.about-center{ overflow:hidden; background:#d7e9ed;}
.about-center>img{ width:50%; float:right;}
.about-center>p{ float:left; width:50%; padding:.5rem 0 .5rem .5rem; overflow:hidden; color:#555; font-size:.36rem; line-height:.5rem; text-align:justify; text-justify:inter-ideograph;}

.mask{ position:fixed; z-index:10; top:0; right:0; height:100%; width:1.2rem; background:rgba(255,255,255,.85);}
.mask .right{ margin:.3rem 0; text-align:center;}
.mask .right img{ width:.5rem;}
.mask ul{ overflow:hidden; width:.8rem; margin-left:.2rem;}
.mask ul li{ border-bottom:1px #ccc solid; padding-bottom:.3rem; margin-bottom:.3rem; overflow:hidden; text-align:center; color:#666; font-size:.36rem;}
.mask ul li img{ width:.8rem; display:block; margin-bottom:.1rem;}