优化

src/admin/templets/index.htm

@@ -41,7 +41,7 @@
 					<li class="nav-item d-none d-lg-block">
 						<form action="action_search.php" method="post" target="main">
 							<input type="text" name="keyword" placeholder="功能搜索" class="admin-input-sm ml-3">
-							<button type="submit" class="search"><i class="fa fa-search"></i></button>
+							<button type="submit" class="btn btn-sm search"><i class="fa fa-search"></i></button>
 						</form>
 					</li>
 				</ul>

src/static/web/css/admin.css

@@ -228,12 +228,9 @@ input:focus,select:focus,textarea:focus {
 }
 .admin-head .nav-item .search {
 	position:absolute;
-	top:20px;
-	right:0.25rem;
-	line-height:20px;
-	color:var(--gray);
-	background:0;
-	border:0
+	top:16px;
+	right:0;
+	color:var(--gray)
 }
 .admin-head .nav-link {
 	padding:0 1rem!important