/* roulang page: index */
:root {
      --bg-primary: #08090F;
      --bg-secondary: #0D111E;
      --bg-card: rgba(13, 17, 30, 0.85);
      --bg-card-solid: #111827;
      --accent-cyan: #00F0FF;
      --accent-blue: #0052FF;
      --accent-purple: #7B2FF7;
      --text-primary: #FFFFFF;
      --text-secondary: #CBD5E1;
      --text-muted: #94A3B8;
      --border-color: rgba(0, 240, 255, 0.18);
      --border-glow: rgba(0, 240, 255, 0.45);
      --radius-sm: 14px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
      --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.55);
      --shadow-glow: 0 0 16px rgba(0, 240, 255, 0.35);
      --shadow-glow-strong: 0 0 28px rgba(0, 240, 255, 0.55);
      --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
      --font-display: 'Inter', 'Segoe UI', system-ui, sans-serif;
      --transition-fast: 0.18s ease;
      --transition-smooth: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      background-image: radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

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

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

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    h1, h2, h3, .display-heading {
      font-family: var(--font-display);
      font-weight: 700;
      letter-spacing: -0.01em;
    }

    /* HEADER / NAV */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(8, 9, 15, 0.78);
      backdrop-filter: blur(18px) saturate(140%);
      -webkit-backdrop-filter: blur(18px) saturate(140%);
      border-bottom: 1px solid var(--border-color);
      transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
    }

    .site-header.scrolled {
      background: rgba(8, 9, 15, 0.92);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
    }

    .brand-icon {
      width: 36px;
      height: 36px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: #fff;
      flex-shrink: 0;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2px;
      list-style: none;
      flex-wrap: wrap;
    }

    .nav-links a {
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: all var(--transition-smooth);
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
      background: rgba(0, 240, 255, 0.08);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.18);
    }

    .nav-auth {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-login {
      padding: 8px 20px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-primary);
      background: transparent;
      border: 1px solid var(--border-glow);
      transition: all var(--transition-smooth);
    }

    .btn-login:hover {
      background: rgba(0, 240, 255, 0.08);
      box-shadow: var(--shadow-glow);
    }

    .btn-signup {
      padding: 8px 22px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 0.9rem;
      background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
      color: #000;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
    }

    .btn-signup:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.6rem;
      padding: 6px;
      line-height: 1;
    }

    @media (max-width: 1024px) {
      .nav-links {
        gap: 0;
      }
      .nav-links a {
        padding: 6px 13px;
        font-size: 0.88rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: rgba(8, 9, 15, 0.96);
        backdrop-filter: blur(20px);
        padding: 16px 20px;
        gap: 8px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.open {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .nav-auth {
        gap: 8px;
      }
      .btn-login,
      .btn-signup {
        padding: 6px 16px;
        font-size: 0.82rem;
      }
    }

    /* HERO */
    .hero-section {
      padding-top: 120px;
      padding-bottom: 60px;
      position: relative;
      overflow: hidden;
    }

    .hero-bg-img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 0;
      opacity: 0.22;
      pointer-events: none;
    }

    .hero-grid {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 44px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid var(--border-color);
      padding: 6px 18px;
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      color: var(--accent-cyan);
      margin-bottom: 20px;
      font-weight: 600;
    }

    .hero-title {
      font-size: clamp(2.4rem, 5.5vw, 3.5rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 18px;
    }

    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-secondary);
      max-width: 520px;
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .btn-primary {
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 1rem;
      background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
      color: #000;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-primary:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-2px);
    }

    .btn-outline {
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 1rem;
      border: 1.5px solid var(--border-glow);
      color: #fff;
      background: transparent;
      transition: all var(--transition-smooth);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-outline:hover {
      background: rgba(0, 240, 255, 0.06);
      box-shadow: var(--shadow-glow);
    }

    .hero-visual {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .hero-phone-mock {
      width: 280px;
      max-width: 100%;
      background: var(--bg-card-solid);
      border: 1.5px solid var(--border-color);
      border-radius: 38px;
      padding: 14px;
      box-shadow: 0 20px 60px rgba(0, 240, 255, 0.14);
      aspect-ratio: 9/16;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    .hero-phone-mock img {
      border-radius: 24px;
      object-fit: cover;
      width: 100%;
      height: 100%;
    }

    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-desc {
        margin-left: auto;
        margin-right: auto;
      }
      .hero-actions {
        justify-content: center;
      }
      .hero-phone-mock {
        width: 220px;
        margin: 0 auto;
      }
    }

    /* PROGRESS BAR SECTION */
    .progress-section {
      padding: 48px 0;
    }

    .progress-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 36px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 28px;
      justify-content: space-between;
    }

    .progress-info h3 {
      font-size: 1.4rem;
      font-weight: 700;
    }

    .progress-bar-wrap {
      flex: 1;
      min-width: 200px;
    }

    .progress-bar-label {
      display: flex;
      justify-content: space-between;
      margin-bottom: 8px;
      font-size: 0.9rem;
      color: var(--text-secondary);
    }

    .progress-bar {
      height: 14px;
      background: rgba(255,255,255,0.08);
      border-radius: var(--radius-full);
      overflow: hidden;
    }

    .progress-fill {
      width: 76%;
      height: 100%;
      background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
      border-radius: var(--radius-full);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
    }

    /* REWARD TIERS */
    .tiers-section {
      padding: 48px 0;
    }

    .section-label {
      font-size: 0.82rem;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--accent-cyan);
      font-weight: 700;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: clamp(1.8rem, 3.6vw, 2.3rem);
      font-weight: 800;
      margin-bottom: 14px;
    }

    .section-desc {
      color: var(--text-secondary);
      max-width: 680px;
      margin-bottom: 36px;
    }

    .tiers-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 22px;
    }

    .tier-card {
      background: var(--bg-card);
      backdrop-filter: blur(10px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: all var(--transition-smooth);
    }

    .tier-card:hover {
      border-color: var(--accent-cyan);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }

    .tier-card.popular {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
    }

    .tier-icon {
      font-size: 2rem;
      margin-bottom: 14px;
    }

    .tier-card h3 {
      font-size: 1.3rem;
      margin-bottom: 6px;
    }

    .tier-price {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--accent-cyan);
      margin-bottom: 14px;
    }

    .tier-features {
      list-style: none;
      padding: 0;
      margin-bottom: 20px;
    }

    .tier-features li {
      padding: 6px 0;
      color: var(--text-secondary);
      font-size: 0.95rem;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    /* SUPPORTERS WALL */
    .supporters-section {
      padding: 48px 0;
    }

    .supporters-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
      gap: 16px;
    }

    .supporter-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 18px 14px;
      text-align: center;
      transition: all var(--transition-fast);
    }

    .supporter-item:hover {
      border-color: var(--accent-cyan);
    }

    .supporter-avatar {
      width: 54px;
      height: 54px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      margin: 0 auto 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.2rem;
    }

    .supporter-item h4 {
      font-size: 0.95rem;
      font-weight: 600;
    }

    .supporter-item span {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    /* NEWS SECTION */
    .news-section {
      padding: 48px 0;
    }

