:root{--blue:#205d87;--nav:#164d72;--ink:#233644;--muted:#6a7b87;--line:#dce5eb;--paper:#fff;--bg:#f2f5f7;--soft:#edf4f8;--teal:#387b79}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--bg);font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline;color:#113b58}button,input{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #ca8e33;outline-offset:3px}.wrap{width:min(1160px,calc(100% - 40px));margin:auto}.topbar{height:32px;background:#e9eff3;border-bottom:1px solid var(--line);font-size:12px;color:#637986}.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:100%}.topbar a{color:inherit;margin-left:18px}.masthead{background:#fff}.masthead-inner{display:flex;align-items:center;justify-content:space-between;gap:35px;padding:25px 0}.brand{display:flex;gap:13px;align-items:center;color:var(--ink)}.brand:hover{text-decoration:none}.brandmark{display:grid;place-items:center;background:var(--blue);width:52px;height:52px;border-radius:5px;color:white;font:32px/1 Georgia,"Songti SC",serif}.brand strong{display:block;font:700 32px/1.1 "Songti SC","SimSun",serif;letter-spacing:3px;color:#174969}.brand small{display:block;margin-top:7px;font-size:11px;letter-spacing:2px;color:var(--muted)}.search{display:flex;max-width:380px;width:100%;border:1px solid #c9d7df;border-radius:4px;overflow:hidden}.search input{width:100%;min-width:0;border:0;padding:10px 13px;background:#f9fbfc;font-size:13px}.search button{border:0;background:var(--blue);color:#fff;padding:9px 20px;white-space:nowrap;cursor:pointer}.nav{background:var(--nav)}.nav .wrap{display:flex;overflow-x:auto;gap:4px}.nav a{white-space:nowrap;color:#e3edf4;padding:12px 19px;font-size:14px}.nav a:hover,.nav a.active{background:#0c3858;text-decoration:none;color:#fff}.page{padding-top:23px;padding-bottom:24px}.notice{display:flex;gap:13px;background:#fff;border:1px solid var(--line);border-left:3px solid #7095ad;padding:10px 16px;font-size:13px;margin:0 0 20px;color:#536d7d}.notice strong{color:#2b5875;white-space:nowrap}.hero{display:grid;grid-template-columns:1.3fr 1fr;align-items:center;background:#e8f1f5;border:1px solid #d5e3ea;border-radius:5px;min-height:235px;overflow:hidden;margin-bottom:23px}.hero-copy{padding:30px 34px}.eyebrow{display:block;color:#587d91;font-size:11px;letter-spacing:3px;font-weight:600;margin-bottom:10px}.hero h1{font:600 34px/1.4 "Songti SC","SimSun",serif;margin:0 0 10px;letter-spacing:1px;color:#214b63}.hero p{font-size:14px;color:#546f7e;margin:0 0 17px}.hero-link{display:inline-flex;align-items:center;gap:16px;font-size:13px;font-weight:600}.city-art{width:100%;height:235px;align-self:end;object-fit:contain;object-position:center bottom}.layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:23px;align-items:start}.panel{background:var(--paper);border:1px solid var(--line);border-radius:4px;margin-bottom:22px;overflow:hidden}.panel-head{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px 19px;border-bottom:1px solid var(--line);background:#fbfcfd}.panel-head h2,.panel-head h1{font-size:16px;margin:0;font-weight:600}.panel-head h2:before{content:"";display:inline-block;background:var(--blue);width:3px;height:15px;vertical-align:-2px;margin-right:9px}.panel-head small,.panel-head>a{font-size:12px;color:var(--muted)}.boards{padding:0 20px}.board{display:grid;grid-template-columns:48px minmax(0,1fr) auto;align-items:center;gap:15px;padding:19px 