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.handbook-item .item-box .img{width:100%}.about-download .download-content .handbook-list .handbook-item .item-box .img img{max-width:100%}.about-download .download-content .handbook-list .handbook-item .item-box .item-info{padding:0.5rem 0.4rem 0.4rem}.about-download .download-content .handbook-list .handbook-item .item-box .tit{color:#ffffff;font-size:0.24rem;text-align:center;height:0.9rem}.about-download .download-content .handbook-list .handbook-item .item-box .tit h3{margin-bottom:0}.about-download .download-content .handbook-list .handbook-item .item-box .download-btn{width:100%;height:0.54rem;border:0.03rem #ffffff solid;display:block;text-align:center;line-height:0.5rem;color:#ffffff}.about-download .download-content .handbook-list .handbook-item .item-box .download-btn span{font-size:0.24rem}.about-download .download-content .handbook-list .handbook-item .item-box .download-btn i{font-size:0.22rem;margin-left:0.08rem}.about-download .download-content .handbook-list .handbook-item .item-box .download-btn:hover{color:#004E97;background:#ffffff}.about-download .download-content .wallpaper-list{padding-top:0.2rem}.about-download .download-content .wallpaper-list.row{margin-left:-0.13rem !important;margin-right:-0.13rem !important}.about-download .download-content .wallpaper-list.row>div{padding-left:0.13rem !important;padding-right:0.13rem !important}.about-download .download-content .wallpaper-list .wallpaper-item{height:4.19rem;position:relative;margin-bottom:0.25rem}.about-download .download-content .wallpaper-list .wallpaper-item .item-box{height:100%}.about-download .download-content .wallpaper-list .wallpaper-item .img{width:100%;height:100%;background-size:cover;background-repeat:no-repeat;background-position:center}.about-download .download-content .wallpaper-list .wallpaper-item .item-info{padding:0.4rem;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-end;position:absolute;left:0.13rem;bottom:0;width:calc(100% - 0.26rem)}.about-download .download-content .wallpaper-list .wallpaper-item .item-info .download-btn{width:2.6rem;height:0.54rem;border:0.03rem #ffffff solid;display:block;text-align:center;line-height:0.5rem;color:#ffffff}.about-download .download-content .wallpaper-list .wallpaper-item .item-info .download-btn span{font-size:0.24rem}.about-download .download-content .wallpaper-list .wallpaper-item .item-info .download-btn i{font-size:0.22rem;margin-left:0.08rem}.about-download .download-content .wallpaper-list .wallpaper-item .item-info .download-btn:hover{color:#004E97;background:#ffffff}.about-download .download-content .wallpaper-list .wallpaper-item .item-info .tit{color:#ffffff;font-size:0.24rem;text-align:center;margin-top:0.2rem}.about-download .download-content .wallpaper-list .wallpaper-item .item-info .tit h3{margin-bottom:0;text-transform:uppercase}.about-download .download-content .wallpaper-list .wallpaper-item .icon-play{width:0.71rem;height:0.71rem;background:url("https://www.dsbte.com/images/icon-play-small.png") no-repeat center/cover;cursor:pointer;position:absolute;left:50%;top:50%;transform:translate(-50%, -50%);z-index:9}.course-box{position:relative;width:10.79rem;min-height:5.65rem;background:linear-gradient(225deg, #fff 0.9rem, #004E97 0);color:#ffffff;padding:0.5rem 1.39rem 0.64rem 0.54rem;font-size:0.18rem}.course-box .course-title{font-size:0.32rem;margin-bottom:0.2rem}.course-box .course-cnt{margin-bottom:0.2rem}.course-box .course-cnt p{text-indent:2em}.course-box .course-tip{font-size:0.16rem;opacity:0.5}.course-box1{padding-top: 1rem;display:flex;position:relative;overflow:hidden;align-items:flex-start;}.course-img{position:relative;width:4.55rem;height:6.39rem;margin-left:-0.74rem;z-index:11}.course-box2{padding-top: 1.2rem;text-align:center;font-size:0.2rem;color:#333333;background:url("https://www.dsbte.com/images/about2.jpg") no-repeat center bottom}.course-box2 .course-c-title{font-size:0.36rem;font-weight:bold;margin-bottom:0.4rem}.course-box2 .course-c-strong{font-size:0.28rem;font-weight:bold;color:#004E97;line-height:0.42rem;margin-bottom:4.76rem}.course-box3{display:flex;padding-top:1.32rem}.course-box3 p{margin-bottom:0.1rem}.course-c-img{width:7.1rem;height:4.16rem}.course-c-box{flex:1;border-top:0.67rem solid #6D6E71;padding:0.3rem 0.6rem 0 0.6rem;color:#333333;box-shadow:0rem 0.02rem 0.12rem 0rem rgba(0,0,0,0.15);border-bottom:0.02rem solid #6D6E71;font-size:0.2rem}.course-c-c{border-top:1px solid rgba(0,0,0,0.2);margin-top:0.45rem;padding-top:0.2rem}.course-c-t{font-size:0.28rem;margin-bottom:0.25rem;font-weight:bold}.course-c-icon{display:inline-block;vertical-align:middle;width:0.16rem;height:0.2rem;margin-right:0.05rem}.course-c-icon2{display:inline-block;vertical-align:middle;width:0.18rem;height:0.18rem;margin-right:0.05rem}.coral-node-editor{height: 6rem;}.about-download .download-content .handbook-list .handbook-item .img{position: relative;overflow: hidden;}.about-download .download-content .handbook-list .handbook-item .img:before{content: '';display: block;padding-bottom: 54.88%;}.about-download .download-content .handbook-list .handbook-item .img>img{position: absolute;top:0;right: 0;bottom: 0;left: 0;width: 100%;height: 100%;-o-object-fit: cover;object-fit: cover}