/* roulang page: index */
:root {
      --bg-light: #F5F6F8;
      --bg-dark: #0A0D12;
      --bg-card: #FFFFFF;
      --text-main: #0F141C;
      --text-muted: #4A5260;
      --text-sub: #8C95A6;
      --primary-cyan: #00E599;
      --primary-cyan-hover: #00C885;
      --accent-blue: #2A54FF;
      --slate-dark: #1E232D;
      --border-color: rgba(226, 232, 240, 0.85);
      --border-dark: rgba(255, 255, 255, 0.08);
      --shadow-sm: 0 4px 12px -2px rgba(15, 20, 28, 0.03);
      --shadow-lg: 0 16px 36px -6px rgba(15, 20, 28, 0.07);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --transition: cubic-bezier(0.16, 1, 0.3, 1) 0.3s;
    }

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

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

    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-topbar {
      background-color: var(--slate-dark);
      color: #94A3B8;
      font-size: 0.75rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

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

    .topbar-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary-cyan);
    }

    .topbar-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      background-color: var(--primary-cyan);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary-cyan);
    }

    .header-main {
      padding: 14px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--slate-dark);
      letter-spacing: -0.02em;
    }

    .brand-logo .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--slate-dark), #2D3748);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-cyan);
      font-weight: 900;
      font-size: 1.1rem;
      border: 1px solid rgba(0, 229, 153, 0.4);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .main-nav a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 4px 0;
    }

    .main-nav a:hover, .main-nav a.active {
      color: var(--text-main);
    }

    .main-nav a:hover::after, .main-nav a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary-cyan);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all var(--transition);
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary-cyan);
      color: var(--slate-dark);
      border-color: var(--primary-cyan);
    }

    .btn-primary:hover {
      background-color: var(--primary-cyan-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(0, 229, 153, 0.28);
    }

    .btn-dark {
      background-color: var(--slate-dark);
      color: #FFFFFF;
    }

    .btn-dark:hover {
      background-color: #12161E;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(15, 20, 28, 0.25);
    }

    .btn-outline {
      background-color: transparent;
      border-color: rgba(255, 255, 255, 0.2);
      color: #FFFFFF;
    }

    .btn-outline:hover {
      border-color: #FFFFFF;
      background-color: rgba(255, 255, 255, 0.08);
      transform: translateY(-2px);
    }

    /* 板块排版公用样式 */
    .section-wrap {
      padding: 100px 0;
      position: relative;
    }

    .section-dark {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }

    .section-header {
      margin-bottom: 56px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--accent-blue);
      background-color: rgba(42, 84, 255, 0.08);
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 12px;
    }

    .section-dark .section-tag {
      color: var(--primary-cyan);
      background-color: rgba(0, 229, 153, 0.1);
    }

    .section-title {
      font-size: clamp(1.85rem, 3.2vw, 2.5rem);
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

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

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 820px;
      line-height: 1.7;
    }

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

    /* 1. 首屏 Hero 架构 (路线图预告与版本节点) */
    .hero-roadmap {
      background: linear-gradient(180deg, #FFFFFF 0%, #F0F3F7 100%);
      padding: 90px 0 80px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-bg-overlay {
      position: absolute;
      top: 0;
      right: 0;
      width: 55%;
      height: 100%;
      background-image: url('/assets/images/backpic/back-1.jpg');
      background-size: cover;
      background-position: center;
      opacity: 0.12;
      pointer-events: none;
      mask-image: linear-gradient(to left, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 100%);
      -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 860px;
    }

    .hero-h1 {
      font-size: clamp(2.3rem, 4.6vw, 3.8rem);
      line-height: 1.15;
      font-weight: 800;
      color: var(--slate-dark);
      letter-spacing: -0.03em;
      margin-bottom: 24px;
    }

    .hero-h1 span {
      background: linear-gradient(135deg, var(--slate-dark) 40%, var(--accent-blue) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-p {
      font-size: 1.15rem;
      line-height: 1.75;
      color: var(--text-muted);
      margin-bottom: 36px;
    }

    .hero-roadmap-bar {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 28px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 32px;
    }

    .roadmap-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
    }

    .roadmap-header h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--slate-dark);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .roadmap-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }

    .roadmap-node {
      position: relative;
      padding-top: 18px;
    }

    .roadmap-node::before {
      content: "";
      position: absolute;
      top: 4px;
      left: 0;
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: #CBD5E1;
    }

    .roadmap-node.active::before {
      background-color: var(--primary-cyan);
      box-shadow: 0 0 10px var(--primary-cyan);
    }

    .roadmap-node.current::before {
      background-color: var(--accent-blue);
      box-shadow: 0 0 10px var(--accent-blue);
    }

    .roadmap-node h5 {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--slate-dark);
      margin-bottom: 4px;
    }

    .roadmap-node p {
      font-size: 0.78rem;
      color: var(--text-sub);
      line-height: 1.4;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 2. 安全主张板块 */
    .security-claims {
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }

    .security-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .claim-card {
      padding: 32px;
      background: var(--bg-light);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: all var(--transition);
    }

    .claim-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(0, 229, 153, 0.4);
    }

    .claim-icon {
      width: 48px;
      height: 48px;
      background: #FFFFFF;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: var(--accent-blue);
      margin-bottom: 20px;
      border: 1px solid rgba(226, 232, 240, 0.8);
    }

    .claim-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--slate-dark);
    }

    .claim-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 3. 系统交付检查项 ( Checklist ) */
    .checklist-section {
      background-color: var(--bg-light);
    }

    .check-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .check-item {
      display: flex;
      gap: 20px;
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .check-indicator {
      width: 28px;
      height: 28px;
      flex-shrink: 0;
      background: rgba(0, 229, 153, 0.15);
      color: #00875A;
      font-weight: 900;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      font-size: 0.85rem;
    }

    .check-body h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--slate-dark);
    }

    .check-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 4. 合规徽章与技术标准 */
    .compliance-badges {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .badges-flex {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .badge-box {
      border: 1px dashed var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      background-color: #FAFBFD;
    }

    .badge-code {
      font-family: monospace;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--accent-blue);
      margin-bottom: 8px;
      display: block;
    }

    .badge-name {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--slate-dark);
      margin-bottom: 6px;
    }

    .badge-desc {
      font-size: 0.78rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 5. 架构边界与职责说明 */
    .boundaries-section {
      background-color: var(--slate-dark);
      color: #FFFFFF;
    }

    .boundary-table-card {
      background: #151922;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .boundary-row {
      display: grid;
      grid-template-columns: 240px 1fr 1fr;
      padding: 20px 28px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      align-items: center;
    }

    .boundary-row:last-child {
      border-bottom: none;
    }

    .boundary-head {
      background: #0E1218;
      font-weight: 700;
      font-size: 0.9rem;
      color: #94A3B8;
      text-transform: uppercase;
    }

    .boundary-layer-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--primary-cyan);
    }

    .boundary-in-scope, .boundary-out-scope {
      font-size: 0.9rem;
      line-height: 1.6;
    }

    .boundary-in-scope {
      color: #E2E8F0;
    }

    .boundary-out-scope {
      color: #94A3B8;
    }

    /* 6. 核心产品矩阵三连 (卖点三连) */
    .core-features {
      background-color: var(--bg-light);
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 40px 32px;
      position: relative;
      overflow: hidden;
      transition: all var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(0, 229, 153, 0.5);
    }

    .feature-card-number {
      font-size: 3rem;
      font-weight: 900;
      color: rgba(15, 20, 28, 0.06);
      line-height: 1;
      position: absolute;
      top: 24px;
      right: 28px;
      font-family: monospace;
    }

    .feature-card h3 {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--slate-dark);
      margin-bottom: 16px;
      position: relative;
      z-index: 2;
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
      position: relative;
      z-index: 2;
    }

    .feature-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      position: relative;
      z-index: 2;
    }

    .feature-tag {
      font-size: 0.78rem;
      font-weight: 600;
      background: #EDF2F7;
      color: var(--slate-dark);
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* 7. 业务应用场景多维演示 */
    .scenarios-section {
      background-color: #FFFFFF;
    }

    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .scenario-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #FFFFFF;
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .scenario-img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }

    .scenario-body {
      padding: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

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

    .scenario-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .scenario-points {
      list-style: none;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .scenario-points li {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scenario-points li::before {
      content: "•";
      color: var(--accent-blue);
      font-weight: 900;
    }

    /* 8. 关键指标展示条 */
    .metrics-strip {
      background-color: var(--bg-dark);
      border-top: 1px solid var(--border-dark);
      border-bottom: 1px solid var(--border-dark);
      padding: 60px 0;
    }

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

    .metric-item .number {
      font-size: clamp(2.4rem, 4vw, 3.4rem);
      font-weight: 900;
      color: var(--primary-cyan);
      font-family: monospace;
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-item .label {
      font-size: 0.95rem;
      font-weight: 600;
      color: #E2E8F0;
      margin-bottom: 4px;
    }

    .metric-item .sub {
      font-size: 0.8rem;
      color: #64748B;
    }

    /* 9. 传统体育运维 vs 数字化平台 */
    .comparison-section {
      background-color: var(--bg-light);
    }

    .comp-table-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .comp-grid-row {
      display: grid;
      grid-template-columns: 280px 1fr 1fr;
      padding: 22px 32px;
      border-bottom: 1px solid var(--border-color);
      align-items: center;
    }

    .comp-grid-row:last-child {
      border-bottom: none;
    }

    .comp-grid-header {
      background: #F8FAFC;
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--slate-dark);
    }

    .comp-dim-name {
      font-weight: 700;
      color: var(--slate-dark);
      font-size: 0.95rem;
    }

    .comp-legacy {
      color: #64748B;
      font-size: 0.92rem;
      padding-right: 20px;
    }