0;border-bottom:1px solid #e8eef2}.board:last-child{border:0}.board-icon{display:grid;place-items:center;width:45px;height:45px;border:1px solid #d3e0e8;border-radius:7px;background:linear-gradient(135deg,#f5f9fc,#e5eff4);color:#376d8e;font:25px/1 "Songti SC",serif}.board h3{font-size:16px;margin:0 0 3px}.board p{color:var(--muted);font-size:12px;margin:0}.board-stat{text-align:right;color:var(--muted);font-size:11px;min-width:55px}.board-stat b{display:block;font-size:19px;color:#526f83;font-weight:500}.article-row{padding:18px 21px;border-bottom:1px solid #e9eff3}.article-row:last-child{border:0}.row-top{display:flex;align-items:flex-start;gap:10px}.tag{color:#638198;background:#eef4f8;border:1px solid #deebf2;border-radius:3px;white-space:nowrap;padding:0 6px;font-size:10px;line-height:21px}.article-row h3{font-size:15px;line-height:1.55;font-weight:500;margin:0}.article-row h3 a{color:#294c65}.article-row p{font-size:12px;line-height:1.7;color:#768894;margin:7px 0 8px}.row-meta{font-size:11px;color:#8b9ba6;display:flex;gap:13px}.side-content{padding:17px 18px}.side-content p{font-size:13px;color:#6a7e8b;margin:0 0 15px}.side-stat{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);padding-top:12px}.side-stat b{display:block;font-size:24px;font-weight:500;color:#315d79}.side-stat span{font-size:11px;color:var(--muted)}.ranked{padding:6px 18px;margin:0;list-style:none;counter-reset:rank}.ranked li{counter-increment:rank;padding:12px 0;border-bottom:1px solid #eaf0f3;font-size:12px;line-height:1.7;display:flex;gap:10px}.ranked li:last-child{border:0}.ranked li:before{content:counter(rank,decimal-leading-zero);font-size:11px;color:#7a9bad;padding-top:2px}.ranked a{color:#405e73}.quicklinks{padding:8px 18px}.quicklinks a{display:flex;justify-content:space-between;border-bottom:1px solid #edf1f4;padding:11px 0;font-size:12px}.quicklinks a:last-child{border:0}.quicklinks a:after{content:'↗';color:#95aab7}.small-note{background:#edf3f6;padding:17px 18px;font-size:12px;color:#6b808e;border:1px solid #dae5ec;border-radius:4px}.breadcrumb{font-size:12px;color:var(--muted);margin:0 0 18px;line-height:1.7}.breadcrumb span{padding:0 9px;color:#a5b3be}.category-intro{padding:25px;background:#fff;border:1px solid var(--line);margin-bottom:20px;display:flex;align-items:center;gap:20px;border-radius:4px}.category-intro h1{font-size:25px;margin:0}.category-intro p{font-size:13px;color:var(--muted);margin:4px 0 0}.article-card{padding:29px 34px 35px}.article-card h1{font:600 28px/1.55 "Songti SC","SimSun",serif;margin:9px 0 13px;color:#223f53;overflow-wrap:anywhere}.article-meta{font-size:12px;color:#8093a1;border-bottom:1px solid var(--line);padding-bottom:20px;display:flex;gap:15px;flex-wrap:wrap}.lead{font-size:16px;line-height:1.95;color:#4d6677;background:#f5f8fa;border-left:3px solid #9bb7c9;padding:17px 19px;margin:24px 0}.prose{font-size:15px;line-height:2.05;color:#405767}.prose h2{font-size:19px;line-height:1.6;color:#284a62;margin:29px 0 12px}.prose p{margin:0 0 20px}.checklist{margin-top:26px;padding:18px 22px;background:#f0f6f5;border:1px solid #dbe9e5;border-radius:3px}.checklist h2{color:#3f706c;font-size:15px;margin:0 0 10px}.checklist ul{padding-left:20px;margin:0;line-height:1.95;font-size:13px;color:#4a706d}.sources{margin-top:28px;padding-top:20px;border-top:1px solid