/* roulang page: index */
:root {
      --primary: #1D4ED8;
      --primary-hover: #1E40AF;
      --secondary: #0284C7;
      --accent: #F97316;
      --accent-hover: #EA580C;
      --dark: #0F172A;
      --dark-card: #1E293B;
      --bg: #F8FAFC;
      --white: #FFFFFF;
      --text: #334155;
      --text-heading: #0F172A;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --border-dark: #334155;
      --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 12px 24px -4px rgba(29, 78, 216, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
      --radius: 12px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      outline: none;
      transition: var(--transition);
    }

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

    /* 顶部提示条 */
    .top-bar {
      background-color: var(--dark);
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

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

    .ticker-tag {
      background-color: rgba(249, 115, 22, 0.2);
      color: var(--accent);
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
      margin-right: 8px;
      display: inline-block;
    }

    /* 主导航 */
    .header-main {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      position: sticky;
      top: 0;
      z-index: 999;
      border-bottom: 1px solid var(--border);
    }

    .nav-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-heading);
      letter-spacing: -0.5px;
    }

    .brand-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--white);
      font-weight: 900;
      font-size: 1.1rem;
      box-shadow: 0 4px 10px rgba(29, 78, 216, 0.3);
    }

    .nav-links {
      display: flex;
      list-style: none;
      gap: 32px;
      align-items: center;
    }

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

    .nav-item a:hover {
      color: var(--primary);
    }

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

    .nav-item a:hover::after {
      width: 100%;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9375rem;
      gap: 8px;
      text-decoration: none;
      transition: var(--transition);
    }

    .btn-primary {
      background-color: var(--primary);
      color: var(--white);
      box-shadow: 0 4px 12px rgba(29, 78, 216, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(29, 78, 216, 0.35);
      color: var(--white);
    }

    .btn-secondary {
      background-color: var(--white);
      color: var(--text-heading);
      border: 1px solid var(--border);
    }

    .btn-secondary:hover {
      background-color: #F1F5F9;
      border-color: #CBD5E1;
    }

    .btn-accent {
      background-color: var(--accent);
      color: var(--white);
    }

    .btn-accent:hover {
      background-color: var(--accent-hover);
    }

    /* Section 通用布局 */
    .section-py {
      padding-top: 88px;
      padding-bottom: 88px;
    }

    .section-py-sm {
      padding-top: 60px;
      padding-bottom: 60px;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 56px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background-color: #EFF6FF;
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 14px;
      border: 1px solid #DBEAFE;
    }

    .section-tag.dark {
      background-color: rgba(2, 132, 199, 0.2);
      color: #38BDF8;
      border-color: rgba(56, 189, 248, 0.3);
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 16px;
      line-height: 1.3;
    }

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

    /* 1. Hero 板块 (API / 开发者控制台形态) */
    .hero-section {
      position: relative;
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 96px 0 108px 0;
      overflow: hidden;
      border-bottom: 1px solid var(--border);
    }

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

    .hero-content h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--text-heading);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-content h1 span {
      background: linear-gradient(120deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-p {
      font-size: 1.125rem;
      color: var(--text);
      line-height: 1.8;
      margin-bottom: 32px;
    }

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

    .hero-badges {
      display: flex;
      align-items: center;
      gap: 24px;
      font-size: 0.875rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border);
      padding-top: 24px;
    }

    .badge-item {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .badge-icon {
      color: var(--primary);
      font-weight: bold;
    }

    /* 控制台代码示意卡片 */
    .console-mockup {
      background-color: var(--dark);
      border-radius: var(--radius);
      box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.4);
      border: 1px solid var(--border-dark);
      overflow: hidden;
    }

    .console-head {
      background-color: #1E293B;
      padding: 12px 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .window-dots {
      display: flex;
      gap: 6px;
    }

    .dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dot-red { background: #EF4444; }
    .dot-yellow { background: #F59E0B; }
    .dot-green { background: #10B981; }

    .console-title {
      font-size: 0.75rem;
      font-family: monospace;
      color: #94A3B8;
    }

    .console-body {
      padding: 24px;
      color: #E2E8F0;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.875rem;
      line-height: 1.6;
      background: #0B1120;
    }

    .code-line { margin-bottom: 4px; }
    .code-keyword { color: #F472B6; }
    .code-func { color: #38BDF8; }
    .code-str { color: #A7F3D0; }
    .code-num { color: #FBBF24; }
    .code-comment { color: #64748B; font-style: italic; }

