:root{--ink:#25332e;--muted:#7a847e;--line:#dfe4de;--green:#34644d;--green-dark:#274e3c;--pale:#eaf1e9;--paper:#fafbf7;--ground:#f3f5ef;--gold:#b68c43;--danger:#8c3a31}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--ground);font:14px/1.65 Segoe UI,Microsoft YaHei,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer;color:inherit;background:white;border:1px solid var(--line);border-radius:7px;padding:9px 14px}button:hover{border-color:var(--green);background:#f0f4ee}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #9bbcab;outline-offset:2px}button:disabled{opacity:.55;cursor:default}.primary{background:var(--green);color:white;border-color:var(--green)}.primary:hover{background:var(--green-dark);color:white}.ghost{background:transparent;border-color:transparent}.selected{background:#dce8dc;border-color:#dce8dc;color:#2c5a42}.muted{color:var(--muted)}.eyebrow{font-size:11px;letter-spacing:2px;text-transform:uppercase;color:var(--green);font-weight:700}.brand{font-family:Georgia,serif;font-size:22px;font-weight:700;letter-spacing:-1px;white-space:nowrap}.brand i{display:inline-grid;place-items:center;width:27px;height:27px;background:var(--green);color:white;font-size:18px;margin-right:9px;border-radius:7px;font-style:normal}.app-header{height:62px;padding:0 26px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:var(--paper)}h1,h2,h3,p{margin-top:0}h1{font-size:28px;letter-spacing:-1px;line-height:1.4}h2{font-size:18px}.tag{font-size:11px;padding:3px 8px;border-radius:4px;background:var(--pale);color:var(--green)}.rule{height:1px;background:var(--line);margin:22px 0}.row{display:flex;align-items:center;gap:12px}.between{justify-content:space-between}.content{padding:38px 44px 80px;max-width:1200px;width:100%;margin:auto}.cards{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:18px;gap:18px}.card{padding:22px;background:var(--paper);border:1px solid var(--line);border-radius:10px}.project-line{padding:18px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.form{max-width:560px;margin:auto;background:white;padding:34px;border:1px solid var(--line);border-radius:12px}.field{margin:18px 0}.field label{display:block;margin-bottom:8px;font-weight:600}input,textarea{border:1px solid var(--line);border-radius:7px;background:white;padding:12px;color:var(--ink);width:100%}textarea{resize:vertical}.error-box,.success-box{margin:14px 0;padding:12px 15px;border-radius:8px;font-size:13px}.error-box{background:#f7e9e5;border-left:3px solid var(--danger);color:var(--danger)}.success-box{background:#eaf4e6;border-left:3px solid #6f9a68;color:#3d5c37}.shell{display:grid;grid-template-columns:218px 1fr;min-height:calc(100vh - 62px)}.rail{padding:24px 16px;border-right:1px solid var(--line);background:#edf0e8}.rail button{width:100%;text-align:left;margin:4px 0}.callout{border-left:3px solid var(--gold);background:#f5f0e3;padding:14px 18px;margin:20px 0}.task-head{padding:16px 26px;background:var(--paper);border-bottom:1px solid var(--line);display:flex;align-items:center}.editor-grid{display:grid;grid-template-columns:215px minmax(360px,1fr) 300px;min-height:calc(100vh - 115px)}.outline{padding:20px 14px;border-right:1px solid var(--line);background:#edf0e8}.assistant{padding:20px 16px;background:#f8faf5;border-left:1px solid var(--line)}.sheet-zone{padding:26px;background:#eef0e9}.sheet{max-width:780px;margin:auto;background:white;padding:34px 40px;border:1px solid #e5e7df;border-radius:8px;min-height:480px}.save-badge{font-size:12px;padding:4px 10px;border-radius:12px;background:var(--pale);color:var(--green)}.version-overlay{position:fixed;inset:0;background:#10281a55;z-index:50;display:grid;place-items:center;padding:20px}.version-panel{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:24px;width:560px;max-width:94vw;max-height:84vh;overflow:auto}.version-list{display:flex;flex-direction:column;gap:10px}.version-item{border:1px solid var(--line);border-radius:8px;padding:12px 14px;background:white}.version-item summary{cursor:pointer}.version-preview{margin:10px 0;padding:10px 12px;background:var(--paper);border:1px solid var(--line);border-radius:6px;font-size:12px;line-height:1.8;white-space:pre-wrap;max-height:180px;overflow:auto;font-family:inherit}.save-saving{background:#f5f0e3;color:#8a6b2e}.save-error{background:#f7e9e5;color:var(--danger)}.chat-panel{display:flex;flex-direction:column;min-height:300px}.chat-history{flex:1 1;overflow-y:auto;max-height:480px;padding-right:4px}.bubble{padding:12px 14px;border:1px solid var(--line);border-radius:8px;margin:10px 0;background:white}.bubble-user{border-left:3px solid var(--green);background:#f6faf4}.bubble-assistant{border-left:3px solid #b5c9b0;background:#fbfcfa}.diff-view{border:1px solid var(--line);border-radius:8px;padding:10px 12px;background:var(--paper)}.diff-added,.diff-removed{padding:8px 10px;border-radius:6px;margin:6px 0;font-size:13px;line-height:1.8}.diff-added{background:#eaf4e6;border-left:3px solid #6f9a68}.diff-removed{background:#f7e9e5;border-left:3px solid var(--danger)}.diff-added p,.diff-removed p{margin:0;white-space:pre-wrap}.diff-label{font-size:10px;letter-spacing:1px;color:var(--muted);display:block;margin-bottom:3px}.stale-tag{background:#f5f0e3;color:#8a6b2e}.material-row{display:flex;gap:14px;align-items:flex-start;padding:16px 4px;border-bottom:1px solid var(--line)}.parse-badge{font-size:11px;padding:3px 8px;border-radius:4px}.parse-ok{background:#eaf4e6;color:#3d5c37}.parse-warn{background:#f5f0e3;color:#8a6b2e}.parse-error{background:#f7e9e5;color:var(--danger)}@media (max-width:1100px){.editor-grid{grid-template-columns:175px 1fr}.assistant{grid-column:1/-1;border-top:1px solid var(--line)}}@media (max-width:720px){.material-row{flex-direction:column}.editor-grid{display:block}.outline{display:flex;overflow-x:auto;padding:8px;border-right:0;border-bottom:1px solid var(--line)}.outline button{min-width:140px;white-space:nowrap}.outline .rule,.outline p{display:none}.sheet-zone{padding:12px}.sheet{padding:22px}.task-head{padding:12px 14px}.task-head .row{flex-wrap:wrap}}@media (max-width:1000px){.cards{grid-template-columns:1fr}.shell{display:block}.rail{display:none}.content{padding:26px 20px 60px}}