/* 全局样式 */
body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    background: linear-gradient(to bottom, #0A1F44, #000000);
    color: #FFFFFF;
    line-height: 1.6;
    letter-spacing: 0.5px;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: 'Roboto', sans-serif;
    font-weight: bold;
    color: #00FFFF;
    text-shadow: 0 0 8px rgba(0, 255, 255, 0.8);
}

p {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
}

a {
    color: #FF4500;
    text-decoration: none;
    transition: color 0.3s ease-in-out;
}

a:hover {
    color: #FFA500;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.module {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s ease-in-out;
}

.module:hover {
    transform: translateY(-5px);
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin-top: 10px;
}

pre {
    background-color: rgba(0, 0, 0, 0.7);
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
}

code {
    color: #00FFFF;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

section {
    margin-bottom: 40px;
}

.header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(to right, #0A1F44, #000000);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
    opacity: 0.1;
    z-index: -1;
}

.button {
    display: inline-block;
    background-color: #00FFFF;
    color: #000000;
    padding: 10px 20px;
    border-radius: 50px;
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.button:hover {
    background-color: #FF4500;
    color: #FFFFFF;
}

.footer {
    text-align: center;
    padding: 20px;
    background-color: #0A1F44;
    color: rgba(255, 255, 255, 0.7);
}

.node {
    position: relative;
    width: 20px;
    height: 20px;
    background-color: #00FFFF;
    border-radius: 50%;
    transition: all 0.3s ease-in-out;
}

.node:hover {
    animation: ripple 0.5s ease-in-out;
}

@keyframes ripple {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .header {
        padding: 30px 15px;
    }

    pre {
        font-size: 0.8rem;
    }
}