body { margin: 0; font-family: 'Roboto', sans-serif; line-height: 1.6; color: #333; background: linear-gradient(135deg, #eef2ff 0%, #ccdfff 100%); overflow-x: hidden; }
header { position: relative; height: 100vh; background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover, linear-gradient(rgba(255,255,255,0.8), rgba(255,255,255,0.8)); display: flex; align-items: center; justify-content: center; text-align: center; }
header h1 { font-size: 4rem; color: #333; text-shadow: 1px 1px 5px rgba(0,0,0,0.1); }
nav { position: fixed; top: 0; left: 0; width: 100%; background: rgba(255,255,255,0.9); box-shadow: 0 2px 10px rgba(0,0,0,0.1); z-index: 1000; }
nav ul { list-style: none; margin: 0; padding: 0; display: flex; justify-content: space-around; }
nav li { padding: 15px 20px; }
nav a { text-decoration: none; color: #555; font-weight: bold; transition: color 0.3s ease; }
nav a:hover { color: #8a2be2; }
.grid-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; padding: 20px; }
.card { background: #fff; border-radius: 10px; box-shadow: 0 4px 15px rgba(0,0,0,0.1); padding: 20px; transition: transform 0.3s ease, box-shadow 0.3s ease; }
.card:hover { transform: translateY(-5px); box-shadow: 0 8px 20px rgba(0,0,0,0.15); }
.card img { width: 100%; height: auto; border-radius: 10px 10px 0 0; }
.cta-button { display: inline-block; background: #ff9800; color: #fff; padding: 15px 30px; border-radius: 30px; font-size: 1rem; text-transform: uppercase; letter-spacing: 1px; transition: background 0.3s ease; }
.cta-button:hover { background: #e68a00; }
.parallax { background-attachment: fixed; background-position: center; background-repeat: no-repeat; background-size: cover; height: 500px; position: relative; }
.parallax:nth-of-type(1) { background-image: url('https://images.gptkong.com/demo/sample2.png'); }
.parallax:nth-of-type(2) { background-image: url('https://images.gptkong.com/demo/sample3.png'); }
@media (max-width: 768px) { header h1 { font-size: 2.5rem; } .grid-container { grid-template-columns: 1fr; } nav ul { flex-direction: column; } }
.loader { border: 8px solid #f3f3f3; border-top: 8px solid #8a2be2; border-radius: 50%; width: 60px; height: 60px; animation: spin 1s linear infinite; margin: 50px auto; display: none; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }