*{margin:0;padding:0;box-sizing:border-box}
:root{
--bg:#eef2f7;--card:#ffffff;--text:#0f172a;--muted:#64748b;--border:#e2e8f0;
--primary:#2563eb;--primary-d:#1d4ed8;--primary-soft:#eff6ff;
--header-bg:linear-gradient(135deg,#1e3a8a 0%,#2563eb 60%,#3b82f6 100%);
--input-bg:#f8fafc;--code-bg:#0f172a;--code-fg:#e2e8f0;
--shadow:0 1px 3px rgba(15,23,42,.08),0 4px 14px rgba(15,23,42,.05);
--radius:14px;--chip:#f1f5f9;
}
[data-theme="dark"]{
--bg:#0a0f1c;--card:#101a2e;--text:#e2e8f0;--muted:#8ea0b8;--border:#1d2c47;
--primary:#3b82f6;--primary-d:#2563eb;--primary-soft:#132641;
--header-bg:linear-gradient(135deg,#0b1830 0%,#14306b 60%,#1d4ed8 100%);
--input-bg:#0a1322;--code-bg:#050a14;--code-fg:#cbd5e1;
--shadow:0 1px 3px rgba(0,0,0,.4),0 4px 14px rgba(0,0,0,.3);
--chip:#16233c;
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6;transition:background .25s,color .25s}
header.top{position:sticky;top:0;z-index:100;background:var(--header-bg);color:#fff;box-shadow:0 2px 12px rgba(0,0,0,.18)}
.hwrap{max-width:1200px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none}
.logo .em{font-size:28px}
.logo h1{font-size:20px;font-weight:800;letter-spacing:.5px}
.logo small{display:block;font-size:11px;opacity:.8;font-weight:400}
.search{flex:1;min-width:180px;max-width:460px;position:relative}
.search input{width:100%;padding:10px 14px 10px 38px;border:none;border-radius:999px;font-size:14px;background:rgba(255,255,255,.16);color:#fff;outline:none;transition:background .2s}
.search input::placeholder{color:rgba(255,255,255,.65)}
.search input:focus{background:rgba(255,255,255,.26)}
.search .si{position:absolute;left:13px;top:50%;transform:translateY(-50%);opacity:.7}
.theme-btn{background:rgba(255,255,255,.16);border:none;color:#fff;font-size:18px;width:40px;height:40px;border-radius:50%;cursor:pointer;transition:background .2s}
.theme-btn:hover{background:rgba(255,255,255,.3)}
.chips{max-width:1200px;margin:0 auto;padding:12px 20px 0;display:flex;gap:8px;overflow-x:auto;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex-shrink:0;border:1px solid var(--border);background:var(--card);color:var(--text);padding:7px 15px;border-radius:999px;font-size:13px;cursor:pointer;transition:all .15s;box-shadow:var(--shadow)}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.on{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:600}
.container{max-width:1200px;margin:0 auto;padding:16px 20px 30px}
.ad-slot{background:var(--card);border:1px dashed var(--border);border-radius:var(--radius);text-align:center;color:var(--muted);font-size:12px;padding:16px;margin:14px 0;box-shadow:var(--shadow)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:14px;margin-top:6px}
.tcard{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px 16px;cursor:pointer;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s,border-color .15s}
.tcard:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(37,99,235,.14);border-color:var(--primary)}
.tcard .ic{font-size:30px;margin-bottom:10px}
.tcard h3{font-size:15px;font-weight:700;margin-bottom:6px}
.tcard p{font-size:12.5px;color:var(--muted);line-height:1.5}
.tcard .cat{font-size:11px;color:var(--primary);font-weight:600;margin-top:8px}
.empty{text-align:center;color:var(--muted);padding:60px 20px;font-size:15px;grid-column:1/-1}
#view-tool{display:none}
.backbtn{display:inline-flex;align-items:center;gap:6px;background:var(--card);border:1px solid var(--border);color:var(--text);padding:8px 16px;border-radius:999px;font-size:13px;cursor:pointer;margin-bottom:14px;box-shadow:var(--shadow)}
.backbtn:hover{border-color:var(--primary);color:var(--primary)}
.tool-panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}
.tool-panel h2{font-size:21px;margin-bottom:4px}
.tool-panel .tdesc{color:var(--muted);font-size:13px;margin-bottom:20px}
label.lbl{display:block;font-size:13px;font-weight:600;margin:14px 0 6px}
textarea,input[type=text],input[type=number],input[type=date],input[type=datetime-local],select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px;font-family:inherit;background:var(--input-bg);color:var(--text);transition:border-color .15s}
textarea:focus,input:focus,select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
textarea{font-family:Consolas,Menlo,"Courier New",monospace;resize:vertical}
input[type=color]{width:64px;height:44px;padding:3px;border:1px solid var(--border);border-radius:10px;background:var(--input-bg);cursor:pointer}
input[type=checkbox],input[type=radio]{width:auto;accent-color:var(--primary)}
.btn-row{display:flex;gap:10px;margin:14px 0;flex-wrap:wrap;align-items:center}
button.btn{background:var(--primary);color:#fff;border:none;padding:10px 22px;border-radius:10px;font-size:14px;cursor:pointer;font-weight:600;transition:background .15s,transform .1s}
button.btn:hover{background:var(--primary-d)}
button.btn:active{transform:scale(.97)}
button.btn.secondary{background:var(--chip);color:var(--text)}
button.btn.secondary:hover{background:var(--border)}
button.btn.success{background:#16a34a}
button.btn.success:hover{background:#15803d}
button.btn.danger{background:#dc2626}
.result-box{background:var(--code-bg);color:var(--code-fg);border-radius:10px;padding:14px;font-family:Consolas,Menlo,monospace;font-size:13px;white-space:pre-wrap;word-break:break-all;max-height:420px;overflow-y:auto;margin-top:12px;min-height:56px}
.result-box.light{background:var(--input-bg);color:var(--text);border:1px solid var(--border);font-family:inherit}
.hint{font-size:12px;color:var(--muted);margin-top:8px}
.error{color:#ef4444;font-size:13px;margin-top:8px;font-weight:600}
.okmsg{color:#16a34a;font-size:13px;margin-top:8px;font-weight:600}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:14px}
.opts{display:flex;gap:14px;flex-wrap:wrap;margin:12px 0;font-size:14px;align-items:center}
.opts label{display:flex;align-items:center;gap:6px;cursor:pointer;font-weight:normal;margin:0;font-size:14px}
.color-prev{width:100%;height:84px;border-radius:10px;border:1px solid var(--border);margin-top:12px}
.qr-out{display:flex;justify-content:center;margin-top:14px;min-height:40px}
.qr-out svg,.qr-out img{border:8px solid #fff;border-radius:8px;box-shadow:var(--shadow)}
.imgdrop{border:2px dashed var(--border);border-radius:var(--radius);padding:34px 16px;text-align:center;color:var(--muted);cursor:pointer;transition:.2s;background:var(--card)}
.imgdrop:hover,.imgdrop.over{border-color:var(--primary);color:var(--primary);background:rgba(37,99,235,.06)}
input[type=range]{width:100%;accent-color:var(--primary)}
.slider-row{display:grid;grid-template-columns:110px 1fr 70px;gap:10px;align-items:center;margin:10px 0;font-size:14px}
.slider-row .val{text-align:right;font-family:Consolas,Menlo,monospace;font-size:13px}
.img-prev{max-width:100%;border-radius:8px;border:1px solid var(--border);margin-top:12px;display:block}
.pbar{height:10px;background:var(--chip);border-radius:6px;overflow:hidden}
.pfill{height:100%;width:0%;background:var(--primary);border-radius:6px;transition:width .2s}
.img-compare{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.img-compare .img-prev{margin-top:6px}
.checker{background-image:linear-gradient(45deg,#cbd5e1 25%,transparent 25%),linear-gradient(-45deg,#cbd5e1 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#cbd5e1 75%),linear-gradient(-45deg,transparent 75%,#cbd5e1 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0;background-color:#f8fafc}
textarea.ta{width:100%;background:var(--input-bg);border:1px solid var(--border);border-radius:8px;padding:10px;font-size:14px;color:var(--text);font-family:inherit;resize:vertical}
pre.out{background:var(--code-bg);color:var(--code-fg);border-radius:8px;padding:12px;font-size:13px;white-space:pre-wrap;word-break:break-all;max-height:300px;overflow:auto;margin-top:12px}
.crop-stage{position:relative;display:inline-block;max-width:100%;margin-top:12px;touch-action:none}
.crop-stage img{display:block;max-width:100%;user-select:none;-webkit-user-drag:none}
.crop-box{position:absolute;border:2px solid #22d3ee;box-shadow:0 0 0 9999px rgba(0,0,0,.5);cursor:move;box-sizing:border-box}
.crop-handle{position:absolute;width:16px;height:16px;background:#22d3ee;border:2px solid #fff;border-radius:50%;cursor:nwse-resize;box-sizing:border-box}
.pos9{display:grid;grid-template-columns:repeat(3,44px);gap:6px}
.pos9 button{height:38px;border:1px solid var(--border);border-radius:8px;background:var(--card);cursor:pointer;font-size:16px;color:var(--text)}
.pos9 button.on{background:var(--primary);color:#fff;border-color:var(--primary)}
table.kv{width:100%;border-collapse:collapse;font-size:14px;margin-top:12px}
table.kv td{padding:9px 10px;border-bottom:1px solid var(--border);vertical-align:top}
table.kv td:first-child{color:var(--muted);width:150px;flex-shrink:0}
table.kv td.mono{font-family:Consolas,Menlo,monospace;word-break:break-all;font-size:13px}
.copy-ok{color:#16a34a;font-size:13px;margin-left:8px;display:none}
.diff-add{background:rgba(22,163,74,.14);color:#16a34a}
.diff-del{background:rgba(220,38,38,.12);color:#dc2626;text-decoration:line-through}
.diff-line{font-family:Consolas,Menlo,monospace;font-size:13px;padding:3px 8px;border-radius:4px;white-space:pre-wrap;word-break:break-all}
footer{border-top:1px solid var(--border);margin-top:10px}
.fwrap{max-width:1200px;margin:0 auto;padding:26px 20px;text-align:center;color:var(--muted);font-size:12.5px}
.fwrap .fl{display:flex;gap:18px;justify-content:center;margin-bottom:10px;flex-wrap:wrap}
.fwrap a{color:var(--primary);text-decoration:none;cursor:pointer}
.fwrap a:hover{text-decoration:underline}
.privacy{max-width:800px;margin:0 auto;text-align:left;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.privacy h3{margin:14px 0 6px;font-size:15px}
.privacy h3:first-child{margin-top:0}
.privacy p,.privacy li{font-size:13.5px;color:var(--muted);margin-bottom:6px}
.privacy ul{padding-left:20px}
.stat-num{font-size:26px;font-weight:800;color:var(--primary)}
@media(max-width:768px){.grid2,.grid3{grid-template-columns:1fr}.tool-panel{padding:18px 14px}.hwrap{padding:12px 14px}.container{padding:12px 14px 24px}.grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.tcard{padding:14px 12px}.tcard .ic{font-size:26px}}

/* SEO restructure (2026-10-28): homepage cards are now <a> links */
a.tcard{text-decoration:none;color:inherit}