/* 全局样式设置 */
:root {
    --main-bg-color: #121212;
    --accent-blue: #1E90FF;
    --accent-green: #00FF7F;
    --secondary-gray: #2C2C2C;
    --dark-purple: #3A3A5A;
    --font-primary: 'Roboto', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-secondary);
    background: linear-gradient(135deg, var(--main-bg-color), var(--dark-purple));
    color: white;
    line-height: 1.6;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.header {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    padding: 20px;
    text-align: center;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.header h1 {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    margin: 0;
}

.navbar {
    display: flex;
    justify-content: space-around;
    background: var(--secondary-gray);
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.navbar a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.navbar a:hover {
    color: var(--accent-blue);
}

.card {
    background: var(--secondary-gray);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

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

.button {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 4px;
    transition: transform 0.3s ease;
}

.button:hover {
    transform: scale(1.1);
}

pre {
    background: #2C2C2C;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
}

code {
    color: var(--accent-green);
    font-family: 'Courier New', Courier, monospace;
}

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

    .header h1 {
        font-size: 2rem;
    }

    pre {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .navbar {
        flex-direction: column;
        gap: 10px;
    }

    .header h1 {
        font-size: 1.8rem;
    }
}

.footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: #aaa;
}