/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-hover: #0C4399;
      --primary-soft: rgba(15, 82, 186, 0.08);
      --accent: #00A86B;
      --accent-hover: #008f5b;
      --accent-soft: rgba(0, 168, 107, 0.1);
      --bg-page: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0A192F;
      --bg-dark-card: #112240;
      --text-title: #1E293B;
      --text-body: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
      --border-dark: #233554;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --radius-xl: 16px;
      --shadow-sm: 0 2px 4px rgba(15, 82, 186, 0.04);
      --shadow-md: 0 6px 16px -2px rgba(15, 82, 186, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 25px -5px rgba(15, 82, 186, 0.12), 0 10px 10px -5px rgba(15, 82, 186, 0.04);
      --font-stack: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --transition: all 0.28s 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: var(--font-stack);
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      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-family: inherit;
      font-size: inherit;
    }

    /* 容器体系 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 通用组件与布局 */
    .section-wrap {
      padding: 96px 0;
      position: relative;
    }

    .section-alt {
      background-color: #FFFFFF;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.125rem;
      font-weight: 700;
      color: var(--text-title);
      line-height: 1.35;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 0.9375rem;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
      min-height: 46px;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(15, 82, 186, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 6px 18px rgba(15, 82, 186, 0.35);
      transform: translateY(-2px);
    }

    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(0, 168, 107, 0.25);
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
    }

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

    .btn-outline:hover {
      background-color: var(--primary-soft);
      transform: translateY(-2px);
    }

    .btn-outline-white {
      background-color: transparent;
      color: #FFFFFF;
      border-color: rgba(255, 255, 255, 0.6);
    }

    .btn-outline-white:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
      color: #FFFFFF;
    }

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: #FFFFFF;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      backdrop-filter: blur(8px);
    }

    .top-bar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.8125rem;
      color: #64748B;
      padding: 6px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-tags span {
      margin-right: 18px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .top-bar-tags span::before {
      content: "";
      display: inline-block;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background-color: var(--accent);
    }

    .main-nav-bar {
      background: #FFFFFF;
      padding: 14px 0;
      transition: var(--transition);
    }

    .main-nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .brand-logo svg {
      width: 32px;
      height: 32px;
      fill: var(--primary);
    }

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

    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-title);
      position: relative;
      padding: 6px 0;
    }

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

    .nav-link.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-btn svg {
      width: 28px;
      height: 28px;
      stroke: var(--text-title);
    }

    /* 1. 首屏 Hero */
    .hero-section {
      position: relative;
      padding: 80px 0 90px;
      background: linear-gradient(135deg, #EEF4FD 0%, #F8FAFC 100%);
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      align-items: center;
      gap: 48px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: #FFFFFF;
      border: 1px solid #D0E2FF;
      border-radius: 30px;
      font-size: 0.875rem;
      color: var(--primary);
      font-weight: 600;
      box-shadow: 0 2px 8px rgba(15, 82, 186, 0.08);
      margin-bottom: 24px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 168, 107, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 168, 107, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 168, 107, 0); }
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--text-title);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 1.0625rem;
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 36px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 24px;
      padding-top: 24px;
      border-top: 1px dashed #CBD5E1;
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.875rem;
      color: #64748B;
      font-weight: 500;
    }

    .trust-item svg {
      width: 18px;
      height: 18px;
      fill: var(--accent);
    }

    .hero-visual-box {
      position: relative;
    }

    .hero-card-img {
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255, 255, 255, 0.8);
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    .hero-float-card {
      position: absolute;
      bottom: -24px;
      left: -24px;
      background: #FFFFFF;
      padding: 16px 20px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 14px;
      z-index: 2;
    }

    .float-card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .float-card-icon svg {
      width: 24px;
      height: 24px;
      fill: var(--primary);
    }

    .float-card-text h4 {
      font-size: 0.9375rem;
      color: var(--text-title);
      font-weight: 700;
    }

    .float-card-text p {
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 2. 品牌与体系介绍区 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .intro-img-wrap {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

    .intro-specs-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 24px;
    }

    .spec-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 16px;
      background: #F8FAFC;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--primary);
    }

    .spec-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      fill: var(--primary);
      margin-top: 2px;
    }

    .spec-item h4 {
      font-size: 1rem;
      color: var(--text-title);
      margin-bottom: 4px;
    }

