/* roulang page: index */
:root {
      --primary: #1E56A0;
      --primary-dark: #143e75;
      --accent: #00A896;
      --accent-warm: #FF6B35;
      --bg-main: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0B192C;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 6px -1px rgba(0,0,0,0.05);
      --shadow-card: 0 10px 25px -5px rgba(30, 86, 160, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 20px 30px -10px rgba(30, 86, 160, 0.16);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --max-width: 1240px;
    }

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

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

    body {
      font-family: system-ui, -apple-system, "SF Pro SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-main);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }

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

    ul, ol {
      list-style: none;
    }

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

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

    /* 顶部信息栏 */
    .top-bar {
      background-color: #0F172A;
      color: #94A3B8;
      font-size: 0.8125rem;
      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;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-bar-left span {
      margin-right: 20px;
    }
    .top-bar-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* 导航栏 */
    .site-header {
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 2px 12px rgba(15, 23, 42, 0.05);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      font-size: 1.2rem;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-action .btn-nav {
      background-color: var(--primary);
      color: #fff;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(30, 86, 160, 0.25);
    }
    .nav-action .btn-nav:hover {
      background-color: var(--primary-dark);
      transform: translateY(-1px);
    }

    /* Section 通用规范 */
    .section {
      padding: 90px 0;
      position: relative;
    }
    .section-light {
      background-color: var(--bg-white);
    }
    .section-gray {
      background-color: var(--bg-main);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #fff;
    }
    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 56px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      background-color: rgba(30, 86, 160, 0.08);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-dark .section-tag {
      background-color: rgba(0, 168, 150, 0.2);
      color: var(--accent);
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .section-dark .section-title {
      color: #fff;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-dark .section-desc {
      color: var(--text-light);
    }

    /* 板块 1: Hero 旗舰展厅 */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, rgba(11, 25, 44, 0.88), rgba(30, 86, 160, 0.82)),
                  url('/assets/images/智慧场馆_智慧体育场馆优势和案例分享建筑管理科技全民健身赛事_新浪新闻.jpg') center/cover no-repeat;
      color: #fff;
      padding: 100px 0 130px;
      overflow: hidden;
    }
    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(8px);
      padding: 6px 18px;
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 500;
      border: 1px solid rgba(255, 255, 255, 0.2);
      margin-bottom: 24px;
    }
    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent);
    }
    .hero-title {
      font-size: 3.1rem;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 24px;
      color: #fff;
    }
    .hero-p {
      font-size: 1.15rem;
      color: rgba(255, 255, 255, 0.9);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .btn-hero-primary {
      background-color: var(--accent-warm);
      color: #fff;
      padding: 14px 34px;
      border-radius: var(--radius-full);
      font-size: 1.05rem;
      font-weight: 600;
      box-shadow: 0 10px 20px rgba(255, 107, 53, 0.35);
    }
    .btn-hero-primary:hover {
      background-color: #f05a22;
      transform: translateY(-2px);
    }
    .btn-hero-outline {
      background-color: rgba(255, 255, 255, 0.1);
      color: #fff;
      padding: 14px 30px;
      border-radius: var(--radius-full);
      font-size: 1.05rem;
      font-weight: 600;
      border: 1px solid rgba(255, 255, 255, 0.4);
      backdrop-filter: blur(6px);
    }
    .btn-hero-outline:hover {
      background-color: rgba(255, 255, 255, 0.2);
    }

