:root {
      --primary-color: #ff2d55;
      --secondary-color: #1c1c1e;
      --accent-color: #ff9500;
      --bg-color: #f5f6f9;
      --card-bg: rgb(255,255,255);
      --text-main: #1d1d1f;
      --text-muted: #86868b;
      --border-color: #e5e5ea;
      --max-width: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-color);
      color: var(--text-main);
      line-height: 1.6;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    a:hover {
      color: var(--primary-color);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .header {
      background-color: var(--card-bg);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .header-container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
      height: 70px;
      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: 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(--secondary-color);
      white-space: nowrap;
      letter-spacing: -0.5px;
    }
    .nav-desktop {
      display: flex;
      gap: 24px;
    }
    .nav-desktop a {
      font-weight: 600;
      font-size: 15px;
      color: var(--secondary-color);
      padding: 8px 0;
      position: relative;
    }
    .nav-desktop a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary-color);
      transition: width 0.2s ease;
    }
    .nav-desktop a:hover::after {
      width: 100%;
    }
    .menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--secondary-color);
    }

    
    .drawer-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: rgba(0,0,0,0.5);
      z-index: 998;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
    }
    .drawer-overlay.active {
      opacity: 1;
      visibility: visible;
    }
    .drawer {
      position: fixed;
      top: 0;
      left: -280px;
      width: 280px;
      height: 100%;
      background-color: var(--card-bg);
      z-index: 999;
      box-shadow: 2px 0 12px rgba(0,0,0,0.1);
      transition: left 0.3s ease;
      display: flex;
      flex-direction: column;
      padding: 20px;
    }
    .drawer.active {
      left: 0;
    }
    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 15px;
    }
    .drawer-close {
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
    }
    .drawer-nav {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .drawer-nav a {
      font-size: 16px;
      font-weight: 600;
      color: var(--secondary-color);
      padding: 10px 0;
      border-bottom: 1px solid var(--border-color);
    }

    
    .breadcrumbs-bar {
      max-width: var(--max-width);
      margin: 20px auto 10px auto;
      padding: 0 20px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .breadcrumbs-bar a:hover {
      color: var(--primary-color);
    }

    
    .download-container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 20px;
    }
    .download-hero {
      background-color: var(--card-bg);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      padding: 40px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      align-items: center;
      gap: 40px;
      margin-bottom: 30px;
      box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    }
    .download-info h1 {
      font-size: 32px;
      font-weight: 800;
      color: var(--secondary-color);
      margin-bottom: 15px;
    }
    .download-info p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 30px;
    }
    .download-actions {
      display: flex;
      gap: 15px;
      flex-wrap: wrap;
    }
    .btn-download {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background-color: var(--primary-color);
      color: #fff;
      padding: 12px 24px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 15px;
    }
    .btn-download:hover {
      background-color: var(--secondary-color);
      color: #fff;
    }
    .btn-secondary {
      background-color: var(--secondary-color);
    }
    .btn-secondary:hover {
      background-color: var(--primary-color);
    }
    .download-graphic {
      display: flex;
      justify-content: center;
    }
    .phone-mockup {
      width: 260px;
      height: 480px;
      border: 12px solid var(--secondary-color);
      border-radius: 36px;
      background-color: #fff;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      position: relative;
      box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    }
    .phone-screen {
      padding: 20px;
      display: flex;
      flex-direction: column;
      gap: 15px;
      height: 100%;
    }
    .phone-header {
      font-size: 14px;
      font-weight: 800;
      color: var(--primary-color);
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 10px;
      text-align: center;
    }
    .phone-item {
      height: 60px;
      background-color: var(--bg-color);
      border-radius: 6px;
      padding: 8px;
      display: flex;
      gap: 8px;
    }
    .phone-thumb {
      width: 44px;
      height: 44px;
      background-color: var(--border-color);
      border-radius: 4px;
    }
    .phone-lines {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1;
      justify-content: center;
    }
    .phone-line {
      height: 6px;
      background-color: var(--border-color);
      border-radius: 2px;
    }
    .phone-line:first-child { width: 80%; }
    .phone-line:last-child { width: 50%; }

    
    .steps-section {
      background-color: var(--card-bg);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      padding: 40px;
      margin-bottom: 30px;
    }
    .steps-section h2 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 25px;
      text-align: center;
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .step-card {
      text-align: center;
    }
    .step-num {
      width: 40px;
      height: 40px;
      background-color: var(--primary-color);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
      margin: 0 auto 15px auto;
    }
    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    
    .footer {
      background-color: var(--secondary-color);
      color: #fff;
      margin-top: 60px;
      border-top: 4px solid var(--primary-color);
    }
    .footer-container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 50px 20px 20px 20px;
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 40px;
    }
    .footer-brand {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }
    .footer-brand .logo span {
      color: #fff;
    }
    .footer-brand p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .footer-links-group {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .footer-title {
      font-size: 16px;
      font-weight: 700;
      position: relative;
      padding-bottom: 8px;
    }
    .footer-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 30px;
      height: 2px;
      background-color: var(--primary-color);
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
      color: #ccc;
    }
    .footer-links a:hover {
      color: var(--primary-color);
    }

    
    .friend-links {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 20px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    .friend-title {
      font-size: 14px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }
    .friend-content {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      font-size: 13px;
    }
    .friend-content a {
      color: #ccc;
      transition: color 0.2s;
    }
    .friend-content a:hover {
      color: var(--primary-color);
    }

    .footer-bottom {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 20px;
      text-align: center;
      font-size: 12px;
      color: var(--text-muted);
      border-top: 1px solid rgba(255,255,255,0.05);
    }

    
    @media (max-width: 768px) {
      .nav-desktop {
        display: none;
      }
      .menu-btn {
        display: block;
      }
      .download-hero {
        grid-template-columns: 1fr;
        padding: 20px;
      }
      .steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
      }
      .footer-container {
        grid-template-columns: 1fr;
        gap: 30px;
      }
    }