/* 无尽 Lab 共用样式：沿用 wujinseed.com 的深色品牌 */
:root{
  --bg:#05080a;--bg2:#0a1013;--bg3:#10171b;--panel:rgba(255,255,255,.025);
  --line:rgba(255,255,255,.08);--line2:rgba(255,255,255,.14);
  --text:#e8eee9;--muted:#8b978f;--dim:#5b665f;
  --lime:#a6f25c;--teal:#5ee6d0;--gold:#f0c86a;--red:#ff8a7a;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --mono:"SF Mono","JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  --gut:clamp(16px,5vw,64px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);font-family:var(--sans);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
::selection{background:var(--lime);color:#000}
code{font-family:var(--mono);font-size:.92em;color:var(--teal)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px var(--gut);background:rgba(5,8,10,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;letter-spacing:.02em;white-space:nowrap}
.brand svg{width:28px;height:28px;flex:none}
.brand small{font-family:var(--mono);font-size:11px;color:var(--muted);font-weight:400;letter-spacing:.12em;margin-left:2px}
.links{display:flex;align-items:center;gap:26px;font-size:14px;color:var(--muted)}
.links a:hover,.links a.on{color:var(--text)}
.links a.cta{color:var(--lime);border:1px solid rgba(166,242,92,.45);border-radius:99px;padding:5px 14px;font-size:13px}
.links a.cta:hover{background:var(--lime);color:#071006}
.links a{white-space:nowrap}
@media (max-width:760px){.links a.hide-m{display:none}.links{gap:14px}.nav{gap:10px}}
@media (max-width:420px){.brand small{display:none}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;border-radius:99px;font-size:15px;font-weight:500;border:1px solid var(--line2);transition:all .25s;cursor:pointer;background:none;color:var(--text);font-family:inherit}
.btn.primary{background:var(--lime);color:#071006;border-color:var(--lime)}
.btn.primary:hover{box-shadow:0 0 0 6px rgba(166,242,92,.15),0 0 40px rgba(166,242,92,.35)}
.btn.ghost:hover{border-color:var(--text)}
.btn svg{width:16px;height:16px}
.btn-s{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:7px;font-size:13px;border:1px solid var(--line2);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-family:inherit;transition:border-color .2s,background .2s}
.btn-s:hover{border-color:var(--lime)}
.btn-s.ghost{background:none;color:var(--muted)}
.btn-s.pri{background:var(--lime);border-color:var(--lime);color:#071006;font-weight:600}
.btn-s:disabled{opacity:.5;cursor:progress}

footer{display:flex;justify-content:space-between;align-items:center;gap:12px 20px;flex-wrap:wrap;padding:24px var(--gut) 30px;border-top:1px solid var(--line);font-size:13px;color:var(--dim)}
footer .brand{color:var(--muted);font-size:14px;font-weight:500}
footer .brand svg{width:20px;height:20px}
footer .icp{flex-basis:100%;text-align:center}
footer .icp:hover{color:var(--muted)}

/* ================= 工作台 ================= */
.wb{display:grid;grid-template-columns:200px minmax(0,1fr) 300px;min-height:calc(100vh - 57px);border-bottom:1px solid var(--line)}
.wb>aside,.wb>main{min-width:0}
#toolnav{padding:20px 12px;border-right:1px solid var(--line);background:var(--bg2)}
.tg{margin-bottom:18px}
.tg-h{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:var(--lime);padding:0 10px 8px;text-transform:uppercase}
#toolnav a{display:block;padding:7px 10px;border-radius:8px;font-size:14px;color:var(--muted);line-height:1.35}
#toolnav a small{display:block;font-family:var(--mono);font-size:10.5px;color:var(--dim);letter-spacing:.02em}
#toolnav a:hover{background:rgba(255,255,255,.04);color:var(--text)}
#toolnav a.on{background:rgba(166,242,92,.1);color:var(--text)}
#toolnav a.on small{color:var(--lime)}

.wb main{padding:22px clamp(16px,2.4vw,32px) 40px}
.th{display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.th h1{font-size:24px;font-weight:620;letter-spacing:-.01em}
.th .en{font-family:var(--mono);font-size:12px;color:var(--dim);letter-spacing:.06em}
.tdesc{color:var(--muted);font-size:14px;margin:4px 0 18px}

