/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-dark: #059669;
      --accent: #84CC16;
      --dark-slate: #0F172A;
      --bg-light: #F8FAFC;
      --card-bg: #FFFFFF;
      --border: #E2E8F0;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
      --shadow-lg: 0 20px 30px -10px rgba(15,23,42,0.12);
      --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", "Hiragino Sans GB", "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);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }
    ul, ol {
      list-style: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, select, textarea {
      font-family: inherit;
      outline: none;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    .section-wrap {
      padding: 5rem 0;
      position: relative;
    }
    .section-white {
      background-color: #FFFFFF;
    }
    .section-muted {
      background-color: #F8FAFC;
    }
    .section-dark {
      background-color: var(--dark-slate);
      color: #FFFFFF;
    }
    .section-head {
      margin-bottom: 3.5rem;
      text-align: center;
    }
    .section-head.left-aligned {
      text-align: left;
    }
    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: 9999px;
      background-color: rgba(16, 185, 129, 0.1);
      color: var(--primary-dark);
      font-size: 0.8125rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 0.85rem;
      border: 1px solid rgba(16, 185, 129, 0.2);
    }
    .badge-tag.badge-accent {
      background-color: rgba(132, 204, 22, 0.15);
      color: #4d7c0f;
      border-color: rgba(132, 204, 22, 0.3);
    }
    .badge-tag.badge-dark {
      background-color: rgba(255, 255, 255, 0.12);
      color: #84CC16;
      border-color: rgba(255, 255, 255, 0.2);
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto;
      line-height: 1.7;
    }
    .section-head.left-aligned .section-desc {
      margin-left: 0;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      min-width: 44px;
      padding: 0.75rem 1.65rem;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid transparent;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
    }
    .btn-outline {
      background-color: transparent;
      color: var(--text-main);
      border-color: var(--border);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: #FFFFFF;
      transform: translateY(-2px);
    }
    .btn-white {
      background-color: #FFFFFF;
      color: var(--dark-slate);
    }
    .btn-white:hover {
      background-color: #F1F5F9;
      color: var(--primary-dark);
      transform: translateY(-2px);
    }

    /* Top Bar */
    .top-bar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--border);
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 0.45rem 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--primary-dark);
      font-weight: 500;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 0 2px rgba(132, 204, 22, 0.35);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); opacity: 0.8; }
      50% { transform: scale(1.2); opacity: 1; }
      100% { transform: scale(0.95); opacity: 0.8; }
    }

    /* Header & Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--dark-slate);
      letter-spacing: -0.02em;
    }
    .brand-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 900;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 1.75rem;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-main);
      position: relative;
      padding: 0.35rem 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-dark);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--primary);
      border-radius: 2px;
    }
    .nav-cta-btn {
      margin-left: 0.5rem;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      cursor: pointer;
      color: var(--text-main);
      font-size: 1.25rem;
    }

    /* 1. Hero 板块 (会员俱乐部黑金质感 + 数据徽章) */
    .hero-section {
      background: linear-gradient(180deg, #09121F 0%, #0F172A 100%);
      color: #FFFFFF;
      padding: 4.5rem 0 5.5rem;
      position: relative;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      overflow: hidden;
    }
    .hero-bg-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.15) 0%, transparent 60%);
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 3.5rem;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero-content h1 {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin-bottom: 1.25rem;
      color: #FFFFFF;
    }
    .hero-content h1 span {
      background: linear-gradient(90deg, #10B981, #84CC16);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.0625rem;
      line-height: 1.75;
      color: #CBD5E1;
      margin-bottom: 2rem;
    }
    .hero-actions {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
      margin-bottom: 2.5rem;
    }
    .hero-badges-strip {
      display: flex;
      gap: 1.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
    }
    .badge-item {
      display: flex;
      flex-direction: column;
    }
    .badge-item strong {
      font-size: 1.35rem;
      font-weight: 700;
      color: #84CC16;
      font-family: "DIN Pro", Inter, sans-serif;
    }
    .badge-item span {
      font-size: 0.8125rem;
      color: #94A3B8;
    }
    .hero-visual-card {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 1.5rem;
      backdrop-filter: blur(12px);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }
    .visual-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1rem;
      padding-bottom: 0.75rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .visual-title {
      font-size: 0.9375rem;
      font-weight: 600;
      color: #F8FAFC;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .feed-preview-img {
      border-radius: var(--radius-md);
      overflow: hidden;
      margin-bottom: 1rem;
      position: relative;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }
    .feed-preview-img img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .visual-data-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0.75rem;
    }
    .data-pill {
      background: rgba(15, 23, 42, 0.6);
      padding: 0.65rem 0.75rem;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.05);
    }
    .data-pill-label {
      font-size: 0.6875rem;
      color: #94A3B8;
      display: block;
    }
    .data-pill-value {
      font-size: 1.125rem;
      font-weight: 700;
      color: #38BDF8;
      font-family: "DIN Pro", Inter, sans-serif;
    }

