/* roulang page: index */
:root {
      --bg-dark: #0F1012;
      --bg-surface: #17191D;
      --bg-card: #1F2228;
      --accent-gold: #D8A26A;
      --accent-gold-hover: #E5B27D;
      --text-main: #F5F5F7;
      --text-sub: #C4C7CF;
      --text-muted: #6E737D;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(216, 162, 106, 0.4);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --mono-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    }

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

    body {
      background-color: var(--bg-dark);
      color: var(--text-sub);
      font-family: var(--font-family);
      font-size: 15px;
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    a:hover, a:focus {
      color: var(--accent-gold);
      text-decoration: none;
    }

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

    /* 顶部导航系统 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(15, 16, 18, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
    }
    .top-bar-container {
      max-width: 1320px;
      margin: 0 auto;
      height: 100%;
      padding: 0 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: 0.5px;
    }
    .brand-logo .coord-tag {
      font-family: var(--mono-family);
      font-size: 0.65rem;
      padding: 2px 6px;
      background: rgba(216, 162, 106, 0.15);
      color: var(--accent-gold);
      border-radius: 3px;
      border: 1px solid rgba(216, 162, 106, 0.3);
      font-weight: 500;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2.2rem;
      list-style: none;
      margin: 0;
    }
    .nav-menu li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-sub);
      position: relative;
      padding: 8px 0;
    }
    .nav-menu li a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: all 0.3s ease;
      transform: translateX(-50%);
    }
    .nav-menu li.active a,
    .nav-menu li a:hover {
      color: var(--text-main);
    }
    .nav-menu li.active a::after,
    .nav-menu li a:hover::after {
      width: 100%;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .status-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.75rem;
      font-family: var(--mono-family);
      color: #7EE787;
      background: rgba(126, 231, 135, 0.1);
      border: 1px solid rgba(126, 231, 135, 0.25);
      padding: 4px 10px;
      border-radius: 20px;
    }
    .status-dot {
      width: 6px;
      height: 6px;
      background: #7EE787;
      border-radius: 50%;
      box-shadow: 0 0 6px #7EE787;
    }
    .btn-header {
      background: var(--accent-gold);
      color: #0F1012;
      font-size: 0.85rem;
      font-weight: 600;
      padding: 8px 18px;
      border-radius: 4px;
      display: inline-block;
      transition: all 0.3s ease;
    }
    .btn-header:hover {
      background: var(--accent-gold-hover);
      color: #0F1012;
      box-shadow: 0 4px 16px rgba(216, 162, 106, 0.25);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-line);
      color: var(--text-main);
      padding: 6px 12px;
      border-radius: 4px;
      cursor: pointer;
    }

    /* 模块通用样式 */
    .section-wrap {
      padding: 5.5rem 1.5rem;
      border-bottom: 1px solid var(--border-line);
      position: relative;
    }
    .section-wrap.bg-surface {
      background-color: var(--bg-surface);
    }
    .section-inner {
      max-width: 1280px;
      margin: 0 auto;
    }
    .section-header {
      margin-bottom: 3.5rem;
    }
    .hud-meta {
      font-family: var(--mono-family);
      font-size: 0.75rem;
      color: var(--accent-gold);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      display: inline-block;
      margin-bottom: 0.75rem;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 1rem;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-sub);
      max-width: 780px;
      line-height: 1.75;
    }

