      padding: 80px 0;
      position: relative;
    }

    .section-bg-light {
      background-color: var(--bg-light);
    }

    .section-bg-white {
      background-color: #FFFFFF;
    }

    .section-bg-dark {
      background-color: var(--primary-midnight);
      color: #E2E8F0;
    }

    /* 板块 1: Hero 首屏视觉锚点与组团转化 */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #071526 0%, #0A2540 60%, #0D3B66 100%);
      color: #FFFFFF;
      padding: 80px 0 90px 0;
      overflow: hidden;
    }

    .hero-bg-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.18;
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .hero-badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 208, 132, 0.15);
      border: 1px solid rgba(0, 208, 132, 0.35);
      color: var(--accent-green);
      font-size: 0.875rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero-title span {
      color: var(--accent-green);
    }

    .hero-desc {
      font-size: 1.075rem;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 28px;
      max-width: 620px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
    }

    /* 拼团与组团转化特有卡 */
    .hero-group-card {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 18px 22px;
      backdrop-filter: blur(8px);
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 540px;
    }

    .group-avatar-stack {
      display: flex;
      align-items: center;
    }

    .group-avatar {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 2px solid #0A2540;
      background: #334155;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      font-weight: bold;
      color: #FFFFFF;
      margin-left: -8px;
    }

    .group-avatar:first-child {
      margin-left: 0;
      background: #0284C7;
    }

    .group-avatar:nth-child(2) { background: #0D9488; }
    .group-avatar:nth-child(3) { background: #D97706; }

    .group-info-text {
      font-size: 0.875rem;
      color: #E2E8F0;
      margin-left: 12px;
    }

    .group-info-text strong {
      color: var(--accent-green);
    }

    .hero-visual-card {
      position: relative;
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }

    .hero-media-cover {
      width: 100%;
      height: 380px;
      object-fit: cover;
      filter: contrast(1.05) brightness(0.95);
    }

    .hero-floating-stat {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(10, 37, 64, 0.92);
      border: 1px solid rgba(0, 208, 132, 0.4);
      border-radius: var(--radius-md);
      padding: 14px 18px;
      backdrop-filter: blur(12px);
      display: flex;
      justify-content: space-around;
      text-align: center;
    }

    .floating-item h4 {
      color: var(--accent-green);
      font-size: 1.25rem;
      font-weight: 800;
    }

    .floating-item p {
      font-size: 0.75rem;
      color: #94A3B8;
    }

    /* 板块 2: 痛点与诊断区 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .pain-card:hover {
      border-color: #CBD5E1;
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .pain-icon-wrapper {
      width: 52px;
      height: 52px;
      border-radius: 10px;
      background: #FEF2F2;
      color: #EF4444;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 20px;
    }

    .pain-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }

    .pain-desc {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 3: 技术架构与模型管线图 */
    .arch-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .arch-image-box {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }

    .arch-image-box img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }

    .arch-tag-pill {
      position: absolute;
      top: 16px;
      right: 16px;
      background: rgba(10, 37, 64, 0.85);
      color: var(--accent-green);
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      font-size: 0.8125rem;
      font-weight: 600;
      border: 1px solid rgba(0, 208, 132, 0.4);
    }

    .arch-content h3 {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1.35;
      margin-bottom: 18px;
    }

    .arch-content p {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
    }

    .spec-item-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 28px;
    }

    .spec-item {
      background: #F1F5F9;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--accent-green);
    }

    .spec-item strong {
      display: block;
      font-size: 1rem;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .spec-item span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 板块 4: 6大技术与服务优势 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .feature-card:hover {
      border-color: rgba(0, 208, 132, 0.5);
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .feature-card-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 18px;
    }

    .feature-icon-circle {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #F0FDF4;
      color: #16A34A;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: bold;
    }

    .feature-chip {
      font-size: 0.75rem;
      font-weight: 600;
      color: #475569;
      background: #F1F5F9;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
    }

