body {
    font-family: 'Roboto', sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
}

.center-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    padding: 20px;
}

.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-top: 20px;
}
.center-button {
    text-align: center; /* 居中文本 */
}

.col-lg-6 {
    width: 100%; /* 设置宽度为100% */
    max-width: 1000px; /* 取消最大宽度限制 */
}


.form-control {
    width: 100%;
    max-width: 400px;
    margin-bottom: 20px;
    font-size: 30px;
}

.form-group {
    margin-bottom: 20px; /* 增加底边距 */
    width:100%; /* 设置宽度为100% */
}

.btn-primary {
    background-color: #97bae0;
    border-color: #000000;
    font-size: 20px; /* 增大字体大小 */
    padding: 10px 30px; /* 增大内边距 */
}
.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

.form-control {
    border-radius: 4px;
    border: 1px solid #ced4da;
}