body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #f5f5f5;
    font-family: 'Microsoft YaHei', sans-serif;
}

.login-container {
    width: 90%;
    max-width: 400px;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

input {
    width: 100%;
    height: 45px;
    padding: 0 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    box-sizing: border-box;
}

    input:focus {
        border-color: #0CAF50; /* #007bff; */
        outline: none;
    }

.code-group {
    display: flex;
    gap: 10px;
}



.code-btn {
    width: 100px;
    background: #0CAF50; /* #007bff; */
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    flex-shrink: 0;
}

    .code-btn:disabled {
        background: #cccccc;
        cursor: not-allowed;
    }

.submit-btn {
    width: 100%;
    height: 45px;
    background: #0CAF50; /* #007bff; */
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

    .submit-btn:hover, .code-btn:hover {
        opacity: 0.9;
    }

.error-msg {
    color: #dc3545;
    font-size: 14px;
    position: absolute;
    bottom: -20px;
    left: 0;
    display: none;
}