body {
  padding-top: 50px;
}
.starter-template {
  padding: 40px 15px;
  text-align: left;
}

/* 自定义导航栏样式 */
.navbar-inverse {
  background-color: #2c3e50; /* 深蓝色 */
  border-color: #1a252f;
}

.navbar-inverse .navbar-brand {
  color: #ecf0f1;
}

.navbar-inverse .navbar-brand:hover,
.navbar-inverse .navbar-brand:focus {
  color: #fff;
}

.navbar-inverse .navbar-nav > li > a {
  color: #bdc3c7;
}

.navbar-inverse .navbar-nav > li > a:hover,
.navbar-inverse .navbar-nav > li > a:focus {
  color: #fff;
  background-color: #34495e;
}

.navbar-inverse .navbar-nav > .active > a,
.navbar-inverse .navbar-nav > .active > a:hover,
.navbar-inverse .navbar-nav > .active > a:focus {
  color: #fff;
  background-color: #34495e;
}

.timeline {
  position: relative;
  margin: 50px 0;
  padding-left: 50px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #333;
}

.timeline-item {
  position: relative;
  margin-bottom: 30px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -54px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #333;
}

.timeline-date {
  font-weight: bold;
  margin-right: 15px;
}

.timeline-content {
  display: inline-block;
}