:root{--primary: #1677ff;--primary-hover: #4096ff;--primary-active: #0958d9;--primary-bg: #e6f4ff;--primary-border: #91caff;--text-1: #1f1f1f;--text-2: #595959;--text-3: #8c8c8c;--text-4: #bfbfbf;--bg: #ffffff;--bg-subtle: #fafafa;--bg-hover: #f5f5f5;--border: #f0f0f0;--border-strong: #d9d9d9;--success: #52c41a;--warning: #faad14;--danger: #ff4d4f;--radius-sm: 6px;--radius: 10px;--radius-lg: 14px;--shadow-sm: 0 1px 2px rgba(0,0,0,.04);--shadow: 0 2px 8px rgba(0,0,0,.06);--shadow-lg: 0 6px 24px rgba(0,0,0,.1);--header-height: 56px;--bottom-bar-height: 56px;--safe-bottom: env(safe-area-inset-bottom, 0px)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{margin:0;padding:0;height:100%;width:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:14px;color:var(--text-1);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow:hidden}button,input,textarea,select{font-family:inherit;font-size:inherit;color:var(--text-1)}button{cursor:pointer;border:none;background:none;color:inherit}input,textarea,select{outline:none}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-hover)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:8px 16px;border-radius:var(--radius);font-size:14px;font-weight:500;line-height:1.5;transition:all .15s ease;white-space:nowrap;-webkit-user-select:none;user-select:none;border:1px solid transparent}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover)}.btn-primary:active:not(:disabled){background:var(--primary-active)}.btn-ghost{background:transparent;color:var(--text-2);border-color:var(--border-strong)}.btn-ghost:hover:not(:disabled){color:var(--primary);border-color:var(--primary);background:var(--primary-bg)}.btn-text{background:transparent;color:var(--text-2);padding:6px 10px}.btn-text:hover{color:var(--primary);background:var(--primary-bg)}.btn-danger{color:var(--danger);background:transparent}.btn-danger:hover{background:#fff1f0}.btn-block{width:100%}.btn-lg{padding:12px 24px;font-size:16px}.btn-sm{padding:4px 10px;font-size:12px}.tag-btn{flex:1;padding:8px 12px;border-radius:var(--radius);border:1px solid var(--border-strong);background:var(--bg);color:var(--text-2);font-size:13px;font-weight:500;transition:all .15s ease;text-align:center}.tag-btn:hover{border-color:var(--primary);color:var(--primary)}.tag-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.input,.textarea{width:100%;padding:10px 12px;border:1px solid var(--border-strong);border-radius:var(--radius);background:var(--bg);transition:border-color .15s ease,box-shadow .15s ease}.input:focus,.textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px #1677ff1a}.textarea{resize:none;line-height:1.6}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#d9d9d9;border-radius:3px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideInRight{0%{transform:translate(100%)}to{transform:translate(0)}}@keyframes slideInLeft{0%{transform:translate(-100%)}to{transform:translate(0)}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes saveTipFade{0%{opacity:0;transform:translate(-50%,-10px)}15%{opacity:1;transform:translate(-50%)}85%{opacity:1;transform:translate(-50%)}to{opacity:0;transform:translate(-50%,-10px)}}.app{display:flex;flex-direction:column;height:100vh;height:100dvh;width:100%;background:var(--bg);overflow:hidden}.main-content,.mobile-main{flex:1;overflow-y:auto;overflow-x:hidden;background:var(--bg)}.library-page,.stats-page,.notes-page,.settings-page,.edit-page{min-height:100%;padding:16px 14px}.edit-page{padding-bottom:72px}.library-title,.stats-title,.notes-title,.settings-title{font-size:20px;font-weight:600;color:var(--text-1);margin:0}.mobile-header{height:var(--header-height);flex-shrink:0;display:flex;align-items:center;gap:8px;padding:0 10px;padding-top:env(safe-area-inset-top,0);border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:100}.mh-icon-btn{width:40px;height:40px;flex-shrink:0;display:flex;align-items:center;justify-content:center;border-radius:10px;color:var(--text-1);transition:background .15s ease}.mh-icon-btn:active{background:var(--bg-hover)}.mh-upload{margin-left:auto;color:var(--primary);background:var(--primary-bg)}.mh-upload:active{background:var(--primary);color:#fff}.mobile-logo{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:600;color:var(--text-1);cursor:pointer}.mobile-logo svg{width:26px;height:26px;flex-shrink:0}.mobile-header-actions{margin-left:auto;display:flex;align-items:center;gap:4px}.mobile-upload-btn{display:inline-flex;align-items:center;gap:4px;padding:7px 14px;background:var(--primary);color:#fff;border-radius:var(--radius);font-size:13px;font-weight:500}.mobile-upload-btn:active{background:var(--primary-active)}.mobile-drawer-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:300;animation:fadeIn .2s ease}.mobile-drawer{position:absolute;left:0;top:0;bottom:0;width:300px;max-width:82vw;background:var(--bg);display:flex;flex-direction:column;animation:slideInLeft .25s ease}.mobile-drawer-header{display:flex;align-items:center;justify-content:space-between;padding:16px;padding-top:calc(16px + env(safe-area-inset-top,0));border-bottom:1px solid var(--border)}.mobile-drawer-brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--text-1)}.mobile-drawer-brand svg{width:28px;height:28px}.mobile-drawer-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;color:var(--text-3);border-radius:50%}.mobile-drawer-close:active{background:var(--bg-hover)}.mobile-drawer-search{display:flex;align-items:center;gap:8px;margin:12px 16px;padding:8px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-subtle);color:var(--text-3)}.mobile-drawer-search input{flex:1;border:none;background:transparent;font-size:14px;color:var(--text-1)}.mobile-drawer-nav{display:flex;flex-direction:column;gap:4px;padding:0 12px}.mobile-drawer-link{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:var(--radius);color:var(--text-2);font-size:15px;font-weight:500;position:relative;transition:all .15s ease}.mobile-drawer-link:active{background:var(--bg-hover)}.mobile-drawer-link.active{color:var(--primary);font-weight:600}.mobile-drawer-link.active:before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:22px;background:var(--primary);border-radius:0 2px 2px 0}.mobile-drawer-icon{display:flex;align-items:center;justify-content:center}.mobile-drawer-divider{height:1px;background:var(--border);margin:8px 16px}.mobile-drawer-cats{flex:1;overflow-y:auto;padding:0 16px 16px}.mobile-drawer-cats-title{font-size:12px;color:var(--text-3);margin-bottom:8px;font-weight:500}.mobile-drawer-empty-cat{text-align:center;color:var(--text-3);font-size:13px;padding:16px}.category-tree{display:flex;flex-direction:column;gap:2px}.ct-empty{font-size:13px;color:var(--text-3);text-align:center;padding:16px;background:var(--bg-subtle);border-radius:var(--radius)}.ct-group{display:flex;flex-direction:column}.ct-parent,.ct-child{display:flex;align-items:center;gap:8px;padding:10px 8px;border-radius:var(--radius);cursor:pointer;transition:background .15s ease;-webkit-user-select:none;user-select:none}.ct-parent:hover,.ct-child:hover{background:var(--bg-hover)}.ct-parent.active,.ct-child.active{background:var(--primary-bg)}.ct-child{padding-left:36px}.ct-expand{width:26px;height:26px;flex-shrink:0;display:flex;align-items:center;justify-content:center;color:var(--text-3);border-radius:50%}.ct-expand:active{background:var(--border)}.ct-dot{width:11px;height:11px;border-radius:50%;flex-shrink:0}.ct-dot.small{width:9px;height:9px}.ct-name{flex:1;font-size:14px;color:var(--text-1);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.ct-count{font-size:11px;color:var(--text-3);background:var(--bg-hover);padding:2px 8px;border-radius:10px;flex-shrink:0}.ct-add-sub{font-size:11px;color:var(--primary);background:var(--primary-bg);padding:3px 8px;border-radius:10px;flex-shrink:0}.ct-add-sub:active{background:var(--primary);color:#fff}.ct-children{display:flex;flex-direction:column;padding-left:4px}.ct-no-child{font-size:11px;color:var(--text-4);padding:4px 