.timeline {
 list-style: none;
 padding: 20px 0 20px;
 position: relative;
}

.timeline:before {
 top: 0;
 bottom: 0;
 position: absolute;
 content: " ";
 width: 3px;
 background-color: #eeeeee;
 left: 50%;
 
 margin-left: -1.5px;
}

.timeline > li {
 margin-bottom: 20px;
 position: relative;
}

.timeline > li:before,
.timeline > li:after {
 content: " ";
 display: table;
}

.timeline > li:after {
 clear: both;
}

.timeline > li:before,
.timeline > li:after {
 content: " ";
 display: table;
}

.timeline > li:after {
 clear: both;
}

.timeline > li > .timeline-panel {
 width: 46%;
 float: left;
 border: 1px solid #d4d4d4;
 border-radius: 2px;
 padding: 20px;
 position: relative;
 -webkit-box-shadow: 0 1px 6px rgba(0, 0, 0, 0.175);
 box-shadow: 0 1px 6px rgba(0, 0, 0, 0.175);
 
}

.timeline > li > .timeline-panel:before {
 position: absolute;
 top: 26px;
 right: -15px;
 display: inline-block;
 border-top: 15px solid transparent;
 border-left: 15px solid #ccc;
 border-right: 0 solid #ccc;
 border-bottom: 15px solid transparent;
 content: " ";
 
}

.timeline > li > .timeline-panel:after {
 position: absolute;
 top: 27px;
 right: -14px;
 display: inline-block;
 border-top: 14px solid transparent;
 border-left: 14px solid #fff;
 border-right: 0 solid #fff;
 border-bottom: 14px solid transparent;
 content: " ";
}

.timeline > li > .timeline-badge {
 color: #fff;
 width: 50px;
 height: 50px;
 line-height: 50px;
 font-size: 1.4em;
 text-align: center;
 position: absolute;
 top: 16px;
 left: 50%;
 margin-left: -25px;
 background-color: #999999;
 z-index: 100;
 border-top-right-radius: 50%;
 border-top-left-radius: 50%;
 border-bottom-right-radius: 50%;
 border-bottom-left-radius: 50%;
}

.timeline > li.timeline-inverted > .timeline-panel {
 float: right;
}

.timeline > li.timeline-inverted > .timeline-panel:before {
 border-left-width: 0;
 border-right-width: 15px;
 left: -15px;
 right: auto;
}

.timeline > li.timeline-inverted > .timeline-panel:after {
 border-left-width: 0;
 border-right-width: 14px;
 left: -14px;
 right: auto;
}

.timeline-badge.primary {
 background-color: #2e6da4 !important;
}

.timeline-badge.success {
 background-color: #3f903f !important;
}

.timeline-badge.warning {
 background-color: #f0ad4e !important;
}

.timeline-badge.danger {
 background-color: #d9534f !important;
}

.timeline-badge.info {
 background-color: #5bc0de !important;
}

.timeline-title {
 margin-top: 0;
 color: inherit;
}

.timeline-body > p,
.timeline-body > ul {
 margin-bottom: 0;
}

.timeline-body > p + p {
 margin-top: 5px;
}

@media (max-width: 767px) {
 ul.timeline:before {
 left: 40px;
 }

 ul.timeline > li > .timeline-panel {
 width: calc(100% - 90px);
 width: -moz-calc(100% - 90px);
 width: -webkit-calc(100% - 90px);
 
 }

 ul.timeline > li > .timeline-badge {
 left: 15px;
 margin-left: 0;
 top: 16px;
 }

 ul.timeline > li > .timeline-panel {
 float: right;
 }

 ul.timeline > li > .timeline-panel:before {
 border-left-width: 0;
 border-right-width: 15px;
 left: -15px;
 right: auto;
 }

 ul.timeline > li > .timeline-panel:after {
 border-left-width: 0;
 border-right-width: 14px;
 left: -14px;
 right: auto;
 }
}


<ul class="timeline">
<li>
  <div class="timeline-badge"><i class="ion-leaf"></i></div>
  <div class="timeline-panel" style="width: 46%;">
  <div class="timeline-heading">
   <h4 class="timeline-title">安東尼羅賓·簡介</h4>
   <p><small class="text-muted"><i class="glyphicon glyphicon-time"></i></small></p>
  </div>
  <div class="timeline-body">
   <p>他是一位白手起家事業(yè)成功的億萬富翁，是當今最成功的世界級潛能開發(fā)專家；他協(xié)助職業(yè)球隊、企業(yè)總裁、國家元首激發(fā)潛能，渡過各種困境及低潮。曾輔導過多位皇室的家庭成員，被美國前總統(tǒng)克林頓、戴安娜王妃聘為個人顧問；曾為眾多世界名人提供咨詢，包括南非總統(tǒng)曼徳拉、前蘇聯(lián)總統(tǒng)戈爾巴喬夫、世界網球冠軍安德烈•阿加西等；

   </p>
  </div>
  </div>
 </li>
 <li>......................</li>
</ul>

 $(function() {
 $(window).resize(function() {
  initTimePanelSize();
 });
 initTimePanelSize();
 function initTimePanelSize(){
  width = $(this).width();
  //alert(width);
  if (width <= 767) {
   $('div.timeline-panel').width($(this).width() - 90);
  } else {
   $('div.timeline-panel').css('width', '46%');
  }
  }
 });