:root{
  --bg:#f4f6f9; --panel:#ffffff; --ink:#1f2733; --muted:#5b6675;
  --line:#d9dee6; --accent:#2f6df0; --accent-soft:#e8f0fe;
  --danger:#d23b3b; --ok:#1f9d55; --shadow:0 1px 3px rgba(20,30,50,.08),0 6px 18px rgba(20,30,50,.06);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{
  font:14px/1.5 -apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink); background:var(--bg);
  display:flex; flex-direction:column; height:100vh; overflow:hidden;
}
header{
  display:flex; align-items:center; gap:10px; padding:10px 14px;
  background:var(--panel); border-bottom:1px solid var(--line); flex:0 0 auto;
}
header h1{font-size:15px; margin:0; font-weight:650; letter-spacing:.3px}
.app-logo{display:inline-flex; align-items:center; justify-content:center; width:30px; height:30px; border-radius:8px; box-shadow:0 1px 3px rgba(20,60,160,.28); overflow:hidden; flex:0 0 auto}
.app-logo svg{display:block}
header .spacer{flex:1}
.btn{
  appearance:none; border:1px solid var(--line); background:#fff; color:var(--ink);
  padding:7px 12px; border-radius:8px; cursor:pointer; font-size:13px; line-height:1;
  transition:background .15s,border-color .15s,transform .05s;
}
.btn:hover{border-color:#b9c2cf; background:#fafbfd}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent); border-color:var(--accent); color:#fff}
.btn.primary:hover{background:#2559cf}
.btn.ghost{background:transparent}
main{display:grid; grid-template-columns:248px 1fr 290px; flex:1; min-height:0}
aside{background:var(--panel); overflow:auto; padding:12px}
aside.left{border-right:1px solid var(--line)}
aside.right{border-left:1px solid var(--line)}
.stage-wrap{
  overflow:auto; padding:22px; display:flex; align-items:flex-start; justify-content:center;
  background:repeating-conic-gradient(#eef1f6 0% 25%,#e7ebf2 0% 50%) 0/22px 22px;
}
#stage{
  position:relative; box-shadow:var(--shadow); outline:1px solid var(--line);
  user-select:none; touch-action:none; flex:0 0 auto;
}
#stage .bg{position:absolute; inset:0; width:100%; height:100%; pointer-events:none}
#previewWrap{position:fixed; inset:0; z-index:60; display:flex; align-items:center; justify-content:center}
#previewWrap[hidden]{display:none!important}
#previewWrap .modal-backdrop{position:absolute; inset:0; background:rgba(8,12,18,.6); backdrop-filter:blur(2px)}
.pv-modal{position:relative; z-index:1; max-width:94vw; max-height:92vh; display:flex; flex-direction:column; background:#fff; border:1px solid var(--line); border-radius:12px; box-shadow:0 24px 70px rgba(0,0,0,.45); overflow:hidden}
.pv-head{display:flex; align-items:center; justify-content:space-between; gap:12px; font-size:13px; color:var(--muted); background:#fff; border-bottom:1px solid var(--line); padding:10px 12px}
.pv-body{overflow:auto; padding:14px; display:flex; align-items:center; justify-content:center; background:#1b2330}
#previewBox{position:relative; line-height:0; border:1px solid var(--line); border-radius:6px; overflow:hidden; box-shadow:var(--shadow); flex:0 0 auto}
#previewCanvas{display:block; width:auto; height:auto; max-width:calc(94vw - 30px); max-height:calc(92vh - 70px); background:transparent}
#previewOverlay{position:absolute; inset:0; pointer-events:none}
.pv-web{position:absolute; border:0; background:#27313b; pointer-events:none; overflow:hidden}
.pv-web.ph{display:none}
.pv-interactive{position:absolute; background:transparent; border:none; outline:none; cursor:pointer; pointer-events:auto; z-index:2; display:flex; align-items:center; justify-content:center}
