:root{color-scheme:light;--bg:#f6f4ef;--panel:#fffcf7;--ink:#1c1915;--muted:#6f675c;--line:#e6dfd2;--accent:#9a3412;--accent-hover:#7c2d12;--soft:#f3ebe0;--user:#1f2933}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:radial-gradient(1200px 500px at 10% -10%,#efe6d4 0,transparent 55%),var(--bg);color:var(--ink);font-family:PingFang SC,Hiragino Sans GB,Noto Sans SC,Source Han Sans SC,sans-serif}button,textarea{font:inherit}.app{min-height:100vh;display:grid;grid-template-columns:260px 1fr;grid-template-rows:auto 1fr auto}.topbar{grid-column:1/-1;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:rgba(255,252,247,.9)}.brand,.topbar{display:flex;align-items:center}.brand{gap:12px}.mark{width:36px;height:36px;flex:none}.mark svg{display:block}.brand h1{margin:0;font-size:18px;font-weight:650}.brand span{display:block;color:var(--muted);font-size:12px;margin-top:2px}.claim{display:inline-flex;align-items:center;height:36px;padding:0 14px;border-radius:999px;background:var(--accent);color:#fff8ef;text-decoration:none;font-size:13px}.claim:hover{background:var(--accent-hover)}.rail{border-right:1px solid var(--line);background:rgba(255,252,247,.72);padding:16px 14px;overflow:auto}.rail h2{margin:0 0 10px;font-size:13px;color:var(--muted);font-weight:500}.new{width:100%;margin-bottom:14px;border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:8px 10px;cursor:pointer}.history{display:flex;flex-direction:column;gap:6px}.history-item{display:flex;align-items:flex-start;gap:2px;border-radius:10px}.history-item.active,.history-item:hover{background:var(--soft)}.history-open{flex:1 1;min-width:0;text-align:left;border:0;background:transparent;border-radius:10px;padding:8px 8px 8px 10px;cursor:pointer;color:var(--ink);line-height:1.4}.history-open small{display:block;color:var(--muted);font-size:12px;margin-top:3px}.history-delete{flex:none;margin:8px 6px 0 0;border:0;background:transparent;color:var(--muted);font-size:12px;line-height:1;padding:4px 2px;cursor:pointer}.history-delete:hover{color:var(--accent)}.history-delete:disabled{opacity:.4;cursor:default}.empty-history{color:var(--muted);font-size:13px;padding:4px 10px}.stage{min-width:0;overflow:auto;padding:28px 32px 20px}.hero{display:grid;grid-template-columns:148px 1fr;grid-gap:24px;gap:24px;align-items:center;margin-bottom:22px}.portrait{width:148px;height:188px;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--soft)}.portrait img{width:100%;height:100%;object-fit:cover;object-position:top}.intro h2{margin:0 0 10px;font-size:30px;line-height:1.25}.intro p{margin:0;color:var(--muted);line-height:1.7}.examples-head{color:var(--muted);font-size:13px;margin-bottom:10px}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-gap:10px;gap:10px}.card{text-align:left;border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:14px 16px;cursor:pointer;display:flex;flex-direction:column;gap:6px;min-height:0}.card:hover{background:var(--soft)}.card .tag{color:var(--accent);font-size:12px}.card strong{font-size:15px;font-weight:600;line-height:1.4}.card em{font-style:normal;color:var(--muted);font-size:13px;line-height:1.55}.thread{display:flex;flex-direction:column;gap:16px}.row{display:flex;gap:10px;align-items:flex-start}.row.user{justify-content:flex-end}.avatar{width:36px;height:36px;border-radius:50%;overflow:hidden;flex:none;background:var(--soft)}.avatar img{width:100%;height:100%;object-fit:cover;object-position:top}.bubble{max-width:min(680px,86%);padding:14px 16px;border-radius:18px;white-space:pre-wrap;line-height:1.75;border:1px solid var(--line);background:var(--panel)}.row.user .bubble{background:var(--user);color:#f8f4ec;border-color:transparent;border-bottom-right-radius:6px}.row.assistant .bubble{border-bottom-left-radius:6px}.status{color:var(--muted);font-size:13px;padding-left:46px}.dock{grid-column:2;padding:0 32px 22px}.toggles{display:flex;gap:8px;margin-bottom:10px}.toggle{border:1px solid var(--line);background:var(--panel);color:var(--muted);border-radius:999px;padding:7px 12px;cursor:pointer}.toggle.on{background:var(--soft);color:var(--accent);border-color:#d6b89a}.composer{display:flex;gap:10px;align-items:flex-end;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:12px 12px 12px 16px}.composer textarea{flex:1 1;border:0;resize:none;min-height:68px;outline:none;background:transparent;line-height:1.6}.send{border:0;background:var(--accent);color:#fff8ef;border-radius:12px;padding:11px 16px;cursor:pointer}.send:disabled{opacity:.5;cursor:wait}.note{margin:8px 0 0;color:var(--muted);font-size:12px}@media (max-width:860px){.app{grid-template-columns:1fr}.rail{display:none}.dock{grid-column:1;padding:0 16px 20px}.stage{padding:20px 16px}.hero{grid-template-columns:96px 1fr}.portrait{width:96px;height:122px}.cards{grid-template-columns:1fr}}