:root{--font-ui: ui-monospace, SFMono-Regular, "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, "PingFang SC", "Microsoft YaHei", sans-serif;--font-sans: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;color-scheme:light;--bg: #f4f3ef;--surface: #ffffff;--surface-sunken: #f0efea;--surface-hover: #eae8e1;--border: #e2dfd6;--border-strong: #d1cdc1;--text: #35342f;--text-strong: #17170f;--text-muted: #6b6a63;--text-faint: #96948b;--accent: #0b6b83;--accent-soft: #e7f4f7;--accent-border: #9dcfda;--primary: #17170f;--primary-text: #f4f3ef;--primary-hover: #2e2d24;--success: #14724a;--success-soft: #eaf6ef;--success-border: #b9dfc8;--danger: #a8332c;--danger-soft: #fdf0ee;--danger-border: #f0c7c2;--warn: #8a5a07;--output-bg: #f0efea;--output-text: #33322c;--output-border: #dcd8cd;--ring: rgba(11, 107, 131, .3);--led-glow: rgba(20, 114, 74, .5);--shadow-pop: 0 20px 50px rgba(20, 20, 15, .22);--radius: 4px;--radius-sm: 3px}:root[data-theme=dark]{color-scheme:dark;--bg: #0b0b0c;--surface: #141416;--surface-sunken: #101012;--surface-hover: #1d1d20;--border: #26262a;--border-strong: #36363b;--text: #c4c4bf;--text-strong: #f0f0ea;--text-muted: #8b8b85;--text-faint: #67675f;--accent: #4fd1e6;--accent-soft: #0f2b31;--accent-border: #1f5f6d;--primary: #f0f0ea;--primary-text: #141416;--primary-hover: #ffffff;--success: #4bc98c;--success-soft: #0e2418;--success-border: #1e4d35;--danger: #ff8f85;--danger-soft: #28130f;--danger-border: #552824;--warn: #d9a63f;--output-bg: #08080a;--output-text: #a8a8a2;--output-border: #212125;--ring: rgba(79, 209, 230, .34);--led-glow: rgba(75, 201, 140, .55);--shadow-pop: 0 20px 50px rgba(0, 0, 0, .7)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;min-width:320px;background:var(--bg);color:var(--text);font-family:var(--font-sans);font-size:13.5px;line-height:1.6;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}h1,h2,h3,p{margin:0}button,input,textarea,select{font:inherit;color:inherit}button{cursor:pointer}a{color:var(--accent)}:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.mono{font-family:var(--font-mono)}.app-shell{display:flex;min-height:100vh}.sidebar{position:sticky;top:0;display:flex;flex-direction:column;gap:12px;flex:0 0 240px;width:240px;height:100vh;padding:14px 10px;overflow-y:auto;border-right:1px solid var(--border);background:var(--surface)}.sidebar-brand{display:flex;align-items:center;gap:9px;padding:2px 6px 8px}.brand-mark{display:grid;place-items:center;flex:0 0 auto;width:32px;height:32px;border-radius:4px;background:var(--primary);color:var(--primary-text)}.brand-mark svg{display:block;width:21px;height:21px}.sidebar-brand strong{display:block;color:var(--text-strong);font-family:var(--font-ui);font-size:12.5px;font-weight:600;letter-spacing:-.2px}.sidebar-brand span{display:block;margin-top:2px;color:var(--text-faint);font-family:var(--font-ui);font-size:10.5px;letter-spacing:.02em}.tool-nav{display:flex;flex-direction:column;flex:1}.nav-group-label{margin:16px 8px 4px;color:var(--text-faint);font-family:var(--font-ui);font-size:10.5px;font-weight:600;letter-spacing:.12em;text-transform:uppercase}.nav-item{position:relative;display:flex;align-items:center;gap:9px;width:100%;padding:5px 8px 5px 10px;border:0;border-left:2px solid transparent;border-radius:0 var(--radius-sm) var(--radius-sm) 0;background:transparent;color:var(--text-muted);font-family:var(--font-ui);font-size:12.5px;text-align:left;transition:background-color .12s,color .12s,border-color .12s}.nav-item:hover{background:var(--surface-hover);color:var(--text-strong)}.nav-item.active{border-left-color:var(--accent);background:var(--surface-sunken);color:var(--text-strong);font-weight:600}.nav-glyph{display:grid;place-items:center;flex:0 0 auto;width:22px;height:22px;border-radius:2px;color:var(--text-faint);font:600 9.5px/1 var(--font-mono);letter-spacing:-.3px}.nav-item.active .nav-glyph{color:var(--accent)}.nav-label{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-footer{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 6px 0;border-top:1px solid var(--border)}.local-badge{display:inline-flex;align-items:center;gap:5px;border:1px solid var(--success-border);border-radius:2px;padding:2px 7px;background:var(--success-soft);color:var(--success);font-family:var(--font-ui);font-size:10.5px;letter-spacing:.04em;white-space:nowrap}.local-badge:before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor}.theme-toggle{display:inline-flex;align-items:center;gap:5px;min-height:26px;padding:0 8px;border:1px solid var(--border-strong);border-radius:2px;background:transparent;color:var(--text-muted);font-family:var(--font-ui);font-size:11px}.theme-toggle:hover{border-color:var(--accent-border);color:var(--accent)}.sidebar-backdrop{display:none}.app-main{display:flex;flex-direction:column;flex:1;min-width:0}.mobile-bar{display:none;align-items:center;gap:10px;padding:9px 14px;border-bottom:1px solid var(--border);background:var(--surface)}.mobile-bar strong{color:var(--text-strong);font-family:var(--font-ui);font-size:12.5px;font-weight:600}.mobile-menu{display:grid;place-items:center;width:30px;height:30px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:transparent;color:var(--text-muted);font-size:14px}.main-content{flex:1;width:100%;max-width:2200px;margin:0 auto;padding:16px clamp(16px,1.8vw,36px) 36px}.tool-toolbar{display:flex;align-items:center;justify-content:flex-end;gap:12px;margin-bottom:8px}.tool-actions{display:flex;gap:6px}.tool-panel{padding:22px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}.tool-content{width:100%}.narrow-tool{max-width:760px}.tool-heading{margin-bottom:16px}.tool-heading h2{color:var(--text-strong);font-family:var(--font-ui);font-size:18px;font-weight:600;letter-spacing:-.4px}.tool-heading p{margin-top:5px;color:var(--text-muted);font-size:12.5px;line-height:1.7}.button{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:30px;padding:0 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font-family:var(--font-ui);font-size:12.5px;font-weight:600;letter-spacing:.01em;white-space:nowrap;transition:border-color .12s,background-color .12s,color .12s}.button:hover{border-color:var(--accent-border);color:var(--accent);background:var(--surface-hover)}.button:disabled{opacity:.45;cursor:not-allowed}.button:disabled:hover{border-color:var(--border-strong);color:var(--text);background:var(--surface)}.button-primary{border-color:var(--primary);background:var(--primary);color:var(--primary-text)}.button-primary:hover{border-color:var(--primary-hover);background:var(--primary-hover);color:var(--primary-text)}.ghost{min-height:26px;padding:0 9px;border-color:transparent;background:transparent;color:var(--text-muted);font-size:11px;font-weight:500}.ghost:hover{border-color:var(--border-strong);background:var(--surface-hover);color:var(--text-strong)}.action-row{display:flex;align-items:center;gap:6px;margin-bottom:14px}.action-wrap{flex-wrap:wrap}.spaced-top{margin-top:14px}.input-action-row{display:flex;gap:6px;margin:6px 0 14px}.input-action-row .text-input{margin:0}.input-action-row .button{flex:0 0 auto}.field-label{display:block;color:var(--text-faint);font-family:var(--font-ui);font-size:11.5px;font-weight:600;letter-spacing:.03em;text-transform:uppercase}.field-label .text-input,.field-label .code-area{margin-top:5px}.text-input{width:100%;height:32px;padding:0 10px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--text-strong);font-family:var(--font-mono);font-size:12.5px;transition:border-color .12s,box-shadow .12s}.text-input::placeholder{color:var(--text-faint);font-family:var(--font-sans)}.text-input:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--ring);outline:none}.code-area{width:100%;min-height:280px;margin-top:5px;padding:11px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--text-strong);font:12.5px/1.75 var(--font-mono);resize:vertical;transition:border-color .12s,box-shadow .12s}.code-area::placeholder{color:var(--text-faint);font-family:var(--font-sans)}.code-area:focus{border-color:var(--accent);box-shadow:0 0 0 2px var(--ring);outline:none}.editor-grid .code-area{min-height:clamp(300px,46vh,620px)}.compact-area{min-height:156px;margin-bottom:14px}.code-area[readonly],.readonly-input{border-color:var(--output-border);background:var(--output-bg);color:var(--output-text);cursor:default}.code-area[readonly]:focus,.readonly-input:focus{border-color:var(--output-border);box-shadow:none}.select-input{-webkit-appearance:auto;-moz-appearance:auto;appearance:auto;padding-right:4px;font-family:var(--font-ui)}.editor-grid,.timestamp-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.single-form{max-width:800px}.message{margin:-4px 0 12px;padding:8px 10px;border-radius:var(--radius-sm);font-size:12px;line-height:1.65}.message-error{border:1px solid var(--danger-border);background:var(--danger-soft);color:var(--danger)}.error-snippet{margin:-6px 0 12px;padding:8px 10px;overflow-x:auto;border:1px solid var(--danger-border);border-radius:var(--radius-sm);background:var(--danger-soft);color:var(--danger);font:11.5px/1.7 var(--font-mono);white-space:pre}.count-pill{margin-left:auto;border:1px solid var(--border);border-radius:2px;padding:3px 8px;background:var(--surface-sunken);color:var(--text-muted);font-family:var(--font-ui);font-size:11px;white-space:nowrap}.hint-line{margin:-6px 0 12px;color:var(--text-faint);font-size:11px;line-height:1.75}.guide-note{display:inline-flex;align-items:center;gap:5px;color:var(--text-faint);font-family:var(--font-ui);font-size:10.5px}.guide-note>span{width:4px;height:4px;border-radius:50%;background:var(--success)}.copy-button{min-height:26px;padding:0 9px;font-size:11px}.copy-button.is-copied{border-color:var(--success-border);background:var(--success-soft);color:var(--success)}.result-pane{display:flex;flex-direction:column}.result-head{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:20px}.result-head .copy-button{min-height:20px;padding:0 6px;border-radius:2px;font-size:11px}.result-head+.text-input{margin-top:5px}.result-frame{position:relative;margin-top:5px}.result-frame .result-area{margin-top:0}.result-area-compact{min-height:156px}.editor-grid .result-area-compact{min-height:176px}.result-empty{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:0 18px;color:var(--text-faint);font-size:12px;text-align:center;pointer-events:none}.key-value-list{margin-top:8px;overflow:hidden;border:1px solid var(--border);border-radius:var(--radius-sm)}.key-value-row{display:grid;grid-template-columns:160px minmax(0,1fr);gap:12px;padding:7px 11px;border-bottom:1px solid var(--border);font-size:12px}.key-value-row:last-child{border-bottom:0}.key-value-row span{color:var(--text-faint);font-family:var(--font-ui);font-size:11px}.key-value-row code{overflow-wrap:anywhere;color:var(--text-strong);font-family:var(--font-mono);font-size:12px}.current-time-card{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:14px 0 12px;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-sunken)}.current-time-card h3{color:var(--text-strong);font-family:var(--font-ui);font-size:11.5px;font-weight:600;letter-spacing:.03em}.current-time-card p{margin-top:3px;color:var(--text-muted);font-size:11px}.headline-time{margin-top:5px;color:var(--text-strong);font-size:15px}.diff-table-wrap{margin-top:8px;overflow:auto;border:1px solid var(--border);border-radius:var(--radius-sm)}.diff-table{width:100%;min-width:700px;border-collapse:collapse;font-size:12px;text-align:left}.diff-table th,.diff-table td{padding:8px 11px;border-bottom:1px solid var(--border);vertical-align:top}.diff-table th{background:var(--surface-sunken);color:var(--text-faint);font-family:var(--font-ui);font-size:10.5px;font-weight:600;letter-spacing:.04em}.diff-table tr:last-child td{border-bottom:0}.diff-新增 td:nth-child(2){color:var(--success);font-weight:700}.diff-删除 