/* roulang page: index */
:root {
      --color-primary: #0F2C59;
      --color-primary-dark: #07162c;
      --color-brand-start: #0072FF;
      --color-brand-end: #00C6FF;
      --color-accent-mint: #10B981;
      --color-accent-amber: #F59E0B;
      --color-accent-purple: #6366F1;
      --color-bg-light: #F8FAFC;
      --color-bg-card: #FFFFFF;
      --color-dark-surface: #0B132B;
      --color-text-main: #1E293B;
      --color-text-muted: #64748B;
      --color-border: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --shadow-sm: 0 2px 8px rgba(15, 44, 89, 0.04);
      --shadow-card: 0 10px 30px rgba(15, 44, 89, 0.05);
      --shadow-hover: 0 20px 40px rgba(0, 114, 255, 0.12);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--color-bg-light);
      color: var(--color-text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a { text-decoration: none; color: inherit; transition: var(--transition); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部服务状态条 */
    .topbar {
      height: 38px;
      background-color: #0B1A30;
      color: #94A3B8;
      font-size: 13px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .topbar-tags {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .status-pulse {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #CBD5E1;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--color-accent-mint);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--color-accent-mint);
    }

    /* 主导航 */
    .header-main {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
      height: 74px;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
      font-size: 20px;
      color: var(--color-primary);
    }
    .brand-icon {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--color-brand-start), var(--color-brand-end));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 4px 12px rgba(0, 114, 255, 0.25);
    }
    .brand-badge {
      font-size: 11px;
      background: rgba(0, 114, 255, 0.08);
      color: var(--color-brand-start);
      padding: 2px 8px;
      border-radius: var(--radius-full);
      font-weight: 600;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: #334155;
      padding: 8px 4px;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--color-brand-start);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 24px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      min-height: 44px;
      min-width: 44px;
    }
    .btn-gradient {
      background: linear-gradient(135deg, var(--color-brand-start), var(--color-brand-end));
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(0, 114, 255, 0.25);
    }
    .btn-gradient:hover {
      box-shadow: 0 8px 24px rgba(0, 114, 255, 0.35);
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: #CBD5E1;
      color: var(--color-text-main);
      background: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--color-brand-start);
      color: var(--color-brand-start);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--color-primary);
      cursor: pointer;
    }

    /* 移动端菜单抽屉 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 112px;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(16px);
      padding: 24px;
      z-index: 999;
      flex-direction: column;
      gap: 20px;
    }
    .mobile-drawer.open { display: flex; }
    .mobile-drawer .nav-link { font-size: 18px; padding: 12px 0; border-bottom: 1px solid #F1F5F9; }

    /* 通用板块与排版 */
    .section {
      padding: 96px 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px;
    }
    .section-header.text-left {
      text-align: left;
      margin-left: 0;
    }
    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: rgba(0, 114, 255, 0.08);
      color: var(--color-brand-start);
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .badge-dark {
      background: rgba(255, 255, 255, 0.1);
      color: #38BDF8;
    }
    .section-title {
      font-size: 36px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.3;
      margin-bottom: 18px;
      letter-spacing: -0.02em;
    }
    .section-desc {
      font-size: 16px;
      color: var(--color-text-muted);
      line-height: 1.75;
    }

    /* 模块1: 首屏预约与指标看板 Hero */
    .hero-section {
      padding: 70px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(0, 198, 255, 0.08) 0%, transparent 40%),
                  radial-gradient(circle at 10% 80%, rgba(15, 44, 89, 0.04) 0%, transparent 40%),
                  var(--color-bg-light);
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--color-primary);
      margin-bottom: 24px;
      letter-spacing: -0.03em;
    }
    .hero-lead {
      font-size: 17px;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-pills {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      padding-top: 24px;
      border-top: 1px solid var(--color-border);
    }
    .hero-pill-item {
      background: #FFFFFF;
      padding: 12px 14px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid #EEF2F6;
    }
    .pill-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--color-brand-start);
      line-height: 1.2;
    }
    .pill-label {
      font-size: 12px;
      color: var(--color-text-muted);
      margin-top: 4px;
    }

