body, html { margin: 0; padding: 0; font-family: 'Roboto', sans-serif; overflow-x: hidden; color: #333; line-height: 1.6; }
header { position: fixed; top: 0; width: 100%; background: rgba(26, 35, 126, 0.9); z-index: 1000; transition: all 0.3s ease; }
header.scrolled { background: rgba(26, 35, 126, 1); box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2); }
header .container { display: flex; justify-content: space-between; align-items: center; padding: 15px 20px; max-width: 1200px; margin: auto; }
header .logo { color: white; font-size: 24px; font-weight: bold; text-decoration: none; }
header nav { display: none; }
header nav.active { display: block; }
header nav ul { list-style: none; display: flex; }
header nav ul li { margin-left: 20px; }
header nav ul li a { color: white; text-decoration: none; font-size: 16px; transition: color 0.3s ease; }
header nav ul li a:hover { color: #6f38c4; }
.menu-toggle { display: none; cursor: pointer; color: white; font-size: 24px; }
@media (max-width: 768px) { header nav { display: none; } header nav.active { display: block; position: absolute; top: 60px; right: 20px; background: rgba(26, 35, 126, 0.9); padding: 10px 20px; border-radius: 5px; } header nav ul { flex-direction: column; } header nav ul li { margin: 10px 0; } .menu-toggle { display: block; } }
.hero { height: 100vh; background: linear-gradient(135deg, #1a237e, #6f38c4); color: white; display: flex; justify-content: center; align-items: center; text-align: center; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: 0; left: 0; width: 200%; height: 100%; background: url('https://images.gptkong.com/demo/sample1.png') repeat-x; animation: flow 20s linear infinite; }
@keyframes flow { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.hero h1 { font-size: 48px; margin-bottom: 20px; }
.hero p { font-size: 18px; max-width: 600px; }
.cta-button { display: inline-block; background: white; color: #1a237e; padding: 15px 30px; border-radius: 30px; text-decoration: none; font-size: 18px; transition: all 0.3s ease; }
.cta-button:hover { background: #6f38c4; color: white; transform: scale(1.1); }
.section { padding: 80px 20px; text-align: center; }
.section:nth-child(even) { background: #f9f9f9; }
.section-title { font-size: 36px; margin-bottom: 40px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
.card { background: white; padding: 20px; border-radius: 10px; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); transition: all 0.3s ease; }
.card:hover { transform: translateY(-10px); box-shadow: 0 6px 10px rgba(0, 0, 0, 0.2); }
.card img { width: 100%; height: auto; border-radius: 10px; margin-bottom: 15px; }
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { font-size: 16px; color: #666; }
.parallax { height: 500px; background-attachment: fixed; background-position: center; background-repeat: no-repeat; background-size: cover; 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'); }
.parallax::after { content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 100px; background: linear-gradient(to top, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0)); }
footer { background: #1a237e; color: white; padding: 40px 20px; text-align: center; }
footer p { font-size: 14px; }
@media (max-width: 768px) { .hero h1 { font-size: 36px; } .section-title { font-size: 28px; } }