:root{--ink:#1d2b3a;--panel:#ffffffdb;--accent:#ff7a3d;--safe-top:env(safe-area-inset-top,0px);--safe-right:env(safe-area-inset-right,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--safe-left:env(safe-area-inset-left,0px);color:var(--ink);font-family:ui-rounded,SF Pro Rounded,Segoe UI,PingFang SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}html,body{overscroll-behavior:none;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;background:#bfe0f3;width:100%;height:100%;margin:0;overflow:hidden}#view{touch-action:none;width:100%;height:100%;display:block;position:fixed;inset:0}#hud{pointer-events:none;padding:calc(var(--safe-top) + 10px) calc(var(--safe-right) + 14px) calc(var(--safe-bottom) + 10px) calc(var(--safe-left) + 14px);--hint-cycle:2.4s;position:fixed;inset:0}.hud-top{letter-spacing:.06em;justify-content:center;gap:10px;font-size:14px;font-weight:700;display:flex}.hud-top 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