#data{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:14px 16px;margin-bottom:18px}
.inp+.inp{border-top:1px dashed var(--line2);margin-top:14px;padding-top:14px}
.inp-h{display:flex;align-items:baseline;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.inp-h b{font-size:14px;font-weight:600}
.inp-h .src{font-family:var(--mono);font-size:11.5px;color:var(--muted)}
.inp-act{display:flex;gap:8px;flex-wrap:wrap}
.drop{margin-top:10px}
.drop textarea{width:100%;min-height:120px;background:var(--bg);color:var(--text);border:1px solid var(--line2);border-radius:8px;padding:8px 10px;font:12px/1.5 var(--mono);resize:vertical;margin-bottom:6px}
.help{font-size:12.5px;color:var(--muted);margin-top:10px}
.note{font-size:12px;color:var(--gold);margin-top:6px}
.cols{display:flex;flex-wrap:wrap;gap:8px 14px;margin-top:12px}
.col{display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted)}
.col select{max-width:160px}
.col.miss span{color:var(--red)}
.col.miss select{border-color:var(--red)}
.col.multi{flex-basis:100%;align-items:flex-start}
.col.multi .chk{display:flex;flex-wrap:wrap;gap:4px 12px}
.col.multi label{display:flex;gap:4px;align-items:center;font-family:var(--mono);font-size:11.5px}
.privacy{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--teal);margin-top:12px}

.stage{position:relative}
#paper{background:#fff;border-radius:10px;padding:14px;overflow:auto;min-height:280px;display:flex;align-items:flex-start;justify-content:center;box-shadow:0 0 0 1px var(--line2)}
#paper svg{max-width:100%;height:auto;display:block}
#paper .empty{color:#666;font-size:14px;align-self:center;padding:40px 10px;text-align:center}
.notes{margin-top:12px;font-size:13px;color:var(--muted);border-left:2px solid var(--lime);padding:2px 0 2px 12px}
.notes:empty{display:none}
.notes p+p{margin-top:2px}
.notes .meta{font-family:var(--mono);font-size:11px;color:var(--dim)}
.notes.bad{border-color:var(--red);color:var(--red)}

.wb>aside.side{border-left:1px solid var(--line);background:var(--bg2);padding:18px 16px 30px;display:flex;flex-direction:column;gap:16px}
#export{border:1px solid rgba(166,242,92,.35);border-radius:12px;padding:12px;background:rgba(166,242,92,.04)}
#export .eh{font-size:13px;font-weight:600;margin-bottom:8px;display:flex;justify-content:space-between;align-items:center}
#export .eh select{font-size:12px}
#export .row{display:flex;gap:6px;flex-wrap:wrap}
#export p{font-size:11.5px;color:var(--dim);margin-top:8px}
#opts fieldset{border:none;border-top:1px solid var(--line);padding:12px 0 4px}
#opts legend{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--lime);padding-right:8px}
.f{display:flex;flex-direction:column;gap:4px;font-size:12.5px;color:var(--muted);margin-bottom:10px}
.f[hidden]{display:none}
.f.bool{flex-direction:row;align-items:center;gap:8px;color:var(--text)}
.f.number{flex-direction:row;align-items:center;justify-content:space-between;gap:10px}
.f.number input{width:86px}
.f.color{flex-direction:row;align-items:center;justify-content:space-between}
.clr{display:flex;gap:6px;align-items:center}
.clr input[type=color]{width:30px;height:26px;padding:0;border:1px solid var(--line2);border-radius:6px;background:none;cursor:pointer}
.clr input[type=text]{width:78px;font-family:var(--mono)}
.sw{display:flex;gap:2px;margin:2px 0}
.sw i{width:16px;height:10px;border-radius:2px;display:block}
input[type=text],input[type=number],input[type=search],select,textarea{background:var(--bg);color:var(--text);border:1px solid var(--line2);border-radius:6px;padding:5px 8px;font:13px var(--sans);outline:none}
.f textarea{font:12px/1.5 var(--mono);resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--lime)}
input[type=checkbox]{accent-color:var(--lime);width:15px;height:15px}

@media (max-width:1180px){
  .wb{grid-template-columns:180px minmax(0,1fr)}
  .wb>aside.side{grid-column:2;border-left:none;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:0 24px;align-items:start}
  #export{grid-column:1/-1;margin-bottom:12px}
  #opts{display:contents}
}
@media (max-width:760px){
  .wb{grid-template-columns:minmax(0,1fr)}
  #toolnav{border-right:none;border-bottom:1px solid var(--line);display:flex;gap:6px;overflow-x:auto;padding:10px 16px}
  .tg{display:flex;gap:4px;margin:0;flex:none}
  .tg-h{display:none}
  #toolnav a{white-space:nowrap;padding:6px 10px}
  #toolnav a small{display:none}
  .wb>aside.side{grid-column:1}
}

