ถามเรื่อง Mod Rewrite ทำได้แล้ว แต่ทำไม พวก CSS มันหายไปอ่ะครับ

<?php $title="Detail Product";?>
<?php include("header.php");?>
<?php echo $_GET["id"];?>
    <!-- Page Header -->
    <!-- Set your background image for this header on the line below. -->
    <header class="intro-header" style="background-image: url('img/home-bg.jpg')">
		<div class="container_slide">
            <div class="row">
                <div class="col-lg-8 col-lg-offset-2 col-md-10 col-md-offset-1">
                    <div class="site-heading">
                        <h1></h1>
                        <!--<hr class="small">-->
                        <span class="subheading"></span>
                    </div>
                </div>
            </div>
		</div>
    </header>

    <!-- Main Content -->
    <div class="container">
		 <div class="col-md-12 portfolio-item">					
					<table border="1" width="100%">
						<tr>
							<td>as</td>
						</tr>
					</table>
                <p>Watch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch DetailWatch Detail</p>
            </div>
    </div>
	<!-- End Content -->

    <hr>

<?php include("footer.php");?>