    .feature-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }

    .feature-desc {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块 5: 主打产品矩阵与方案 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .product-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .product-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }

    .product-media {
      position: relative;
      height: 210px;
      overflow: hidden;
    }

    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .product-card:hover .product-media img {
      transform: scale(1.05);
    }

    .product-body {
      padding: 26px 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .product-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: #0284C7;
      background: #E0F2FE;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      align-self: flex-start;
      margin-bottom: 12px;
    }

    .product-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 10px;
    }

    .product-desc {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }

    .product-checklist {
      margin-top: auto;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      margin-bottom: 20px;
    }

    .product-checklist li {
      font-size: 0.85rem;
      color: #475569;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .product-checklist li::before {
      content: '✓';
      color: var(--accent-green);
      font-weight: bold;
    }

    /* 板块 6: 端侧算法底层理念与深色对比 */
    .dark-tech-section {
      background: var(--primary-midnight);
      color: #F8FAFC;
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
    }

    .dark-tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .tech-console-box {
      background: #050B18;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      font-family: SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }

    .console-header {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid #1E293B;
    }

    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .console-dot.red { background: #EF4444; }
    .console-dot.yellow { background: #F59E0B; }
    .console-dot.green { background: #10B981; }

    .console-code {
      font-size: 0.85rem;
      line-height: 1.7;
      color: #A5B4FC;
    }

    .console-code .hl-green { color: var(--accent-green); }
    .console-code .hl-cyan { color: var(--accent-cyan); }
    .console-code .hl-gray { color: #64748B; }

    .dark-tech-content h3 {
      font-size: 2rem;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.3;
      margin-bottom: 18px;
    }

    .dark-tech-content p {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.75;
      margin-bottom: 24px;
    }

    .tech-metric-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .tech-metric-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 16px;
    }

    .tech-metric-card .num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 4px;
    }

    .tech-metric-card .label {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    /* 板块 7: 四步标准化接入流程 */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .workflow-timeline::before {
      content: '';
      position: absolute;
      top: 38px;
      left: 60px;
      right: 60px;
      height: 2px;
      background: #E2E8F0;
      z-index: 1;
    }

    .workflow-step {
      position: relative;
      z-index: 2;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 22px 24px 22px;
      text-align: center;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .workflow-step:hover {
      transform: translateY(-4px);
      border-color: var(--accent-green);
      box-shadow: var(--shadow-md);
    }

    .step-badge {
      width: 48px;
      height: 48px;
      margin: 0 auto 18px auto;
      border-radius: 50%;
      background: var(--primary-dark);
      color: var(--accent-green);
      font-size: 1.15rem;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 4px solid #FFFFFF;
      box-shadow: 0 0 0 2px var(--border-color);
    }

    .step-title {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 10px;
    }

    .step-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 8: 商业客户落地案例 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .case-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .case-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }

    .case-cover-wrap {
      height: 200px;
      position: relative;
      overflow: hidden;
    }

    .case-cover-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-client-tag {
      position: absolute;
      bottom: 12px;
      left: 12px;
      background: rgba(10, 37, 64, 0.9);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
    }

    .case-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .case-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }

    .case-metrics-badge {
      background: #F0FDF4;
      border: 1px solid rgba(0, 208, 132, 0.25);
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      margin-bottom: 14px;
      font-size: 0.85rem;
      color: #166534;
      font-weight: 600;
    }

    .case-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 9: 核心运营数据统计条 */
    .metrics-bar-section {
      background: linear-gradient(90deg, #0A2540 0%, #11355A 100%);
      color: #FFFFFF;
      padding: 56px 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }

    .metric-item {
      padding: 0 16px;
      border-right: 1px solid rgba(255, 255, 255, 0.12);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-num {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--accent-green);
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }

    .metric-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 4px;
    }

    .metric-note {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    /* 板块 10: 客户评价与证言网格 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testi-quote {
      font-size: 0.95rem;
      color: #334155;
      line-height: 1.75;
      margin-bottom: 22px;
      position: relative;
    }