    /* 2. 多维指标看板 (#metrics) */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .metric-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2rem 1.5rem;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      position: relative;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .metric-val {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--dark-slate);
      line-height: 1.1;
      margin-bottom: 0.5rem;
      font-family: "DIN Pro", Inter, sans-serif;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .metric-val small {
      font-size: 1rem;
      font-weight: 600;
      color: var(--primary-dark);
    }
    .metric-title {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
    }
    .metric-summary {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 3. 网球教学服务矩阵 (#matrix) */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.85rem 1.5rem;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }
    .matrix-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }
    .matrix-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(16, 185, 129, 0.12);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .matrix-card h3 {
      font-size: 1.1875rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.75rem;
    }
    .matrix-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .matrix-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.35rem;
    }
    .matrix-tags span {
      background: #F1F5F9;
      color: #475569;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 500;
    }

    /* 4. 系统核心架构与产品介绍 (#features) */
    .features-split {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 3.5rem;
      align-items: center;
    }
    .feature-item {
      display: flex;
      gap: 1.25rem;
      margin-bottom: 2rem;
    }
    .feature-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9375rem;
      flex-shrink: 0;
    }
    .feature-text h3 {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.35rem;
    }
    .feature-text p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .feature-photo-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
    }
    .feature-photo-wrap img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }

    /* 5. 核心优势 6 卡片 (#advantages) */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .adv-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(16, 185, 129, 0.4);
    }
    .adv-card h3 {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.65rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .adv-card h3::before {
      content: "";
      width: 4px;
      height: 16px;
      background: var(--primary);
      border-radius: 2px;
      display: inline-block;
    }
    .adv-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 6. 热门软件/硬件组合配置 (#hardware) */
    .hardware-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .hw-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 2.25rem 1.75rem;
      display: flex;
      flex-direction: column;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .hw-card.recommended {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-md);
    }
    .hw-badge-top {
      position: absolute;
      top: -12px;
      right: 24px;
      background: linear-gradient(90deg, #10B981, #059669);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 9999px;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    }
    .hw-tag {
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--primary-dark);
      text-transform: uppercase;
      margin-bottom: 0.5rem;
    }
    .hw-card h3 {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 0.75rem;
    }
    .hw-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.5rem;
    }
    .hw-list {
      margin-bottom: 2rem;
      flex-grow: 1;
    }
    .hw-list li {
      font-size: 0.875rem;
      color: var(--text-main);
      margin-bottom: 0.65rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hw-list li::before {
      content: "✓";
      color: var(--primary);
      font-weight: 700;
    }

    /* 7. 教学结果对比 (#comparison) */
    .comparison-table-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
      margin-top: 1rem;
    }
    .comp-col {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2.25rem 2rem;
    }
    .comp-col.highlighted {
      background: #FFFFFF;
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-md);
    }
    .comp-col-header {
      padding-bottom: 1.25rem;
      margin-bottom: 1.5rem;
      border-bottom: 1px solid var(--border);
    }
    .comp-col-header h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 0.35rem;
    }
    .comp-col.highlighted .comp-col-header h3 {
      color:var(--primary-dark);
    }
    .comp-col-header p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }
    .comp-item {
      margin-bottom: 1.25rem;
    }
    .comp-label {
      font-size: 0.8125rem;
      font-weight: 700;
      color: #64748B;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 0.25rem;
    }
    .comp-desc {
      font-size: 0.9375rem;
      line-height: 1.55;
    }
    .comp-col.highlighted .comp-desc {
      color: var(--text-main);
      font-weight: 500;
    }

    /* 8. 技术演进与版本里程碑 (#milestones) */
    .timeline-wrap {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
      margin-top: 2rem;
    }
    .timeline-wrap::before {
      content: "";
      position: absolute;
      top: 20px;
      left: 10%;
      right: 10%;
      height: 2px;
      background: #CBD5E1;
      z-index: 1;
    }
    .timeline-step {
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 0 0.5rem;
    }
    .step-dot {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 3px solid var(--primary);
      margin: 0 auto 1.25rem;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.875rem;
      color: var(--primary-dark);
      box-shadow: 0 0 0 6px #F8FAFC;
    }
    .timeline-step.active .step-dot {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.2);
    }
    .step-time {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 0.35rem;
      text-transform: uppercase;
    }
    .step-title {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
    }
    .step-desc {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 9. 深色研发理念区 (#philosophy) */
    .philosophy-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .philosophy-left h2 {
      font-size: 2.25rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 1.25rem;
      color: #FFFFFF;
    }
    .philosophy-left p {
      font-size: 1rem;
      line-height: 1.8;
      color: #94A3B8;
      margin-bottom: 1.5rem;
    }
    .philosophy-stat-card {
      background: rgba(30, 41, 59, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 2.25rem;
    }
    .stat-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .stat-row:last-child {
      border-bottom: none;
    }
    .stat-row-label {
      font-size: 0.9375rem;
      color: #CBD5E1;
    }
    .stat-row-val {
      font-size: 1.25rem;
      font-weight: 700;
      color: #84CC16;
      font-family: "DIN Pro", Inter, sans-serif;
    }