/* ================= AI 页面（前沿速递 / 论文解读 / 写作助手） ================= */
.page{max-width:1080px;margin:0 auto;padding:clamp(32px,5vw,56px) var(--gut) 72px}
.page-h{margin-bottom:26px}
.page-h .kicker{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:var(--lime);margin-bottom:10px;text-transform:uppercase}
.page-h h1{font-size:clamp(28px,3.6vw,40px);font-weight:620;letter-spacing:-.01em}
.page-h p{color:var(--muted);font-size:15.5px;margin-top:8px;max-width:720px}
.aibadge{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--gold);border:1px solid rgba(240,200,106,.4);border-radius:99px;padding:2px 10px;margin-top:12px}
.panel{border:1px solid var(--line);border-radius:14px;background:var(--panel);padding:18px 20px}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.tabs button{font:inherit;font-size:14px;padding:6px 14px;border-radius:99px;border:1px solid var(--line2);background:none;color:var(--muted);cursor:pointer}
.tabs button.on{background:rgba(166,242,92,.12);border-color:rgba(166,242,92,.5);color:var(--text)}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:12px;font-size:13px;color:var(--muted)}
.field input[type=text],.field textarea{width:100%;font-size:14px;padding:9px 12px}
.field textarea{min-height:180px;resize:vertical;font:14px/1.6 var(--sans)}
.filebox{display:flex;align-items:center;justify-content:center;flex-direction:column;gap:6px;border:1.5px dashed var(--line2);border-radius:12px;padding:30px 16px;color:var(--muted);font-size:14px;cursor:pointer;text-align:center}
.filebox:hover,.filebox.over{border-color:var(--lime);color:var(--text)}
.filebox b{color:var(--text);font-weight:500}
.actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:6px}
.hint{font-size:12.5px;color:var(--dim)}
.result{margin-top:22px}
.result-h{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:10px}
.result-h .src{font-size:13px;color:var(--muted)}
.out{border:1px solid var(--line);border-radius:14px;background:var(--bg2);padding:22px 26px;min-height:120px}
.out.streaming .md>*:last-child::after{content:"▍";color:var(--lime);animation:blink 1s steps(2) infinite;margin-left:2px}
@keyframes blink{50%{opacity:0}}
.err{color:var(--red);font-size:14px}
.md{font-size:15px;line-height:1.75;color:var(--text)}
.md h2{font-size:19px;margin:22px 0 8px;color:var(--lime);font-weight:600}
.md h2:first-child{margin-top:0}
.md h3{font-size:16.5px;margin:18px 0 6px}
.md h4{font-size:15px;margin:14px 0 4px}
.md p{margin:8px 0}
.md ul,.md ol{margin:8px 0 8px 22px}
.md li{margin:3px 0}
.md code{background:rgba(255,255,255,.06);padding:1px 5px;border-radius:4px}
.md a{color:var(--teal);border-bottom:1px solid rgba(94,230,208,.35)}
.md hr{border:none;border-top:1px solid var(--line);margin:16px 0}
.md .wait{color:var(--muted)}
.md .tbl{overflow-x:auto;margin:10px 0}
.md table{border-collapse:collapse;font-size:13.5px;min-width:60%}
.md th,.md td{border:1px solid var(--line2);padding:6px 10px;text-align:left;vertical-align:top}
.md th{background:rgba(255,255,255,.04)}
.disclaim{margin-top:14px;font-size:12.5px;color:var(--dim);line-height:1.7}

/* 前沿速递 */
.filters{display:flex;flex-direction:column;gap:12px;margin-bottom:22px}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chips button{font:inherit;font-size:13px;padding:4px 12px;border-radius:99px;border:1px solid var(--line2);background:none;color:var(--muted);cursor:pointer}
.chips button.on{border-color:var(--lime);color:var(--lime);background:rgba(166,242,92,.08)}
.chips button small{opacity:.6;margin-left:4px}
.search{max-width:360px;width:100%;font-size:14px;padding:8px 12px}
.day{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--dim);margin:26px 0 10px;text-transform:uppercase}
.news{display:grid;gap:12px}
.ncard{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:16px 18px;transition:border-color .2s}
.ncard:hover{border-color:var(--line2)}
.nmeta{display:flex;flex-wrap:wrap;gap:6px 12px;align-items:center;font-size:12px;color:var(--dim);margin-bottom:6px}
.nmeta .kind{color:var(--teal)}
.nmeta .tag{color:var(--gold);border:1px solid rgba(240,200,106,.3);border-radius:99px;padding:0 7px}
.ncard h3{font-size:16.5px;font-weight:600;line-height:1.45}
.ncard .orig{font-size:13px;color:var(--muted);margin-top:3px;line-height:1.45}
.ncard .sum{font-size:14.5px;color:var(--text);margin-top:8px;opacity:.88}
.ncard .nact{display:flex;gap:16px;margin-top:10px;font-size:13px}
.ncard .nact a{color:var(--lime)}
.ncard .nact a.dim{color:var(--muted)}
.empty-state{color:var(--muted);text-align:center;padding:60px 10px;border:1px dashed var(--line2);border-radius:14px}