    .news-list {
      display: grid;
      grid-template-columns: 1fr;
      gap: 12px;
    }

    .news-item {
      display: flex;
      gap: 16px;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.06);
      align-items: flex-start;
    }

    .news-item:last-child {
      border-bottom: none;
    }

    .news-date {
      font-size: 0.8rem;
      color: var(--accent-cyan);
      font-weight: 600;
      white-space: nowrap;
      min-width: 70px;
      margin-top: 2px;
    }

    .news-item h4 {
      font-size: 1.05rem;
      font-weight: 600;
      line-height: 1.4;
    }

    .news-item a:hover h4 {
      color: var(--accent-cyan);
    }

    @media (min-width: 768px) {
      .news-list {
        grid-template-columns: 1fr 1fr;
      }
    }

    /* SUPPORT CTA */
    .support-cta-section {
      padding: 52px 0;
    }

    .cta-card {
      background: linear-gradient(135deg, rgba(0,82,255,0.2) 0%, rgba(0,240,255,0.1) 100%);
      border: 1.5px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 44px 36px;
      text-align: center;
    }

    .cta-card h2 {
      font-size: 2rem;
      margin-bottom: 12px;
    }

    /* FAQ */
    .faq-section {
      padding: 48px 0;
    }

    .faq-grid {
      display: grid;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 24px;
      transition: var(--transition-smooth);
    }

    .faq-item:hover {
      border-color: var(--accent-cyan);
    }

    .faq-item h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

    .faq-item p {
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    /* FOOTER */
    .site-footer {
      margin-top: auto;
      padding: 44px 0 28px;
      border-top: 1px solid var(--border-color);
      background: var(--bg-secondary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 32px;
      margin-bottom: 28px;
    }

    .footer-col h4 {
      font-size: 1rem;
      margin-bottom: 12px;
      color: var(--accent-cyan);
    }

    .footer-col a {
      display: block;
      padding: 4px 0;
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    .footer-col a:hover {
      color: #fff;
    }

    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* FAB */
    .fab {
      position: fixed;
      left: 20px;
      bottom: 28px;
      z-index: 60;
      width: 54px;
      height: 54px;
      border-radius: 50%;
      background: rgba(8,9,15,0.85);
      backdrop-filter: blur(12px);
      border: 2px solid var(--border-glow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      box-shadow: 0 0 18px rgba(0,240,255,0.45);
      transition: all var(--transition-smooth);
      animation: fabPulse 2.2s infinite;
    }

    .fab:hover {
      box-shadow: 0 0 32px rgba(0,240,255,0.75);
      transform: scale(1.08);
    }

    @keyframes fabPulse {
      0%, 100% { opacity: 0.9; }
      50% { opacity: 1; }
    }

    @media (max-width: 520px) {
      .fab {
        left: 14px;
        bottom: 20px;
        width: 48px;
        height: 48px;
      }
    }

/* roulang page: article */
:root {
      --bg-primary: #08090F;
      --bg-secondary: #0D111E;
      --bg-card: rgba(13, 17, 30, 0.85);
      --bg-card-solid: #111827;
      --accent-cyan: #00F0FF;
      --accent-blue: #0052FF;
      --accent-purple: #7B2FF7;
      --text-primary: #FFFFFF;
      --text-secondary: #CBD5E1;
      --text-muted: #94A3B8;
      --border-color: rgba(0, 240, 255, 0.18);
      --border-glow: rgba(0, 240, 255, 0.45);
      --radius-sm: 14px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
      --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.55);
      --shadow-glow: 0 0 16px rgba(0, 240, 255, 0.35);
      --shadow-glow-strong: 0 0 28px rgba(0, 240, 255, 0.55);
      --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
      --font-display: 'Inter', 'Segoe UI', system-ui, sans-serif;
      --transition-fast: 0.18s ease;
      --transition-smooth: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      background-image: radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

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

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

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    h1, h2, h3, h4, .display-heading {
      font-family: var(--font-display);
      font-weight: 700;
      letter-spacing: -0.01em;
    }

    /* HEADER / NAV */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(8, 9, 15, 0.78);
      backdrop-filter: blur(18px) saturate(140%);
      -webkit-backdrop-filter: blur(18px) saturate(140%);
      border-bottom: 1px solid var(--border-color);
      transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
    }

    .site-header.scrolled {
      background: rgba(8, 9, 15, 0.92);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
    }

    .brand-icon {
      width: 36px;
      height: 36px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: #fff;
      flex-shrink: 0;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2px;
      list-style: none;
      flex-wrap: wrap;
    }

    .nav-links a {
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: all var(--transition-smooth);
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
      background: rgba(0, 240, 255, 0.08);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.18);
    }

    .nav-auth {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-login {
      padding: 8px 20px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-primary);
      background: transparent;
      border: 1px solid var(--border-glow);
      transition: all var(--transition-smooth);
    }

    .btn-login:hover {
      background: rgba(0, 240, 255, 0.08);
      box-shadow: var(--shadow-glow);
    }

    .btn-signup {
      padding: 8px 22px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 0.9rem;
      background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
      color: #000;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
    }

    .btn-signup:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.6rem;
      padding: 6px;
      line-height: 1;
    }

    /* ARTICLE BANNER */
    .article-banner {
      padding-top: 104px;
      padding-bottom: 40px;
      background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
      border-bottom: 1px solid var(--border-color);
    }

    .banner-inner {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 860px;
    }

    .article-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .article-category {
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid var(--border-glow);
      color: var(--accent-cyan);
      padding: 4px 14px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.8rem;
      text-transform: uppercase;
      letter-spacing: 0.03em;
    }

    .article-date {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .article-banner h1 {
      font-size: 2.4rem;
      line-height: 1.25;
      background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* ARTICLE CONTENT */
    .article-content-section {
      padding: 48px 0 64px;
    }

    .content-layout {
      display: grid;
      grid-template-columns: 1fr 320px;
      gap: 48px;
      align-items: start;
    }

    .article-body {
      background: var(--bg-card-solid);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px 44px;
      backdrop-filter: blur(10px);
      box-shadow: var(--shadow-md);
      max-width: 760px;
    }

    .article-body h2 {
      font-size: 1.7rem;
      margin-top: 32px;
      margin-bottom: 14px;
      color: var(--accent-cyan);
      line-height: 1.3;
    }

    .article-body h3 {
      font-size: 1.35rem;
      margin-top: 24px;
      margin-bottom: 10px;
      color: var(--text-primary);
    }

    .article-body p {
      margin-bottom: 16px;
      color: var(--text-secondary);
      line-height: 1.7;
      font-size: 1.02rem;
    }

    .article-body ul, .article-body ol {
      margin-bottom: 20px;
      padding-left: 24px;
      color: var(--text-secondary);
    }

    .article-body li {
      margin-bottom: 8px;
      line-height: 1.65;
    }

    .article-body strong {
      color: var(--text-primary);
      font-weight: 700;
    }

