/* roulang page: index */
:root {
      --primary: #0052D9;
      --primary-hover: #003cab;
      --primary-light: #EBF2FF;
      --accent: #00A870;
      --accent-cyan: #00A3C4;
      --bg-body: #F4F7FA;
      --bg-white: #FFFFFF;
      --bg-dark: #0A1128;
      --bg-dark-card: #131E3D;
      --text-title: #0B1528;
      --text-main: #3E495F;
      --text-muted: #7A869A;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --shadow-sm: 0 2px 8px rgba(0, 40, 100, 0.04);
      --shadow-card: 0 4px 20px rgba(0, 40, 100, 0.06), 0 1px 3px rgba(0, 0, 0, 0.02);
      --shadow-hover: 0 12px 32px rgba(0, 82, 217, 0.12);
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

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

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

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

    button, input, select, textarea {
      font: inherit;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶栏与主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: var(--bg-white);
      box-shadow: 0 2px 12px rgba(11, 21, 40, 0.05);
    }

    .topbar {
      background-color: #F8FAFC;
      border-bottom: 1px solid #EDF2F7;
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 6px 0;
    }

    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .topbar-info {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .navbar {
      height: 76px;
      display: flex;
      align-items: center;
    }

    .navbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-badge {
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--primary) 0%, #2979FF 100%);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.5px;
    }

    .logo-text {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-title);
      letter-spacing: -0.5px;
    }

    .logo-text span {
      color: var(--primary);
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 28px;
      align-items: center;
    }

    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-title);
      padding: 6px 0;
      position: relative;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary);
      transition: var(--transition);
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9375rem;
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #fff;
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(0, 82, 217, 0.35);
      transform: translateY(-1px);
    }

    .btn-outline {
      background-color: transparent;
      border-color: var(--primary);
      color: var(--primary);
    }

    .btn-outline:hover {
      background-color: var(--primary-light);
    }

    .btn-light {
      background-color: #fff;
      color: var(--text-title);
    }

    .btn-light:hover {
      background-color: #F8FAFC;
      transform: translateY(-1px);
    }

    .mobile-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-title);
      transition: var(--transition);
    }

    /* 板块统一排版 */
    .section-wrap {
      padding: 100px 0;
      position: relative;
    }

    .bg-white { background-color: var(--bg-white); }
    .bg-alt { background-color: #F8FAFC; }
    .bg-dark {
      background-color: var(--bg-dark);
      color: #E2E8F0;
    }

    .section-header {
      margin-bottom: 56px;
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-full);
      font-size: 0.8125rem;
      font-weight: 700;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }

    .section-tag.dark {
      background-color: rgba(0, 82, 217, 0.2);
      color: #60A5FA;
      border: 1px solid rgba(96, 165, 250, 0.3);
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--text-title);
      line-height: 1.3;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .bg-dark .section-title {
      color: #FFFFFF;
    }

    .section-subtitle {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .bg-dark .section-subtitle {
      color: #94A3B8;
    }

    /* 板块 1: Hero Banner (视频质感大屏) */
    .hero-section {
      position: relative;
      background: radial-gradient(circle at 80% 20%, #1e3a8a 0%, #0B1528 70%);
      color: #fff;
      padding: 120px 0 100px 0;
      overflow: hidden;
    }

    .hero-backdrop {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.28;
      filter: saturate(1.2);
      mix-blend-mode: luminosity;
    }

    .hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(180deg, rgba(11, 21, 40, 0.85) 0%, rgba(10, 17, 40, 0.95) 100%);
    }

    .hero-content-box {
      position: relative;
      z-index: 2;
      max-width: 940px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 6px 18px;
      border-radius: var(--radius-full);
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.18);
      font-size: 0.875rem;
      color: #E2E8F0;
      margin-bottom: 28px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent);
      box-shadow: 0 0 10px var(--accent);
    }

    .hero-title {
      font-size: 3.25rem;
      font-weight: 800;
      line-height: 1.22;
      margin-bottom: 24px;
      color: #FFFFFF;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(90deg, #60A5FA 0%, #38BDF8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: #CBD5E1;
      max-width: 840px;
      margin: 0 auto 40px auto;
      line-height: 1.85;
      font-weight: 400;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 20px;
      margin-bottom: 60px;
      flex-wrap: wrap;
    }

    .hero-stats-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      padding: 30px;
      background: rgba(255, 255, 255, 0.05);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.1);
      text-align: left;
    }

    .hero-stat-item h3 {
      font-size: 2rem;
      font-weight: 700;
      color: #60A5FA;
      margin-bottom: 4px;
    }

    .hero-stat-item p {
      font-size: 0.875rem;
      color: #94A3B8;
    }

    /* 板块 2: 全球覆盖与硬件接入架构 */
    .coverage-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .coverage-img-holder {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      position: relative;
    }

