/* 日语与木牌完全来自原图，日景静止时点击层透明。 */
.love-sign{position:absolute;left:var(--sign-left);top:var(--sign-top);width:44px;height:44px;transform:translate(-50%,-50%) scale(var(--sign-scale));transform-origin:center}
.love-sign #heart{width:44px;height:44px;display:grid;place-items:center;padding:0;border:0;background:none;cursor:pointer;touch-action:manipulation}
.heart-glyph{display:block;width:24px;height:22px;background:#a52d1c;clip-path:polygon(50% 96%,9% 58%,2% 36%,6% 15%,22% 4%,38% 7%,50% 21%,62% 7%,78% 4%,94% 15%,98% 36%,91% 58%);opacity:0;transform-origin:center}
.heart-glyph.beat{animation:sign-heartbeat .6s ease-in-out 3}
.love-sign #heart:focus-visible{outline:2px solid #fff0c0;outline-offset:1px;border-radius:50%}
.love-sign.detached{left:auto;top:auto;right:24px;bottom:max(8%,env(safe-area-inset-bottom));transform:none}
.love-sign.detached .heart-glyph{opacity:.85;background:#efb0a8}
@keyframes sign-heartbeat{0%{transform:scale(1);opacity:0}20%{opacity:.95}35%{transform:scale(1.38);opacity:.65}65%{transform:scale(.96);opacity:.95}82%{transform:scale(1.16);opacity:.8}100%{transform:scale(1);opacity:0}}
@media(prefers-reduced-motion:reduce){.heart-glyph.beat{animation:none}}