    /* 1. Hero 板块 */
    .hero-section {
      position: relative;
      min-height: 86vh;
      display: flex;
      align-items: center;
      padding: 4rem 1.5rem;
      background: radial-gradient(circle at 85% 25%, rgba(216, 162, 106, 0.08) 0%, transparent 55%), var(--bg-dark);
      border-bottom: 1px solid var(--border-line);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 3.5rem;
      align-items: center;
      max-width: 1280px;
      margin: 0 auto;
      width: 100%;
    }
    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 1.5rem;
      letter-spacing: -1px;
    }
    .hero-intro {
      font-size: 1.08rem;
      line-height: 1.8;
      color: var(--text-sub);
      margin-bottom: 2rem;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 1.25rem;
      margin-bottom: 2.5rem;
    }
    .btn-primary {
      background: var(--accent-gold);
      color: #0F1012;
      font-weight: 600;
      padding: 14px 30px;
      border-radius: 4px;
      font-size: 0.95rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      background: var(--accent-gold-hover);
      color: #0F1012;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(216, 162, 106, 0.28);
    }
    .btn-outline {
      border: 1px solid var(--border-line);
      color: var(--text-main);
      font-weight: 500;
      padding: 13px 26px;
      border-radius: 4px;
      font-size: 0.95rem;
      background: rgba(255, 255, 255, 0.03);
    }
    .btn-outline:hover {
      border-color: var(--accent-gold);
      color: var(--accent-gold);
      background: rgba(216, 162, 106, 0.05);
    }
    .hero-hud-telemetry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid var(--border-line);
    }
    .hud-stat-item .stat-num {
      font-family: var(--mono-family);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--text-main);
      display: block;
    }
    .hud-stat-item .stat-lbl {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .hero-visual-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
    }
    .hero-visual-img {
      width: 100%;
      height: 480px;
      object-fit: cover;
      filter: brightness(0.88) contrast(1.05);
      transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .hero-visual-card:hover .hero-visual-img {
      transform: scale(1.03);
    }
    .hero-overlay-tag {
      position: absolute;
      top: 20px;
      left: 20px;
      background: rgba(15, 16, 18, 0.85);
      border: 1px solid rgba(216, 162, 106, 0.4);
      padding: 6px 14px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-family: var(--mono-family);
      color: var(--accent-gold);
      backdrop-filter: blur(8px);
    }
    .hero-overlay-foot {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      padding: 20px;
      background: linear-gradient(180deg, transparent 0%, rgba(15, 16, 18, 0.95) 100%);
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    /* 2. 核心分类服务矩阵（专门的分类入口板块） */
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .catalog-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 2.2rem 1.8rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
      transition: all 0.3s ease;
    }
    .catalog-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: transparent;
      transition: background 0.3s ease;
    }
    .catalog-card:hover {
      border-color: rgba(216, 162, 106, 0.3);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
    }
    .catalog-card:hover::before {
      background: var(--accent-gold);
    }
    .catalog-card .card-head {
      margin-bottom: 1.5rem;
    }
    .catalog-card .card-icon {
      font-size: 1.8rem;
      color: var(--accent-gold);
      margin-bottom: 1.2rem;
    }
    .catalog-card h3 {
      font-size: 1.22rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 0.8rem;
    }
    .catalog-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.65;
    }
    .catalog-card .link-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent-gold);
      margin-top: 1.5rem;
    }

    /* 3. 优势量化数据 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      padding: 3rem 2rem;
    }
    .metric-cell {
      text-align: center;
      position: relative;
    }
    .metric-cell:not(:last-child)::after {
      content: '';
      position: absolute;
      right: 0;
      top: 15%;
      height: 70%;
      width: 1px;
      background: var(--border-line);
    }
    .metric-val {
      font-family: var(--mono-family);
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1;
      margin-bottom: 0.6rem;
    }
    .metric-title {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 0.4rem;
    }
    .metric-note {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 4. 方案流程 */
    .roadmap-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }
    .roadmap-node {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 2rem 1.6rem;
      position: relative;
    }
    .node-step-tag {
      font-family: var(--mono-family);
      font-size: 0.75rem;
      color: var(--accent-gold);
      margin-bottom: 1rem;
      display: block;
    }
    .roadmap-node h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.8rem;
    }
    .roadmap-node p {
      font-size: 0.86rem;
      color: var(--text-sub);
      line-height: 1.65;
    }