var(--line);font-size:12px;color:#788c99;line-height:1.9}.sources h2{font-size:14px;color:#557287;margin:0 0 8px}.sources ul{padding-left:18px;margin:0 0 12px}.sources p{margin:8px 0}.toc{padding:12px 18px 17px}.toc a{display:block;font-size:12px;color:#5f7a8c;padding:7px 0}.article-bottom{display:flex;justify-content:space-between;gap:12px;font-size:13px;margin-top:24px;padding-top:17px;border-top:1px solid var(--line)}.related-list{list-style:none;margin:0;padding:4px 20px}.related-list li{padding:12px 0;border-bottom:1px solid #edf1f4;font-size:13px}.related-list li:last-child{border:0}.footer{background:#fff;border-top:1px solid var(--line);padding:25px 0 29px;color:#8495a1;font-size:12px}.footer .wrap{display:flex;justify-content:space-between;gap:25px}.footer strong{color:#526f81;font-size:14px;font-weight:500}.footer p{margin:5px 0}.footer-links{display:flex;gap:20px;align-items:start;flex-wrap:wrap}.footer-links a{color:#688296}.sitemap-group{padding:20px;border-bottom:1px solid var(--line)}.sitemap-group h2{font-size:16px;margin:0 0 10px}.sitemap-group ul{margin:0;padding-left:20px;columns:2;column-gap:30px;font-size:13px;line-height:2.1}.sitemap-group li{break-inside:avoid}.empty{padding:25px;color:#698090}.search-intro{padding:20px 22px;border-bottom:1px solid var(--line);font-size:13px;color:#6b8292}.mobile-only{display:none}.skip{position:absolute;top:-80px;left:15px;background:#fff;padding:10px;z-index:10}.skip:focus{top:5px}
@media(min-width:900px){.article-layout{grid-template-columns:minmax(0,1fr) 260px}.sidebar.sticky{position:sticky;top:20px}}
@media(max-width:850px){.layout{grid-template-columns:minmax(0,1fr) 245px;gap:16px}.wrap{width:calc(100% - 28px)}.hero h1{font-size:28px}.hero-copy{padding:24px}.hero{grid-template-columns:1.3fr 1fr}.article-card{padding:24px}.nav a{padding:11px 14px}.brand strong{font-size:28px}.brand small{letter-spacing:1px}}
@media(max-width:680px){body{font-size:14px}.wrap{width:calc(100% - 24px)}.topbar .right{display:none}.topbar{height:29px}.masthead-inner{gap:18px;flex-wrap:wrap;padding:18px 0}.brandmark{width:43px;height:43px;font-size:27px}.brand strong{font-size:27px}.brand small{font-size:10px}.search{max-width:none}.nav a{padding:10px 13px;font-size:13px}.page{padding-top:15px}.hero{grid-template-columns:1fr;min-height:0;position:relative}.hero-copy{padding:25px 23px 19px;position:relative;z-index:1}.hero h1{font-size:28px}.hero p{font-size:13px;max-width:270px}.city-art{height:130px;opacity:.8}.layout{display:block}.sidebar{margin-top:19px}.sidebar .panel:nth-child(n+3),.sidebar .small-note{display:none}.notice{font-size:11px;padding:10px 12px;gap:9px}.panel-head{padding:13px 16px}.boards{padding:0 16px}.board{padding:17px 0;gap:11px;grid-template-columns:43px minmax(0,1fr) 37px}.board h3{font-size:15px}.board p{font-size:11px}.board-icon{width:40px;height:40px;font-size:22px}.article-row{padding:16px}.row-top{gap:8px}.article-row h3{font-size:14px}.article-row p{font-size:12px}.article-card{padding:20px}.article-card h1{font-size:25px}.lead{padding:15px;font-size:15px}.prose{font-size:15px}.article-meta{gap:9px;font-size:11px}.footer .wrap{display:block}.footer-links{margin-top:16px;gap:18px}.sitemap-group ul{columns:1}.category-intro{padding:20px;gap:15px}.category-intro h1{font-size:23px}.article-bottom{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}