    /* 首屏右侧预约/沙箱体验卡片 */
    .hero-booking-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
      border: 1px solid rgba(0, 114, 255, 0.12);
      position: relative;
    }
    .booking-card-head {
      margin-bottom: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .booking-card-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--color-primary);
    }
    .slot-picker {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin: 16px 0;
    }
    .slot-item {
      padding: 10px;
      text-align: center;
      border-radius: var(--radius-sm);
      border: 1px solid var(--color-border);
      background: #F8FAFC;
      font-size: 12px;
      cursor: pointer;
      transition: var(--transition);
    }
    .slot-item:hover, .slot-item.active {
      border-color: var(--color-brand-start);
      background: rgba(0, 114, 255, 0.05);
      color: var(--color-brand-start);
      font-weight: 600;
    }
    .form-group {
      margin-bottom: 14px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }
    .form-input {
      width: 100%;
      height: 42px;
      padding: 0 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #F8FAFC;
      transition: var(--transition);
    }
    .form-input:focus {
      outline: none;
      border-color: var(--color-brand-start);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(0, 114, 255, 0.12);
    }

    /* 模块2: 分类入口 (多端运行引擎分类) */
    .grid-category {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .category-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 30px 24px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .category-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 114, 255, 0.3);
    }
    .category-icon-box {
      width: 54px;
      height: 54px;
      border-radius: 14px;
      background: rgba(0, 114, 255, 0.08);
      color: var(--color-brand-start);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
    }
    .category-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 10px;
    }
    .category-desc {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.65;
      flex-grow: 1;
      margin-bottom: 16px;
    }
    .category-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 12px;
      font-weight: 600;
      color: var(--color-brand-start);
      padding-top: 14px;
      border-top: 1px dashed #E2E8F0;
    }

    /* 模块3: 架构全景与精选推荐 */
    .arch-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-card);
    }
    .arch-img-wrap {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid #E2E8F0;
    }
    .arch-points {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .arch-point-item {
      padding: 16px 20px;
      background: #F8FAFC;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--color-brand-start);
    }
    .arch-point-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .arch-point-desc {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 模块4: 核心跨端能力矩阵 (6大能力) */
    .grid-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 114, 255, 0.35);
    }
    .feature-badge-wrap {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 18px;
    }
    .f-badge {
      font-size: 11px;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      font-weight: 700;
    }
    .f-badge-green { background: #ECFDF5; color: var(--color-accent-mint); }
    .f-badge-blue { background: #EFF6FF; color: var(--color-brand-start); }
    .f-badge-purple { background: #EEF2FF; color: var(--color-accent-purple); }
    .feature-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 12px;
    }
    .feature-text {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.7;
    }

    /* 模块5: 服务矩阵与研发全生命周期 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-stage-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 28px 22px;
      border-top: 4px solid var(--color-brand-start);
      box-shadow: var(--shadow-sm);
      border-left: 1px solid var(--color-border);
      border-right: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
      transition: var(--transition);
    }
    .service-stage-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
    }
    .stage-seq {
      font-size: 12px;
      font-weight: 800;
      color: var(--color-brand-start);
      text-transform: uppercase;
      margin-bottom: 8px;
      letter-spacing: 0.05em;
    }
    .stage-name {
      font-size: 18px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 12px;
    }
    .stage-list {
      list-style: none;
      font-size: 13px;
      color: #475569;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .stage-list li {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .stage-list li::before {
      content: "•";
      color: var(--color-brand-start);
      font-weight: bold;
    }

    /* 模块6: 多端性能看板与对照条 (排行榜/对比) */
    .compare-container {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--color-border);
    }
    .compare-row {
      display: grid;
      grid-template-columns: 200px 1fr 1fr;
      gap: 24px;
      padding: 20px 0;
      border-bottom: 1px solid #F1F5F9;
      align-items: center;
    }
    .compare-row:last-child { border-bottom: none; }
    .compare-metric-name {
      font-weight: 700;
      color: var(--color-primary);
      font-size: 15px;
    }
    .compare-bar-wrap {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .bar-outer {
      height: 12px;
      background: #F1F5F9;
      border-radius: var(--radius-full);
      overflow: hidden;
    }
    .bar-inner-bad {
      height: 100%;
      background: #94A3B8;
      border-radius: var(--radius-full);
    }
    .bar-inner-good {
      height: 100%;
      background: linear-gradient(90deg, var(--color-brand-start), var(--color-brand-end));
      border-radius: var(--radius-full);
    }
    .bar-label {
      font-size: 13px;
      color: var(--color-text-muted);
      display: flex;
      justify-content: space-between;
    }
    .bar-label-highlight {
      color: var(--color-brand-start);
      font-weight: 700;
    }

