/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-dark: #059669;
      --accent: #F97316;
      --accent-hover: #EA580C;
      --dark: #0F172A;
      --dark-card: #1E293B;
      --light-bg: #F8FAFC;
      --white: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --border-dark: #334155;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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(--light-bg);
      color: var(--text-main);
      line-height: 1.65;
      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: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部服务公告 */
    .top-bar {
      background: #0B1120;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .top-badge span {
      background: var(--primary-dark);
      color: #FFF;
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 4px;
    }

    /* 悬浮双层控制面板导航 */
    .header-nav-wrapper {
      position: sticky;
      top: 12px;
      z-index: 1000;
      margin-bottom: -72px;
    }
    .nav-panel {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 20px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #FFF;
      font-weight: 800;
      font-size: 20px;
      letter-spacing: -0.5px;
    }
    .brand-logo .dot {
      width: 12px;
      height: 12px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 10px var(--primary);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
      list-style: none;
    }
    .nav-links a {
      color: #CBD5E1;
      font-size: 14px;
      font-weight: 500;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
    }
    .nav-links a:hover {
      color: #FFF;
      background: rgba(255, 255, 255, 0.08);
    }
    .btn-cta {
      background: var(--accent);
      color: #FFF;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
      border: none;
      cursor: pointer;
    }
    .btn-cta:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 14px rgba(249, 115, 22, 0.4);
    }

    /* 板块通用 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-header {
      margin-bottom: 50px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      color: var(--primary);
      background: rgba(16, 185, 129, 0.1);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid rgba(16, 185, 129, 0.2);
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块一：首屏 Hero */
    .hero-section {
      padding-top: 150px;
      padding-bottom: 100px;
      background: linear-gradient(180deg, #0B1120 0%, #0F172A 100%);
      color: #FFF;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }
    .hero-content h1 span {
      background: linear-gradient(90deg, #10B981, #34D399);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-content p {
      font-size: 16px;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .btn-primary-lg {
      background: var(--accent);
      color: #FFF;
      padding: 14px 30px;
      font-size: 16px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-primary-lg:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(249, 115, 22, 0.45);
    }
    .btn-outline-lg {
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #FFF;
      padding: 14px 28px;
      font-size: 16px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      background: rgba(255, 255, 255, 0.05);
    }
    .btn-outline-lg:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.4);
    }
    .hero-stats-pill {
      display: inline-flex;
      align-items: center;
      gap: 24px;
      padding: 16px 24px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
    }
    .hero-stat-item h4 {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .hero-stat-item span {
      font-size: 13px;
      color: #94A3B8;
    }
    .hero-visual-card {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.15);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
      background: var(--dark-card);
    }
    .hero-visual-card img {
      width: 100%;
      height: 480px;
      object-fit: cover;
    }
    .hero-floating-overlay {
      position: absolute;
      bottom: 20px;
      left: 20px;
      right: 20px;
      background: rgba(15, 23, 42, 0.88);
      backdrop-filter: blur(10px);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.1);
      display: flex;
      justify-content: space-around;
      text-align: center;
    }
    .hero-floating-overlay .item strong {
      display: block;
      color: #FFF;
      font-size: 18px;
    }
    .hero-floating-overlay .item small {
      color: #94A3B8;
      font-size: 12px;
    }

    /* 板块二：核心功能卖点三连 */
    .features-section {
      background: #FFF;
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-card {
      background: var(--light-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      transition: var(--transition);
      position: relative;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(16, 185, 129, 0.4);
    }
    .feature-icon-badge {
      width: 48px;
      height: 48px;
      background: rgba(16, 185, 129, 0.12);
      color: var(--primary-dark);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      margin-bottom: 20px;
    }
    .feature-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .feature-metric {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-dark);
    }

    /* 板块三：运动场景演示交互区 */
    .scenes-section {
      background: #F1F5F9;
    }
    .scenes-layout {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 40px;
      align-items: center;
    }
    .scene-item-box {
      background: #FFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 16px;
      transition: var(--transition);
    }
    .scene-item-box.active {
      border-left: 5px solid var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .scene-item-box h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .scene-item-box p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .scene-display-board {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-hover);
      background: #FFF;
    }
    .scene-display-board img {
      width: 100%;
      height: 440px;
      object-fit: cover;
    }
    .scene-display-info {
      padding: 20px 24px;
      background: #FFF;
    }
    .scene-display-info strong {
      font-size: 16px;
      color: var(--text-main);
      display: block;
      margin-bottom: 6px;
    }
    .scene-display-info span {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块四：硬件生态互联与数据标准 */
    .hardware-section {
      background: #FFF;
    }
    .hardware-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .hw-card {
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      background: var(--light-bg);
      text-align: center;
      transition: var(--transition);
    }
    .hw-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }
    .hw-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 8px;
      display: inline-block;
    }
    .hw-card h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .hw-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块五：综合功能矩阵 */
    .matrix-section {
      background: #F8FAFC;
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #FFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
    }
    .matrix-card:hover {
      box-shadow: var(--shadow-sm);
      border-color: #CBD5E1;
    }
    .matrix-badge-num {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 8px;
      background: rgba(16, 185, 129, 0.1);
      color: var(--primary-dark);
      border-radius: 4px;
      margin-bottom: 14px;
    }
    .matrix-card h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .matrix-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块六：运动健康旗舰版本对比 */
    .plans-section {
      background: #FFF;
    }
    .plans-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }
    .plan-card {
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      background: #FFF;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .plan-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 10px 30px rgba(16, 185, 129, 0.12);
      transform: scale(1.02);
    }
    .featured-label {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #FFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 14px;
      border-radius: 12px;
    }
    .plan-card h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .plan-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 42px;
    }
    .plan-list {
      list-style: none;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .plan-list li {
      font-size: 14px;
      color: var(--text-main);
      padding: 8px 0;
      border-bottom: 1px dashed var(--border);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .plan-list li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }

    /* 板块七：深色沉浸式生理算法与临床理念 */
    .technology-section {
      background: #0B1120;
      color: #FFF;
      padding: 100px 0;
    }
    .technology-section .section-title {
      color: #FFF;
    }
    .technology-section .section-subtitle {
      color: #94A3B8;
    }
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .tech-info-box {
      background: var(--dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 20px;
    }
    .tech-info-box h4 {
      font-size: 18px;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .tech-info-box p {
      font-size: 14px;
      color: #CBD5E1;
      line-height: 1.7;
    }
    .tech-image-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-dark);
    }
    .tech-image-wrap img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }

    /* 板块八：真实用户蜕变故事与数据跟踪 */
    .stories-section {
      background: #F8FAFC;
    }
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: #FFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .story-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .story-body {
      padding: 28px;
    }
    .story-body h4 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .story-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .story-metrics-row {
      display: flex;
      gap: 16px;
      border-top: 1px solid var(--border);
      padding-top: 16px;
    }
    .story-stat-item strong {
      display: block;
      color: var(--primary-dark);
      font-size: 18px;
    }
    .story-stat-item span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块九：综合指标数据统计条 */
    .metrics-section {
      background: #111827;
      color: #FFF;
      padding: 60px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-data-card h2 {
      font-size: 40px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 6px;
      font-variant-numeric: tabular-nums;
    }
    .metric-data-card p {
      font-size: 14px;
      color: #94A3B8;
    }

    /* 板块十：多维度用户口碑与专业教练评价 */
    .reviews-section {
      background: #FFF;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: var(--light-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .avatar-placeholder {
      width: 44px;
      height: 44px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-muted);
    }
    .author-info h5 {
      font-size: 15px;
      font-weight: 700;
    }
    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块十一：科学训练指南与资讯摘要 */
    .insights-section {
      background: #F8FAFC;
    }
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: #FFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }
    .insight-card:hover {
      box-shadow: var(--shadow-sm);
    }
    .insight-card img {
      width: 100%;
      height: 190px;
      object-fit: cover;
    }
    .insight-body {
      padding: 24px;
    }
    .insight-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
      display: inline-block;
    }
    .insight-body h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-body p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块十二：运动健康常见问题 FAQ */
    .faq-section {
      background: #FFF;
    }
    .faq-wrap {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      background: var(--light-bg);
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--primary-dark);
    }
    .faq-item.open .faq-question::after {
      content: "-";
    }
    .faq-answer {
      padding: 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
      background: #FFF;
      border-top: 1px solid var(--border);
    }
    .faq-item.open .faq-answer {
      display: block;
    }

    /* 板块十三：全面服务保障条 */
    .guarantee-section {
      background: #F1F5F9;
      padding: 60px 0;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-box {
      background: #FFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      text-align: center;
    }
    .guarantee-box strong {
      font-size: 16px;
      color: var(--text-main);
      display: block;
      margin-bottom: 6px;
    }
    .guarantee-box p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 底部悬浮条 Sticky CTA */
    .sticky-bar {
      position: fixed;
      bottom: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 40px);
      max-width: 980px;
      background: rgba(15, 23, 42, 0.92);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 40px;
      padding: 12px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      z-index: 999;
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.3);
      transition: var(--transition);
    }
    .sticky-info {
      display: flex;
      align-items: center;
      gap: 12px;
      color: #FFF;
      font-size: 14px;
    }
    .sticky-status-dot {
      width: 10px;
      height: 10px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }

    /* 全局页脚 */
    footer {
      background: #0B1120;
      color: #94A3B8;
      padding-top: 80px;
      padding-bottom: 90px;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col h4 {
      color: #FFF;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 12px;
    }
    .footer-links a:hover {
      color: #FFF;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .scenes-layout, .tech-grid {
        grid-template-columns: 1fr;
      }
      .features-grid, .matrix-grid, .plans-grid, .reviews-grid, .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hardware-grid, .guarantee-grid, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .features-grid, .matrix-grid, .plans-grid, .reviews-grid, .insights-grid, .hardware-grid, .guarantee-grid, .metrics-grid, .stories-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .sticky-bar {
        display: none;
      }
    }