:root{--bg: #f4f5f7;--panel: #ffffff;--line: #e4e6eb;--text: #1f2329;--muted: #6b7280;--accent: #2563eb;--accent-soft: #eaf0fd;--danger: #dc2626;--ok: #15803d;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text)}*{box-sizing:border-box}body{margin:0;background:var(--bg);font-size:14px}button{font:inherit;cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 14px;color:var(--text)}button:hover{border-color:#c9ccd3}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover{background:#1d4ed8}button.ghost{border:none;background:transparent;color:var(--muted);padding:6px 8px}button.ghost:hover{color:var(--accent)}input,textarea,select{font:inherit;padding:9px 12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text);outline:none;width:100%}input:focus,textarea:focus,select:focus{border-color:var(--accent)}.app{height:100vh;display:flex;flex-direction:column}.topbar{height:56px;flex:0 0 56px;display:flex;align-items:center;gap:20px;padding:0 20px;background:var(--panel);border-bottom:1px solid var(--line)}.brand{font-weight:700;letter-spacing:.3px}.brand span{color:var(--accent)}.nav{display:flex;gap:4px}.nav button{border:none;background:transparent;color:var(--muted);padding:8px 14px;border-radius:8px}.nav button.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.topbar .me{margin-left:auto;display:flex;align-items:center;gap:10px;color:var(--muted)}.login-wrap{height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,#f7f8fa,#eef1f6)}.login-card{width:380px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px;box-shadow:0 12px 40px #10182814}.login-card h1{font-size:22px;margin:0 0 6px}.login-card p{color:var(--muted);margin:0 0 24px;font-size:13px}.login-card .field{margin-bottom:14px}.login-card label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}.login-hint{margin-top:14px;font-size:12px;color:var(--muted);text-align:center}.error{color:var(--danger);font-size:12px;margin-top:10px}.inbox{flex:1;display:grid;grid-template-columns:clamp(240px,24%,320px) minmax(360px,1fr) clamp(240px,22%,300px);min-height:0;min-width:0}.list-pane{background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}.filters{padding:12px 14px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:10px}.chips{display:flex;gap:6px;flex-wrap:wrap}.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px;font-size:12px;color:var(--muted)}.chip.active{background:var(--accent-soft);border-color:#cddcfa;color:var(--accent)}.conv-list{flex:1;overflow-y:auto}.conv-item{padding:12px 14px;border-bottom:1px solid #f1f2f4;cursor:pointer;display:flex;gap:10px}.conv-item:hover{background:#fafbfc}.conv-item.active{background:var(--accent-soft)}.avatar{width:38px;height:38px;flex:0 0 38px;border-radius:10px;background:#e8ecf3;color:#46536b;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}.conv-main{flex:1;min-width:0}.conv-top{display:flex;justify-content:space-between;gap:8px}.conv-name{font-weight:600;font-size:13px}.conv-time{font-size:11px;color:var(--muted);white-space:nowrap}.conv-preview{font-size:12px;color:var(--muted);margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.badge{background:var(--accent);color:#fff;border-radius:999px;font-size:11px;padding:1px 6px;margin-left:6px}.tag{font-size:11px;border:1px solid var(--line);border-radius:4px;padding:1px 5px;color:var(--muted)}.thread-pane{display:flex;flex-direction:column;min-height:0;background:#fbfbfc}.thread-head{padding:14px 20px;background:var(--panel);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;flex-wrap:wrap}.thread-head h2{font-size:15px;margin:0}.thread-head button{white-space:nowrap;flex:0 0 auto}.thread-body{flex:1;overflow-y:auto;padding:20px;display:flex;flex-direction:column;gap:14px}.msg{display:flex;flex-direction:column;max-width:66%}.msg.out{align-self:flex-end;align-items:flex-end}.msg .bubble{padding:9px 13px;border-radius:12px;background:#fff;border:1px solid var(--line);line-height:1.6;white-space:pre-wrap;word-break:break-word}.msg.out .bubble{background:var(--accent);border-color:var(--accent);color:#fff}.msg.ai .bubble{background:#f0f7f2;border-color:#d6ead9;color:#1f2329}.msg.ai .bubble .badge{display:none}.msg .meta{font-size:11px;color:var(--muted);margin-top:4px}.composer{border-top:1px solid var(--line);background:var(--panel);padding:12px 16px;display:flex;gap:10px}.composer textarea{height:46px;resize:none}.side-pane{background:var(--panel);border-left:1px solid var(--line);padding:18px;overflow-y:auto}.side-pane h3{font-size:13px;margin:0 0 12px;color:var(--muted);font-weight:600;letter-spacing:.4px}.kv{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px dashed #eceef2;font-size:12px}.kv span:first-child{color:var(--muted)}.side-actions{display:flex;flex-direction:column;gap:8px;margin-top:18px}.admin{flex:1;overflow-y:auto;padding:24px}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:18px}.card h2{font-size:15px;margin:0 0 4px}.card .sub{color:var(--muted);font-size:12px;margin-bottom:16px}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}.stat{border:1px solid var(--line);border-radius:10px;padding:16px}.stat .num{font-size:26px;font-weight:700;margin-top:6px}.stat .label{color:var(--muted);font-size:12px}table{width:100%;border-collapse:collapse;font-size:13px}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid #f1f2f4}th{color:var(--muted);font-weight:600;font-size:12px}.row{display:flex;gap:12px}.row>*{flex:1}.muted{color:var(--muted);font-size:12px}.doc-item{padding:12px 0;border-bottom:1px solid #f1f2f4}.doc-item strong{font-size:13px}@media (max-width: 1080px){.inbox{grid-template-columns:260px minmax(320px,1fr)}.side-pane{display:none}}@media (max-width: 720px){.inbox{grid-template-columns:1fr}.list-pane{display:none}}