    /* 旗舰店系列导航条（叠放于 Hero 下缘） */
    .hero-subnav-panel {
      max-width: 1040px;
      margin: 0 auto;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 16px 28px;
      box-shadow: 0 20px 40px rgba(11, 25, 44, 0.12);
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
      margin-top: -50px;
      z-index: 10;
      border: 1px solid var(--border-color);
    }
    .subnav-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 10px 14px;
      border-radius: var(--radius-md);
      transition: background 0.2s;
    }
    .subnav-item:hover {
      background-color: var(--bg-main);
    }
    .subnav-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(30, 86, 160, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      flex-shrink: 0;
    }
    .subnav-text h4 {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 2px;
    }
    .subnav-text p {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* 板块 2: 传统痛点反差 (#pain-points) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
      position: relative;
      overflow: hidden;
    }
    .pain-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background-color: #EF4444;
    }
    .pain-card:hover {
      box-shadow: var(--shadow-card);
      transform: translateY(-4px);
    }
    .pain-tag {
      font-size: 0.8rem;
      font-weight: 700;
      color: #EF4444;
      margin-bottom: 12px;
      display: inline-block;
    }
    .pain-card h3 {
      font-size: 1.25rem;
      margin-bottom: 14px;
      color: var(--text-main);
    }
    .pain-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    /* 板块 3: 体系与硬核参数 (#about) */
    .about-dual-wrap {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 48px;
      align-items: center;
    }
    .about-media-box {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .about-media-box img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .metric-badge-floating {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255,255,255,0.8);
      box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    }
    .metric-badge-floating strong {
      display: block;
      color: var(--primary);
      font-size: 1.1rem;
      margin-bottom: 4px;
    }
    .metric-badge-floating span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .about-info-text h3 {
      font-size: 1.85rem;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 20px;
      color: var(--text-main);
    }
    .about-info-text p {
      color: var(--text-muted);
      font-size: 1rem;
      margin-bottom: 24px;
      line-height: 1.8;
    }
    .about-feature-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }
    .about-f-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 600;
      color: var(--text-main);
      font-size: 0.95rem;
    }
    .dot-check {
      width: 20px;
      height: 20px;
      background-color: rgba(0, 168, 150, 0.15);
      color: var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
    }

    /* 板块 4: 六大优势矩阵 (#advantage) */
    .grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .matrix-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 32px 26px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .matrix-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-5px);
      border-color: rgba(30, 86, 160, 0.2);
    }
    .matrix-card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(30, 86, 160, 0.1), rgba(0, 168, 150, 0.15));
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .matrix-card h3 {
      font-size: 1.2rem;
      margin-bottom: 6px;
    }
    .matrix-card-sub {
      font-size: 0.8rem;
      color: var(--text-light);
      text-transform: uppercase;
      margin-bottom: 12px;
      font-weight: 600;
      letter-spacing: 0.5px;
    }
    .matrix-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 5: 热门专项卡片 (#courses) */
    .course-card {
      background: #fff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .course-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .course-thumb {
      height: 200px;
      position: relative;
      overflow: hidden;
    }
    .course-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .course-card:hover .course-thumb img {
      transform: scale(1.05);
    }
    .course-level {
      position: absolute;
      top: 14px;
      right: 14px;
      background: rgba(15, 23, 42, 0.75);
      backdrop-filter: blur(4px);
      color: #fff;
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      font-weight: 500;
    }
    .course-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .course-badge {
      display: inline-block;
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .course-body h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .course-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .course-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }
    .course-stats {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .btn-card {
      background-color: var(--primary);
      color: #fff;
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 600;
    }
    .btn-card:hover {
      background-color: var(--primary-dark);
    }

    /* 板块 6: 深色科学教学逻辑 (#logic) */
    .logic-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .logic-left h2 {
      font-size: 2.3rem;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 24px;
      color: #fff;
    }
    .logic-left p {
      font-size: 1.05rem;
      color: var(--text-light);
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .logic-indicators {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .logic-stat-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      backdrop-filter: blur(8px);
    }
    .logic-stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 4px;
    }
    .logic-stat-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 6px;
    }
    .logic-stat-desc {
      font-size: 0.8rem;
      color: var(--text-light);
      line-height: 1.5;
    }

    /* 板块 7: 训练流程步骤 (#steps) */
    .steps-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .step-item h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
    }
    .step-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 8: 公信力数据条 (#metrics) */
    .metrics-bar-section {
      background: linear-gradient(135deg, #1E56A0, #143e75);
      color: #fff;
      padding: 60px 0;
    }
    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-single-num {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }
    .metric-single-num span {
      font-size: 1.6rem;
      font-weight: 600;
      color: var(--accent);
    }
    .metric-single-label {
      font-size: 1.05rem;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .metric-single-desc {
      font-size: 0.82rem;
      color: rgba(255, 255, 255, 0.7);
    }

    /* 板块 9: 目标人群画像 (#audience) */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .audience-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 28px 22px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .audience-role {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .audience-card h3 {
      font-size: 1.2rem;
      margin-bottom: 12px;
    }
    .audience-card p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 10: 提分成果故事 (#stories) */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: #fff;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .story-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-color);
    }
    .story-user {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .story-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .story-name h4 {
      font-size: 1.05rem;
      color: var(--text-main);
    }
    .story-name span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .story-tag {
      background: rgba(0, 168, 150, 0.1);
      color: var(--accent);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 0.8rem;
      font-weight: 600;
    }
    .story-contrast {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      background: var(--bg-main);
      padding: 16px;
      border-radius: var(--radius-md);
      margin-bottom: 20px;
    }
    .contrast-box h5 {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 4px;
    }
    .contrast-box strong {
      font-size: 1.3rem;
      color: var(--primary);
    }
    .story-quote {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.75;
      font-style: italic;
    }

