:root{--bg-page:#f7f6f3;--bg-sidebar:#f0efeb;--bg-card:#fff;--bg-hover:#eceae5;--bg-active:#e0deda;--border:#e4e2dd;--border-strong:#ccc9c2;--text-primary:#1a1918;--text-secondary:#6b6966;--text-muted:#9e9c98;--accent:#1a73e8;--accent-light:#e8f0fe;--accent-dark:#1557b0;--danger:#d93025;--danger-light:#fce8e6;--success:#1e8e3e;--warning:#f9ab00;--shadow-sm:0 1px 2px #0000000f;--shadow:0 2px 8px #00000014;--shadow-lg:0 8px 24px #0000001f;--radius:8px;--radius-sm:5px;--radius-lg:12px;--sidebar-w:260px;--topbar-h:52px;--font:"Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--code-font:"JetBrains Mono", "Fira Code", monospace;--transition:.15s ease}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{width:100%;height:100%;overflow:hidden}body{font-family:var(--font);background:var(--bg-page);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.6}::selection{color:var(--text-primary);background:#cce0f5}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}button{cursor:pointer;background:0 0;border:none;font-family:inherit}input,textarea{outline:none;font-family:inherit}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{height:100vh;display:flex;overflow:hidden}.topbar{height:var(--topbar-h);background:var(--bg-card);border-bottom:1px solid var(--border);z-index:20;box-shadow:var(--shadow-sm);flex-shrink:0;align-items:center;gap:12px;padding:0 16px;display:flex}.topbar-left{align-items:center;gap:8px;display:flex}.topbar-center{flex:1;align-items:center;gap:8px;min-width:0;display:flex}.topbar-right{flex-shrink:0;align-items:center;gap:8px;display:flex}.icon-btn{border-radius:var(--radius-sm);width:32px;height:32px;color:var(--text-secondary);transition:background var(--transition), color var(--transition);flex-shrink:0;justify-content:center;align-items:center;font-size:18px;display:flex}.icon-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.icon-btn.active{background:var(--accent-light);color:var(--accent)}.title-input{border-radius:var(--radius-sm);color:var(--text-primary);min-width:120px;max-width:400px;transition:border-color var(--transition), background var(--transition);background:0 0;border:1px solid #0000;padding:4px 10px;font-size:15px;font-weight:600}.title-input:hover{background:var(--bg-hover)}.title-input:focus{background:var(--bg-card);border-color:var(--accent)}.breadcrumb{color:var(--text-muted);align-items:center;gap:4px;font-size:13px;display:flex}.breadcrumb-sep{color:var(--border-strong)}.word-count{color:var(--text-muted);white-space:nowrap;flex-shrink:0;font-size:12px}.btn{border-radius:var(--radius-sm);transition:all var(--transition);cursor:pointer;border:none;align-items:center;gap:5px;padding:6px 14px;font-family:inherit;font-size:13px;font-weight:500;display:inline-flex}.btn-primary:hover{background:var(--accent-dark)}.btn-ghost{color:var(--text-secondary);border:1px solid var(--border);background:0 0}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#b71c1c}.btn-sm{padding:4px 10px;font-size:12px}.sidebar{width:var(--sidebar-w);min-width:var(--sidebar-w);background:var(--bg-sidebar);border-right:1px solid var(--border);flex-direction:column;flex-shrink:0;transition:width .2s,min-width .2s;display:flex;overflow:hidden}.sidebar.collapsed{width:0;min-width:0}.sidebar-header{border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:6px;padding:12px 12px 8px;display:flex}.sidebar-logo{color:var(--accent);white-space:nowrap;letter-spacing:-.3px;flex:1;font-size:14px;font-weight:700;overflow:hidden}.new-doc-btn{background:var(--accent);color:#fff;border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);white-space:nowrap;border:none;align-items:center;gap:4px;padding:5px 10px;font-size:12px;font-weight:500;display:flex}.new-doc-btn:hover{background:var(--accent-dark)}.tree-scroll{flex:1;padding:6px 