:root{--blue:#007aff;--bg:#f5f5f7;--card:#fff;--txt:#1d1d1f;--sub:#6e6e73;--line:#d2d2d7}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--txt);font:17px/1.4 -apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Helvetica Neue",sans-serif;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;overflow:hidden}
header{position:fixed;top:0;left:0;right:0;height:calc(56px + env(safe-area-inset-top));padding:env(safe-area-inset-top) 12px 0;display:flex;align-items:center;gap:12px;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line);z-index:10}
.nav{border:0;background:none;color:var(--blue);font-size:17px;min-height:44px;min-width:72px;padding:0 8px}
.nav:disabled{color:#c7c7cc}
.steps{flex:1;display:flex;justify-content:center;gap:8px;font-size:15px}
.steps span{padding:6px 12px;border-radius:999px;color:var(--sub)}
.steps span.on{background:var(--blue);color:#fff}
.steps span.done{color:var(--blue)}
main{position:absolute;top:calc(56px + env(safe-area-inset-top));left:0;right:0;bottom:0}
.page{position:absolute;inset:0}
.hidden{display:none!important}
#pg1{overflow:auto;padding:28px;text-align:center}
h1{font-size:28px;margin:12px 0 4px;font-weight:600}
.sub{color:var(--sub);margin:4px 0 20px;font-size:15px}
.pick{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}
.tile{position:relative;width:min(42vw,380px);aspect-ratio:3/4;background:var(--card);border-radius:18px;border:2px dashed var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden}
.tile input{position:absolute;inset:0;opacity:0;width:100%;height:100%}
.tile .ph{display:flex;flex-direction:column;gap:6px;pointer-events:none}.tile .ph b{font-size:22px}.tile .ph span{color:var(--sub);font-size:15px}
.tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#fff;pointer-events:none}
.tile img:not([src]){display:none}
.tile.ok{border:2px solid var(--blue)}
.big{min-height:52px;padding:0 22px;border-radius:14px;border:0;background:#e8e8ed;color:var(--txt);font-size:17px;font-weight:500;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}
.big.primary{background:var(--blue);color:#fff}
.big:disabled{opacity:.4}
.big.on{background:#1d1d1f;color:#fff}
#btnNext1{margin-top:24px;min-width:240px}
#stage{position:absolute;inset:0 0 0 0;background:#e9e9ee;touch-action:none}
#cv{width:100%;height:100%;display:block;touch-action:none}
.hint{position:absolute;left:50%;top:14px;transform:translateX(-50%);background:rgba(29,29,31,.82);color:#fff;padding:10px 18px;border-radius:999px;font-size:15px;pointer-events:none;max-width:90%;text-align:center}
.hint:empty{display:none}
.bar{position:absolute;left:0;right:0;bottom:0;padding:12px 16px calc(12px + env(safe-area-inset-bottom));display:flex;gap:10px;justify-content:center;background:rgba(255,255,255,.9);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--line)}
.bar .big{flex:1;max-width:200px}
.zoomctl{position:absolute;right:14px;top:14px;display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.9);border-radius:12px;padding:4px 10px 4px 4px;font-size:14px}
.zoomctl button{border:0;background:#e8e8ed;border-radius:9px;min-height:36px;padding:0 12px;font-size:15px}
#splitBar{position:absolute;top:0;bottom:0;width:44px;margin-left:-22px;touch-action:none}
#splitBar i{position:absolute;left:21px;top:0;bottom:0;width:2px;background:#fff;box-shadow:0 0 3px rgba(0,0,0,.5)}
#splitBar::after{content:"‹ ›";position:absolute;top:50%;left:2px;width:40px;height:40px;margin-top:-20px;border-radius:50%;background:#fff;box-shadow:0 1px 6px rgba(0,0,0,.3);display:flex;align-items:center;justify-content:center;font-weight:600;color:#1d1d1f}
.sheet{position:fixed;right:12px;top:calc(68px + env(safe-area-inset-top));bottom:96px;width:min(380px,92vw);background:var(--card);border-radius:18px;box-shadow:0 10px 40px rgba(0,0,0,.18);padding:0 18px 18px;overflow:auto;z-index:20}
.sheet-h{display:flex;justify-content:space-between;align-items:center;min-height:56px;position:sticky;top:0;background:inherit}
.done{border:0;background:none;color:var(--blue);font-size:17px;font-weight:600;min-height:44px}
.row{display:flex;align-items:center;gap:10px;margin:12px 0;font-size:15px}
.row input[type=range]{flex:1;height:32px}
.row output{width:44px;text-align:right;color:var(--sub);font-variant-numeric:tabular-nums}
.seg{display:flex;background:#e8e8ed;border-radius:12px;padding:3px}
.seg button{flex:1;border:0;background:none;min-height:44px;border-radius:10px;font-size:16px}
.seg button.on{background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.15);font-weight:600}
.btns{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:30;display:flex;flex-direction:column;align-items:center;justify-content:center}
#modalD{background:var(--bg);justify-content:flex-start}#modalD .sheet-h{width:100%;padding:env(safe-area-inset-top) 18px 0;background:#fff}
.stage2{flex:1;width:100%;position:relative;touch-action:none}#cvD{width:100%;height:100%;display:block;touch-action:none}
.card{background:#fff;border-radius:18px;padding:22px;min-width:300px;max-width:440px;text-align:center}
.card h2{margin:0 0 8px;font-size:21px}
#busy{position:fixed;inset:0;background:rgba(245,245,247,.6);z-index:40;display:flex;align-items:center;justify-content:center}
.spin{width:34px;height:34px;border:3px solid #d2d2d7;border-top-color:var(--blue);border-radius:50%;margin:4px auto 10px;animation:sp 0.9s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
#toast{position:fixed;left:50%;top:calc(120px + env(safe-area-inset-top));transform:translateX(-50%) translateY(20px);background:rgba(29,29,31,.9);color:#fff;padding:12px 20px;border-radius:14px;font-size:15px;opacity:0;transition:.25s;pointer-events:none;z-index:50}
#toast.show{opacity:1;transform:translateX(-50%)}

.big.icon{flex:0 0 56px;min-width:56px;padding:0;font-size:24px}
#boot{position:fixed;inset:0;background:var(--bg);z-index:60;display:flex;align-items:center;justify-content:center}
.prog{height:6px;background:#e8e8ed;border-radius:3px;overflow:hidden;margin:14px 0 6px}.prog i{display:block;height:100%;width:0;background:var(--blue);transition:width .15s}
#btnCancel{margin-top:12px;min-width:140px}