/* roulang page: index */
:root {
      --primary: #1B365D;
      --primary-light: #24497d;
      --primary-dark: #10233f;
      --accent: #00A389;
      --accent-hover: #008772;
      --warning: #F26419;
      --warning-hover: #d9530e;
      --bg-base: #F7F9FC;
      --bg-white: #FFFFFF;
      --bg-dark: #0E1726;
      --bg-dark-card: #172439;
      --text-main: #0F172A;
      --text-body: #2D3748;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-dark: #27374D;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 20px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 16px 36px rgba(15, 23, 42, 0.09);
      --shadow-dark: 0 12px 30px rgba(0, 0, 0, 0.35);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

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

    body {
      font-family: var(--font-stack);
      line-height: 1.75;
      color: var(--text-body);
      background-color: var(--bg-base);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.25s ease, background 0.25s ease;
    }

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

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

    @media (max-width: 768px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* 顶部通栏 */
    .top-bar {
      background: var(--primary-dark);
      color: #94A3B8;
      font-size: 0.85rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      position: relative;
      z-index: 100;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 8px;
      padding-bottom: 8px;
      flex-wrap: wrap;
      gap: 12px;
    }

    .top-bar-info {
      display: flex;
      align-items: center;
      gap: 24px;
      flex-wrap: wrap;
    }

    .top-bar-info span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .top-bar-meta {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    /* 导航栏 */
    .site-header {
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 99;
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 76px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-logo-badge {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-weight: 700;
      font-size: 1.25rem;
      letter-spacing: -0.5px;
    }

    .brand-logo-text {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }

    .brand-sub {
      font-size: 0.75rem;
      color: var(--text-muted);
      letter-spacing: 0.5px;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 6px 0;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }

    .nav-link.active::after, .nav-link:hover::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent);
      border-radius: 2px;
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 8px 12px;
      cursor: pointer;
      font-size: 1.2rem;
      color: var(--text-main);
    }

    /* 按钮通用体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 24px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
      min-height: 44px;
      min-width: 44px;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(27, 54, 93, 0.2);
    }

    .btn-primary:hover {
      background-color: var(--primary-light);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(27, 54, 93, 0.3);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
    }

    .btn-warning {
      background-color: var(--warning);
      color: #FFFFFF;
    }

    .btn-warning:hover {
      background-color: var(--warning-hover);
      transform: translateY(-2px);
    }

    .btn-outline {
      background-color: transparent;
      border-color: var(--border-color);
      color: var(--text-body);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: rgba(27, 54, 93, 0.04);
    }

    .btn-outline-white {
      background-color: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
    }

    .btn-outline-white:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
    }

    .btn-sm {
      padding: 7px 16px;
      font-size: 0.85rem;
      min-height: 38px;
    }

    /* 倒计时通告条 */
    .announcement-bar {
      background: linear-gradient(90deg, #10233F 0%, #1B365D 50%, #0E1726 100%);
      color: #E2E8F0;
      padding: 10px 0;
      font-size: 0.88rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .announcement-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .timer-badge-group {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(242, 100, 25, 0.15);
      border: 1px solid rgba(242, 100, 25, 0.35);
      padding: 2px 10px;
      border-radius: 4px;
      color: #FFB380;
      font-weight: 600;
    }

    .countdown-boxes {
      display: inline-flex;
      gap: 4px;
      font-variant-numeric: tabular-nums;
    }

    .countdown-boxes span {
      background: #000;
      color: #fff;
      padding: 2px 6px;
      border-radius: 3px;
      font-size: 0.8rem;
    }

    /* 全局 Section 规整 */
    section {
      padding: 80px 0;
      position: relative;
    }

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

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

    .section-dark {
      background-color: var(--bg-dark);
      color: #F8FAFC;
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--accent);
      letter-spacing: 1px;
      margin-bottom: 12px;
      background: rgba(0, 163, 137, 0.1);
      padding: 4px 12px;
      border-radius: 20px;
    }

    .section-dark .section-eyebrow {
      background: rgba(0, 163, 137, 0.2);
    }

    .section-title {
      font-size: 2.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .section-dark .section-title {
      color: #FFFFFF;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.75;
    }

    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* Hero：蓝图指定优惠券墙入口 + 主券放大 */
    .hero-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 60px 0 80px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-bg-overlay {
      position: absolute;
      top: 0;
      right: 0;
      width: 50%;
      height: 100%;
      opacity: 0.12;
      background-image: url('/assets/images/8b7d0e2d7e38f415.webp');
      background-size: cover;
      background-position: center;
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.05fr 0.95fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    .hero-content {
      max-width: 640px;
    }

    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background: #EEF2F6;
      border-radius: 30px;
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-badge-tag .dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }

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

    .hero-lead {
      font-size: 1.1rem;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-quick-specs {
      display: flex;
      gap: 24px;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      flex-wrap: wrap;
    }

    .quick-spec-item strong {
      display: block;
      font-size: 1.3rem;
      color: var(--primary);
      font-variant-numeric: tabular-nums;
    }

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

    /* 蓝图特定组件：巡检机器人部署权益补贴墙 (主券放大 + 阶梯券) */
    .coupon-wall-container {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .coupon-wall-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 14px;
      border-bottom: 1px dashed var(--border-color);
    }

    .coupon-wall-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .coupon-wall-badge {
      font-size: 0.78rem;
      background: #FFF1E6;
      color: var(--warning);
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid rgba(242, 100, 25, 0.3);
    }

    .coupon-featured-card {
      background: linear-gradient(135deg, #1B365D 0%, #172439 100%);
      border-radius: var(--radius-md);
      padding: 22px;
      color: #FFFFFF;
      margin-bottom: 18px;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 10px 20px rgba(27, 54, 93, 0.25);
    }

    .coupon-featured-card::before, .coupon-featured-card::after {
      content: '';
      position: absolute;
      width: 20px;
      height: 20px;
      background: #FFFFFF;
      border-radius: 50%;
      top: 50%;
      transform: translateY(-50%);
    }

    .coupon-featured-card::before { left: -10px; }
    .coupon-featured-card::after { right: -10px; }

    .coupon-featured-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 12px;
    }

    .coupon-featured-val {
      font-size: 2.2rem;
      font-weight: 800;
      color: #FFB380;
      line-height: 1;
      font-variant-numeric: tabular-nums;
    }

    .coupon-featured-val small {
      font-size: 1rem;
      margin-right: 2px;
    }

    .coupon-featured-type {
      text-align: right;
    }

    .coupon-featured-type h4 {
      font-size: 1.05rem;
      font-weight: 700;
    }

    .coupon-featured-type p {
      font-size: 0.8rem;
      color: #94A3B8;
    }

    .coupon-featured-body {
      font-size: 0.85rem;
      color: #CBD5E1;
      border-top: 1px dashed rgba(255, 255, 255, 0.2);
      padding-top: 12px;
      margin-top: 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .coupon-grid-sub {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 18px;
    }

    .coupon-sub-card {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 12px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }

    .coupon-sub-card:hover {
      border-color: var(--accent);
      background: #F0FDF4;
    }

    .coupon-sub-val {
      color: var(--warning);
      font-weight: 700;
      font-size: 1.25rem;
    }

    .coupon-sub-desc {
      font-size: 0.8rem;
      color: var(--text-body);
      margin-top: 4px;
      line-height: 1.4;
    }

    .coupon-wall-action {
      text-align: center;
    }

    /* 板块二：指标看板与实时数据流 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .metric-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

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

    .metric-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
    }

    .metric-badge {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
      background: #E2E8F0;
      color: var(--text-body);
    }

    .metric-badge.green {
      background: rgba(0, 163, 137, 0.12);
      color: var(--accent);
    }

    .metric-value {
      font-size: 2.35rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      font-variant-numeric: tabular-nums;
      margin-bottom: 8px;
    }

    .metric-label {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .metric-detail {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块三：全球覆盖与工业基地部署 */
    .coverage-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .coverage-img-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .coverage-img-wrap img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .coverage-img-wrap:hover img {
      transform: scale(1.03);
    }

    .coverage-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .coverage-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 14px;
    }

    .coverage-item strong {
      display: block;
      color: var(--primary);
      font-size: 1.1rem;
      margin-bottom: 4px;
    }

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

    /* 板块四：场景卡矩阵 (蓝图必须) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .scenario-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      display: flex;
      flex-direction: column;
    }

