/* Thay Font Awesome 4 (CSS 37KB + font ~77KB) bằng 4 icon SVG đang thực sự dùng trên site:
   fa-phone, fa-envelope (header), fa-envelope-o, fa-facebook (entry-header cũ). */
.fa{display:inline-block;width:1em;height:1em;vertical-align:-.125em;background-color:currentColor;
	-webkit-mask:var(--vln-ico) no-repeat center/contain;mask:var(--vln-ico) no-repeat center/contain}
.fa-phone{--vln-ico:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6.6 10.8a15.1 15.1 0 0 0 6.6 6.6l2.2-2.2a1 1 0 0 1 1-.25 11.4 11.4 0 0 0 3.6.57 1 1 0 0 1 1 1V20a1 1 0 0 1-1 1A17 17 0 0 1 3 4a1 1 0 0 1 1-1h3.5a1 1 0 0 1 1 1c0 1.25.2 2.45.57 3.57a1 1 0 0 1-.25 1z'/%3E%3C/svg%3E")}
.fa-envelope{--vln-ico:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M2 5h20v14H2zm2 2v.5l8 5 8-5V7l-8 5z'/%3E%3C/svg%3E")}
.fa-envelope-o{--vln-ico:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M2 5h20v14H2zm2 2v10h16V7l-8 5zm1.5 0L12 11l6.5-4z'/%3E%3C/svg%3E")}
.fa-facebook{--vln-ico:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M14 8V6c0-.6.4-1 1-1h2V1h-3a5 5 0 0 0-5 5v2H6v4h3v11h5V12h3l1-4z'/%3E%3C/svg%3E")}