    /* 5. 案例展示墙 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .showcase-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      overflow: hidden;
      transition: all 0.3s ease;
    }
    .showcase-item:hover {
      border-color: rgba(216, 162, 106, 0.35);
      transform: translateY(-4px);
    }
    .showcase-thumb-wrap {
      height: 220px;
      overflow: hidden;
      position: relative;
    }
    .showcase-thumb-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .showcase-item:hover .showcase-thumb-wrap img {
      transform: scale(1.05);
    }
    .showcase-body {
      padding: 1.6rem;
    }
    .showcase-body .tag-pill {
      font-size: 0.75rem;
      background: rgba(255, 255, 255, 0.05);
      color: var(--accent-gold);
      padding: 3px 8px;
      border-radius: 3px;
      display: inline-block;
      margin-bottom: 0.8rem;
    }
    .showcase-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.6rem;
    }
    .showcase-body p {
      font-size: 0.86rem;
      color: var(--text-sub);
      line-height: 1.65;
    }

    /* 6. 场景化应用专题 */
    .scenario-container {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      padding: 2.5rem;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .scenario-list {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .scenario-item {
      padding: 1.2rem;
      border-left: 2px solid var(--border-line);
      background: rgba(255, 255, 255, 0.01);
      transition: all 0.3s ease;
    }
    .scenario-item.active, .scenario-item:hover {
      border-left-color: var(--accent-gold);
      background: rgba(216, 162, 106, 0.04);
    }
    .scenario-item h4 {
      font-size: 1.05rem;
      color: var(--text-main);
      margin-bottom: 0.4rem;
      font-weight: 600;
    }
    .scenario-item p {
      font-size: 0.85rem;
      color: var(--text-sub);
      margin: 0;
    }
    .scenario-media-box {
      border-radius: 6px;
      overflow: hidden;
      border: 1px solid var(--border-line);
    }
    .scenario-media-box img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    /* 7. 质检与甄选标准 */
    .standards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .standard-box {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 2.2rem;
    }
    .standard-box .std-icon {
      font-size: 2rem;
      color: var(--accent-gold);
      margin-bottom: 1.2rem;
    }
    .standard-box h3 {
      font-size: 1.2rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 0.8rem;
    }
    .standard-box p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.65;
    }

    /* 8. 深度资讯与专题动态 */
    .news-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 2.5rem;
    }
    .news-featured {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .news-featured-img {
      height: 260px;
      overflow: hidden;
    }
    .news-featured-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .news-featured-content {
      padding: 2rem;
    }
    .news-featured-content h3 {
      font-size: 1.35rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 0.8rem;
    }
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }
    .news-card-mini {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 1.2rem 1.4rem;
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
      transition: all 0.3s ease;
    }
    .news-card-mini:hover {
      border-color: rgba(216, 162, 106, 0.35);
    }
    .news-meta {
      font-size: 0.75rem;
      color: var(--text-muted);
      font-family: var(--mono-family);
    }
    .news-card-mini h4 {
      font-size: 1.02rem;
      color: var(--text-main);
      font-weight: 600;
      margin: 0;
    }
    .news-card-mini p {
      font-size: 0.84rem;
      color: var(--text-sub);
      margin: 0;
    }

    /* 9. 内容库更新与索引看板 */
    .console-board {
      background: #0B0C0E;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: 6px;
      overflow: hidden;
      font-family: var(--mono-family);
    }
    .console-header {
      background: rgba(255, 255, 255, 0.03);
      padding: 12px 20px;
      border-bottom: 1px solid var(--border-line);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .console-table {
      width: 100%;
      border-collapse: collapse;
      margin: 0;
    }
    .console-table th {
      padding: 12px 20px;
      font-size: 0.78rem;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-line);
      text-align: left;
      font-weight: 500;
      background: transparent;
    }
    .console-table td {
      padding: 14px 20px;
      font-size: 0.84rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      color: var(--text-sub);
    }
    .console-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
      color: var(--text-main);
    }
    .tag-state-ok {
      color: #7EE787;
      background: rgba(126, 231, 135, 0.1);
      padding: 2px 8px;
      border-radius: 3px;
      font-size: 0.72rem;
    }

