:root{--bg: #f6f2ea;--paper: #fffdf8;--ink: #22252b;--ink-soft: #3c4149;--muted: #7c8188;--accent: #a63d2f;--accent-dark: #7f2c21;--accent-soft: #f5e6df;--teal: #0f766e;--teal-soft: #e2f1ef;--line: #e7ddd0;--shadow: 0 8px 24px rgba(60, 44, 22, .06);--radius: 14px;--fs: clamp(14.5px, .19vw + 11.6px, 17.5px);--fs-sm: clamp(12px, .1vw + 10.6px, 13.5px);--gutter: clamp(14px, 1.9vw, 52px);--gap: clamp(12px, 1.2vw, 30px);--side: clamp(300px, 21vw, 460px)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Segoe UI,sans-serif;color:var(--ink);background:var(--bg);font-size:var(--fs);-webkit-font-smoothing:antialiased}.app{display:flex;flex-direction:column;height:100vh;height:100dvh}.hero{background:linear-gradient(120deg,#b84a34,#a63d2f 55%,#8d3025);color:#fff;padding:clamp(14px,1.3vw,26px) var(--gutter) clamp(12px,1.1vw,22px);box-shadow:0 6px 18px #82281e2e}.hero-inner{max-width:none;display:flex;flex-wrap:wrap;align-items:center;gap:14px clamp(18px,2.4vw,56px)}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:46px;height:46px;border-radius:50%;background:#ffffff29;border:2px solid rgba(255,255,255,.7);display:grid;place-items:center;font-family:Songti SC,STSong,serif;font-size:24px;font-weight:700}.brand-name{font-family:Songti SC,STSong,Georgia,serif;font-size:22px;font-weight:700;letter-spacing:1px;line-height:1.1}.brand-sub{font-size:12px;opacity:.85;letter-spacing:2px}.tagline{flex:1 1 320px;min-width:260px;margin:0;font-size:15px;line-height:1.5}.tagline b{color:#ffe9d6}.hero-chips{display:flex;gap:8px;flex-wrap:wrap}.hchip{font-size:12px;padding:4px 10px;border-radius:999px;background:#ffffff26;border:1px solid rgba(255,255,255,.28)}.layout{flex:1;min-height:0;display:flex;gap:var(--gap);width:100%;padding:clamp(12px,1.3vw,30px) var(--gutter);overflow:hidden}.chat-col{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;min-height:0}.conv{flex:1;min-height:0;overflow-y:auto;padding-right:6px;scroll-behavior:smooth}.chat-turn{margin-bottom:22px}.u-row,.a-row{display:flex;gap:12px;align-items:flex-start}.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;flex:none;font-weight:700;font-size:14px;margin-top:4px}.avatar-u{background:#e8eef4;color:#34495e}.avatar-a{background:var(--accent);color:#fff;font-family:Songti SC,serif}.bubble-user{background:#eef2f7;border-radius:14px 14px 14px 4px;padding:10px 14px;max-width:min(82%,70ch);color:var(--ink-soft);line-height:1.6}.thumb{max-width:180px;max-height:180px;border-radius:8px;display:block;margin-bottom:8px;border:1px solid var(--line)}.card-a{flex:1;min-width:0;background:var(--paper);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px 18px}.card-a-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}.who{font-weight:700;color:var(--accent-dark);font-size:13px}.status{font-size:12px;color:var(--muted);margin-left:auto}.status.streaming{color:var(--accent);animation:pulse 1.3s ease-in-out infinite}.status.done{color:var(--teal)}.status.error{color:#b42318}@keyframes pulse{0%,to{opacity:.4}50%{opacity:1}}.a-error{background:#fdecec;color:#b42318;padding:8px 12px;border-radius:8px;margin-bottom:10px;font-size:13px}.thinking{color:var(--muted);font-size:14px;border-top:1px dashed var(--line);padding-top:10px;margin-top:6px}.answer-body{display:flex;flex-direction:column;gap:12px}.answer-main{min-width:0}.answer-side{min-width:0;display:flex;flex-direction:column;gap:12px}@media(min-width:1180px){.answer-body{display:grid;grid-template-columns:minmax(0,66ch) minmax(0,1fr);gap:clamp(18px,1.8vw,40px);align-items:start}}.md{line-height:1.75;color:var(--ink-soft);font-size:var(--fs)}.md h1,.md h2,.md h3,.md 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SC,serif;font-weight:700;color:var(--ink);margin-bottom:8px}.evidence-group{margin-bottom:10px}.evidence-label{font-size:12px;font-weight:700;color:var(--muted);margin-bottom:6px}.ev-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:10px}.ev-card{background:#fbf8f3;border:1px solid var(--line);border-radius:10px;padding:10px 12px}.ev-card.lit{border-left:3px solid var(--accent)}.ev-card.web{border-left:3px solid var(--teal)}.ev-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.ev-cat{font-size:11px;color:#fff;background:var(--accent);padding:2px 8px;border-radius:5px;font-weight:600}.ev-src{font-size:11px;color:#fff;background:var(--teal);padding:2px 8px;border-radius:5px;font-weight:600}.ev-title{font-size:13.5px;font-weight:700;color:var(--ink)}.ev-url{font-size:13.5px;font-weight:700;color:var(--teal);text-decoration:none}.ev-url:hover{text-decoration:underline}.ev-kw{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 0}.kw{font-size:11px;color:var(--accent-dark);background:var(--accent-soft);padding:2px 8px;border-radius:999px}.ev-snippet{font-size:12.5px;color:var(--muted);line-height:1.6;margin-top:6px}.inputbar{border-top:1px solid var(--line);padding-top:12px;background:linear-gradient(to top,#fffdf8,#fffdf800)}.img-preview{position:relative;display:inline-block;margin-bottom:8px}.img-preview img{max-height:100px;border-radius:8px;border:1px solid var(--line)}.img-remove{position:absolute;top:-8px;right:-8px;width:22px;height:22px;border-radius:50%;border:none;background:var(--accent);color:#fff;cursor:pointer;line-height:1}.inputrow{display:flex;align-items:flex-end;gap:8px}.attach{flex:none;font-size:12px;color:var(--accent);background:var(--accent-soft);border-radius:10px;padding:8px 10px;cursor:pointer;font-weight:700;-webkit-user-select:none;user-select:none}.qbox{flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:10px 14px;font:inherit;color:var(--ink);background:#fff;min-height:46px;outline:none}.qbox:focus{border-color:var(--accent);box-shadow:0 0 0 3px #a63d2f1f}.send{flex:none;border:none;background:var(--accent);color:#fff;font-weight:700;padding:11px 20px;border-radius:12px;cursor:pointer;transition:background .15s}.send:hover{background:var(--accent-dark)}.send:disabled{background:#cdbfb4;cursor:not-allowed}.suggestions{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.chip{border:1px solid var(--line);background:#fff;color:var(--ink-soft);font-size:12px;padding:6px 12px;border-radius:999px;cursor:pointer;transition:all .15s}.chip:hover:not(:disabled){border-color:var(--accent);color:var(--accent-dark)}.chip:disabled{opacity:.5;cursor:not-allowed}.empty{text-align:center;padding:60px 30px;color:var(--ink-soft)}.empty-badge{width:64px;height:64px;border-radius:50%;margin:0 auto 18px;background:var(--accent);color:#fff;display:grid;place-items:center;font-family:Songti SC,serif;font-size:30px;box-shadow:0 10px 24px #82281e33}.empty h2{font-family:Songti SC,serif;margin:0 0 10px;font-weight:700}.empty p{max-width:440px;margin:0 auto;line-height:1.7;color:var(--muted)}.empty-tips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:18px;font-size:13px;color:var(--ink-soft)}.sidebar{flex:0 0 var(--side);width:var(--side);overflow-y:auto;display:flex;flex-direction:column;gap:14px;padding-right:4px}.side-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}.side-card.alert{background:#fbf3f0;border-left:3px solid var(--accent)}.side-card h3{margin:0 0 12px;font-family:Songti SC,serif;font-size:15px;color:var(--ink)}.tool-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.tool-list li{display:flex;flex-direction:column;gap:2px}.tool-k{font-size:12px;font-weight:700;color:var(--accent-dark);font-family:ui-monospace,SF Mono,Menlo,monospace}.tool-v{font-size:12px;color:var(--ink-soft);line-height:1.5}.cat-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.cat-chip{font-size:12px;background:var(--teal-soft);color:var(--teal);padding:5px 10px;border-radius:8px;font-weight:600}.steps{margin:0;padding-left:1.2em;color:var(--ink-soft);font-size:13px;line-height:1.6}.steps li+li{margin-top:6px}.muted{color:var(--muted);font-size:13px;line-height:1.6}.foot{text-align:center;font-size:12px;color:var(--muted);padding:10px 24px;border-top:1px solid var(--line);background:var(--bg)}@media(min-width:1600px){.ev-cards{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}.side-card{padding:18px}.trace-reason p{max-width:96ch}}@media(max-width:900px){.layout{flex-direction:column;overflow:visible;padding:12px var(--gutter) 0}.chat-col{min-height:auto}.conv{overflow:visible;min-height:auto;padding-right:0}.sidebar{order:2;width:100%;flex:none;overflow:visible}.app{height:auto;min-height:100vh}.inputbar{position:sticky;bottom:0;z-index:6;padding-bottom:10px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.qbox{font-size:16px}.send,.attach{min-height:46px;display:inline-flex;align-items:center}.chip{padding:9px 14px}.foot{padding:12px var(--gutter) 18px}}@media(max-width:560px){.hero-inner{gap:10px 14px}.tagline{min-width:0;flex-basis:100%;font-size:14px}.brand-mark{width:40px;height:40px;font-size:21px}.brand-name{font-size:19px}.card-a{padding:12px 13px}.avatar{width:30px;height:30px}.bubble-user{max-width:90%}}