所以无缘无故由标题背景图像停止工作。它根本不显示任何内容。我花了一个小时调试，但什么也找不到。我查看了“网络”选项卡，可以看到唯一的徽标。svg被加载，而不是bg。jpg。希望你能发现一些东西。以下是一些代码：
标题。php
<?php
/**
* The header for our theme
*
* This is the template that displays all of the <head> section and everything up until <div id="content">
*
* @link https://developer.wordpress.org/themes/basics/template-files/#template-partials
*
* @package okindk
*/
?>
<!doctype html>
<html <?php language_attributes(); ?>>
<head>
<meta charset="<?php bloginfo( \'charset\' ); ?>">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="profile" href="http://gmpg.org/xfn/11">
<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<?php wp_head(); ?>
<?php include \'includes/costumizer.php\'; ?>
</head>
<body <?php body_class(); ?>>
<div id="page" class="site">
<a class="skip-link screen-reader-text" href="#content"><?php esc_html_e( \'Skip to content\', \'okindk\' ); ?></a>
<header id="masthead masthead_custom" class="site-header">
<nav id="site-navigation" class="main-navigation">
<button class="menu-toggle" aria-controls="primary-menu" aria-expanded="false"><?php esc_html_e( \'Primary Menu\', \'okindk\' ); ?></button>
<?php
wp_nav_menu( array(
\'theme_location\' => \'menu-1\',
\'menu_id\' => \'primary-menu\',
) );
?>
<div id="logo">
</div>
</nav><!-- #site-navigation -->
</header><!-- #masthead -->
<div id="content" class="site-content">
还有其他风格。css
#masthead_custom {
background-image: url("./bg.jpg");
background-color: #444;
height: 100vh;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
opacity: 0.6;
position: relative;;
z-index: 999999;
}
