时间轴组件

<!-- Main node for this component -->
<div class="timeline">
  <!-- Timeline time label -->
  <div class="time-label">
    <span class="bg-green">23 Aug. 2019</span>
  </div>
  <div>
  <!-- Before each timeline item corresponds to one icon on the left scale -->
    <i class="fas fa-envelope bg-blue"></i>
    <!-- Timeline item -->
    <div class="timeline-item">
    <!-- Time -->
      <span class="time"><i class="fas fa-clock"></i> 12:05</span>
      <!-- Header. Optional -->
      <h3 class="timeline-header"><a href="#">Support Team</a> sent you an email</h3>
      <!-- Body -->
      <div class="timeline-body">
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        quora plaxo ideeli hulu weebly balihoo...
      </div>
      <!-- Placement of additional controls. Optional -->
      <div class="timeline-footer">
        <a class="btn btn-primary btn-sm">Read more</a>
        <a class="btn btn-danger btn-sm">Delete</a>
      </div>
    </div>
  </div>
  <!-- The last icon means the story is complete -->
  <div>
    <i class="fas fa-clock bg-gray"></i>
  </div>
</div>