    .article-body img {
      border-radius: var(--radius-md);
      margin: 28px 0;
      width: 100%;
      border: 1px solid var(--border-color);
    }

    .article-body blockquote {
      border-left: 4px solid var(--accent-cyan);
      background: rgba(0, 240, 255, 0.05);
      padding: 16px 24px;
      border-radius: var(--radius-sm);
      margin: 24px 0;
      font-style: italic;
      color: var(--text-secondary);
    }

    /* SIDEBAR */
    .article-sidebar {
      display: flex;
      flex-direction: column;
      gap: 28px;
      position: sticky;
      top: 100px;
    }

    .sidebar-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      backdrop-filter: blur(12px);
      box-shadow: var(--shadow-sm);
    }

    .sidebar-card h4 {
      font-size: 1.15rem;
      margin-bottom: 16px;
      color: var(--accent-cyan);
    }

    .sidebar-card ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .sidebar-card ul li a {
      display: block;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      color: var(--text-secondary);
      font-size: 0.92rem;
      transition: all var(--transition-smooth);
      border: 1px solid transparent;
    }

    .sidebar-card ul li a:hover {
      background: rgba(0, 240, 255, 0.06);
      border-color: var(--border-glow);
      color: #fff;
      box-shadow: var(--shadow-glow);
    }

    .cta-sidebar {
      background: linear-gradient(135deg, rgba(0, 82, 255, 0.18) 0%, rgba(0, 240, 255, 0.12) 100%);
      text-align: center;
    }

    .cta-sidebar p {
      font-size: 0.95rem;
      color: var(--text-secondary);
      margin-bottom: 16px;
      line-height: 1.55;
    }

    .btn-cta-sidebar {
      display: inline-block;
      width: 100%;
      padding: 12px 20px;
      border-radius: var(--radius-full);
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #000;
      font-size: 0.95rem;
      transition: all var(--transition-smooth);
      box-shadow: var(--shadow-glow);
      text-align: center;
    }

    .btn-cta-sidebar:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-2px);
    }

    /* NOT FOUND */
    .not-found-block {
      text-align: left;
      padding: 48px 32px;
    }

    .not-found-block h2 {
      font-size: 1.8rem;
      margin-bottom: 12px;
    }

    .not-found-block p {
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .btn-back-home {
      display: inline-block;
      padding: 12px 28px;
      border-radius: var(--radius-full);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #000;
      font-weight: 700;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
    }

    .btn-back-home:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-2px);
    }

    /* RELATED SECTION */
    .related-section {
      padding: 56px 0 72px;
      border-top: 1px solid var(--border-color);
    }

    .related-section h2 {
      font-size: 2rem;
      margin-bottom: 32px;
      color: var(--text-primary);
    }

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

    .related-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all var(--transition-smooth);
      backdrop-filter: blur(10px);
    }

    .related-card:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }

    .related-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      border-bottom: 1px solid var(--border-color);
    }

    .related-card-body {
      padding: 18px;
    }

    .related-card-body h4 {
      font-size: 1.05rem;
      margin-bottom: 8px;
      color: #fff;
    }

    .related-card-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .related-card-body a {
      display: inline-block;
      margin-top: 12px;
      font-weight: 600;
      color: var(--accent-cyan);
      font-size: 0.9rem;
    }

    .related-card-body a:hover {
      color: #fff;
    }

    /* FOOTER */
    .site-footer {
      background: var(--bg-secondary);
      border-top: 1px solid var(--border-color);
      padding: 48px 0 28px;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 36px;
      margin-bottom: 32px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      margin-bottom: 14px;
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .footer-col a {
      display: block;
      color: var(--text-muted);
      font-size: 0.9rem;
      padding: 5px 0;
      transition: color var(--transition-fast);
    }

    .footer-col a:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: var(--text-muted);
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
    }

    /* FAB */
    .fab-floating {
      position: fixed;
      left: 16px;
      bottom: 96px;
      z-index: 50;
      width: 52px;
      height: 52px;
      border-radius: var(--radius-full);
      background: rgba(8, 9, 15, 0.7);
      backdrop-filter: blur(14px);
      border: 2px solid transparent;
      background-clip: padding-box;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-cyan);
      font-size: 1.6rem;
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
      transition: all var(--transition-smooth);
      animation: fabPulse 2.2s infinite;
    }

    .fab-floating::before {
      content: '';
      position: absolute;
      inset: -2px;
      border-radius: inherit;
      background: linear-gradient(135deg, #00F0FF, #0052FF);
      z-index: -1;
      opacity: 0.6;
    }

    .fab-floating:hover {
      transform: scale(1.12);
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.75);
      animation: none;
    }

    @keyframes fabPulse {
      0%, 100% { opacity: 0.7; transform: translateY(0); }
      50% { opacity: 1; transform: translateY(-4px); }
    }

    /* RESPONSIVE */
    @media (max-width: 1024px) {
      .content-layout {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .article-body {
        max-width: 100%;
        padding: 32px 28px;
      }

      .article-sidebar {
        position: static;
      }

      .related-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .article-banner h1 {
        font-size: 2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        gap: 0;
      }

      .nav-links a {
        padding: 6px 13px;
        font-size: 0.88rem;
      }

      .related-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 640px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: rgba(8, 9, 15, 0.96);
        backdrop-filter: blur(20px);
        padding: 16px 20px;
        gap: 8px;
        border-bottom: 1px solid var(--border-color);
      }

      .nav-links.open {
        display: flex;
      }

      .menu-toggle {
        display: block;
      }

      .nav-auth {
        gap: 8px;
      }

      .btn-login,
      .btn-signup {
        padding: 6px 16px;
        font-size: 0.82rem;
      }

      .article-body {
        padding: 24px 18px;
      }

      .article-banner h1 {
        font-size: 1.6rem;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }

      .fab-floating {
        left: 12px;
        bottom: 80px;
        width: 46px;
        height: 46px;
        font-size: 1.4rem;
      }
    }

/* roulang page: category1 */
:root {
      --bg-primary: #08090F;
      --bg-secondary: #0D111E;
      --bg-card: rgba(13, 17, 30, 0.85);
      --bg-card-solid: #111827;
      --accent-cyan: #00F0FF;
      --accent-blue: #0052FF;
      --accent-purple: #7B2FF7;
      --text-primary: #FFFFFF;
      --text-secondary: #CBD5E1;
      --text-muted: #94A3B8;
      --border-color: rgba(0, 240, 255, 0.18);
      --border-glow: rgba(0, 240, 255, 0.45);
      --radius-sm: 14px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
      --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.55);
      --shadow-glow: 0 0 16px rgba(0, 240, 255, 0.35);
      --shadow-glow-strong: 0 0 28px rgba(0, 240, 255, 0.55);
      --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
      --font-display: 'Inter', 'Segoe UI', system-ui, sans-serif;
      --transition-fast: 0.18s ease;
      --transition-smooth: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      background-image: radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

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

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

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    h1, h2, h3, .display-heading {
      font-family: var(--font-display);
      font-weight: 700;
      letter-spacing: -0.01em;
    }

