:root{--sans:Inter, "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;--mono:"Cascadia Mono", "SFMono-Regular", Consolas, monospace;--bg:#f5f7f6;--surface:#fff;--subtle:#f0f4f2;--field:#fbfcfb;--text:#48534f;--text-strong:#15211d;--muted:#66736e;--border:#d9e0dc;--border-strong:#b8c5bf;--accent:#207263;--accent-contrast:#fff;--danger-bg:#fff1f0;--danger-border:#f0b7b3;--danger-text:#9f2f26;--shadow:0 18px 55px #222c2714;font-family:var(--sans);font-synthesis:none;color:var(--text);background:var(--bg);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}body{margin:0}button,textarea,input{font:inherit}::selection{color:var(--accent-contrast);background:var(--accent)}.app-shell{background:linear-gradient(180deg, #1c25410a, transparent 360px), var(--bg);min-height:100vh;color:var(--text)}.workspace{grid-template-columns:minmax(0,1fr) minmax(360px,.86fr);gap:20px;width:min(1320px,100% - 32px);margin:0 auto;padding:32px 0;display:grid}.input-panel,.result-panel{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:8px}.input-panel{padding:24px}.result-panel{min-height:720px;padding:24px}.panel-heading{margin-bottom:22px}.eyebrow{color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin:0 0 8px;font-size:13px;font-weight:700}h1,h2,h3{color:var(--text-strong);margin:0;line-height:1.15}h1{max-width:780px;font-size:clamp(32px,5vw,56px);font-weight:760}h2{font-size:24px;font-weight:720}h3{font-size:16px;font-weight:720}.intro{max-width:760px;color:var(--muted);margin:14px 0 0}.field-label{color:var(--text-strong);margin-bottom:8px;font-size:15px;font-weight:700;display:block}textarea{resize:vertical;box-sizing:border-box;border:1px solid var(--border);width:100%;min-height:410px;color:var(--text-strong);background:var(--field);font:15px/1.65 var(--mono);border-radius:8px;outline:none;padding:16px}textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #20726324}.input-meta{min-height:22px;color:var(--muted);justify-content:space-between;gap:12px;margin-top:8px;font-size:13px;display:flex}.upload-row{border:1px dashed var(--border-strong);background:var(--subtle);border-radius:8px;align-items:center;gap:14px;margin-top:18px;padding:14px;display:flex}.upload-button input{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.upload-button,button{font:700 15px/1 var(--sans);cursor:pointer;border:1px solid #0000;border-radius:8px;transition:border-color .2s,background .2s,transform .2s}.upload-button{color:var(--accent-contrast);background:var(--accent);flex:none;padding:11px 14px}.upload-button:hover,button:hover:not(:disabled){transform:translateY(-1px)}.upload-copy{gap:4px;min-width:0;display:grid}.upload-copy strong,.upload-copy span{overflow-wrap:anywhere}.upload-copy strong{color:var(--text-strong);font-size:14px}.upload-copy span{color:var(--muted);font-size:13px}.error-box{border:1px solid var(--danger-border);color:var(--danger-text);background:var(--danger-bg);border-radius:8px;margin:16px 0 0;padding:12px 14px}.actions{gap:10px;margin-top:18px;display:flex}button{min-height:44px;padding:0 16px}button:disabled{cursor:not-allowed;opacity:.55}.primary-button{color:var(--accent-contrast);background:var(--accent)}.secondary-button{color:var(--text-strong);border-color:var(--border);background:var(--surface)}.cost-note{color:var(--muted);margin:16px 0 0;font-size:13px}.result-header{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:22px;display:flex}.model-badge{border:1px solid var(--border);color:var(--text-strong);background:var(--field);font:12px/1 var(--mono);border-radius:999px;flex:none;padding:7px 10px}.empty-state,.loading-state{min-height:560px;color:var(--muted);text-align:center;align-content:center;place-items:center;gap:14px;display:grid}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:34px;height:34px;animation:.8s linear infinite spin}.result-content{gap:14px;display:grid}.result-section{border-top:1px solid var(--border);padding-top:14px}.result-section p{color:var(--text);margin:8px 0 0;line-height:1.75}.result-section ul{color:var(--text);margin:10px 0 0;padding-left:22px}.result-section li{margin:7px 0;line-height:1.65}@keyframes spin{to{transform:rotate(360deg)}}@media (width<=980px){.workspace{grid-template-columns:1fr}.result-panel{min-height:420px}.empty-state,.loading-state{min-height:260px}}@media (width<=640px){.workspace{width:min(100% - 20px,1320px);padding:10px 0}.input-panel,.result-panel{padding:16px}.upload-row,.actions,.input-meta,.result-header{flex-direction:column;align-items:stretch}}