:root{--bg: #f5f6f8;--panel: #fff;--border: #e5e7eb;--text: #181b22;--muted: #9aa1ad;--primary: #4f46e5;--memory: #f59e0b}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:13px;overflow:hidden}button{font-family:inherit;cursor:pointer;border:none;background:none}.muted{color:var(--muted)}.small{font-size:11px}.login{max-width:320px;margin:15vh auto;display:flex;flex-direction:column;gap:10px;padding:24px}.login h1{text-align:center}.login input,.login button{padding:9px 12px;border-radius:8px;border:1px solid var(--border);font-size:13px}.login button{background:var(--primary);color:#fff}.app{display:grid;height:100vh;grid-template-columns:268px minmax(420px,1fr) 452px;grid-template-rows:54px 1fr}.topbar{grid-column:1/-1;display:flex;align-items:center;gap:14px;padding:0 18px;background:var(--panel);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:8px;font-weight:650}.logo{width:26px;height:26px;border-radius:8px;background:var(--primary);color:#fff;display:grid;place-items:center;font-size:12px}.topbar .user{margin-left:auto;color:var(--muted);font-size:12px}.sidebar{background:var(--panel);border-right:1px solid var(--border);overflow-y:auto}.tree{padding:12px}.tree-head{display:flex;align-items:center;justify-content:space-between;font-size:11.5px;font-weight:650;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px}.icon{width:24px;height:24px;border-radius:6px;color:var(--muted)}.icon:hover{background:var(--bg)}.tree-section{margin-bottom:16px}.section-title{font-size:11px;font-weight:650;color:var(--muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}.row{display:flex;gap:6px}.path-input{flex:1;padding:6px 9px;border:1px solid var(--border);border-radius:7px;font-size:12px}.btn-memory{padding:6px 10px;background:var(--memory);color:#fff;border-radius:7px;font-size:12px;font-weight:560;white-space:nowrap}.mem-row{display:flex;align-items:center;gap:7px;padding:6px 8px;border-radius:7px;cursor:pointer}.mem-row:hover{background:#fafbfc}.mem-row.active{background:#eef1ff}.badge{color:var(--memory)}.path{flex:1;font-size:12px}.count{font-size:10.5px;color:var(--muted)}.chat{display:flex;flex-direction:column;overflow:hidden}.chat-inner{display:flex;flex-direction:column;flex:1;overflow:hidden}.ctx-bar{padding:9px 20px;background:var(--panel);border-bottom:1px solid var(--border);flex-shrink:0}.ctx-chip{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:7px;background:#fff8ec;border:1px solid #fde68a;font-size:12px;color:#92400e;font-weight:560}.messages{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:14px}.msg{display:flex;gap:10px}.msg.user{flex-direction:row-reverse}.avatar{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;font-size:11px;font-weight:650;background:var(--primary);color:#fff;flex-shrink:0}.msg.user .avatar{background:#a5b4fc}.body{min-width:0;max-width:calc(100% - 40px)}.bubble{padding:8px 12px;border-radius:10px;line-height:1.6;background:var(--panel);border:1px solid var(--border);white-space:pre-wrap}.msg.user .bubble{background:var(--primary);color:#fff;border:none}.tool{display:flex;align-items:center;gap:8px;margin-top:6px;padding:6px 10px;background:var(--panel);border:1px solid var(--border);border-radius:8px;font-size:11.5px;border-left:2.5px solid var(--primary)}.tool-name{font-family:ui-monospace,monospace;font-weight:600}.tool-status{margin-left:auto;color:var(--muted);font-size:11px}.asset{margin-top:8px;display:flex;align-items:center;gap:10px;padding:10px 12px;background:#ecfdf5;border:1px solid #d1fae5;border-radius:9px;font-size:12px}.asset a{margin-left:auto;color:var(--primary);font-weight:560}.composer{padding:12px 24px 18px;display:flex;gap:8px;align-items:flex-end}.composer