:root{--blue-700:#124fb5;--blue-600:#1769e0;--blue-100:#e9f1ff;--blue-50:#f4f8ff;--green-600:#12805c;--green-100:#e8f6f0;--ink:#172033;--muted:#687386;--line:#d8deea;--surface:#fff;--workspace:#e9edf3;--panel:#f7f9fc;--danger:#c43d4b;--paper-shadow:0 12px 30px #232e4224, 0 2px 6px #232e4214;color:var(--ink);background:var(--workspace);font-synthesis:none;text-rendering:optimizelegibility;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body,#app{width:100%;height:100%;margin:0}body{min-width:1240px;overflow:hidden}button,input,select{font:inherit}button,select{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline-offset:2px;outline:2px solid #2f7af873}.app-shell{background:var(--workspace);flex-direction:column;height:100vh;display:flex;overflow:hidden}.app-header{z-index:20;background:#fff;border-bottom:1px solid #cfd7e5;grid-template-columns:1fr auto 1fr;align-items:center;min-height:68px;padding:0 20px;display:grid;box-shadow:0 1px 4px #1b273b0f}.header-leading,.header-actions,.header-center,.template-heading,.context-actions,.instruction,.pane-title,.preview-status,.control-palette,.data-source,.sample-select,.save-indicator,.position-readout,.toast-message{align-items:center;display:flex}.header-leading{gap:12px}.icon-button{border:1px solid var(--line);color:#39455a;background:#fff;border-radius:5px;place-items:center;width:34px;height:34px;padding:0;display:grid}.icon-button:hover{background:var(--blue-50);border-color:#9eb1d0}.breadcrumb{color:#7a8597;margin-bottom:3px;font-size:11px}.template-heading{gap:9px;font-size:16px;font-weight:700}.draft-badge{color:#9a630b;background:#fff8e8;border:1px solid #f2d7a7;border-radius:999px;padding:2px 7px;font-size:10px;font-weight:600}.header-center{color:#43607f;background:#f7faff;border:1px solid #d6e3f8;border-radius:5px;gap:8px;padding:7px 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20px;display:flex}.instruction{color:#566174;gap:7px;font-size:12px}.instruction svg{color:var(--blue-600)}.context-actions{gap:18px}.save-indicator{color:#647084;gap:7px;font-size:11px}.save-indicator.dirty{color:#a15c0a}.save-indicator.dirty .save-dot{background:#f2a124;box-shadow:0 0 0 3px #f2a12424}.help-button{color:#506177;background:0 0;border:0;height:28px;padding:0 8px;font-weight:500}.workspace{flex:1;grid-template-columns:minmax(680px,1fr) minmax(680px,1fr);min-height:0;display:grid;overflow-x:auto}.pane{background:var(--panel);flex-direction:column;min-width:0;min-height:0;display:flex}.design-pane{border-right:1px solid #bfc9d8}.pane-header{border-bottom:1px solid var(--line);background:#fff;flex:0 0 52px;justify-content:space-between;align-items:center;padding:0 16px;display:flex}.pane-title{gap:10px}.pane-title>div{flex-direction:column;gap:2px;display:flex}.pane-title strong{font-size:13px}.pane-title div span{color:#7a8596;font-size:10px}.step-number{width:27px;height:27px;color:var(--blue-700);background:var(--blue-100);border-radius:4px;place-items:center;font-size:10px;font-weight:800;display:grid}.step-number.preview{color:#0d7653;background:var(--green-100)}.property-toggle{border:1px solid var(--line);color:#5b6678;background:#fff;height:29px;padding:0 9px;font-weight:500}.property-toggle.active{color:var(--blue-700);background:var(--blue-50);border-color:#b8cef2}.control-palette,.preview-toolbar{border-bottom:1px solid var(--line);background:#fbfcfe;flex:0 0 48px;gap:7px;padding:0 12px}.palette-label{color:#7b8596;letter-spacing:.08em;margin-right:2px;font-size:10px;font-weight:700}.palette-item{color:#3d4a5d;background:#fff;border:1px solid #d6ddea;border-radius:4px;align-items:center;gap:6px;height:30px;padding:0 8px;font-size:11px;display:inline-flex}.palette-item:hover{color:var(--blue-700);background:var(--blue-50);border-color:#9ebcf0}.palette-item svg:first-child{color:var(--blue-600)}.drag-mark{color:#a6b0bf!important}.designer-body{flex:1;min-height:0;display:flex}.canvas-scroll{background-color:var(--workspace);background-image:radial-gradient(#c9d1de .7px,#0000 .7px);background-size:16px 16px;flex:1;min-width:0;padding:43px 30px 42px;position:relative;overflow:auto}.canvas-caption{color:#788397;justify-content:space-between;width:595px;font-size:10px;display:flex;position:absolute;top:12px;left:50%;transform:translate(-50%)}.preview-canvas{background-color:#e5eaf1;background-image:none}.letter-page{color:#151515;width:595px;height:842px;box-shadow:var(--paper-shadow);background:#fff;margin:0 auto;font-family:Noto Serif SC,Songti SC,SimSun,serif;position:relative;overflow:visible}.letter-page.mode-design{box-shadow:0 0 0 1px #adc6ee, var(--paper-shadow)}.letter-title{text-align:center;letter-spacing:.2em;width:100%;margin:0;font-family:Songti SC,SimSun,serif;font-size:24px;font-weight:700;position:absolute;top:31px;left:0}.letter-meta{color:#333;width:116px;font-size:9px;line-height:22px;position:absolute;top:67px;right:42px}.salutation{font-size:12px;font-weight:700;position:absolute;top:121px;left:42px}.intro-copy{text-align:justify;text-indent:2em;width:511px;font-size:10px;line-height:2.55;position:absolute;top:162px;left:42px}.intro-copy p{margin:0}.copy-line{white-space:nowrap;height:26px}.copy-line.second{text-indent:0}.template-slot{vertical-align:baseline;border-bottom:1px solid #999;display:inline-block}.template-slot.small{width:55px}.template-slot.date{width:88px}.template-slot.recipient{width:188px}.template-slot.firm{width:190px}.template-slot.year{width:74px}.contact-block{border:1px solid #7a7a7a;width:511px;min-height:69px;padding:8px 10px;font-size:9px;line-height:28px;position:absolute;top:265px;left:42px}.template-slot.company{width:210px}.template-slot.address{width:355px}.contact-row{justify-content:space-between;line-height:16px;display:flex}.confirmation-section{width:511px;position:absolute;top:382px;left:42px}.section-line{margin-bottom:8px;font-size:10px}.section-line span{width:18px;display:inline-block}.letter-table{border-collapse:collapse;table-layout:fixed;text-align:center;width:100%;font-size:9px}.letter-table th,.letter-table td{border:1px solid #555;height:30px;padding:3px 5px;font-weight:400}.letter-table th{height:48px;line-height:1.45}.letter-table th:first-child{width:94px}.letter-table th:nth-child(2),.letter-table th:nth-child(3){width:122px}.amount-cell{text-align:right}.cell-slot{border-bottom:1px dotted #aaa;height:14px;display:block}.reply-section{width:511px;position:absolute;top:567px;left:42px}.reply-options{border:1px solid #777;padding:10px 18px;font-size:10px;line-height:28px}.signature-copy{width:210px;font-size:10px;line-height:28px;position:absolute;top:681px;left:323px}.signature-date{text-align:right}.stamp-slot{color:#999;border:1px dashed #aaa;place-items:center;width:94px;height:62px;font-size:9px;display:grid;position:absolute;top:680px;left:428px}.letter-footer{color:#777;border-top:1px solid #aaa;justify-content:space-between;padding-top:7px;font-family:Microsoft YaHei,sans-serif;font-size:8px;display:flex;position:absolute;bottom:24px;left:42px;right:42px}.template-field{z-index:5;white-space:nowrap;border:0;border-radius:2px;align-items:center;padding:2px 5px;font-family:Noto Serif SC,Songti SC,SimSun,serif;line-height:1.2;display:flex;position:absolute;overflow:visible}.template-field .field-content{text-overflow:ellipsis;width:100%;display:block;overflow:hidden}.mode-design .template-field{color:#1455b3;cursor:grab;background:#e7f1fff0;border:1px dashed #4c8def;font-family:Microsoft 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span{position:absolute;bottom:3px;transform:translate(-50%)}.ruler-vertical{border-right:1px solid #abc0df;width:18px;height:842px;top:0;left:-18px}.ruler-vertical span{position:absolute;right:3px;transform:translateY(-50%)rotate(-90deg)}.property-panel{border-left:1px solid var(--line);background:#fff;flex:0 0 232px;padding:16px;overflow-y:auto;box-shadow:-4px 0 12px #2631430d}.property-heading{border-bottom:1px solid #e5e9f0;justify-content:space-between;align-items:flex-start;margin-bottom:18px;padding-bottom:14px;display:flex}.property-heading>div{flex-direction:column;gap:4px;display:flex}.property-heading strong{text-overflow:ellipsis;white-space:nowrap;max-width:140px;font-size:13px;overflow:hidden}.eyebrow{color:#8a94a4;letter-spacing:.08em;font-size:9px;font-weight:700}.kind-tag{color:var(--blue-700);background:var(--blue-100);border-radius:3px;padding:3px 6px;font-family:Consolas,monospace;font-size:9px}.field-group{color:#596579;flex-direction:column;gap:6px;margin-bottom:14px;font-size:10px;font-weight:600;display:flex}.field-group input,.field-group select{color:#253146;background:#fff;border:1px solid #d2d9e5;border-radius:4px;width:100%;height:32px;padding:0 9px;font-size:11px;font-weight:400}.field-group input:hover,.field-group select:hover{border-color:#a9bbd4}.select-wrap,.input-suffix{position:relative}.select-wrap select{appearance:none;padding-right:28px}.select-wrap svg{color:#7b8799;pointer-events:none;position:absolute;top:9px;right:9px}.property-grid{grid-template-columns:1fr 1fr;gap:8px;display:grid}.input-suffix input{padding-right:25px}.input-suffix span{color:#8993a3;font-size:9px;font-weight:400;position:absolute;top:9px;right:8px}.segmented-control{background:#f6f8fb;border:1px solid #d2d9e5;border-radius:4px;grid-template-columns:repeat(3,1fr);height:32px;padding:2px;display:grid}.segmented-control button{color:#7a8595;background:0 0;border:0;border-radius:3px;place-items:center;display:grid}.segmented-control button.active{color:var(--blue-700);background:#fff;box-shadow:0 1px 4px #202f461f}.position-readout{color:#768195;background:#f7f9fc;border:1px solid #e1e6ee;border-radius:4px;justify-content:space-between;margin:5px 0 16px;padding:8px;font-family:Consolas,monospace;font-size:9px}.delete-button{width:100%;height:32px;color:var(--danger);background:#fff8f8;border:1px solid #efd2d6;font-weight:500}.delete-button:hover{background:#fff1f2;border-color:#e7adb5}.empty-properties{color:#657084;text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:300px;display:flex}.empty-icon{width:40px;height:40px;color:var(--blue-600);background:var(--blue-100);border-radius:50%;place-items:center;margin-bottom:12px;display:grid}.empty-properties strong{font-size:12px}.empty-properties p{color:#8a94a3;margin:7px 2px;font-size:10px;line-height:1.7}.preview-toolbar{align-items:center;display:flex}.data-source{color:#526175;gap:6px;font-size:11px;font-weight:600}.data-source svg{color:var(--green-600)}.sample-select{margin-left:5px;position:relative}.sample-select select{color:#344154;appearance:none;background:#fff;border:1px solid #d2d9e5;border-radius:4px;width:205px;height:30px;padding:0 28px 0 9px;font-size:11px}.sample-select svg{color:#758094;pointer-events:none;position:absolute;right:8px}.page-indicator{color:#768195;margin-left:auto;font-size:10px}.preview-status{color:var(--green-600);gap:7px;font-size:11px;font-weight:600}.toast-message{z-index:50;background:#fff;border:1px solid #cee8db;border-radius:6px;gap:10px;min-width:250px;padding:12px 14px;position:fixed;top:80px;right:22px;box-shadow:0 12px 30px #202f422e}.toast-check{color:#fff;background:var(--green-600);border-radius:50%;place-items:center;width:28px;height:28px;display:grid}.toast-message>div{flex-direction:column;gap:3px;display:flex}.toast-message strong{font-size:12px}.toast-message div span{color:#768195;font-size:10px}.toast-enter-active,.toast-leave-active{transition:all .18s}.toast-enter-from,.toast-leave-to{opacity:0;transform:translateY(-8px)}@media (height<=820px){.letter-page{zoom:.82}.canvas-caption{width:488px}}