/* 基础样式 */
body {
    font-family: Arial, sans-serif;
    background-color: #f0f8ff; /* 淡蓝色背景 */
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    padding: 0;
}

/* 容器样式 */
.container {
    max-width: 600px;
    margin: auto;
    padding: 20px;
    border: 1px solid #ccc;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 标题样式 */
h1 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 20px;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

th, td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: center;
}

th {
    background-color: #f2f2f2;
}

/* 按钮样式 */
button, .btn {
    display: block;
    margin: 20px auto;
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    border: none;
    text-decoration: none;
    font-size: 16px;
    text-align: center;
    transition: background-color 0.3s ease;
    cursor: pointer;
}

button:hover, .btn:hover {
    background-color: #45a049;
}

/* 按钮组 */
.button-group {
    display: flex;
    justify-content: space-around;
}

/* 居中显示 */
p {
    font-size: 18px;
    text-align: center;
    margin-bottom: 15px;
}