body {
    font-family: 'Roboto', sans-serif;
    background-image: url('../bj.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    margin: 0;
    padding: 30px;
    background-color: #f9f9f9;
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
}

.mask {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.5);
    z-index: -1;
}

h2 {
    color: #2c3e50;
    border-bottom: 2px solid #bdc3c7;
    padding-bottom: 10px;
    margin-top: 0;
}

p {
    font-size: 16px;
    margin-bottom: 20px;
}

table {
    border-collapse: collapse;
    width: 100%;
    max-width: 600px; /* 修改此处调整表格最大宽度 */
    background-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

table th,
table td {
    border: 1px solid #e0e0e0;
    padding: 12px 15px;
    text-align: left;
}

table th {
    background-color: #2c3e50;
    color: white;
    font-weight: 700;
}

table tr:nth-child(even) {
    background-color: #f5f5f5;
}

button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    margin: 5px;
    transition: background-color 0.3s ease;
}

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