/* 全局样式设置 */
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #ffffff;
    background: linear-gradient(to bottom, #1e0066, #7400b8);
    overflow-x: hidden;
}
h1, h2, h3 {
    font-family: 'Orbitron', sans-serif;
    font-weight: bold;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.5);
}
a {
    color: #3be25c;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px;
}
.grid-item {
    background-color: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 20px;
    text-align: center;
    color: #333333;
}
.button {
    background-color: #3be25c;
    color: white;
    border: none;
    padding: 10px 20px;
    font-family: 'Orbitron', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
}
.button:hover {
    transform: scale(1.1);
}
.parallax-background {
    background-image: url('https://images.gptkong.com/demo/sample1.png');
    background-attachment: fixed;
    background-size: cover;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.8);
}
.parallax-foreground {
    background-color: rgba(255, 255, 255, 0.8);
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333333;
}
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin: 20px 0;
}
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    color: #ffffff;
}
th, td {
    border: 1px solid #ffffff;
    padding: 10px;
    text-align: left;
}
th {
    background-color: #3be25c;
    color: #000000;
}
code {
    display: block;
    background-color: #1e0066;
    color: #ffffff;
    padding: 10px;
    border-radius: 5px;
    font-family: 'Courier New', Courier, monospace;
    overflow-x: auto;
}
@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
    .parallax-background {
        height: 300px;
    }
    .parallax-foreground {
        height: 200px;
    }
}