/* 全局样式与色彩定义 */
body {
    font-family: 'Open Sans', sans-serif;
    background: linear-gradient(135deg, #0A192F, #6C5CE7);
    color: #E0E0E0;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    overflow-x: hidden;
}
h1, h2, h3 {
    font-family: 'Poppins', sans-serif;
    color: #6C5CE7;
    margin-top: 2rem;
}
p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
}
a {
    color: #FF6B6B;
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover {
    color: #4ECDC4;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
.header {
    text-align: center;
    padding: 50px 0;
    background: linear-gradient(45deg, #0A192F, #4ECDC4);
    color: #E0E0E0;
}
.header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 20px;
}
.card {
    background: #0A192F;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}
.card:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}
.card img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    margin-bottom: 10px;
}
.card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}
.card p {
    font-size: 0.9rem;
    color: #E0E0E0;
}
.code-block {
    background: #0A192F;
    color: #4ECDC4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    margin: 20px 0;
}
@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr;
    }
    .header h1 {
        font-size: 2rem;
    }
}
@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}