Comment form: css-changes on textfield and submitbutton don't have an effect

Hey all!

I changed the styling from the comment form. In my testing environment (cloned subdomain-site) it works fine. Contrary to the main-site, where the same code makes partly effects only. Strictly speaking the changes on the textfield and submit-button (“P.comment-form-comment” and “INPUT#submit.submit” -> firebugs labelling for those concerned parts) don’t have an effect (changes regarding “H3#reply-title.comment-reply-title” and “H3#reply-title.comment-reply-title” work).

Loading a new style.css and refreshing did’nt work. Fruitless use of firefox’ debugger.

Does anyone have an idea what could make the difference to the main site, where to look at?

(btw: no worries I’m using child themes ??

/* Comment Form */

#respond {
margin: 5% 0;
}
#respond textarea#comment {
    height:70px;
}
#comments {
     display: inline-block;
     clear: both;
     width: 100%;
     font-size: 13px;
}
ol.commentlist {
     padding: 0;
     margin: 5% 0;
     list-style-type: none;
}
ul.children {
     list-style-type: none;
     padding-left: 5%;
}

article.comment {
     margin: 5% 0;
     padding-left: 80px;
}
.children article.comment {
     padding-left: 60px;
}

.comment footer { font-size: 0.8em; }

.comment p {
     margin: 0.25em 0;
     line-height: 1.2;
     color: #000;
     font-family: "Arial Black", "Arial Bold", Gadget, sans-serif;
letter-spacing: 0.02em;
}
img.avatar {
     float: left;
     position: absolute;
     margin-left: -80px;
}
.children article.comment img.avatar {
     margin-left: -60px;
}

.form-allowed-tags {
     display: none;
}
#reply-title {
	color: #a3b200;
	font-size: 18px;
    font-weight: bold;
letter-spacing: 0.02em;
	line-height: 30px;
}
#commentform label {
     display: none;
}
p.comment-subscription-form {
     clear: both;
}

.comment-subscription-form label {
     display: inline-block !important;
}
input#subscribe_comments {
     padding: 0!important;
     margin: 0!important;
     margin-right: 0.5em!important;
     float: none !important;
}
#commentform p {margin: 0; }
#commentform input, #commentform textarea {
     width: 95%;
     padding: 2.5%;
     background: #f7f7f7;
     border: none;
     margin: 2% 0;
     font-size: 14px;
     border-bottom: 2px dashed #d7d7d7;
     font-family: "Arial Black", "Arial Bold", Gadget, sans-serif;
letter-spacing: 0.02em;
}

#commentform input#submit, .button {
     color: #fff;
     border: none !important;
     background: #a3b200;
     -webkit-appearance: none;
}
#commentform input#submit:hover, .button:hover {
     background: #b7b400;
}
#commentform input#submit:active, .button:active {
     background: #b7b400;
}

@media ( min-width: 700px ) {
     #commentform input {
          width: 25%;
          float: left;
     }
     .comment-form-author input, .comment-form-email input {
          margin-right: 5% !important;
     }
}

@media ( max-width: 700px ) {
     #commentform input#submit {
          width: 100%!important;
     }
}