.contact_form .item .form_tit{width:100px;}
.contact_form .item .tips{left:120px!important;}
.about_box1 .tit,.about_box1 .txt{letter-spacing: 0;}
.service_box .item{max-width:25%;padding:0 20px;}
.service_box.wrap{width:1400px;}
.screen_list1 .item{width:128px;padding:8px 10px;margin-right: 7px;}
.library_ban .item{margin-left:1.5%;margin-right: 1.5%;}
.platform_blocks .item{width:148px;margin:0 5px 20px;font-size: 11px;}
.screen_box2>.txt,.screen_box3>.txt{min-height: 3em;}
.screen_list2 .item .txt{min-height: 4.5em;}
.screen_list3 .item{padding-top:20px;}
.survey_blocks .items>.txt{min-height: 3em;}
.survey_list .item .stit{padding:0 15px;}
@media only screen and (max-width: 1200px) {
    .service_box.wrap{width:100%;}
    .service_box .item{max-width:100%;width:50%;padding:0 20px;}
}
@media only screen and (max-width: 640px) {
    .contact_form .item .form_tit {width: 100px;}
    .contact_form .btn_submit{margin-left:120px;}
    .platform_blocks{width:100%;}
    .platform_blocks .item{width:46%;margin:0 2% 4%;font-size:10px;}
    .screen_list1 .item {width: 47%;margin: 0 1.5% 3% 1.5%;}
    .service_box .item {width: 100%;margin-bottom: 30px;padding: 0;}
}