:root{color-scheme:light;--blue:#174baa;--blue-deep:#113678;--blue-soft:#edf3ff;--paper:#fff;--canvas:#f3f5f9;--ink:#18253a;--muted:#5d6b80;--line:#e1e7ef;--success:#2b6b47;--success-soft:#eaf6ef;--danger:#9a3546;--danger-soft:#fff0f2;--max:1400px;--radius:10px;font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",sans-serif}
@media(prefers-color-scheme:dark){:root{color-scheme:dark;--blue:#8db5ff;--blue-deep:#b4cfff;--blue-soft:#202f4b;--paper:#192436;--canvas:#111a27;--ink:#e6edf8;--muted:#aab9ce;--line:#344156;--success:#9bd2b0;--success-soft:#23392e;--danger:#ffafbc;--danger-soft:#422830}}
:root[data-theme="light"]{color-scheme:light;--blue:#174baa;--blue-deep:#113678;--blue-soft:#edf3ff;--paper:#fff;--canvas:#f3f5f9;--ink:#18253a;--muted:#5d6b80;--line:#e1e7ef;--success:#2b6b47;--success-soft:#eaf6ef;--danger:#9a3546;--danger-soft:#fff0f2}
:root[data-theme="dark"]{color-scheme:dark;--blue:#8db5ff;--blue-deep:#b4cfff;--blue-soft:#202f4b;--paper:#192436;--canvas:#111a27;--ink:#e6edf8;--muted:#aab9ce;--line:#344156;--success:#9bd2b0;--success-soft:#23392e;--danger:#ffafbc;--danger-soft:#422830}
*{box-sizing:border-box}[hidden]{display:none!important}html{scroll-behavior:smooth;scroll-padding-top:86px}body{margin:0;background:var(--canvas);color:var(--ink);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.skip-link{position:fixed;left:18px;top:-70px;z-index:100;padding:10px 16px;background:var(--blue);color:var(--paper)}.skip-link:focus{top:10px}
.site-header{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:18px;height:64px;padding:0 max(24px,calc((100vw - var(--max))/2));background:var(--paper);border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:baseline;white-space:nowrap}.brand strong{font-size:24px;line-height:1;font-weight:850;color:var(--blue);letter-spacing:-.025em}.brand span{font-size:12px;color:var(--muted)}.site-header nav{display:flex;align-items:stretch;gap:2px;height:100%;margin-left:auto}.site-header nav a{display:flex;align-items:center;white-space:nowrap;padding:0 12px;font-size:13px;font-weight:650;border-bottom:3px solid transparent}.site-header nav a[aria-current],.site-header nav a:hover{color:var(--blue);border-bottom-color:var(--blue)}.theme-toggle,.nav-toggle{border:1px solid var(--line);border-radius:7px;min-height:36px;padding:6px 10px;background:var(--paper);color:var(--muted);font-size:12px;white-space:nowrap}.nav-toggle{display:none}.header-standard{color:var(--blue);font-size:12px;white-space:nowrap}
.portal-wrap{max-width:var(--max);margin:auto;padding:24px 0 36px}.portal-intro{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:20px}.portal-intro h1{margin:0;font-size:30px;line-height:1.35;letter-spacing:-.02em}.portal-intro p{margin:5px 0 0;color:var(--muted);font-size:14px}.intro-links{display:flex;gap:16px;font-size:13px;color:var(--blue)}.breadcrumbs{font-size:12px!important;margin-bottom:10px!important}.portal-columns{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px}.portal-main{min-width:0}.portal-aside{display:grid;align-content:start;gap:18px}.panel,.side-panel,.case-feature{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}.panel{padding:22px;margin-bottom:20px}.side-panel{padding:20px}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.panel-heading h2,.side-panel h2{margin:0;font-size:19px;line-height:1.45}.panel-heading>a{color:var(--blue);font-size:12px;white-space:nowrap}.aside-caption,.fine-print{font-size:12px;line-height:1.7;color:var(--muted)}.aside-caption{margin:8px 0 12px}.fine-print{margin:14px 0 0}.case-feature{padding:24px 26px}.case-feature-top{display:flex;align-items:center;justify-content:space-between;gap:16px}.section-label{font-size:13px;color:var(--blue);font-weight:700}.status-chip{display:inline-flex;align-items:center;min-height:24px;padding:3px 8px;border-radius:4px;background:var(--success-soft);color:var(--success);font-size:12px;white-space:nowrap;font-weight:600}.muted-chip{background:var(--canvas);color:var(--muted)}.case-feature h2{margin:10px 0 