    /* 板块 11: 学员家长评价 (#testimonials) */
    .testimonial-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 30px 26px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .rating-stars {
      color: #F59E0B;
      font-size: 1.1rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .testimonial-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testimonial-author {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: var(--text-light);
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }
    .testimonial-author strong {
      color: var(--text-main);
    }

    /* 板块 12: 训练资讯专区 (#news) */
    .news-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s;
    }
    .news-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .news-img {
      height: 190px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-img img {
      transform: scale(1.05);
    }
    .news-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .news-content h3 {
      font-size: 1.15rem;
      margin-bottom: 12px;
      color: var(--text-main);
      line-height: 1.4;
    }
    .news-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .news-link {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块 13: 常见答疑手风琴 (#faq) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #fff;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background-color: var(--bg-main);
    }
    .faq-toggle-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.3s;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s ease;
      background: #fff;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.75;
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 12px 24px 22px;
      border-top: 1px solid var(--border-color);
    }

    /* 板块 14: 底部收口行动区 (#download-cta) */
    .cta-banner-wrapper {
      background: linear-gradient(135deg, #1E56A0 0%, #0B192C 100%);
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      color: #fff;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(11, 25, 44, 0.2);
    }
    .cta-banner-wrapper::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, rgba(0, 168, 150, 0.15) 0%, transparent 60%);
      pointer-events: none;
    }
    .cta-title {
      font-size: 2.4rem;
      font-weight: 800;
      margin-bottom: 16px;
      position: relative;
    }
    .cta-desc {
      font-size: 1.1rem;
      color: rgba(255, 255, 255, 0.85);
      max-width: 680px;
      margin: 0 auto 36px;
      position: relative;
    }
    .cta-form {
      display: flex;
      justify-content: center;
      max-width: 520px;
      margin: 0 auto 28px;
      gap: 12px;
      position: relative;
    }
    .cta-input {
      flex: 1;
      padding: 14px 20px;
      border-radius: var(--radius-full);
      border: 1px solid rgba(255, 255, 255, 0.3);
      background: rgba(255, 255, 255, 0.12);
      color: #fff;
      font-size: 0.95rem;
      backdrop-filter: blur(6px);
      outline: none;
    }
    .cta-input::placeholder {
      color: rgba(255, 255, 255, 0.6);
    }
    .cta-input:focus {
      border-color: #fff;
      background: rgba(255, 255, 255, 0.2);
    }
    .btn-cta-submit {
      background-color: var(--accent-warm);
      color: #fff;
      border: none;
      padding: 14px 28px;
      border-radius: var(--radius-full);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(255, 107, 53, 0.3);
    }
    .btn-cta-submit:hover {
      background-color: #f05a22;
    }
    .cta-platforms {
      display: flex;
      justify-content: center;
      gap: 24px;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.7);
      position: relative;
    }

    /* 页脚 */
    .site-footer {
      background-color: #0B192C;
      color: #94A3B8;
      padding: 70px 0 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h3 {
      font-size: 1.35rem;
      color: #fff;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 20px;
      font-size: 0.88rem;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      color: #fff;
      margin-bottom: 18px;
      font-weight: 600;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a:hover {
      color: #fff;
      padding-left: 4px;
    }
    .footer-contact-item {
      margin-bottom: 12px;
      line-height: 1.6;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
    }
    .footer-bottom a {
      color: #94A3B8;
    }
    .footer-bottom a:hover {
      color: #fff;
    }

    /* 移动端菜单抽屉 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--primary);
      cursor: pointer;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-subnav-panel {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-6 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
        align-items: flex-start;
      }
      .main-nav.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .nav-action {
        display: none;
      }
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-subnav-panel {
        grid-template-columns: 1fr;
        margin-top: -30px;
      }
      .grid-3 {
        grid-template-columns: 1fr;
      }
      .about-dual-wrap {
        grid-template-columns: 1fr;
      }
      .about-media-box img {
        height: 280px;
      }
      .grid-6 {
        grid-template-columns: 1fr;
      }
      .logic-grid {
        grid-template-columns: 1fr;
      }
      .steps-timeline {
        grid-template-columns: 1fr;
      }
      .metrics-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: 1fr;
      }
      .stories-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        flex-direction: column;
      }
      .section {
        padding: 60px 0;
      }
    }