:root{--bg:#f6f7f9;--surface:#ffffff;--border:#e5e7eb;--text:#1f2328;--muted:#6b7280;--brand:#2563eb;--brand-dark:#1d4ed8;--accent:#f59e0b;--radius:12px;--shadow:0 1px 3px rgba(0,0,0,0.06),0 1px 2px rgba(0,0,0,0.04)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Microsoft YaHei,PingFang SC,Hiragino Sans GB,sans-serif;line-height:1.65;font-size:16px}a{color:var(--brand);text-decoration:none}a:hover{color:var(--brand-dark);text-decoration:underline}h1{font-size:1.6rem;margin:.2em 0 .4em}h2{font-size:1.2rem;margin:1.6em 0 .6em}.container{max-width:960px;margin:0 auto;padding:0 16px}.site-header{background:var(--surface);border-bottom:1px solid var(--border)}.site-header .container{display:flex;align-items:center;gap:20px;min-height:60px;flex-wrap:wrap}.logo{font-weight:700;font-size:1.15rem;color:var(--text)}.logo:hover{text-decoration:none}.main-nav{display:flex;gap:16px;flex-wrap:wrap}.main-nav a,.site-footer{color:var(--muted)}.site-footer{border-top:1px solid var(--border);margin-top:48px;padding:24px 0;font-size:.85rem;text-align:center}.site-footer a{color:var(--muted)}main{padding:24px 0 8px;min-height:60vh}.hero{text-align:center;padding:28px 16px 24px;background:linear-gradient(180deg,#eef4ff 0,var(--bg) 100%);border-radius:16px;margin-top:8px}.hero-title{font-size:2rem;margin:0}.hero-logo{font-size:2.2rem}.hero .tagline{color:var(--muted);margin:6px 0 0}.feature-strip{list-style:none;padding:0;margin:16px 0 8px;display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px}.feature-strip li{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px}.feature-icon{font-size:1.5rem;line-height:1}.feature-title{font-weight:600;font-size:.95rem}.feature-desc{color:var(--muted);font-size:.8rem}.category-block{margin-top:32px}.category-title{display:flex;align-items:center;gap:8px;margin-bottom:12px}.category-count{font-size:.75rem;font-weight:500;color:var(--muted);background:var(--bg);border:1px solid var(--border);border-radius:999px;padding:1px 9px}.tool-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));grid-gap:12px;gap:12px}.tool-card{display:flex;align-items:flex-start;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);color:var(--text);height:100%;transition:border-color .15s,transform .15s,box-shadow .15s}.tool-card:hover{border-color:var(--brand);text-decoration:none;transform:translateY(-2px);box-shadow:0 6px 16px rgba(37,99,235,.12)}.tool-icon{font-size:1.6rem;line-height:1.2;flex-shrink:0}.tool-card-body{min-width:0}.tool-card .tool-name{font-weight:600}.tool-card .tool-desc{color:var(--muted);font-size:.85rem;margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.tool-card-sm{align-items:center}.tool-card-sm .tool-icon{font-size:1.3rem}.search-icon{margin-right:8px}@media (max-width:560px){.feature-strip{grid-template-columns:1fr}}.search-box{position:relative;max-width:460px;margin:16px auto 0}.search-box input{width:100%;padding:10px 14px;font-size:1rem;border:1px solid var(--border);border-radius:999px;background:var(--surface);outline:none}.search-box input:focus{border-color:var(--brand)}.search-results{list-style:none;margin:6px 0 0;padding:6px;position:absolute;left:0;right:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);z-index:10;text-align:left}.search-results li a{display:block;padding:8px 10px;border-radius:8px;color:var(--text)}.search-results li a:hover{background:var(--bg);text-decoration:none}.search-empty{padding:8px 10px;color:var(--muted)}.breadcrumb{font-size:.85rem;color:var(--muted);margin-bottom:8px}.tool-h1{display:flex;align-items:center;gap:10px}.tool-h1-icon{font-size:1.8rem;line-height:1}.tool-intro{color:var(--muted);margin:0 0 12px;font-size:.95rem}.privacy-badge{display:inline-block;background:#ecfdf5;color:#047857;border:1px solid #a7f3d0;border-radius:999px;padding:4px 12px;font-size:.85rem;margin:0 0 16px}.tool-region{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.tool-crashed,.tool-loading{color:var(--muted);padding:24px;text-align:center}.tool-region textarea{width:100%;resize:vertical;padding:12px;font-size:1rem;line-height:1.7;border:1px solid var(--border);border-radius:8px;font-family:inherit;outline:none}.tool-region textarea:focus{border-color:var(--brand)}.stat-grid{list-style:none;padding:0;margin:16px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));grid-gap:10px;gap:10px}.stat-cell{background:var(--bg);border-radius:8px;padding:12px;text-align:center}.stat-num{font-size:1.4rem;font-weight:700;color:var(--brand)}.stat-label{font-size:.8rem;color:var(--muted);margin-top:2px}.tool-crashed p{margin:4px 0}.howto ol{padding-left:1.4em}.faq-item{margin-bottom:14px}.faq-item dt{font-weight:600}.faq-item dd{margin:4px 0 0;color:var(--muted)}.related .tool-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:36px 16px;text-align:center;color:var(--muted);cursor:pointer;transition:border-color .15s,background .15s}.dropzone.dragging,.dropzone:hover{border-color:var(--brand);background:#f0f6ff}.dropzone input[type=file]{display:none}.control-row{display:flex;align-items:center;gap:12px;margin:16px 0;flex-wrap:wrap}.control-row label{min-width:72px}.control-row input[type=range]{flex:1 1;min-width:160px}.control-row input[type=number],.control-row input[type=text],.control-row select{padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-size:1rem;font-family:inherit}.control-row input[type=text]{flex:1 1;min-width:180px;outline:none}.control-row input[type=number]{width:96px;outline:none}.control-row input[type=number]:focus,.control-row input[type=text]:focus{border-color:var(--brand)}.ts-now{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--bg);border-radius:8px;padding:12px}.ts-now-label{color:var(--muted);font-size:.85rem}.ts-now-val{font-family:ui-monospace,Consolas,Menlo,monospace;font-size:1.1rem;font-weight:700;color:var(--brand);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:6px 10px;cursor:pointer}.ts-now-val em{font-style:normal;font-weight:400;font-size:.75rem;color:var(--muted);margin-left:4px}.ts-h3{font-size:1rem;margin:20px 0 8px}.ts-table{width:100%;border-collapse:collapse}.ts-table th{text-align:left;color:var(--muted);font-weight:500;white-space:nowrap;padding:6px 12px 6px 0;width:110px;vertical-align:top}.ts-table td{font-family:ui-monospace,Consolas,Menlo,monospace;padding:6px 0}.link-btn{background:none;border:none;color:var(--brand);cursor:pointer;font:inherit;padding:0;text-decoration:underline}.pw-output{display:flex;gap:10px;align-items:stretch;flex-wrap:wrap}.pw-value{flex:1 1;min-width:200px;text-align:left;font-family:ui-monospace,Consolas,Menlo,monospace;font-size:1.25rem;font-weight:600;word-break:break-all;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:14px 16px;cursor:pointer;color:var(--text)}.pw-value:hover{border-color:var(--brand)}.pw-copied{color:#047857;font-size:.85rem;margin:6px 0 0}.pw-strength{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--muted);margin:12px 0}.pw-strength-bar{height:6px;border-radius:3px;width:120px;background:var(--border);position:relative;overflow:hidden}.pw-strength-bar:after{content:"";position:absolute;inset:0;border-radius:3px}.pw-weak .pw-strength-bar:after{width:33%;background:#dc2626}.pw-medium .pw-strength-bar:after{width:66%;background:#f59e0b}.pw-strong .pw-strength-bar:after{width:100%;background:#16a34a}.pw-checks{display:flex;flex-wrap:wrap;gap:10px 20px;margin-top:12px}.pw-checks label{display:inline-flex;align-items:center;gap:6px;cursor:pointer}.qr-result{display:flex;flex-direction:column;align-items:center;gap:14px;margin-top:16px}.qr-img{background:#fff;padding:8px;image-rendering:pixelated}.qr-img,.stitch-preview{border:1px solid var(--border);border-radius:8px}.stitch-preview{max-width:100%;max-height:420px;background:repeating-conic-gradient(#f3f4f6 0 25%,#fff 0 50%) 50% /20px 20px}.stitch-list{list-style:none;padding:0;margin:16px 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));grid-gap:10px;gap:10px}.stitch-list li{position:relative}.stitch-list img{width:100%;height:96px;object-fit:cover;border:1px solid var(--border);border-radius:8px;display:block}.stitch-remove{position:absolute;top:-6px;right:-6px;width:22px;height:22px;border-radius:50%;border:none;background:#dc2626;color:#fff;font-size:1rem;line-height:1;cursor:pointer;box-shadow:var(--shadow)}.split-grid{list-style:none;padding:0;margin:16px 0 0;display:grid;grid-gap:4px;gap:4px;background:var(--border);border:1px solid var(--border);border-radius:8px;overflow:hidden}.split-tile{padding:0;border:none;background:none;cursor:pointer;display:block;width:100%}.split-tile img{width:100%;height:100%;object-fit:cover;display:block;transition:opacity .15s}.split-tile:hover img{opacity:.75}input[type=color]{width:40px;height:34px;padding:2px;border:1px solid var(--border);border-radius:8px;background:var(--surface);cursor:pointer}.notfound{text-align:center;padding:24px 0 8px}.notfound-code{font-size:4rem;font-weight:800;color:var(--brand);line-height:1;display:flex;align-items:center;justify-content:center;gap:12px}.notfound-bear{font-size:3.4rem}.notfound-title{margin:12px 0 4px}.notfound-desc{color:var(--muted);margin:0 auto 16px;max-width:420px}.notfound .search-box{margin-left:auto;margin-right:auto}.notfound-actions{margin:18px 0 8px}.notfound-tools{margin-top:24px;text-align:left}.result-compare{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px;margin-top:16px}.result-compare .cell{background:var(--bg);border-radius:8px;padding:12px;text-align:center}.result-compare img{max-width:100%;max-height:220px;border-radius:6px}.result-compare .size{font-weight:600;margin-top:6px}.saving{color:#047857;font-weight:600}.btn{display:inline-block;background:var(--brand);color:#fff;border:none;border-radius:8px;padding:10px 20px;font-size:1rem;cursor:pointer}.btn:hover{background:var(--brand-dark)}.btn[disabled]{opacity:.5;cursor:not-allowed}.tool-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:10px 12px;margin-top:12px}.convert-panes{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px}.pane{display:flex;flex-direction:column}.pane textarea{width:100%;resize:vertical;padding:12px;font-size:1rem;line-height:1.7;border:1px solid var(--border);border-radius:8px;font-family:inherit;outline:none}.pane textarea:focus{border-color:var(--brand)}.pane textarea[readonly]{background:var(--bg)}.pane-foot{display:flex;align-items:center;justify-content:space-between;min-height:34px;margin-top:6px;color:var(--muted);font-size:.85rem}.btn-sm{padding:5px 14px;font-size:.85rem}.btn-secondary{background:#6b7280}.btn-secondary:hover{background:#4b5563}.json-input{width:100%;resize:vertical;padding:12px;font-size:.9rem;line-height:1.6;border:1px solid var(--border);border-radius:8px;font-family:ui-monospace,SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;outline:none;white-space:pre;overflow-wrap:normal;overflow-x:auto}.json-input:focus{border-color:var(--brand)}.json-input[readonly]{background:var(--bg)}.json-error{background:#fef2f2;border:1px solid #fecaca;border-radius:8px;padding:10px 12px;margin-top:12px}.json-error-msg{color:#b91c1c;font-weight:600}.json-error-context{margin:8px 0 0;padding:8px;background:#fff;border-radius:6px;font-family:ui-monospace,Consolas,Menlo,monospace;font-size:.85rem;color:#7f1d1d;overflow-x:auto}@media (max-width:520px){.convert-panes,.result-compare{grid-template-columns:1fr}}.svg-preview{flex:1 1;min-height:220px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:8px;background:var(--bg);padding:12px}.svg-preview img{max-width:100%;max-height:320px}.emoji-picker{display:flex;flex-wrap:wrap;gap:6px}.emoji-btn{width:40px;height:40px;font-size:1.3rem;line-height:1;border:1px solid var(--border);border-radius:8px;background:var(--surface);cursor:pointer}.emoji-btn.active,.emoji-btn:hover{border-color:var(--brand)}.emoji-btn.active{box-shadow:0 0 0 2px rgba(37,99,235,.25)}.crop-stage{position:relative;margin:12px auto;max-width:100%;touch-action:none;-webkit-user-select:none;-moz-user-select:none;user-select:none}.crop-stage img{display:block;width:100%;height:100%;pointer-events:none}.crop-box{position:absolute;border:2px solid var(--brand);box-shadow:0 0 0 100vmax rgba(0,0,0,.35);cursor:move;box-sizing:border-box}.crop-handle{position:absolute;right:-8px;bottom:-8px;width:16px;height:16px;background:var(--brand);border:2px solid #fff;border-radius:50%;cursor:nwse-resize}.crop-dims{color:var(--muted);font-size:.9rem}.checkerboard{background-image:linear-gradient(45deg,#e5e7eb 25%,transparent 0),linear-gradient(-45deg,#e5e7eb 25%,transparent 0),linear-gradient(45deg,transparent 75%,#e5e7eb 0),linear-gradient(-45deg,transparent 75%,#e5e7eb 0);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}