.a4c-overlay{display:none;position:fixed;inset:0;background:rgba(15,27,60,0.72);z-index:9999;align-items:center;justify-content:center;padding:16px;}
    .a4c-overlay.open{display:flex;}
    .a4c-box{background:var(--paper);border-radius:16px;max-width:560px;width:100%;max-height:92vh;overflow:auto;box-shadow:0 20px 50px -10px rgba(0,0,0,0.4);}
    .a4c-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line);font-weight:800;font-size:15px;}
    .a4c-close{background:none;border:none;font-size:20px;cursor:pointer;color:var(--ink-soft);line-height:1;}
    .a4c-hint{font-size:12px;color:var(--ink-soft);padding:12px 18px 0;margin:0;line-height:1.5;}
    .a4c-stage{position:relative;margin:14px 18px;background:#222;border-radius:10px;overflow:hidden;user-select:none;touch-action:none;}
    .a4c-stage img{display:block;width:100%;height:auto;}
    .a4c-sel{position:absolute;border:2px solid #fff;box-sizing:border-box;cursor:move;box-shadow:0 0 0 9999px rgba(0,0,0,0.45);}
    .a4c-handle{position:absolute;width:18px;height:18px;background:var(--orange,#F2782F);border:2px solid #fff;border-radius:50%;}
    .a4c-handle[data-corner="nw"]{top:-10px;left:-10px;cursor:nwse-resize;}
    .a4c-handle[data-corner="ne"]{top:-10px;right:-10px;cursor:nesw-resize;}
    .a4c-handle[data-corner="sw"]{bottom:-10px;left:-10px;cursor:nesw-resize;}
    .a4c-handle[data-corner="se"]{bottom:-10px;right:-10px;cursor:nwse-resize;}
    .a4c-slider-row{display:flex;align-items:center;gap:10px;padding:0 18px;font-size:12.5px;font-weight:700;}
    .a4c-slider-row input[type=range]{flex:1;}
    .a4c-btns{display:flex;gap:10px;padding:16px 18px 18px;}
    .a4c-btns button{flex:1;padding:12px;border-radius:9px;font-weight:700;font-size:13.5px;cursor:pointer;font-family:inherit;}
    .a4c-cancel{background:var(--paper-2);border:1.5px solid var(--line);color:var(--ink);}
    .a4c-ok{background:var(--orange,#F2782F);border:none;color:#fff;}