    .spec-item p {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.5;
    }

    /* 3. 核心优势六矩阵 */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .advantage-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .advantage-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--primary);
      opacity: 0;
      transition: var(--transition);
    }

    .advantage-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }

    .advantage-card:hover::before {
      opacity: 1;
    }

    .advantage-icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }

    .advantage-icon-box svg {
      width: 28px;
      height: 28px;
      fill: var(--primary);
    }

    .advantage-card h3 {
      font-size: 1.1875rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }

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

    /* 4. 数字服务核心产品矩阵 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .product-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
    }

    .product-media {
      height: 190px;
      overflow: hidden;
      position: relative;
    }

    .product-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .product-content {
      padding: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .product-badge-sub {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .product-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }

    .product-desc {
      font-size: 0.875rem;
      color: var(--text-body);
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .feature-list {
      list-style: none;
      margin-bottom: 24px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    .feature-list li {
      font-size: 0.875rem;
      color: #475569;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .feature-list li svg {
      width: 16px;
      height: 16px;
      fill: var(--accent);
      flex-shrink: 0;
    }

    .product-footer-action {
      margin-top: auto;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .product-tag-level {
      font-size: 0.75rem;
      color: #64748B;
      background: #F1F5F9;
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* 5. 深色案例与数字化管理理念区 */
    .dark-concept-section {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      padding: 100px 0;
    }

    .dark-concept-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .dark-text-block .section-tag {
      background: rgba(0, 168, 107, 0.15);
      color: #00E699;
    }

    .dark-title {
      font-size: 2.25rem;
      font-weight: 800;
      color: #FFFFFF;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .dark-desc {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.75;
      margin-bottom: 30px;
    }

    .dark-core-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .dark-point-box {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 18px;
    }

    .dark-point-box h5 {
      font-size: 0.9375rem;
      color: #38BDF8;
      margin-bottom: 6px;
      font-weight: 600;
    }

    .dark-point-box p {
      font-size: 0.8125rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    .dark-visual-panel {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      border: 1px solid var(--border-dark);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }

    /* 6. 场景化落地与用户故事区 */
    .use-cases-layout {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 36px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .case-nav-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .case-tab-btn {
      width: 100%;
      text-align: left;
      padding: 18px 20px;
      border-radius: var(--radius-md);
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: var(--transition);
    }

    .case-tab-btn.active {
      background: var(--primary-soft);
      border-color: var(--primary);
    }

    .case-tab-btn h4 {
      font-size: 1rem;
      color: var(--text-title);
      margin-bottom: 4px;
    }

    .case-tab-btn.active h4 {
      color: var(--primary);
      font-weight: 700;
    }

    .case-tab-btn p {
      font-size: 0.8125rem;
      color: #64748B;
    }

    .case-content-panel {
      position: relative;
    }

    .case-pane {
      display: none;
      animation: fadeIn 0.3s ease-in-out;
    }

    .case-pane.active {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: center;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .case-pane-img {
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      height: 280px;
    }

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

    .case-pane-info h3 {
      font-size: 1.375rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }

    .case-pane-info p {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .case-stat-pill {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #F1F5F9;
      padding: 10px 16px;
      border-radius: 8px;
    }

    .case-stat-num {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
    }

    .case-stat-label {
      font-size: 0.8125rem;
      color: #475569;
    }

    /* 7. 关键运营数据统计条 */
    .metrics-bar-section {
      background: linear-gradient(90deg, #0F52BA 0%, #153E7E 100%);
      color: #FFFFFF;
      padding: 56px 0;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-item {
      padding: 0 16px;
      border-right: 1px solid rgba(255, 255, 255, 0.15);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-value {
      font-size: 2.75rem;
      font-weight: 800;
      letter-spacing: -1px;
      margin-bottom: 6px;
      color: #FFFFFF;
    }

    .metric-value span {
      font-size: 1.5rem;
      color: #38BDF8;
      font-weight: 600;
    }

    .metric-label {
      font-size: 0.9375rem;
      color: #CBD5E1;
      font-weight: 500;
    }

    /* 8. 客户与行业认同评价区 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .testimonial-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-stars {
      display: flex;
      gap: 4px;
      margin-bottom: 16px;
    }

    .testimonial-stars svg {
      width: 18px;
      height: 18px;
      fill: #F59E0B;
    }

    .testimonial-quote {
      font-size: 0.9375rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 24px;
      flex-grow: 1;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 16px;
      border-top: 1px solid #F1F5F9;
    }

