/* 全局样式 */
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(to right, #001f3f, #6a1a9e, #ff416c);
    color: #fff;
    line-height: 1.6;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
    color: #fff;
}
p {
    font-size: 16px;
    line-height: 1.8;
    margin: 1em 0;
}
a {
    color: #ffeb3b;
    text-decoration: none;
    transition: all 0.3s ease;
}
a:hover {
    color: #ff416c;
}
code {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}
pre {
    background: rgba(255, 255, 255, 0.05);
    padding: 1em;
    border-radius: 8px;
    overflow-x: auto;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 31, 63, 0.8);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
}
.nav a {
    margin: 0 10px;
    rel: "nofollow";
}
.cta-button {
    background: #ff416c;
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.cta-button:hover {
    background: #ffeb3b;
    color: #001f3f;
}
.hero {
    height: 100vh;
    background: url('https://images.gptkong.com/demo/sample1.png'), linear-gradient(to bottom, #001f3f, #6a1a9e);
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: white;
}
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}
.card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}
.card:hover {
    transform: translateY(-10px);
}
.footer {
    text-align: center;
    padding: 20px;
    background: rgba(0, 31, 63, 0.9);
}
@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
    }
    pre {
        font-size: 12px;
    }
}