    /* 2. 优惠阶梯与权益区 */
    .tier-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .tier-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px 28px;
      position: relative;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

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

    .tier-card.featured {
      border-color: var(--primary);
      box-shadow: 0 10px 25px -5px rgba(29, 78, 216, 0.15);
    }

    .tier-ribbon {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: var(--white);
      padding: 4px 12px;
      font-size: 0.75rem;
      font-weight: 700;
      border-radius: 20px;
    }

    .tier-level {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 8px;
    }

    .tier-price {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--text-heading);
      margin-bottom: 12px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }

    .tier-price span {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    .tier-desc {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 48px;
    }

    .tier-features {
      list-style: none;
      border-top: 1px solid var(--border);
      padding-top: 20px;
      margin-bottom: 28px;
    }

    .tier-features li {
      font-size: 0.875rem;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .tier-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }

    /* 3. 套餐对比矩阵 */
    .compare-section {
      background: #FFFFFF;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .compare-table-wrapper {
      overflow-x: auto;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9375rem;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border);
    }

    .compare-table thead th {
      background-color: #F8FAFC;
      color: var(--text-heading);
      font-weight: 700;
    }

    .compare-table tbody tr:hover {
      background-color: #F8FAFC;
    }

    .tag-status-yes {
      color: #059669;
      font-weight: 700;
    }

    .tag-status-no {
      color: #94A3B8;
    }

    /* 4. 限时接入入口 */
    .event-banner {
      background: linear-gradient(135deg, #1E3A8A 0%, #1D4ED8 50%, #0284C7 100%);
      border-radius: var(--radius);
      padding: 48px 40px;
      color: var(--white);
      display: flex;
      justify-content: space-between;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }

    .event-banner-content h3 {
      font-size: 1.875rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .event-banner-content p {
      font-size: 1.0625rem;
      color: #E0E7FF;
      max-width: 680px;
    }

    /* 5. 爆款赛事资讯与内容清单 */
    .hot-list-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .hot-item-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .hot-img-wrap {
      position: relative;
      height: 190px;
      overflow: hidden;
    }

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

    .hot-item-card:hover .hot-img-wrap img {
      transform: scale(1.05);
    }

    .hot-category-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 23, 42, 0.75);
      backdrop-filter: blur(4px);
      color: var(--white);
      font-size: 0.75rem;
      padding: 4px 10px;
      border-radius: 4px;
      font-weight: 600;
    }

    .hot-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .hot-body h4 {
      font-size: 1.1875rem;
      color: var(--text-heading);
      margin-bottom: 10px;
      line-height: 1.4;
    }

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

    .hot-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 14px;
      border-top: 1px solid #F1F5F9;
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    /* 6. 核心优势六宫格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .feature-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
      border-color: #BFDBFE;
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      background-color: #EFF6FF;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.25rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

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

    .feature-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 7. 深色全球节点与架构体系 */
    .network-dark-section {
      background-color: var(--dark);
      color: #E2E8F0;
      position: relative;
    }

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

    .network-content h2 {
      color: var(--white);
      font-size: 2.25rem;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .network-content p {
      color: #94A3B8;
      font-size: 1rem;
      line-height: 1.8;
      margin-bottom: 28px;
    }

    .node-stat-boxes {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .node-box {
      background: var(--dark-card);
      border: 1px solid var(--border-dark);
      padding: 16px;
      border-radius: 8px;
    }

    .node-box-val {
      font-size: 1.5rem;
      font-weight: 800;
      color: #38BDF8;
      margin-bottom: 4px;
    }

    .node-box-lbl {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    .network-visual-card {
      background: var(--dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 0 20px 30px rgba(0, 0, 0, 0.4);
    }

    .network-visual-card img {
      width: 100%;
      height: 320px;
      object-fit: cover;
    }

    /* 8. 场景演示交替图文 */
    .scenario-item {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 64px;
    }

    .scenario-item:last-child {
      margin-bottom: 0;
    }

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

    .scenario-item.reverse .scenario-text {
      direction: ltr;
    }

    .scenario-media {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border);
    }

    .scenario-media img {
      width: 100%;
      height: 300px;
      object-fit: cover;
    }

    .scenario-text h3 {
      font-size: 1.625rem;
      color: var(--text-heading);
      margin-bottom: 16px;
    }