.pv-interactive:hover,.pv-interactive:focus{outline:2px solid rgba(47,109,240,.7); border-radius:2px}
.pv-interactive:active{filter:brightness(.92)}
.dialog-guide{
  position:absolute; border:1px dashed #2f6df0; background:rgba(47,109,240,.06);
  pointer-events:none; color:#2f6df0; font-size:11px;
}
.el{
  position:absolute; border:1px solid rgba(31,39,51,.5); background:rgba(255,255,255,.14);
  color:#fff; display:flex; align-items:center; justify-content:center; text-align:center;
  font-size:12px; padding:3px; overflow:hidden; cursor:move;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.25);
}
.el.sel{border-color:var(--accent); box-shadow:0 0 0 2px var(--accent); z-index:50}
.el .handle{
  position:absolute; right:-5px; bottom:-5px; width:12px; height:12px;
  background:var(--accent); border:2px solid #fff; border-radius:3px; cursor:nwse-resize;
}
.el.t-web{background:rgba(34,40,54,.55); border-color:#8aa0c8}
.el.t-bar{background:repeating-linear-gradient(45deg,rgba(47,109,240,.5) 0 8px,rgba(47,109,240,.25) 8px 16px); border-color:#2f6df0}
.el.t-img{background:rgba(31,157,85,.35); border-color:#1f9d55}
.el.t-webpage{background:rgba(122,60,150,.45); border-color:#c77dff}
.el.t-text{background:rgba(0,0,0,.25)}
#stage.has-ref .el{background:rgba(18,24,36,.38); border:2px solid rgba(255,206,64,.95); color:#fff; text-shadow:0 1px 2px rgba(0,0,0,.9); box-shadow:0 0 0 1px rgba(0,0,0,.4),0 2px 6px rgba(0,0,0,.35);}
#stage.has-ref .el.sel{background:rgba(47,109,240,.28); border:2px solid var(--accent); box-shadow:0 0 0 2px var(--accent); z-index:50}
#stage.has-ref .el .tag{color:#fff; opacity:1; background:rgba(0,0,0,.45); padding:0 3px; border-radius:3px}
#stage.has-ref .el .handle{right:2px; bottom:2px; border:2px solid #ffce40; box-shadow:0 1px 2px rgba(0,0,0,.5)}
#stage.has-ref .el.t-webpage{border-style:dotted}
#stage.has-ref .dialog-guide{background:transparent; border-color:rgba(47,109,240,.55); color:var(--accent); opacity:.8}
.el .tag{position:absolute; top:1px; left:3px; font-size:9px; opacity:.8; color:#cdd6e6; pointer-events:none}
.el-img{position:absolute; inset:0; width:100%; height:100%; object-fit:fill; pointer-events:none}
.el .el-text{padding:0 4px}
.group{margin-bottom:16px}
.group>h2{font-size:12px; text-transform:uppercase; letter-spacing:.6px; color:var(--muted); margin:0 0 8px}
.field{margin-bottom:9px}
.field label{display:block; font-size:12px; color:var(--muted); margin-bottom:3px}
.field input,.field select,.field textarea{
  width:100%; padding:6px 8px; border:1px solid var(--line); border-radius:7px;
  font:inherit; color:var(--ink); background:#fff;
}
.field textarea{resize:vertical; min-height:64px; font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace; font-size:12px}
.field.row2{display:flex; gap:8px}
.field.row2>div{flex:1}
.addbtn{
  width:100%; text-align:left; margin-bottom:6px; display:flex; align-items:center; gap:8px;
  padding:8px 10px;
}
.addbtn .dot{width:9px;height:9px;border-radius:2px;flex:0 0 auto}
.hint{font-size:11px; color:var(--muted); line-height:1.4}
.empty{color:var(--muted); font-size:12px; padding:8px 0}
.pill{display:inline-block; font-size:11px; background:var(--accent-soft); color:var(--accent); padding:1px 7px; border-radius:20px; margin-left:6px}
.seg{display:flex; gap:6px; flex-wrap:wrap}
.seg .btn{padding:5px 9px; font-size:12px}