    /* 10. 合作伙伴与协同生态 */
    .partner-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 1.2rem;
    }
    .partner-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 1.8rem 1rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      gap: 0.6rem;
      transition: all 0.3s ease;
    }
    .partner-card:hover {
      border-color: rgba(216, 162, 106, 0.4);
      transform: translateY(-2px);
    }
    .partner-card i {
      font-size: 1.6rem;
      color: var(--text-muted);
      transition: color 0.3s ease;
    }
    .partner-card:hover i {
      color: var(--accent-gold);
    }
    .partner-card span {
      font-size: 0.82rem;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 11. FAQ 常见疑难索引 */
    .faq-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 1.8rem;
    }
    .faq-item h3 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.8rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .faq-item h3 i {
      color: var(--accent-gold);
      font-size: 0.9rem;
    }
    .faq-item p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.7;
      margin: 0;
    }

    /* 12. 保障与服务条款条带 */
    .assurance-stripe {
      background: #121316;
      border: 1px solid var(--border-line);
      border-radius: 8px;
      padding: 2.2rem 2.5rem;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
    }
    .assurance-col {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .assurance-col i {
      font-size: 1.5rem;
      color: var(--accent-gold);
      margin-top: 4px;
    }
    .assurance-col h4 {
      font-size: 0.98rem;
      color: var(--text-main);
      font-weight: 600;
      margin-bottom: 0.3rem;
    }
    .assurance-col p {
      font-size: 0.8rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin: 0;
    }

    /* 13. 终极联系与转化 CTA */
    .final-cta-panel {
      background: linear-gradient(135deg, rgba(23, 25, 29, 0.95) 0%, rgba(31, 34, 40, 0.98) 100%);
      border: 1px solid rgba(216, 162, 106, 0.25);
      border-radius: 8px;
      padding: 4rem 3rem;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .final-cta-panel h2 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 1.2rem;
    }
    .final-cta-panel p {
      font-size: 1.05rem;
      color: var(--text-sub);
      max-width: 680px;
      margin: 0 auto 2.5rem;
      line-height: 1.75;
    }
    .cta-form-row {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 580px;
      margin: 0 auto 1.5rem;
    }
    .cta-input {
      flex: 1;
      background: rgba(15, 16, 18, 0.85);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      padding: 14px 18px;
      font-size: 0.92rem;
      color: var(--text-main);
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--accent-gold);
    }
    .cta-form-btn {
      background: var(--accent-gold);
      color: #0F1012;
      border: none;
      padding: 0 28px;
      border-radius: 4px;
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      transition: background 0.3s ease;
    }
    .cta-form-btn:hover {
      background: var(--accent-gold-hover);
    }
    .cta-security-notes {
      font-size: 0.78rem;
      color: var(--text-muted);
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
    }

    /* 规范化页脚系统 */
    .site-footer {
      background: #0B0C0E;
      border-top: 1px solid var(--border-line);
      padding: 4.5rem 1.5rem 2rem;
    }
    .footer-inner {
      max-width: 1280px;
      margin: 0 auto;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 3rem;
      padding-bottom: 3.5rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 1rem;
    }
    .footer-brand p {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.7;
      max-width: 320px;
    }
    .footer-links-col h5 {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 1.2rem;
      letter-spacing: 0.5px;
    }
    .footer-links-col ul {
      list-style: none;
      margin: 0;
    }
    .footer-links-col ul li {
      margin-bottom: 0.7rem;
    }
    .footer-links-col ul li a {
      font-size: 0.85rem;
      color: var(--text-sub);
    }
    .footer-links-col ul li a:hover {
      color: var(--accent-gold);
    }
    .footer-bottom {
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: var(--text-muted);
      flex-wrap: wrap;
      gap: 1rem;
    }
    .footer-bottom a {
      color: var(--text-muted);
    }
    .footer-bottom a:hover {
      color: var(--accent-gold);
    }

