:root {
      --primary: #1D7BFF;
      --primary-hover: #0a66e6;
      --primary-glow: rgba(29, 123, 255, 0.4);
      --bg-dark: #0B0F19;
      --bg-card: #111827;
      --bg-light: #F9FAFB;
      --text-dark: #111827;
      --text-muted: #6B7280;
      --text-light: #F3F4F6;
      --border-dark: rgba(255, 255, 255, 0.1);
      --border-light: #E5E7EB;
      --theme-color: rgb(0,0,0);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-dark);
      background-color: var(--bg-light);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dark);
    }

    .header-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .logo img {
      display: block;
      height: 38px;
      width: auto;
      max-width: 160px;
      object-fit: contain;
      flex-shrink: 0;
    }
    .logo span {
      display: inline-block;
      font-size: 18px;
      font-weight: 800;
      line-height: 1;
      color: #ffffff;
      white-space: nowrap;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-menu a {
      color: rgba(255, 255, 255, 0.8);
      font-size: 15px;
      font-weight: 500;
    }

    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, #1D7BFF, #0052D4);
      color: #fff;
      border: none;
      box-shadow: 0 4px 14px var(--primary-glow);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(29, 123, 255, 0.6);
    }

    .btn-outline {
      background: transparent;
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.3);
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #fff;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: #fff;
      cursor: pointer;
    }

    
    .drawer-backdrop {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(0, 0, 0, 0.6);
      backdrop-filter: blur(4px);
      z-index: 1999;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
    }

    .drawer-backdrop.active {
      opacity: 1;
      visibility: visible;
    }

    .drawer {
      position: fixed;
      top: 0;
      left: -300px;
      width: 300px;
      height: 100vh;
      background: var(--bg-dark);
      z-index: 2000;
      box-shadow: 4px 0 24px rgba(0,0,0,0.5);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      padding: 24px;
    }

    .drawer.active {
      left: 0;
    }

    .drawer-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 40px;
      border-bottom: 1px solid var(--border-dark);
      padding-bottom: 20px;
    }

    .drawer-close {
      background: none;
      border: none;
      color: #fff;
      font-size: 28px;
      cursor: pointer;
    }

    .drawer-nav {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .drawer-nav a {
      color: rgba(255, 255, 255, 0.8);
      font-size: 16px;
      font-weight: 500;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .drawer-nav a:hover {
      color: var(--primary);
      padding-left: 6px;
    }

    
    .banner-area {
      background-color: var(--bg-dark);
      padding: 140px 20px 80px 20px;
      text-align: center;
      color: #FFF;
      border-bottom: 1px solid var(--border-dark);
    }

    .breadcrumbs {
      max-width: 1200px;
      margin: 0 auto 15px auto;
      font-size: 13px;
      color: #9CA3AF;
      text-align: left;
    }

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

    .banner-title {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .banner-desc {
      font-size: 15px;
      color: #9CA3AF;
      max-width: 600px;
      margin: 0 auto;
    }

    
    .download-grid {
      max-width: 1200px;
      margin: 60px auto;
      padding: 0 20px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .download-box {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .download-box h2 {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 15px;
    }

    .download-box p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 30px;
    }

    .platform-links {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 15px;
    }

    .platform-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 14px;
      border-radius: 8px;
      background: var(--bg-light);
      border: 1px solid var(--border-light);
      font-weight: 600;
      font-size: 14px;
    }

    .platform-btn:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .platform-btn svg {
      width: 20px;
      height: 20px;
    }

    .guide-box {
      max-width: 1200px;
      margin: 0 auto 80px auto;
      padding: 0 20px;
    }

    .guide-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: 12px;
      padding: 40px;
    }

    .guide-card h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 30px;
      border-bottom: 1px solid var(--border-light);
      padding-bottom: 15px;
    }

    .guide-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .guide-item {
      display: flex;
      gap: 15px;
    }

    .guide-idx {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      flex-shrink: 0;
    }

    .guide-text h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .guide-text p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    
    .footer {
      background-color: #0B0F19;
      color: #9CA3AF;
      border-top: 1px solid var(--border-dark);
      font-size: 14px;
    }

    .footer-top {
      max-width: 1200px;
      margin: 0 auto;
      padding: 80px 20px 40px 20px;
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
    }

    .footer-brand {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .footer-brand .logo span {
      color: #ffffff;
    }

    .footer-brand p {
      line-height: 1.6;
    }

    .footer-links h4 {
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 24px;
    }

    .footer-links ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-dark);
      padding: 30px 20px;
      text-align: center;
    }

    .footer-bottom-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-copyright {
      font-size: 13px;
    }

    .footer-legal-links {
      display: flex;
      gap: 20px;
      font-size: 13px;
    }

    @media (max-width: 991px) {
      .download-grid {
        grid-template-columns: 1fr;
      }
      .guide-list {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu, .header-actions {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom-container {
        flex-direction: column;
        text-align: center;
      }
    }