    .coverage-img-holder img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      transition: var(--transition);
    }

    .coverage-img-holder:hover img {
      transform: scale(1.03);
    }

    .coverage-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 24px;
    }

    .coverage-list-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .cov-icon {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }

    .cov-text h4 {
      font-size: 1.125rem;
      color: var(--text-title);
      margin-bottom: 4px;
    }

    .cov-text p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 3: 核心优势与技术矩阵看板 (6卡栅格) */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .matrix-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .matrix-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #BFDBFE;
    }

    .matrix-code {
      font-family: monospace;
      font-size: 0.8125rem;
      color: var(--primary);
      background: var(--primary-light);
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .matrix-card h3 {
      font-size: 1.25rem;
      color: var(--text-title);
      margin-bottom: 12px;
    }

    .matrix-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 4: 热门数字化产品展示 (3联排大卡) */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .product-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .product-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .product-media {
      height: 220px;
      overflow: hidden;
      position: relative;
    }

    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .product-card:hover .product-media img {
      transform: scale(1.05);
    }

    .product-body {
      padding: 26px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .product-body h3 {
      font-size: 1.3rem;
      color: var(--text-title);
      margin-bottom: 10px;
    }

    .product-body p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }

    .product-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
    }

    .product-tag-pill {
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 4px;
      background: #F1F5F9;
      color: #475569;
      font-weight: 500;
    }

    /* 板块 5: 传统训练 vs 科技赋能结果对比 (深色主题) */
    .contrast-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .contrast-card {
      padding: 40px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .contrast-card.trad {
      background: rgba(255, 255, 255, 0.03);
    }

    .contrast-card.tech {
      background: var(--bg-dark-card);
      border-color: rgba(96, 165, 250, 0.4);
      position: relative;
    }

    .contrast-card.tech::before {
      content: "体育科技推荐标准";
      position: absolute;
      top: -12px;
      right: 28px;
      background: var(--primary);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: var(--radius-full);
    }

    .contrast-card h3 {
      font-size: 1.5rem;
      margin-bottom: 20px;
      color: #FFFFFF;
    }

    .contrast-card.trad h3 {
      color: #94A3B8;
    }

    .contrast-metrics {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .c-metric-row {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding-bottom: 12px;
    }

    .c-metric-label {
      color: #94A3B8;
      font-size: 0.9375rem;
    }

    .c-metric-val {
      font-weight: 700;
      font-size: 1.0625rem;
      color: #F8FAFC;
    }

    .contrast-card.tech .c-metric-val {
      color: #38BDF8;
    }

    /* 板块 6: 体育科研实验室与视觉感知理念 */
    .lab-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .lab-box-text h3 {
      font-size: 1.85rem;
      color: #fff;
      margin-bottom: 18px;
      line-height: 1.3;
    }

    .lab-box-text p {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .lab-badges {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .lab-badge-box {
      background: rgba(255, 255, 255, 0.04);
      padding: 16px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--accent-cyan);
    }

    .lab-badge-box strong {
      display: block;
      color: #fff;
      margin-bottom: 4px;
      font-size: 0.95rem;
    }

    .lab-badge-box span {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    .lab-img-side {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .lab-img-side img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    /* 板块 7: 标杆历程与技术演进时间轴 */
    .timeline-stream {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .timeline-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .tl-year {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .timeline-card h4 {
      font-size: 1.125rem;
      color: var(--text-title);
      margin-bottom: 12px;
    }

    .timeline-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 8: 客户标杆场景与实战案例 */
    .case-stack {
      display: flex;
      flex-direction: column;
      gap: 40px;
    }

    .case-item {
      display: grid;
      grid-template-columns: 1fr 1fr;
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-color);
    }

    .case-item.reverse {
      direction: rtl;
    }

    .case-item.reverse .case-content {
      direction: ltr;
    }

    .case-thumb {
      height: 340px;
    }

    .case-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-content {
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .case-content .tag {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .case-content h3 {
      font-size: 1.5rem;
      color: var(--text-title);
      margin-bottom: 14px;
    }

    .case-content p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .case-stat-strip {
      display: flex;
      gap: 24px;
    }

    .cs-box h5 {
      font-size: 1.35rem;
      color: var(--accent);
      font-weight: 800;
    }

    .cs-box span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 9: 关键运营数据指标条 */
    .metrics-bar-section {
      background: linear-gradient(135deg, #0052D9 0%, #003cab 100%);
      color: #fff;
      padding: 60px 0;
    }

    .metrics-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }

    .metric-col {
      padding: 10px;
    }

    .metric-num {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }

    .metric-label {
      font-size: 0.95rem;
      color: #BFDBFE;
    }

    /* 板块 10: 行业专家评审与学术机构背书 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testimonial-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .test-quote {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 24px;
      position: relative;
    }

