效果图：

以下代码放到你的菜单

<span class="meihua">你的菜单名称</span>

以下代码放入css样式

/*导航菜单美化开始*/
.meihua {
background: linear-gradient(90deg, rgba(131, 58, 180, 1) 0%, rgba(253, 29, 29, 1) 33.3%, rgba(252, 176, 69, 1) 66.6%, rgba(131, 58, 180, 1) 100%);
-webkit-background-clip: text;
color: transparent !important;
background-size: 300% 100%;
animation: text 4s infinite linear
}
@media (max-width:768px) {
span.ua-info {
display: none
}
.comment-author .user-title {
width: 40% !important
}
}
.comment-author .user-title {
font-size: 13px;
background: linear-gradient(90deg, rgba(131, 58, 180, 1) 0%, rgba(253, 29, 29, 1) 33.3%, rgba(252, 176, 69, 1) 66.6%, rgba(131, 58, 180, 1) 100%);
-webkit-background-clip: text;
color: transparent !important;
background-size: 300% 100%;
animation: text 4s infinite linear
}
@keyframes text {
0% {
background-position: 0 0
}
100% {
background-position: -150% 0
}
}
.b2-qr-code-fill {
background: linear-gradient(90deg, rgba(131, 58, 180, 1) 0%, rgba(253, 29, 29, 1) 33.3%, rgba(252, 176, 69, 1) 66.6%, rgba(131, 58, 180, 1) 100%);
-webkit-background-clip: text;
color: transparent !important;
background-size: 300% 100%;
animation: text 4s infinite linear
}
/*导航菜单美化结束*/

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