    .scenario-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
    }

    .scenario-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }

    .scenario-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s ease;
    }

    .scenario-card:hover .scenario-thumb img {
      transform: scale(1.05);
    }

    .scenario-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 23, 42, 0.85);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      backdrop-filter: blur(4px);
    }

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

    .scenario-body h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .scenario-body p {
      font-size: 0.9rem;
      color: var(--text-body);
      margin-bottom: 18px;
      flex: 1;
      line-height: 1.7;
    }

    .scenario-meta {
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 板块五：本地化实施与工程保障 */
    .local-capability-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .local-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.25s ease;
    }

    .local-card:hover {
      border-color: var(--accent);
      box-shadow: var(--shadow-md);
    }

    .local-icon {
      width: 48px;
      height: 48px;
      border-radius: 8px;
      background: rgba(0, 163, 137, 0.12);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .local-card h4 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .local-card p {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 板块六：核心机型与技术产品矩阵 (服务矩阵) */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .product-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .product-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }

    .product-img {
      height: 220px;
      position: relative;
      overflow: hidden;
      background: #EDF2F7;
    }

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

    .product-status-tag {
      position: absolute;
      bottom: 12px;
      right: 12px;
      background: var(--primary);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 4px;
    }

    .product-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .product-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .product-desc {
      font-size: 0.9rem;
      color: var(--text-body);
      margin-bottom: 18px;
      line-height: 1.7;
    }

    .spec-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }

    .spec-pill {
      font-size: 0.78rem;
      background: #F1F5F9;
      color: #475569;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid #E2E8F0;
    }

    .product-card .btn {
      margin-top: auto;
      width: 100%;
    }

    /* 板块七：传统人工 vs 智能巡检机器人结果对比表 */
    .comparison-container {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .comparison-table th, .comparison-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .comparison-table th {
      background: #F8FAFC;
      color: var(--text-main);
      font-weight: 700;
    }

    .comparison-table th:nth-child(2) {
      color: var(--text-muted);
    }

    .comparison-table th:nth-child(3) {
      background: rgba(0, 163, 137, 0.08);
      color: var(--accent);
      border-left: 2px solid var(--accent);
    }

    .comparison-table td:nth-child(3) {
      background: rgba(0, 163, 137, 0.02);
      border-left: 2px solid var(--accent);
      font-weight: 600;
      color: var(--primary);
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    /* 板块八：深色案例区与严苛环境验证 */
    .dark-case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .dark-case-card {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }

    .dark-case-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-dark);
    }

    .dark-case-img {
      height: 190px;
      position: relative;
    }

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

    .dark-case-body {
      padding: 22px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .dark-case-body h4 {
      font-size: 1.15rem;
      color: #FFFFFF;
      margin-bottom: 10px;
    }

    .dark-case-body p {
      font-size: 0.88rem;
      color: #94A3B8;
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .dark-case-tag {
      font-size: 0.8rem;
      color: var(--accent);
      font-weight: 600;
      margin-top: auto;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块九：标杆客户应用叙事 */
    .story-section-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      box-shadow: var(--shadow-md);
    }

    .story-content {
      padding: 44px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .story-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent);
      background: rgba(0, 163, 137, 0.1);
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 16px;
      width: fit-content;
    }

    .story-title {
      font-size: 1.65rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 16px;
    }

    .story-desc {
      font-size: 0.98rem;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .story-stat-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
    }

    .story-stat-col strong {
      font-size: 1.45rem;
      color: var(--primary);
      display: block;
      font-variant-numeric: tabular-nums;
    }

    .story-stat-col span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .story-media {
      position: relative;
      min-height: 360px;
    }

    .story-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* 板块十：里程碑演进时间轴 */
    .timeline-wrap {
      position: relative;
      max-width: 980px;
      margin: 0 auto;
      padding: 20px 0;
    }

    .timeline-wrap::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: var(--border-color);
      transform: translateX(-50%);
    }

    .timeline-item {
      position: relative;
      margin-bottom: 36px;
      width: 50%;
      padding-right: 40px;
      box-sizing: border-box;
    }

    .timeline-item:nth-child(even) {
      left: 50%;
      padding-right: 0;
      padding-left: 40px;
    }

    .timeline-node {
      position: absolute;
      top: 18px;
      right: -11px;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: var(--bg-white);
      border: 4px solid var(--accent);
      z-index: 2;
    }

