body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #ffffff;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

form {
    background-color: rgba(255, 255, 255, 0.9);
    padding: 40px;  /* 增加内边距 */
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;  /* 增大表单框的最大宽度 */
    margin: auto;
    margin-top: 100px;
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}

li {
    margin-bottom: 20px;
}

div {
    display: flex;
    flex-direction: column;
}

div div {
    flex: 1;
    padding-top: 5px;
}

input[type="text"], input[type="password"] {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #1c6cb2;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background-color: #155a8c;
}

.error-message {
    color: red;
    font-size: 12px;
    height: 12px;
    margin-top: 5px;
}