/* 866data 工具页公共样式：新工具统一引用，减少各页重复令牌与控件样式 */
:root{
  --bg:#f7f6f3; --surface:#fff; --surface-2:#f4f1ec; --text:#1f1d1a;
  --muted:#6b6760; --faint:#8b857c; --border:#e8e4dd; --border-strong:#d8d2ca;
  --primary:#9a3412; --primary-hover:#7c2d12; --primary-soft:#fbeee6;
  --radius:12px; --max:760px;
}
*{margin:0;padding:0;box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{
  -webkit-text-size-adjust:100%;text-size-adjust:100%;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav{max-width:var(--max);margin:0 auto;padding:13px 20px;display:flex;align-items:center;justify-content:space-between;gap:10px 16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem}
.brand img{width:30px;height:30px;border-radius:8px}
.brand .accent{color:var(--primary)}
.back{font-size:.86rem;color:var(--primary);font-weight:600}
.nav-burger{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;flex-shrink:0;margin-left:auto;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text);cursor:pointer}
.nav-burger:hover{border-color:var(--primary);color:var(--primary)}
.nav-menu{display:none;flex-direction:column;gap:6px;max-width:var(--max);margin:0 auto;padding:0 20px 12px}
.nav-menu.open{display:flex}
.nav-menu a{padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--surface);font-size:.9rem;color:var(--text)}
.nav-menu a:hover{border-color:var(--primary);color:var(--primary)}
@media (max-width:420px){.nav .back{display:none}}

.sec{padding:30px 0}
h1{font-size:1.6rem;font-weight:800;margin-bottom:6px;overflow-wrap:anywhere}
.lead{color:var(--muted);margin-bottom:22px}
h2{font-size:1.05rem;font-weight:700;margin-bottom:12px}
h3{font-size:.95rem;font-weight:700}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:0 1px 2px rgba(31,29,26,.04),0 6px 20px rgba(31,29,26,.05);margin-bottom:16px}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:14px}
.row:last-child{margin-bottom:0}
.field{display:flex;align-items:center;gap:8px;font-size:.86rem;color:var(--muted);flex-wrap:wrap}
.field input[type=text],.field input[type=number],.field input[type=date],.field input[type=datetime-local],.field select{
  border:1px solid var(--border);border-radius:8px;padding:9px;font-size:.92rem;width:90px;background:var(--surface);color:var(--text)
}
.field select{width:auto;max-width:100%}
.field input[type=text].grow{width:220px;max-width:100%}
.field input[type=number]{width:90px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;background:var(--primary);color:var(--on-solid,#fff);border-radius:999px;padding:10px 22px;font-size:.9rem;font-weight:600;line-height:1.4;transition:background-color .15s,border-color .15s,color .15s}
.btn:hover{background:var(--primary-hover)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.ghost{background:var(--primary-soft);color:var(--primary)}
.btn.ghost:hover{background:var(--primary-soft);color:var(--primary-hover)}
.btn.small{padding:6px 12px;font-size:.82rem}
textarea{width:100%;min-height:200px;border:1px solid var(--border);border-radius:var(--radius);padding:14px;font-size:.9rem;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;line-height:1.8;resize:vertical;background:var(--surface);color:var(--text)}
textarea::placeholder,input::placeholder{color:var(--faint)}
input[type=file]{max-width:100%;font-size:.88rem;color:var(--muted)}
input[type=range]{accent-color:var(--primary);width:140px;max-width:100%}
input[type=color]{width:44px;height:34px;border:1px solid var(--border);border-radius:8px;background:var(--surface);padding:3px}
.note{font-size:.82rem;color:var(--muted)}
.msg{font-size:.86rem;color:var(--muted);min-height:1.5em;margin-top:8px}
.msg.err{color:#b91c1c}
.msg.ok{color:#15803d}
[data-theme="dark"] .msg.err{color:#fca5a5}
[data-theme="dark"] .msg.ok{color:#86efac}
.stats{display:flex;gap:16px;flex-wrap:wrap;font-size:.86rem;color:var(--muted);margin:10px 0}
.stats b{color:var(--text);font-size:1rem}
.split{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.split textarea{min-height:280px}
.seg{display:inline-flex;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:3px;gap:2px;flex-wrap:wrap}
.seg button{border:none;background:transparent;border-radius:7px;padding:7px 13px;font-size:.86rem;color:var(--muted);font-weight:600}
.seg button.on{background:var(--surface);color:var(--primary);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.checks{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:8px 14px;font-size:.88rem;color:var(--text)}
.checks label{display:flex;align-items:center;gap:8px;cursor:pointer}
.checks input{accent-color:var(--primary);width:16px;height:16px;flex-shrink:0}
.result{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:14px;font-size:.95rem;overflow-wrap:anywhere;white-space:pre-wrap}
.result.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9rem}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{border:1px solid var(--border);background:var(--surface);border-radius:999px;padding:5px 11px;font-size:.82rem;color:var(--primary);cursor:pointer}
.chip:hover{border-color:var(--primary)}
.faq{margin-top:28px}
.faq h2{font-size:1.15rem;margin-bottom:14px}
.faq dt{font-weight:700;margin-top:14px}
.faq dd{color:var(--muted);font-size:.9rem;margin-top:4px}
.read-more{margin-top:18px;font-size:.9rem;color:var(--muted)}
.read-more a{color:var(--primary)}
footer.site-footer{border-top:1px solid var(--border);margin-top:40px;padding:24px 0;color:var(--muted);font-size:.82rem;text-align:center}
.footer-more{margin-bottom:10px;line-height:2}
.footer-more a{color:var(--primary);margin:0 6px;white-space:nowrap}
.footer-more a:hover{text-decoration:underline}
@media (max-width:720px){
  .split{grid-template-columns:1fr}
  .split textarea{min-height:200px}
}
@media (max-width:520px){
  .wrap{padding:0 14px}.nav{padding:10px 14px}.brand{font-size:1.05rem}
  .card{padding:14px}h1{font-size:1.35rem}.lead{font-size:.92rem}.sec{padding:22px 0}
  .btn{padding:9px 16px;font-size:.85rem}
  .field input[type=text].grow{width:100%}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* 图片类工具公共控件 */
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.dropzone{border:1.5px dashed var(--border-strong);border-radius:12px;background:var(--surface-2);padding:24px 18px;text-align:center;color:var(--muted);font-size:.9rem;cursor:pointer;transition:border-color .15s,background-color .15s}
.dropzone:hover,.dropzone.drag{border-color:var(--primary);background:var(--primary-soft);color:var(--primary)}
.dropzone b{display:block;color:var(--text);font-size:1rem;margin-bottom:4px}
.dropzone.drag b{color:var(--primary)}
.workbench{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:18px;align-items:start}
.controls{display:flex;flex-direction:column;gap:12px}
.control{display:flex;flex-direction:column;gap:5px;font-size:.86rem;color:var(--muted)}
.control > span:first-child{font-weight:600;color:var(--text)}
.control input[type=text],.control input[type=number],.control select{border:1px solid var(--border);border-radius:8px;padding:8px 9px;font-size:.9rem;background:var(--surface);color:var(--text);width:100%}
.control .inline{display:flex;align-items:center;gap:8px}
.control input[type=range]{width:100%}
.control .val{color:var(--text);font-variant-numeric:tabular-nums}
.preview-box{background-color:var(--surface-2);background-image:linear-gradient(45deg,var(--border) 25%,transparent 25%),linear-gradient(-45deg,var(--border) 25%,transparent 25%),linear-gradient(45deg,transparent 75%,var(--border) 75%),linear-gradient(-45deg,transparent 75%,var(--border) 75%);background-size:18px 18px;background-position:0 0,0 9px,9px -9px,-9px 0;border:1px solid var(--border);border-radius:10px;padding:10px;min-height:180px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.preview-box canvas,.preview-box img{max-width:100%;height:auto;display:block;border-radius:6px;box-shadow:0 1px 4px rgba(0,0,0,.12)}
.empty-preview{color:var(--faint);font-size:.88rem;text-align:center;padding:30px 10px}
.thumb-list{display:flex;flex-direction:column;gap:8px;max-height:420px;overflow:auto;padding-right:2px}
.thumb-item{display:flex;align-items:center;gap:10px;border:1px solid var(--border);border-radius:10px;padding:7px;background:var(--surface)}
.thumb-item img{width:52px;height:52px;object-fit:cover;border-radius:7px;background:var(--surface-2);flex-shrink:0}
.thumb-meta{min-width:0;flex:1;font-size:.8rem;color:var(--muted);line-height:1.5}
.thumb-meta b{display:block;color:var(--text);font-size:.84rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.thumb-actions{display:flex;gap:3px;flex-shrink:0}
.icon-btn{border:1px solid var(--border);background:var(--surface);border-radius:6px;width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;font-size:13px;line-height:1;color:var(--muted)}
.icon-btn:hover{border-color:var(--primary);color:var(--primary)}
.icon-btn:disabled{opacity:.35;cursor:not-allowed}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
@media (max-width:820px){
  .workbench{grid-template-columns:1fr}
  .thumb-list{max-height:260px}
}