    .timeline-item:nth-child(even) .timeline-node {
      right: auto;
      left: -11px;
    }

    .timeline-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
    }

    .timeline-card h4 {
      font-size: 1.15rem;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .timeline-card p {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.65;
    }

    /* 板块十一：技术资讯卡片 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }

    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .news-thumb {
      height: 180px;
      overflow: hidden;
    }

    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s ease;
    }

    .news-card:hover .news-thumb img {
      transform: scale(1.04);
    }

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

    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 10px;
    }

    .news-excerpt {
      font-size: 0.88rem;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 16px;
      flex: 1;
    }

    .news-link-btn {
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块十二：平台维保与工程服务保障 */
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .assurance-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      transition: transform 0.25s ease;
    }

    .assurance-card:hover {
      transform: translateY(-4px);
      border-color: var(--accent);
    }

    .assurance-icon-box {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: #F0FDF4;
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 700;
      margin: 0 auto 16px;
    }

    .assurance-card h4 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .assurance-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块十三：选型与技术答疑 FAQ */
    .faq-container {
      max-width: 880px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item:hover {
      border-color: var(--primary);
    }

    .faq-summary {
      padding: 18px 22px;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-arrow {
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: transform 0.3s ease;
    }

    details[open] .faq-arrow {
      transform: rotate(180deg);
      color: var(--accent);
    }

    .faq-answer {
      padding: 0 22px 20px;
      font-size: 0.92rem;
      color: var(--text-body);
      line-height: 1.75;
      border-top: 1px solid #F1F5F9;
      margin-top: 4px;
      padding-top: 14px;
    }

    /* 板块十四：快速需求评估与定制转化表单 */
    .inquiry-wrap {
      background: linear-gradient(135deg, #1B365D 0%, #10233F 100%);
      border-radius: var(--radius-lg);
      padding: 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1fr 1.25fr;
      gap: 48px;
      align-items: center;
    }

    .inquiry-info h3 {
      font-size: 2rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .inquiry-info p {
      font-size: 0.95rem;
      color: #CBD5E1;
      line-height: 1.75;
      margin-bottom: 24px;
    }

    .inquiry-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.9rem;
      color: #E2E8F0;
    }

    .inquiry-list li {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .inquiry-list-dot {
      width: 6px;
      height: 6px;
      background: var(--accent);
      border-radius: 50%;
    }

    .inquiry-form-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      color: var(--text-body);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group.full {
      grid-column: span 2;
    }

    .form-label {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      color: var(--text-main);
      background: #F8FAFC;
      transition: all 0.2s ease;
    }

    .form-control:focus {
      outline: 2px solid var(--accent);
      outline-offset: 1px;
      background: #FFFFFF;
      border-color: var(--accent);
    }

    select.form-control {
      cursor: pointer;
    }

    /* 页脚 */
    .site-footer {
      background: #0B1320;
      color: #94A3B8;
      border-top: 1px solid #1E293B;
      padding-top: 60px;
      padding-bottom: 30px;
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
      gap: 36px;
      margin-bottom: 48px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      font-size: 1rem;
      color: #FFFFFF;
      margin-bottom: 18px;
      font-weight: 600;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    .footer-contact-item {
      display: flex;
      gap: 8px;
      margin-bottom: 12px;
      line-height: 1.6;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
    }

    .footer-bottom a {
      color: #94A3B8;
    }

    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-grid, .coverage-grid, .story-section-card, .inquiry-wrap {
        grid-template-columns: 1fr;
      }
      .metrics-grid, .assurance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-grid, .local-capability-grid, .products-grid, .dark-case-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .main-nav {
        display: none;
      }
      .main-nav.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .scenario-grid, .local-capability-grid, .products-grid, .dark-case-grid, .news-grid, .metrics-grid, .assurance-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .timeline-wrap::before {
        left: 16px;
      }
      .timeline-item {
        width: 100%;
        padding-left: 44px;
        padding-right: 0;
      }
      .timeline-item:nth-child(even) {
        left: 0;
        padding-left: 44px;
      }
      .timeline-node {
        left: 5px;
        right: auto;
      }
      .timeline-item:nth-child(even) .timeline-node {
        left: 5px;
      }
      .inquiry-wrap {
        padding: 24px;
      }
      .inquiry-form-card {
        padding: 20px;
      }
    }