    /* 移动端菜单抽屉 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(15, 16, 18, 0.98);
      backdrop-filter: blur(20px);
      z-index: 999;
      padding: 2.5rem 1.5rem;
      flex-direction: column;
      justify-content: space-between;
    }
    .mobile-drawer.is-open {
      display: flex;
    }
    .mobile-drawer ul {
      list-style: none;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    .mobile-drawer ul li a {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--text-main);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .catalog-grid,
      .metrics-bar,
      .roadmap-track,
      .assurance-stripe {
        grid-template-columns: repeat(2, 1fr);
      }
      .partner-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .news-wrapper,
      .scenario-container {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .nav-menu, .header-actions .status-chip {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .section-wrap {
        padding: 3.5rem 1rem;
      }
      .hero-content h1 {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.65rem;
      }
      .catalog-grid,
      .metrics-bar,
      .roadmap-track,
      .showcase-grid,
      .standards-grid,
      .faq-layout,
      .assurance-stripe {
        grid-template-columns: 1fr;
      }
      .cta-form-row {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }

/* roulang page: category1 */
:root {
      --bg-dark: #0F1012;
      --bg-surface: #17191D;
      --bg-card: #1F2228;
      --accent-gold: #D8A26A;
      --accent-gold-hover: #E5B27D;
      --text-main: #F5F5F7;
      --text-sub: #C4C7CF;
      --text-muted: #6E737D;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-focus: rgba(216, 162, 106, 0.4);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --mono-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    }
    * {
      box-sizing: border-box;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-sub);
      font-family: var(--font-family);
      font-size: 15px;
      line-height: 1.7;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    a:hover, a:focus {
      color: var(--accent-gold);
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 顶部导航系统 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(15, 16, 18, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
    }
    .top-bar-container {
      max-width: 1320px;
      margin: 0 auto;
      height: 100%;
      padding: 0 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: 0.5px;
    }
    .brand-logo .coord-tag {
      font-family: var(--mono-family);
      font-size: 0.65rem;
      padding: 2px 6px;
      background: rgba(216, 162, 106, 0.15);
      color: var(--accent-gold);
      border-radius: 3px;
      border: 1px solid rgba(216, 162, 106, 0.3);
      font-weight: 500;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2.2rem;
      list-style: none;
      margin: 0;
    }
    .nav-menu li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-sub);
      position: relative;
      padding: 8px 0;
    }
    .nav-menu li a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: all 0.3s ease;
      transform: translateX(-50%);
    }
    .nav-menu li.active a,
    .nav-menu li a:hover {
      color: var(--text-main);
    }
    .nav-menu li.active a::after,
    .nav-menu li a:hover::after {
      width: 100%;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .status-chip {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.75rem;
      font-family: var(--mono-family);
      color: #7EE787;
      background: rgba(126, 231, 135, 0.1);
      border: 1px solid rgba(126, 231, 135, 0.25);
      padding: 4px 10px;
      border-radius: 20px;
    }
    .status-chip .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #7EE787;
      box-shadow: 0 0 8px #7EE787;
    }
    .btn-header {
      background: var(--accent-gold);
      color: #0F1012;
      font-size: 0.85rem;
      font-weight: 600;
      padding: 8px 18px;
      border-radius: 4px;
      display: inline-block;
      transition: all 0.3s ease;
    }
    .btn-header:hover {
      background: var(--accent-gold-hover);
      color: #0F1012;
      box-shadow: 0 4px 16px rgba(216, 162, 106, 0.25);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-line);
      color: var(--text-main);
      padding: 6px 12px;
      border-radius: 4px;
      cursor: pointer;
    }

    /* 模块基础 */
    .section-wrap {
      padding: 5rem 1.5rem;
      border-bottom: 1px solid var(--border-line);
      position: relative;
    }
    .section-wrap.bg-surface {
      background-color: var(--bg-surface);
    }
    .section-inner {
      max-width: 1280px;
      margin: 0 auto;
    }
    .hud-meta {
      font-family: var(--mono-family);
      font-size: 0.75rem;
      color: var(--accent-gold);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      display: inline-block;
      margin-bottom: 0.75rem;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 0.85rem;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-sub);
      max-width: 800px;
      line-height: 1.75;
      margin-bottom: 0;
    }
    .section-header {
      margin-bottom: 3rem;
    }