    .testi-quote::before {
      content: '“';
      font-size: 2.4rem;
      color: var(--accent-green);
      line-height: 1;
      opacity: 0.35;
      display: block;
      margin-bottom: -10px;
    }

    .testi-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .testi-avatar-circle {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      color: var(--primary-dark);
      font-weight: bold;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
    }

    .testi-meta strong {
      display: block;
      font-size: 0.9375rem;
      color: var(--primary-dark);
    }

    .testi-meta span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 11: 资讯与技术前沿动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-bottom: 36px;
    }

    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .news-card-img {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }

    .news-body {
      padding: 22px 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: 0.8rem;
      color: #94A3B8;
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary-dark);
      line-height: 1.45;
      margin-bottom: 10px;
    }

    .news-snippet {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .news-read-more {
      margin-top: auto;
      font-size: 0.85rem;
      font-weight: 700;
      color: #0284C7;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .news-bottom-action {
      text-align: center;
    }

    /* 板块 12: FAQ 手风琴互动 */
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item[open] {
      border-color: rgba(0, 208, 132, 0.45);
      box-shadow: var(--shadow-sm);
    }

    .faq-summary {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      list-style: none;
    }

    .faq-summary::-webkit-details-marker {
      display: none;
    }

    .faq-icon-arrow {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #F1F5F9;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      color: #64748B;
      transition: var(--transition);
    }

    .faq-item[open] .faq-icon-arrow {
      transform: rotate(180deg);
      background: var(--accent-green);
      color: #000000;
    }

    .faq-answer {
      padding: 0 24px 22px 24px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    /* 板块 13: 商业咨询表单与行动召唤 */
    .contact-card-box {
      background: linear-gradient(135deg, #0A2540 0%, #14213D 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 48px;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }

    .contact-info h3 {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
    }

    .contact-info p {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 28px;
    }

    .contact-highlight-bullets li {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 0.9375rem;
      color: #E2E8F0;
    }

    .contact-highlight-bullets li span {
      color: var(--accent-green);
      font-weight: bold;
    }

    .form-container {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px 28px;
      color: var(--text-main);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    }

    .form-container h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 6px;
    }

    .form-container p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      color: var(--text-main);
      background-color: #F8FAFC;
      transition: var(--transition);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--accent-green);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(0, 208, 132, 0.15);
    }

    .form-textarea {
      resize: vertical;
      min-height: 80px;
    }

    .form-submit-btn {
      width: 100%;
      background: var(--accent-green);
      color: #03281E;
      font-size: 1rem;
      font-weight: 700;
      padding: 12px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(0, 208, 132, 0.35);
      transition: var(--transition);
    }

    .form-submit-btn:hover {
      background: var(--accent-hover);
      color: #000000;
    }

    /* 页脚设计 */
    .site-footer {
      background: #060E18;
      color: #94A3B8;
      padding-top: 70px;
      padding-bottom: 30px;
      font-size: 0.875rem;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand .footer-logo-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .footer-brand p {
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 20px;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
      position: relative;
    }

    .footer-col h5::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 24px;
      height: 2px;
      background: var(--accent-green);
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a:hover {
      color: var(--accent-green);
      padding-left: 4px;
    }

    .footer-contact-info p {
      margin-bottom: 8px;
      line-height: 1.6;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
      color: #475569;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-wrapper, .dark-tech-grid, .contact-card-box {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .features-grid, .products-grid, .cases-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-timeline::before {
        display: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-item {
        width: 100%;
        padding: 10px 0;
      }
      .nav-cta {
        display: none;
      }
      .pain-grid, .features-grid, .products-grid, .cases-grid, .testimonials-grid, .news-grid, .metrics-grid, .workflow-timeline {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        padding-bottom: 20px;
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .hero-title {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .contact-card-box {
        padding: 30px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .spec-item-list {
        grid-template-columns: 1fr;
      }
    }