/* roulang page: index */
:root {
      --primary: #0F2B48;
      --primary-dark: #07192C;
      --accent: #00A878;
      --accent-hover: #008f66;
      --warning: #E05D38;
      --bg-page: #F7F9FB;
      --bg-card: #FFFFFF;
      --bg-dark: #0B1520;
      --text-main: #121D24;
      --text-body: #3F4F5B;
      --text-muted: #7D8B96;
      --border-color: #E2E8F0;
      --border-dark: #1E293B;
      --radius: 8px;
      --shadow-sm: 0 1px 3px rgba(15, 43, 72, 0.06), 0 4px 12px rgba(15, 43, 72, 0.04);
      --shadow-lg: 0 12px 32px rgba(15, 43, 72, 0.12);
      --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

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

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

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .number-font {
      font-variant-numeric: tabular-nums;
      font-weight: 700;
    }

    /* 顶部服务条 */
    .top-utility-bar {
      background-color: var(--primary-dark);
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 8px 0;
    }
    .top-utility-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .utility-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 8px var(--accent);
    }

    /* 主导航条 */
    .main-nav-bar {
      background-color: #ffffff;
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-brand-badge {
      font-size: 0.7rem;
      font-weight: 600;
      background: rgba(0, 168, 120, 0.12);
      color: var(--accent);
      padding: 3px 8px;
      border-radius: 4px;
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 6px 2px;
      position: relative;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--accent);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: width 0.25s ease;
    }
    .nav-links a:hover::after, .nav-links a.active::after {
      width: 100%;
    }
    .nav-cta-btn {
      background-color: var(--accent);
      color: #ffffff !important;
      padding: 10px 20px !important;
      border-radius: 6px;
      font-weight: 600 !important;
      box-shadow: 0 4px 12px rgba(0, 168, 120, 0.24);
    }
    .nav-cta-btn:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }
    .nav-cta-btn::after {
      display: none !important;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--primary);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* Section 通用规范 */
    section {
      padding: 88px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 56px;
      text-align: left;
    }
    .section-header.text-center {
      text-align: center;
    }
    .section-subtitle {
      font-size: 0.875rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent);
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-body);
      max-width: 800px;
      line-height: 1.8;
    }
    .section-header.text-center .section-desc {
      margin-left: auto;
      margin-right: auto;
    }

    /* 1. 首屏视觉区（Hero Section - 裂变邀请/行动首屏） */
    .hero-section {
      background: linear-gradient(135deg, rgba(7, 25, 44, 0.95) 0%, rgba(15, 43, 72, 0.92) 100%),
                  url('/assets/images/8063329637431c3d.webp') center/cover no-repeat;
      color: #ffffff;
      padding: 100px 0 110px 0;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      background: rgba(0, 168, 120, 0.16);
      border: 1px solid rgba(0, 168, 120, 0.4);
      color: #34D399;
      padding: 6px 14px;
      border-radius: 4px;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: #FFFFFF;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-intro {
      font-size: 1.1rem;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 36px;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      border-radius: var(--radius);
      font-size: 1rem;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid transparent;
    }
    .btn:focus {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }
    .btn-primary {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 16px rgba(0, 168, 120, 0.32);
    }
    .btn-primary:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 168, 120, 0.4);
    }
    .btn-outline {
      background-color: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
    }
    .btn-outline:hover {
      background-color: rgba(255, 255, 255, 0.08);
      border-color: #FFFFFF;
    }

    /* 裂变专属卡片（蓝图硬性要求：奖励说明 + 进度条 + 邀请按钮） */
    .hero-fission-card {
      background: rgba(15, 43, 72, 0.65);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 12px;
      padding: 32px;
      box-shadow: var(--shadow-lg);
    }
    .fission-header {
      border-bottom: 1px solid rgba(255, 255, 255, 0.12);
      padding-bottom: 16px;
      margin-bottom: 20px;
    }
    .fission-badge {
      display: inline-block;
      font-size: 0.75rem;
      background: var(--warning);
      color: #FFF;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .fission-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFFFFF;
    }
    .fission-desc {
      font-size: 0.875rem;
      color: #94A3B8;
      margin-top: 6px;
    }
    .fission-progress-wrap {
      margin: 24px 0;
    }
    .progress-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.875rem;
      margin-bottom: 8px;
      color: #CBD5E1;
    }
    .progress-bar-bg {
      background: rgba(255, 255, 255, 0.1);
      border-radius: 999px;
      height: 10px;
      overflow: hidden;
    }
    .progress-bar-fill {
      width: 78%;
      background: linear-gradient(90deg, #00A878, #34D399);
      height: 100%;
      border-radius: 999px;
    }
    .fission-perks {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 24px;
    }
    .perk-item {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 10px 14px;
      border-radius: 6px;
    }
    .perk-num {
      font-size: 1.25rem;
      font-weight: 700;
      color: #34D399;
    }
    .perk-label {
      font-size: 0.75rem;
      color: #94A3B8;
    }
    .btn-invite {
      width: 100%;
      background: #FFFFFF;
      color: var(--primary);
      font-weight: 700;
      padding: 12px;
      border-radius: 6px;
      border: none;
      cursor: pointer;
      transition: 0.2s;
    }
    .btn-invite:hover {
      background: #E2E8F0;
    }