    /* 按钮通用 */
    .btn-primary {
      background: var(--accent-gold);
      color: #0F1012;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 4px;
      font-size: 0.95rem;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary:hover {
      background: var(--accent-gold-hover);
      color: #0F1012;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(216, 162, 106, 0.28);
    }
    .btn-outline {
      border: 1px solid var(--border-line);
      color: var(--text-main);
      font-weight: 500;
      padding: 11px 24px;
      border-radius: 4px;
      font-size: 0.95rem;
      background: rgba(255, 255, 255, 0.03);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline:hover {
      border-color: var(--accent-gold);
      color: var(--accent-gold);
    }

    /* 1. 分类专属标头区（H1 视觉看板） */
    .cat-dashboard-header {
      padding: 3.5rem 1.5rem 3rem;
      background: radial-gradient(circle at 90% 15%, rgba(216, 162, 106, 0.07) 0%, transparent 60%), #121317;
      border-bottom: 1px solid var(--border-line);
    }
    .cat-dashboard-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.75fr;
      gap: 2.5rem;
      align-items: center;
      max-width: 1280px;
      margin: 0 auto;
    }
    .breadcrumb-nav {
      font-size: 0.85rem;
      font-family: var(--mono-family);
      color: var(--text-muted);
      margin-bottom: 1.2rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .breadcrumb-nav a {
      color: var(--text-sub);
    }
    .breadcrumb-nav a:hover {
      color: var(--accent-gold);
    }
    .breadcrumb-nav .sep {
      opacity: 0.4;
    }
    .cat-dashboard-info h1 {
      font-size: 2.35rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 1rem;
      letter-spacing: -0.5px;
    }
    .cat-stats-panel {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      padding: 1.75rem;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1.5rem;
      position: relative;
    }
    .cat-stats-panel::before {
      content: "[DIM-STAT // V4.8]";
      position: absolute;
      top: -10px;
      right: 16px;
      font-family: var(--mono-family);
      font-size: 0.65rem;
      background: var(--bg-dark);
      border: 1px solid rgba(216, 162, 106, 0.3);
      color: var(--accent-gold);
      padding: 1px 6px;
      border-radius: 2px;
    }
    .cat-stat-item .val {
      font-family: var(--mono-family);
      font-size: 1.85rem;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1.1;
      margin-bottom: 4px;
    }
    .cat-stat-item .lbl {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 2. 多维沙盒筛选与检索控制台 */
    .filter-console-wrap {
      padding: 1.5rem;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-line);
    }
    .filter-console {
      max-width: 1280px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }
    .filter-row {
      display: flex;
      align-items: center;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .filter-title {
      font-family: var(--mono-family);
      font-size: 0.8rem;
      color: var(--accent-gold);
      min-width: 90px;
    }
    .capsule-group {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    .capsule-btn {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-line);
      color: var(--text-sub);
      font-size: 0.85rem;
      padding: 6px 14px;
      border-radius: 20px;
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .capsule-btn:hover, .capsule-btn.active {
      background: rgba(216, 162, 106, 0.15);
      border-color: var(--accent-gold);
      color: var(--text-main);
    }
    .filter-bar-right {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px dashed var(--border-line);
      padding-top: 1rem;
      margin-top: 0.25rem;
    }
    .view-mode-group {
      display: flex;
      gap: 8px;
    }
    .view-btn {
      width: 34px;
      height: 34px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-line);
      border-radius: 4px;
      color: var(--text-muted);
      cursor: pointer;
      background: var(--bg-card);
    }
    .view-btn.active, .view-btn:hover {
      border-color: var(--accent-gold);
      color: var(--accent-gold);
    }
    .search-input-box {
      position: relative;
      width: 260px;
    }
    .search-input-box input {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      color: var(--text-main);
      font-size: 0.85rem;
      padding: 7px 32px 7px 12px;
      border-radius: 4px;
      width: 100%;
      height: 36px;
      margin: 0;
    }
    .search-input-box input:focus {
      border-color: var(--accent-gold);
      outline: none;
      box-shadow: 0 0 0 1px var(--accent-gold);
    }
    .search-input-box i {
      position: absolute;
      right: 12px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      font-size: 0.85rem;
    }