0 4px 36px}.ct-add-input{display:flex;gap:6px;align-items:center;padding:8px 8px 8px 36px}.ct-add-input .input{flex:1}.ct-add-root{display:inline-flex;align-items:center;gap:4px;padding:8px 14px;margin-top:8px;border-radius:16px;border:1px dashed var(--primary);background:var(--primary-bg);color:var(--primary);font-size:13px;font-weight:500;align-self:flex-start}.ct-add-root:active{background:var(--primary);color:#fff}.ct-error{font-size:12px;color:var(--danger);padding:6px 10px;background:#fff1f0;border-radius:var(--radius);margin-top:8px}.category-tree-group{display:flex;flex-direction:column}.category-tree-parent,.category-tree-child{display:flex;align-items:center;gap:8px;padding:9px 8px;border-radius:var(--radius);cursor:pointer;transition:all .15s 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ease;padding:16px}.crop-modal{background:var(--bg);border-radius:var(--radius-lg);width:100%;max-width:720px;max-height:90vh;display:flex;flex-direction:column;overflow:hidden}.crop-modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border)}.crop-modal-header h3{margin:0;font-size:16px;font-weight:600}.crop-close-btn{font-size:24px;color:var(--text-3);width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center}.crop-close-btn:hover{background:var(--bg-hover)}.crop-modal-body{flex:1;overflow:hidden;padding:12px;display:flex;flex-direction:column}.crop-tip{font-size:12px;color:var(--text-3);margin:0 0 10px;text-align:center}.crop-scroll{flex:1;overflow:auto;background:var(--bg-subtle);border-radius:var(--radius);position:relative;-webkit-overflow-scrolling:touch;touch-action:pan-x pan-y}.crop-img-wrap{position:relative;display:inline-block;touch-action:none;-webkit-user-select:none;user-select:none}.crop-canvas{position:relative;display:inline-block;max-width:100%;background:var(--bg-subtle);border-radius:var(--radius);overflow:hidden;touch-action:none;-webkit-user-select:none;user-select:none}.crop-canvas img.crop-img,.crop-img{display:block;max-width:100%;max-height:60vh;-webkit-user-select:none;user-select:none;pointer-events:none}.crop-scroll .crop-img{max-height:none}.crop-mask{position:absolute;background:#0000008c;pointer-events:none;z-index:5}.crop-frame{position:absolute;border:2px solid var(--primary);pointer-events:auto;cursor:move;z-index:10;box-sizing:border-box}.crop-grid-h,.crop-grid-v{position:absolute;background:#fff6;pointer-events:none}.crop-grid-h{left:0;right:0;height:1px}.crop-grid-v{top:0;bottom:0;width:1px}.crop-handle{position:absolute;width:22px;height:22px;background:#fff;border:2px solid var(--primary);border-radius:50%;z-index:11;box-shadow:0 1px 4px #0003}.crop-handle:before{content:"";position:absolute;top:-8px;right:-8px;bottom:-8px;left:-8px}.h-nw{top:-11px;left:-11px;cursor:nwse-resize}.h-n{top:-11px;left:50%;transform:translate(-50%);cursor:ns-resize}.h-ne{top:-11px;right:-11px;cursor:nesw-resize}.h-e{top:50%;right:-11px;transform:translateY(-50%);cursor:ew-resize}.h-se{bottom:-11px;right:-11px;cursor:nwse-resize}.h-s{bottom:-11px;left:50%;transform:translate(-50%);cursor:ns-resize}.h-sw{bottom:-11px;left:-11px;cursor:nesw-resize}.h-w{top:50%;left:-11px;transform:translateY(-50%);cursor:ew-resize}.crop-edge{position:absolute;z-index:10;background:var(--primary);pointer-events:auto}.crop-edge-top,.crop-edge-bottom{height:6px;cursor:ns-resize}.crop-edge-left,.crop-edge-right{width:6px;cursor:ew-resize}.crop-modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:12px 18px;border-top:1px solid var(--border)}.upload-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:900;display:flex;align-items:flex-end;justify-content:center;animation:fadeIn .2s ease}.upload-modal{background:var(--bg);border-radius:var(--radius-lg) var(--radius-lg) 0 0;width:100%;max-width:100%;max-height:92vh;display:flex;flex-direction:column;overflow:hidden;animation:slideUp .25s ease}.upload-modal-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border);flex-shrink:0}.upload-modal-header