    /* 2. 核心效能数据看板条（Metrics Dashboard） */
    .metrics-section {
      background-color: #FFFFFF;
      padding: 56px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      border-left: 3px solid var(--accent);
      padding-left: 20px;
    }
    .metric-val {
      font-size: 2.35rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }
    .metric-unit {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--accent);
      margin-left: 4px;
    }
    .metric-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-top: 6px;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 3. 服务矩阵（Product Showcase） */
    .solutions-section {
      background-color: var(--bg-page);
    }
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .solution-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .solution-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .solution-img-wrap {
      height: 220px;
      overflow: hidden;
      position: relative;
    }
    .solution-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .solution-card:hover .solution-img-wrap img {
      transform: scale(1.05);
    }
    .solution-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 43, 72, 0.85);
      backdrop-filter: blur(6px);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .solution-content {
      padding: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .solution-desc {
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .solution-link {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .solution-link:hover {
      color: var(--accent-hover);
    }

    /* 4. 系统核心优势矩阵（Core Advantages） */
    .features-section {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-box {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.2s ease;
    }
    .feature-box:hover {
      background: #FFFFFF;
      border-color: var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .feature-header-icon {
      width: 44px;
      height: 44px;
      background: rgba(0, 168, 120, 0.12);
      color: var(--accent);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 18px;
    }
    .feature-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .feature-desc {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .feature-tag {
      display: inline-block;
      font-size: 0.75rem;
      color: var(--primary);
      background: #E2E8F0;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 5. 技术参数与标准规范（Technical Specifications） */
    .specs-section {
      background-color: var(--bg-page);
    }
    .specs-layout {
      display: grid;
      grid-template-columns: 1fr 1.3fr;
      gap: 40px;
      align-items: flex-start;
    }
    .specs-left-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
    }
    .specs-table-wrap {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
    }
    .specs-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
    }
    .specs-table th {
      background: #F1F5F9;
      color: var(--primary);
      text-align: left;
      padding: 14px 18px;
      font-weight: 700;
      border-bottom: 1px solid var(--border-color);
    }
    .specs-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-body);
    }
    .specs-table tr:last-child td {
      border-bottom: none;
    }
    .specs-table td:first-child {
      font-weight: 600;
      color: var(--text-main);
      width: 32%;
      background-color: #FAFAFA;
    }

    /* 6. 深色深度对比区（Vision AI VS 传统人工检测 - #comparison） */
    .comparison-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      padding: 96px 0;
    }
    .comparison-section .section-title {
      color: #FFFFFF;
    }
    .comparison-section .section-desc {
      color: #94A3B8;
    }
    .comp-table-container {
      margin-top: 48px;
      background: #111E2E;
      border-radius: var(--radius);
      border: 1px solid var(--border-dark);
      overflow: hidden;
    }
    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comp-table th {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      border-bottom: 1px solid var(--border-dark);
    }
    .comp-col-dim {
      width: 25%;
      color: #CBD5E1;
      background: #0E1A27;
    }
    .comp-col-trad {
      width: 35%;
      color: #E2E8F0;
      background: #132233;
    }
    .comp-col-ai {
      width: 40%;
      color: #34D399;
      background: #0D263B;
      border-left: 2px solid var(--accent);
    }
    .comp-table td {
      padding: 18px 24px;
      font-size: 0.925rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      line-height: 1.6;
    }
    .comp-table tr:last-child td {
      border-bottom: none;
    }
    .comp-badge-bad {
      display: inline-block;
      color: var(--warning);
      font-weight: 600;
      margin-right: 6px;
    }
    .comp-badge-good {
      display: inline-block;
      color: #34D399;
      font-weight: 600;
      margin-right: 6px;
    }

    /* 7. 真实落地案例（Case Studies） */
    .cases-section {
      background-color: #FFFFFF;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .case-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      background: #FFFFFF;
      box-shadow: var(--shadow-sm);
    }
    .case-img-box {
      height: 200px;
      position: relative;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-metric-float {
      position: absolute;
      bottom: 12px;
      right: 12px;
      background: rgba(15, 43, 72, 0.9);
      color: #34D399;
      padding: 6px 12px;
      border-radius: 4px;
      font-size: 0.85rem;
      font-weight: 700;
    }
    .case-content {
      padding: 24px;
    }
    .case-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .case-desc {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .case-meta {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-color);
      padding-top: 12px;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 8. 终端客户真实口碑评价（Testimonials） */
    .reviews-section {
      background-color: var(--bg-page);
      border-top: 1px solid var(--border-color);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .review-quote {
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 0.775rem;
      color: var(--text-muted);
    }

