.sections{ width: 100%; position: relative;
    overflow: hidden;background: #fff;}
.sections img{ display: block; max-width: 100%;margin-top: -1px;}

.opt0{ opacity: 0;}

.section{ width: 71.9vw;margin: 0 auto;padding-bottom: 6.5vw; position: relative;}
.section1_title{position:relative;width: 100%;padding-top: 9.4vw;padding-bottom: 8.1vw;font-size: 3.1vw;font-weight: bold;text-align: center;}
.section1_des{position: relative;width: 100%;text-align: justify;font-size: 1vw;line-height:1.6;padding-bottom: 2.4vw;}
.section2_des{position: relative;width: 100%;text-align: justify;padding-top: 6.5vw;padding-bottom: 2.4vw;font-size: 1vw;line-height:1.6;}
.section3_des{position: relative;width: 100%;text-align: justify;padding-top: 6.5vw;padding-bottom: 2.4vw;font-size: 1vw;line-height:1.6;}

.msections{ width: 100%; position: relative; display: none;}
.msections img { display: block; width: 100%; }
@keyframes breath2{
    0%{ transform: scale(1); opacity: 0.2;}
    100%{ transform: scale(1); opacity:1;}
}

@media screen and (min-width: 1921px){
    .sections{width: 1920px;margin: 0 auto;}
    .section{ width: 1380px;margin: 0 auto;padding-bottom: 124px; position: relative;} .section1_title{position:relative;width: 100%;padding-top: 180px;padding-bottom: 155px;font-size: 59px;font-weight: bold;text-align: center;} .section1_des{position: relative;width: 100%;text-align: justify;font-size: 19px;line-height:1.6;padding-bottom: 46px;} .section2_des{position: relative;width: 100%;text-align: justify;padding-top: 124px;padding-bottom: 46px;font-size: 19px;line-height:1.6;} .section3_des{position: relative;width: 100%;text-align: justify;padding-top: 124px;padding-bottom: 46px;font-size: 19px;line-height:1.6;}
    .msections{ width: 100%; position: relative; display: none;} .msections img { display: block; width: 100%; }
}

@media screen and ( max-width : 800px){
    .msections{ display: block;overflow: hidden;background: #fff;}
    .sections{ display: none;}
    .section{ width: 100%;margin: 0 auto;padding-bottom: 0; position: relative;}
    .msection1_title{position: absolute;top:18.3vw;left:0;width: 100%;text-align: center;font-size: 7.3vw;}

    .msection1_des{position: absolute;top:40.1vw;left:50%;transform: translateX(-50%); width: 90.9%;text-align: justify;font-size: 3.7vw;line-height: 1.6;}
    .msection1_des span{font-weight: bold;}

    .msection2_des{position: absolute;top:17vw;left:50%;transform: translateX(-50%); width: 90.9%;text-align: justify;font-size: 3.7vw;line-height: 1.6;}
    .msection2_des span{font-weight: bold;}

    .msection3_des{position: absolute;top:17.7vw;left:50%;transform: translateX(-50%); width: 90.9%;text-align: justify;font-size: 3.7vw;line-height: 1.6;}
    .msection3_des span{font-weight: bold;}

}
@media screen and ( max-width : 320px){
    .msections{ display: block;}
    .sections{ display: none;}
}