:root{--bg:var(--paper-bg);--panel:var(--paper-panel);--line:var(--paper-line);--muted:var(--paper-muted);--text:var(--paper-text);--accent:var(--paper-accent);--soft:var(--paper-soft);--good:var(--paper-good);--bad:var(--paper-bad);--serif:"Noto Serif SC","Songti SC",SimSun,serif;--sans:"Noto Sans SC","Microsoft YaHei",system-ui,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.75 var(--sans)}header{min-height:78px;border-bottom:1px solid var(--line);padding:14px max(28px,calc((100% - 1320px)/2));display:flex;align-items:center;gap:32px;background:var(--panel)}header strong{font:700 23px var(--serif);white-space:nowrap}header>span{color:var(--muted);font-size:13px}main{max-width:1376px;margin:auto;padding:40px 28px 70px}h1,h2,h3,h4{font-family:var(--serif);color:var(--text);overflow-wrap:anywhere}h1{font-size:32px;line-height:1.5;margin:0 0 12px}h2{font-size:23px;line-height:1.5;margin:0 0 16px}h3{font-size:19px;margin:0 0 10px}h4{font-size:16px;margin:16px 0 8px}p{margin:8px 0 20px}.muted,small{color:var(--muted)}small{font-size:12px}nav{display:flex;gap:26px;flex-wrap:wrap;align-items:center}header nav{align-self:stretch}button,.button{border:1px solid var(--line);background:transparent;color:var(--text);border-radius:5px;padding:10px 18px;font:500 14px/1.6 var(--sans);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:background .16s,border-color .16s;min-height:42px}button:hover,.button:hover{border-color:var(--accent);background:var(--soft)}button.primary,.button.primary{background:var(--accent);color:var(--paper-on-accent);border-color:var(--accent)}button.primary:hover,.button.primary:hover{background:var(--paper-accent-hover)}nav button{border:0;border-bottom:2px solid transparent;border-radius:0;min-height:48px;padding:8px 0;color:var(--muted)}nav button.active{border-bottom-color:var(--accent);color:var(--paper-link)}nav .button{border:0;color:var(--muted);font-size:12px;padding:8px 0}button:disabled{opacity:.45;cursor:not-allowed}button.danger,.danger{color:var(--bad)}a{color:var(--paper-link)}input,select,textarea{width:100%;background:var(--paper-input);border:1px solid var(--paper-input-border);color:var(--text);padding:12px 14px;border-radius:5px;font:inherit;min-width:0}textarea{min-height:112px;resize:vertical}input[type=checkbox],input[type=radio]{width:18px;height:18px;flex-shrink:0;accent-color:var(--accent)}label{display:block;margin:16px 0 8px;font-weight:500}label.inline{display:flex;gap:10px;align-items:center}input:focus,select:focus,textarea:focus{outline:2px solid var(--paper-focus);border-color:var(--accent);outline-offset:2px}.panel,.card{background:var(--panel);border:1px solid var(--line);border-radius:6px;padding:26px;margin:0 0 22px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(275px,100%),1fr));gap:20px}.split{display:grid;grid-template-columns:1fr 1fr;gap:24px}.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.between{justify-content:space-between}.badge{display:inline-block;font:12px/1.8 var(--sans);padding:3px 10px;background:var(--paper-badge);border-radius:4px;color:var(--paper-badge-text);white-space:nowrap}.badge.good{color:var(--good);background:var(--paper-good-bg)}.badge.bad{color:var(--bad);background:var(--paper-bad-bg)}.stats{display:flex;gap:0;flex-wrap:wrap;margin:26px 0 32px}.stat{flex:1;min-width:120px;border-right:1px solid var(--line);padding:4px 22px}.stat:first-child{padding-left:0}.stat:last-child{border-right:0}.stat b{display:block;font:700 30px/1.5 var(--serif)}.stat span{color:var(--muted);font-size:12px}.alert{padding:14px 18px;border:1px solid var(--paper-alert-border);background:var(--paper-alert-bg);border-radius:5px;margin:16px 0;color:var(--paper-alert-text)}.alert.error{border-color:var(--paper-bad-border);background:var(--paper-bad-bg);color:var(--bad)}.hidden{display:none!important}.login{max-width:470px;margin:60px auto;padding:38px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;text-align:left;font-size:14px}td,th{border-bottom:1px solid var(--line);padding:14px 12px;vertical-align:top}th{color:var(--muted);font-weight:500;white-space:nowrap}pre,.answer-text{font-family:inherit;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.95;margin:14px 0}details{border-top:1px solid