* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 15px;
}

.categories {
    display: flex;
    justify-content: space-between;
    background: #fff;
    padding: 15px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    overflow-x: auto;
}

.category {
    text-align: center;
    padding: 0 10px;
    white-space: nowrap;
}

.category a {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}

.category a:hover {
    color: #1E9FFF;
}

.main-content {
    display: flex;
    gap: 20px;
}

.qa-detail {
    flex: 1;
    background: #fff;
    padding: 20px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.sidebar {
    width: 300px;
}

.ranking-box {
    background: #fff;
    padding: 20px;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.ranking-box h3 {
    font-size: 16px;
    color: #333;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.ranking-list {
    list-style: none;
    padding: 0;
}

.ranking-list li {
    margin-bottom: 10px;
    padding: 8px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.ranking-list li:hover {
    background-color: #f5f5f5;
}

.ranking-list a {
    color: #666;
    text-decoration: none;
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.question {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.question-title {
    font-size: 20px;
    color: #333;
    margin-bottom: 15px;
}

.question-meta {
    font-size: 12px;
    color: #999;
    margin-bottom: 15px;
}

.question-content {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.answer {
    margin-bottom: 20px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 4px;
}

.answer-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.answer-author {
    font-weight: bold;
    color: #333;
}

.answer-time {
    color: #999;
    font-size: 12px;
}

.answer-content {
    color: #666;
    line-height: 1.8;
}

.back-link {
    margin-bottom: 20px;
    display: inline-block;
    color: #666;
    text-decoration: none;
}

.back-link:hover {
    color: #1E9FFF;
}

@media screen and (max-width: 768px) {
    .categories {
        flex-wrap: wrap;
    }
    .category {
        flex: 1;
        min-width: 120px;
    }
    .main-content {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
    }
}