textarea{flex:1;resize:none;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-family:inherit;font-size:13px;outline:none}.composer textarea:focus{border-color:#c7ccf7;box-shadow:0 0 0 3px #6366f11a}.composer button{padding:10px 18px;background:var(--primary);color:#fff;border-radius:10px;font-weight:560}.composer button:disabled{background:#d5d8e6;cursor:default}.rail{background:var(--panel);border-left:1px solid var(--border);overflow-y:auto}.preview-empty{padding:60px 28px;color:var(--muted);text-align:center;line-height:1.7}.preview{padding:14px}.asset-info{display:flex;align-items:center;gap:10px;padding:10px 12px;background:#ecfdf5;border:1px solid #d1fae5;border-radius:9px;margin-bottom:12px}.sheet{width:100%;border-collapse:collapse;font-size:11.5px}.sheet th,.sheet td{padding:6px 8px;border-bottom:1px solid #eef0f3;text-align:left;white-space:nowrap}.sheet th{background:#fafbfc;font-weight:600;color:#5c6470}.preview-foot{display:flex;justify-content:space-between;align-items:center;padding-top:12px}.btn-primary{padding:6px 12px;background:var(--primary);color:#fff;border-radius:8px;font-size:12px;font-weight:560;text-decoration:none}.bottom-tabs{display:none}@media (max-width: 1199px){.app{grid-template-columns:1fr 380px}}@media (max-width: 767px){.app{grid-template-columns:1fr;grid-template-rows:54px 1fr 56px}.sidebar,.rail{display:none}.app.mobile-tab-tree .sidebar,.app.mobile-tab-preview .rail{display:block;grid-row:2;grid-column:1}.app.mobile-tab-tree .chat,.app.mobile-tab-preview .chat{display:none}.bottom-tabs{display:flex;grid-row:3;grid-column:1;background:var(--panel);border-top:1px solid var(--border)}.bottom-tabs button{flex:1;font-size:12px;color:var(--muted)}.bottom-tabs button.on{color:var(--primary);font-weight:600}}.sidebar{overflow-y:auto;overflow-x:hidden}.file-list{display:flex;flex-direction:column;gap:4px}.file-row{display:flex;align-items:center;padding:4px 8px;font-size:12px;color:#444;border-radius:4px}.file-row:hover{background:#f5f5f5}.file-name{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-status{font-size:10px}.tool{display:flex;align-items:center;gap:8px;margin-top:6px;padding:6px 10px;background:#fafbfc;border:1px solid #e5e7eb;border-radius:8px;font-size:12px;border-left:3px solid #8b5cf6;animation:fadeUp .3s ease}.tool.ok{border-left-color:#10b981}.tool-name{font-family:ui-monospace,monospace;font-weight:600;color:#333}.tool-status{margin-left:auto;color:#9aa1ad;font-size:11px}.tool-status.ok{color:#10b981}.topbar-right{margin-left:auto;display:flex;align-items:center;gap:16px}.credit{font-size:12px;color:#5c6470;background:#f5f6f8;padding:4px 10px;border-radius:6px;border:1px solid #e5e7eb}.user-info{display:flex;align-items:center;gap:12px}.user-email{font-size:12.5px;color:#181b22;font-weight:500}.top-btn{font-size:12.5px;color:#5c6470;padding:4px 8px;border-radius:6px;transition:.15s}.top-btn:hover{background:#f5f6f8;color:#181b22}.text-danger{color:#ef4444}.text-danger:hover{background:#fef2f2;color:#b91c1c}.dropdown-menu{position:absolute;right:0;top:100%;margin-top:4px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;box-shadow:0 4px 12px #0000001a;z-index:100;min-width:120px;padding:4px 0}.dropdown-item{padding:8px 12px;font-size:12.5px;cursor:pointer;color:#333;display:flex;gap:8px;align-items:center}.dropdown-item:hover{background:#f5f6f8}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:1000;display:flex;align-items:center;justify-content:center}.modal-box{background:#fff;border-radius:12px;padding:24px;width:340px;box-shadow:0 10px 25px #0003}.modal-box h3{margin-bottom:12px;font-size:16px}.modal-actions{display:flex;justify-content:flex-end;margin-top:20px}