body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, sans-serif;
}

.login-container {
    display: flex;
    height: 100%;
}

.login-img, .login-form,.zhuce-img {
    flex: 1;
    width: 50%;
}

.login-img {
    background: url('http://www.pfscv.com/picCliente/251a51b5-ca58-4cee-a15b-2fbd684094e71000x.png') center center no-repeat;
    background-size: contain;
}
.zhuce-img {
    background: url('http://www.pfscv.com/picCliente/e6db5491-7b4b-42c7-b761-6ea06634f5571000x.png') center center no-repeat;
    background-size: contain;
}
.login-form {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

form {
    width: 100%;
    max-width: 300px;
}

input[type=text], input[type=password] {
    width: 100%;
    padding: 15px;
    margin: 5px 0 22px 0;
    border: none;
    background: #f1f1f1;
}

    input[type=text]:focus, input[type=password]:focus {
        background-color: #ddd;
        outline: none;
    }

.btn {
    background-color: #4CAF50;
    color: white;
    padding: 14px 20px;
    border: none;
    cursor: pointer;
    width: 100%;
    opacity: 0.9;
}

    .btn:hover {
        opacity: 1;
    }

@media screen and (max-width: 768px) {
    .login-container {
        flex-direction: column;
    }

    .login-img, .login-form,.zhuce-img {
        width: 100%;
    }
}