I've set up a localhost installation of CiviCRM on top of Wordpress, using the Debian unstable packages. The Wordpress version is 4.7.2 and the CiviCRM Wordpress plugin version is 4.7.14.
* help buttons <a class="helpicon"> * expand tab buttons <div class="crm-accordion-header"> * slider buttons <span class="btn-slide crm-hover-button">
Other UI elements work just fine. I've tried disabling my ad blocker, and opening a private tab to rule out browser extensions.
Any thoughts on what might be going wrong or other things to check?