h3{margin:0;font-size:16px;font-weight:600}.upload-close-btn{font-size:24px;color:var(--text-3);width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center}.upload-modal-body{flex:1;overflow-y:auto;padding:18px;-webkit-overflow-scrolling:touch}.upload-error{background:#fff1f0;color:var(--danger);padding:8px 12px;border-radius:var(--radius);font-size:13px;margin-bottom:12px}.upload-section{margin-bottom:20px}.upload-section-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:10px}.upload-dropzone{border:2px dashed var(--border-strong);border-radius:var(--radius);padding:32px 16px;text-align:center;cursor:pointer;transition:all .15s ease;background:var(--bg-subtle)}.upload-dropzone:hover{border-color:var(--primary);background:var(--primary-bg)}.upload-dropzone-text{font-size:14px;color:var(--text-2);margin-top:8px;font-weight:500}.upload-dropzone-hint{font-size:12px;color:var(--text-3);margin-top:4px}.upload-preview{position:relative}.upload-preview-img{width:100%;max-height:320px;object-fit:contain;border-radius:var(--radius);background:var(--bg-subtle);display:block}.upload-preview-actions{display:flex;gap:8px;margin-top:8px;justify-content:center}.upload-empty-cat{font-size:13px;color:var(--text-3);text-align:center;padding:12px;background:var(--bg-subtle);border-radius:var(--radius)}.upload-add-cat-btn{display:inline-flex;align-items:center;gap:4px;padding:6px 12px;border-radius:16px;border:1px dashed var(--primary);background:var(--primary-bg);color:var(--primary);font-size:13px;font-weight:500;margin-top:8px}.upload-add-cat-btn:hover{background:var(--primary);color:#fff}.upload-option-row{display:flex;gap:8px}.upload-option-btn{flex:1;padding:10px;border-radius:var(--radius);border:1px solid var(--border-strong);background:var(--bg);color:var(--text-2);font-size:15px;font-weight:600;transition:all .15s ease}.upload-option-btn:hover{border-color:var(--primary);color:var(--primary)}.upload-option-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.upload-tag-row{display:flex;gap:8px;flex-wrap:wrap}.upload-tag-row .tag-btn{min-width:72px}.upload-remark{font-size:14px}.upload-modal-footer{display:flex;justify-content:flex-end;gap:8px;padding:12px 18px calc(12px + var(--safe-bottom));border-top:1px solid var(--border);background:var(--bg)}.upload-modal-footer-fixed{flex-shrink:0;display:flex;gap:10px;padding:12px 16px calc(12px + var(--safe-bottom));border-top:1px solid var(--border);background:var(--bg);position:sticky;bottom:0;left:0;right:0;z-index:20}.upload-footer-back{flex:1;padding:12px 0;font-size:15px}.upload-footer-save{flex:2;padding:12px 0;font-size:15px;font-weight:600}.filter-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:950;animation:fadeIn .2s ease}.filter-drawer{position:absolute;right:0;top:0;bottom:0;width:320px;max-width:85vw;background:var(--bg);display:flex;flex-direction:column;animation:slideInRight .25s ease}.filter-header{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--border)}.filter-header h3{margin:0;font-size:16px;font-weight:600}.filter-close{font-size:24px;color:var(--text-3);width:32px;height:32px;border-radius:50%}.filter-close:hover{background:var(--bg-hover)}.filter-body{flex:1;overflow-y:auto;padding:12px}.filter-section{margin-bottom:16px}.filter-section-title{font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:8px}.filter-empty{text-align:center;color:var(--text-3);font-size:13px;padding:16px}.filter-tag-row{display:flex;flex-wrap:wrap;gap:8px}.filter-tag{padding:6px 12px;border-radius:16px;border:1px solid var(--border-strong);background:var(--bg);color:var(--text-2);font-size:13px;transition:all .15s ease}.filter-tag:hover{border-color:var(--primary);color:var(--primary)}.filter-tag.active{background:var(--primary);border-color:var(--primary);color:#fff}.filter-footer{display:flex;gap:8px;padding:12px 18px calc(12px + var(--safe-bottom));border-top:1px solid var(--border);background:var(--bg)}.filter-footer .btn{flex:1}.category-add-row{display:flex;gap:8px;margin-bottom:16px}.category-add-row .input{flex:1}.category-error{color:var(--danger);font-size:13px;margin-bottom:12px;padding:8px 12px;background:#fff1f0;border-radius:var(--radius)}.category-empty{text-align:center;padding:24px;color:var(--text-3);font-size:13px;background:var(--bg-subtle);border-radius:var(--radius)}.category-tree-list{display:flex;flex-direction:column;gap:10px}.category-tree-node{border:1px solid var(--border);border-radius:var(--radius);padding:10px;background:var(--bg)}.category-tree-row{display:flex;align-items:center;gap:8px}.category-tree-row.child{padding-left:20px;margin-top:6px}.category-tree-row .category-tree-dot{width:12px;height:12px}.category-tree-row .category-tree-name{flex:1;font-size:14px;font-weight:500;color:var(--text-1);cursor:pointer}.category-tree-row .category-tree-count{font-size:11px;color:var(--text-3);background:var(--bg-hover);padding:2px 8px;border-radius:10px}.category-tree-actions{display:flex;gap:2px;flex-wrap:wrap}.category-add-sub{display:flex;gap:6px;margin-top:8px;padding-left:24px}.category-add-sub .input{flex:1}.edit-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.edit-header h2{margin:0;font-size:18px;font-weight:600}.edit-body{padding-bottom:16px}.edit-section{margin-bottom:18px}.edit-image-section{text-align:center}.edit-image-wrap{position:relative;display:inline-block;max-width:100%;cursor:pointer;border-radius:var(--radius);overflow:hidden;background:var(--bg-subtle)}.edit-image{display:block;max-width:100%;max-height:420px;object-fit:contain}.edit-image-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to top,rgba(0,0,0,.5),transparent 60%);display:flex;align-items:flex-end;justify-content:center;padding-bottom:12px;opacity:0;transition:opacity .15s ease;color:#fff;font-size:12px}.edit-image-wrap:hover .edit-image-overlay,.edit-image-wrap:active .edit-image-overlay{opacity:1}.edit-image-actions{display:flex;gap:8px;justify-content:center;margin-top:8px}.edit-section-title{font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:8px}.edit-option-row{display:flex;gap:8px}.edit-option-btn{flex:1;padding:10px;border-radius:var(--radius);border:1px solid var(--border-strong);background:var(--bg);color:var(--text-2);font-size:15px;font-weight:600;transition:all .15s ease}.edit-option-btn:hover{border-color:var(--primary);color:var(--primary)}.edit-option-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.edit-tag-row{display:flex;gap:8px;flex-wrap:wrap}.edit-tag-row .tag-btn{min-width:72px}.edit-empty-cat{font-size:13px;color:var(--text-3);padding:12px;background:var(--bg-subtle);border-radius:var(--radius)}.edit-category-tree{border:1px solid var(--border);border-radius:var(--radius);padding:8px;background:var(--bg)}.edit-remark-wrap{position:relative}.edit-remark{font-size:14px;padding-right:40px}.edit-keyboard-dismiss{position:absolute;right:8px;bottom:8px;width:30px;height:30px;border-radius:6px;background:var(--bg-hover);color:var(--text-3);display:flex;align-items:center;justify-content:center;transition:all .15s ease}.edit-keyboard-dismiss:hover{background:var(--primary-bg);color:var(--primary)}.edit-save-bar{position:fixed;bottom:0;left:0;right:0;background:var(--bg);border-top:1px solid var(--border);padding:10px 14px calc(10px + var(--safe-bottom));z-index:50;display:flex;gap:8px}.edit-save-bar .btn{flex:1}.edit-save-bar .btn-primary{flex:2}.save-tip{position:fixed;top:80px;left:50%;transform:translate(-50%);background:#f6ffed;color:var(--success);border:1px solid #b7eb8f;padding:8px 16px;border-radius:20px;font-size:13px;font-weight:500;z-index:500;display:flex;align-items:center;gap:6px;animation:saveTipFade 1.5s ease forwards;pointer-events:none}.danger-zone{margin-top:24px;padding-top:16px;border-top:1px solid