/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-dark: #059669;
      --accent: #F97316;
      --bg-dark: #0A0F1D;
      --bg-darker: #050811;
      --bg-slate: #0F172A;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --border-dark: #1E293B;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --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(0,0,0,0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-body);
      background-color: var(--bg-light);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px auto;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: rgba(16, 185, 129, 0.1);
      color: var(--primary-dark);
      font-size: 0.875rem;
      font-weight: 700;
      border-radius: 9999px;
      margin-bottom: 16px;
      letter-spacing: 0.05em;
    }
    .section-header h2 {
      font-size: 2.25rem;
      color: var(--text-main);
      font-weight: 800;
      letter-spacing: -0.025em;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-header p {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
    }
    /* Top Bar & Navigation */
    .top-bar {
      background: var(--bg-darker);
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-notice {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .top-bar-notice .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }
    .top-bar-contact {
      display: flex;
      gap: 20px;
    }
    .top-bar-contact span {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .main-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .nav-brand-icon {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary), #059669);
      color: #FFF;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 32px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-body);
      position: relative;
      padding: 8px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-dark);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: var(--transition);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: 9999px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
    }
    .btn-primary {
      background: var(--primary);
      color: #FFF;
      box-shadow: 0 4px 16px rgba(16, 185, 129, 0.35);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(16, 185, 129, 0.45);
    }
    .btn-accent {
      background: var(--accent);
      color: #FFF;
      box-shadow: 0 4px 16px rgba(249, 115, 22, 0.35);
    }
    .btn-accent:hover {
      background: #EA580C;
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: var(--border);
      background: #FFF;
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary-dark);
    }

    /* SECTION 1: HERO (Icon Matrix + Status Bar + Short Title) */
    .hero-matrix-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 64px 0 80px 0;
      border-bottom: 1px solid var(--border);
    }
    .hero-status-strip {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #FFFFFF;
      padding: 8px 20px;
      border-radius: 9999px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border);
      margin-bottom: 28px;
    }
    .status-pulse {
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--primary-dark);
      font-weight: 700;
      font-size: 0.875rem;
    }
    .pulse-ring {
      width: 10px;
      height: 10px;
      background: var(--primary);
      border-radius: 50%;
      position: relative;
    }
    .pulse-ring::before {
      content: '';
      position: absolute;
      top: -4px;
      left: -4px;
      right: -4px;
      bottom: -4px;
      border-radius: 50%;
      background: rgba(16, 185, 129, 0.4);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); opacity: 0.8; }
      50% { transform: scale(1.4); opacity: 0; }
      100% { transform: scale(0.95); opacity: 0; }
    }
    .status-metric-divider {
      width: 1px;
      height: 16px;
      background: var(--border);
    }
    .hero-heading-group {
      text-align: center;
      max-width: 960px;
      margin: 0 auto 48px auto;
    }
    .hero-heading-group h1 {
      font-size: 3.25rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.2;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
    }
    .hero-heading-group h1 span {
      background: linear-gradient(135deg, var(--primary-dark), #2563EB);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-heading-group p {
      font-size: 1.15rem;
      color: var(--text-body);
      line-height: 1.85;
      max-width: 820px;
      margin: 0 auto 32px auto;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-icon-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 56px;
    }
    .hero-matrix-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: flex-start;
      gap: 16px;
      transition: var(--transition);
    }
    .hero-matrix-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .matrix-card-icon {
      width: 48px;
      height: 48px;
      flex-shrink: 0;
      background: rgba(16, 185, 129, 0.1);
      color: var(--primary-dark);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
    }
    .matrix-card-content h3 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .matrix-card-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* SECTION 2: ENTRY MATRIX */
    .section-entries {
      padding: 96px 0;
      background: #FFFFFF;
    }
    .entry-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .entry-card {
      background: var(--bg-light);
      border-radius: var(--radius-xl);
      border: 1px solid var(--border);
      padding: 32px 24px;
      position: relative;
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .entry-card:hover {
      background: #FFFFFF;
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .entry-badge {
      position: absolute;
      top: 18px;
      right: 18px;
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.75rem;
      font-weight: 700;
      background: rgba(15, 23, 42, 0.06);
      color: var(--text-muted);
    }
    .entry-card-icon {
      width: 56px;
      height: 56px;
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }
    .entry-card h3 {
      font-size: 1.25rem;
      color: var(--text-main);
      font-weight: 800;
      margin-bottom: 12px;
    }
    .entry-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .entry-card-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--primary-dark);
    }

