.menu-btn{width:1.55rem;height:.9rem;background:var(--theme-color);display:flex;flex-direction:column;gap:.1rem;align-items:center;justify-content:center;float:none;border-radius:.45rem 0 0 .45rem;cursor:pointer}.menu-btn.btn2{display:none}.menu-btn .xian{display:block;height:.02rem;width:.36rem;background:#fff;border-radius:.05rem;transition:all .4s ease-in-out}.fixbox{position:fixed;z-index:3;background:url(../images/fixbox-bg.png) no-repeat center bottom/cover;width:100%;height:100vh;transition:.4s ease-in-out;display:flex;align-items:center;justify-content:center;top:-100%;clip-path:circle(32px at 110% 0);padding:Min(.5rem,5.2vh) 1.1rem 0;box-sizing:border-box;overflow:auto}.fixbox.active{top:0}.fixbox .close{width:.48rem;height:.48rem;border-radius:50%;display:flex;align-items:center;justify-content:center;position:absolute;right:50%;margin-right:-8.2rem;top:.55rem;cursor:pointer}.fixbox .close img{width:.25rem}.fixbox.open{display:flex}.fixbox{flex-wrap:wrap;justify-content:space-between;align-content:space-between;flex-direction:column;display:block;clip-path:none!important}.fixbox .nav-wrap{display:flex;justify-content:space-between}.fixbox .navbox-head{margin-bottom:Min(.8rem,8.3vh)}.fixbox .navbox-top{border-bottom:1px solid rgba(255,255,255,.2);flex-direction:row-reverse;gap:.8rem}.fixbox .navbox-bottom{padding-top:Min(.67rem,7vh);align-items:center}.fixbox .navbox-sitelogo img{width:3.58rem}.fixbox .navbox-close{display:flex;gap:var(--medium-size);align-items:center}.fixbox .navbox-close img{width:.48rem;cursor:pointer}.fixbox .navbox-top .site-lang{flex:2.05rem 0 0;border-right:1px solid rgba(255,255,255,.2)}.fixbox .navbox-top .site-lang li:last-child{display:none}.fixbox .navbox-top .site-lang a{font-size:var(--base-size);display:block;color:rgba(255,255,255,.8);line-height:1.2}.fixbox .navbox-top .site-lang li+li{margin-top:.36rem}.fixbox .navbox-bottom .site-lang{flex:1.6rem 0 0}.fixbox .navbox-bottom .site-lang a{display:block;font-size:var(--medium-size);color:#fff;border-radius:4px;border:1px solid #fff;line-height:3.4;text-align:center}.fixbox>.searchbox{display:none}.fixbox .searchbox{left:0;background:#fff;border-radius:.48rem;width:.48rem}.fixbox .searchbox:hover{width:3rem}.fixbox .wp-search .search-btn input.search-submit{background-image:url(https://www.nsi.edu.cn/_upload/tpl/01/87/391/template391/images/sous-navbox.svg)}.fixbox .wp-search .search-btn{height:100%;width:.48rem}.fixbox .wp-search .search-input input.search-title{line-height:.48rem;color:var(--theme-color)}.fixbox a{color:#fff}.fixbox .wp-panel{overflow-y:auto;margin-bottom:.3rem;flex:1 0 0}.fixbox .wp-menu{display:flex;justify-content:space-between;height:Min(4rem,42vh)}.fixbox .wp-menu .menu-link{font-size:.24rem;line-height:1;display:block;margin-bottom:.4rem}.fixbox .wp-menu .sub-menu{margin-top:.3rem;text-align:center}.fixbox .wp-menu .sub-menu .sub-menu{display:none}.fixbox .wp-menu .sub-menu a{display:block;font-size:var(--regular-size);opacity:.6;line-height:1.2}.fixbox .wp-menu .sub-menu li+li{margin-top:.22rem}.fixbox .wp-menu .sub-menu .sub-menu{display:block}