Open ../goodstore/header.php and this code

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0" />

replace by this:

<meta name="viewport" content="width=1366" />

And into Theme Options -> Custom Code -> Custom CSS add this:

.container{width: 1366px !important;}
@-ms-viewport{width: 1366px;}

Result: