/* 全局样式 */
body {
    margin: 0;
    font-family: 'Playfair Display', serif;
    background: linear-gradient(to bottom, #000000, #1a1a40);
    color: #d4af37;
    line-height: 1.6;
    overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 {
    font-family: 'Bebas Neue', sans-serif;
    text-shadow: 2px 2px 5px rgba(0, 255, 255, 0.5);
    margin-top: 0;
}
.container {
    max-width: 1200px;
    margin: auto;
    padding: 20px;
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}
.card {
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid #444;
    border-radius: 10px;
    padding: 20px;
    transition: transform 0.3s ease-in-out;
}
.card:hover {
    transform: scale(1.05);
}
.image-grid img {
    width: 100%;
    height: auto;
    border-radius: 10px;
}
.code-block {
    background: #1e1e1e;
    color: #00ffcc;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
}
.table-section table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}
.table-section th, .table-section td {
    border: 1px solid #444;
    padding: 10px;
    text-align: center;
}
.banner {
    position: relative;
    height: 400px;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
    color: white;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 10%, transparent 10.01%) center/10px 10px,
                radial-gradient(circle, rgba(255,255,255,0.3) 10%, transparent 10.01%) center/20px 20px;
    animation: move-bg 10s linear infinite;
}
@keyframes move-bg {
    from { transform: translate(0, 0); }
    to { transform: translate(-50%, -50%); }
}
.note {
    background: #1a1a40;
    color: #ffcc00;
    padding: 15px;
    border-left: 5px solid #d4af37;
    margin: 20px 0;
}
@media (max-width: 768px) {
    .banner {
        height: 300px;
    }
    .grid-container {
        grid-template-columns: 1fr;
    }
    .code-block {
        font-size: 14px;
    }
}