3px;font-size:28px;line-height:1.4;letter-spacing:-.025em}.case-feature>p{color:var(--muted);margin:0;font-size:14px}.metrics{display:grid;grid-template-columns:repeat(3,1fr);margin-top:20px}.metrics>div{padding-right:20px}.metrics>div+div{padding-left:24px;border-left:1px solid var(--line)}.metrics strong{display:block;color:var(--blue);font-size:34px;font-weight:750;line-height:1.2;font-variant-numeric:tabular-nums}.metrics span{color:var(--muted);font-size:13px}.metrics small{display:block;color:var(--muted);font-size:11px}.case-feature-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:20px;padding-top:17px}.case-feature-bottom p{margin:0;color:var(--muted);font-size:12px}.case-feature-bottom strong{color:var(--danger);font-weight:600;margin-right:12px}.button{display:inline-flex;justify-content:center;align-items:center;min-height:42px;padding:9px 17px;border-radius:7px;font-size:13px;font-weight:650;white-space:nowrap}.button.primary{background:var(--blue);color:var(--paper)}.button.primary:hover{background:var(--blue-deep)}.button.secondary{border:1px solid var(--line);color:var(--blue)}.channel-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:16px 0 20px}.channel-strip>a{padding:14px 16px;background:var(--paper);border:1px solid var(--line);border-radius:8px}.channel-strip strong{display:block;font-size:15px;color:var(--ink)}.channel-strip span{display:block;color:var(--muted);font-size:12px;margin-top:3px}.channel-strip>a:hover{border-color:var(--blue)}
.deadline-link{display:grid;grid-template-columns:48px minmax(0,1fr);gap:12px;padding:15px 0;border-bottom:1px solid var(--line)}.deadline-link time{padding-top:2px;color:var(--blue);font-size:15px;font-weight:700;font-variant-numeric:tabular-nums}.deadline-link strong{font-size:13px;font-weight:650;line-height:1.6;display:block}.deadline-link small{display:block;color:var(--muted);font-size:12px;margin-top:4px}.text-row{display:block;font-size:13px;line-height:1.7;padding-top:16px}.text-row span{display:block;color:var(--muted);font-size:12px}.resource-callout{background:var(--blue-soft)}.resource-callout p{font-size:13px;color:var(--muted)}.resource-callout>a{font-weight:650;font-size:13px;color:var(--blue)}
.content-search{display:flex;align-items:center;gap:8px;margin:0 0 15px}.content-search input{width:100%;min-width:0;min-height:42px;padding:9px 13px;border:1px solid var(--line);border-radius:7px;background:var(--canvas);color:var(--ink);font-size:13px}.content-search input::placeholder{color:var(--muted)}.content-search button,.empty-state button{border:0;border-radius:7px;background:var(--blue);color:var(--paper);min-height:42px;padding:9px 20px;white-space:nowrap;font-size:13px}.method-filters{display:flex;flex-wrap:wrap;gap:6px}.method-filters button{border:0;border-radius:6px;padding:7px 11px;min-height:34px;font-size:12px;background:var(--canvas);color:var(--muted)}.method-filters button[aria-pressed="true"]{background:var(--blue-soft);color:var(--blue);font-weight:700}.result-note{margin:13px 0;color:var(--muted);font-size:12px}.method-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:22px}.method-card{min-width:0;padding:18px 0;border-top:1px solid var(--line)}.method-meta{display:flex;align-items:center;gap:12px;font-size:11px;color:var(--muted)}.method-meta span:first-child{color:var(--blue)}.method-card h3{margin:7px 0;font-size:16px;line-height:1.55}.method-card p{font-size:12px;line-height:1.8;color:var(--muted);margin:0}.method-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px;font-size:11px;color:var(--muted)}.method-bottom a{color:var(--blue);font-size:12px;white-space:nowrap}.empty-state{padding:30px;background:var(--canvas);border-radius:8px;text-align:center}.empty-state h3{margin-top:0;font-size:18px}.empty-state p{color:var(--muted);font-size:13px}.starter-feature{display:grid;grid-template-columns:180px 1fr;align-items:center;gap:22px}.starter-feature img{width:180px;height:120px;object-fit:cover;border-radius:7px}.starter-feature h2,.starter-inline h2{font-size:19px;margin:0}.starter-feature p,.starter-inline p{font-size:13px;color:var(--muted);margin:8px 0}.starter-feature a,.starter-inline a{font-size:13px;color:var(--blue);font-weight:700}.starter-inline{display:flex;align-items:center;justify-content:space-between;gap:20px}.status-list{display:flex;flex-wrap:wrap;gap:8px}.status-list span{padding:5px 10px;background:var(--canvas);color:var(--muted);font-size:12px;border-radius:5px}
