header {
  background: #1c3b6a;
    padding-bottom: 30px;
}

.header1 {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  position: relative;
  justify-content: space-between;
}
.log a {
  font-family: Nunito, Nunito;
  font-weight: normal;
  font-size: 36px;
  color: #56ffff;
  line-height: 44px;
}
.header1input {
  margin: 12px 0;

  display: flex;
  width: 450px;

  align-items: center;
  justify-content: space-between;
  border-radius: 100px 100px 100px 100px;
  border: 1px solid #ffffff;
}
#search::placeholder {
  color: white;
  opacity: 1; /* 避免有些浏览器默认降低透明度 */
}
.header1input input {
  margin: 8px 24px;
  font-family: Nunito, Nunito;
  font-weight: 500;
  font-size: 16px;
  color: #56ffff;
  line-height: 16px;
}
.search_btn {
  width: 16px;
  height: 16px;
  color: #56ffff;
  margin: 8px 24px 8px 0;
}

.ullist {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ullist li {
  border-radius: 100px 100px 100px 100px;
  font-family: Nunito, Nunito;
  font-weight: bold;
  font-size: 16px;
  color: #fff;
  line-height: 24px;
  padding: 4px 24px;
  margin: 10px 24px;
}
.ullist li:hover {
  color: #56ffff;
}
.icon-icon-category {
  display: none;
}
.search {
  width: 56px;
  height: 24px;
  background: #ffffff;
  border-radius: 100px 100px 100px 100px;
  box-shadow: 0 2px 0 #fecd44;
  padding: 4px 20px;
  color: #83b293;
  margin: 0 12px;
}
.h5seach {
  display: flex;
}
.h5seach {
  display: none;
}
.icon-search:before {
  color: #fff;
  font-size: 18px;
}
@media (max-width: 1300px) {
  .header1 {
    max-width: 95%;
  }
}

@media (max-width: 1100px) {
  .header1 {
    max-width: 90%;
  }
  .header1input {
    width: 300px;
  }
  .log a {
    font-size: 24px;
    line-height: 28px;
  }
  .icon-icon-category {
    right: 0;
    position: absolute;
  }
  .icon-icon-category:before {
    font-size: 20px;
    color: #fff;
  }
  .icon-icon-category {
    display: block;
  }
}

/* 返回顶部 */
.back-to-top {
  border: none;
  background: none;
  position: fixed;
  right: 100px;
  font-size: 24px;
  line-height: 40px;
  bottom: 200px;
  display: none;
}

@media (max-width: 768px) {
  .h5seach {
    display: block;
    display: flex;
  }
  .icon-search:before {
 
    font-size: 16px;
  }.header1input input {
    margin: 8px 12px;
  
}

  .ullist {
    width: 95%;
  
    justify-content: flex-start;
    overflow-x: auto;
        overflow-y: hidden;
        white-space: nowrap;
        -ms-overflow-style: none;
        scrollbar-width: none;
  }
  header {
  
    padding-bottom: 18px;
}
}
@media (max-width: 766px) {
  .back-to-top {
    right: 30px;
  }
  .icon-search:before {
   
    font-size: 18px;
  }
  .log a {
     font-size: 16px;
    line-height: 24px;
  }
  .header1input {
    width: 196px;
  }
  .header1input input {
    margin: 0px 0px 0px 14px;
    font-size: 12px;
    line-height: 16px;
    width: 70%;
  }
  .ullist li {
    font-size: 14px;
    line-height: 18px;
    padding: 0px 22px;
    margin: 6px 0px;
  }

  .search_btn {
    margin: 4px 24px 4px 0;
  }
}