    /* SECTION 3: LATEST UPDATES & WORKOUT DISPATCH */
    .section-updates {
      padding: 96px 0;
      background: #F8FAFC;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .updates-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .updates-media {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border);
    }
    .updates-media img {
      width: 100%;
      height: 440px;
      object-fit: cover;
    }
    .updates-media-badge {
      position: absolute;
      bottom: 24px;
      left: 24px;
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(8px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      color: #FFF;
      border: 1px solid rgba(255,255,255,0.15);
    }
    .updates-media-badge .badge-title {
      font-size: 0.8125rem;
      color: var(--primary);
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .updates-media-badge .badge-val {
      font-size: 1.15rem;
      font-weight: 800;
      margin-top: 2px;
    }
    .update-feed {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .update-feed-item {
      background: #FFFFFF;
      padding: 22px 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      display: flex;
      gap: 18px;
      transition: var(--transition);
    }
    .update-feed-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
      box-shadow: var(--shadow-sm);
    }
    .feed-date {
      flex-shrink: 0;
      width: 64px;
      text-align: center;
      background: rgba(16, 185, 129, 0.08);
      border-radius: var(--radius-sm);
      padding: 8px 4px;
      height: fit-content;
    }
    .feed-date .date-day {
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--primary-dark);
      line-height: 1.1;
    }
    .feed-date .date-sub {
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    .feed-body h4 {
      font-size: 1.05rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 6px;
    }
    .feed-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* SECTION 4: FEATURED MATRIX (3 CORE PROGRAMS) */
    .section-matrix {
      padding: 104px 0;
      background: #FFFFFF;
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .matrix-program-card {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .matrix-program-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .matrix-thumb {
      position: relative;
      height: 220px;
      overflow: hidden;
    }
    .matrix-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .matrix-program-card:hover .matrix-thumb img {
      transform: scale(1.06);
    }
    .matrix-chip {
      position: absolute;
      top: 16px;
      left: 16px;
      background: rgba(15, 23, 42, 0.8);
      backdrop-filter: blur(6px);
      color: #FFF;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 6px 12px;
      border-radius: 9999px;
    }
    .matrix-content {
      padding: 30px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .matrix-content h3 {
      font-size: 1.35rem;
      color: var(--text-main);
      font-weight: 800;
      margin-bottom: 12px;
    }
    .matrix-content p {
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .matrix-meta-row {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border);
      padding-top: 18px;
      margin-bottom: 24px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .matrix-meta-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .matrix-meta-item strong {
      color: var(--text-main);
    }

    /* SECTION 5: DARK DEEP-DIVE (Biomechanics & AI Accuracy) */
    .section-dark-biomech {
      background: var(--bg-dark);
      color: #F8FAFC;
      padding: 104px 0;
      position: relative;
      overflow: hidden;
    }
    .dark-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 64px auto;
    }
    .dark-header h2 {
      font-size: 2.35rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .dark-header p {
      color: #94A3B8;
      font-size: 1.05rem;
      line-height: 1.8;
    }
    .dark-biomech-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .dark-tech-box {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-xl);
      padding: 36px 28px;
      transition: var(--transition);
    }
    .dark-tech-box:hover {
      background: rgba(255, 255, 255, 0.05);
      border-color: var(--primary);
      transform: translateY(-4px);
    }
    .tech-box-indicator {
      width: 48px;
      height: 48px;
      background: rgba(16, 185, 129, 0.15);
      color: var(--primary);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 22px;
    }
    .dark-tech-box h3 {
      font-size: 1.25rem;
      color: #FFF;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .dark-tech-box p {
      font-size: 0.9rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .tech-box-stat {
      border-top: 1px solid rgba(255,255,255,0.08);
      padding-top: 16px;
      display: flex;
      align-items: baseline;
      gap: 8px;
    }
    .stat-number {
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--primary);
    }
    .stat-label {
      font-size: 0.8rem;
      color: #64748B;
    }