    /* 模块7: 深度沉浸深色案例区 */
    .section-dark {
      background-color: var(--color-dark-surface);
      color: #FFFFFF;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .case-card {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 36px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-card:hover {
      background: rgba(255, 255, 255, 0.07);
      border-color: rgba(56, 189, 248, 0.4);
      transform: translateY(-4px);
    }
    .case-header-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
    }
    .case-client-tag {
      font-size: 12px;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      background: rgba(56, 189, 248, 0.15);
      color: #38BDF8;
      font-weight: 600;
    }
    .case-headline {
      font-size: 22px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
      line-height: 1.4;
    }
    .case-text {
      font-size: 14px;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .case-stats-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .case-num {
      font-size: 22px;
      font-weight: 800;
      color: #38BDF8;
    }
    .case-label {
      font-size: 12px;
      color: #94A3B8;
      margin-top: 4px;
    }

    /* 模块8: 跨端工程实践故事与实施路径 */
    .story-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .path-steps {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .path-step-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--color-border);
      position: relative;
    }
    .step-badge {
      position: absolute;
      top: -10px;
      left: 20px;
      background: var(--color-primary);
color: #FFFFFF;
      font-size: 11px;
      padding: 2px 10px;
      border-radius: var(--radius-full);
      font-weight: 700;
    }
    .step-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 8px;
      margin-top: 4px;
    }
    .step-desc {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.65;
    }

    /* 模块9: 全网运营指标数据横条 */
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 44px 32px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .metric-col {
      position: relative;
    }
    .metric-col:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 15%;
      height: 70%;
      width: 1px;
      background: #E2E8F0;
    }
    .metric-val {
      font-size: 40px;
      font-weight: 800;
      color: var(--color-primary);
      line-height: 1.1;
      letter-spacing: -0.02em;
    }
    .metric-unit {
      font-size: 20px;
      color: var(--color-brand-start);
      margin-left: 2px;
    }
    .metric-caption {
      font-size: 14px;
      font-weight: 600;
      color: #334155;
      margin-top: 10px;
    }
    .metric-sub {
      font-size: 12px;
      color: var(--color-text-muted);
      margin-top: 4px;
    }

    /* 模块10: 架构师与研发主管技术评价墙 */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testi-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px 26px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .testi-card:hover {
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 114, 255, 0.3);
      transform: translateY(-4px);
    }
    .testi-stars {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 14px;
    }
    .testi-quote {
      font-size: 14px;
      color: #334155;
      line-height: 1.75;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 16px;
      border-top: 1px solid #F1F5F9;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0F2C59, #0072FF);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }
    .testi-meta-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--color-primary);
    }
    .testi-meta-role {
      font-size: 12px;
      color: var(--color-text-muted);
    }

