.exercise_content { width:1000px; margin:0 auto;padding:0; font-size:14px;}
.exercise_content .exercise_middle { background:url(images/exercise_middle.gif) repeat-y; width:100%;}
.exercise_content .exercise_middle .exercise_middle_container { width:970px; margin:0 auto;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_top 
{background:url(images/exercise_top_bg.gif) no-repeat; width:970px; height:54px; font-size:14px;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_time 
{ background:url(images/exercise_middle_middle.gif) no-repeat; width:970px; height:85px; padding-left:150px; line-height:30px;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_time .p1 { padding-top:20px;padding-bottom:8px;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_left 
{background:url(images/exercise_middle_left.gif) no-repeat; width:480px; height:266px; float:left; text-align:center;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_left .exercise_middle_left_send { width:60%; padding:20px 0 0 140px;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_left .exercise_middle_left_send  li
{ font-size:18px; font-family:"微软雅黑"; font-weight:bold; color:#3b3b3b; text-align:left; border-bottom:1px dotted #333;line-height:38px; background:url(images/star.png) no-repeat 0 12px; list-style:none; padding-left:18px;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_left table { width:80%; margin:0 auto; padding:10px 0 0 10px; line-height:20px;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_right {background:url(images/exercise_middle_right.gif) no-repeat; width:480px; height:266px; float:left;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_right table { width:460px; margin:0 auto; padding:18px 0 0 90px; line-height:20px; float:left;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_bottom p{ margin:10px 0 14px 0;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_button p img { margin-bottom:4px;}
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_button p a:link {color: #f4f4f4;}		/* 未访问的链接 */
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_button p a:visited {color: #f4f4f4;}	/* 已访问的链接 */
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_button p a:hover {color: #f4f4f4;}	/* 鼠标移动到链接上 */
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_button p a:active {color: #f4f4f4;}	/* 选定的链接 */
.exercise_content .exercise_middle .exercise_middle_container .exercise_middle_bottom_synopsis { font-size:12px; line-height:22px; border-top:1px solid #ccc;}
.exercise_content .exercise_bottom { background-image:url(images/exercise_bottom.gif); width:100%; height:20px;}
.clear {clear:both;}