/* roulang page: index */
:root {
      --primary: #0F9D58;
      --primary-hover: #0b8043;
      --primary-light: #e6f4ea;
      --accent: #FF6D00;
      --accent-hover: #e65100;
      --dark-bg: #12161A;
      --dark-card: #1c2228;
      --light-bg: #F8F9FA;
      --white: #FFFFFF;
      --text-main: #212529;
      --text-muted: #5F6368;
      --text-light: #e8eaed;
      --border-color: #E2E8F0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.12);
      --transition: all 0.28s ease-in-out;
      --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-family);
      color: var(--text-main);
      background-color: var(--white);
      line-height: 1.7;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部辅助条 */
    .top-bar {
      background-color: #0b1014;
      color: #9aa0a6;
      font-size: 0.85rem;
      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-info {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-bar-info span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .top-bar-tag {
      color: var(--primary);
      font-weight: 500;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--primary), #00793b);
      color: var(--white);
      width: 38px;
      height: 38px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      font-size: 1.15rem;
      font-weight: 800;
      box-shadow: 0 4px 10px rgba(15, 157, 88, 0.3);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: #3c4043;
      padding: 6px 0;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 26px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      gap: 8px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: var(--white);
      box-shadow: 0 4px 14px rgba(15, 157, 88, 0.28);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(15, 157, 88, 0.36);
    }
    .btn-accent {
      background-color: var(--accent);
      color: var(--white);
      box-shadow: 0 4px 14px rgba(255, 109, 0, 0.3);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 109, 0, 0.4);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background-color: var(--white);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .btn-dark-outline {
      border-color: rgba(255, 255, 255, 0.2);
      color: var(--white);
      background: transparent;
    }
    .btn-dark-outline:hover {
      border-color: var(--primary);
      background: rgba(15, 157, 88, 0.15);
      color: var(--white);
    }

    /* 板块通用 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--light-bg);
    }
    .section-dark {
      background-color: var(--dark-bg);
      color: var(--white);
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 14px;
      border-radius: 30px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-dark .section-tag {
      background: rgba(15, 157, 88, 0.2);
      color: #34d399;
    }
    .section-title {
      font-size: 2.15rem;
      line-height: 1.35;
      font-weight: 700;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .section-dark .section-desc {
      color: #9aa0a6;
    }

    /* Section 1: Hero Banner (蓝图：竖屏感大视觉 + 跟买/了解双CTA) */
    .hero-section {
      padding: 60px 0 90px;
      background: linear-gradient(180deg, #f0f7f3 0%, #ffffff 100%);
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 3rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-content h1 span {
      color: var(--primary);
    }
    .hero-lead {
      font-size: 1.1rem;
      color: #4b5563;
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .hero-cta-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      padding-top: 28px;
      border-top: 1px solid var(--border-color);
    }
    .hero-metric-item h4 {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.2;
    }
    .hero-metric-item h4 span {
      color: var(--accent);
      font-size: 1.1rem;
      font-weight: 600;
    }
    .hero-metric-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }
    /* 竖屏感视效框架 */
    .hero-visual {
      position: relative;
      display: flex;
      justify-content: center;
    }
    .vertical-screen-mockup {
      width: 320px;
      height: 580px;
      background: #000;
      border-radius: 40px;
      padding: 12px;
      box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.3), 0 0 0 8px #2d3748;
      position: relative;
      overflow: hidden;
    }
    .screen-inner {
      width: 100%;
      height: 100%;
      border-radius: 30px;
      overflow: hidden;
      position: relative;
      background-color: #0b131b;
    }
    .screen-inner img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.85;
    }
    .screen-overlay-data {
      position: absolute;
      bottom: 20px;
      left: 16px;
      right: 16px;
      background: rgba(18, 22, 26, 0.88);
      backdrop-filter: blur(10px);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--white);
    }
    .overlay-match-title {
      font-size: 0.85rem;
      font-weight: 600;
      color: #34d399;
      display: flex;
      justify-content: space-between;
      margin-bottom: 6px;
    }
    .overlay-match-score {
      font-size: 1.2rem;
      font-weight: 700;
      display: flex;
      justify-content: space-around;
      align-items: center;
      margin: 8px 0;
    }
    .overlay-status {
      font-size: 0.75rem;
      text-align: center;
      color: #9aa0a6;
      border-top: 1px dashed rgba(255, 255, 255, 0.15);
      padding-top: 6px;
    }
    .screen-floating-tag {
      position: absolute;
      top: 24px;
      right: 20px;
      background: rgba(255, 109, 0, 0.9);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 20px;
      box-shadow: 0 4px 12px rgba(255, 109, 0, 0.4);
    }