var(--line);margin-top:16px;padding-top:14px}summary{cursor:pointer;color:var(--muted);min-height:32px}summary:hover{color:var(--accent)}.answers{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;margin:28px 0}.answer{min-width:0;border:0;border-radius:0;background:transparent;padding:0 30px 0 0;margin:0}.answer:nth-child(even){border-left:1px solid var(--line);padding:0 0 0 30px}.answer:nth-child(n+3){border-top:1px solid var(--line);padding-top:28px;margin-top:28px}.answer .answer-text{font-size:15px;min-height:70px}.answer details{border:0;background:var(--paper-reasoning);padding:12px 16px;border-radius:4px;margin:16px 0}.answer details pre{max-height:300px;overflow:auto;font-size:13px;color:var(--muted)}.choice{border:1px solid var(--line);border-radius:5px;padding:12px 18px;margin:0;min-width:160px;cursor:pointer;background:var(--panel)}.choice:has(input:checked){border-color:var(--accent);background:var(--soft);color:var(--paper-link)}.progress{height:4px;background:var(--line);border-radius:4px;margin:18px 0 30px}.progress div{height:100%;background:var(--accent);border-radius:4px;transition:width .3s}.question{border-left:2px solid var(--accent);padding:14px 20px;background:var(--paper-sunken);white-space:pre-wrap;margin:20px 0;overflow-wrap:anywhere}#question-display{font:700 28px/1.65 var(--serif);background:transparent;border:0;padding:18px 0 0;margin:24px 0 18px}#question-display:before{content:'本轮问题';display:block;font:500 12px/1.5 var(--sans);color:var(--muted);margin-bottom:10px}.narrow{max-width:760px;margin:36px auto}#welcome>h1{font-size:38px}#welcome>.panel{margin-top:32px;padding:32px}#welcome ol{padding-left:22px;line-height:2.3}footer{font-size:12px;color:var(--muted);margin-top:28px}.bar{height:6px;background:var(--paper-line);border-radius:4px;margin:12px 0}.bar div{background:var(--accent);height:100%;border-radius:4px}.dialog{position:fixed;inset:0;background:var(--paper-overlay);backdrop-filter:blur(4px);z-index:20;padding:5vh 20px;overflow:auto}.dialog>.panel{max-width:780px;margin:auto;padding:30px}.dialog h2{margin:0}.dialog label{font-size:13px}.loading{color:var(--accent)}button.linklike{background:transparent;padding:6px 10px;border-color:transparent}.model-options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.model-options label{margin:0;padding:12px;background:var(--paper-bg);border:1px solid var(--line);border-radius:5px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}#toast{position:fixed;bottom:24px;right:24px;max-width:480px;z-index:50;box-shadow:0 6px 28px var(--paper-shadow)}.workspace{display:grid;grid-template-columns:350px minmax(0,1fr);gap:36px;min-height:570px}.study-list{border-right:1px solid var(--line);padding-right:28px}.list-heading{margin-bottom:26px}.study-item{width:100%;display:block;text-align:left;border:0;border-bottom:1px solid var(--line);border-radius:0;padding:22px 16px;margin:0;background:transparent}.study-item.selected{border-left:3px solid var(--accent);background:var(--soft)}.study-item h3{font-size:19px;margin:0}.study-item .row{gap:8px}.study-item .list-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin-top:12px}.workspace-detail{min-width:0;padding:0 0 24px}.detail-heading h1{font-size:28px;margin:0}.detail-heading{align-items:flex-start}.detail-description{color:var(--muted);white-space:pre-wrap;overflow-wrap:anywhere;margin:18px 0 30px}.detail-section{border-top:1px solid var(--line);margin-top:30px;padding-top:24px}.version-row{border:1px solid var(--line);border-radius:5px;padding:16px 18px;margin:12px 0}.version-actions{display:flex;gap:4px;flex-wrap:wrap;margin-top:12px}.version-actions button,.version-actions .button{font-size:12px;padding:6px 10px;min-height:34px}.study-summary{font-size:13px;color:var(--muted);margin:14px 0 24px}#app>.page-heading{margin-bottom:32px}#app>.page-heading h1{margin:0}#history{background:var(--paper-sunken);border-radius:5px;padding:20px 24px;margin:28px 0}#history>h2{font-size:18px;margin-bottom:6px}#history>p{font-size:12px;margin:0 0 12px}.history-turn{background:transparent;border:0;border-top:1px solid var(--paper-line);border-radius:0;margin:0;padding:12px 0}.history-turn .question{padding:6px 12px;font-size:14px;margin:10px 0}.history-turn .answers{margin:16px 0}.history-turn .answer