/* 设置根字体大小(rem基准) */
html {
  font-size: 18px;
}
@media screen and (max-width: 1714.28571429px) {
  html {
    font-size: calc(100vw * 10 / 1200px * 0.7);
  }
}
.center {
  width: 65%;
  max-width: 1200px;
  min-width: 780px;
  margin: 0 auto;
  box-sizing: border-box;
  /* 响应式处理 */
  transition: width 0.3s ease-in-out;
}
@media screen and (max-width: 1200px) {
  .center {
    width: 80%;
    min-width: unset;
  }
}
@media (max-width: 630px) {
  html,
  body {
    min-width: 630px;
    overflow-x: auto;
  }
}
/* 可选：添加CSS层面的限制（与JavaScript中的min/max对应） */
html {
  font-size: clamp(12px, 1.6vw, 20px);
  /* 作为备用方案 */
}
.body {
  width: 100%;
  background-color: #fff;
}
.crumbs-box {
  width: 100%;
  background-color: #d9d9d9;
}
.crumbs {
  height: 2.22222222rem;
  color: #333333;
  font-size: 0.77777778rem;
  line-height: 2.22222222rem;
}
.crumbs i {
  color: #a1a1a1;
  margin-left: 0.55555556rem;
  margin-right: 0.55555556rem;
}
.crumbs a:hover {
  color: #c3272b;
}
.cate-title {
  height: 4.66666667rem;
  line-height: 4.66666667rem;
  margin-top: 1.44444444rem;
  padding-left: 2.22222222rem;
  font-size: 1.11111111rem;
  box-sizing: border-box;
  background: url(../img/catetitle.jpg) no-repeat;
  background-size: auto auto;
  color: #fff;
}
.knowledge {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  margin-top: 1.83333333rem;
  padding-top: 0rem;
  padding-right: 2.22222222rem;
  padding-bottom: 1.11111111rem;
  padding-left: 2.22222222rem;
  box-sizing: border-box;
}
.konw-item {
  width: 24%;
  margin-right: 1.3%;
  margin-bottom: 1.11111111rem;
}
.konw-item .content {
  position: relative;
  width: 100%;
  height: 9.72222222rem;
  border-radius: 0.44444444rem;
  margin-bottom: 1.27777778rem;
  background-image: url(../img/baike.jpg);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  color: #fff;
}
.konw-item .content .know-logo {
  margin-left: 0.83333333rem;
  line-height: 3.61111111rem;
  height: 3.61111111rem;
  font-size: 0.77777778rem;
}
.konw-item .content .know-logo i {
  font-size: 1rem;
}
.konw-item .content .know-logo span {
  font-weight: bold;
}
.konw-item .content .con-name {
  text-align: center;
  line-height: 3.05555556rem;
  font-size: 0.88888889rem;
  font-weight: bold;
}
.konw-item .content .type {
  position: absolute;
  right: 0.27777778rem;
  bottom: 0.27777778rem;
  background-color: #a4a8cb;
  width: 3.66666667rem;
  height: 1.11111111rem;
  font-size: 0.66666667rem;
  color: #fff;
  border-radius: 0.55555556rem;
  text-align: center;
  line-height: 1.11111111rem;
}
.konw-item .name {
  width: 100%;
  height: 1.55555556rem;
  font-size: 0.88888889rem;
  line-height: 1.55555556rem;
  color: #333333;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.konw-item .addtime {
  font-size: 0.55555556rem;
  line-height: 1.11111111rem;
  color: #999999;
}
.konw-item:nth-of-type(4n) {
  margin-right: 0;
}