*{
    padding: 0;
    margin:0;
    box-sizing: border-box;
    font-family: 'Poppins',sans-serif;
}

/* 设置整个表单参数 (父盒子)*/

section {
    position: relative;
    min-height: 100vh;
    background-image:url(1.jpg);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

section .container {
    position: relative;
    width: 550px;
    height: 350px;
    background: rgb(17, 168, 168);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

section .container .user{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
}

/* 更改图片  （左侧）*/
section .container .imgBx{
    position: relative;
    width: 50%;
    height: 100%;
    /* background: #fff; */
    transition: .5s;
}

section .container .user .imgBx img{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 右侧表单盒子 */

section .container .user .formBx {
    position: relative;
    width: 50%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
    transition: .5s;
}

/* h2 */

section .container .user .formBx form h2{
    font-size: 18px;
    font-weight: 600;
    text-transform: uppercase;/*大小*/
    letter-spacing: 2px;/* 间距*/
    text-align: center;
    width: 100%;
    margin-bottom: 10px;
    color: #555;
}

/* 表单文字属性 */

section .container .user .formBx form input{
    position: relative;
    width: 100%;
    padding: 10px;
    background: #f5f5f5;
    color: #333;
    border: none;
    outline:none;
    box-shadow:none;
    margin: 8px 0;
    font-size: 14px;
    letter-spacing:1px;
    font-weight: 300;
}

/* 为登录设置样式 */

section .container .user .formBx form input[type="submit"]{
    max-width: 100px;
    background: #677eff;
    color:#fff;
    cursor:pointer;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    transition: .5s;
} 

/* 没有账号时 */

section .container .user .formBx form .signup{
    position: relative;
    margin-top: 20px;
    font-size: 12px;
    letter-spacing: 1px;
    color: #555;
    text-transform: uppercase;
    font-weight: 300;
}

section .container .user .formBx form .signup a{
    font-weight: 600;
    text-decoration: none;
    color: #677eff;
}
section .container .singupBx {
    pointer-events: none;
}

section .container.active .singupBx {
    pointer-events: initial;
}

section .container .singupBx .formBx {
    left: 100%;
}

section .container.active .singupBx .formBx {
    left: 0;
}

section .container .singupBx .imgBx {
    left: -100%;
}

section .container.active .singupBx .imgBx {
    left: 0;
}


section .container .singinBx .formBx {
    left: 0;
}

section .container.active .singinBx .formBx {
    left: 100%;
}

section .container .singinBx .imgBx {
    left: 0;
}

section .container.active .singinBx .imgBx {
    left: 100%;
}

@media (max-width: 991px) {
    section .container {
        max-width: 400px;
    }

    section .container .imgBx {
        display: none;
    }

    section .container .user .formBx {
        width: none;
    }
}