Problem creating child theme

Hi,

I’m trying to create a child theme for the twentythirteen theme, and am doing something wrong but I can’t see what.

I have created a folder in wp-content called twentythirteen-child. In that folder I have two files: style.css and functions.php.

styles.css contains the following code:

/*
Theme Name: Twenty Thirteen Child
Theme URI: https://ww.wp.xz.cn/themes/twentythirteen/
Author: the WordPress team
Author URI: https://ww.wp.xz.cn/
Description: The 2013 theme for WordPress takes us back to the blog, featuring a full range of post formats, each displayed beautifully in their own unique way. Design details abound, starting with a vibrant color scheme and matching header images, beautiful typography and icons, and a flexible layout that looks great on any device, big or small.
Version: 1.6
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Tags: black, brown, orange, tan, white, yellow, light, one-column, two-columns, right-sidebar, fluid-layout, responsive-layout, custom-header, custom-menu, editor-style, featured-images, microformats, post-formats, rtl-language-support, sticky-post, translation-ready, accessibility-ready
Template: twentythirteen
Text Domain: twentythirteen-child

This theme, like WordPress, is licensed under the GPL.
Use it to make something cool, have fun, and share what you've learned with others.
*/

And functions.php contains the following:

add_action( 'wp_enqueue_scripts', 'theme_enqueue_styles' );
function theme_enqueue_styles() {
wp_enqueue_style( 'twentythirteen-css', get_template_directory_uri() . '/style.css' );
}

Everything I’ve read seems to indicate that this is what I should do, and when I view my themes in the Dashboard the Twenty Thirteen Child is showing up, but without any styling. If I do a ‘Live Preview’, it displays with no styling at all – it’s not picking up the stylesheet from its parent.

I’ve gone over and over this, and checked various websites with instructions on how to do this, and I can’t see what’s gone wrong.

(I also tried doing it with the Child Theme Wizard plugin – that works, but it uses @import to bring in the parent styles, which I’ve read is no longer used, so I’m trying to stay away from that).

Any help very much appreciated!

WP.