0;overflow-y:auto}.tree-node{-webkit-user-select:none;user-select:none}.tree-item{cursor:pointer;transition:background var(--transition);border-radius:0;align-items:center;gap:6px;min-height:34px;padding:5px 12px;display:flex;position:relative}.tree-item:hover{background:var(--bg-hover)}.tree-item.active{background:var(--accent-light);color:var(--accent)}.tree-item.active:before{content:"";background:var(--accent);border-radius:0 2px 2px 0;width:3px;position:absolute;top:4px;bottom:4px;left:0}.tree-toggle{width:20px;height:20px;color:var(--text-muted);transition:transform var(--transition), background var(--transition);cursor:pointer;border-radius:3px;flex-shrink:0;justify-content:center;align-items:center;font-size:10px;display:flex}.tree-toggle:hover{background:var(--bg-active)}.tree-toggle.open{transform:rotate(90deg)}.tree-toggle.hidden{visibility:hidden}.tree-icon{flex-shrink:0;font-size:14px}.tree-label{white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;font-size:13.5px;overflow:hidden}.tree-actions{opacity:0;transition:opacity var(--transition);gap:2px;display:flex}.tree-item:hover .tree-actions{opacity:1}.tree-action-btn{width:22px;height:22px;color:var(--text-muted);cursor:pointer;transition:background var(--transition), color var(--transition);border-radius:3px;justify-content:center;align-items:center;font-size:12px;display:flex}.tree-action-btn:hover{background:var(--bg-active);color:var(--text-primary)}.tree-action-btn.danger:hover{color:var(--danger)}.tree-children{padding-left:12px}.main{flex-direction:column;flex:1;min-width:0;display:flex;overflow:hidden}.doc-area{flex-direction:column;flex:1;align-items:center;padding:40px 60px 120px;display:flex;overflow-y:auto}.doc-content{width:100%;max-width:720px;min-height:60vh}.block{border-radius:var(--radius-sm);transition:background var(--transition);align-items:flex-start;gap:6px;margin:1px 0;padding:3px 0;display:flex;position:relative}.block:hover .block-grip,.block:hover .block-add{opacity:1}.block.selected{background:var(--accent-light)}.block.selected:before{content:"";background:var(--accent);border-radius:2px;width:3px;position:absolute;top:6px;bottom:6px;left:-4px}.block-grip{opacity:0;cursor:grab;color:var(--text-muted);transition:opacity var(--transition);border-radius:3px;padding:4px 2px;font-size:11px;position:absolute;top:50%;left:-28px;transform:translateY(-50%)}.block-grip:hover{background:var(--bg-hover)}.block-grip:active{cursor:grabbing}.block-add{opacity:0;background:var(--bg-hover);border:1px solid var(--border);width:22px;height:22px;color:var(--text-secondary);transition:opacity var(--transition), background var(--transition);cursor:pointer;border-radius:4px;justify-content:center;align-items:center;font-size:14px;display:flex;position:absolute;top:4px;left:-44px}.block-add:hover{background:var(--bg-active);color:var(--accent)}.block-inner{flex:1;min-width:0}.editable{width:100%;min-height:1.5em;color:var(--text-primary);caret-color:var(--accent);word-break:break-word;background:0 0;border:none;outline:none;font-size:15px;line-height:1.7}.editable:empty:before{content:attr(data-placeholder);color:var(--text-muted);pointer-events:none}.editable.h1{letter-spacing:-.5px;margin:20px 0 6px;font-size:30px;font-weight:700;line-height:1.3}.editable.h2{margin:16px 0 4px;font-size:22px;font-weight:600;line-height:1.4}.editable.h3{margin:12px 0 2px;font-size:17px;font-weight:600;line-height:1.4}.editable.code{font-family:var(--code-font);border:1px solid var(--border);border-radius:var(--radius-sm);color:#24292f;white-space:pre-wrap;background:#f6f8fa;padding:14px 16px;font-size:13px;line-height:1.6;overflow-x:auto}.editable.quote{border-left:3px solid var(--accent);color:var(--text-secondary);padding-left:14px;font-size:15px;font-style:italic}.editable.todo-done{color:var(--text-muted);text-decoration:line-through}.list-row{padding-left:calc(var(--indent,0) * 