*{box-sizing:border-box;margin:0;padding:0;}
:root{--lake:#0c7fc3;--lake-d:#075b83;--green:#118b6a;--gold:#d5a42d;--ink:#23313e;--sub:#637385;--line:#dce5e8;--bg:#f3f7f7;}
html{scroll-behavior:auto;}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.7;letter-spacing:0;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;}
img{display:block;max-width:100%;height:auto;}
.wrap{width:min(1200px,calc(100% - 48px));margin:0 auto;}
.crumb{background:#fff;border-bottom:1px solid var(--line);font-size:14px;color:var(--sub);}
.crumb .wrap{display:flex;align-items:center;gap:12px;min-height:46px;}
.crumb a:hover{color:var(--lake);}
.regions-layout{display:grid;grid-template-columns:238px minmax(0,1fr);gap:26px;align-items:start;margin:24px auto 40px;}
.regions-aside{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto;scrollbar-width:thin;}
.regions-aside h2{font-size:21px;color:#fff;background:var(--lake-d);padding:16px 20px;line-height:1.5;}
.region-tabs{background:#fff;border:1px solid var(--line);border-top:0;}
.region-group{font-size:13px;font-weight:400;color:var(--sub);background:#f2f6f8;padding:9px 20px;border-bottom:1px solid var(--line);}
.region-tab{display:flex;justify-content:space-between;gap:8px;align-items:center;min-height:45px;padding:10px 19px;border-bottom:1px solid #edf1f3;font-size:16px;line-height:1.55;}
.region-tab:last-child{border-bottom:0;}
.region-tab::after{content:'›';font-size:20px;color:#90a5b0;flex:none;}
.region-tab:hover{background:#edf6fa;color:var(--lake-d);}
.region-tab[aria-selected="true"]{background:var(--green);color:#fff;font-weight:600;}
.region-tab[aria-selected="true"]::after{color:#fff;}
a:focus-visible,button:focus-visible{outline:2px solid #0c7fc3;outline-offset:3px;}
.region-content{min-width:0;background:white;border-top:3px solid var(--green);padding:28px 34px 40px;}
.region-panel{scroll-margin-top:20px;}
.region-panel[hidden]{display:none;}
.region-heading{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:22px;}
.region-heading .region-category{font-size:14px;color:var(--green);margin-bottom:7px;}
.region-heading h2{font-size:28px;line-height:1.55;font-weight:600;color:#223d50;overflow-wrap:anywhere;}
.region-heading h2:focus{outline:none;}
.region-toc{display:flex;flex-wrap:wrap;gap:8px 0;padding:0 0 18px;margin-bottom:22px;border-bottom:1px solid var(--line);font-size:14px;line-height:1.6;}
.region-toc a{color:var(--lake-d);padding-right:14px;margin-right:14px;border-right:1px solid #d4dfe5;}
.region-toc a:last-child{border-right:0;}
.region-toc a:hover{text-decoration:underline;}
.region-prose p{font-size:17px;line-height:2.05;text-indent:2em;text-align:justify;overflow-wrap:anywhere;margin-bottom:17px;color:#33434e;}
.region-prose h3{font-size:20px;line-height:1.55;color:var(--lake-d);padding-left:12px;border-left:4px solid var(--green);margin:30px 0 15px;scroll-margin-top:24px;}
.region-figure{margin:24px 0;}
.region-figure img{width:100%;height:auto;object-fit:contain;}
.region-photo-pair{display:flex;align-items:stretch;gap:12px;margin:24px 0;}
.region-photo-pair .region-figure{margin:0;flex:1;min-width:0;}
.region-photo-pair img{height:auto;object-fit:contain;}
.region-article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:22px;font-size:14px;color:var(--lake-d);}
@media(min-width:941px){[data-portal-header] .portal-main-nav a{padding:0 7px;}}
@media(max-width:940px){.regions-layout{grid-template-columns:200px minmax(0,1fr);gap:18px;}.region-content{padding:24px;}.region-heading h2{font-size:25px;}}
@media(max-width:680px){.wrap{width:calc(100% - 28px);}.regions-layout{display:block;margin-top:16px;}.regions-aside{position:static;max-height:none;margin-bottom:20px;}.region-tabs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));}.region-group{grid-column:1/-1;}.region-tab{font-size:14px;min-height:44px;padding:9px 12px;}.regions-aside h2{font-size:19px;padding:12px 16px;}.region-content{padding:20px 18px;}.region-heading h2{font-size:24px;}.region-prose p{font-size:16px;}.region-photo-pair{display:block;}.region-photo-pair .region-figure{margin:16px 0;}.region-photo-pair img{height:auto;}.region-article-nav{flex-wrap:wrap;}}
@media print{.portal-head,.portal-main-nav,.subpage-masthead,.crumb,.regions-aside,.region-toc,.region-article-nav,.portal-official-footer{display:none!important;}.regions-layout{display:block;width:100%;margin:0;}.region-content{padding:0;border:0;}.region-prose h3{break-after:avoid;}.region-figure{break-inside:avoid;}}