    .test-user {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    .test-avatar {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .test-meta h5 {
      font-size: 0.95rem;
      color: var(--text-title);
    }

    .test-meta span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块 11: 体育科技资讯与工程洞察 */
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .insight-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .insight-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .insight-img {
      height: 190px;
      overflow: hidden;
    }

    .insight-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .insight-card:hover .insight-img img {
      transform: scale(1.05);
    }

    .insight-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .insight-meta-date {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .insight-content h3 {
      font-size: 1.15rem;
      color: var(--text-title);
      margin-bottom: 10px;
      line-height: 1.45;
    }

    .insight-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .insight-link {
      margin-top: auto;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 板块 12: 算法与高可用保障体系 (4卡横排) */
    .assure-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .assure-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-card);
      text-align: center;
    }

    .assure-icon {
      width: 52px;
      height: 52px;
      background: #F0FDF4;
      color: var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px auto;
      font-size: 1.25rem;
      font-weight: 800;
    }

    .assure-card h4 {
      font-size: 1.1rem;
      color: var(--text-title);
      margin-bottom: 8px;
    }

    .assure-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 13: 常见技术答疑 FAQ (手风琴) */
    .faq-layout {
      display: grid;
      grid-template-columns: 0.85fr 1.15fr;
      gap: 48px;
      align-items: flex-start;
    }

    .faq-side-intro h3 {
      font-size: 1.85rem;
      color: var(--text-title);
      margin-bottom: 14px;
      line-height: 1.35;
    }

    .faq-side-intro p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .accordion-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .accordion-item {
      background: var(--bg-white);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .accordion-header {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background: #fff;
      transition: var(--transition);
    }

    .accordion-header:hover {
      background: #F8FAFC;
    }

    .accordion-header h4 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-title);
    }

    .accordion-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

    .accordion-item.active .accordion-icon {
      transform: rotate(45deg);
    }

    .accordion-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      background: #FAFBFD;
      padding: 0 22px;
    }

    .accordion-item.active .accordion-body {
      max-height: 220px;
      padding: 16px 22px 20px 22px;
      border-top: 1px solid #EDF2F7;
    }

    .accordion-body p {
      font-size: 0.9rem;
      color: var(--text-main);
      line-height: 1.65;
    }

    /* 板块 14: 方案预约与技术转化表单 */
    .conversion-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      box-shadow: 0 16px 40px rgba(0, 40, 100, 0.08);
      border: 1px solid #DCE6F5;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 48px;
    }

    .conv-info h3 {
      font-size: 2rem;
      color: var(--text-title);
      margin-bottom: 16px;
    }

    .conv-info p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 24px;
    }

    .conv-highlights {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .conv-highlights li {
      font-size: 0.9rem;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .conv-highlights li::before {
      content: "✓";
      color: var(--accent);
      font-weight: 800;
    }

    .form-wrapper {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-row-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-title);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #CBD5E1;
      border-radius: var(--radius-sm);
      background: #F8FAFC;
      color: var(--text-title);
      font-size: 0.9rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.15);
    }

    /* 页脚设计 */
    .site-footer {
      background-color: var(--bg-dark);
      color: #94A3B8;
      font-size: 0.875rem;
      padding-top: 72px;
      padding-bottom: 36px;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand .logo-text {
      color: #FFFFFF;
      font-size: 1.4rem;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.7;
      color: #64748B;
      font-size: 0.875rem;
      margin-bottom: 20px;
      max-width: 320px;
    }

    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1rem;
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul a:hover {
      color: #FFFFFF;
    }

    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
      color: #64748B;
    }

    .footer-bottom a {
      color: #94A3B8;
    }

    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 移动端与平板响应式适配 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.6rem; }
      .matrix-grid, .products-grid, .testimonial-grid, .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-stream, .assure-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-stats-strip, .metrics-row {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 991px) {
      .navbar { height: 68px; }
      .nav-links {
        position: fixed;
        top: 68px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        display: none;
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-toggle {
        display: flex;
      }
      .coverage-grid, .contrast-wrapper, .lab-grid, .faq-layout, .conversion-card {
        grid-template-columns: 1fr;
      }
      .case-item {
        grid-template-columns: 1fr;
      }
      .case-item.reverse {
        direction: ltr;
      }
      .form-row-2 {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .hero-title { font-size: 2rem; }
      .hero-desc { font-size: 1rem; }
      .matrix-grid, .products-grid, .testimonial-grid, .insights-grid, .assure-grid, .timeline-stream {
        grid-template-columns: 1fr;
      }
      .hero-stats-strip, .metrics-row {
        grid-template-columns: 1fr;
      }
      .conversion-card {
        padding: 32px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap {
        padding: 60px 0;
      }
    }