responsive child theme isn't working

Utterly stumped as the same process I’ve used four times for making a child theme doesn’t seem to be working. Specifically, the child theme itself seems to work, but the new CSS styles are not getting overwritten. It’s as if the browser doesn’t read anything after importing the main responsive CSS file. Completely baffled.

Here’s my CSS:

/*
Theme Name:     Responsive Child
Theme URI:      http://www.electronicadownload.com/
Description:    Child theme for the Responsive theme
Author:         ElecDown
Author URI:     http://www.electronicadownload.com/
Template:       responsive
Version:        0.1.0
*/

@import url("../responsive/style.css");

body { background-color: #000000;}