.competition-controls{display:flex;align-items:end;gap:16px}.competition-controls label{display:grid;gap:6px;font-size:12px;color:var(--muted)}.competition-controls input,.competition-controls select{min-height:40px;border:1px solid var(--line);border-radius:7px;padding:8px 11px;background:var(--canvas);color:var(--ink);font-size:13px;max-width:100%}.competition-search{flex:1;min-width:0}.competition-search input{min-width:0;width:100%}.competition-item{position:relative;padding:22px 0;border-top:1px solid var(--line);scroll-margin-top:90px}.competition-meta{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:12px}.competition-main{display:grid;grid-template-columns:minmax(0,1fr) 160px;gap:24px;margin-top:10px}.competition-main h2{font-size:19px;margin:0;line-height:1.5}.competition-main p{font-size:13px;color:var(--muted);line-height:1.8;margin:8px 0}.prize{text-align:right;align-self:center}.prize small{display:block;color:var(--muted);font-size:11px}.prize strong{display:block;color:var(--blue);font-size:19px;font-variant-numeric:tabular-nums}.competition-dates{display:flex;justify-content:space-between;flex-wrap:wrap;gap:5px 16px;color:var(--muted);font-size:11px;margin:10px 0}.competition-item>details{font-size:12px;color:var(--muted)}.competition-item summary{cursor:pointer;min-height:34px;display:flex;align-items:center}.competition-details{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:14px 0 20px}.competition-details h3{font-size:13px;color:var(--ink);margin:0}.competition-details ul{margin:7px 0 0;padding-left:16px;font-size:12px;line-height:1.85}.official-link{display:inline-flex;align-items:center;min-height:36px;color:var(--blue);font-size:13px;font-weight:650}.check-list{padding-left:18px;margin:14px 0;line-height:2.2;font-size:13px}
.page-shell{max-width:1180px;margin:24px auto 36px;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}.page-shell>header{padding-bottom:20px;border-bottom:1px solid var(--line)}.page-shell h1{font-size:32px;margin:0;line-height:1.35;letter-spacing:-.02em}.page-shell>header p{max-width:75ch;color:var(--muted);font-size:14px;line-height:1.8}.content-ledger{margin-top:18px}.content-ledger>article,.content-ledger>a{display:block;padding:20px 0;border-bottom:1px solid var(--line)}.content-ledger h2{font-size:20px;margin:0}.content-ledger h3{font-size:17px}.content-ledger p,.content-ledger li{color:var(--muted);font-size:14px;line-height:1.85}.article-body{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:36px;margin-top:24px}.article-copy{max-width:75ch}.article-copy section{margin-bottom:30px}.article-copy h2{font-size:23px;line-height:1.5;margin-top:0}.article-copy p,.article-copy li{font-size:15px;line-height:1.9}.article-aside{align-self:start;position:sticky;top:88px;background:var(--canvas);padding:20px;border-radius:8px}.article-aside dl{margin:0}.article-aside dl>div{padding:10px 0;border-bottom:1px solid var(--line)}.article-aside dt{font-size:12px;color:var(--muted)}.article-aside dd{margin:5px 0 0;font-size:14px;font-weight:650}.warning{display:grid;gap:7px;padding:16px;background:var(--danger-soft);color:var(--danger);font-size:13px;border-radius:7px}.warning span{font-size:12px}.status{background:var(--success-soft);color:var(--success);padding:4px 9px;border-radius:4px}.article-copy .metrics{margin-block:18px}
footer{display:flex;align-items:center;gap:28px;max-width:var(--max);margin:auto;padding:26px 0 30px;border-top:1px solid var(--line)}footer p{margin:0;color:var(--muted);font-size:12px}footer nav{display:flex;gap:18px;margin-left:auto;font-size:12px}
@media(max-width:1450px){.portal-wrap{margin-inline:24px}footer{margin-inline:24px}.site-header{padding-inline:24px}.site-header nav a{padding-inline:10px}}
