body, html {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    color: #fff;
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    overflow-x: hidden;
    min-height: 100vh;
}
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}
header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}
header nav .logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #ff9f1c;
    text-transform: uppercase;
}
header nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}
header nav ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s ease;
}
header nav ul li a:hover {
    color: #ff9f1c;
}
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle, rgba(34, 193, 195, 0.8), transparent), url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.hero h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}
.hero p {
    font-size: 1.2rem;
    line-height: 1.6;
    max-width: 600px;
    margin-bottom: 2rem;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.1), transparent);
    animation: flow 10s infinite linear;
}
@keyframes flow {
    0% { transform: translateX(-50%); }
    100% { transform: translateX(0); }
}
.content {
    padding: 6rem 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
}
.card:hover {
    transform: translateY(-10px);
}
.card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 1rem;
}
.card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}
.card p {
    font-size: 1rem;
    line-height: 1.6;
}
.code-block {
    background: #1e1e1e;
    color: #ff9f1c;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    margin: 1rem 0;
}
footer {
    background: #0f2027;
    color: #fff;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    header nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }
}