    /* HEADER / NAV */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(8, 9, 15, 0.78);
      backdrop-filter: blur(18px) saturate(140%);
      -webkit-backdrop-filter: blur(18px) saturate(140%);
      border-bottom: 1px solid var(--border-color);
      transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
    }

    .site-header.scrolled {
      background: rgba(8, 9, 15, 0.92);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
    }

    .brand-icon {
      width: 36px;
      height: 36px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: #fff;
      flex-shrink: 0;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2px;
      list-style: none;
      flex-wrap: wrap;
    }

    .nav-links a {
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: all var(--transition-smooth);
      position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
      background: rgba(0, 240, 255, 0.08);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.18);
    }

    .nav-auth {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-login {
      padding: 8px 20px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-primary);
      background: transparent;
      border: 1px solid var(--border-glow);
      transition: all var(--transition-smooth);
    }

    .btn-login:hover {
      background: rgba(0, 240, 255, 0.08);
      box-shadow: var(--shadow-glow);
    }

    .btn-signup {
      padding: 8px 22px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 0.9rem;
      background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
      color: #000;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
    }

    .btn-signup:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.6rem;
      padding: 6px;
      line-height: 1;
    }

    /* HERO – category specific */
    .cat-hero {
      padding-top: 130px;
      padding-bottom: 70px;
      background-image: linear-gradient(rgba(8, 9, 15, 0.85), rgba(8, 9, 15, 0.9)), url('/assets/images/backpic/back-1.jpg');
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .cat-hero-content {
      display: flex;
      align-items: center;
      gap: 50px;
    }

    .cat-hero-text {
      flex: 1;
    }

    .cat-hero-text h1 {
      font-size: 2.6rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
      background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .cat-hero-text p {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 28px;
      line-height: 1.7;
    }

    .cat-hero-image {
      flex: 0.8;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-glow-strong);
    }

    .cat-hero-image img {
      width: 100%;
      height: auto;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    .btn-primary-glow {
      padding: 12px 32px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 1rem;
      background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
      color: #000;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
    }

    .btn-primary-glow:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-2px);
    }

    .btn-outline-glow {
      padding: 12px 32px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 1rem;
      background: transparent;
      border: 1.5px solid var(--border-glow);
      color: var(--text-primary);
      transition: all var(--transition-smooth);
    }

    .btn-outline-glow:hover {
      background: rgba(0, 240, 255, 0.08);
      box-shadow: var(--shadow-glow);
    }

    /* Stats Row */
    .stats-row {
      display: flex;
      gap: 30px;
      margin-top: 32px;
      flex-wrap: wrap;
    }

    .stat-item {
      text-align: left;
    }

    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent-cyan);
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* CATEGORY FEATURES */
    .category-features {
      padding: 80px 0;
    }

    .section-header {
      margin-bottom: 50px;
    }

    .section-header h2 {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }

    .section-header p {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 700px;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card-solid);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: all var(--transition-smooth);
      text-align: left;
    }

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

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
      font-size: 1.4rem;
      color: #000;
    }

    .feature-card h3 {
      font-size: 1.3rem;
      margin-bottom: 10px;
      color: #fff;
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* HOW IT WORKS */
    .how-it-works {
      padding: 80px 0;
      background: var(--bg-secondary);
    }

    .steps-list {
      display: flex;
      flex-direction: column;
      gap: 30px;
      max-width: 800px;
      margin: 0 auto;
    }

    .step-item {
      display: flex;
      gap: 24px;
      align-items: flex-start;
    }

    .step-marker {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-full);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      color: #000;
      flex-shrink: 0;
    }

    .step-content h3 {
      font-size: 1.2rem;
      margin-bottom: 6px;
      color: #fff;
    }

    .step-content p {
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* FAQ */
    .faq-section {
      padding: 80px 0;
    }

    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-card-solid);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all var(--transition-smooth);
    }

    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1.05rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      color: #fff;
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.7;
      display: none;
    }

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

    .faq-item.active {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-glow);
    }

    /* CTA */
    .cta-section {
      padding: 70px 0;
      background: linear-gradient(135deg, rgba(0, 82, 255, 0.1) 0%, rgba(0, 240, 255, 0.05) 100%);
    }

    .cta-card {
      background: var(--bg-card-solid);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 48px 32px;
      text-align: left;
      box-shadow: var(--shadow-glow);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 30px;
    }

    .cta-card h2 {
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #fff;
    }

    .cta-card p {
      color: var(--text-secondary);
      margin: 0;
    }

    .cta-btn {
      padding: 14px 36px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 1rem;
      background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
      color: #000;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
      white-space: nowrap;
    }

    .cta-btn:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: scale(1.04);
    }

    /* FAB */
    .fab {
      position: fixed;
      left: 16px;
      bottom: 96px;
      z-index: 50;
      width: 52px;
      height: 52px;
      border-radius: var(--radius-full);
      background: rgba(0, 0, 0, 0.65);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 2px solid transparent;
      border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #00F0FF;
      font-size: 1.4rem;
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
      cursor: pointer;
      transition: all var(--transition-smooth);
      opacity: 0.7;
      animation: floatFab 2.8s infinite ease-in-out;
    }

    .fab:hover {
      opacity: 1;
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.8);
      transform: scale(1.1);
    }

    @keyframes floatFab {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }

    /* FOOTER */
    .site-footer {
      background: var(--bg-secondary);
      padding: 48px 0 28px;
      border-top: 1px solid var(--border-color);
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 32px;
      margin-bottom: 32px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }

    .footer-col a {
      display: block;
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      transition: color var(--transition-fast);
    }

    .footer-col a:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }

    /* RESPONSIVE */
    @media (max-width: 1024px) {
      .cat-hero-content {
        flex-direction: column;
      }
      .cat-hero-image {
        max-width: 500px;
        width: 100%;
      }
      .cat-hero-text h1 {
        font-size: 2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: rgba(8, 9, 15, 0.96);
        backdrop-filter: blur(20px);
        padding: 16px 20px;
        gap: 8px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.open {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .nav-auth {
        gap: 8px;
      }
      .btn-login,
      .btn-signup {
        padding: 6px 16px;
        font-size: 0.82rem;
      }
      .cat-hero-text h1 {
        font-size: 1.7rem;
      }
      .stats-row {
        gap: 16px;
      }
      .stat-number {
        font-size: 1.6rem;
      }
      .cta-card {
        flex-direction: column;
        text-align: left;
        align-items: flex-start;
      }
    }

    @media (max-width: 520px) {
      .header-inner {
        height: 56px;
      }
      .brand {
        font-size: 1rem;
      }
      .cat-hero {
        padding-top: 100px;
        padding-bottom: 50px;
      }
      .cat-hero-text h1 {
        font-size: 1.5rem;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .btn-primary-glow,
      .btn-outline-glow {
        width: 100%;
        text-align: center;
      }
      .feature-card {
        padding: 24px 18px;
      }
      .faq-question {
        font-size: 0.95rem;
      }
    }