/* 写作助手 */
.modes{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:8px;margin-bottom:16px}
.modes button{font:inherit;text-align:left;padding:12px 14px;border-radius:12px;border:1px solid var(--line);background:var(--panel);color:var(--text);cursor:pointer;transition:border-color .2s}
.modes button b{display:block;font-size:14.5px;font-weight:600}
.modes button small{display:block;font-size:12px;color:var(--muted);margin-top:2px;line-height:1.4}
.modes button.on{border-color:var(--lime);background:rgba(166,242,92,.07)}
[hidden]{display:none!important}
.md h3{color:var(--lime);font-size:17.5px;font-weight:600}
.md>*:first-child{margin-top:0}
@media (max-width:760px){
  .out{padding:18px 16px}
}
/* 手机上导航只剩「联系试单」，在页头下方补一排功能入口 */
.mnav{display:none;gap:8px;overflow-x:auto;padding:10px var(--gut);border-bottom:1px solid var(--line);font-size:13.5px;scrollbar-width:none}
.mnav a{white-space:nowrap;color:var(--muted);padding:4px 12px;border:1px solid var(--line2);border-radius:99px}
.mnav a.on{color:var(--lime);border-color:rgba(166,242,92,.5)}
@media (max-width:760px){.mnav{display:flex}}

/* 组图拼版 */
.tray{border:1px solid var(--line2);border-radius:12px;padding:12px}
.tray .eh{font-size:13px;font-weight:600;margin-bottom:8px;display:flex;justify-content:space-between}
.tray .eh .cnt{color:var(--lime);font-weight:500}
.tray .row{display:flex;gap:6px;flex-wrap:wrap}
.tray p{font-size:11.5px;color:var(--dim);margin-top:8px}
.composer{position:fixed;inset:0;z-index:50;background:var(--bg);display:flex;flex-direction:column}
.cp-bar{display:flex;align-items:center;gap:14px;padding:12px var(--gut);border-bottom:1px solid var(--line)}
.cp-bar b{font-size:16px}
.cp-bar .cp-size{font-family:var(--mono);font-size:12px;color:var(--muted);flex:1}
.cp-body{flex:1;display:grid;grid-template-columns:minmax(0,1fr) 320px;min-height:0}
.cp-stage{overflow:auto;padding:24px;display:flex;align-items:flex-start;justify-content:center;background:#1a1f22}
.cp-stage>svg{max-width:100%;height:auto;box-shadow:0 4px 30px rgba(0,0,0,.5)}
.cp-side{overflow:auto;border-left:1px solid var(--line);background:var(--bg2);padding:16px;display:flex;flex-direction:column;gap:14px}
#cpexport{border:1px solid rgba(166,242,92,.35);border-radius:12px;padding:12px;background:rgba(166,242,92,.04)}
#cpexport .eh{font-size:13px;font-weight:600;margin-bottom:8px;display:flex;justify-content:space-between;align-items:center}
#cpexport .row{display:flex;gap:6px;flex-wrap:wrap}
#cpexport p{font-size:11.5px;color:var(--dim);margin-top:8px}
.cp-side fieldset{border:none;border-top:1px solid var(--line);padding-top:10px}
.cp-side legend{font-size:12px;color:var(--muted);padding-right:8px}
.cp-side .f{display:flex;flex-direction:row;text-align:left;justify-content:space-between;align-items:center;gap:10px;font-size:13px;margin:7px 0}
.cp-side .f input[type=number]{width:90px}
.cp-side .f.bool{justify-content:flex-start}
.cp-item{display:flex;align-items:center;gap:6px;font-size:13px;margin:6px 0}
.cp-item b{color:var(--lime);width:26px}
.cp-item span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.cp-item label{font-size:12px;color:var(--muted);white-space:nowrap}
.cp-item .btn-s{padding:2px 7px}
.cp-warn{font-size:12px;color:var(--gold);line-height:1.6}
@media (max-width:760px){.cp-body{grid-template-columns:1fr;grid-template-rows:auto auto;overflow:auto}.cp-stage{padding:12px}.cp-side{border-left:none;border-top:1px solid var(--line)}}