解决元素被上方元素覆盖时无法点击的问题

pointer-events: none;

/* Keyword values */
pointer-events: auto;
pointer-events: none;
pointer-events: visiblePainted; /* SVG only */
pointer-events: visibleFill;    /* SVG only */
pointer-events: visibleStroke;  /* SVG only */
pointer-events: visible;        /* SVG only */
pointer-events: painted;        /* SVG only */
pointer-events: fill;           /* SVG only */
pointer-events: stroke;         /* SVG only */
pointer-events: all;            /* SVG only */
/* Global values */
pointer-events: inherit;
pointer-events: initial;
pointer-events: unset;

参考链接