方法一：找到functions.php，添加如下代码：
wordpress开启ssl后css无法加载的解
add_filter('script_loader_src', 'agnostic_script_loader_src', 20,2);
function agnostic_script_loader_src($src, $handle) {
return preg_replace('/^(http|https):/', '', $src);
}
add_filter('style_loader_src', 'agnostic_style_loader_src', 20,2);
function agnostic_style_loader_src($src, $handle) {
return preg_replace('/^(http|https):/', '', $src);