.seg .btn.on{background:var(--accent-soft); border-color:var(--accent); color:var(--accent)}
input[type=color]{height:34px; padding:2px}
#selExample{
  appearance:none;
  background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%235b6675' d='M0 1l5 5 5-5z'/%3E%3C/svg%3E") no-repeat right 10px center;
  padding-right:26px;
}
.row-inline{display:flex; align-items:center; gap:8px}
.row-inline .grow{flex:1}
.swatch{width:16px;height:16px;border-radius:4px;border:1px solid var(--line);flex:0 0 auto}
details{margin-bottom:14px; border:1px solid var(--line); border-radius:9px; background:#fff}
details>summary{cursor:pointer; padding:9px 11px; font-weight:600; font-size:13px; list-style:none}
details>summary::-webkit-details-marker{display:none}
details[open]>summary{border-bottom:1px solid var(--line)}
details .body{padding:11px}
.toast{
  position:fixed; left:50%; bottom:22px; transform:translateX(-50%) translateY(20px);
  background:#1f2733; color:#fff; padding:9px 16px; border-radius:10px; font-size:13px;
  opacity:0; pointer-events:none; transition:opacity .2s,transform .2s; z-index:999;
}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0)}
.toast.err{background:var(--danger)}
.lang-switch{display:inline-flex; align-items:center; background:var(--panel); border:1px solid var(--line); border-radius:10px; padding:3px; gap:2px}
.lang-switch button{
  appearance:none; border:0; background:transparent; color:var(--muted);
  padding:6px 13px; border-radius:8px; cursor:pointer; font-size:12.5px; line-height:1;
  transition:background .15s,color .15s;
}
.lang-switch button:hover{color:var(--ink); background:#f1f4f9}
.lang-switch button.active{background:var(--accent); color:#fff; font-weight:600; box-shadow:0 1px 3px rgba(20,60,160,.28)}
.copyright{
  position:fixed; left:14px; bottom:14px; z-index:40;
  background:var(--panel); border:1px solid var(--line); border-radius:12px;
  padding:9px 13px; box-shadow:var(--shadow); color:var(--muted);
  font-size:11.5px; line-height:1.45; max-width:220px;
}
.copyright .cr-row{display:flex; align-items:center; gap:6px}
.copyright .cr-badge{
  display:inline-flex; align-items:center; justify-content:center;
  width:18px; height:18px; border-radius:50%; background:var(--accent-soft);
  color:var(--accent); font-weight:700; font-size:11px; flex:0 0 auto;
}
.copyright b{color:var(--ink); font-weight:600}
.copyright .cr-sub{margin-top:3px; padding-left:24px; font-size:11px}
.copyright .cr-qq{color:var(--accent); font-weight:600}
.grp-h{font-size:11px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.6px;margin:12px 0 6px;border-bottom:1px dashed var(--line);padding-bottom:3px}
.grp-h:first-child{margin-top:0}
.addbtn.composite{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:600}
.addbtn.composite:disabled{opacity:.55;cursor:not-allowed}
.disclaimer{background:#fffdf5; border-color:#f0e2b8}
.disclaimer>summary{color:#8a6d1f}
.disclaimer .body{max-height:240px; overflow:auto}
.disclaimer .body p{font-size:11px; color:var(--muted); line-height:1.5; margin:0 0 8px}
.disclaimer .body p:last-child{margin-bottom:0}
.disclaimer .body code{background:#f1f4f9; padding:0 4px; border-radius:4px; font-size:10.5px; color:var(--ink)}
@keyframes ckFlash{0%{background:var(--accent-soft);box-shadow:0 0 0 3px var(--accent)}100%{background:transparent;box-shadow:none}}
.ck-flash{animation:ckFlash 1.1s ease-out}
@media (prefers-reduced-motion:reduce){*{transition:none!important}.ck-flash{animation:none}}