html,body{
    height: 100%;
}
body{
    background-image: url("../image/cooperation_bg.png");
    background-repeat: no-repeat;
    min-width: 100% !important;
    position: relative;
    background-size: cover;
}
.cooperation{
    width: 900px;
    height: 578px;
    background: #FFFFFF;
    box-shadow: 0px 10px 20px rgba(7, 0, 45, 0.2);
    opacity: 1;
    border-radius: 24px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin: auto;
    transform: translate(-50%,-50%);
    overflow: hidden;
    display: flex;
}

.cooperation > div{
    width: 50%;
    color: #FFFFFF;
}

.cooperation > div:nth-child(1){
    background-image: url("../image/model_image.png");
    background-repeat: no-repeat;
    padding: 50px;
    width: calc(50% - 100px);
    height: calc(578px - 100px);
}

.cooperation > div:nth-child(2){
    width: calc(50% - 60px);
    height: calc(578px - 60px);
    padding: 30px;
}

.opacity80{
    opacity: 0.8;
}

.opacity60{
    opacity: 0.6;
}

.margin_top_20{
    margin-top: 20px;
}

.margin_top_27{
    margin-top: 20px;
}

.cooperation_form_title{
    font-size: 24px;
    font-family: Source Han Sans CN;
    font-weight: bold;
    line-height: 41px;
    color: #252631;
    opacity: 1;
}

.cooperation_form button{
    width: 380px;
    height: 50px;
    background: #3E6EF1;
    opacity: 1;
    border-radius: 45px;
    margin-top: 15px;
    color: #FFFFFF;
    border: none;
    cursor: pointer;
}

.cooperation_form > div{
    position: relative;
}

.cooperation_form input{
    border: none;
    padding: 15px;
    background-color: #F5F7FD;
    margin: 12px 0px;
    width: calc(380px - 20px - 16px);
    appearance: none;
}

.cooperation_form input:focus-visible{
    outline:none; 
}

.cooperation_form input::-webkit-input-placeholder{
    color: #A6B6C6;
}

.cooperation_form span{
    color: red;
    font-size: 12px;
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    display: none;
}
.popup{
    display: none;
}
.success-popup{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 140px;
    height: 40px;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.6);
    text-align: center;
    line-height: 40px;
    font-size: 18px;
    color: #fff;
    animation: popup-opacity 1.5s;
    opacity: 0;
}
@keyframes popup-opacity{
    form {
        opacity: 0;
    }
    to{
        opacity: 1;
    }
}