var(--border)}.edit-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:60vh;gap:16px}.library-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.library-title-row{display:flex;align-items:baseline;gap:8px}.library-count{font-size:13px;color:var(--text-3)}.filter-count-hint{color:var(--primary);font-weight:500}.library-search-wrap{display:flex;gap:8px;margin-bottom:14px}.library-search{flex:1;display:flex;align-items:center;gap:8px;padding:8px 14px;background:var(--bg-subtle);border-radius:var(--radius);border:1px solid var(--border);color:var(--text-3)}.library-search input{flex:1;border:none;background:transparent;font-size:14px;color:var(--text-1)}.library-search-clear{font-size:18px;color:var(--text-3);width:20px;height:20px;display:flex;align-items:center;justify-content:center}.filter-btn{position:relative}.filter-badge{position:absolute;top:-4px;right:-4px;background:var(--primary);color:#fff;font-size:10px;width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center}.library-active-filters{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:14px}.library-active-tag{display:inline-flex;align-items:center;gap:4px;background:var(--primary-bg);color:var(--primary);padding:4px 10px;border-radius:14px;font-size:12px;border:1px solid var(--primary-border)}.library-active-tag .tag-dot{width:8px;height:8px;border-radius:50%}.library-active-tag button{font-size:14px;color:var(--text-3);width:14px;height:14px;display:flex;align-items:center;justify-content:center}.library-active-tag button:hover{color:var(--danger)}.library-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center;gap:4px}.library-empty-icon{margin-bottom:8px}.library-empty-title{font-size:16px;font-weight:500;color:var(--text-2);margin-bottom:4px}.library-empty-hint{font-size:13px;color:var(--text-3);margin-bottom:16px}.library-list{display:flex;flex-direction:column;gap:12px}.question-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:12px;cursor:pointer;transition:all .2s ease}.question-card:hover{border-color:var(--primary-border);box-shadow:var(--shadow)}.question-card-main{display:flex;gap:12px}.question-card-thumb{width:88px;height:88px;flex-shrink:0;border-radius:var(--radius);overflow:hidden;background:var(--bg-subtle);border:1px solid var(--border)}.question-card-thumb img{width:100%;height:100%;object-fit:cover}.question-card-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}.question-card-meta{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.q-answer{font-size:12px;font-weight:600;color:#fff;background:var(--primary);padding:2px 8px;border-radius:10px}.q-status,.q-difficulty{font-size:11px;padding:2px 8px;border-radius:10px;font-weight:500}.q-time{font-size:11px;color:var(--text-3);margin-left:auto}.question-card-title{font-size:14px;color:var(--text-1);line-height:1.5;font-weight:500;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.question-card-cats{display:flex;flex-wrap:wrap;gap:4px}.q-cat{display:inline-flex;align-items:center;gap:4px;font-size:11px;padding:2px 8px;border-radius:10px;font-weight:500}.q-cat-dot{width:6px;height:6px;border-radius:50%}.stats-header{margin-bottom:20px}.stats-body{display:flex;flex-direction:column;gap:24px}.stats-overview{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.overview-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px 8px;text-align:center}.overview-total{background:var(--primary);border-color:var(--primary)}.overview-total .overview-num,.overview-total .overview-label{color:#fff}.overview-num{font-size:24px;font-weight:700;color:var(--text-1);line-height:1.2}.overview-label{font-size:11px;color:var(--text-3);margin-top:4px}.stats-progress-section{display:grid;grid-template-columns:1fr 1fr;gap:14px}.progress-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px;text-align:center}.progress-card h3{margin:0 0 12px;font-size:14px;color:var(--text-2)}.progress-ring-wrap{position:relative;display:inline-block}.progress-ring-text{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center}.progress-ring-num{font-size:20px;font-weight:700;color:var(--text-1)}.progress-ring-label{font-size:11px;color:var(--text-3)}.stats-section-title{font-size:15px;font-weight:600;color:var(--text-1);margin:0 