    /* 9. 技术演进与版本里程碑（Milestones & Pipeline） */
    .timeline-section {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
    }
    .timeline-track {
      position: relative;
      max-width: 900px;
      margin: 0 auto;
      padding: 20px 0;
    }
    .timeline-track::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: #CBD5E1;
      transform: translateX(-50%);
    }
    .timeline-item {
      position: relative;
      margin-bottom: 40px;
      width: 50%;
    }
    .timeline-item.left {
      left: 0;
      padding-right: 36px;
      text-align: right;
    }
    .timeline-item.right {
      left: 50%;
      padding-left: 36px;
      text-align: left;
    }
    .timeline-dot {
      position: absolute;
      top: 6px;
      width: 14px;
      height: 14px;
      background: var(--accent);
      border: 3px solid #FFFFFF;
      box-shadow: 0 0 0 2px var(--accent);
      border-radius: 50%;
      z-index: 2;
    }
    .timeline-item.left .timeline-dot {
      right: -7px;
    }
    .timeline-item.right .timeline-dot {
      left: -7px;
    }
    .timeline-card {
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px 24px;
      box-shadow: var(--shadow-sm);
    }
    .timeline-ver {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 4px;
    }
    .timeline-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .timeline-desc {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 10. 内嵌技术资讯与行业动态（Industry Insights） */
    .insights-section {
      background-color: var(--bg-page);
      border-top: 1px solid var(--border-color);
    }
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .insight-img-wrap {
      height: 180px;
      overflow: hidden;
    }
    .insight-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .insight-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-category {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .insight-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 12px;
    }
    .insight-text {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .insight-foot {
      font-size: 0.8rem;
      color: var(--text-muted);
      display: flex;
      justify-content: space-between;
      border-top: 1px solid #F1F5F9;
      padding-top: 12px;
    }

    /* 11. 常见技术答疑（Technical FAQ） */
    .faq-section {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
    }
    .faq-wrapper {
      max-width: 920px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      margin-bottom: 16px;
      background: #FFFFFF;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item.active {
      border-color: var(--accent);
    }
    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      user-select: none;
    }
    .faq-question:hover {
      background: #F8FAFC;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--accent);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 22px 24px;
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.75;
      border-top: 1px solid #F8FAFC;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 12. 转化与算力试用申请表单（Conversion CTA） */
    .contact-section {
      background: linear-gradient(135deg, #091E33 0%, #0F2B48 100%);
      color: #FFFFFF;
      padding: 96px 0;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 48px;
      align-items: center;
    }
    .contact-info-title {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
    }
    .contact-info-p {
      font-size: 1rem;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .contact-guarantee-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
      color: #E2E8F0;
    }
    .guarantee-check {
      width: 20px;
      height: 20px;
      background: var(--accent);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      color: #FFF;
      font-weight: bold;
    }
    .contact-form-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      padding: 36px;
      color: var(--text-main);
      box-shadow: var(--shadow-lg);
    }
    .contact-form-title {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .contact-form-sub {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      height: 44px;
      padding: 8px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.9rem;
      color: var(--text-main);
      background: #F8FAFC;
      transition: border-color 0.2s, background-color 0.2s;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--accent);
      background: #FFFFFF;
    }
    .checkbox-group {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-top: 6px;
    }
    .checkbox-label {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--text-body);
      cursor: pointer;
    }
    .btn-submit {
      width: 100%;
      height: 46px;
      background: var(--accent);
      color: #FFFFFF;
      border: none;
      border-radius: 6px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      margin-top: 10px;
      transition: background-color 0.2s, transform 0.2s;
    }
    .btn-submit:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }

    /* 权威页脚 */
    .site-footer {
      background-color: var(--bg-dark);
      color: #94A3B8;
      font-size: 0.875rem;
      padding-top: 72px;
      padding-bottom: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.9fr 0.9fr 1fr;
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: -0.2px;
    }
    .footer-brand-desc {
      line-height: 1.8;
      font-size: 0.85rem;
      margin-top: 14px;
      color: #94A3B8;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 0.85rem;
    }
    .footer-links a:hover {
      color: var(--accent);
      padding-left: 4px;
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.85rem;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8rem;
    }
    .footer-icp {
      color: #64748B;
    }
    .footer-icp:hover {
      color: #94A3B8;
    }

    /* 响应式样式适配 */
    @media (max-width: 1024px) {
      .hero-wrapper, .specs-layout, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .solutions-grid, .features-grid, .cases-grid, .reviews-grid, .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.65rem;
      }
      .nav-links {
        display: none;
      }
      .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 12px 24px rgba(0,0,0,0.1);
        gap: 16px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .metrics-grid, .solutions-grid, .features-grid, .cases-grid, .reviews-grid, .insights-grid {
        grid-template-columns: 1fr;
      }
      .timeline-track::before {
        left: 18px;
      }
      .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 48px !important;
        padding-right: 0 !important;
        text-align: left !important;
      }
      .timeline-item .timeline-dot {
        left: 11px !important;
      }
      .checkbox-group {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }