/* 全局样式 */
body {
    margin: 0;
    font-family: 'Roboto Mono', sans-serif;
    background: linear-gradient(135deg, #000F44, #3E078C);
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}
h1, h2, h3 {
    font-weight: bold;
    text-shadow: 0px 0px 10px rgba(0, 255, 255, 0.6);
}
p, li {
    font-size: 1rem;
    line-height: 1.8;
}
a {
    color: #00FFAA;
    text-decoration: none;
    transition: color 0.3s ease-in-out;
}
a:hover {
    color: #FF00FF;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.item {
    flex: 1 1 calc(33.333% - 20px);
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}
.item:hover {
    transform: translateY(-10px);
}
.code-block {
    background: #1E1E1E;
    color: #00FFAA;
    padding: 15px;
    border-radius: 5px;
    font-family: 'Courier New', monospace;
    overflow-x: auto;
}
.parallax {
    background-image: url('https://images.gptkong.com/demo/sample1.png');
    background-attachment: fixed;
    background-position: center;
    background-size: cover;
    height: 400px;
    position: relative;
}
.particle {
    position: absolute;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: move 5s infinite ease-in-out;
}
@keyframes move {
    0% { transform: translate(0, 0); }
    50% { transform: translate(50px, -50px); }
    100% { transform: translate(0, 0); }
}
@media (max-width: 768px) {
    .item {
        flex: 1 1 calc(50% - 20px);
    }
}
@media (max-width: 480px) {
    .item {
        flex: 1 1 100%;
    }
}