:root{
  --bg:#f6f6f4; --card:#fff; --ink:#1d1d1f; --muted:#6b6b70;
  --line:#e2e2de; --accent:#8a5a2b; --accent-soft:#f2ece4;
  --keep:#3f7d58; --edit:#b4801f; --drop:#a4453a;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#17171a; --card:#1f1f23; --ink:#e9e9ea; --muted:#9a9aa1;
         --line:#32323a; --accent:#d0a273; --accent-soft:#2a2620; }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.85 "Songti SC","SimSun",-apple-system,"PingFang SC","Microsoft YaHei",serif;}

.bar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  gap:1rem;padding:.7rem 1.4rem;background:var(--card);border-bottom:1px solid var(--line);flex-wrap:wrap}
.bar-l{display:flex;align-items:baseline;min-width:0}
.bar-title{font-weight:700;font-size:1.02rem;letter-spacing:.02em}
.bar-sub{color:var(--muted);font-size:.8rem;margin-left:.7rem}
.bar-r{display:flex;align-items:center;gap:.8rem}
.status{font-size:.78rem;color:var(--muted);font-family:system-ui,sans-serif}
.status.dirty{color:var(--edit)} .status.ok{color:var(--keep)} .status.err{color:var(--drop)}
.btn{font:600 .85rem/1 system-ui,sans-serif;padding:.55rem 1.1rem;border:1px solid var(--accent);
  border-radius:6px;background:var(--accent);color:#fff;cursor:pointer}
.btn:hover{opacity:.88} .btn:disabled{opacity:.45;cursor:default}
.back{text-decoration:none;color:var(--muted);font-size:1.1rem;margin-right:.5rem}
.back:hover{color:var(--accent)}

.wrap{display:grid;grid-template-columns:250px minmax(0,1fr);gap:1.6rem;
  max-width:1160px;margin:0 auto;padding:1.6rem 1.4rem 5rem}
@media(max-width:820px){.wrap{grid-template-columns:1fr;gap:1rem}}

.nav{position:sticky;top:4.4rem;align-self:start;display:flex;flex-direction:column;gap:.3rem}
@media(max-width:820px){.nav{position:static}}
.nav button{text-align:left;font:400 .84rem/1.5 system-ui,sans-serif;padding:.6rem .7rem;
  border:1px solid transparent;border-radius:6px;background:none;color:var(--muted);cursor:pointer}
.nav button:hover{background:var(--card)}
.nav button.on{background:var(--card);border-color:var(--line);color:var(--ink);font-weight:600}
.nav .dot{display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:.45rem;background:var(--line)}
.nav .dot.has{background:var(--accent)}

.paper{min-width:0}
.paper h1{font-size:1.22rem;line-height:1.6;margin:.2rem 0 1.4rem;font-weight:700}
.para{background:var(--card);border:1px solid var(--line);border-radius:9px;
  padding:1.1rem 1.2rem .8rem;margin-bottom:1rem}
.para.mark-keep{border-left:3px solid var(--keep)}
.para.mark-edit{border-left:3px solid var(--edit)}
.para.mark-drop{border-left:3px solid var(--drop)}
.para.mark-drop .txt{opacity:.5;text-decoration:line-through}
.txt{margin:0 0 .7rem;text-align:justify}
.tools{display:flex;align-items:center;gap:.45rem;flex-wrap:wrap;
  border-top:1px dashed var(--line);padding-top:.6rem}
.tag{font:500 .76rem/1 system-ui,sans-serif;padding:.38rem .7rem;border:1px solid var(--line);
  border-radius:20px;background:none;color:var(--muted);cursor:pointer}
.tag:hover{border-color:var(--accent)}
.tag.on[data-m=keep]{background:var(--keep);border-color:var(--keep);color:#fff}
.tag.on[data-m=edit]{background:var(--edit);border-color:var(--edit);color:#fff}
.tag.on[data-m=drop]{background:var(--drop);border-color:var(--drop);color:#fff}
.tag.note{margin-left:auto}
textarea{width:100%;margin-top:.6rem;padding:.65rem .75rem;border:1px solid var(--line);
  border-radius:6px;background:var(--bg);color:var(--ink);resize:vertical;
  font:15px/1.75 inherit;min-height:64px}
textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
textarea.hide{display:none}
.overall{background:var(--accent-soft);border:1px solid var(--line);border-radius:9px;
  padding:1.1rem 1.2rem;margin-top:1.6rem}
.overall h2{font:700 .95rem/1.6 system-ui,sans-serif;margin:0 0 .5rem}
.overall textarea{background:var(--card);min-height:96px}
.finstat{display:flex;gap:1.2rem;margin-top:.8rem;font:.84rem/1 system-ui,sans-serif;color:var(--muted)}
.finstat label{display:flex;align-items:center;gap:.35rem;cursor:pointer}
.hint{color:var(--muted);font:.8rem/1.7 system-ui,sans-serif;margin:.2rem 0 1.2rem}

/* 登录页 */
body.center{display:flex;align-items:center;justify-content:center;min-height:100vh}
.login{background:var(--card);border:1px solid var(--line);border-radius:11px;
  padding:2rem 1.9rem;width:min(92vw,330px);text-align:center}
.login h1{font:700 1.06rem/1.6 system-ui,sans-serif;margin:0 0 .1rem}
.login .hint{margin:.1rem 0 1.1rem}
.login input{width:100%;padding:.68rem .8rem;border:1px solid var(--line);border-radius:6px;
  background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,sans-serif;margin-bottom:.9rem}
.login input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}
.login .btn{width:100%}
.err{color:var(--drop);font:.82rem/1.6 system-ui,sans-serif;margin:-.5rem 0 .8rem}

/* 批注集列表 */
.wrap-1{max-width:760px;margin:0 auto;padding:1.8rem 1.4rem 4rem}
.docs{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.6rem}
.docs a{display:block;background:var(--card);border:1px solid var(--line);border-radius:9px;
  padding:1rem 1.15rem;text-decoration:none;color:inherit}
.docs a:hover{border-color:var(--accent)}
.d-title{display:block;font-weight:700;font-size:1rem;line-height:1.6}
.d-meta{display:block;color:var(--muted);font:.79rem/1.7 system-ui,sans-serif;margin-top:.15rem}