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

    .scenario-points {
      list-style: none;
    }

    .scenario-points li {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scenario-points li::before {
      content: "•";
      color: var(--secondary);
      font-size: 1.25rem;
    }

    /* 9. 客户案例与结果证明 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .case-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .case-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border);
      padding-bottom: 16px;
    }

    .case-client-title {
      font-weight: 700;
      color: var(--text-heading);
      font-size: 1.125rem;
    }

    .case-tag {
      background: #EFF6FF;
      color: var(--primary);
      padding: 2px 10px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 600;
    }

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

    .case-metrics-row {
      display: flex;
      gap: 24px;
      background: #F8FAFC;
      padding: 16px;
      border-radius: 8px;
    }

    .metric-col-val {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
    }

    .metric-col-lbl {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 10. 信任数据条 Metrics Bar */
    .metrics-bar {
      background: #FFFFFF;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .metric-item {
      padding: 12px;
    }

    .metric-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -1px;
    }

    .metric-label {
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 4px;
    }

    .metric-sub {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 11. 评价墙 (Social Proof) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .review-card {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #F59E0B;
      font-size: 0.875rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }

    .review-text {
      font-size: 0.9375rem;
      color: var(--text);
      line-height: 1.7;
      margin-bottom: 20px;
    }

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

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 0.875rem;
    }

    .reviewer-meta h5 {
      font-size: 0.875rem;
      color: var(--text-heading);
    }

    .reviewer-meta span {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 12. 保障图标条 */
    .guarantee-bar {
      background: #EFF6FF;
      border: 1px solid #DBEAFE;
      border-radius: var(--radius);
      padding: 32px;
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .guarantee-icon {
      font-size: 1.75rem;
      color: var(--primary);
      line-height: 1;
    }

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

    .guarantee-item p {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 13. FAQ 原生手风琴 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--white);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      margin-bottom: 16px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #CBD5E1;
    }

    .faq-trigger {
      width: 100%;
      text-align: left;
      background: none;
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.0625rem;
      font-weight: 600;
      color: var(--text-heading);
    }

    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

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

    .faq-body {
      padding: 0 24px 20px 24px;
      font-size: 0.9375rem;
      color: var(--text);
      line-height: 1.75;
      display: none;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

    .faq-item.active .faq-body {
      display: block;
    }

    /* 14. 底部行动转化区 */
    .cta-final-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      border-top: 1px solid var(--border);
    }

    .cta-box {
      background: var(--dark);
      border-radius: 16px;
      padding: 56px 48px;
      text-align: center;
      color: var(--white);
      box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.3);
      position: relative;
      overflow: hidden;
    }

    .cta-box h2 {
      font-size: 2.25rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .cta-box p {
      font-size: 1.0625rem;
      color: #94A3B8;
      max-width: 640px;
      margin: 0 auto 32px auto;
    }

    .cta-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 15. 页脚 Footer */
    .footer-main {
      background-color: #0B1120;
      color: #94A3B8;
      font-size: 0.875rem;
      padding: 72px 0 32px 0;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }

    .footer-col h5 {
      color: var(--white);
      font-size: 1rem;
      margin-bottom: 20px;
      font-weight: 700;
    }

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

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

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

    .footer-links a:hover {
      color: var(--white);
      text-decoration: underline;
    }

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

    /* 16. 底部常驻固定转化浮条 Sticky Bar */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(15, 23, 42, 0.96);
      backdrop-filter: blur(8px);
      color: var(--white);
      z-index: 990;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding: 12px 0;
      box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.2);
    }

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

    .sticky-notice {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.875rem;
    }

    .sticky-live-pill {
      background: var(--accent);
      color: var(--white);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { opacity: 1; }
      50% { opacity: 0.6; }
      100% { opacity: 1; }
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .tier-grid, .features-grid, .hot-list-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .network-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .hero-content h1 {
        font-size: 2.25rem;
      }
      .tier-grid, .features-grid, .hot-list-grid, .reviews-grid, .case-grid, .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .scenario-item, .scenario-item.reverse {
        grid-template-columns: 1fr;
      }
      .event-banner {
        flex-direction: column;
        text-align: center;
        gap: 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .sticky-notice {
        display: none;
      }
      .sticky-bar-flex {
        justify-content: center;
        width: 100%;
      }
      .sticky-bar-flex .btn {
        width: 100%;
      }
    }