    /* Section 2: 安全主张（数据安全与合规治理） */
    .security-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .security-card {
      background: var(--white);
      padding: 36px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .security-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .security-icon {
      width: 52px;
      height: 52px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .security-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .security-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Section 3: 检查项（系统技术就绪核验表） */
    .checklist-wrap {
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .checklist-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .checklist-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      padding: 16px;
      background: #fafbfc;
      border-radius: var(--radius-sm);
      border-left: 4px solid var(--primary);
    }
    .checklist-status {
      min-width: 28px;
      height: 28px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: bold;
    }
    .checklist-text h4 {
      font-size: 1.05rem;
      margin-bottom: 4px;
      color: var(--text-main);
    }
    .checklist-text p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* Section 4: 合规徽章与技术能力背书 */
    .badge-wall-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .badge-item {
      text-align: center;
      padding: 30px 20px;
      background: #fafbfc;
      border-radius: var(--radius-md);
      border: 1px solid #edf2f7;
    }
    .badge-mark {
      display: inline-block;
      font-size: 2.2rem;
      margin-bottom: 12px;
    }
    .badge-item h4 {
      font-size: 1.1rem;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .badge-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Section 5: 边界说明与技术标准（对比深色底座） */
    .boundary-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .boundary-visual {
      background: var(--dark-card);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      font-family: monospace;
      color: #a0aec0;
      font-size: 0.9rem;
      line-height: 1.7;
    }
    .boundary-code-line span.key { color: #f687b3; }
    .boundary-code-line span.str { color: #68d391; }
    .boundary-code-line span.num { color: #fbd38d; }
    .boundary-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .boundary-points li {
      position: relative;
      padding-left: 28px;
    }
    .boundary-points li::before {
      content: "■";
      position: absolute;
      left: 0;
      color: var(--primary);
      font-size: 0.9rem;
      top: 2px;
    }
    .boundary-points h4 {
      font-size: 1.15rem;
      color: var(--white);
      margin-bottom: 6px;
    }
    .boundary-points p {
      font-size: 0.92rem;
      color: #a0aec0;
      line-height: 1.6;
    }

    /* Section 6: 核心产品与解决方案矩阵 */
    .solution-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .solution-card {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .solution-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-5px);
      border-color: var(--primary);
    }
    .solution-card-img {
      height: 190px;
      overflow: hidden;
      position: relative;
    }
    .solution-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .solution-card:hover .solution-card-img img {
      transform: scale(1.05);
    }
    .solution-pill {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 157, 88, 0.92);
      color: #fff;
      padding: 3px 10px;
      font-size: 0.75rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
    }
    .solution-card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-card-body h3 {
      font-size: 1.25rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .solution-card-body p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
      flex: 1;
    }
    .solution-card-features {
      list-style: none;
      margin-bottom: 20px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }
    .solution-card-features li {
      font-size: 0.85rem;
      color: #4a5568;
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .solution-card-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }

    /* Section 7: 多维应用场景演练 (Tab 切换卡片) */
    .scenario-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }
    .tab-btn {
      padding: 10px 24px;
      border-radius: 30px;
      border: 1px solid var(--border-color);
      background: var(--white);
      color: var(--text-main);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
    }
    .tab-btn.active, .tab-btn:hover {
      background: var(--primary);
      color: var(--white);
      border-color: var(--primary);
    }
    .scenario-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
      background: var(--white);
      border: 1px solid var(--border-color);
      padding: 36px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }
    .scenario-info h3 {
      font-size: 1.6rem;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .scenario-info p {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .scenario-highlights {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 24px;
    }
    .highlight-box {
      background: #f7fafc;
      padding: 14px;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--primary);
    }
    .highlight-box h5 {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .highlight-box span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .scenario-image {
      border-radius: var(--radius-md);
      overflow: hidden;
      max-height: 340px;
      box-shadow: var(--shadow-sm);
    }
    .scenario-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* Section 8: 标杆客户落地成果 (图文对比) */
    .story-card {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
      background: var(--white);
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }
    .story-left h3 {
      font-size: 1.65rem;
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .story-left p {
      font-size: 0.98rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.75;
    }
    .story-data-badges {
      display: flex;
      gap: 20px;
      margin-bottom: 24px;
    }
    .data-badge-item {
      background: var(--primary-light);
      padding: 12px 18px;
      border-radius: var(--radius-sm);
    }
    .data-badge-item strong {
      display: block;
      font-size: 1.4rem;
      color: var(--primary);
    }
    .data-badge-item span {
      font-size: 0.8rem;
      color: #374151;
    }
    .story-right {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .story-right img {
      width: 100%;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    /* Section 9: 核心性能与业务数据统计条 */
    .metrics-bar-section {
      background: linear-gradient(135deg, #0e171f 0%, #15222e 100%);
      color: var(--white);
      padding: 60px 0;
    }
    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metrics-bar-col {
      padding: 10px 16px;
      position: relative;
    }
    .metrics-bar-col:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 20%;
      height: 60%;
      width: 1px;
      background: rgba(255, 255, 255, 0.12);
    }
    .metrics-num {
      font-size: 2.75rem;
      font-weight: 800;
      color: #34d399;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metrics-num span {
      color: var(--accent);
      font-size: 1.5rem;
    }
    .metrics-title {
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 4px;
    }
    .metrics-desc {
      font-size: 0.85rem;
      color: #94a3b8;
    }

