body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #dbe1e196; /* 背景 */
}

#登录卡片 {
    width: 230px;
    /* margin: 50px auto; */
    padding: 20px 30px 30px 30px;
    border: 1px solid #7a7d7d96; /* 边框 */
    background-color: #dceaeab9; /* 背景 */
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0,0,0,0.08);
    text-align: center;
    font-family: "Microsoft YaHei", sans-serif;
}
#登录卡片 p:first-child {
    font-size: 22px;
    font-weight: bold;
    margin: 0 0 20px 0;
    color: #333;
}
#登录卡片 form {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
#登录卡片 form input[type="text"],
#登录卡片 form input[type="password"] {
    width: 100%;
    padding: 8px 10px;
    margin: 4px 0 12px 0;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 14px;
}
#登录卡片 form input[type="submit"] {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    background-color: #3d79bac1;
    
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}
#登录卡片 form input[type="submit"]:hover {
    background-color: #225384c3;
}

#登录卡片 form input[type="text"]:focus,
#登录卡片 form input[type="password"]:focus {
    border-color: #5496b3;
    outline: none;
    box-shadow: 0 0 5px rgba(86, 159, 237, 0.58);
}
#提示 {
    margin-top: 16px;
    font-size: 14px;
    color: #888;
}