    .comp-platform {
      color: #0F141C;
      font-weight: 600;
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .comp-platform::before {
      content: "✓";
      color: #00875A;
      font-weight: 900;
      background: rgba(0, 229, 153, 0.2);
      width: 20px;
      height: 20px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      font-size: 0.75rem;
    }

    /* 10. 资讯与行业标准演进 */
    .insights-section {
      background-color: #FFFFFF;
    }

    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
    }

    .insight-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(42, 84, 255, 0.4);
    }

    .insight-thumb {
      width: 100%;
      height: 190px;
      object-fit: cover;
    }

    .insight-content {
      padding: 26px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .insight-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.8rem;
      color: var(--text-sub);
      margin-bottom: 12px;
    }

    .insight-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--slate-dark);
      line-height: 1.45;
      margin-bottom: 12px;
    }

    .insight-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      flex-grow: 1;
    }

    .insight-action {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--accent-blue);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 11. 信任背书与权威机构口碑 */
    .endorsement-section {
      background-color: var(--bg-light);
    }

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .review-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 18px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background-color: var(--slate-dark);
      color: var(--primary-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      flex-shrink: 0;
    }

    .author-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--slate-dark);
      margin-bottom: 2px;
    }

    .author-info p {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    /* 12. 异议拆解与技术 FAQ */
    .faq-section {
      background-color: #FFFFFF;
    }

    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      background: #FAFBFD;
      overflow: hidden;
      transition: all var(--transition);
    }

    .faq-item[open] {
      background: #FFFFFF;
      border-color: rgba(42, 84, 255, 0.4);
      box-shadow: var(--shadow-sm);
    }

    .faq-summary {
      padding: 22px 28px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--slate-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      user-select: none;
    }

    .faq-summary::-webkit-details-marker {
      display: none;
    }

    .faq-summary::after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--text-sub);
      transition: transform var(--transition);
    }

    .faq-item[open] .faq-summary::after {
      content: "−";
      color: var(--accent-blue);
    }

    .faq-content {
      padding: 0 28px 24px 28px;
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.75;
      border-top: 1px solid transparent;
    }

    /* 13. 保障与服务交付承诺条 */
    .guarantee-bar {
      background-color: var(--slate-dark);
      color: #FFFFFF;
      padding: 50px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }

    .guarantee-box {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .guarantee-icon {
      font-size: 1.6rem;
      color: var(--primary-cyan);
      line-height: 1;
    }

    .guarantee-box h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: #FFFFFF;
    }

    .guarantee-box p {
      font-size: 0.82rem;
      color: #94A3B8;
      line-height: 1.5;
    }

    /* 底部固定转化条 */
    .sticky-cta-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 999;
      background: rgba(15, 20, 28, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding: 14px 0;
      transform: translateY(100%);
      transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .sticky-cta-bar.visible {
      transform: translateY(0);
    }

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

    .sticky-cta-text h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 2px;
    }

    .sticky-cta-text p {
      font-size: 0.82rem;
      color: #94A3B8;
    }

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

    .sticky-phone {
      color: var(--primary-cyan);
      font-size: 1rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 统一页脚 Footer */
    .site-footer {
      background-color: var(--bg-dark);
      color: #94A3B8;
      padding: 80px 0 30px 0;
      border-top: 1px solid var(--border-dark);
      padding-bottom: 90px; /* 留出底部吸底条空间 */
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.5fr 1fr;
      gap: 48px;
      margin-bottom: 60px;
    }

    .footer-brand h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 20px;
    }

    .footer-col h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
      letter-spacing: 0.02em;
    }

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

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

    .footer-links a {
      font-size: 0.88rem;
      color: #94A3B8;
    }

    .footer-links a:hover {
      color: var(--primary-cyan);
    }

    .footer-contact-item {
      font-size: 0.88rem;
      margin-bottom: 12px;
      line-height: 1.6;
      color: #94A3B8;
    }

    .footer-contact-item strong {
      color: #CBD5E1;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: #64748B;
    }

    .footer-bottom-links {
      display: flex;
      gap: 20px;
    }

    /* 移动端菜单与响应式断点 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background-color: var(--slate-dark);
      margin: 5px 0;
      transition: all var(--transition);
    }

    @media (max-width: 1024px) {
      .features-grid, .scenarios-grid, .insights-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .security-grid, .badges-flex, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .roadmap-timeline {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 24px;
      }
    }

    @media (max-width: 768px) {
      .header-topbar {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        display: none;
      }
      .main-nav.show {
        display: flex;
      }
      .header-actions .btn {
        display: none;
      }
      .features-grid, .scenarios-grid, .insights-grid, .reviews-grid,
      .security-grid, .check-grid, .badges-flex, .metrics-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .boundary-row {
        grid-template-columns: 1fr;
        gap: 10px;
      }
      .boundary-head {
        display: none;
      }
      .comp-grid-row {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .comp-grid-header {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
      }
      .sticky-cta-inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }