@charset "utf-8";body{overflow-x:hidden;letter-spacing:1rem}.com_header{display:block;width:100%;height:80rem;position:fixed;top:0;left:0;z-index:99;box-shadow:0 0 4rem 0 rgba(200,200,200,0.8);background:rgba(0,0,0,0.3);transition:all .3s ease-in-out}.com_header.bg-fff{background-color:#fff}.com_header.active{box-shadow:none}.com_header.active .new_head_nav li>a{color:#fff}.com_header.active .new_head_nav li.active>a{color:#f01c1c}.com_header.active .new_header_phone{color:#fff}.com_header.active .new_head_nav li:hover>a{color:#f01c1c}.com_header .new_header_in{height:80rem;width:100%;min-width:1920rem;padding:0 60rem;box-sizing:border-box;font-size:0;display:flex;justify-content:space-between;align-items:center}.com_header .new_header_logo{display:inline-block;width:413rem}.com_header .new_header_logo img{display:block;width:413rem;height:40rem}.com_header .new_head_nav{display:flex;justify-content:flex-end;flex:1;height:80rem;font-size:0;margin:0 100rem}.com_header .new_head_nav li{width:auto;height:80rem;float:left}.com_header .new_head_nav li>a{display:block;padding:0 14rem;line-height:80rem;font-size:16rem;color:#333}.com_header .new_head_nav li:hover>a{color:#f01c1c}.com_header .new_head_nav li.active>a{color:#f01c1c}.com_header .new_head_menu{display:none;width:100%;height:auto;background:#fff;position:absolute;overflow:hidden;top:100%;left:0%;box-shadow:1rem 1rem 2rem 2rem rgba(200,200,200,0.4)}.com_header .new_head_menu .solution_box{width:100%;height:100%;background:#fff;box-sizing:border-box;padding:30rem 60rem;display:flex;align-items:center;justify-content:space-between}.com_header .new_head_menu .solution_box .solution_box_text{flex:1;font-size:30rem;line-height:36rem;color:#1A1A2E;text-align:left}.com_header .new_head_menu .solution_box .solution_box_text .jiantouPic{width:20rem;height:20rem;background-repeat:no-repeat;background-position:center;background-size:contain;margin-top:16rem}.com_header .new_head_menu .solution_box .solution_box_link{width:610rem;display:flex;flex-wrap:wrap;margin:0 100rem}.com_header .new_head_menu .solution_box .solution_box_link a{width:50%;height:46rem;text-align:left;font-size:16rem;line-height:46rem;color:#333;display:flex;align-items:center;justify-content:space-between;padding-right:100rem;box-sizing:border-box}.com_header .new_head_menu .solution_box .solution_box_link a:hover{color:#ff3318}.com_header .new_head_menu .solution_box .solution_box_link a:hover .jiantou{border-color:#ff3318}.com_header .new_head_menu .solution_box .solution_box_link a.current{color:#ff3318}.com_header .new_head_menu .solution_box .solution_box_link a.current .jiantou{border-color:#ff3318}.com_header .new_head_menu .solution_box .solution_box_link a .solution_box_link_item{display:flex;align-items:center}.com_header .new_head_menu .solution_box .solution_box_link a .solution_box_link_item .iconPic{width:20rem;height:20rem;background-repeat:no-repeat;background-position:center;background-size:contain;margin-right:10rem}.com_header .new_head_menu .solution_box .solution_box_link a .jiantou{transform:rotate(45deg);border-top:2rem solid;border-right:2rem solid;width:8rem;height:8rem;border-color:#999999;transition:border-color .3s ease}.com_header .new_head_menu .solution_box .right_pic{width:460rem;height:280rem;background-color:#f0f0f0;background-repeat:no-repeat;background-position:center;background-size:cover}.com_header .new_header_phone{display:inline-block;font-size:16rem;line-height:50rem;text-align:center;font-weight:bold;color:#fff;width:120rem;height:50rem;border-radius:100rem;background:#ff3318}.com-breadcrumb{height:auto;overflow:hidden}.com-breadcrumb .com-breadcrumb-in{display:flex;align-items:center;justify-content:flex-start;gap:10rem;line-height:20rem}.com-breadcrumb .com-breadcrumb-in .breadcrumbPic{width:16rem;height:16rem;background-repeat:no-repeat;background-position:center;background-size:contain}.com-breadcrumb .com-breadcrumb-in a{font-size:16rem;color:#333333}.com-breadcrumb .com-breadcrumb-in span{font-size:16rem;color:#333333}.com-banner{width:100%;margin:0 auto;height:460rem;padding:0 160rem;box-sizing:border-box;overflow:hidden;text-align:left;background-size:cover;background-position:center;background-repeat:no-repeat;display:flex;flex-direction:column;justify-content:center}.com-banner h2{line-height:85rem;font-size:30rem;font-family:"微软雅黑";color:#fff}.com-banner h2 .com-banner-title{font-size:70rem;line-height:1.1}.com-banner h1.com-banner-title{margin:0;font-size:70rem;line-height:1.1;font-family:"微软雅黑";color:#fff}.com-banner .com-banner-desc{font-size:20rem;line-height:30rem;color:#fff;margin-top:20rem}.com_footer{display:block;width:100%;height:600rem;background-color:#222;position:relative;padding-top:90rem;box-sizing:border-box}.com_footer .com_footer-top{display:flex}.com_footer .com_footer-top .new_footer_left{margin-right:140rem;font-size:12rem;color:#808080;flex:1;display:flex;flex-direction:column;justify-content:space-between}.com_footer .com_footer-top .new_footer_left .com-banner-title{font-size:32rem;color:rgba(255,255,255,0.5);font-family:"微软雅黑";font-weight:bold;line-height:1.3}.com_footer .com_footer-top .new_footer_left .com-footer-btn{display:flex;align-items:center;justify-content:center;gap:30rem;width:160rem;height:50rem;line-height:46rem;text-align:center;border-radius:100rem;box-sizing:border-box;border:2rem solid rgba(255,255,255,0.5);cursor:pointer;color:rgba(255,255,255,0.5);font-size:16rem;font-weight:bold;position:relative;overflow:hidden;transition:color .35s ease,border-color .35s ease,background-color .35s ease,box-shadow .35s ease,transform .35s ease}.com_footer .com_footer-top .new_footer_left .com-footer-btn img{width:16rem;height:16rem;transition:filter .35s ease,transform .35s ease,opacity .35s ease}.com_footer .com_footer-top .new_footer_left .com-footer-btn:hover{color:#222222;border-color:#ffffff;background-color:#ffffff;box-shadow:0 12rem 30rem rgba(255,255,255,0.16);transform:translateY(-3rem)}.com_footer .com_footer-top .new_footer_left .com-footer-btn:hover img{filter:brightness(0);animation:footerLeftArrowFly .55s ease both}.com_footer .com_footer-top .new_footer_in{font-size:12rem;color:#808080;max-width:270rem;margin-right:120rem}.com_footer .com_footer-top .new_footer_in .com-footer-btn{display:flex;align-items:center;justify-content:center;gap:30rem;width:100%;height:50rem;line-height:46rem;text-align:center;box-sizing:border-box;border:2rem solid #444444;border-radius:100rem;background:#333333;cursor:pointer;color:#fff;font-size:16rem;font-weight:bold;position:relative;overflow:hidden;transition:all .3s ease}.com_footer .com_footer-top .new_footer_in .com-footer-btn img{width:10rem;height:10rem;position:absolute;top:50%;transform:translateY(-50%);right:20rem;transition:filter .3s ease}.com_footer .com_footer-top .new_footer_in .com-footer-btn:hover{color:#222222;border-color:#ffffff;background:#ffffff}.com_footer .com_footer-top .new_footer_in .com-footer-btn:hover img{filter:brightness(0);animation:footerLinkArrowFly .55s ease both}.com_footer .com_footer-top .new_footer_in .footer-link-wrap{width:100%;position:relative}.com_footer .com_footer-top .new_footer_in .footer-link-pop{width:260rem;height:310rem;box-sizing:border-box;padding:20rem 16rem 20rem 20rem;position:absolute;left:50%;bottom:62rem;z-index:12;border-radius:18rem;background:#fff;box-shadow:0 16rem 40rem