/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif, Arial, Helvetica;
    background: linear-gradient(135deg, #e0e5ec 0%, #ffffff 100%);
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3 {
    font-weight: bold;
    color: #007BFF;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

p {
    font-size: 1rem;
    color: #444;
    margin-bottom: 1rem;
}

a {
    color: #0056b3;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #003d80;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.header {
    background: linear-gradient(to right, #007BFF, #0056b3);
    color: white;
    padding: 20px;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.module {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.module:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 10px rgba(0, 0, 0, 0.2);
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}

.image-grid img {
    width: 100%;
    height: auto;
    border-radius: 5px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.image-grid img:hover {
    transform: scale(1.1);
}

.code-block {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    margin: 1rem 0;
}

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

    h1 {
        font-size: 1.5rem;
    }

    .module {
        padding: 15px;
    }
}

.footer {
    background: linear-gradient(to left, #007BFF, #0056b3);
    color: white;
    text-align: center;
    padding: 10px;
    margin-top: auto;
}

.hidden {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease;
}

.show {
    opacity: 1;
    transform: translateY(0);
}