    /* 10. 用户实操故事 (#stories) */
    .stories-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .story-img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .story-body {
      padding: 1.75rem 1.5rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .story-role {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary-dark);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 0.35rem;
    }
    .story-title {
      font-size: 1.125rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }
    .story-text {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .story-metric-tag {
      background: #ECFDF5;
      color: #065F46;
      font-size: 0.8125rem;
      font-weight: 600;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
      border: 1px solid #A7F3D0;
    }

    /* 11. 权威评价 (#reviews) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2rem 1.75rem;
      box-shadow: var(--shadow-sm);
    }
    .review-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 1rem;
      letter-spacing: 2px;
    }
    .review-quote {
      font-size: 0.9375rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 1.5rem;
      font-style: italic;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-info h4 {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-info p {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 12. 训练资讯 (#news) */
    .news-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 2rem;
      align-items: stretch;
    }
    .news-featured {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .news-featured img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .news-featured-content {
      padding: 1.75rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-featured-content h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.75rem;
    }
    .news-featured-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .news-list-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      transition: all 0.2s ease;
      display: block;
    }
    .news-list-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }
    .news-list-date {
      font-size: 0.75rem;
      color: var(--primary-dark);
      font-weight: 600;
      margin-bottom: 0.25rem;
    }
    .news-list-title {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.4;
      margin-bottom: 0.35rem;
    }
    .news-list-desc {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 13. 平台合规与技术保障 (#guarantee) */
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .guarantee-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.75rem 1.25rem;
      text-align: center;
    }
    .guarantee-icon {
      width: 48px;
      height: 48px;
      margin: 0 auto 1rem;
      background: rgba(16, 185, 129, 0.1);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-size: 1.25rem;
      font-weight: 800;
    }
    .guarantee-card h3 {
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 0.5rem;
    }
    .guarantee-card p {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 14. 常见问答 FAQ (#faq) */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 1rem;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-item:focus-within, .faq-item:hover {
      border-color: var(--primary);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 1.25rem 1.5rem;
      font-size: 1.0625rem;
      font-weight: 700;
      color: var(--text-main);
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-toggle-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.25s ease;
      font-weight: 400;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 1.5rem;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .faq-item.active .faq-answer {
      max-height: 240px;
      padding-bottom: 1.25rem;
    }

    /* 预约演示收口表单 (#cta) */
    .cta-banner {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 3rem;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }
    .cta-content h2 {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1rem;
      color: #FFFFFF;
    }
    .cta-content p {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 1.75rem;
    }
    .cta-form {
      background: #FFFFFF;
      padding: 2rem;
      border-radius: var(--radius-md);
      color: var(--text-main);
    }
    .cta-form .form-group {
      margin-bottom: 1.15rem;
    }
    .cta-form label {
      display: block;
      font-size: 0.8125rem;
      font-weight: 600;
      color: #475569;
      margin-bottom: 0.35rem;
    }
    .cta-form input, .cta-form select {
      width: 100%;
      height: 44px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 0 0.85rem;
      font-size: 0.875rem;
      color: var(--text-main);
      background-color: #F8FAFC;
      transition: border-color 0.2s ease;
    }
    .cta-form input:focus, .cta-form select:focus {
      border-color: var(--primary);
      background-color: #FFFFFF;
    }
    .cta-form .btn-submit {
      width: 100%;
      margin-top: 0.5rem;
    }

    /* 全局页脚 Footer */
    .footer {
      background-color: #0B1120;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 1fr 0.8fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      color: #FFFFFF;
      margin-bottom: 1rem;
    }
    .footer-desc {
      line-height: 1.7;
      margin-bottom: 1.25rem;
      color: #64748B;
    }
    .footer-col h4 {
      color: #F8FAFC;
      font-size: 0.9375rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
      letter-spacing: 0.02em;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-contact-item {
      margin-bottom: 0.65rem;
      line-height: 1.6;
    }
    .footer-contact-item strong {
      color: #E2E8F0;
    }
    .footer-bottom {
      padding-top: 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .features-split, .philosophy-grid, .news-grid, .cta-banner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .metrics-grid, .matrix-grid, .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-wrap {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
      }
      .timeline-wrap::before {
        display: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 1.5rem 2rem;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border);
        align-items: flex-start;
        gap: 1rem;
      }
      .nav-menu.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-content h1 {
        font-size: 2.15rem;
      }
      .advantages-grid, .hardware-grid, .comparison-table-wrap, .stories-grid, .reviews-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
      }
    }
    @media (max-width: 520px) {
      .metrics-grid, .matrix-grid, .guarantee-grid, .timeline-wrap, .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap {
        padding: 3.5rem 0;
      }
      .cta-banner {
        padding: 2rem 1.25rem;
      }
      .hero-badges-strip {
        flex-direction: column;
        gap: 0.75rem;
      }
    }