.u_main-wrapper {
  max-width: 1200px;
  margin: 60px auto auto auto;
}
.main {
  margin: 10px;
}
.main-col {
  float: left;
  width: 33%;
}
.main-block {
  margin: 10px 5px 5px 5px;
  padding: 10px;
  background-color: white;
}
.block-title {
  display: block;
  margin: 5px auto 10px 15px;
  font-size: 18px;
  color: #337ab7;
}
.block-grid {
  position: relative;
  float: left;
  width: 33%;
  text-align: center;
  height: 120px;
}
.block-grid > a {
  display: block;
  color: #666;
}
.grid-title {
  display: block;
  color: #333;
}
.grid-icon {
  display: block;
  font-size: 3.33em;
}
.block-grid.new::before {
  content: "new";
  position: absolute;
  top: -1em;
  right: 0;
  font-size: 0.75em;
  padding: 0 0.5em;
  border-radius: 1000px;
  background-color: #777;
  color: #fff;
}

/* 矢量图标 */
:root {
  --fa-primary-opacity: 0.8;
}
.fas,
.far,
.fal,
.fab {
  opacity: 0.8;
}
.icon {
  position: relative;
  top: 10px;
  display: inline-block;
  width: 50px;
  height: 50px;
  stroke-width: 0;
  stroke: currentColor;
  fill: currentColor;
}
.footer {
  margin: 20px;
  font-size: 14px;
  color: #777;
}
.footer > a {
  color: #337ab7;
}
@media (max-width: 1000px) {
  .u_main-wrapper {
    margin: 100px auto auto auto;
  }
  .main-col {
    width: 100%;
  }
}