td:nth-child(2){color:var(--danger);font-weight:700}.diff-变更 td:nth-child(2){color:var(--warn);font-weight:700}.regex-controls{display:grid;grid-template-columns:minmax(0,1fr) 100px auto;align-items:end;gap:8px;margin-bottom:14px}.regex-controls .button{margin-bottom:0}.match-results{margin-top:8px;padding:11px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface-sunken);color:var(--text);font-size:12px}.match-results ol{display:grid;gap:5px;margin:9px 0 0;padding-left:18px}.match-results li{display:flex;gap:10px;align-items:baseline}.match-results code{overflow-wrap:anywhere;color:var(--accent);font-family:var(--font-mono)}.match-results span{color:var(--text-faint);font-family:var(--font-ui);font-size:10.5px}.supplementary-content{margin-top:18px}.status-strip{position:sticky;bottom:0;z-index:40;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px;padding:7px 12px;border-top:1px solid var(--border);background:var(--surface-sunken);color:var(--text-faint);font-family:var(--font-ui);font-size:11px;letter-spacing:.05em}.status-strong{color:var(--text-muted);font-weight:600}.status-sep{color:var(--border-strong)}.status-key{border:1px solid var(--border-strong);border-radius:2px;padding:0 4px;color:var(--text-muted)}.status-led{width:5px;height:5px;border-radius:50%;background:var(--success);animation:led-pulse 2.6s ease-out infinite}@keyframes led-pulse{0%{box-shadow:0 0 0 0 var(--led-glow)}70%{box-shadow:0 0 0 5px transparent}to{box-shadow:0 0 0 0 transparent}}.site-footer{padding:10px 20px 48px;color:var(--text-faint);font-size:11px;line-height:1.7;text-align:center}.support-area{display:flex;justify-content:center;align-items:center;gap:6px;margin-top:8px}.support-link{color:var(--accent);font-weight:600;text-decoration:none}.support-link:hover{text-decoration:underline}.tool-guide{padding:18px 20px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}.tool-guide-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.tool-guide h2{color:var(--text-strong);font-family:var(--font-ui);font-size:14px;font-weight:600;letter-spacing:-.2px}.tool-guide-heading p{margin-top:5px;color:var(--text-muted);font-size:12px;line-height:1.7}.tool-guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}.tool-guide article{display:flex;align-items:flex-start;gap:10px;padding:13px;border:1px solid var(--border);border-radius:var(--radius-sm)}.guide-number{display:grid;place-items:center;flex:0 0 auto;width:24px;height:24px;border:1px solid var(--border);border-radius:2px;color:var(--text-faint);font:600 10px/1 var(--font-mono)}.tool-guide h3{color:var(--text-strong);font-family:var(--font-ui);font-size:11.5px;font-weight:600;line-height:1.5;letter-spacing:.01em}.tool-guide article p{margin-top:4px;color:var(--text-muted);font-size:11.5px;line-height:1.7}.palette-trigger{display:flex;align-items:center;justify-content:space-between;gap:8px;width:100%;min-height:30px;padding:0 9px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface-sunken);color:var(--text-faint);font-family:var(--font-ui);font-size:11px;text-align:left;transition:border-color .12s,color .12s}.palette-trigger:hover{border-color:var(--accent-border);color:var(--text-muted)}.palette-trigger kbd{border:1px solid var(--border-strong);border-radius:2px;padding:0 4px;background:var(--surface);color:var(--text-faint);font:9.5px/1.6 var(--font-mono)}.palette-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:80;display:flex;align-items:flex-start;justify-content:center;padding:12vh 20px 20px;background:#08080699}.palette-dialog{width:min(640px,100%);max-height:76vh;overflow:auto;padding:16px;border:1px solid var(--border-strong);border-radius:6px;background:var(--surface);box-shadow:var(--shadow-pop)}.palette-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.palette-header strong{color:var(--text-strong);font-family:var(--font-ui);font-size:12.5px;font-weight:600;letter-spacing:.03em}.palette-close{display:grid;place-items:center;width:24px;height:24px;border:0;border-radius:2px;background:var(--surface-sunken);color:var(--text-muted);font-size:15px;line-height:1}.palette-close:hover{background:var(--surface-hover);color:var(--text-strong)}.palette-input{min-height:108px;margin-top:0}.palette-detect{display:flex;align-items:center;flex-wrap:wrap;gap:7px;margin-top:11px;color:var(--text-muted);font-size:12px}.palette-badge{border:1px solid var(--accent-border);border-radius:2px;padding:2px 7px;background:var(--accent-soft);color:var(--accent);font-family:var(--font-ui);font-size:10.5px;font-weight:600}.palette-preview{margin-top:10px;padding:10px;border:1px solid var(--output-border);border-radius:var(--radius-sm);background:var(--output-bg)}.palette-preview strong{display:block;margin-bottom:5px;color:var(--text-faint);font-family:var(--font-ui);font-size:10.5px;letter-spacing:.05em}.palette-preview pre{margin:0;max-height:170px;overflow:auto;color:var(--output-text);font:11.5px/1.65 var(--font-mono);white-space:pre-wrap;overflow-wrap:anywhere}.palette-hint{margin-top:8px;color:var(--text-faint);font-size:11px;line-height:1.65}.palette-actions{display:flex;gap:6px;margin-top:12px}.palette-chips-label{margin-top:16px;padding-top:12px;border-top:1px solid var(--border);color:var(--text-faint);font-family:var(--font-ui);font-size:10.5px;letter-spacing:.05em}.palette-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}.chip{border:1px solid var(--border-strong);border-radius:2px;padding:3px 8px;background:var(--surface);color:var(--text-muted);font-family:var(--font-ui);font-size:11px}.chip:hover{border-color:var(--accent-border);background:var(--surface-hover);color:var(--accent)}@media (max-width: 1080px){.tool-guide-grid{grid-template-columns:1fr}}@media (max-width: 900px){.sidebar{position:fixed;inset:0 auto 0 0;z-index:75;width:268px;transform:translate(-100%);transition:transform .18s ease}.sidebar.open{transform:none;box-shadow:var(--shadow-pop)}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:70;background:#0808068c}.mobile-bar{display:flex}.main-content{padding:14px 12px 28px}.tool-panel{padding:16px 12px}.editor-grid,.timestamp-grid{grid-template-columns:1fr}.code-area,.editor-grid .code-area{min-height:240px}.current-time-card{align-items:flex-start;flex-direction:column}.tool-guide-heading{align-items:flex-start;flex-direction:column;gap:8px}.key-value-row{grid-template-columns:116px minmax(0,1fr)}.tool-toolbar{flex-wrap:wrap}}@media (max-width: 700px){.action-row{flex-wrap:wrap}.input-action-row{flex-direction:column}.input-action-row .button{width:100%}.regex-controls{grid-template-columns:1fr}.regex-controls .button{width:100%}.palette-overlay{padding:6vh 10px 10px}.palette-trigger kbd{display:none}.palette-actions{flex-direction:column}.palette-actions .button{width:100%}.support-area{flex-direction:column;gap:2px}.site-footer{padding:8px 12px 44px}.status-strip{gap:6px;font-size:10.5px}}@media (min-width: 1700px){.sidebar{flex:0 0 272px;width:272px;padding:16px 12px}.sidebar-brand strong{font-size:13px}.sidebar-brand span{font-size:11px}.brand-mark{width:34px;height:34px}.brand-mark svg{width:22px;height:22px}.nav-item{padding:6px 10px;font-size:13px}.nav-glyph{width:24px;height:24px;font-size:10px}.palette-trigger{min-height:32px;font-size:11.5px}.tool-panel{padding:28px 30px}.tool-heading h2{font-size:20px}.tool-heading p{font-size:13px}.field-label{font-size:12px}.code-area{font-size:13px}.text-input{height:34px;font-size:13px}.button{min-height:32px;font-size:13px}.ghost{min-height:28px;font-size:11.5px}.editor-grid .code-area{min-height:clamp(340px,50vh,700px)}.editor-grid .result-area-compact{min-height:200px}.key-value-row{grid-template-columns:190px minmax(0,1fr);font-size:12.5px}.tool-guide{padding:22px 24px}.tool-guide article{padding:15px}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{transition:none!important;animation:none!important}}