/* roulang page: category2 */
:root {
        --bg-primary: #08090F;
        --bg-secondary: #0D111E;
        --bg-card: rgba(13, 17, 30, 0.85);
        --bg-card-solid: #111827;
        --accent-cyan: #00F0FF;
        --accent-blue: #0052FF;
        --accent-purple: #7B2FF7;
        --text-primary: #FFFFFF;
        --text-secondary: #CBD5E1;
        --text-muted: #94A3B8;
        --border-color: rgba(0, 240, 255, 0.18);
        --border-glow: rgba(0, 240, 255, 0.45);
        --radius-sm: 14px;
        --radius-md: 20px;
        --radius-lg: 28px;
        --radius-full: 9999px;
        --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
        --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.55);
        --shadow-glow: 0 0 16px rgba(0, 240, 255, 0.35);
        --shadow-glow-strong: 0 0 28px rgba(0, 240, 255, 0.55);
        --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        --font-display: 'Inter', 'Segoe UI', system-ui, sans-serif;
        --transition-fast: 0.18s ease;
        --transition-smooth: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

    body {
        font-family: var(--font-sans);
        background: var(--bg-primary);
        color: var(--text-primary);
        line-height: 1.6;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        background-image: radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
            radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
    }

    .container {
        width: 100%;
        max-width: 1240px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 20px;
        padding-right: 20px;
    }

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

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

    button {
        font-family: inherit;
        cursor: pointer;
        border: none;
        background: none;
    }

    h1, h2, h3, .display-heading {
        font-family: var(--font-display);
        font-weight: 700;
        letter-spacing: -0.01em;
    }

    /* HEADER / NAV */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 100;
        background: rgba(8, 9, 15, 0.78);
        backdrop-filter: blur(18px) saturate(140%);
        -webkit-backdrop-filter: blur(18px) saturate(140%);
        border-bottom: 1px solid var(--border-color);
        transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
    }

    .site-header.scrolled {
        background: rgba(8, 9, 15, 0.92);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 64px;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 10px;
        font-weight: 800;
        font-size: 1.25rem;
        letter-spacing: -0.02em;
        background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 70%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        white-space: nowrap;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
        border-radius: var(--radius-sm);
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        color: #fff;
        flex-shrink: 0;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 2px;
        list-style: none;
        flex-wrap: wrap;
    }

    .nav-links a {
        padding: 8px 18px;
        border-radius: var(--radius-full);
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-secondary);
        transition: all var(--transition-smooth);
        position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: #fff;
        background: rgba(0, 240, 255, 0.08);
        box-shadow: 0 0 12px rgba(0, 240, 255, 0.18);
    }

    .nav-auth {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .btn-login {
        padding: 8px 20px;
        border-radius: var(--radius-full);
        font-weight: 600;
        font-size: 0.9rem;
        color: var(--text-primary);
        background: transparent;
        border: 1px solid var(--border-glow);
        transition: all var(--transition-smooth);
    }

    .btn-login:hover {
        background: rgba(0, 240, 255, 0.08);
        box-shadow: var(--shadow-glow);
    }

    .btn-signup {
        padding: 8px 22px;
        border-radius: var(--radius-full);
        font-weight: 700;
        font-size: 0.9rem;
        background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
        color: #000;
        box-shadow: var(--shadow-glow);
        transition: all var(--transition-smooth);
    }

    .btn-signup:hover {
        box-shadow: var(--shadow-glow-strong);
        transform: translateY(-1px);
    }

    .menu-toggle {
        display: none;
        background: none;
        border: none;
        color: #fff;
        font-size: 1.6rem;
        padding: 6px;
        line-height: 1;
    }

    /* Category Hero */
    .cat-hero {
        padding-top: 120px;
        padding-bottom: 60px;
        background: linear-gradient(180deg, rgba(0, 82, 255, 0.12) 0%, transparent 60%);
        border-bottom: 1px solid var(--border-color);
    }

    .cat-hero-grid {
        display: grid;
        grid-template-columns: 1fr 480px;
        gap: 48px;
        align-items: center;
    }

    .cat-hero-content h1 {
        font-size: 2.8rem;
        font-weight: 800;
        line-height: 1.2;
        margin-bottom: 16px;
        background: linear-gradient(135deg, #fff 0%, var(--accent-cyan) 80%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .cat-hero-content .lead {
        font-size: 1.15rem;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 24px;
    }

    .cat-hero-stats {
        display: flex;
        gap: 32px;
        margin-bottom: 28px;
    }

    .stat-item {
        display: flex;
        flex-direction: column;
    }

    .stat-number {
        font-size: 2rem;
        font-weight: 800;
        background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .stat-label {
        font-size: 0.85rem;
        color: var(--text-muted);
    }

    .cat-hero-visual {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-glow-strong);
        border: 1px solid var(--border-glow);
    }

    .cat-hero-visual img {
        width: 100%;
        height: auto;
        display: block;
    }

    .cat-hero-visual::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(0, 240, 255, 0.15) 0%, rgba(0, 82, 255, 0.1) 100%);
        pointer-events: none;
    }

    /* Content Sections */
    .content-section {
        padding: 80px 0;
    }

    .content-section.bg-alt {
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }

    .section-header {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 24px;
        margin-bottom: 48px;
    }

    .section-header h2 {
        font-size: 2rem;
        font-weight: 700;
        line-height: 1.3;
        max-width: 600px;
    }

    .section-header .section-desc {
        color: var(--text-secondary);
        font-size: 1rem;
        line-height: 1.7;
        max-width: 460px;
    }

    /* Advanced Cards Grid */
    .advanced-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .advanced-card {
        background: var(--bg-card);
        backdrop-filter: blur(12px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 32px;
        transition: all var(--transition-smooth);
        position: relative;
        overflow: hidden;
    }

    .advanced-card:hover {
        border-color: var(--border-glow);
        box-shadow: var(--shadow-glow);
        transform: translateY(-4px);
    }

    .advanced-card .card-number {
        position: absolute;
        top: 20px;
        right: 24px;
        font-size: 4rem;
        font-weight: 900;
        color: rgba(0, 240, 255, 0.04);
        line-height: 1;
        pointer-events: none;
    }

    .advanced-card .card-icon {
        width: 56px;
        height: 56px;
        border-radius: var(--radius-sm);
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: #fff;
        margin-bottom: 20px;
    }

    .advanced-card h3 {
        font-size: 1.25rem;
        font-weight: 700;
        margin-bottom: 12px;
        color: var(--text-primary);
    }

    .advanced-card p {
        font-size: 0.95rem;
        color: var(--text-secondary);
        line-height: 1.7;
    }

    .advanced-card .card-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 16px;
    }

    .tag {
        display: inline-block;
        padding: 4px 14px;
        border-radius: var(--radius-full);
        font-size: 0.8rem;
        font-weight: 600;
        background: rgba(0, 240, 255, 0.1);
        color: var(--accent-cyan);
        border: 1px solid rgba(0, 240, 255, 0.25);
    }

    /* Timeline / Process */
    .process-flow {
        display: flex;
        gap: 0;
        position: relative;
        margin: 48px 0;
    }

