/* roulang page: index */
:root {
      --primary: #1E40AF;
      --primary-hover: #1D4ED8;
      --accent: #0284C7;
      --accent-light: #E0F2FE;
      --success: #10B981;
      --bg-base: #F8FAFC;
      --surface: #FFFFFF;
      --surface-dark: #0F172A;
      --surface-alt: #F1F5F9;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-sub: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.07);
      --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }

    /* 顶部服务信息条 */
    .top-bar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.8125rem;
      color: var(--text-sub);
      padding: 0.5rem 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .top-bar-tags {
      display: flex;
      gap: 1rem;
      align-items: center;
    }
    .status-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--success);
      border-radius: 50%;
      margin-right: 4px;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 0.5rem;
      letter-spacing: -0.02em;
    }
    .brand-logo span {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu {
      display: flex;
      gap: 1.75rem;
      align-items: center;
      list-style: none;
    }
    .nav-item a {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
    }
    .nav-item a:hover {
      color: var(--primary);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.65rem 1.35rem;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      gap: 0.5rem;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 10px rgba(30, 64, 175, 0.2);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 6px 14px rgba(30, 64, 175, 0.25);
    }
    .btn-outline {
      background-color: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      background-color: var(--surface-alt);
      border-color: var(--text-sub);
    }

    /* 移动端汉堡按钮 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      padding: 0.5rem;
      cursor: pointer;
    }
    .mobile-toggle svg {
      width: 24px;
      height: 24px;
      stroke: var(--text-main);
    }

    /* 板块通用规范 */
    .content-section {
      padding: 5rem 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--surface);
    }
    .section-header {
      margin-bottom: 3.5rem;
    }
    .section-badge {
      display: inline-block;
      padding: 0.25rem 0.75rem;
      background-color: var(--accent-light);
      color: var(--accent);
      font-size: 0.8125rem;
      font-weight: 700;
      border-radius: var(--radius-full);
      margin-bottom: 0.75rem;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 2.125rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      letter-spacing: -0.02em;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-sub);
      margin-top: 0.75rem;
      max-width: 680px;
    }

    /* 1. Hero 局部定制 (地图/本地感首屏，区域标签 + 附近入口) */
    .hero-wrapper {
      position: relative;
      background-color: #0F172A;
      color: #FFFFFF;
      overflow: hidden;
      padding: 4.5rem 0 5.5rem;
      border-bottom: 1px solid #1E293B;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      opacity: 0.22;
      object-fit: cover;
      width: 100%;
      height: 100%;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 2;
    }
    .hero-region-bar {
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(8px);
      padding: 0.35rem 0.85rem;
      border-radius: var(--radius-full);
      border: 1px solid rgba(255, 255, 255, 0.15);
      margin-bottom: 1.5rem;
      font-size: 0.875rem;
    }
    .hero-tag {
      background: var(--accent);
      color: #FFF;
      font-size: 0.75rem;
      padding: 0.15rem 0.5rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 1.25rem;
      letter-spacing: -0.03em;
    }
    .hero-desc {
      font-size: 1.125rem;
      color: #94A3B8;
      max-width: 720px;
      line-height: 1.7;
      margin-bottom: 2.25rem;
    }
    .hero-nodes {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 1.25rem;
      margin-top: 2.5rem;
    }
    .node-card {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 1.25rem;
      border-radius: var(--radius-md);
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }
    .node-card:hover {
      border-color: var(--accent);
      background: rgba(30, 41, 59, 0.95);
      transform: translateY(-2px);
    }
    .node-city {
      font-size: 1rem;
      font-weight: 700;
      color: #F8FAFC;
    }
    .node-status {
      font-size: 0.8125rem;
      color: var(--success);
      display: flex;
      align-items: center;
      gap: 0.25rem;
    }

    /* 2. 品牌故事/核算架构 */
    .brand-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .brand-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-xl);
      border: 1px solid var(--border-color);
    }
    .algo-spec-box {
      margin-top: 1.75rem;
      padding: 1.25rem;
      background-color: var(--surface-alt);
      border-left: 4px solid var(--primary);
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }
    .algo-spec-box h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.35rem;
    }

    /* 3. 系列导航 (多维资产扩展体系) */
    .series-nav-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.25rem;
    }
    .series-card {
      background: var(--surface);
      border: 1px solid var(--border-color);
      padding: 1.75rem 1.25rem;
      border-radius: var(--radius-md);
      text-align: center;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .series-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .series-icon {
      width: 48px;
      height: 48px;
      background: var(--accent-light);
      color: var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
      font-size: 1.25rem;
      font-weight: 700;
    }
    .series-card h3 {
      font-size: 1.125rem;
      margin-bottom: 0.5rem;
    }
    .series-card p {
      font-size: 0.875rem;
      color: var(--text-sub);
    }

