/* roulang page: index */
:root {
      --bg-main: #F8F9FA;
      --bg-card: #FFFFFF;
      --bg-dark: #0B0F19;
      --primary: #0F172A;
      --accent: #0D9488;
      --accent-blue: #2563EB;
      --text-title: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius: 4px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
      --transition: all 0.2s 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", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-body);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部政务规范双行顶栏 */
    .top-bar {
      background-color: #F1F5F9;
      height: 36px;
      font-size: 12px;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: center;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .top-bar-links a {
      margin-left: 16px;
      color: var(--text-muted);
    }
    .top-bar-links a:hover {
      color: var(--accent);
    }

    header.main-header {
      background-color: #FFFFFF;
      height: 70px;
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
      display: flex;
      align-items: center;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 19px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--primary);
    }
    .brand-icon {
      width: 28px;
      height: 28px;
      background: var(--primary);
      border-radius: 2px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .brand-icon svg {
      width: 18px;
      height: 18px;
      fill: none;
      stroke: var(--accent);
      stroke-width: 2.5;
    }

    nav.main-nav ul {
      display: flex;
      list-style: none;
      gap: 28px;
    }
    nav.main-nav a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 8px 0;
    }
    nav.main-nav a:hover {
      color: var(--accent);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
    }
    .btn-primary:hover {
      background-color: #1E293B;
      box-shadow: var(--shadow-hover);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
      border-color: var(--accent);
    }
    .btn-accent:hover {
      background-color: #0F766E;
    }
    .btn-outline {
      background-color: transparent;
      color: var(--primary);
      border-color: var(--border-color);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      background-color: #FFFFFF;
    }

    /* 板块通用标准 */
    section {
      padding: 72px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 40px;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--accent);
      margin-bottom: 8px;
      background: rgba(13, 148, 136, 0.08);
      padding: 2px 8px;
      border-radius: 2px;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-title);
      letter-spacing: -0.02em;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.7;
    }

    /* 板块 1: Hero */
    .hero-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      padding: 60px 0;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .hero-badge-group {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }
    .hero-badge {
      background: #EFF6FF;
      color: var(--accent-blue);
      border: 1px solid #BFDBFE;
      font-size: 12px;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 2px;
    }
    .hero-time-ring {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--accent);
      font-weight: 600;
    }
    .hero-title {
      font-size: 38px;
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -0.03em;
      color: var(--text-title);
      margin-bottom: 20px;
    }
    .hero-lead {
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-body);
      margin-bottom: 28px;
    }
    .hero-actions {
      display: flex;
      gap: 14px;
      margin-bottom: 32px;
    }
    .hero-metrics-pill {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }
    .metric-pill-num {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
    }
    .metric-pill-label {
      font-size: 12px;
      color: var(--text-muted);
    }
    .hero-media-card {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 12px;
      position: relative;
    }
    .hero-media-card img {
      border-radius: 2px;
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .media-card-status {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(4px);
      color: #FFFFFF;
      padding: 12px 16px;
      border-radius: 2px;
      font-size: 13px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* 板块 2: 问题陈述与行业瓶颈 */
    .problem-section {
      background: var(--bg-main);
      border-bottom: 1px solid var(--border-color);
    }
    .problem-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .problem-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }
    .problem-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: #EF4444;
    }
    .problem-card h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-title);
    }
    .problem-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 板块 3: 系统架构与技术规范 */
    .arch-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .arch-specs {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .spec-item {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      padding: 14px;
      border-radius: 2px;
    }
    .spec-item strong {
      display: block;
      font-size: 13px;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .spec-item span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 4: 核心性能与优势矩阵 */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-matrix {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: var(--transition);
    }
    .card-matrix:hover {
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .card-matrix .card-tag {
      font-size: 11px;
      color: var(--accent);
      background: rgba(13, 148, 136, 0.08);
      display: inline-block;
      padding: 2px 6px;
      border-radius: 2px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .card-matrix h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 8px;
    }
    .card-matrix p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 5: 硬件终端矩阵 */
    .hardware-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .hardware-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .hw-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      background: #FFFFFF;
      overflow: hidden;
    }
    .hw-thumb {
      height: 190px;
      background: #F1F5F9;
      overflow: hidden;
    }
    .hw-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .hw-card:hover .hw-thumb img {
      transform: scale(1.02);
    }
    .hw-body {
      padding: 20px;
    }
    .hw-body h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-title);
    }
    .hw-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 14px;
      line-height: 1.5;
    }
    .hw-table {
      width: 100%;
      font-size: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 10px;
    }
    .hw-table-row {
      display: flex;
      justify-content: space-between;
      padding: 3px 0;
      color: var(--text-body);
    }
    .hw-table-row span:last-child {
      font-weight: 600;
      color: var(--primary);
    }

