Hey this is my first post. OK so I have this site and it has a portfolio page. The header image on the main page is different to the header image on the individual portfolio pages. How can I get the sub portfolio pages to have the same header image as the main portfolio page?
Main page
http://nurdit.com/rachelanderson/?page_id=148
Sub Pages
http://nurdit.com/rachelanderson/?portfolio=aeropress-branding-and-print-design
header.php
<body id="index" <?php body_class(); ?>>
<!-- wrapper -->
<div id="wrapper">
<!-- setup vars -->
<?php
$featured_image = wp_get_attachment_image_src( get_post_thumbnail_id(), 'full' );
$header = get_option( 'refinery_header' );
?>
<!-- /setup vars -->
<!-- header -->
<?php if ( $featured_image || $header['image'] ) : ?>
<header id="header" role="header">
<!-- custom header -->
<?php if ( $featured_image && ! is_single() && ! is_home() && ! is_archive() && ! is_search() ) : ?>
<div id="header_image" style="background: url(<?php echo $featured_image[0]; ?>) top center no-repeat;"></div>
<?php else : ?>
<div id="header_image" style="background: url(<?php echo $header['image']; ?>) top center no-repeat;"></div>
<?php endif; ?>
<!-- /custom header -->