:root {
      --primary-color: #1D7BFF;
      --primary-hover: #0056cc;
      --bg-dark: #0a1128;
      --bg-light: #f4f7fa;
      --bg-white: #ffffff;
      --text-dark: #0f172a;
      --text-gray: #475569;
      --text-light: #94a3b8;
      --border-color: rgba(226, 232, 240, 0.8);
      --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * { 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;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    
    
    .header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
    }
    .nav-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 16px 24px;
      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; }
    .logo span { font-size: 20px; font-weight: 800; color: var(--text-dark); white-space: nowrap; }
    .nav-desktop { display: flex; align-items: center; gap: 32px; }
    .nav-desktop a { font-size: 15px; font-weight: 500; color: var(--text-gray); padding: 6px 0; }
    .nav-desktop a:hover { color: var(--primary-color); }
    .nav-btn { background-color: var(--primary-color); color: #fff !important; padding: 10px 24px !important; border-radius: 8px; font-weight: 600 !important; }
    .nav-mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
    .nav-mobile-toggle span { display: block; width: 24px; height: 2px; background-color: var(--text-dark); margin: 5px 0; }

    .mobile-drawer { position: fixed; top: 0; left: -100%; width: 100%; height: 100%; z-index: 1000; transition: left 0.4s; display: flex; }
    .mobile-drawer.active { left: 0; }
    .drawer-backdrop { flex: 1; background: rgba(10, 17, 40, 0.6); backdrop-filter: blur(4px); }
    .drawer-content { width: 300px; background-color: var(--bg-white); height: 100%; padding: 24px; display: flex; flex-direction: column; }
    .drawer-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 40px; }
    .drawer-header .close-btn { background: none; border: none; font-size: 28px; cursor: pointer; }
    .drawer-nav { display: flex; flex-direction: column; gap: 20px; }
    .drawer-nav a { font-size: 16px; font-weight: 600; padding: 10px 0; border-bottom: 1px solid var(--border-color); }

    
    .banner {
      background: linear-gradient(135deg, #0a1128 0%, #1a2f64 100%);
      color: #fff;
      padding: 60px 24px;
      text-align: center;
    }
    .banner h1 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }

    .download-grid {
      max-width: 1200px;
      margin: 60px auto;
      padding: 0 24px;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .download-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .download-card:hover {
      border-color: var(--primary-color);
      transform: translateY(-4px);
    }
    .dl-header {
      display: flex;
      gap: 20px;
      margin-bottom: 24px;
    }
    .dl-icon {
      width: 60px;
      height: 60px;
      background: rgba(29, 123, 255, 0.1);
      color: var(--primary-color);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: bold;
    }
    .dl-title h3 {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 4px;
    }
    .dl-title span {
      font-size: 13px;
      color: var(--text-light);
    }
    .dl-desc {
      font-size: 14px;
      color: var(--text-gray);
      margin-bottom: 30px;
      line-height: 1.6;
    }
    .dl-action-btn {
      background-color: var(--primary-color);
      color: #fff;
      padding: 12px 24px;
      border-radius: 8px;
      text-align: center;
      font-weight: 700;
    }
    .dl-action-btn:hover {
      background-color: var(--primary-hover);
    }

    
    .flow-section {
      background: var(--bg-white);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 80px 24px;
    }
    .flow-container {
      max-width: 1200px;
      margin: 0 auto;
    }
    .section-title {
      text-align: center;
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 48px;
    }
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }
    .step-item {
      text-align: center;
      position: relative;
    }
    .step-item:not(:last-child)::after {
      content: '→';
      position: absolute;
      top: 30px;
      right: -20px;
      font-size: 24px;
      color: var(--primary-color);
    }
    .step-num {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      background: var(--bg-light);
      border: 2px solid var(--primary-color);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      margin: 0 auto 20px;
    }
    .step-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step-item p {
      font-size: 13px;
      color: var(--text-gray);
    }

    
    .footer { background-color: #050b1a; color: #a0aec0; border-top: 1px solid rgba(255, 255, 255, 0.05); padding: 80px 24px 30px; }
    .footer-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 60px; margin-bottom: 60px; }
    .footer-brand .logo span { color: #fff; }
    .footer-brand p { font-size: 14px; line-height: 1.6; margin-top: 20px; }
    .footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 20px; }
    .footer-col ul { list-style: none; }
    .footer-col ul li { margin-bottom: 12px; }
    .footer-col ul li a { font-size: 14px; }
    .footer-col ul li a:hover { color: #fff; }
    .footer-bottom { max-width: 1200px; margin: 0 auto; padding-top: 30px; border-top: 1px solid rgba(255, 255, 255, 0.05); display: flex; justify-content: space-between; align-items: center; font-size: 13px; }

    @media (max-width: 1024px) {
      .download-grid { grid-template-columns: 1fr; }
      .flow-steps { grid-template-columns: repeat(2, 1fr); gap: 40px; }
      .step-item:not(:last-child)::after { display: none; }
    }
    @media (max-width: 768px) {
      .nav-desktop { display: none; }
      .nav-mobile-toggle { display: block; }
      .flow-steps { grid-template-columns: 1fr; }
      .footer-container { grid-template-columns: 1fr; gap: 30px; }
    }