    /* 3. 分类主体内容卡片流 */
    .stream-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .stream-card {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
    }
    .stream-card:hover {
      border-color: rgba(216, 162, 106, 0.45);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    }
    .stream-thumb {
      position: relative;
      height: 190px;
      overflow: hidden;
      background: #090a0c;
    }
    .stream-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.45s ease;
    }
    .stream-card:hover .stream-thumb img {
      transform: scale(1.04);
    }
    .stream-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      font-size: 0.72rem;
      font-family: var(--mono-family);
      padding: 3px 8px;
      border-radius: 3px;
      background: rgba(15, 16, 18, 0.8);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--text-main);
    }
    .stream-badge.hot {
      color: var(--accent-gold);
      border-color: rgba(216, 162, 106, 0.4);
    }
    .stream-card-body {
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .stream-card-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      font-family: var(--mono-family);
      color: var(--text-muted);
      margin-bottom: 0.75rem;
    }
    .stream-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 0.75rem;
    }
    .stream-card-desc {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.65;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .stream-card-footer {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 0.85rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8rem;
    }
    .stream-tag {
      color: var(--accent-gold);
      font-family: var(--mono-family);
    }
    .stream-action {
      color: var(--text-sub);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-weight: 500;
    }
    .stream-card:hover .stream-action {
      color: var(--accent-gold);
    }
    .stream-pagination-wrap {
      margin-top: 3.5rem;
      text-align: center;
    }

    /* 4. 精选推荐子集（横向高权重专题） */
    .featured-strip-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .featured-strip-item {
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 6px;
      padding: 1.5rem;
      position: relative;
      border-top: 2px solid var(--accent-gold);
      transition: all 0.3s ease;
    }
    .featured-strip-item:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
    }
    .featured-level-tag {
      font-family: var(--mono-family);
      font-size: 0.7rem;
      color: var(--accent-gold);
      letter-spacing: 1px;
      margin-bottom: 0.6rem;
      display: block;
    }
    .featured-strip-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 0.75rem;
    }
    .featured-strip-desc {
      font-size: 0.85rem;
      color: var(--text-sub);
      line-height: 1.65;
      margin-bottom: 1rem;
    }
    .featured-metric-badge {
      display: inline-block;
      font-size: 0.75rem;
      font-family: var(--mono-family);
      padding: 3px 8px;
      background: rgba(216, 162, 106, 0.1);
      border: 1px solid rgba(216, 162, 106, 0.25);
      color: var(--accent-gold);
      border-radius: 3px;
    }

    /* 5. 横向指标对比矩阵 */
    .compare-table-wrap {
      overflow-x: auto;
      background: var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 8px;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 800px;
    }
    .compare-table th {
      background: #141518;
      color: var(--text-main);
      font-size: 0.9rem;
      font-weight: 600;
      padding: 1.2rem 1.5rem;
      border-bottom: 1px solid var(--border-line);
      letter-spacing: 0.5px;
    }
    .compare-table td {
      padding: 1.2rem 1.5rem;
      border-bottom: 1px solid var(--border-line);
      color: var(--text-sub);
      font-size: 0.9rem;
      vertical-align: middle;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .compare-table tr:hover td {
      background: rgba(255, 255, 255, 0.015);
    }
    .dim-name {
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .dim-tag {
      font-size: 0.7rem;
      font-family: var(--mono-family);
      color: var(--accent-gold);
      background: rgba(216, 162, 106, 0.12);
      padding: 2px 6px;
      border-radius: 3px;
    }