    .process-step {
        flex: 1;
        text-align: left;
        position: relative;
        padding: 0 16px;
    }

    .process-step .step-icon {
        width: 64px;
        height: 64px;
        border-radius: var(--radius-md);
        background: var(--bg-card);
        border: 2px solid var(--border-glow);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        color: var(--accent-cyan);
        margin-bottom: 16px;
        transition: all var(--transition-smooth);
    }

    .process-step:hover .step-icon {
        box-shadow: var(--shadow-glow-strong);
        border-color: var(--accent-cyan);
    }

    .process-step h4 {
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 8px;
    }

    .process-step p {
        font-size: 0.9rem;
        color: var(--text-secondary);
        line-height: 1.6;
    }

    .process-step .step-connector {
        position: absolute;
        top: 32px;
        left: 100%;
        width: calc(100% + 16px);
        height: 2px;
        background: linear-gradient(90deg, var(--border-glow), transparent);
        z-index: 0;
    }

    .process-step:last-child .step-connector {
        display: none;
    }

    /* FAQ */
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .faq-item {
        background: var(--bg-card);
        backdrop-filter: blur(12px);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all var(--transition-smooth);
    }

    .faq-item:hover {
        border-color: var(--border-glow);
    }

    .faq-question {
        width: 100%;
        text-align: left;
        padding: 20px 24px;
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--text-primary);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        transition: all var(--transition-fast);
    }

    .faq-question:hover {
        color: var(--accent-cyan);
    }

    .faq-question i {
        transition: transform var(--transition-fast);
        font-size: 1.1rem;
        color: var(--accent-cyan);
    }

    .faq-answer {
        padding: 0 24px 20px;
        font-size: 0.95rem;
        color: var(--text-secondary);
        line-height: 1.7;
        display: none;
    }

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

    .faq-item.active .faq-question i {
        transform: rotate(180deg);
    }

    .faq-item.active {
        border-color: var(--border-glow);
        box-shadow: var(--shadow-glow);
    }

    /* CTA Section */
    .cta-section {
        padding: 60px 0;
        text-align: center;
    }

    .cta-box {
        background: linear-gradient(135deg, rgba(0, 82, 255, 0.2) 0%, rgba(0, 240, 255, 0.1) 100%);
        border: 1px solid var(--border-glow);
        border-radius: var(--radius-lg);
        padding: 56px 32px;
        box-shadow: var(--shadow-glow);
    }

    .cta-box h2 {
        font-size: 2rem;
        font-weight: 800;
        margin-bottom: 16px;
    }

    .cta-box p {
        font-size: 1.05rem;
        color: var(--text-secondary);
        margin-bottom: 32px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
    }

    .btn-cta {
        display: inline-block;
        padding: 14px 40px;
        border-radius: var(--radius-full);
        font-weight: 700;
        font-size: 1.05rem;
        background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
        color: #000;
        box-shadow: var(--shadow-glow-strong);
        transition: all var(--transition-smooth);
    }

    .btn-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 0 36px rgba(0, 240, 255, 0.65);
    }

    /* FOOTER */
    .site-footer {
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        padding: 48px 0 24px;
        margin-top: auto;
    }

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

    .footer-col h4 {
        font-size: 1rem;
        font-weight: 700;
        margin-bottom: 16px;
        color: var(--text-primary);
    }

    .footer-col a {
        display: block;
        color: var(--text-muted);
        font-size: 0.9rem;
        padding: 6px 0;
        transition: color var(--transition-fast);
    }

    .footer-col a:hover {
        color: var(--accent-cyan);
    }

    .footer-bottom {
        border-top: 1px solid var(--border-color);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: var(--text-muted);
    }

    /* Floating Action Button */
    .fab {
        position: fixed;
        left: 16px;
        bottom: 96px;
        z-index: 50;
        width: 56px;
        height: 56px;
        border-radius: var(--radius-full);
        background: rgba(8, 9, 15, 0.6);
        backdrop-filter: blur(14px);
        border: 2px solid transparent;
        background-clip: padding-box;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: var(--accent-cyan);
        box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
        transition: all var(--transition-smooth);
        animation: fabPulse 2.5s ease-in-out infinite;
    }

    .fab:hover {
        transform: scale(1.1);
        box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
        border-color: var(--accent-cyan);
    }

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

    .fab .notification-dot {
        position: absolute;
        top: 8px;
        right: 8px;
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: #FF007F;
        box-shadow: 0 0 8px #FF007F;
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .cat-hero-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }

        .cat-hero-visual {
            max-width: 400px;
            margin: 0 auto;
        }

        .advanced-grid {
            grid-template-columns: 1fr;
        }

        .section-header {
            flex-direction: column;
        }

        .process-flow {
            flex-direction: column;
            gap: 24px;
        }

        .process-step .step-connector {
            display: none;
        }
    }

    @media (max-width: 768px) {
        .nav-links {
            display: none;
            position: absolute;
            top: 64px;
            left: 0;
            width: 100%;
            flex-direction: column;
            background: rgba(8, 9, 15, 0.96);
            backdrop-filter: blur(20px);
            padding: 16px 20px;
            gap: 8px;
            border-bottom: 1px solid var(--border-color);
        }

        .nav-links.open {
            display: flex;
        }

        .menu-toggle {
            display: block;
        }

        .nav-auth {
            gap: 8px;
        }

        .btn-login,
        .btn-signup {
            padding: 6px 16px;
            font-size: 0.82rem;
        }

        .cat-hero {
            padding-top: 100px;
            padding-bottom: 40px;
        }

        .cat-hero-content h1 {
            font-size: 2rem;
        }

        .cat-hero-stats {
            flex-wrap: wrap;
            gap: 20px;
        }

        .content-section {
            padding: 48px 0;
        }

        .section-header h2 {
            font-size: 1.6rem;
        }

        .cta-box {
            padding: 36px 20px;
        }

        .cta-box h2 {
            font-size: 1.5rem;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
    }

    @media (max-width: 520px) {
        .cat-hero-content h1 {
            font-size: 1.6rem;
        }