    /* SECTION 6: METRICS DASHBOARD (4 Columns) */
    .section-metrics {
      padding: 80px 0;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border);
    }
    .metrics-dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }
    .metric-kpi-item {
      text-align: center;
      padding: 32px 20px;
      border-radius: var(--radius-xl);
      background: var(--bg-light);
      border: 1px solid var(--border);
      transition: var(--transition);
    }
    .metric-kpi-item:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .metric-kpi-value {
      font-size: 2.75rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.1;
      margin-bottom: 8px;
      letter-spacing: -0.03em;
    }
    .metric-kpi-value span {
      color: var(--primary);
      font-size: 1.75rem;
    }
    .metric-kpi-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .metric-kpi-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* SECTION 7: USER SUCCESS & DATA TRANSFORMATION */
    .section-transformation {
      padding: 96px 0;
      background: #F8FAFC;
    }
    .transformation-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 36px;
    }
    .transform-card {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .transform-card-header {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 24px;
    }
    .transform-avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: rgba(16, 185, 129, 0.15);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 800;
    }
    .transform-user-info h4 {
      font-size: 1.15rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 4px;
    }
    .transform-user-info span {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .transform-stats-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      background: var(--bg-light);
      padding: 18px;
      border-radius: var(--radius-md);
      margin-bottom: 20px;
      text-align: center;
    }
    .t-stat-label {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-bottom: 4px;
    }
    .t-stat-val {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
    }
    .transform-card p {
      font-size: 0.95rem;
      color: var(--text-body);
      line-height: 1.75;
      font-style: italic;
    }

    /* SECTION 8: USER REVIEWS & SOCIAL PROOF */
    .section-reviews {
      padding: 96px 0;
      background: #FFFFFF;
      border-top: 1px solid var(--border);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: var(--bg-light);
      border-radius: var(--radius-xl);
      border: 1px solid var(--border);
      padding: 32px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-card:hover {
      background: #FFFFFF;
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .review-stars {
      color: #F59E0B;
      font-size: 0.9rem;
      margin-bottom: 16px;
      display: flex;
      gap: 4px;
    }
    .review-card p {
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border);
      padding-top: 16px;
    }
    .review-author-meta h5 {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 700;
    }
    .review-author-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* SECTION 9: NEWS & KNOWLEDGE BASE */
    .section-news {
      padding: 96px 0;
      background: #F8FAFC;
      border-top: 1px solid var(--border);
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-xl);
      border: 1px solid var(--border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .news-card-img {
      height: 200px;
      overflow: hidden;
    }
    .news-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .news-card:hover .news-card-img img {
      transform: scale(1.05);
    }
    .news-card-body {
      padding: 28px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-cat {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary-dark);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 10px;
    }
    .news-card-body h3 {
      font-size: 1.15rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-card-body p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .news-card-footer {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.8rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border);
      padding-top: 14px;
    }

    /* SECTION 10: VERSION UPDATE TIMELINE */
    .section-versions {
      padding: 96px 0;
      background: #FFFFFF;
      border-top: 1px solid var(--border);
    }
    .version-timeline {
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      padding-left: 36px;
    }
    .version-timeline::before {
      content: '';
      position: absolute;
      left: 12px;
      top: 10px;
      bottom: 10px;
      width: 2px;
      background: var(--border);
    }
    .version-node {
      position: relative;
      margin-bottom: 42px;
    }
    .version-node:last-child {
      margin-bottom: 0;
    }
    .version-marker {
      position: absolute;
      left: -36px;
      top: 4px;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 4px solid var(--primary);
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.15);
    }
    .version-card {
      background: var(--bg-light);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 26px 30px;
    }
    .version-header-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
      flex-wrap: wrap;
      gap: 10px;
    }
    .version-tag-pill {
      background: var(--bg-slate);
      color: #FFFFFF;
      font-size: 0.8rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 9999px;
    }
    .version-date {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .version-card h4 {
      font-size: 1.15rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 8px;
    }
    .version-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* SECTION 11: MULTI-PLATFORM & APP CLIENT */
    .section-crossplatform {
      padding: 104px 0;
      background: linear-gradient(135deg, var(--bg-slate) 0%, var(--bg-darker) 100%);
      color: #FFFFFF;
      border-top: 1px solid var(--border-dark);
    }
    .platform-container-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .platform-text h2 {
      font-size: 2.35rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
    }
    .platform-text p {
      font-size: 1.05rem;
      color: #94A3B8;
      line-height: 1.85;
      margin-bottom: 36px;
    }
    .platform-feature-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 40px;
    }
    .platform-feature-item {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 0.95rem;
      color: #E2E8F0;
    }
    .platform-feature-item i {
      color: var(--primary);
      font-size: 1.1rem;
    }
    .platform-buttons-row {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .platform-preview-banner {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-xl);
      padding: 32px;
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }
    .platform-preview-banner img {
      border-radius: var(--radius-md);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    /* SECTION 12: FAQS */
    .section-faq {
      padding: 104px 0;
      background: #FFFFFF;
    }
    .faq-layout {
      max-width: 880px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      margin-bottom: 18px;
      overflow: hidden;
      background: var(--bg-light);
      transition: var(--transition);
    }
    .faq-item.active {
      background: #FFFFFF;
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-trigger {
      width: 100%;
      padding: 24px 28px;
      text-align: left;
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      background: transparent;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }
    .faq-trigger i {
      font-size: 1rem;
      color: var(--primary-dark);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-trigger i {
      transform: rotate(180deg);
    }
    .faq-panel {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      padding: 0 28px;
    }
    .faq-item.active .faq-panel {
      max-height: 280px;
      padding-bottom: 24px;
    }
    .faq-panel p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.8;
    }

