:root{--bg: #faf7f4;--panel: #ffffff;--line: #eee5dd;--brand: #d97b66;--brand-dark: #c05f4b;--text: #3d3229;--muted: #9a8c80;--radius: 14px;font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text)}.app{display:flex;height:100vh}.login-wrap{display:flex;align-items:center;justify-content:center;height:100%}.login-card{width:380px;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:40px 36px;text-align:center;box-shadow:0 12px 40px #a0785a1f}.login-card h1{margin:0 0 4px}.login-card .sub{color:var(--muted);margin:0 0 28px}.field{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;background:#fffdfb;outline:none;margin-bottom:12px}.field:focus{border-color:var(--brand)}.field.short{width:120px}.code-row{display:flex;gap:8px}.code-row .field{flex:1}.btn-primary{background:var(--brand);color:#fff;border:none;border-radius:10px;padding:12px 18px;font-size:15px;cursor:pointer}.btn-primary:hover{background:var(--brand-dark)}.btn-primary:disabled{background:#e5c9c0;cursor:not-allowed}.btn-primary.big{width:100%;margin-top:8px}.btn-ghost{background:#fff;border:1px solid var(--brand);color:var(--brand);border-radius:10px;padding:0 14px;cursor:pointer;white-space:nowrap}.btn-ghost:disabled{border-color:var(--line);color:var(--muted);cursor:not-allowed}.dev-hint{color:#b07f2c;font-size:13px}.error-text{color:#c0452f;font-size:13px}.ok-text{color:#4c9a5f;font-size:13px}.hint{color:var(--muted);font-size:12px}.sidebar{width:260px;background:#f4ece5;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:16px 12px}.brand{font-size:20px;font-weight:700;padding:4px 8px 14px}.conv-list{flex:1;overflow-y:auto;margin-top:12px}.conv-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-radius:10px;cursor:pointer;font-size:14px}.conv-item:hover{background:#ece0d6}.conv-item.active{background:#fff;box-shadow:0 1px 4px #0000000f}.conv-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-del{border:none;background:none;color:var(--muted);font-size:16px;cursor:pointer}.conv-del:hover{color:#c0452f}.empty{color:var(--muted);font-size:13px;padding:12px}.sidebar-footer{display:flex;flex-direction:column;gap:6px;padding:8px}.link{background:none;border:none;color:var(--text);text-align:left;cursor:pointer;font-size:14px;padding:4px 0}.link.muted{color:var(--muted)}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0}.chat-header{padding:14px 24px;border-bottom:1px solid var(--line);font-weight:600;background:var(--panel)}.messages{flex:1;overflow-y:auto;padding:24px;display:flex;flex-direction:column;gap:16px}.welcome{margin:auto;text-align:center;color:var(--muted);max-width:420px}.welcome h2{color:var(--text)}.row{display:flex}.row.user{justify-content:flex-end}.bubble{max-width:72%;padding:12px 16px;border-radius:var(--radius);font-size:15px;line-height:1.7;white-space:pre-wrap;word-break:break-word}.user-bubble{background:var(--brand);color:#fff;border-bottom-right-radius:4px}.assistant-bubble{background:var(--panel);border:1px solid var(--line);border-bottom-left-radius:4px}.cursor{animation:blink 1s infinite}@keyframes blink{50%{opacity:0}}.failed{color:#c0452f;font-size:13px;margin-top:6px}.resource-cards{display:flex;flex-direction:column;gap:8px;margin-top:12px}.resource-card{display:flex;align-items:center;gap:10px;padding:10px 12px;background:#fdf6f3;border:1px solid #f0dcd2;border-radius:10px;text-decoration:none;color:var(--text);font-size:14px}.resource-card:hover{border-color:var(--brand)}.resource-icon{font-size:18px}.resource-title{display:block;font-weight:600}.resource-type{display:block;font-size:12px;color:var(--muted)}.error-bar{margin:0 24px 8px;padding:8px 14px;background:#fdeeea;color:#c0452f;border-radius:8px;font-size:13px}.composer{display:flex;gap:10px;padding:14px 24px 20px;background:var(--panel);border-top:1px solid var(--line)}.composer textarea{flex:1;resize:none;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:15px;font-family:inherit;outline:none}.composer textarea:focus{border-color:var(--brand)}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#3c281e66;display:flex;align-items:center;justify-content:center;z-index:10}.modal{background:var(--panel);border-radius:18px;padding:24px 28px;width:420px;max-height:86vh;overflow-y:auto}.modal-head{display:flex;justify-content:space-between;align-items:center}.modal-head h2{margin:0}.form-row{margin-top:18px}.form-row>label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}.radio-row{display:flex;gap:24px;font-size:14px}.modal-foot{margin-top:24px;display:flex;justify-content:flex-end;align-items:center;gap:12px}