/* ===== 箭头 ===== */
.arrow {
position: fixed;
z-index: 3;
pointer-events: none;
filter: drop-shadow(0 0 8px rgba(255,90,190,0.9)) drop-shadow(0 0 18px rgba(120,240,255,0.6));
animation: arrowPulse 1.6s ease-in-out infinite;
}
@keyframes arrowPulse {
0%,100% { transform: translate(var(--tx,0), var(--ty,0)) scale(1); opacity: 0.85; }
50% { transform: translate(var(--tx,0), var(--ty,0)) scale(1.14); opacity: 1; }
}
/* 像素风箭头本体（用 SVG 画，见下方 HTML） */
.arrow svg { display: block; }