header .row {
  width: 1200px;
  margin: 0 auto;
}
@media (max-width: 960px) {
  header .row {
    width: 100%;
  }
}
header .row .logo {
  text-align: center;
  line-height: 80px;
  font-size: 26px;
}
header .row .logo a {
  color: #333;
  font-weight: bolder;
  text-decoration: none;
}
body {
  margin: 0;
}
.nav {
  background-color: #008bc7;
}
.nav .row {
  width: 1200px;
  margin: 0 auto;
  /* 使用媒体查询，在屏幕宽度小于等于960px时应用以下样式 */
}
@media (max-width: 960px) {
  .nav .row {
    width: 100%;
  }
}
.nav ul {
  margin: 0;
  padding: 0;
  text-align: center;
  display: grid;
  grid-template-columns: auto auto auto auto auto;
  list-style: none;
  /* 使用媒体查询，在屏幕宽度小于等于960px时调整Grid布局列数 */
}
@media (max-width: 960px) {
  .nav ul {
    grid-template-columns: auto auto auto;
  }
}
.nav ul li {
  position: relative;
  line-height: 50px;
  cursor: pointer;
}
.nav ul li:hover ul {
  opacity: 1;
  visibility: visible;
  display: block;
}
.nav ul li a {
  color: #ffffff;
  text-decoration: none;
  font-weight: 900;
  display: block;
}
.nav ul li:hover,
.nav ul li.hover,
.nav ul li ul li:hover,
.nav ul li ul li.hover {
  background: #0079ad;
}
.nav ul li:hover a,
.nav ul li.hover a,
.nav ul li ul li:hover a,
.nav ul li ul li.hover a {
  color: #ffea52;
}
.nav ul li ul {
  position: absolute;
  left: 0;
  top: 50px;
  width: 100%;
  z-index: 6;
  opacity: 0;
  visibility: hidden;
  overflow: hidden;
  transition: opacity 0.8s;
}
.nav ul li ul li {
  float: none;
  width: 100%;
  background-color: #008bc7;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}
.nav ul li ul li a {
  color: #fff;
}
.nav ul li ul li:hover {
  background-color: #0079ad;
}
.content .row {
  width: 1200px;
  margin: 0 auto;
}
@media (max-width: 960px) {
  .content .row {
    width: 100%;
  }
}
@media (max-width: 960px) {
  .content .row .box {
    padding: 7px;
  }
}
.content .row .single {
  padding: 20px 0;
}
.content .row .caption {
  padding: 30px 0 50px;
  text-align: center;
}
.content .row .caption h3 {
  font-size: 38px;
  font-weight: 600;
}
footer .copyright {
  text-align: center;
  background: #333333;
  padding: 10px 0px;
  color: #ffffff;
}