    .author-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 700;
      font-size: 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .author-info h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-title);
    }

    .author-info p {
      font-size: 0.75rem;
      color: #64748B;
    }

    /* 9. 数字体育行业资讯与专业证据区 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .news-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .news-card-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .news-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.75rem;
      color: #94A3B8;
      margin-bottom: 12px;
    }

    .news-tag {
      color: var(--primary);
      font-weight: 600;
      background: var(--primary-soft);
      padding: 2px 8px;
      border-radius: 4px;
    }

    .news-title {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-title);
      line-height: 1.45;
      margin-bottom: 12px;
    }

    .news-desc {
      font-size: 0.875rem;
      color: var(--text-body);
      line-height: 1.6;
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .news-footer-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 10. 异议拆解与 FAQ 手风琴区 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: #CBD5E1;
      box-shadow: var(--shadow-sm);
    }

    .faq-header {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: transparent;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      font-size: 1.0625rem;
      font-weight: 600;
      color: var(--text-title);
    }

    .faq-header:hover {
      color: var(--primary);
    }

    .faq-chevron {
      width: 20px;
      height: 20px;
      fill: none;
      stroke: #64748B;
      stroke-width: 2;
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }

    .faq-item.active .faq-chevron {
      transform: rotate(180deg);
      stroke: var(--primary);
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      padding: 0 24px;
      color: var(--text-body);
      font-size: 0.9375rem;
      line-height: 1.7;
    }

    .faq-body-inner {
      padding-bottom: 22px;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }

    /* 11. 综合服务保障与合规承诺条 */
    .guarantee-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 48px 0;
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }

    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .guarantee-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: #F1F5F9;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .guarantee-icon-box svg {
      width: 26px;
      height: 26px;
      fill: var(--primary);
    }

    .guarantee-text h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 2px;
    }

    .guarantee-text p {
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 12. 底部沉浸式转化区 */
    .conversion-card {
      background: linear-gradient(135deg, #0F52BA 0%, #1E40AF 100%);
      border-radius: var(--radius-xl);
      padding: 60px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
    }

    .conversion-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .conversion-info h2 {
      font-size: 2.125rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .conversion-info p {
      font-size: 1rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .conversion-form-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
      color: var(--text-title);
    }

    .form-group {
      margin-bottom: 16px;
    }

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

    .form-input {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.9375rem;
      color: var(--text-title);
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(15, 82, 186, 0.15);
    }

    .form-radio-group {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-top: 6px;
    }

    .form-radio-label {
      font-size: 0.8125rem;
      padding: 8px;
      background: #F8FAFC;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      text-align: center;
      cursor: pointer;
      display: block;
    }

    .form-radio-label input {
      display: none;
    }

    .form-radio-label:has(input:checked) {
      border-color: var(--primary);
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 600;
    }

    .form-privacy-note {
      font-size: 0.75rem;
      color: #64748B;
      margin-top: 12px;
      line-height: 1.5;
    }

    /* 页脚 */
    .site-footer {
      background: #0B132B;
      color: #94A3B8;
      padding: 72px 0 24px;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 56px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }

    .footer-col p {
      font-size: 0.875rem;
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      font-size: 0.875rem;
      color: #94A3B8;
    }

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

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.875rem;
      margin-bottom: 12px;
    }

    .footer-contact-item svg {
      width: 18px;
      height: 18px;
      fill: #38BDF8;
      flex-shrink: 0;
    }

    .footer-bottom-bar {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
    }

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

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

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .intro-grid, .dark-concept-grid, .conversion-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-visual-box {
        max-width: 600px;
        margin: 0 auto;
      }
      .use-cases-layout {
        grid-template-columns: 1fr;
      }
      .advantage-grid, .products-grid, .testimonials-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px 20px;
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .section-wrap {
        padding: 60px 0;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .hero-title {
        font-size: 2rem;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
        border-top: 1px solid var(--border-color);
        gap: 16px;
        align-items: flex-start;
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .advantage-grid, .products-grid, .testimonials-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .dark-core-points {
        grid-template-columns: 1fr;
      }
      .case-pane.active {
        grid-template-columns: 1fr;
      }
      .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .conversion-card {
        padding: 36px 20px;
      }
      .conversion-form-box {
        padding: 24px 16px;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 20px;
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom-bar {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .hero-float-card {
        display: none;
      }
    }