    /* 6. 品类检索常见问题（针对性 FAQ） */
    .cat-faq-accordion {
      max-width: 960px;
      margin: 0 auto;
      border: 1px solid var(--border-line);
      border-radius: 8px;
      background: var(--bg-card);
      overflow: hidden;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-line);
    }
    .faq-item:last-child {
      border-bottom: none;
    }
    .faq-header {
      padding: 1.35rem 1.75rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      transition: background-color 0.25s ease;
    }
    .faq-header:hover {
      background: rgba(255, 255, 255, 0.02);
      color: var(--accent-gold);
    }
    .faq-header i {
      font-size: 0.85rem;
      color: var(--accent-gold);
      transition: transform 0.3s ease;
    }
    .faq-body {
      padding: 0 1.75rem 1.5rem;
      font-size: 0.95rem;
      line-height: 1.75;
      color: var(--text-sub);
    }

    /* 7. 分类专栏转化与订阅锚点 */
    .cat-subscribe-card {
      background: radial-gradient(circle at 50% 50%, rgba(216, 162, 106, 0.08) 0%, transparent 70%), var(--bg-card);
      border: 1px solid var(--border-line);
      border-radius: 8px;
      padding: 3.5rem 2rem;
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
      position: relative;
    }
    .cat-subscribe-card::after {
      content: "[FEED-SYNC // 2026 ACTIVE]";
      position: absolute;
      top: 14px;
      right: 20px;
      font-family: var(--mono-family);
      font-size: 0.68rem;
      color: var(--accent-gold);
      border: 1px solid rgba(216, 162, 106, 0.3);
      padding: 2px 6px;
      border-radius: 2px;
    }
    .subscribe-form {
      display: flex;
      justify-content: center;
      gap: 12px;
      max-width: 540px;
      margin: 2rem auto 0;
    }
    .subscribe-form input {
      background: var(--bg-dark);
      border: 1px solid var(--border-line);
      border-radius: 4px;
      color: var(--text-main);
      padding: 12px 16px;
      font-size: 0.92rem;
      flex-grow: 1;
      height: 48px;
      margin: 0;
    }
    .subscribe-form input:focus {
      border-color: var(--accent-gold);
      outline: none;
    }
    .subscribe-form button {
      background: var(--accent-gold);
      color: #0F1012;
      font-weight: 600;
      border: none;
      padding: 0 24px;
      border-radius: 4px;
      cursor: pointer;
      font-size: 0.95rem;
      transition: background 0.3s ease;
      white-space: nowrap;
    }
    .subscribe-form button:hover {
      background: var(--accent-gold-hover);
    }

    /* 全局页脚系统 */
    .site-footer {
      background: #0B0C0E;
      border-top: 1px solid var(--border-line);
      padding: 5rem 1.5rem 2rem;
    }
    .footer-inner {
      max-width: 1280px;
      margin: 0 auto;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 1rem;
    }
    .footer-brand p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.75;
      max-width: 360px;
    }
    .footer-links-col h5 {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 1.25rem;
    }
    .footer-links-col ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links-col ul li {
      margin-bottom: 0.65rem;
    }
    .footer-links-col ul li a {
      font-size: 0.86rem;
      color: var(--text-muted);
    }
    .footer-links-col ul li a:hover {
      color: var(--accent-gold);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-line);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
      color: var(--text-muted);
      flex-wrap: wrap;
      gap: 1rem;
    }
    .footer-bottom a {
      color: var(--accent-gold);
    }

    /* 响应式断点控制 */
    @media screen and (max-width: 1024px) {
      .stream-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .featured-strip-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2.5rem;
      }
    }
    @media screen and (max-width: 768px) {
      .cat-dashboard-grid {
        grid-template-columns: 1fr;
      }
      .nav-menu {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .stream-grid {
        grid-template-columns: 1fr;
      }
      .featured-strip-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .subscribe-form {
        flex-direction: column;
      }
      .filter-bar-right {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
      }
      .search-input-box {
        width: 100%;
      }
    }