Добавить в шаблоны, exstra.less этот код:
CSS:
.p-header-logo.p-header-logo--image a:before {
content: "xnForo.ir"; /* enter your text */
background: linear-gradient(to right, #c4302b, #c4302b, #f2f3f4, #f2f3f4);
background-size: 400% 400%;
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
-webkit-animation: rainbow 20s ease infinite;
animation: rainbow 20s ease infinite;
font-weight: bold;
line-height: 25px;
animation: AnimNic 6s ease infinite...