* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: Arial, sans-serif; line-height: 1.6; color: #333; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
header { background: #fff; box-shadow: 0 2px 5px rgba(0,0,0,0.1); position: fixed; width: 100%; top: 0; z-index: 1000; }
header .container { display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; }
.logo { font-size: 24px; font-weight: bold; color: #0066cc; }
nav ul { display: flex; list-style: none; gap: 30px; }
nav a { text-decoration: none; color: #333; }
.phone { color: #0066cc; font-weight: bold; }
.banner { background: linear-gradient(135deg, #0066cc, #003366); color: #fff; padding: 150px 20px 100px; text-align: center; }
.banner h1 { font-size: 48px; margin-bottom: 20px; }
.banner p { font-size: 20px; margin-bottom: 30px; }
.btn { display: inline-block; background: #fff; color: #0066cc; padding: 15px 30px; text-decoration: none; border-radius: 5px; font-weight: bold; }
.about, .products { padding: 80px 0; }
.about h2, .products h2 { text-align: center; margin-bottom: 40px; font-size: 36px; }
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.product-card { background: #f9f9f9; padding: 30px; border-radius: 10px; text-align: center; }
.product-card h3 { color: #0066cc; margin-bottom: 15px; }
footer { background: #333; color: #fff; padding: 40px 0; text-align: center; }
#ai-chat-widget { position: fixed; bottom: 20px; right: 20px; z-index: 9999; }
.chat-toggle { background: #0066cc; color: #fff; padding: 15px 20px; border-radius: 30px; cursor: pointer; box-shadow: 0 4px 10px rgba(0,0,0,0.2); }
.chat-window { display: none; position: absolute; bottom: 60px; right: 0; width: 350px; height: 400px; background: #fff; border-radius: 10px; box-shadow: 0 4px 20px rgba(0,0,0,0.2); overflow: hidden; }
.chat-window.active { display: flex; flex-direction: column; }
.chat-header { background: #0066cc; color: #fff; padding: 15px; display: flex; justify-content: space-between; }
.chat-messages { flex: 1; padding: 15px; overflow-y: auto; }
.chat-input { padding: 15px; border-top: 1px solid #eee; display: flex; }
.chat-input input { flex: 1; padding: 10px; border: 1px solid #ddd; border-radius: 5px; }
.chat-input button { background: #0066cc; color: #fff; border: none; padding: 10px 20px; margin-left: 10px; border-radius: 5px; cursor: pointer; }