    /* SECTION 13: CONVERSION FORM & DISPATCH */
    .section-conversion {
      padding: 96px 0;
      background: #F1F5F9;
      border-top: 1px solid var(--border);
    }
    .conversion-card-wrapper {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      border-radius: var(--radius-xl);
      padding: 56px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }
    .conversion-info h2 {
      font-size: 2.2rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .conversion-info p {
      font-size: 1rem;
      color: #94A3B8;
      line-height: 1.8;
      margin-bottom: 28px;
    }
    .conversion-badges-row {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .conversion-badge-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.875rem;
      color: #CBD5E1;
    }
    .conversion-badge-item i {
      color: var(--primary);
    }
    .conversion-form {
      background: #FFFFFF;
      padding: 36px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      color: var(--text-main);
    }
    .conversion-form h3 {
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .conversion-form p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 22px;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-body);
      margin-bottom: 8px;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      font-size: 0.9rem;
      color: var(--text-main);
      background: #F8FAFC;
      transition: var(--transition);
      outline: none;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }
    .form-submit-btn {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
      font-weight: 800;
      border-radius: var(--radius-sm);
      background: var(--primary);
      color: #FFFFFF;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      margin-top: 8px;
    }
    .form-submit-btn:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
    }

    /* FOOTER */
    .site-footer {
      background: var(--bg-darker);
      color: #94A3B8;
      padding: 80px 0 32px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 64px;
    }
    .footer-brand-title {
      font-size: 1.35rem;
      color: #FFFFFF;
      font-weight: 800;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-about {
      line-height: 1.8;
      margin-bottom: 20px;
      color: #64748B;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      color: #FFFFFF;
      font-weight: 700;
      margin-bottom: 22px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-links a:hover {
      color: var(--primary);
      padding-left: 4px;
    }
    .footer-contact-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
      color: #94A3B8;
      line-height: 1.6;
    }
    .footer-contact-item i {
      color: var(--primary);
      margin-top: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 32px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
      color: #64748B;
    }
    .footer-bottom-links {
      display: flex;
      gap: 24px;
    }
    .footer-bottom-links a:hover {
      color: #CBD5E1;
    }

    /* RESPONSIVE BREAKPOINTS */
    @media (max-width: 1024px) {
      .hero-icon-matrix {
        grid-template-columns: repeat(2, 1fr);
      }
      .entry-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .matrix-grid, .dark-biomech-grid, .news-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .platform-container-box, .conversion-card-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .top-bar-contact {
        display: none;
      }
      .hero-heading-group h1 {
        font-size: 2.25rem;
      }
      .section-header h2 {
        font-size: 1.85rem;
      }
      .hero-icon-matrix, .entry-grid, .matrix-grid, .dark-biomech-grid, .metrics-dashboard-grid, .transformation-grid, .reviews-grid, .news-grid {
        grid-template-columns: 1fr;
      }
      .updates-layout {
        grid-template-columns: 1fr;
      }
      .updates-media img {
        height: 280px;
      }
      .conversion-card-wrapper {
        padding: 32px 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }