:root{--bg-page: linear-gradient(180deg, #f0fdfa 0%, #f5f7fa 28%);--bg-panel: #fff;--text-primary: #334155;--text-secondary: #64748b;--border: #e2e8f0;--header-accent: #0d9488;--panel-header-bg: #0d9488}*{box-sizing:border-box}body{margin:0;padding:0;font-family:"Noto Serif SC",Optima,Microsoft YaHei,PingFang SC,serif;background:var(--bg-page);min-height:100vh;color:var(--text-primary)}.app-layout{display:flex;min-height:100vh}.draft-sidebar{width:240px;flex-shrink:0;background:var(--bg-panel);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;transition:width .2s ease}.draft-sidebar.collapsed{width:48px}.draft-sidebar.collapsed .draft-sidebar-header{justify-content:center;padding:12px 8px}.sidebar-toggle{flex-shrink:0;width:28px;height:28px;padding:0;border:none;border-radius:6px;background:#ffffff40;color:#fff;font-size:12px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-family:inherit}.sidebar-toggle:hover{background:#fff6}.draft-sidebar-header{padding:12px 14px;display:flex;align-items:center;justify-content:space-between;gap:8px;border-bottom:1px solid var(--border);background:linear-gradient(135deg,#0d9488,#14b8a6);color:#fff}.draft-sidebar-title{font-weight:600;font-size:15px}.draft-sidebar-btn-new{padding:6px 12px;border:none;border-radius:6px;background:#ffffff40;color:#fff;font-size:13px;cursor:pointer;font-family:inherit;display:inline-flex}.draft-sidebar-btn-new:hover{background:#fff6}.draft-sidebar-toolbar{padding:8px 14px;border-bottom:1px solid var(--border);background:var(--bg-panel)}.draft-sidebar-list-label{font-size:12px;color:var(--text-secondary)}.draft-sidebar-body{flex:1;overflow-y:auto;padding:8px 0}.draft-sidebar-empty{padding:24px 16px;text-align:center}.draft-sidebar-empty-icon{font-size:32px;margin:0 0 8px;opacity:.6}.draft-sidebar-empty-icon img{width:28px;height:28px;object-fit:contain;vertical-align:middle}.draft-sidebar-empty-text{font-size:14px;color:var(--text-secondary);margin:0 0 12px}.draft-sidebar-empty-hint{font-size:12px;color:var(--text-secondary);line-height:1.6;margin:0;opacity:.9}.draft-file-list{list-style:none;margin:0;padding:0}.draft-file-item{display:flex;align-items:center;gap:10px;padding:10px 14px;margin:0 4px 2px;border-radius:6px;cursor:pointer;transition:background .15s}.draft-file-item:hover{background:var(--border)}.draft-file-item.active{background:#0d94881f}.draft-file-item:hover .draft-file-delete{opacity:1}.draft-file-icon{flex-shrink:0;font-size:18px}.draft-file-icon img,.draft-sidebar-btn-icon{width:16px;height:16px;margin-right:4px;object-fit:contain;vertical-align:middle}.draft-file-delete-icon{width:14px;height:14px;object-fit:contain;vertical-align:middle}.draft-file-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.draft-file-name{font-size:13px;font-weight:500;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.draft-file-time{font-size:11px;color:var(--text-secondary)}.draft-file-delete{flex-shrink:0;width:22px;height:22px;padding:0;border:none;border-radius:4px;background:transparent;color:var(--text-secondary);font-size:16px;line-height:1;cursor:pointer;opacity:0;transition:opacity .15s,background .15s}.draft-file-item:hover .draft-file-delete:hover{background:#c83c3c26;color:#c53030}.app-main{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column;padding:20px}.tool-header{position:relative;text-align:center;padding:24px;margin-bottom:20px}.tool-header h1{color:var(--header-accent);font-size:28px;margin:0}.tool-header p{color:var(--text-secondary);margin:8px 0 0}.theme-bar{width:100%;margin-bottom:20px;display:flex;gap:24px;align-items:stretch;box-sizing:border-box}.theme-options{flex:0 0 280px;display:flex;flex-direction:column;gap:14px;padding:16px;background:var(--bg-panel);border:1px solid var(--border);border-radius:10px;min-width:0}.theme-group{display:flex;flex-direction:column;gap:6px}.theme-group label{font-weight:600;font-size:13px;color:var(--text-primary)}.theme-group select{padding:8px 12px;border-radius:8px;border:1px solid var(--border);font-size:14px;width:100%;max-width:100%;background:var(--bg-panel);color:var(--text-primary);box-sizing:border-box}.theme-group select option{background:var(--bg-panel);color:var(--text-primary)}.theme-preview-wrap{flex:1 1 0;min-width:0;display:flex;flex-direction:column;padding:16px;background:var(--bg-panel);border:1px solid var(--border);border-radius:10px;box-sizing:border-box}.theme-preview-label{font-size:12px;color:var(--text-secondary);margin-bottom:8px;flex-shrink:0}.theme-preview-inner{flex:1;min-height:120px;font-size:14px;line-height:1.6;overflow:auto}.right-sidebar{flex-shrink:0;background:var(--bg-panel);border-left:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden;position:relative;transition:width .2s ease}.right-sidebar.collapsed{width:48px}.right-sidebar-header-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:12px;border-bottom:1px solid rgba(255,255,255,.2);background:linear-gradient(135deg,#0d9488,#14b8a6);color:#fff;flex-shrink:0}.right-sidebar.collapsed .right-sidebar-header-row{justify-content:center;padding:12px 8px}.right-sidebar.collapsed 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