h3{font-size:17px}.history-turn .answer-text{font-size:13px;max-height:240px;overflow:auto}.history-turn .answer details{background:var(--paper-reasoning-nested)}#vote-panel{border:0;border-top:1px solid var(--line);background:transparent;border-radius:0;padding:24px 0;margin-top:34px}#vote-panel h2{font-size:20px;margin:0}#vote-panel>p{font-size:12px;margin:4px 0 18px}.vote-controls{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}#vote-options{display:flex;gap:12px;flex-wrap:wrap;flex:1}#ask-panel{margin-top:30px}#reveal{padding:32px}#results>.row>div{min-width:150px}#models>.grid{margin-top:28px}#models .card p{overflow-wrap:anywhere}#models .card{border-top:2px solid var(--paper-line)}.admin-note{margin-left:auto;color:var(--muted);font-size:12px}#logout{font-size:12px;min-height:34px;padding:6px 12px}
@media(max-width:1050px){header{gap:22px;flex-wrap:wrap}header nav{order:3;flex-basis:100%;gap:24px}.workspace{grid-template-columns:280px minmax(0,1fr);gap:24px}.study-list{padding-right:20px}.detail-heading h1{font-size:25px}.stat{padding:4px 14px}.stat b{font-size:26px}}
@media(max-width:760px){main{padding:26px 18px 50px}header{padding:16px 18px;gap:12px;min-height:68px}header>span{display:none}header strong{font-size:21px}header nav{gap:20px;overflow-x:auto;flex-wrap:nowrap}nav button{white-space:nowrap}.workspace{grid-template-columns:1fr;gap:28px}.study-list{border-right:0;padding:0;border-bottom:1px solid var(--line);padding-bottom:18px}.study-item{padding:16px}.list-heading{margin-bottom:16px}.split,.answers,.model-options{grid-template-columns:1fr}.answer,.answer:nth-child(even){padding:20px 0;border:0;border-bottom:1px solid var(--line)}.answer:nth-child(n+3){margin:0;padding-top:20px}.answers{margin:16px 0;gap:0}h1{font-size:27px}h2{font-size:21px}#welcome>h1{font-size:30px}.panel,.card,#welcome>.panel,#reveal{padding:22px}.login{margin:25px auto}.stats{gap:16px}.stat{min-width:100px;flex-basis:40%;padding:0;border:0}.stat b{font-size:27px}.detail-heading h1{font-size:26px}.detail-heading>.row{width:100%}.version-row{padding:16px}.version-actions{gap:6px}.version-actions button,.version-actions .button{min-height:40px}.admin-note{display:none}#history{padding:18px}.history-turn .answer-text{max-height:280px}#question-display{font-size:24px}#vote-options{width:100%}.choice{flex:1;min-width:120px}#submit-vote{width:100%}.vote-controls{gap:16px}#toast{right:16px;left:16px;bottom:16px;max-width:none}.dialog{padding:16px}.dialog>.panel{padding:22px}.dialog .row h2{font-size:21px}.narrow{margin:20px auto}#app>.page-heading{margin-bottom:22px}#results .row>div{flex:1}footer{line-height:1.8}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
#app[data-tab=studies]>.page-heading{display:none}.list-heading h1{margin:0}.list-heading .primary{padding:9px 13px;font-size:13px}.study-summary{margin-bottom:24px}.workspace{padding-top:4px}#admin-nav .button{white-space:nowrap}.history-turn>summary{font-weight:600;color:var(--paper-alert-text)}@media(max-width:760px){.workspace{padding-top:0}.list-heading h1{font-size:28px}.study-summary{margin:8px 0 16px}}
:root{--sans:"Microsoft YaHei","Noto Sans SC",system-ui,sans-serif}.history-turn .answer>.answer-text{max-height:90px;min-height:0;margin:8px 0;font-size:13px}.history-turn .answer>h3{display:none}.history-turn .answer details{padding:4px 10px;margin:6px 0}.history-turn .answer details summary{min-height:24px;font-size:12px}.history-turn .answers{margin:10px 0}.history-turn .answer .row h3{font-size:16px;margin:0}.history-turn .answer .row .badge{font-size:11px}.history-turn .answer details[open] pre{max-height:200px}.history-turn .question{margin:8px 0}#history>h2{display:none}#history>p{margin-bottom:6px}#history{padding:16px 22px}.history-turn{padding:8px 0}.history-turn:first-child{border-top:0;padding-top:0}@media(max-width:760px){.history-turn .answer>.answer-text{max-height:120px}.history-turn .answer{padding:10px 0}#history{padding:16px}.history-turn .answer details{margin:4px 0}}

/* Native controls and selected text use the same accessible palette. */
input::placeholder,textarea::placeholder{color:var(--paper-muted);opacity:1}option{background:var(--paper-input);color:var(--paper-text)}html{scrollbar-color:var(--paper-input-border) var(--paper-bg)}