        .advanced-card {
            padding: 20px;
        }
    }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.85);
            --bg-card-solid: #111827;
            --accent-cyan: #00F0FF;
            --accent-blue: #0052FF;
            --accent-purple: #7B2FF7;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: rgba(0, 240, 255, 0.18);
            --border-glow: rgba(0, 240, 255, 0.45);
            --radius-sm: 14px;
            --radius-md: 20px;
            --radius-lg: 28px;
            --radius-full: 9999px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.55);
            --shadow-glow: 0 0 16px rgba(0, 240, 255, 0.35);
            --shadow-glow-strong: 0 0 28px rgba(0, 240, 255, 0.55);
            --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-display: 'Inter', 'Segoe UI', system-ui, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background-image: radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
        }
        .container {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        h1,
        h2,
        h3,
        .display-heading {
            font-family: var(--font-display);
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(8, 9, 15, 0.78);
            backdrop-filter: blur(18px) saturate(140%);
            -webkit-backdrop-filter: blur(18px) saturate(140%);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }
        .site-header.scrolled {
            background: rgba(8, 9, 15, 0.92);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 70%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #fff;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
            list-style: none;
            flex-wrap: wrap;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-smooth);
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: #fff;
            background: rgba(0, 240, 255, 0.08);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.18);
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            padding: 8px 20px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-glow);
            transition: all var(--transition-smooth);
        }
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.08);
            box-shadow: var(--shadow-glow);
        }
        .btn-signup {
            padding: 8px 22px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #000;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-smooth);
        }
        .btn-signup:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-1px);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.6rem;
            padding: 6px;
            line-height: 1;
        }
        .hero-section {
            padding-top: 130px;
            padding-bottom: 40px;
            position: relative;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 18px;
            background: linear-gradient(135deg, #FFFFFF 10%, var(--accent-cyan) 60%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-text .subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .hero-btns {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary {
            padding: 12px 30px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1rem;
            background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
            color: #000;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            box-shadow: var(--shadow-glow-strong);
            transform: translateY(-2px);
        }
        .btn-secondary {
            padding: 12px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--border-glow);
            color: var(--text-primary);
            transition: all var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.08);
            box-shadow: var(--shadow-glow);
        }
        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hero-img-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md), 0 0 40px rgba(0, 240, 255, 0.2);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
        }
        .hero-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
            opacity: 0.95;
            transition: opacity var(--transition-smooth);
        }
        .hero-img-wrap:hover img {
            opacity: 1;
        }
        .floating-badge {
            position: absolute;
            top: -12px;
            right: -12px;
            background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 0.85rem;
            box-shadow: var(--shadow-glow);
            z-index: 2;
        }
        .stats-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 32px;
        }
        .stat-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: left;
            transition: all var(--transition-smooth);
        }
        .stat-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .section {
            padding: 64px 0;
        }
        .section-header {
            margin-bottom: 42px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(8px);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 40%;
            background: linear-gradient(180deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 0 0 4px 0;
            transition: height var(--transition-smooth);
        }
        .feature-card:hover::before {
            height: 70%;
        }
        .feature-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .strategy-steps {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .step-block {
            background: var(--bg-card-solid);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all var(--transition-smooth);
        }
        .step-block:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-full);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            color: #000;
            flex-shrink: 0;
        }
        .step-content h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .video-showcase {
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            overflow: hidden;
            position: relative;
        }
        .video-thumb {
            position: relative;
            cursor: pointer;
            overflow: hidden;
        }
        .video-thumb img {
            width: 100%;
            height: auto;
            transition: transform var(--transition-smooth);
        }
        .video-thumb:hover img {
            transform: scale(1.03);
        }
        .play-overlay {
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 0, 0, 0.35);
            transition: background var(--transition-smooth);
        }
        .play-overlay:hover {
            background: rgba(0, 0, 0, 0.5);
        }
        .play-btn-circle {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: #000;
            box-shadow: var(--shadow-glow-strong);
            transition: transform var(--transition-smooth);
        }
        .play-btn-circle:hover {
            transform: scale(1.1);
        }
        .video-info {
            padding: 20px 24px;
        }
        .video-info h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .video-info p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(8px);
            transition: all var(--transition-smooth);
        }
        .testimonial-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
        }
        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
        }
        .testimonial-name {
            font-weight: 700;
            font-size: 0.95rem;
        }
        .testimonial-role {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .testimonial-body {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            font-style: italic;
        }
        .stars {
            color: #FFD700;
            margin-top: 8px;
            font-size: 0.9rem;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .faq-item {
            background: var(--bg-card-solid);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-sm);
        }
        .faq-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-item h4 i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
        }
        .faq-item p {
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.6;
        }
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.12) 0%, rgba(0, 240, 255, 0.08) 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: left;
            backdrop-filter: blur(12px);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 8px;
        }
        .cta-content p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 540px;
        }
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 28px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.93rem;
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 40px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-full);
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)),
                linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all var(--transition-smooth);
            cursor: pointer;
            animation: pulse-float 2.5s ease-in-out infinite;
        }
        .fab-left:hover {
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
            transform: scale(1.08);
        }
        @keyframes pulse-float {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-6px);
            }
        }
        .fab-left i {
            font-size: 1.6rem;
            color: var(--accent-cyan);
        }
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-text h1 {
                font-size: 2.2rem;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .strategy-steps {
                grid-template-columns: 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(8, 9, 15, 0.96);
                backdrop-filter: blur(20px);
                padding: 16px 20px;
                gap: 8px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.open {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .nav-auth {
                gap: 8px;
            }
            .btn-login,
            .btn-signup {
                padding: 6px 16px;
                font-size: 0.82rem;
            }
            .hero-text h1 {
                font-size: 1.8rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .cta-section {
                flex-direction: column;
                text-align: center;
                padding: 36px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .section {
                padding: 42px 0;
            }
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr;
            }
            .hero-btns {
                flex-direction: column;
                gap: 10px;
            }
            .btn-primary,
            .btn-secondary {
                justify-content: center;
            }
            .floating-badge {
                top: -8px;
                right: 4px;
                padding: 6px 14px;
                font-size: 0.75rem;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
        }

