:root {
    --theme-color: #1a73e8;
    --theme-light: #e8f0fe;
    --theme-hover: #1557b0;
    --border-color: #eaeaea;
    --text-primary: #333333;
    --text-secondary: #666666;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
}

.article-container {
    max-width: 900px;
    margin: 0 auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
}

.content-box {
    background: var(--bg-primary);
    padding: 30px;
    border-radius: var(--radius-md);
    margin: 20px 0;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.section {
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.section-header {
    font-size: 18px;
    color: var(--theme-color);
    margin-bottom: 20px;
    padding-left: 15px;
    border-left: 4px solid var(--theme-color);
    font-weight: 600;
    display: flex;
    align-items: center;
}

.info-item {
    margin: 12px 0;
    color: var(--text-primary);
    line-height: 1.8;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.info-label {
    color: var(--text-secondary);
    margin-right: 15px;
    min-width: 90px;
    font-weight: 500;
}

.intro-text {
    line-height: 1.8;
    color: var(--text-primary);
    text-align: justify;
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: var(--radius-sm);
    margin: 10px 0;
}

.download-box {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: var(--radius-sm);
    margin: 15px 0;
    transition: all 0.3s ease;
}

.download-box:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.download-link {
    color: var(--theme-color);
    text-decoration: none;
    word-break: break-all;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    transition: color 0.3s ease;
}

.download-link:hover {
    color: var(--theme-hover);
}

.extract-code {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 15px;
    background: var(--theme-light);
    color: var(--theme-color);
    border-radius: var(--radius-sm);
    font-family: Consolas, monospace;
    font-weight: 500;
}

.resource-image {
    width: auto;
    max-width: 95%;
    transform: scale(0.9);
    margin: 20px auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
    display: block;
}

.resource-image:hover {
    transform: scale(0.92);
}

.update-time {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    background: var(--theme-light);
    color: var(--theme-color);
    border-radius: 20px;
    font-size: 14px;
    margin-left: 10px;
}

.time-icon {
    margin-right: 6px;
    font-size: 16px;
}

@media (max-width: 768px) {
    .content-box {
        padding: 20px;
        margin: 15px 0;
    }
    
    .section-header {
        font-size: 16px;
        margin-bottom: 15px;
    }
    
    .info-item {
        margin: 8px 0;
    }
    
    .info-label {
        min-width: 80px;
    }
    
    .download-box {
        padding: 15px;
    }

    .download-box .info-item {
        display: block;
    }

    .download-box .info-label {
        min-width: auto;
        margin-bottom: 5px;
        display: block;
    }

    .download-link {
        display: block;
        margin-top: 5px;
        line-height: 1.5;
        font-size: 14px;
    }
}