:root {
      --primary-color: rgb(47,54,64);
      --glacier-blue: #1D7BFF;
      --deep-sea-ink: #0B192C;
      --silver-white: #F8FAFC;
      --text-dark: #1E293B;
      --text-light: #64748B;
      --border-color: #E2E8F0;
      --glass-bg: rgba(255, 255, 255, 0.85);
      --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

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

    body {
      font-family: var(--font-sans);
      color: var(--text-dark);
      background-color: #F1F5F9;
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    
    .site-header {
      background-color: var(--primary-color);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 2px 10px rgba(0,0,0,0.1);
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .header-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 15px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }

    .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: #FFF;
      white-space: nowrap;
    }

    .desktop-nav {
      display: flex;
      gap: 25px;
    }

    .desktop-nav a {
      color: rgba(255, 255, 255, 0.85);
      font-size: 15px;
      font-weight: 500;
    }

    .desktop-nav a:hover {
      color: var(--glacier-blue);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: 6px;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.3s;
      border: none;
    }

    .btn-primary {
      background-color: var(--glacier-blue);
      color: #fff;
    }

    .btn-primary:hover {
      background-color: #1062D4;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(29, 123, 255, 0.3);
    }

    .btn-primary-nav {
      background-color: transparent;
      color: #fff;
      border: 1.5px solid var(--glacier-blue);
    }

    .btn-primary-nav:hover {
      background-color: var(--glacier-blue);
    }

    .drawer-trigger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 5px;
    }

    .drawer-trigger span {
      display: block;
      width: 24px;
      height: 2.5px;
      background-color: #FFF;
      border-radius: 2px;
      transition: 0.3s;
    }

    
    .drawer-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.6);
      z-index: 998;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .drawer-overlay.active {
      opacity: 1;
      pointer-events: auto;
    }

    .drawer-menu {
      position: fixed;
      top: 0;
      left: -320px;
      width: 300px;
      height: 100%;
      background-color: var(--primary-color);
      z-index: 999;
      box-shadow: 5px 0 25px rgba(0,0,0,0.3);
      transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      display: flex;
      flex-direction: column;
      padding: 20px;
    }

    .drawer-menu.active {
      left: 0;
    }

    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 15px;
    }

    .drawer-close {
      background: none;
      border: none;
      color: #FFF;
      font-size: 30px;
      cursor: pointer;
    }

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

    .drawer-nav a {
      color: #FFF;
      font-size: 16px;
      font-weight: 500;
    }

    
    .dl-banner {
      background: linear-gradient(135deg, var(--deep-sea-ink) 0%, var(--primary-color) 100%);
      color: #FFF;
      padding: 80px 20px;
      text-align: center;
    }

    .dl-section {
      padding: 80px 20px;
    }

    .dl-container {
      max-width: 1100px;
      margin: 0 auto;
    }

    .platform-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: 40px;
    }

    .platform-card {
      background-color: #FFF;
      border-radius: 12px;
      padding: 40px 30px;
      text-align: center;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .platform-icon {
      font-size: 50px;
      color: var(--glacier-blue);
      margin-bottom: 20px;
    }

    .platform-card h3 {
      font-size: 20px;
      color: var(--primary-color);
      margin-bottom: 15px;
    }

    .platform-card p {
      font-size: 14px;
      color: var(--text-light);
      margin-bottom: 30px;
      line-height: 1.5;
    }

    .platform-card .btn {
      width: 100%;
      margin-top: auto;
    }

    
    .dl-guide-card {
      background-color: #FFF;
      border-radius: 12px;
      padding: 40px;
      box-shadow: var(--card-shadow);
      border: 1px solid var(--border-color);
      margin-top: 50px;
    }

    .dl-guide-card h2 {
      font-size: 24px;
      color: var(--primary-color);
      margin-bottom: 25px;
      text-align: center;
    }

    .guide-steps-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .guide-step {
      text-align: center;
    }

    .guide-step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background-color: var(--glacier-blue);
      color: #FFF;
      font-weight: bold;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 15px;
    }

    .guide-step h4 {
      font-size: 15px;
      color: var(--primary-color);
      margin-bottom: 8px;
    }

    .guide-step p {
      font-size: 12.5px;
      color: var(--text-light);
    }

    
    .site-footer {
      background-color: #0F172A;
      color: #94A3B8;
      font-size: 14px;
      border-top: 1px solid rgba(255,255,255,0.05);
    }

    .footer-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 60px 20px 40px 20px;
      display: grid;
      grid-template-columns: 1.2fr repeat(3, 1fr);
      gap: 40px;
    }

    .footer-brand .logo {
      margin-bottom: 20px;
    }

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

    .footer-group h3 {
      color: #F8FAFC;
      font-size: 15px;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-group ul {
      list-style: none;
    }

    .footer-group ul li {
      margin-bottom: 12px;
    }

    .footer-group ul li a:hover {
      color: var(--glacier-blue);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.05);
      padding: 30px 20px;
    }

    .footer-bottom-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    @media (max-width: 991px) {
      .platform-cards-grid {
        grid-template-columns: 1fr;
      }
      .guide-steps-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
    }

    @media (max-width: 768px) {
      .desktop-nav, .header-actions .btn {
        display: none;
      }
      .drawer-trigger {
        display: flex;
      }
      .guide-steps-list {
        grid-template-columns: 1fr;
      }
    }