:root{--bg:#f5f2ea;--panel:#fffdf7;--ink:#1f2520;--muted:#6d746f;--line:#d9d3c4;--green:#18634b;--green-strong:#0e4f3a;--coral:#d9604a;--blue:#315f8d;--shadow:0 18px 50px rgba(38,35,28,0.13)}*{box-sizing:border-box}body,html{min-height:100%}body{background:linear-gradient(135deg,rgba(24,99,75,.1),transparent 36%),linear-gradient(315deg,rgba(217,96,74,.09),transparent 34%),var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;margin:0}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.55}.app-shell{display:grid;grid-gap:18px;gap:18px;grid-template-columns:minmax(320px,420px) minmax(0,1fr);min-height:100vh;padding:18px}.control-panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);display:flex;flex-direction:column;min-height:calc(100vh - 36px);padding:22px}.brand-row{align-items:center;display:flex;gap:12px;margin-bottom:22px}.brand-mark{align-items:center;background:var(--green);border-radius:8px;color:#fffdf7;display:grid;height:44px;justify-content:center;width:44px}h1{font-size:24px;line-height:1.1;margin:0 0 4px}.brand-row p{color:var(--muted);font-size:13px;margin:0}.tool-form{display:flex;flex:1 1;flex-direction:column;gap:18px}.mode-tabs{background:#ece5d8;border:1px solid var(--line);border-radius:8px;display:grid;grid-gap:4px;gap:4px;grid-template-columns:repeat(3,minmax(0,1fr));padding:4px}.icon-button,.mode-tab,.segment,.submit-button{align-items:center;border:0;border-radius:6px;display:inline-flex;gap:7px;justify-content:center;min-height:40px;transition:background .16s ease,color .16s ease,transform .16s ease}.mode-tab{background:transparent;color:var(--muted);font-size:14px;padding:0 8px}.mode-tab.active{background:var(--panel);color:var(--green-strong);box-shadow:0 6px 18px rgba(31,37,32,.08)}.upload-zone{align-items:center;aspect-ratio:16/10;background:linear-gradient(135deg,rgba(24,99,75,.06),transparent 42%),#f7f0e2;border:2px dashed #b6a787;border-radius:8px;color:var(--green-strong);display:grid;justify-items:center;overflow:hidden;position:relative;transition:background .16s ease,border-color .16s ease,transform .16s ease}.upload-zone.filled{background:linear-gradient(45deg,rgba(31,37,32,.06) 25%,transparent 0),linear-gradient(-45deg,rgba(31,37,32,.06) 25%,transparent 0),linear-gradient(45deg,transparent 75%,rgba(31,37,32,.06) 0),linear-gradient(-45deg,transparent 75%,rgba(31,37,32,.06) 0),#fffdf7;background-position:0 0,0 12px,12px -12px,-12px 0;background-size:24px 24px;border-style:solid;border-color:var(--green)}.upload-zone:hover{background:linear-gradient(135deg,rgba(24,99,75,.1),transparent 46%),#fff7e8;border-color:var(--green);transform:translateY(-1px)}.upload-zone input{inset:0;opacity:0;position:absolute;z-index:3}.upload-zone img{height:100%;object-fit:contain;padding:10px;width:100%}.upload-zone.filled:before{background:var(--green);border-radius:0 0 6px 0;color:#ffffff;content:"已上传";font-size:12px;font-weight:750;left:0;padding:6px 9px;position:absolute;top:0;z-index:2}.upload-empty{align-items:center;display:grid;grid-gap:9px;gap:9px;justify-items:center;padding:18px;pointer-events:none;text-align:center;z-index:1}.upload-icon{align-items:center;background:var(--green);border-radius:8px;color:#ffffff;display:inline-flex;height:54px;justify-content:center;width:54px}.upload-title{color:var(--green-strong);font-size:17px;font-weight:750}.upload-hint{color:var(--muted);font-size:13px;line-height:1.45}.upload-file-name{background:rgba(31,37,32,.72);border-radius:6px;bottom:10px;color:#ffffff;font-size:12px;left:10px;max-width:calc(100% - 20px);overflow:hidden;padding:6px 8px;pointer-events:none;position:absolute;text-overflow:ellipsis;white-space:nowrap;z-index:2}.field-group{display:grid;grid-gap:8px;gap:8px}.field-group label{color:var(--ink);font-size:14px;font-weight:650}select,textarea{background:#fffaf0;border:1px solid var(--line);border-radius:8px;color:var(--ink);outline:none;width:100%}select{min-height:42px;padding:0 12px}textarea{line-height:1.55;min-height:156px;padding:12px;resize:vertical}select:focus,textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(24,99,75,.13)}.segmented-grid{display:grid;grid-gap:8px;gap:8px;grid-template-columns:repeat(5,minmax(0,1fr))}.segmented-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.segment{background:#efe8da;color:#444a45;min-width:0;padding:0 8px}.segment.active{background:var(--blue);color:#ffffff}.submit-button{background:var(--green);color:#ffffff;font-weight:750;margin-top:auto;min-height:48px;width:100%}.submit-button:hover:not(:disabled){background:var(--green-strong);transform:translateY(-1px)}.workspace{display:grid;grid-gap:12px;gap:12px;grid-template-rows:auto minmax(0,1fr);min-width:0}.preview-toolbar{align-items:center;background:rgba(255,253,247,.82);border:1px solid var(--line);border-radius:8px;display:flex;justify-content:space-between;min-height:58px;padding:10px 12px}.preview-toolbar>div{align-items:center;color:var(--muted);display:inline-flex;gap:8px;font-size:14px}.status-dot{background:var(--coral);border-radius:999px;display:inline-block;height:9px;width:9px}.icon-button{background:var(--ink);color:#ffffff;min-width:92px;padding:0 14px}.preview-stage{align-items:center;background:linear-gradient(45deg,rgba(31,37,32,.04) 25%,transparent 0),linear-gradient(-45deg,rgba(31,37,32,.04) 25%,transparent 0),linear-gradient(45deg,transparent 75%,rgba(31,37,32,.04) 0),linear-gradient(-45deg,transparent 75%,rgba(31,37,32,.04) 0),#fffdf7;background-position:0 0,0 12px,12px -12px,-12px 0;background-size:24px 24px;border:1px solid var(--line);border-radius:8px;display:grid;min-height:0;overflow:hidden;padding:22px}.result-image{border-radius:8px;box-shadow:var(--shadow);max-height:calc(100vh - 150px);max-width:100%;object-fit:contain}.state-block{align-items:center;color:var(--muted);display:grid;grid-gap:12px;gap:12px;justify-items:center;min-height:260px;text-align:center}.state-block p{margin:0}.state-block.error{color:#a33327;max-width:520px;justify-self:center}.spin{animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}@media (max-width:900px){.app-shell{grid-template-columns:1fr}.control-panel{min-height:auto}.preview-stage{min-height:480px}}@media (max-width:520px){.app-shell{padding:10px}.control-panel{padding:16px}.mode-tabs,.segmented-grid,.segmented-grid.three{grid-template-columns:1fr}}