/* roulang page: category4 */
:root {
      --bg-primary: #08090F;
      --bg-secondary: #0D111E;
      --bg-card: rgba(13, 17, 30, 0.85);
      --bg-card-solid: #111827;
      --accent-cyan: #00F0FF;
      --accent-blue: #0052FF;
      --accent-purple: #7B2FF7;
      --text-primary: #FFFFFF;
      --text-secondary: #CBD5E1;
      --text-muted: #94A3B8;
      --border-color: rgba(0, 240, 255, 0.18);
      --border-glow: rgba(0, 240, 255, 0.45);
      --radius-sm: 14px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --radius-full: 9999px;
      --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
      --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.55);
      --shadow-glow: 0 0 16px rgba(0, 240, 255, 0.35);
      --shadow-glow-strong: 0 0 28px rgba(0, 240, 255, 0.55);
      --font-sans: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
      --font-display: 'Inter', 'Segoe UI', system-ui, sans-serif;
      --transition-fast: 0.18s ease;
      --transition-smooth: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      background-image: radial-gradient(ellipse at 20% 10%, rgba(0, 82, 255, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 80% 70%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition-fast);
    }
    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }
    h1, h2, h3, .display-heading {
      font-family: var(--font-display);
      font-weight: 700;
      letter-spacing: -0.01em;
    }
    /* HEADER / NAV */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: rgba(8, 9, 15, 0.78);
      backdrop-filter: blur(18px) saturate(140%);
      -webkit-backdrop-filter: blur(18px) saturate(140%);
      border-bottom: 1px solid var(--border-color);
      transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
    }
    .site-header.scrolled {
      background: rgba(8, 9, 15, 0.92);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      white-space: nowrap;
    }
    .brand-icon {
      width: 36px;
      height: 36px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      color: #fff;
      flex-shrink: 0;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2px;
      list-style: none;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-secondary);
      transition: all var(--transition-smooth);
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
      background: rgba(0, 240, 255, 0.08);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.18);
    }
    .nav-auth {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-login {
      padding: 8px 20px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-primary);
      background: transparent;
      border: 1px solid var(--border-glow);
      transition: all var(--transition-smooth);
    }
    .btn-login:hover {
      background: rgba(0, 240, 255, 0.08);
      box-shadow: var(--shadow-glow);
    }
    .btn-signup {
      padding: 8px 22px;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 0.9rem;
      background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
      color: #000;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
    }
    .btn-signup:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      font-size: 1.6rem;
      padding: 6px;
      line-height: 1;
    }
    @media (min-width: 769px) and (max-width: 1024px) {
      .nav-links a {
        padding: 6px 13px;
        font-size: 0.88rem;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: rgba(8, 9, 15, 0.96);
        backdrop-filter: blur(20px);
        padding: 16px 20px;
        gap: 8px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.open {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .nav-auth {
        gap: 8px;
      }
      .btn-login, .btn-signup {
        padding: 6px 16px;
        font-size: 0.82rem;
      }
    }
    /* MAIN */
    main.page-main {
      flex: 1;
      padding-top: 64px;
    }
    .content-section {
      padding: 64px 0;
    }
    /* HERO CATEGORY */
    .cat-hero {
      padding: 60px 0 50px;
      background: radial-gradient(ellipse at 30% 0%, rgba(0, 82, 255, 0.12) 0%, transparent 65%),
                  radial-gradient(ellipse at 70% 100%, rgba(0, 240, 255, 0.07) 0%, transparent 55%);
      border-bottom: 1px solid var(--border-color);
    }
    .cat-hero .inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .cat-hero-text h1 {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 18px;
      background: linear-gradient(135deg, #fff 20%, var(--accent-cyan) 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .cat-hero-text .lead {
      font-size: 1.12rem;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 24px;
    }
    .cat-hero-stats {
      display: flex;
      gap: 28px;
      margin-bottom: 28px;
    }
    .cat-stat-item {
      text-align: left;
    }
    .cat-stat-item .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1.1;
    }
    .cat-stat-item .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .cat-hero-img {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-glow);
    }
    .cat-hero-img img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .btn-cta-glow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 28px;
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #000;
      border-radius: var(--radius-full);
      font-weight: 700;
      font-size: 1rem;
      box-shadow: var(--shadow-glow);
      transition: all var(--transition-smooth);
    }
    .btn-cta-glow:hover {
      box-shadow: var(--shadow-glow-strong);
      transform: scale(1.03);
    }
    @media (max-width: 768px) {
      .cat-hero .inner {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .cat-hero-text h1 {
        font-size: 1.9rem;
      }
      .cat-hero-stats {
        gap: 18px;
        flex-wrap: wrap;
      }
    }
    /* SECTION HEADING */
    .section-head {
      text-align: left;
      margin-bottom: 36px;
    }
    .section-head h2 {
      font-size: 1.8rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .section-head .sub {
      color: var(--text-muted);
      font-size: 1rem;
    }
    /* TECH CARDS GRID */
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
      gap: 24px;
    }
    .tech-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      transition: all var(--transition-smooth);
      position: relative;
    }
    .tech-card:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-glow);
      transform: translateY(-3px);
    }
    .tech-card .tech-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: rgba(0, 240, 255, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      color: var(--accent-cyan);
      margin-bottom: 16px;
    }
    .tech-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #fff;
    }
    .tech-card p {
      font-size: 0.94rem;
      color: var(--text-secondary);
      line-height: 1.55;
    }
    .tech-card .badge {
      display: inline-block;
      padding: 4px 10px;
      background: rgba(0, 240, 255, 0.12);
      color: var(--accent-cyan);
      border-radius: var(--radius-full);
      font-size: 0.78rem;
      font-weight: 600;
      margin-top: 14px;
    }
    /* STEPS / PROCESS */
    .process-list {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .process-item {
      display: grid;
      grid-template-columns: 48px 1fr;
      gap: 18px;
      align-items: flex-start;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 20px;
      transition: all var(--transition-smooth);
    }
    .process-item:hover {
      border-color: var(--border-glow);
      box-shadow: var(--shadow-glow);
    }
    .process-num {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-full);
      background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
      color: #000;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      flex-shrink: 0;
    }
    .process-content h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 6px;
    }
    .process-content p {
      font-size: 0.94rem;
      color: var(--text-secondary);
    }
    /* COMPARISON TABLE */
    .table-wrap {
      overflow-x: auto;
    }
    .table-custom {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.95rem;
    }
    .table-custom thead th {
      background: var(--bg-card-solid);
      color: var(--accent-cyan);
      padding: 14px 18px;
      text-align: left;
      font-weight: 700;
      border-bottom: 2px solid var(--border-glow);
    }
    .table-custom tbody td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-secondary);
    }
    .table-custom tbody tr:hover td {
      background: rgba(0, 240, 255, 0.03);
      color: #fff;
    }
    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 22px;
      transition: all var(--transition-smooth);
    }
    .faq-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .faq-item h4 i {
      color: var(--accent-cyan);
    }
    .faq-item p {
      font-size: 0.94rem;
      color: var(--text-secondary);
      line-height: 1.55;
    }
    .faq-item:hover {
      border-color: var(--border-glow);
    }
    /* CTA BANNER */
    .cta-banner {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      box-shadow: var(--shadow-glow);
    }
    .cta-banner h3 {
      font-size: 1.5rem;
      font-weight: 700;
      color: #fff;
    }
    .cta-banner p {
      font-size: 0.98rem;
      color: var(--text-secondary);
    }
    /* FOOTER */
    .site-footer {
      background: rgba(13, 17, 30, 0.7);
      border-top: 1px solid var(--border-color);
      padding: 48px 0 28px;
      margin-top: auto;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 32px;
      margin-bottom: 32px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 14px;
      color: #fff;
    }
    .footer-col a {
      display: block;
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      transition: color var(--transition-fast);
    }
    .footer-col a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 0.82rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }
    /* FAB LEFT */
    .fab-left {
      position: fixed;
      left: 16px;
      bottom: 96px;
      z-index: 50;
      width: 52px;
      height: 52px;
      border-radius: var(--radius-full);
      background: rgba(8, 9, 15, 0.78);
      backdrop-filter: blur(14px);
      border: 2px solid transparent;
      background-clip: padding-box;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-cyan);
      font-size: 1.5rem;
      box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
      transition: all var(--transition-smooth);
      animation: floatFab 3s ease-in-out infinite;
    }
    .fab-left::before {
      content: '';
      position: absolute;
      inset: -2px;
      border-radius: var(--radius-full);
      padding: 2px;
      background: linear-gradient(135deg, #00F0FF, #0052FF);
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask-composite: xor;
      mask-composite: exclude;
    }
    .fab-left:hover {
      transform: scale(1.1);
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
    }
    @keyframes floatFab {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }
    @media (max-width: 600px) {
      .cta-banner {
        flex-direction: column;
        text-align: left;
      }
      .cat-hero-stats {
        flex-wrap: wrap;
        gap: 14px;
      }
    }