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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    padding: 20px;
    background-color: #f9f9f9;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.article {
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 10px;
}

.article-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.article-header h2 {
    font-size: 18px;
    margin-bottom: 5px;
}

.article-header p {
    font-size: 12px;
    color: #999;
}

.article-content {
    font-size: 14px;
    margin-top: 10px;
    margin-bottom: 5px;
    white-space: pre-wrap; /* 保证内容换行 */
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    max-height: 2em; /* 设置初始最大高度，只显示一行内容 */
}

.article-content.expanded {
    max-height: none; /* 展开后取消高度限制 */
    overflow: visible;
}

button.toggle-content {
    font-size: 12px;
    color: #007bff;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px 0;
}

button.toggle-content:hover {
    text-decoration: underline;
}