@media(max-width:1180px){.brand span,.header-standard{display:none}.site-header nav a{padding-inline:8px;font-size:12px}.portal-columns{grid-template-columns:minmax(0,1fr) 265px;gap:18px}.case-feature h2{font-size:25px}.case-feature-bottom{align-items:start}.case-feature-bottom p span{display:block;margin-top:3px}.channel-strip{gap:8px}.channel-strip>a{padding:12px}.portal-intro h1{font-size:28px}.competition-main{grid-template-columns:minmax(0,1fr) 130px}.prize strong{font-size:17px}}
@media(max-width:960px){.portal-columns{grid-template-columns:1fr}.portal-aside{grid-template-columns:1fr 1fr}.portal-aside .resource-callout{grid-column:1/-1}.intro-links{display:none}.site-header nav a{padding-inline:7px}.theme-toggle{font-size:11px;padding:5px 7px}.brand strong{font-size:22px}.page-shell{margin-inline:24px}footer{flex-wrap:wrap}footer nav{margin-left:0}.competition-controls{flex-wrap:wrap}.competition-search{flex-basis:100%}}
@media(max-width:760px){html{scroll-padding-top:76px}.site-header{height:58px;padding-inline:16px;gap:10px}.brand span{display:inline;font-size:11px}.nav-toggle{display:block;margin-left:auto;min-height:40px}.theme-toggle{min-height:40px}.site-header nav{display:none;position:absolute;top:58px;left:0;right:0;height:auto;margin:0;padding:10px 16px;background:var(--paper);border-bottom:1px solid var(--line);grid-template-columns:repeat(4,1fr);gap:3px}.site-header nav.is-open{display:grid}.site-header nav a{min-height:42px;justify-content:center;font-size:12px;padding:6px 0}.portal-wrap{padding-top:18px;margin-inline:14px}.portal-intro{margin-bottom:16px}.portal-intro h1{font-size:26px}.portal-intro p{font-size:12px;line-height:1.8}.case-feature{padding:18px}.case-feature h2{font-size:23px}.case-feature>p{font-size:12px}.metrics{margin-top:18px}.metrics strong{font-size:30px}.metrics>div{padding-right:10px}.metrics>div+div{padding-left:15px}.case-feature-bottom{display:block;padding-top:14px;margin-top:16px}.case-feature-bottom p span{display:inline}.case-feature-bottom .button{margin-top:12px;min-height:42px}.channel-strip{grid-template-columns:repeat(2,1fr);margin-block:12px 16px}.channel-strip>a{padding:11px 13px}.panel{padding:16px;margin-bottom:16px}.panel-heading{margin-bottom:12px}.panel-heading h2{font-size:18px}.method-grid{grid-template-columns:1fr}.method-card{padding-block:15px}.method-card h3{font-size:16px}.method-card p{font-size:13px}.method-filters{gap:6px}.method-filters button{min-height:40px;padding:7px 10px}.method-bottom{font-size:12px}.method-bottom a{min-height:36px;display:flex;align-items:center}.portal-aside{grid-template-columns:1fr}.side-panel{padding:18px}.starter-feature{grid-template-columns:100px minmax(0,1fr);gap:14px}.starter-feature img{width:100px;height:110px}.starter-feature h2{font-size:17px}.starter-feature p{font-size:12px}.starter-inline{display:block}.starter-inline>a{display:inline-flex;align-items:center;min-height:40px}.status-list span{font-size:11px}.competition-main{grid-template-columns:1fr;gap:0}.prize{text-align:left;display:flex;align-items:center;gap:12px;margin-top:8px}.competition-dates{font-size:12px}.competition-details{grid-template-columns:1fr}.competition-details li{font-size:13px}.competition-item summary{min-height:44px}.official-link{min-height:44px}.competition-controls{gap:12px}.competition-controls label{flex:1 1 120px}.competition-controls .competition-search{flex:1 1 100%}.page-shell{margin:18px 14px;padding:18px}.page-shell h1{font-size:28px}.article-body{grid-template-columns:1fr;gap:22px}.article-aside{position:static;order:-1}.article-aside dl{display:grid;grid-template-columns:1fr 1fr;gap:0 15px}.article-copy .metrics{grid-template-columns:repeat(3,1fr)}.article-copy h2{font-size:21px}footer{margin-inline:16px;padding-top:20px;gap:12px}footer nav{flex-wrap:wrap;gap:15px}footer nav a{min-height:36px;display:flex;align-items:center}.content-search button{padding-inline:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}