.header {
  height: 60px;
  position: sticky;
  top: 0;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(1.8) blur(5px);
  border-bottom: 1px solid #eaeaea;
  margin-bottom: 20px;
  padding: 0 12px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
}

#clock {
  display: inline-block;
  font-size: 24px;
  font-family: "楷体";
  padding: 12px;
  border-radius: 12px;
  background-color: #efeeee;
  user-select: none;
  box-shadow: 12px 12px 12px -6px rgba(0, 0, 0, 0.15),
    inset 6px 6px 8px rgba(255, 255, 255, 0.75),
    -6px -6px 15px rgba(255, 255, 255, 0.55),
    inset -1px -1px 4px rgba(0, 0, 0, 0.2);
  border: 1px solid #efeeee;
}

.main {
  width: 1120px;
  margin: 0 auto;
}

.main .box {
  background-color: #efeeee;
  box-sizing: border-box;
  padding: 20px;
  margin-bottom: 20px;
}

.box .title {
  font-size: 0px;
  color: #666;
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.box .title span {
  font-size: 18px;
  margin-left: 5px;
}

.box .content {
  display: flex;
  flex-wrap: wrap;
}

.box .content .item {
  width: 72px;
  height: 72px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 10px;
  box-shadow: 10px 10px 16px rgba(0, 0, 0, 0.2),
    -10px -10px 16px rgba(255, 255, 255, 1);
  transition: all 0.2s ease-out;
  margin-right: 40px;
  margin-bottom: 20px;
}

.box .content .item:nth-child(10n) {
  margin-right: 0;
}

.box .content .item img {
  width: 32px;
  transition: all 0.2s ease-out;
}

.box .content .item:hover {
  cursor: pointer;
  box-shadow: 0 0 0 rgba(0, 0, 0, 0.2),
    0 0 0 rgba(255, 255, 255, 0.8),
    inset 10px 10px 16px rgba(0, 0, 0, 0.1),
    inset -10px -10px 16px rgba(255, 255, 255, 1);
}

.box .content .item:hover img {
  width: 30px;
}

.footer {
  height: 50px;
  background-color: #000;
  color: #fff;
  line-height: 50px;
  font-size: 18px;
  text-align: center;
  user-select: none;
}