0 12px}.stats-diff-bars,.stats-cat-list{display:flex;flex-direction:column;gap:12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px}.stats-cat-item{display:flex;flex-direction:column;gap:6px}.stats-cat-info{display:flex;justify-content:space-between;align-items:baseline}.stats-cat-name{font-size:14px;font-weight:500}.stats-cat-total{font-size:12px;color:var(--text-3)}.stats-cat-bar{height:8px;background:var(--bg-hover);border-radius:4px;overflow:hidden}.stats-cat-bar-fill{height:100%;border-radius:4px;transition:width .6s ease}.stats-cat-detail{display:flex;gap:10px;font-size:11px}.stats-no-cat{text-align:center;padding:20px;color:var(--text-3);font-size:13px;background:var(--bg-subtle);border-radius:var(--radius)}.stats-empty{display:flex;flex-direction:column;align-items:center;padding:48px 24px;text-align:center;gap:4px}.stats-empty-icon{margin-bottom:8px}.stats-empty-title{font-size:16px;font-weight:500;color:var(--text-2)}.stats-empty-hint{font-size:13px;color:var(--text-3)}.notes-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.notes-actions{display:flex;gap:8px}.notes-filter-bar{display:flex;flex-direction:column;gap:10px;margin-bottom:16px}.notes-filter-bar .input{background:var(--bg-subtle);border-color:var(--border)}.notes-filter-chips{border:1px solid var(--border);border-radius:var(--radius);padding:8px;background:var(--bg)}.notes-empty{display:flex;flex-direction:column;align-items:center;padding:48px 24px;text-align:center;gap:4px}.notes-empty-icon{margin-bottom:8px}.notes-empty-title{font-size:16px;font-weight:500;color:var(--text-2);margin-bottom:4px}.notes-empty-hint{font-size:13px;color:var(--text-3);margin-bottom:16px}.notes-list{display:flex;flex-direction:column;gap:14px}.note-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:14px}.note-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.note-card-title{margin:0;font-size:15px;font-weight:600;color:var(--text-1)}.note-card-actions{display:flex;gap:2px}.note-card-cats{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:8px}.note-cat{font-size:11px;color:var(--text-2);background:var(--bg-hover);padding:2px 8px;border-radius:8px}.note-card-content{font-size:13px;color:var(--text-2);line-height:1.7;white-space:pre-wrap;margin-bottom:8px}.note-card-images{display:flex;flex-wrap:wrap;gap:8px}.note-card-img{width:100px;height:100px;object-fit:cover;border-radius:var(--radius);border:1px solid var(--border)}.note-editor-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:900;display:flex;align-items:center;justify-content:center;animation:fadeIn .2s ease;padding:16px}.note-editor{background:var(--bg);border-radius:var(--radius-lg);width:100%;max-width:640px;max-height:92vh;display:flex;flex-direction:column;overflow:hidden}.note-editor-header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border)}.note-editor-header h3{margin:0;font-size:16px;font-weight:600}.note-editor-close{font-size:24px;color:var(--text-3);width:32px;height:32px;border-radius:50%}.note-editor-close:hover{background:var(--bg-hover)}.note-editor-body{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:12px}.note-editor-images{display:flex;flex-wrap:wrap;gap:8px}.note-editor-img{position:relative;width:100px;height:100px}.note-editor-img img{width:100%;height:100%;object-fit:cover;border-radius:var(--radius);border:1px solid var(--border)}.note-editor-img button{position:absolute;top:-6px;right:-6px;width:20px;height:20px;border-radius:50%;background:var(--danger);color:#fff;font-size:14px;display:flex;align-items:center;justify-content:center}.note-editor-add-img{width:100px;height:100px;border:1px dashed var(--border-strong);border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;color:var(--text-3);font-size:12px;transition:all .15s ease}.note-editor-add-img:hover{border-color:var(--primary);color:var(--primary)}.note-editor-cats{border-top:1px solid