/* Keep each host button's existing size and style; only add the LINE-green mark. */
.line-contact::before{content:"";display:inline-block;width:1.25em;height:1.25em;margin-inline-end:.4em;vertical-align:middle;background:center/contain no-repeat url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath fill='%2306C755' d='M20 2C9 2 1 9 1 18c0 8 7 14 16 16l-1 5c0 1 1 1 2 0 7-4 21-13 21-21C39 9 31 2 20 2Z'/%3E%3Ctext x='20' y='22' text-anchor='middle' fill='white' font-family='sans-serif' font-weight='bold' font-size='11'%3ELINE%3C/text%3E%3C/svg%3E")}