@charset "utf-8";
.pss_topics-banner {
  background: url(banner-pc-theme.jpg) no-repeat;
  height: 39rem;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  overflow: unset;
}
.topics-logo-box {
  margin-top: 0;
  width: 375px;
  height: 87px;
}
.topics-logo-box img {
  width: 100%;
  margin: 1rem 0;
}
.topics-name-box {
  color: #fff;
  margin-top: 1.5rem;
  width: 375px;
  text-align: center;
}
.topics-name-box > dt {
  font-size: 2.5rem;
  color: #c3d7ff;
}
.topics-name-box > dd {
  font-size: 5rem;
  font-weight: bold;
}
.pss_topics-items {
  padding-bottom: 2rem;
}
.pss_topics-item {
  width: 48%;
  height: 400px;
}
.pss_topics-item > dt {
  height: 116px;
  font-size: 36px;
  line-height: 116px;
  box-sizing: border-box;
  color: #fff;
  font-weight: bold;
  padding-left: 1em;
  border-radius: 1rem 1rem 0 0;
}
.topics-item-1 {
  width: 56%;
}
.topics-item-1 > dt {
  background: url(wyk-banner.png) 0 0 no-repeat;
  background-size: 100% 100%;
}
.pss_topics-item > dt img {
  height: 80%;
  float: right;
  opacity: 0.55;
  margin-right: 0.5rem;
  margin-top: 1rem;
}
.topics-item-2 > dt img {
  height: 90%;
  margin-top: 0.5rem;
}
.topics-item-2 {
  width: 42%;
}
.topics-item-2 > dt {
  background: url(wyb-banner.png) 0 0 no-repeat;
  background-size: 100% 100%;
}
.topics-item-3 {
  width: 36%;
  margin-top: 2rem;
}
.topics-item-3 > dt {
  background: url(wyc-banner.png) 0 0 no-repeat;
  background-size: 100% 100%;
}
.topics-item-4 {
  width: 60%;
  margin-top: 2rem;
}
.topics-item-4 > dt {
  background: url(wyw-banner.png) 0 0 no-repeat;
  background-size: 100% 100%;
}
.pss_topics-item > dd {
  border: 1px solid #e5e5e5;
  border-top: 0;
  background-color: #fff;
  box-sizing: border-box;
  height: 284px;
  overflow: hidden;
}
.pss_topics-item > dd ul {
  width: 96%;
  margin: 0.5rem auto 1rem;
  max-height: 16rem;
  overflow-y: auto;
  padding-right: 1rem;
  box-sizing: border-box;
  padding: 0 1.5rem 0 0.5rem;
}
.pss_topics-item > dd ul::-webkit-scrollbar {
  width: 8px;
  background: #e4e7ed;
}

.pss_topics-item > dd ul::-webkit-scrollbar-thumb {
  background: #3867b7;
  border-radius: 10px;
}

.pss_topics-item > dd ul::-webkit-scrollbar-thumb:hover {
  background: #2261cb;
}
.pss_topics-item > dd ul li {
  height: 3.25rem;
  line-height: 3.25rem;
  font-size: 1.125rem;
}
.topics-item-btns {
  box-sizing: border-box;
  padding: 1em;
}
.topics-item-btns a {
  display: inline-block;
  line-height: 2rem;
  background-color: #f5f4f4;
  padding: 0 2em;
  margin: 0.5rem 0.25rem;
  font-size: 1.125rem;
}
.topics-subjects-change {
  margin-top: 1rem;
  position: relative;
}
.topics-subjects-change > span {
  border-radius: 10px;
  background-color: rgb(92, 156, 246);
  font-size: 22px;
  color: #fff;
  line-height: 2;
  display: block;
  margin: 0 auto;
  width: 146px;
  text-align: center;
}
.topics-subjects-change > span::after {
  content: '';
  border-top: 6px solid #eff;
  border-right: 6px solid transparent;
  border-left: 6px solid transparent;
  top: 19px;
  position: relative;
  left: 5px;
  cursor: default;
}
.topics-subjects-change > ul {
  margin: 0 auto;
  width: 146px;
  border: 1px solid #e8e8e8;
  background-color: #ffffff;
  box-shadow: 0px 5px 10px 0px rgba(0, 0, 0, 0.1);
  padding: 0 0 10px;
  position: absolute;
  z-index: 3;
  display: none;
  left: 7rem;
  left: calc(50% - 73px);
}
.topics-subjects-change > ul > li {
  height: 2.5rem;
  line-height: 2.5rem;
  text-align: center;
  overflow: hidden;
  font-size: 1rem;
  font-weight: normal;
}
.topics-subjects-change > ul > li.cur {
  background-color: #f0f0f0;
}
.topics-subjects-change > ul > li.cur a {
  color: #2072e4;
  font-weight: bold;
}
.pss_topics-item:nth-child(1) > dd ul::-webkit-scrollbar-thumb {
  background: #309ffe;
  border-radius: 10px;
}

.pss_topics-item:nth-child(1) > dd ul::-webkit-scrollbar-thumb:hover {
  background: #3cbef6;
}
.pss_topics-item:nth-child(2) > dd ul::-webkit-scrollbar-thumb {
  background: #fdd786;
  border-radius: 10px;
}

.pss_topics-item:nth-child(2) > dd ul::-webkit-scrollbar-thumb:hover {
  background: #febd68;
}
.pss_topics-item:nth-child(3) > dd ul::-webkit-scrollbar-thumb {
  background: #ffbaab;
  border-radius: 10px;
}

.pss_topics-item:nth-child(3) > dd ul::-webkit-scrollbar-thumb:hover {
  background: #fe98a9;
}
.pss_topics-item:nth-child(4) > dd ul::-webkit-scrollbar-thumb {
  background: #60c7fa;
  border-radius: 10px;
}

.pss_topics-item:nth-child(4) > dd ul::-webkit-scrollbar-thumb:hover {
  background: #00c2ec;
}
.banner-imgs-box {
  position: relative;
  /* height: 69.5%; */
}
.topic-banner-img {
  position: absolute;
  right: 10rem;
  bottom: -5rem;
  width: 260px;
}
.topic-banner-img img {
  width: 100%;
}