    /* 4. 爆款网格 (核心计算优势区 3x2) */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .adv-card {
      background: var(--surface);
      padding: 2rem;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-xl);
      border-color: var(--accent);
    }
    .adv-number {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 0.75rem;
      font-family: monospace;
    }
    .adv-card h3 {
      font-size: 1.25rem;
      margin-bottom: 0.75rem;
      color: var(--text-main);
    }
    .adv-card p {
      font-size: 0.9375rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 5. 深色对比理念与资产全景流 */
    .dark-flow-section {
      background-color: var(--surface-dark);
      color: #FFFFFF;
      padding: 6rem 0;
    }
    .dark-flow-section .section-title {
      color: #FFFFFF;
    }
    .dark-flow-section .section-subtitle {
      color: #94A3B8;
    }
    .pipeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      margin-top: 3rem;
      position: relative;
    }
    .pipeline-step {
      background: rgba(30, 41, 59, 0.8);
      border: 1px solid #334155;
      padding: 1.75rem;
      border-radius: var(--radius-md);
      position: relative;
    }
    .pipeline-badge {
      font-size: 0.75rem;
      background: var(--primary);
      color: #FFF;
      padding: 0.2rem 0.5rem;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 0.75rem;
    }
    .pipeline-step h4 {
      font-size: 1.125rem;
      margin-bottom: 0.5rem;
      color: #F8FAFC;
    }
    .pipeline-step p {
      font-size: 0.875rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 6. 会员权益与版本配置方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .sol-card {
      background: var(--surface);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 2.25rem;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }
    .sol-card.featured {
      border-color: var(--primary);
      box-shadow: var(--shadow-xl);
    }
    .sol-card.featured::before {
      content: "推荐配置";
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: #FFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.25rem 0.75rem;
      border-radius: var(--radius-full);
    }
    .sol-card h3 {
      font-size: 1.35rem;
      margin-bottom: 0.5rem;
    }
    .sol-card .sol-target {
      font-size: 0.875rem;
      color: var(--text-sub);
      margin-bottom: 1.5rem;
      min-height: 40px;
    }
    .sol-features {
      list-style: none;
      margin-bottom: 2rem;
      flex-grow: 1;
    }
    .sol-features li {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .sol-features li::before {
      content: "✓";
      color: var(--success);
      font-weight: 800;
    }

    /* 7. 资讯与内嵌分析 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .insight-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .insight-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .insight-thumb {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .insight-body {
      padding: 1.5rem;
    }
    .insight-date {
      font-size: 0.8125rem;
      color: var(--text-sub);
      margin-bottom: 0.5rem;
    }
    .insight-body h3 {
      font-size: 1.15rem;
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }
    .insight-body p {
      font-size: 0.875rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 8. 保障条 (量化数据指标条) */
    .metrics-bar-section {
      background: linear-gradient(135deg, #1E40AF, #0284C7);
      color: #FFFFFF;
      padding: 3.5rem 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      text-align: center;
    }
    .metric-item .metric-val {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1;
      margin-bottom: 0.5rem;
      font-family: monospace;
    }
    .metric-item .metric-label {
      font-size: 0.9375rem;
      opacity: 0.9;
    }

    /* 9. 口碑与真实机构见证 */
    .stories-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .story-card {
      background: var(--surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      box-shadow: var(--shadow-sm);
    }
    .story-user {
      display: flex;
      align-items: center;
      gap: 0.875rem;
      margin-bottom: 1rem;
    }
    .story-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--accent-light);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .story-user h4 {
      font-size: 1rem;
      line-height: 1.2;
    }
    .story-user span {
      font-size: 0.8125rem;
      color: var(--text-sub);
    }
    .story-quote {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 10. 伙伴墙与生态体系 */
    .partners-section {
      padding: 3.5rem 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .partner-flex {
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
      gap: 2rem;
      opacity: 0.7;
    }
    .partner-logo-item {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    /* 11. FAQ 手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 1rem;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-item summary {
      padding: 1.25rem 1.5rem;
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      font-size: 1.35rem;
      color: var(--accent);
      transition: var(--transition);
    }
    .faq-item[open] summary::after {
      content: "−";
      transform: rotate(180deg);
    }
    .faq-content {
      padding: 0 1.5rem 1.25rem;
      font-size: 0.9375rem;
      color: var(--text-sub);
      line-height: 1.6;
      border-top: 1px solid var(--surface-alt);
      margin-top: -0.25rem;
      padding-top: 0.75rem;
    }

    /* 12. 进店/收口接入卡片 */
    .cta-card {
      background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
      border: 1px solid #BFDBFE;
      border-radius: var(--radius-lg);
      padding: 3.5rem 2rem;
      text-align: center;
      box-shadow: var(--shadow-md);
    }
    .cta-card h2 {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 0.85rem;
    }
    .cta-card p {
      font-size: 1.05rem;
      color: var(--text-sub);
      max-width: 600px;
      margin: 0 auto 2rem;
    }
    .cta-input-group {
      display: flex;
      max-width: 460px;
      margin: 0 auto;
      gap: 0.5rem;
    }
    .cta-input {
      flex: 1;
      padding: 0.75rem 1.25rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      font-size: 0.9375rem;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--primary);
    }

    /* 页脚规范 */
    .site-footer {
      background-color: var(--surface-dark);
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      font-size: 0.875rem;
      border-top: 1px solid #1E293B;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-brand h3 {
      font-size: 1.25rem;
      color: #FFFFFF;
      font-weight: 800;
      margin-bottom: 1rem;
    }
    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 1.25rem;
      max-width: 320px;
    }
    .footer-links h4 {
      font-size: 0.9375rem;
      color: #FFFFFF;
      margin-bottom: 1.25rem;
      font-weight: 700;
    }
    .footer-links ul {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 0.75rem;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 2rem;
      text-align: center;
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .grid-3x2, .solution-grid, .insights-grid, .stories-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .series-nav-grid, .pipeline-grid, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .brand-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .grid-3x2, .solution-grid, .insights-grid, .stories-grid, .series-nav-grid, .pipeline-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .cta-input-group {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }