.heng{width:60vw;margin:2vh auto;box-sizing:content-box}.demo-image__preview{float:left;width:20vw;margin:1vh 5vw;box-sizing:content-box}.demo-image__preview .el-image{width:20vw;height:12vw}.heng:after{display:block;content:"";clear:both}.zong{width:60vw;margin:5vh auto}.zong,.zong_preview{box-sizing:content-box}.zong_preview{float:left;width:20vw;margin-top:1vh}.zong_preview .el-image{width:15vw;height:20vw}.zong:after{display:block;content:"";clear:both}.main{width:100%}.tab{margin:20px auto;margin-left:calc(50% - 200px)}.breadC{margin:4vh 4vw;font-size:.8rem}.content{text-align:center}.content>div{width:50vw;margin:0 auto;font-size:1.1rem}.content>div>div{text-align:left;margin:3vh auto}.content .text span{font-size:1.25rem;font-weight:700;color:#00008b}.content .title{color:#00008b;font-weight:700;font-size:1.1rem}.content .bigT{font-size:1.25rem;font-weight:700}span.expert{text-decoration:underline}.content .detail{font-size:1rem;text-indent:2rem;line-height:2rem}.introduction .title{text-align:center}.introContent{margin:1.5rem 2rem;display:flex;align-items:center;background:#fafafa}.introContent .pic{width:35vw;height:55vh;overflow:hidden}.introContent:hover img,.introContent img:hover{transform:scale(1.1)}.introContent img{height:55vh;line-height:55vh;transition:all .5s}.contentText{line-height:2.5rem;padding:0 2rem 0 4rem}.contentText .f16{font-size:16px;color:#333;margin-bottom:10px;line-height:2rem}.contentText .f14{line-height:1.5rem;color:#6e6e6e;font-size:14px}