24px);align-items:flex-start;gap:8px;display:flex}.list-bullet{background:var(--text-muted);border-radius:50%;flex-shrink:0;width:6px;height:6px;margin-top:8px}.list-num{color:var(--text-muted);text-align:right;flex-shrink:0;min-width:20px;margin-top:3px;font-size:13px}.list-input{flex:1;min-height:1.5em}.todo-row{padding-left:calc(var(--indent,0) * 24px);align-items:flex-start;gap:10px;display:flex}.todo-check{border:2px solid var(--border-strong);cursor:pointer;width:18px;height:18px;transition:all var(--transition);color:#fff;background:0 0;border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;margin-top:3px;font-size:11px;display:flex}.todo-check.checked{background:var(--accent);border-color:var(--accent)}.todo-check:hover:not(.checked){border-color:var(--accent)}.block-divider{background:var(--border);width:100%;height:1px;margin:14px 0}.block-image{border-radius:var(--radius);cursor:pointer;max-width:100%;transition:opacity var(--transition);display:block}.block-image:hover{opacity:.85}.block-image-placeholder{background:var(--bg-hover);border:2px dashed var(--border-strong);border-radius:var(--radius);text-align:center;color:var(--text-muted);cursor:pointer;transition:border-color var(--transition), background var(--transition);padding:32px;font-size:13px}.block-image-placeholder:hover{border-color:var(--accent);background:var(--accent-light)}.menu-overlay{z-index:500;position:fixed;inset:0}.menu{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);z-index:501;min-width:210px;max-height:340px;box-shadow:var(--shadow-lg);padding:6px;position:absolute;overflow-y:auto}.menu-search{background:var(--bg-page);border:1px solid var(--border);border-radius:var(--radius-sm);width:100%;color:var(--text-primary);box-sizing:border-box;transition:border-color var(--transition);margin-bottom:4px;padding:6px 10px;font-size:13px}.menu-search:focus{border-color:var(--accent);outline:none}.menu-item{border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);align-items:center;gap:10px;padding:7px 10px;display:flex}.menu-item:hover,.menu-item.active{background:var(--bg-hover)}.menu-icon{text-align:center;flex-shrink:0;width:26px;font-size:16px}.menu-label{color:var(--text-primary);flex:1;font-size:13px}.menu-hint{color:var(--text-muted);font-size:11px}.menu-empty{text-align:center;color:var(--text-muted);padding:16px;font-size:13px}.login-page{background:var(--bg-page);justify-content:center;align-items:center;height:100vh;display:flex}.login-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);width:360px;box-shadow:var(--shadow-lg);padding:40px}.login-logo{text-align:center;margin-bottom:8px;font-size:32px}.login-title{text-align:center;margin-bottom:4px;font-size:20px;font-weight:700}.login-sub{color:var(--text-muted);text-align:center;margin-bottom:28px;font-size:13px}.login-form{flex-direction:column;gap:12px;display:flex}.login-input{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-page);width:100%;color:var(--text-primary);transition:border-color var(--transition);padding:10px 14px;font-size:14px}.login-input:focus{border-color:var(--accent);background:var(--bg-card);outline:none}.login-error{color:var(--danger);background:var(--danger-light);border-radius:var(--radius-sm);padding:8px 12px;font-size:12px}.login-btn{background:var(--accent);color:#fff;border-radius:var(--radius-sm);cursor:pointer;width:100%;transition:background var(--transition);border:none;padding:10px;font-size:14px;font-weight:600}.login-btn:hover{background:var(--accent-dark)}.login-hint{color:var(--text-muted);text-align:center;margin-top:16px;font-size:11px}.login-guest-btn{border:1.5px solid var(--border);width:100%;color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:8px;margin-top:12px;padding:10px;font-size:14px;transition:all .2s}.login-guest-btn:hover{border-color:var(--primary);color:var(--primary);background:#3b82f60a}.empty-state{height:100%;color:var(--text-muted);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;padding:40px;display:flex}.empty-desc{text-align:center;max-width:280px;font-size:13px;line-height:1.6}.ctx-overlay{z-index:600;position:fixed;inset:0}.ctx-menu{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);z-index:601;min-width:160px;box-shadow:var(--shadow-lg);padding:4px;position:absolute}.ctx-item{border-radius:var(--radius-sm);cursor:pointer;color:var(--text-primary);transition:background var(--transition);align-items:center;gap:8px;padding:7px 12px;font-size:13px;display:flex}.ctx-item:hover{background:var(--bg-hover)}.ctx-item.danger{color:var(--danger)}.ctx-item.danger:hover{background:var(--danger-light)}.ctx-divider{background:var(--border);height:1px;margin:4px 0}.modal-overlay{z-index:700;background:#0006;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);width:400px;max-width:90%;box-shadow:var(--shadow-lg);padding:28px}.modal-title{margin-bottom:16px;font-size:16px;font-weight:700}.modal-input{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-page);width:100%;color:var(--text-primary);transition:border-color var(--transition);margin-bottom:12px;padding:9px 12px;font-size:14px}.modal-input:focus{border-color:var(--accent);background:var(--bg-card);outline:none}.modal-select{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-page);width:100%;color:var(--text-primary);margin-bottom:12px;padding:9px 12px;font-size:14px}.modal-actions{justify-content:flex-end;gap:8px;margin-top:20px;display:flex}.modal-desc{color:var(--text-secondary);margin-bottom:16px;font-size:13px;line-height:1.5}.modal-warning{color:var(--danger);margin-top:8px;font-size:12px}.public-banner{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);color:var(--text-secondary);box-shadow:var(--shadow);z-index:100;align-items:center;gap:8px;padding:10px 16px;font-size:13px;display:flex;position:fixed;bottom:20px;right:20px}.upload-progress{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);z-index:999;align-items:center;gap:10px;padding:10px 20px;font-size:13px;animation:.2s slideUp;display:flex;position:fixed;bottom:20px;left:50%;transform:translate(-50%)}@keyframes slideUp{0%{opacity:0;transform:translate(-50%)translateY(10px)}to{opacity:1;transform:translate(-50%)translateY(0)}}.block.drag-over:after{content:"";background:var(--accent);border-radius:2px;height:3px;position:absolute;top:-2px;left:0;right:0}.editor-wrapper{flex:1;display:flex;overflow:hidden}.doc-area{flex:1;overflow:hidden auto}.doc-content{background:var(--bg-card);border-radius:var(--radius);max-width:720px;box-shadow:var(--shadow-sm);min-height:600px;margin:0 auto;padding:32px 48px}.editor-empty{background:var(--bg-page);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:16px;display:flex}.empty-icon{opacity:.4;font-size:64px}.empty-title{color:var(--text-secondary);font-size:20px;font-weight:600}.editor-toolbar{background:var(--bg-card);border-right:1px solid var(--border);flex-direction:column;width:72px;min-width:72px;display:flex;overflow-y:auto}.toolbar-title{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;text-align:center;padding:12px 8px 8px;font-size:11px;font-weight:600}.toolbar-list{flex-direction:column;gap:4px;padding:0 6px;display:flex}.toolbar-item{border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);background:0 0;border:none;flex-direction:column;align-items:center;gap:2px;padding:8px 4px;display:flex}.toolbar-item:hover{background:var(--bg-hover)}.toolbar-icon{color:var(--text-secondary);font-size:16px;font-weight:700;font-family:var(--code-font)}.toolbar-label{color:var(--text-muted);font-size:10px}.toolbar-item:hover .toolbar-icon{color:var(--accent)}.toolbar-item:hover .toolbar-label{color:var(--text-secondary)}.format-toolbar{background:var(--bg-card);border-bottom:1px solid var(--border);flex-direction:column;flex-shrink:0;gap:4px;padding:8px 12px;display:flex}.toolbar-group{align-items:center;gap:2px;display:flex}.toolbar-separator{background:var(--border);width:1px;height:22px;margin:0 6px}.toolbar-btn-wrap{position:relative}.toolbar-btn{border-radius:var(--radius-sm);min-width:28px;height:28px;color:var(--text-secondary);cursor:pointer;transition:background var(--transition), color var(--transition);white-space:nowrap;background:0 0;border:none;justify-content:center;align-items:center;padding:0 6px;font-size:13px;font-weight:500;display:flex}.toolbar-btn:hover{background:var(--bg-hover);color:var(--text-primary)}.toolbar-btn.active{background:var(--accent-light);color:var(--accent)}.toolbar-dropdown-wrap{position:relative}.toolbar-dropdown{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);min-width:120px;box-shadow:var(--shadow-lg);z-index:100;margin-top:4px;position:absolute;top:100%;left:0;overflow:hidden}.dropdown-item{cursor:pointer;transition:background var(--transition);padding:8px 14px;font-size:13px}.dropdown-item:hover{background:var(--bg-hover)}.editor-wrapper.fullscreen{z-index:1000;background:var(--bg-page);position:fixed;inset:0}.editor-wrapper.fullscreen .doc-area{height:calc(100vh - 90px)}.color-picker-popover{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);z-index:200;min-width:200px;margin-top:6px;padding:10px;position:absolute;top:100%;left:0}.color-picker-grid{grid-template-columns:repeat(8,1fr);gap:4px;display:grid}.color-swatch{cursor:pointer;width:22px;height:22px;transition:transform var(--transition), box-shadow var(--transition);border:1px solid #00000026;border-radius:4px}.color-swatch:hover{transform:scale(1.2);box-shadow:0 2px 6px #0003}.color-picker-popover.bgcolor .color-picker-grid{grid-template-columns:repeat(5,1fr)}.emoji-popover{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-lg);z-index:200;margin-top:6px;padding:10px;position:absolute;top:100%;left:0}.emoji-grid{grid-template-columns:repeat(5,1fr);gap:4px;display:grid}.emoji-btn{border-radius:var(--radius-sm);cursor:pointer;width:36px;height:36px;transition:background var(--transition), transform var(--transition);background:0 0;border:none;justify-content:center;align-items:center;font-size:20px;display:flex}.emoji-btn:hover{background:var(--bg-hover);transform:scale(1.2)}.editable-table{border-collapse:collapse;margin:12px 0;font-size:15px}.editable-table td{border:1px solid var(--border);vertical-align:top;outline:none;min-width:80px;padding:8px}.editable-table td:focus{background:#4285f40f;border-color:#4285f4}.editable-table tr:first-child td{background:#f8f9fa;font-weight:500}.fontsize-input-wrap{align-items:center;gap:6px;padding:8px;display:flex}.fontsize-input{border:1px solid var(--border);border-radius:var(--radius-sm);text-align:center;width:60px;height:30px;transition:border-color var(--transition);outline:none;padding:0 6px;font-size:13px}.fontsize-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px #4285f426}.fontsize-unit{color:var(--text-muted);font-size:13px}.fontsize-apply{background:var(--accent);color:#fff;border-radius:var(--radius-sm);cursor:pointer;height:28px;transition:opacity var(--transition);border:none;padding:0 12px;font-size:12px}.fontsize-apply:hover{opacity:.85}.table-dialog-overlay{z-index:9999;background:#00000059;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.table-dialog{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow-lg);min-width:300px;padding:24px}.table-dialog-title{color:var(--text-primary);margin-bottom:16px;font-size:16px;font-weight:600}.table-dialog-body{flex-direction:column;gap:12px;margin-bottom:20px;display:flex}.table-dialog-body 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