    /* Section 10: 对比差异 (自研 vs 商业化技术方案) */
    .table-container {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-table th.highlight-col {
      background: var(--primary-light);
      color: var(--primary);
      font-size: 1.05rem;
    }
    .compare-table td.highlight-col {
      background: rgba(15, 157, 88, 0.03);
      font-weight: 600;
      color: #0b8043;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }

    /* Section 11: 体育技术资讯与行业洞察 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .news-card-thumb {
      height: 180px;
      overflow: hidden;
    }
    .news-card-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-card-thumb img {
      transform: scale(1.04);
    }
    .news-card-body {
      padding: 22px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-card-body h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
      line-height: 1.45;
      color: var(--text-main);
    }
    .news-card-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }
    .news-link {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Section 12: 异议拆解与常见技术答疑 (FAQ) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item[open] {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      list-style: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--primary);
      transition: transform 0.2s ease;
    }
    .faq-item[open] .faq-summary::after {
      content: "−";
      transform: rotate(180deg);
    }
    .faq-content {
      padding: 0 24px 22px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    /* Section 13: 商业保障与交付承诺条 */
    .guarantee-bar {
      background: #f1f5f9;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 44px 0;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .guarantee-icon {
      width: 48px;
      height: 48px;
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--primary);
      flex-shrink: 0;
    }
    .guarantee-text h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 2px;
    }
    .guarantee-text p {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* Section 14: 底部转化区 (Final CTA & 表单) */
    .final-cta-box {
      background: linear-gradient(135deg, #101820 0%, #1a2733 100%);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      color: var(--white);
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }
    .cta-text h2 {
      font-size: 2.2rem;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .cta-text p {
      font-size: 1rem;
      color: #94a3b8;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .cta-points li {
      font-size: 0.9rem;
      color: #cbd5e1;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .cta-points li span {
      color: #34d399;
      font-weight: bold;
    }
    .lead-form {
      background: var(--white);
      padding: 32px;
      border-radius: var(--radius-md);
      color: var(--text-main);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: #374151;
    }
    .form-input {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      outline: none;
      transition: var(--transition);
    }
    .form-input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(15, 157, 88, 0.15);
    }
    .form-submit-btn {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
    }

    /* 页脚设计 */
    .site-footer {
      background: #090d11;
      color: #718096;
      font-size: 0.9rem;
      padding: 70px 0 30px;
      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-brand h3 {
      color: var(--white);
      font-size: 1.25rem;
      margin-bottom: 14px;
      letter-spacing: -0.3px;
    }
    .footer-brand p {
      line-height: 1.7;
      font-size: 0.88rem;
      margin-bottom: 16px;
    }
    .footer-col h4 {
      color: var(--white);
      font-size: 1rem;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-contact p {
      margin-bottom: 10px;
      line-height: 1.6;
    }
    .footer-contact strong {
      color: #cbd5e1;
    }
    .footer-bottom {
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
    }
    .footer-legal-links {
      display: flex;
      gap: 18px;
    }

    /* 移动端底部悬浮吸顶条 */
    .mobile-sticky-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(18, 22, 26, 0.96);
      backdrop-filter: blur(10px);
      padding: 10px 16px;
      z-index: 999;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.2);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .sticky-bar-inner {
      display: flex;
      gap: 12px;
      align-items: center;
      max-width: 500px;
      margin: 0 auto;
    }
    .sticky-bar-inner .btn {
      flex: 1;
      padding: 11px 8px;
      font-size: 0.88rem;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-cta-group {
        justify-content: center;
      }
      .hero-metrics {
        max-width: 600px;
        margin: 0 auto;
      }
      .hero-visual {
        margin-top: 30px;
      }
      .boundary-content {
        grid-template-columns: 1fr;
      }
      .scenario-panel {
        grid-template-columns: 1fr;
      }
      .story-card {
        grid-template-columns: 1fr;
      }
      .final-cta-box {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .badge-wall-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      section {
        padding: 60px 0;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
        gap: 16px;
        align-items: flex-start;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-action .btn {
        display: none;
      }
      .security-grid,
      .solution-cards-grid,
      .news-grid,
      .checklist-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar-col:nth-child(2)::after {
        display: none;
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .mobile-sticky-bar {
        display: block;
      }
      body {
        padding-bottom: 64px;
      }
      .hero-content h1 {
        font-size: 2.15rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
    }

    @media (max-width: 480px) {
      .metrics-bar-grid {
        grid-template-columns: 1fr;
      }
      .metrics-bar-col::after {
        display: none !important;
      }
      .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .vertical-screen-mockup {
        width: 290px;
        height: 520px;
      }
    }