    /* 模块11: 平台技术演进时间轴 */
    .timeline-wrap {
      position: relative;
      max-width: 960px;
      margin: 0 auto;
    }
    .timeline-wrap::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: #E2E8F0;
      transform: translateX(-50%);
    }
    .timeline-item {
      display: flex;
      justify-content: flex-end;
      padding-right: 50px;
      position: relative;
      margin-bottom: 40px;
      width: 50%;
    }
    .timeline-item:nth-child(even) {
      align-self: flex-end;
      margin-left: 50%;
      justify-content: flex-start;
      padding-right: 0;
      padding-left: 50px;
    }
    .timeline-dot {
      position: absolute;
      top: 20px;
      right: -8px;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--color-brand-start);
      border: 3px solid #FFFFFF;
      box-shadow: 0 0 0 2px var(--color-brand-start);
      z-index: 2;
    }
    .timeline-item:nth-child(even) .timeline-dot {
      left: -8px;
      right: auto;
    }
    .timeline-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--color-border);
      width: 100%;
    }
    .timeline-version {
      font-size: 12px;
      font-weight: 800;
      color: var(--color-brand-start);
      margin-bottom: 6px;
    }
    .timeline-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 8px;
    }
    .timeline-desc {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 模块12: 技术深度资讯与工程实践 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .news-img {
      height: 190px;
      width: 100%;
      object-fit: cover;
    }
    .news-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-meta-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: var(--color-text-muted);
      margin-bottom: 12px;
    }
    .news-cat-pill {
      background: rgba(0, 114, 255, 0.08);
      color: var(--color-brand-start);
      padding: 2px 8px;
      border-radius: var(--radius-full);
      font-weight: 600;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-summary {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .news-link-btn {
      font-size: 13px;
      font-weight: 700;
      color: var(--color-brand-start);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 模块13: 常见技术难题解答 FAQ */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--color-primary);
      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: 20px;
      font-weight: 400;
      color: var(--color-brand-start);
      transition: var(--transition);
    }
    details[open] .faq-summary::after {
      content: "−";
      transform: rotate(180deg);
    }
    details[open] .faq-summary {
      border-bottom: 1px solid #F1F5F9;
      background: #FAFCFF;
    }
    .faq-content {
      padding: 20px 24px;
      font-size: 14px;
      color: #475569;
      line-height: 1.8;
      background: #FFFFFF;
    }

    /* 模块14: 平台保障与方案转化申请表单 */
    .contact-card-wrap {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-card);
      overflow: hidden;
    }
    .contact-split {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
    }
    .contact-info-side {
      background: linear-gradient(145deg, #0F2C59, #07162C);
      color: #FFFFFF;
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-form-side {
      padding: 48px;
    }
    .assurance-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin: 32px 0;
    }
    .assurance-item {
      display: flex;
      gap: 16px;
    }
    .assurance-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: rgba(56, 189, 248, 0.2);
      color: #38BDF8;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      flex-shrink: 0;
    }
    .assurance-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .assurance-desc {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }
    .form-grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    /* 全局页脚系统 */
    .footer {
      background: #081120;
      color: #94A3B8;
      padding: 72px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.9fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-brand-title {
      font-size: 19px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-p {
      font-size: 13px;
      line-height: 1.8;
      color: #94A3B8;
      margin-bottom: 20px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 13px;
    }
    .footer-links a:hover {
      color: #38BDF8;
    }
    .footer-cert-tags {
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 12px;
    }
    .cert-pill {
      background: rgba(255, 255, 255, 0.05);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      color: #CBD5E1;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
    }
    .footer-bottom a {
      color: #94A3B8;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .grid-category { grid-template-columns: repeat(2, 1fr); }
      .arch-panel { grid-template-columns: 1fr; }
      .grid-features { grid-template-columns: repeat(2, 1fr); }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .cases-grid { grid-template-columns: 1fr; }
      .story-layout { grid-template-columns: 1fr; }
      .metrics-bar-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
      .metric-col:nth-child(2)::after { display: none; }
      .testi-grid { grid-template-columns: 1fr; }
      .news-grid { grid-template-columns: 1fr; }
      .contact-split { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .timeline-wrap::before { left: 20px; }
      .timeline-item { width: 100%; padding-left: 50px; padding-right: 0; justify-content: flex-start; }
      .timeline-item:nth-child(even) { margin-left: 0; padding-left: 50px; }
      .timeline-dot { left: 12px !important; right: auto !important; }
    }

    @media (max-width: 768px) {
      .topbar { display: none; }
      .header-main { height: 64px; }
      .nav-links { display: none; }
      .mobile-toggle { display: block; }
      .section { padding: 60px 0; }
      .hero-h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .grid-category { grid-template-columns: 1fr; }
      .grid-features { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .hero-pills { grid-template-columns: repeat(2, 1fr); }
      .compare-row { grid-template-columns: 1fr; gap: 12px; }
      .metrics-bar-grid { grid-template-columns: 1fr; }
      .metric-col::after { display: none !important; }
      .form-grid-2 { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
      .contact-info-side, .contact-form-side { padding: 28px 20px; }
      .slot-picker { grid-template-columns: 1fr; }
    }