Target a css class inside another css class

Hi I am having problems with some css classes in joomla. I have two divs in a module, one is the wrapper class="wrapper", the other is the content class="content" . Content is inside wrapper. What I am trying to do is target a css style on the content class. Usually I would just put .content {my style info} in the style sheet, but the problem is that this class is used several times throughout the page. So in the backend, you can assign a module a class name, so I have called this one .testimonials .

So that I dont alter all the other content classes on the page I am trying to target it by putting this :

.testimonials .content {my style info I am trying to apply} 

but it is not working, I know you can do this with divs, so

#testimonials .content {my style info I am trying to apply} 

but my question is can this be done with classes ?, if so something is going wrong as I am trying to use the following :

.testimonials .content {font-size:12px; width:300px !important;}

as for some reason the content is not wrapping and just vanishes off the page at the end of the paragraph, so I am trying to make sure the 1st level class the content is sitting is not overlapping anything, the odd thing is even if I fix the div class the content sits in to 50px it still wont wrap the text, so I am not sure if I am targeting it right ?.

edit >>>>>>>>>>..

The html Joomla is creating basically looks like this >>

<div class="wrapper">
<div class="content">SOME CONTENT</div>
</div>

then it is wrapped in a million other divs in the good old Joomla style.

I have given the module the class of testimonials, so it ends up looking something like :

<div class="testimonials">
 <div class="wrapper">
  <div class="content">SOME CONTENT</div>
 </div>
</div>

EDIT 3 >>>>>>> OK, this is what it is spitting out

<div class="testimonials">
   <div class="key4-block">
      <div class="module-title"><h2 class="title">Client Testimonials</h2></div>
         <div class="key4-module-inner">
            <div class="module-content">                                
               <script type="text/javascript">
                 RokStoriesImage['rokstories-184'].push('');
                 RokStoriesImage['rokstories-184'].push('');
                 RokStoriesImage['rokstories-184'].push('');
            </script>
         <div id="rokstories-184" class="rokstories-layout6 content-left"  >
           <div class="feature-block">        
            <div class="feature-wrapper">
              <div class="feature-container">
                 <div class="feature-story">
                    <div class="image-full" style="float: right">
                        <img src="/sos/" alt="image" />                            
                    </div>
                    <div class="desc-container">
                        <div class="wrapper">                                                        
                           <span class="content"><p>Arrived in under 30 mins and got my pride and joy home in one piece, the day it conked out on me.</p>
                           <p>- Mr A Another</p></span>                                
                        </div>
                    </div>
                </div>
                <div class="feature-story">
                   <div class="image-full" style="float: right">
                      <img src="/sos/" alt="image" />                            
                   </div>
                   <div class="desc-container">        
                      <div class="description">                                                        
                         <span class="feature-desc">
                            <p>Great Service ! , SOS came to the rescue me in no time at all and made my day.</p>
    <p>- a customer</p>
                          </span>                                
                      </div>
                   </div>
                </div>
              </div>
           </div>
        </div>
      </div>

EDIT 4 >>>>>>

This is what it is doing

Not certain what the HTML looks like (that would help with answers). If it's

<div class="testimonials content">stuff</div>

then simply remove the space in your css. A la...

.testimonials.content { css here }

UPDATE:

Okay, after seeing HTML see if this works...

.testimonials .wrapper .content { css here }

or just

.testimonials .wrapper { css here }

or

.desc-container .wrapper { css here }

all 3 should work.

I use div instead of tables and am able to target classes within the main class, as below:

CSS

.main {
    .width: 800px;
    .margin: 0 auto;
    .text-align: center;
}
.main .table {
    width: 80%;
}
.main .row {
   / ***something ***/
}
.main .column {
    font-size: 14px;
    display: inline-block;
}
.main .left {
    width: 140px;
    margin-right: 5px;
    font-size: 12px;
}
.main .right {
    width: auto;
    margin-right: 20px;
    color: #fff;
    font-size: 13px;
    font-weight: normal;
}

HTML

<div class="main">
    <div class="table">
        <div class="row">
            <div class="column left">Swing Over Bed</div>
            <div class="column right">650mm</div>
            <div class="column left">Swing In Gap</div>
            <div class="column right">800mm</div>
        </div>
    </div>
</div>

If you want to style a particular "cell" exclusively you can use another sub-class or the id of the div e.g:

.main #red { color: red; }

<div class="main">
    <div class="table">
        <div class="row">
            <div id="red" class="column left">Swing Over Bed</div>
            <div class="column right">650mm</div>
            <div class="column left">Swing In Gap</div>
            <div class="column right">800mm</div>
        </div>
    </div>
</div>

.parentClass {
      background:green;
      padding:20px:
}
.parentClass>.childClass {
      background:pink;
      padding:10px;
      margin:10px;
}

<div class="parentClass">
   Donec a sem pharetra, ultricies ipsum id
   <div class="childClass">
     Lorem ipsum dolor sit amet consectetur
   </div>
   Donec a sem pharetra, ultricies ipsum id
</div>