    /* 板块 6: 方案流程流水线 */
    .pipeline-section {
      background: var(--bg-main);
      border-bottom: 1px solid var(--border-color);
    }
    .pipeline-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .pipe-step {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      position: relative;
    }
    .pipe-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 10px;
    }
    .pipe-step h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-title);
    }
    .pipe-step p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 7: 沉浸式深色区域 (Dark Immersion) */
    .dark-section {
      background: var(--bg-dark);
      color: #FFFFFF;
      border-bottom: 1px solid #1E293B;
    }
    .dark-section .section-title {
      color: #FFFFFF;
    }
    .dark-section .section-desc {
      color: #94A3B8;
    }
    .dark-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .dark-card {
      background: #111827;
      border: 1px solid #1F2937;
      border-radius: var(--radius);
      padding: 24px;
    }
    .dark-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 8px;
    }
    .dark-card p {
      font-size: 13px;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 板块 8: 场景实测与应用分析 */
    .field-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .field-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .field-report-card {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      margin-bottom: 14px;
    }
    .field-report-card h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-title);
    }
    .field-report-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 9: 关键效能统计条 */
    .metrics-bar-section {
      background: var(--primary);
      padding: 44px 0;
      color: #FFFFFF;
    }
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-value {
      font-size: 36px;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #38BDF8;
      margin-bottom: 4px;
    }
    .metric-text {
      font-size: 13px;
      color: #CBD5E1;
      font-weight: 500;
    }

    /* 板块 10: 专家及教练技术评测 */
    .feedback-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .feedback-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .fb-card {
      background: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
    }
    .fb-quote {
      font-size: 13px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 16px;
      font-style: italic;
    }
    .fb-author {
      font-size: 12px;
      color: var(--text-muted);
      border-top: 1px solid var(--border-color);
      padding-top: 10px;
    }
    .fb-author strong {
      color: var(--primary);
      display: block;
      font-size: 13px;
    }

    /* 板块 11: 动态与学术进展摘要 */
    .dynamics-section {
      background: var(--bg-main);
      border-bottom: 1px solid var(--border-color);
    }
    .news-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 28px;
    }
    .news-featured {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
    }
    .news-featured img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      border-radius: 2px;
      margin-bottom: 14px;
    }
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .news-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 16px;
    }
    .news-item-date {
      font-size: 11px;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 4px;
    }
    .news-item-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 4px;
    }
    .news-item-snippet {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块 12: 适配协议与标准认证 */
    .partner-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 16px;
    }
    .partner-item {
      border: 1px solid var(--border-color);
      padding: 18px 12px;
      text-align: center;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      background: var(--bg-main);
      border-radius: 2px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    /* 板块 13: 常见技术 FAQ */
    .faq-section {
      background: var(--bg-main);
      border-bottom: 1px solid var(--border-color);
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 900px;
      margin: 0 auto;
    }
    details.faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
    }
    details.faq-item summary {
      padding: 18px 20px;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-title);
      cursor: pointer;
      user-select: none;
      outline: none;
    }
    details.faq-item summary:hover {
      background: #F8FAFC;
    }
    details.faq-item p {
      padding: 0 20px 18px 20px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      border-top: 1px solid #F1F5F9;
      margin-top: 4px;
      padding-top: 12px;
    }

    /* 板块 14: 服务保障与数据合规 */
    .assurance-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
      padding: 40px 0;
    }
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .assure-col {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      border-right: 1px solid var(--border-color);
      padding-right: 16px;
    }
    .assure-col:last-child {
      border-right: none;
    }
    .assure-icon {
      width: 24px;
      height: 24px;
      fill: none;
      stroke: var(--accent);
      stroke-width: 2;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .assure-col strong {
      display: block;
      font-size: 14px;
      color: var(--text-title);
      margin-bottom: 2px;
    }
    .assure-col span {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 板块 15: 快速部署对接与咨询入口 */
    .consult-section {
      background: var(--bg-dark);
      color: #FFFFFF;
      padding: 64px 0;
    }
    .consult-box {
      background: #111827;
      border: 1px solid #1F2937;
      border-radius: var(--radius);
      padding: 36px;
      max-width: 900px;
      margin: 0 auto;
    }
    .consult-header {
      margin-bottom: 24px;
      text-align: center;
    }
    .consult-header h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .consult-header p {
      font-size: 14px;
      color: #94A3B8;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group label {
      font-size: 13px;
      color: #CBD5E1;
      font-weight: 500;
    }
    .form-control {
      background: #1E293B;
      border: 1px solid #334155;
      padding: 10px 14px;
      border-radius: var(--radius);
      color: #FFFFFF;
      font-size: 14px;
      outline: none;
    }
    .form-control:focus {
      border-color: var(--accent);
    }

    /* 页脚 */
    footer.main-footer {
      background: #0B0F19;
      color: #94A3B8;
      border-top: 1px solid #1E293B;
      padding: 60px 0 24px 0;
      font-size: 13px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand {
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      display: inline-block;
    }
    .footer-desc {
      line-height: 1.7;
      font-size: 13px;
      color: #64748B;
    }
    .footer-title {
      font-size: 14px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
    }
    .footer-icp {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .arch-grid, .field-layout, .news-grid {
        grid-template-columns: 1fr;
      }
      .grid-3x2, .hardware-grid, .dark-grid, .feedback-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      header.main-header {
        height: auto;
        padding: 14px 0;
      }
      .header-inner {
        flex-direction: column;
        gap: 12px;
      }
      nav.main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-metrics-pill {
        grid-template-columns: 1fr;
      }
      .problem-grid, .grid-3x2, .hardware-grid, .pipeline-flow, .dark-grid, .feedback-grid, .partner-grid, .assurance-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
      }
      .assure-col {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 12px;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }