:root{
  --bg:#f5f7fb;
  --card:#ffffff;
  --line:#e5e9f0;
  --line-soft:#eef1f6;
  --text:#1f2937;
  --text-2:#5b6675;
  --text-3:#8a94a6;
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-soft:#eef4ff;
  --danger:#dc2626;
  --ok:#16a34a;
  --radius:14px;
  --shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font:14px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,p{margin:0}
button{font-family:inherit}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}

.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{
  background:#fff;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:20;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  display:flex;align-items:flex-end;gap:2px;height:30px;padding:5px 7px;
  background:var(--primary);border-radius:8px;
}
.brand-mark i{display:block;width:2px;background:#fff;border-radius:1px}
.brand-mark i:nth-child(1){height:16px}
.brand-mark i:nth-child(2){height:20px}
.brand-mark i:nth-child(3){height:12px}
.brand-mark i:nth-child(4){height:18px}
.brand-mark i:nth-child(5){height:10px}
.brand-mark i:nth-child(6){height:20px}
.brand-mark i:nth-child(7){height:14px}
.brand-text h1{font-size:18px;font-weight:700;letter-spacing:.2px}
.brand-text p{font-size:12px;color:var(--text-3)}
.header-tips{display:flex;gap:8px}
.chip{
  font-size:12px;color:var(--text-2);background:var(--primary-soft);
  border:1px solid #dbe6ff;padding:4px 10px;border-radius:999px;
}

/* ---------- mode switch ---------- */
.mode-switch{
  display:inline-flex;gap:4px;background:#e9edf5;padding:4px;border-radius:12px;margin:22px 0 18px;
}
.mode-btn{
  border:0;background:transparent;color:var(--text-2);
  padding:8px 22px;border-radius:9px;font-size:14px;font-weight:600;cursor:pointer;
}
.mode-btn.active{background:#fff;color:var(--primary);box-shadow:0 1px 3px rgba(16,24,40,.12)}

/* ---------- layout ---------- */
.panel.hidden{display:none}
.grid-2{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}
.batch-grid{grid-template-columns:minmax(0,420px) minmax(0,1fr)}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);
}
.card+.card,.grid-2+.card{margin-top:0}
.style-card{margin-top:18px}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:10px}
.card-head h2{font-size:15px;font-weight:700;display:flex;align-items:center;gap:9px}
.step{
  width:20px;height:20px;border-radius:6px;background:var(--primary);color:#fff;
  font-size:12px;display:inline-flex;align-items:center;justify-content:center;
}
.badge{
  font-size:12px;color:var(--primary);background:var(--primary-soft);
  padding:3px 10px;border-radius:999px;font-weight:600;
}
.badge.soft{color:var(--text-2);background:#f1f4f9}

/* ---------- form ---------- */
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:6px;font-weight:600}
textarea,input[type=text],input[type=number],select{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:9px;
  background:#fff;color:var(--text);font-size:14px;font-family:inherit;outline:none;
  transition:border-color .15s,box-shadow .15s;
}
textarea{resize:vertical;line-height:1.5}
textarea:focus,input:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
select{cursor:pointer}
.mini-select{width:auto;padding:7px 10px;font-size:13px}
.hint{margin:6px 0 0;font-size:12px;color:var(--text-3)}
.grid-form{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}

/* ---------- buttons ---------- */
.btn{
  border:1px solid transparent;border-radius:9px;padding:9px 16px;font-size:14px;
  font-weight:600;cursor:pointer;transition:.15s;white-space:nowrap;
}
.btn.primary{background:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark)}
.btn.ghost{background:#fff;border-color:var(--line);color:var(--text-2)}
.btn.ghost:hover{border-color:#c9d3e4;color:var(--text)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.small{padding:7px 14px;font-size:13px}
.btn.tiny{padding:5px 11px;font-size:12px;border-radius:8px}
.btn.block{width:100%;margin-top:6px}
.btn-row{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}

/* ---------- preview ---------- */
.preview-card{display:flex;flex-direction:column}
.preview-box{
  flex:1;min-height:220px;border:1px dashed var(--line);border-radius:12px;
  background:
    linear-gradient(45deg,#fafbfd 25%,transparent 25%) -8px 0,
    linear-gradient(-45deg,#fafbfd 25%,transparent 25%) -8px 0,
    linear-gradient(45deg,transparent 75%,#fafbfd 75%),
    linear-gradient(-45deg,transparent 75%,#fafbfd 75%);
  background-size:16px 16px;
  display:flex;align-items:center;justify-content:center;padding:18px;overflow:auto;
}
#previewCanvas{max-width:100%;height:auto;display:block;box-shadow:0 2px 10px rgba(16,24,40,.08)}
.preview-error{
  color:var(--danger);font-size:13px;text-align:center;max-width:320px;line-height:1.7;
}
.preview-meta{
  margin-top:12px;font-size:12px;color:var(--text-3);
  display:flex;gap:14px;flex-wrap:wrap;min-height:18px;
}
.preview-meta span b{color:var(--text-2);font-weight:600}

/* ---------- samples ---------- */
.sample-row{display:flex;gap:8px;flex-wrap:wrap}
.sample-row button{
  border:1px solid var(--line);background:#fff;color:var(--text-2);
  border-radius:8px;padding:5px 11px;font-size:12px;cursor:pointer;transition:.15s;
}
.sample-row button:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}

/* ---------- segmented ---------- */
.seg{display:flex;background:#f1f4f9;border-radius:10px;padding:3px;margin-bottom:16px}
.seg-btn{
  flex:1;border:0;background:transparent;padding:7px 10px;border-radius:8px;
  font-size:13px;font-weight:600;color:var(--text-2);cursor:pointer;
}
.seg-btn.active{background:#fff;color:var(--primary);box-shadow:0 1px 3px rgba(16,24,40,.1)}
.src-pane.hidden{display:none}

.rule-preview{
  background:#f7f9fc;border:1px solid var(--line-soft);border-radius:10px;
  padding:10px 12px;margin-top:14px;font-size:12px;color:var(--text-2);
  display:flex;gap:10px;align-items:baseline;
}
.rule-preview .lbl{color:var(--text-3);flex:none}
.rule-preview code{word-break:break-all;color:var(--text)}

/* ---------- dropzone ---------- */
.dropzone{
  border:2px dashed #cbd5e6;border-radius:12px;padding:26px 16px;text-align:center;
  cursor:pointer;transition:.18s;background:#fbfcfe;
}
.dropzone:hover,.dropzone.over{border-color:var(--primary);background:var(--primary-soft)}
.dz-icon{font-size:26px;color:var(--primary);line-height:1}
.dz-title{font-size:14px;font-weight:600;margin-top:6px}
.dz-sub{font-size:12px;color:var(--text-3);margin-top:4px}
#colField{margin-top:14px}
.dz-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:12px}

/* ---------- batch ---------- */
.batch-toolbar{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line-soft);
}
.grow{flex:1}
.check{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);cursor:pointer;user-select:none}
.check input{width:15px;height:15px;accent-color:var(--primary);cursor:pointer}

.batch-empty{
  text-align:center;padding:46px 16px;color:var(--text-3);
  border:1px dashed var(--line);border-radius:12px;background:#fbfcfe;
}
.batch-empty p{font-size:14px;color:var(--text-2);font-weight:600}
.batch-empty span{font-size:12px}

.batch-list{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:12px;
  max-height:520px;overflow:auto;padding-right:4px;
}
.bi{
  border:1px solid var(--line);border-radius:11px;padding:10px;background:#fff;
  display:flex;flex-direction:column;gap:8px;position:relative;transition:.15s;
}
.bi:hover{border-color:#c3d2ea;box-shadow:0 4px 14px rgba(16,24,40,.07)}
.bi-top{display:flex;align-items:center;gap:6px}
.bi-top input{width:15px;height:15px;accent-color:var(--primary);cursor:pointer;flex:none}
.bi-idx{font-size:11px;color:var(--text-3);font-weight:600}
.bi-canvas{
  display:flex;align-items:center;justify-content:center;min-height:74px;
  background:#fafbfd;border-radius:8px;padding:6px;overflow:hidden;
}
.bi-canvas canvas{max-width:100%;height:auto}
.bi-val{
  font-size:12px;color:var(--text-2);word-break:break-all;text-align:center;
  font-family:ui-monospace,Menlo,Consolas,monospace;min-height:17px;
}
.bi-val.err{color:var(--danger)}
.bi-act{display:flex;gap:6px}
.bi-act button{
  flex:1;border:1px solid var(--line);background:#fff;border-radius:7px;
  font-size:11px;padding:4px 0;color:var(--text-2);cursor:pointer;transition:.15s;
}
.bi-act button:hover{border-color:var(--primary);color:var(--primary)}

/* ---------- presets ---------- */
.presets{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(122px,1fr));gap:12px;
  margin-bottom:20px;
}
.preset{
  border:1px solid var(--line);border-radius:12px;padding:9px;cursor:pointer;
  background:#fff;text-align:center;transition:.15s;
}
.preset:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(16,24,40,.09)}
.preset.active{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.14)}
.preset .pv{
  height:52px;border-radius:8px;display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.preset .pv span{display:flex;align-items:flex-end;gap:1.5px}
.preset .pv i{display:block;border-radius:.5px}
.preset .pn{font-size:12px;margin-top:8px;color:var(--text-2);font-weight:600}

/* ---------- attrs ---------- */
.attrs{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px 20px;
  border-top:1px solid var(--line-soft);padding-top:18px;
}
.attr label{
  display:flex;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-2);font-weight:600;margin-bottom:8px;
}
.attr label b{color:var(--primary);font-weight:700}
.attr input[type=range]{width:100%;accent-color:var(--primary);cursor:pointer}
.color-cell{display:flex;align-items:center;gap:8px}
.color-cell input[type=color]{
  width:38px;height:30px;padding:2px;border:1px solid var(--line);border-radius:8px;cursor:pointer;background:#fff;
}
.color-cell code{font-size:12px;color:var(--text-2)}
.attr.checks{display:flex;align-items:center;gap:14px;flex-wrap:wrap;align-self:end;padding-bottom:4px}

/* ---------- footer / toast / overlay ---------- */
.site-foot{margin:26px 0 40px;text-align:center;font-size:12px;color:var(--text-3)}
.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);
  background:#111827;color:#fff;padding:11px 20px;border-radius:10px;font-size:13px;
  opacity:0;pointer-events:none;transition:.25s;z-index:60;max-width:80vw;text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.overlay{
  position:fixed;inset:0;background:rgba(15,23,42,.42);backdrop-filter:blur(2px);
  display:flex;align-items:center;justify-content:center;z-index:70;
}
.overlay[hidden]{display:none}
.overlay-box{
  background:#fff;border-radius:14px;padding:26px 40px;text-align:center;box-shadow:var(--shadow);
}
.overlay-box p{margin-top:12px;font-size:13px;color:var(--text-2)}
.spinner{
  width:34px;height:34px;margin:0 auto;border:3px solid #dbe3f0;border-top-color:var(--primary);
  border-radius:50%;animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .grid-2,.batch-grid{grid-template-columns:1fr}
  .batch-list{max-height:400px}
}
@media (max-width:560px){
  .grid-form{grid-template-columns:1fr}
  .header-tips{display:none}
  .container{padding:0 14px}
}