rgba(0,0,0,0.12);opacity:0;visibility:hidden;transform:translateX(-50%) translateY(12rem);transition:opacity .28s ease,visibility .28s ease,transform .28s ease;pointer-events:none}.com_footer .com_footer-top .new_footer_in .footer-link-pop::after{content:"";position:absolute;left:0;right:0;bottom:-14rem;height:14rem;background:transparent}.com_footer .com_footer-top .new_footer_in .footer-link-scroll{height:100%;overflow-y:auto;overflow-x:hidden;padding-right:14rem}.com_footer .com_footer-top .new_footer_in .footer-link-scroll::-webkit-scrollbar{width:3rem}.com_footer .com_footer-top .new_footer_in .footer-link-scroll::-webkit-scrollbar-track{background:#eeeeee;border-radius:3rem}.com_footer .com_footer-top .new_footer_in .footer-link-scroll::-webkit-scrollbar-thumb{background:#bdbdbd;border-radius:3rem}.com_footer .com_footer-top .new_footer_in .footer-link-scroll a{display:block;color:#333;font-size:16rem;line-height:36rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .2s ease,transform .2s ease}.com_footer .com_footer-top .new_footer_in .footer-link-scroll a:hover{color:#ff3318;transform:translateX(6rem)}.com_footer .com_footer-top .new_footer_in .footer-link-wrap.is-open .footer-link-pop{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);pointer-events:auto}.com_footer .com_footer-top .new_footer_in h2{font-size:20rem;color:#fff;line-height:40rem;margin-bottom:15rem;position:relative;font-weight:400}.com_footer .com_footer-top .new_footer_in .new_footer_share{display:flex;align-items:center;gap:10rem;line-height:20rem}.com_footer .com_footer-top .new_footer_in .new_footer_share a{width:60rem;height:36rem;display:flex;align-items:center;justify-content:center;border-radius:100rem;background-color:#333333;transition:all .3s ease-in-out;position:relative}.com_footer .com_footer-top .new_footer_in .new_footer_share a:hover{transform:scale(1.1)}.com_footer .com_footer-top .new_footer_in .new_footer_share a:hover .footer-share-code{opacity:1;visibility:visible;transform:translateX(-50%) translateY(-10rem)}.com_footer .com_footer-top .new_footer_in .new_footer_share a .footer-share-code{width:130rem;height:130rem;box-sizing:border-box;padding:2rem;position:absolute;left:50%;bottom:52rem;z-index:5;border-radius:8rem;background:#ffffff;box-shadow:0 8rem 24rem rgba(0,0,0,0.18);opacity:0;visibility:hidden;transform:translateX(-50%) translateY(0);transition:opacity .28s ease,visibility .28s ease,transform .28s ease;pointer-events:none}.com_footer .com_footer-top .new_footer_in .new_footer_share a .footer-share-code::after{content:'';width:0;height:0;position:absolute;left:50%;bottom:-6rem;transform:translateX(-50%);border-left:8rem solid transparent;border-right:8rem solid transparent;border-top:8rem solid #ffffff}.com_footer .com_footer-top .new_footer_in .new_footer_share a .footer-share-code img{display:block;width:100%;height:100%;object-fit:contain}.com_footer .com_footer-top .new_footer_in .new_footer_share a>img{display:block;width:20rem;height:18rem;object-fit:contain}.com_footer .com_footer-top .new_footer_in .new_footer_share a>img[src*="douyin"]{width:18rem;height:20rem}.com_footer .com_footer-top .new_footer_in .new_footer_share a>img[src*="xiaohongshu"]{width:34rem;height:12rem}.com_footer .com_footer-top .new_footer_in a{display:block;color:rgba(255,255,255,0.5);line-height:36rem;font-size:16rem}.com_footer .com_footer-top .new_footer_in ul li a{transition:color .3s ease,transform .3s ease}.com_footer .com_footer-top .new_footer_in a:hover{color:#ff3318}.com_footer .com_footer-top .new_footer_in ul li a:hover{transform:translateX(10rem)}.com_footer .com_footer-top .new_footer_in .tel{font-size:36rem;color:rgba(255,255,255,0.5);line-height:40rem;font-weight:bold;position:relative}.com_footer .new_fooer_beian{display:flex;flex-direction:column;justify-content:center;align-items:center;height:120rem;background-color:#222;position:absolute;bottom:0;left:50%;transform:translateX(-50%);text-align:center;line-height:30rem;color:#808080;font-size:14rem;border-top:1rem solid #444444}.com_footer .new_fooer_beian a{color:#808080}.com_footer .new_fooer_beian img{width:20rem;height:20rem;margin-right:4rem;vertical-align:-4rem}.com_footer .new_fooer_beian a:hover{color:#fff}.com_footer .new_footer_ewm{display:inline-block;float:right;width:auto;height:100%;margin-right:20rem}.com_footer .new_footer_ewm span{display:block;width:128rem;height:128rem;margin-bottom:6rem}.com_footer .new_footer_ewm p{font-size:12rem;color:#fff;line-height:20rem}.com_footer .new_footer_ewm h3{font-size:20rem;color:#fff;line-height:24rem}.com_footer .new_fonter_lianjie{display:block;width:100%;height:48rem;position:absolute;bottom:42rem;left:0;font-size:12rem;color:#8c8c8c;line-height:48rem;text-align:center}.com_footer .new_fonter_lianjie a{color:#8c8c8c}.com_footer .new_fonter_lianjie a:hover{color:#fff}.com_footer .new_fonter_lianjie img{width:16rem}@keyframes footerLinkArrowFly{0%{opacity:1;transform:translateY(-50%) translate(0, 0)}42%{opacity:0;transform:translateY(-50%) translate(22rem, -22rem)}43%{opacity:0;transform:translateY(-50%) translate(-22rem, 22rem)}100%{opacity:1;transform:translateY(-50%) translate(0, 0)}}@keyframes footerLeftArrowFly{0%{opacity:1;transform:translate(0, 0)}42%{opacity:0;transform:translate(22rem, -22rem)}43%{opacity:0;transform:translate(-22rem, 22rem)}100%{opacity:1;transform:translate(0, 0)}}.com-btn{width:160rem;height:50rem;box-sizing:border-box;border:2rem solid #333333;border-radius:100rem;font-size:16rem;font-weight:bold;color:#333333;display:flex;align-items:center;justify-content:center;transition:all .3s ease-in-out}.com-btn::after{content:'';width:16rem;height:16rem;background-image:url('/Jzw/Tpl/Home/Default/webimages/right.png');background-size:contain;background-repeat:no-repeat;background-position:center;margin-left:10rem;filter:brightness(0);transition:all .3s ease-in-out}.com-btn:hover::after{transform:translateX(10rem)}.right-kefu{position:fixed;right:20rem;bottom:20%;z-index:1000}.right-kefu .flex{display:flex}.right-kefu .flex.ver-center{align-items:center}.right-kefu .flex.align-start{align-items:flex-start}.right-kefu .flex.just-between{justify-content:space-between}.right-kefu .flex-1{flex:1}.right-kefu .block-group,.right-kefu .li-fa .go-top{border-radius:500rem;background:#fff;box-shadow:0 0 30rem rgba(0,0,0,0.1)}.right-kefu .li-fa{width:74rem;margin-top:10rem;display:flex;justify-content:center}.right-kefu .li-fa .go-top{display:none}.right-kefu .li{width:74rem;background:#fff;aspect-ratio:1/1;border-radius:100%;display:flex;align-items:center;justify-content:center;cursor:pointer;position:relative}.right-kefu .li:hover .cont{opacity:1;visibility:visible;pointer-events:auto}.right-kefu .li.to-form:hover .right-message-cont{opacity:0;visibility:hidden;pointer-events:none}.right-kefu .li.to-form.message-open .right-message-tip{opacity:0;visibility:hidden;pointer-events:none}.right-kefu .li.to-form.message-open .right-message-cont{opacity:1;visibility:visible;pointer-events:auto}.right-kefu .li.message-closed .right-message-cont{opacity:0;visibility:hidden;pointer-events:none}.right-kefu .li .cont{padding-right:10rem;position:absolute;right:100%;bottom:0;transition:opacity .3s,visibility .3s;visibility:hidden;opacity:0;pointer-events:none}.right-kefu .li .cont ul{background:#fff;box-shadow:0 0 30rem rgba(0,0,0,0.1);border-radius:6rem;padding:8rem 20rem 3rem;min-width:280rem}.right-kefu .li .cont ul li{padding:10rem 0;border-bottom:1rem solid #ddd}.right-kefu .li .cont ul li:last-child{border-bottom:none}.right-kefu .li .cont ul li .ewm{width:100rem;flex-shrink:0;margin-right:10rem;box-shadow:0 0 23rem rgba(68,102,209,0.18)}.right-kefu .li .cont ul li .ewm img{display:block;width:100%;height:auto}.right-kefu .li .cont ul li .text h5{font-size:20rem;font-weight:normal;margin-bottom:6rem;color:#333;white-space:nowrap}.right-kefu .li .cont ul li .text p{font-size:16rem;color:#333;white-space:nowrap}.right-kefu .li .cont ul li .text p span{font-size:22rem;font-weight:bold}.right-kefu .li .cont ul li .text small{font-size:14rem;color:#ff3318;white-space:nowrap}.right-kefu .li .cont.norm{top:0;bottom:auto}.right-kefu .li .cont.norm2{top:auto;bottom:0}.right-kefu .li .cont.right-message-cont{position:fixed;left:0;top:0;right:auto;bottom:auto;width:100vw;height:100vh;z-index:1000;padding:0;display:flex;align-items:center;justify-content:center}.right-kefu .li .cont.right-message-cont::before{content:'';position:absolute;left:0;top:0;width:100%;height:100%;background:rgba(0,0,0,0.45);backdrop-filter:blur(2rem)}.right-kefu .li .cont .bg-white{background:#fff;padding:16rem 20rem;box-shadow:0 0 30rem rgba(0,0,0,0.1);border-radius:6rem;white-space:nowrap}.right-kefu .li .cont .bg-white a{font-size:16rem;color:#333}.right-kefu .li .cont .bg-white a b,.right-kefu .li .cont .bg-white a .hl{color:#ff3318}.right-kefu .li .cont .right-message-panel{width:1200rem;max-width:calc(100vw - 80rem);height:720rem;max-height:calc(100vh - 80rem);overflow:hidden;display:flex;cursor:default;border-radius:20rem;background:#fff;box-shadow:0 22rem 70rem rgba(0,0,0,0.16);position:relative;z-index:1}.right-kefu .li .cont .message-benefits{width:600rem;height:100%;box-sizing:border-box;padding:40rem;position:relative;overflow:hidden;background-image:url('/Jzw/Tpl/Home/Default/webimages/contact/right.png');background-size:cover;background-position:center;background-repeat:no-repeat}.right-kefu .li .cont .message-benefits h3{margin:0 0 30rem;font-size:24rem;line-height:1.1;color:#333333;font-weight:bold}.right-kefu .li .cont .message-benefits .benefit-list{position:relative;z-index:1}.right-kefu .li .cont .message-benefits .benefit-item{display:flex;align-items:flex-start;gap:22rem;min-height:122rem;position:relative;margin-bottom:20rem}.right-kefu .li .cont .message-benefits .benefit-item:not(:last-child)::after{content:'';width:2rem;height:70rem;position:absolute;left:16rem;top:52rem;background:#ff3318}.right-kefu .li .cont .message-benefits .benefit-icon{width:32rem;height:32rem;flex-shrink:0;box-sizing:border-box;position:relative;margin-top:2rem;background-size:contain;background-position:center;background-repeat:no-repeat}.right-kefu .li .cont .message-benefits .benefit-text{padding-top:2rem}.right-kefu .li .cont .message-benefits .benefit-text h4{margin:0 0 12rem;font-size:20rem;line-height:1.35;color:#333;font-weight:bold}.right-kefu .li .cont .message-benefits .benefit-text p{margin:0;max-width:430rem;font-size:14rem;line-height:24rem;color:#333;white-space:normal}.right-kefu .li .cont .message-form-card{flex:1;height:100%;box-sizing:border-box;padding:40rem;position:relative;background:#fff}.right-kefu .li .cont .message-form-card h3{margin:0 0 6rem;font-size:24rem;line-height:1.1;color:#333;font-weight:bold}.right-kefu .li .cont .message-form-card .message-form-desc{margin:10rem 0 20rem;font-size:14rem;line-height:1.1;color:#333;white-space:normal}.right-kefu .li .cont .right-message-close{width:30rem;height:30rem;border:none;background:transparent;position:absolute;top:30rem;right:30rem;cursor:pointer;transition:all .3s linear;border-radius:50%;font-size:20rem;line-height:1;display:flex;align-items:center;justify-content:center}.right-kefu .li .cont .right-message-close:hover{transform:rotate(180deg);background-color:#ff3318;color:#fff}.right-kefu .li .cont .message-form-item{min-height:70rem;display:flex;align-items:flex-start;gap:30rem;padding:20rem 0;border-bottom:1rem solid #eeeeee;box-sizing:border-box}.right-kefu .li .cont .message-form-label{width:42rem;flex-shrink:0;font-size:14rem;line-height:30rem;color:#333;font-weight:normal;display:flex}.right-kefu .li .cont .message-form-label em{font-style:normal}.right-kefu .li .cont .message-form-pills{flex:1;display:flex;flex-wrap:wrap;gap:10rem}.right-kefu .li .cont .message-form-pills label{position:relative;cursor:pointer}.right-kefu .li .cont .message-form-pills input{position:absolute;width:0;height:0;opacity:0;pointer-events:none}.right-kefu .li .cont .message-form-pills span{min-width:58rem;height:30rem;display:block;box-sizing:border-box;padding:0 16rem;border:1rem solid #333333;border-radius:18rem;font-size:14rem;line-height:28rem;text-align:center;color:#333333;background:#fff;white-space:nowrap;transition:all .2s}.right-kefu .li .cont .message-form-pills input:checked+span,.right-kefu .li .cont .message-form-pills label:hover span{color:#fff;border-color:#2f3033;background:#2f3033}.right-kefu .li .cont .message-fields input,.right-kefu .li .cont .message-fields textarea{display:block;width:100%;box-sizing:border-box;border:none;border-bottom:1rem solid #eeeeee;border-radius:0;outline:none;background:transparent;font-size:14rem;color:#222;transition:border-color .2s}.right-kefu .li .cont .message-fields input::-webkit-input-placeholder,.right-kefu .li .cont .message-fields textarea::-webkit-input-placeholder{color:#aaa}.right-kefu .li .cont .message-fields input:focus,.right-kefu .li .cont .message-fields textarea:focus{border-bottom-color:#333}.right-kefu .li .cont .message-fields input{height:50rem;line-height:50rem;padding:0}.right-kefu .li .cont .message-fields textarea{height:120rem;padding:26rem 0 0;line-height:24rem;resize:none}.right-kefu .li .cont .right-message-submit{width:140rem;height:50rem;margin-top:30rem;border:none;border-radius:25rem;background:#333;color:#fff;font-size:16rem;font-weight:bold;line-height:50rem;cursor:pointer;transition:background .2s}.right-kefu .li .cont .right-message-submit:hover{background:#ff3318}.right-kefu .icon-p{border-radius:100%;display:flex;align-items:center;justify-content:center;width:54rem;height:54rem;transition:background .3s;text-decoration:none;position:relative;flex-shrink:0}.right-kefu .icon-p>a{display:flex;align-items:center;justify-content:center;width:100%;height:100%}.right-kefu .icon-p .icon{width:22rem;height:22rem;object-fit:contain;display:block;transition:opacity .3s}.right-kefu .icon-p .icon+.icon{display:none}.right-kefu .icon-p>.icon:first-child:nth-last-child(2),.right-kefu .icon-p>.icon:nth-child(2){position:absolute;top:50%;left:50%;transform:translate(-50%, -50%);margin:0}.right-kefu .li:hover .icon-p,.right-kefu .li.on .icon-p{background:#ff3318}.right-kefu .li:hover .icon-p>.icon:nth-child(1):nth-last-child(2),.right-kefu .li.on .icon-p>.icon:nth-child(1):nth-last-child(2){display:none}.right-kefu .li:hover .icon-p>.icon:nth-child(2),.right-kefu .li.on .icon-p>.icon:nth-child(2){display:block}.right-kefu .li:hover .icon-p .icon:only-child,.right-kefu .li.on .icon-p .icon:only-child{filter:brightness(0) invert(1)}.right-kefu .block-group .li::after{content:'';height:1rem;width:24rem;left:50%;transform:translateX(-50%);bottom:0;position:absolute;background:#eee}.right-kefu .block-group .li:last-child::after{display:none}.right-kefu .block-group .li.on .icon-p{background:#ff3318}.right-kefu .block-group .li.on .icon-p .icon:only-child{filter:brightness(0) invert(1)}