header{background-image:url("../images/about/wanyuan2_01.png");background-size:100% 100%;}
.tab_content{width:1200px;}
.txt_center{text-align:center;}
#base_select{width:800px;}
#about_tabs ul li{width:33%;}
#structure_content,#development_content,#base_content{height:600px;padding:40px 0;}
#structure_content>h1,#development_content>h1,#base_content>h1{font-size:48px;padding:50px 0;}

#base_content{width:1200px;min-height:600px;height:auto;margin:0 auto;}
#base_content .hr{margin:38px 0;}
.base_intro{width:1000px;margin:0 auto 30px;display:flex;flex-flow:column;}
.base_intro p{line-height:64px;font-size:24px;letter-spacing:3px;}
.base_intro p .emphasise{color:#3871E0;font-size:30px;}
.base_intro img{margin:20px auto;}
#base_select{height:60px;}
#base_select a{width:210px;height:60px;line-height:60px;font-size:24px;}



#development_content{width:1200px;height:auto;margin:0 auto;}
#development_content div{padding:40px 0;}


#structure_content{width:1200px;height:1100px;margin:0 auto;}
.structure_image{padding:40px 0;}
.structure_intro{display:flex;flex-flow:row;}
.structure_intro img{margin-right:20px;}
.structure_intro p{text-indent:40px;font-size:20px;line-height:30px;padding:20px;}

#structure_desc_2025 li{list-style-type:disc;font-size:2em;margin-bottom:0.8em;}
#structure_desc_2025 li::marker{color:#881910;font-size:2em;}


@media screen and (min-width: 1366px) {header{height:256px;}}
@media screen and (min-width: 1440px) {header{height:270px;}}
@media screen and (min-width: 1680px) {header{height:315px;}}
@media screen and (min-width: 1920px) {header{height:360px;}}