.ai-edu-news-popup {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 400px;
    max-width: 90%;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 10000;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    border: 1px solid #e0e0e0;
}

.ai-edu-news-popup-content {
    position: relative;
}

.ai-edu-news-popup-header {
    padding: 15px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 8px 8px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ai-edu-news-popup-header h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
}

.ai-edu-news-close {
    cursor: pointer;
    font-size: 24px;
    font-weight: bold;
    line-height: 1;
    padding: 0 5px;
}

.ai-edu-news-close:hover {
    opacity: 0.8;
}

.ai-edu-news-popup-body {
    max-height: 400px;
    overflow-y: auto;
    padding: 20px;
}

.ai-edu-news-popup-body ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ai-edu-news-popup-body li {
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f0f0f0;
}

.ai-edu-news-popup-body li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.ai-edu-news-popup-body a {
    color: #2b6cb0;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.4;
    display: block;
    margin-bottom: 5px;
}

.ai-edu-news-popup-body a:hover {
    color: #1a56db;
    text-decoration: underline;
}

.ai-edu-news-popup-body p {
    margin: 5px 0 0 0;
    font-size: 12px;
    color: #666;
    line-height: 1.4;
    font-style: italic;
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
    .ai-edu-news-popup {
        bottom: 10px;
        right: 10px;
        left: 10px;
        width: auto;
    }
    
    .ai-edu-news-popup-body {
        max-height: 300px;
        padding: 15px;
    }
}