html - Why is there a faint border around the photo? -

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i adding content page: http://rouviere.com/index-new , reason there faint border around inset photo in top section.

here html:

<div class="illustration">     <img class="promo" src="http://www.rouviere.com/_photos/slides_photos.jpg" alt="we package up" /> </div><!-- end #illustration -->  <div class="headline">     <h2>photos</h2> <p id="sub-head">show magic of world fine photos</p> </div>

here css:

p#sub-head  { font-size: 24px; margin: 0 0 10px 35px; color: #000; } img.promo   { float: right; margin-right: 20px; z-index: 0;   }

i tried adding border: none; image didn't make difference.

i appreciate guidance towards solution.

thanks.

the border on image itself.

enter image description here


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