var(--border);padding-top:12px}.note-editor-label{font-size:13px;font-weight:600;color:var(--text-2);margin-bottom:8px}.note-editor-footer{display:flex;justify-content:flex-end;gap:8px;padding:12px 18px;border-top:1px solid var(--border)}.settings-header{margin-bottom:16px}.settings-body{display:flex;flex-direction:column;gap:24px}.settings-section{background:var(--bg)}.settings-section-title{font-size:15px;font-weight:600;color:var(--text-1);margin:0 0 8px}.settings-section-desc{font-size:12px;color:var(--text-3);margin:0 0 14px;line-height:1.6}.settings-data-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:14px}.data-stat-item{background:var(--bg-subtle);border-radius:var(--radius);padding:12px;text-align:center}.data-stat-label{display:block;font-size:11px;color:var(--text-3);margin-bottom:4px}.data-stat-value{font-size:18px;font-weight:600;color:var(--text-1)}.settings-data-actions{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.settings-msg{font-size:13px;color:var(--success);padding:6px 12px;background:#f6ffed;border-radius:var(--radius);margin-bottom:12px}.settings-danger-zone{margin-top:16px;padding-top:14px;border-top:1px solid var(--border)}.settings-danger-zone h3{font-size:13px;color:var(--danger);margin:0 0 8px}.settings-about{font-size:13px;color:var(--text-2);line-height:1.8}.settings-about p{margin:4px 0}.settings-tip{color:var(--warning);margin-top:12px!important}@media (max-width: 767px){.mobile-main{-webkit-overflow-scrolling:touch}.library-page,.stats-page,.notes-page,.settings-page,.edit-page{padding:14px 12px calc(14px + var(--bottom-bar-height) + var(--safe-bottom))}.library-header{margin-bottom:12px}.library-title{font-size:18px}.library-count{font-size:12px}.library-search-wrap{gap:6px}.library-search input{font-size:13px}.filter-btn{padding:7px 10px;font-size:13px}.library-active-filters{padding:8px;margin-bottom:10px}.library-active-tag{padding:3px 8px;font-size:11px}.question-card{padding:10px}.question-card-thumb{width:76px;height:76px}.question-card-title{font-size:13px;-webkit-line-clamp:2}.q-time{display:none}.q-cat{font-size:10px}.stats-overview{grid-template-columns:repeat(2,1fr)}.stats-progress-section{grid-template-columns:1fr}.overview-card{padding:12px 4px}.overview-num{font-size:22px}.overview-label{font-size:10px}.upload-modal{max-height:90vh;border-radius:var(--radius-lg) var(--radius-lg) 0 0}.upload-modal-header{padding:12px 16px}.upload-modal-body{padding:14px 16px}.upload-modal-footer{padding:10px 16px calc(10px + var(--safe-bottom))}.filter-drawer{width:100%;max-width:100%;border-radius:var(--radius-lg) 0 0 var(--radius-lg)}.mobile-drawer{width:280px;max-width:80vw}.mobile-drawer-nav{padding:0 12px}.mobile-drawer-link{padding:10px 12px;font-size:14px}.edit-image{max-height:340px}.edit-save-bar{padding:8px 12px;bottom:var(--bottom-bar-height)}.edit-save-bar .btn{font-size:14px;padding:8px 12px}.category-tree-row .category-tree-actions{display:none}.category-tree-row .category-tree-count{font-size:10px}.category-tree-actions{flex-wrap:wrap}.category-tree-row .btn-sm{font-size:10px;padding:2px 6px}.category-tree-row .category-tree-name{font-size:13px}.btn{min-height:36px}}@media (max-width: 380px){.mobile-logo span{display:none}.question-card-thumb{width:64px;height:64px}.question-card-title{font-size:12px}.library-search-wrap{flex-wrap:wrap}.library-search,.filter-btn{width:100%}.stats-overview{grid-template-columns:repeat(2,1fr)}.q-answer{padding:1px 6px;font-size:11px}.q-status,.q-difficulty{padding:1px 6px;font-size:10px}}@media (min-width: 768px){.app{max-width:520px;margin:0 auto;box-shadow:0 0 24px #00000014}.mobile-header,.bottom-bar{max-width:520px;left:50%;transform:translate(-50%)}.main-content,.mobile-main{background:var(--bg)}}.bottom-bar{padding-bottom:max(8px,var(--safe-bottom));height:calc(56px + var(--safe-bottom))}.edit-save-bar{bottom:calc(56px + var(--safe-bottom))}.library-page,.stats-page,.notes-page,.settings-page,.edit-page{padding-bottom:calc(14px + 56px + var(--safe-bottom))}