:root {
      --primary: #1D7BFF;
      --primary-hover: #0a66f0;
      --primary-glow: rgba(29, 123, 255, 0.35);
      --bg-dark: rgb(40, 42, 54);
      --bg-darker: #171921;
      --bg-card: rgba(255, 255, 255, 0.04);
      --bg-card-hover: rgba(255, 255, 255, 0.08);
      --border-color: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(29, 123, 255, 0.5);
      --text-light: #F8FAFC;
      --text-gray: #94A3B8;
      --text-muted: #64748B;
      --silver: #E2E8F0;
      --glass: rgba(23, 25, 33, 0.75);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      background-color: var(--bg-darker);
      color: var(--text-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.3s ease;
    }
    a:hover {
      color: var(--text-light);
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .logo img {
      display: block;
      height: 40px;
      width: auto;
      max-width: 160px;
      object-fit: contain;
      flex-shrink: 0;
    }
    .logo span {
      display: inline-block;
      font-size: 20px;
      font-weight: 800;
      line-height: 1;
      color: var(--text-light);
      white-space: nowrap;
      letter-spacing: 0.5px;
    }

    
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--glass);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      padding: 15px 0;
    }
    .header-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .desktop-nav {
      display: flex;
      gap: 25px;
      align-items: center;
    }
    .desktop-nav a {
      color: var(--text-gray);
      font-size: 15px;
      font-weight: 500;
    }
    .desktop-nav a:hover {
      color: var(--primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 15px;
    }
    .btn-download-top {
      background: var(--primary);
      color: var(--text-light);
      padding: 8px 20px;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 600;
      border: none;
      cursor: pointer;
    }
    .btn-download-top:hover {
      background: var(--primary-hover);
      box-shadow: 0 0 15px var(--primary-glow);
    }
    .drawer-trigger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 5px;
    }
    .drawer-trigger span {
      display: block;
      width: 25px;
      height: 2px;
      background: var(--text-light);
      transition: 0.3s;
    }

    
    .drawer-backdrop {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(0,0,0,0.7);
      backdrop-filter: blur(5px);
      z-index: 1000;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
    }
    .drawer-backdrop.active {
      opacity: 1;
      visibility: visible;
    }
    .mobile-drawer {
      position: fixed;
      top: 0;
      left: -300px;
      width: 300px;
      height: 100vh;
      background: var(--bg-darker);
      border-right: 1px solid var(--border-color);
      z-index: 1001;
      display: flex;
      flex-direction: column;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      padding: 20px;
    }
    .mobile-drawer.active {
      left: 0;
    }
    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
    }
    .drawer-close {
      background: none;
      border: none;
      color: var(--text-light);
      font-size: 28px;
      cursor: pointer;
    }
    .mobile-nav {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .mobile-nav a {
      color: var(--text-gray);
      font-size: 16px;
      font-weight: 500;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255,255,255,0.02);
    }
    .mobile-nav a:hover {
      color: var(--primary);
      padding-left: 5px;
    }
    .drawer-footer {
      margin-top: auto;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      font-size: 13px;
      color: var(--text-gray);
    }

    
    .about-hero {
      background: linear-gradient(135deg, rgba(29, 123, 255, 0.12) 0%, transparent 100%), var(--bg-dark);
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }
    .about-hero h1 {
      font-size: 38px;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .about-hero p {
      color: var(--text-gray);
      font-size: 17px;
      max-width: 800px;
      margin: 0 auto;
    }
    .main-about-section {
      padding: 80px 0;
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }
    .about-text h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 25px;
      color: var(--silver);
    }
    .about-text p {
      color: var(--text-gray);
      font-size: 15px;
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .about-visual {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 40px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    }
    .value-box {
      border-left: 4px solid var(--primary);
      padding-left: 15px;
      margin-bottom: 25px;
    }
    .value-box h4 {
      font-size: 18px;
      margin-bottom: 5px;
      color: var(--text-light);
    }
    .value-box p {
      font-size: 14px;
      color: var(--text-gray);
    }

    
    .timeline-section {
      background: var(--bg-dark);
      padding: 80px 0;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .timeline-container {
      max-width: 800px;
      margin: 0 auto;
      position: relative;
    }
    .timeline-container::before {
      content: '';
      position: absolute;
      left: 20px;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border-color);
    }
    .timeline-item {
      position: relative;
      padding-left: 50px;
      margin-bottom: 40px;
    }
    .timeline-item:last-child { margin-bottom: 0; }
    .timeline-dot {
      position: absolute;
      left: 14px;
      top: 5px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary-glow);
    }
    .timeline-year {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 5px;
    }
    .timeline-content h4 {
      font-size: 16px;
      margin-bottom: 8px;
      color: var(--silver);
    }
    .timeline-content p {
      color: var(--text-gray);
      font-size: 14px;
    }

    
    .site-footer {
      background: #111218;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px 0;
    }
    .footer-container {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      color: var(--text-gray);
      font-size: 14px;
      margin-top: 15px;
      line-height: 1.6;
    }
    .footer-links h4, .footer-tags h4, .footer-contact h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--silver);
      margin-bottom: 20px;
    }
    .footer-links ul { list-style: none; }
    .footer-links ul li { margin-bottom: 10px; }
    .footer-links ul li a { color: var(--text-gray); font-size: 14px; }
    .footer-links ul li a:hover { color: var(--primary); }
    .footer-tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .f-tag {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border-color);
      color: var(--text-gray);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
    }
    .f-tag:hover { border-color: var(--primary); color: var(--primary); }
    .footer-contact p { color: var(--text-gray); font-size: 14px; margin-bottom: 10px; }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.05);
      padding-top: 25px;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
    }

    
    @media (max-width: 991px) {
      .desktop-nav, .btn-download-top { display: none; }
      .drawer-trigger { display: flex; }
      .about-grid { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 576px) {
      .footer-container { grid-template-columns: 1fr; }
    }