/* 全局样式定义 */
:root {
    --primary-color: #0f172a;
    --secondary-color: #4338ca;
    --accent-color-1: #6366f1;
    --accent-color-2: #facc15;
    --background-gradient: linear-gradient(135deg, #1e3a8a, #14b8a6);
    --text-color-light: #ffffff;
    --text-color-dark: #1f2937;
    --box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1), 0px 1px 3px rgba(0, 0, 0, 0.06);
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    letter-spacing: 0.5px;
    color: var(--text-color-dark);
    background: var(--background-gradient);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-weight: bold;
    color: var(--text-color-light);
}

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

.header {
    position: relative;
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, #1d4ed8, #14b8a6);
    color: var(--text-color-light);
    border-bottom-left-radius: 20px;
    border-bottom-right-radius: 20px;
    box-shadow: var(--box-shadow);
}

.header h1 {
    font-size: 2.5rem;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.header p {
    font-size: 1.2rem;
    margin-top: 10px;
}

.section {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 20px;
    box-shadow: var(--box-shadow);
}

.article-container {
    grid-column: span 2;
    background: #ffffff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: var(--box-shadow);
}

.article-container h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.article-container pre {
    background: #f3f4f6;
    border-radius: 8px;
    padding: 15px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    color: #374151;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.gallery img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    object-fit: cover;
    transition: transform 0.3s ease-in-out;
}

.gallery img:hover {
    transform: scale(1.1);
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }

    .container {
        grid-template-columns: 1fr;
    }

    .article-container {
        grid-column: span 1;
    }
}

@media (max-width: 400px) {
    body {
        font-size: 14px;
    }

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

    .gallery img {
        width: 100px;
        height: 100px;
    }
}

.gradient-button {
    background: linear-gradient(135deg, var(--accent-color-1), var(--accent-color-2));
    color: var(--text-color-light);
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.gradient-button:hover {
    background: linear-gradient(135deg, var(--accent-color-2), var(--accent-color-1));
}