body {  
  font-family: Arial, sans-serif;  
}  
  .floor-title{
    font-size: 40px;
    font-family: PingFang SC;
    font-weight: 600;
    color: #fff;
    text-align: center;
  }
.floor-box {  
  width: 100%;  
  display: flex;  
  flex-direction: column;  
  align-items: center;  
  height: 788px;
    background-image: url(../images/202405/jsudo-bg90mgie002eg.png);
    position: relative;
    background-repeat: no-repeat;
    background-size: cover;
}  
  .floor-subtitle{
    width: 969px;
    margin: 20px auto 0;
    font-size: 18px;
    font-family: PingFang SC;
    font-weight: 400;
    color: #fff;
    opacity: .6;
  }
.floor-content {  
  display: flex;  
  justify-content: space-between;  
}  
  .floor-content{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    display: flex;
  }
.floor-directory {  
  width: 200px;
  height: 540px;
  background: rgba(23, 24, 27, 0.5);
  box-shadow: 0 12px 48px 0 rgb(0 113 239 / 10%);
  backdrop-filter: blur(14px);
  padding: 56px 0 0;
  cursor: pointer;
}  
  
.floor-panels {  
  height: 540px;
  width: 730px;
  background: rgba(23, 24, 27, 0.4);
  backdrop-filter: blur(14px);
  padding: 56px 40px 0;
}  
  
.panel {  
  display: none;  
}  
  
.panel:first-child {  
  display: block; /* 默认显示第一个面板 */  
}  
  
.directory-item {  
  border-radius: 0px 4px 4px 0px;
  width: 180px;
  height: 56px;
  line-height: 56px;
  text-align: left;
  padding-left: 25px;
  font-size: 16px;
  font-family: PingFang SC;
  font-weight: 400;
  color: #fff;
  margin-bottom: 16px;
}  
  
/* 可选：高亮悬停的目录项 */  
.directory-item:hover {  
  background-color: #136ad5;  
}
.directory-item::after {
    content: "";
    display: block;
    width: 3px;
    height: 0;
    background: #2bce7c;
    position: absolute;
    left: 0;
    top: 50%;
    -o-transition: 0.5s;
    -moz-transition: 0.5s;
    transition: 0.5s;
    /* -webkit-transition: 0.5s; */
}
.text-white {
  color: #fff;
}
.f-s-24 {
  font-size: 24px;
}
.article_content {
  height: 540px;
  width: 730px;
  background: rgba(23, 24, 27, 0.4);
  backdrop-filter: blur(14px);
  padding: 56px 40px 0;
}
.btn{
  margin-left: 24px;
  line-height: 50px;
  height: 52px;
  font-size: 20px;
  padding: 0 36px;
  min-width: 168px;
  border-radius: 26px;
  background-color: transparent;
    border-color: #3370ff;
    color: #3370ff;
    text-align: center;
    border: 1px solid transparent;
    transition: all .3s ease;
    z-index: auto;
    /* border: 1px solid rgba(255, 255, 255, 0.6);*/
  }
.proview-btn{
   height: 52px; 
    font-size: 20px; 
    padding: 0 36px; 
   min-width: 168px; 
    border-radius: 26px;
    background-color: #3370ff;
    color: #fff;
    text-align: center;
    margin: 0;
    vertical-align: middle;
    border: 1px solid rgba(255, 255, 255, 0);

}
#article_desc {
  opacity: 0.8;
}
.fun_border_bottom {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.flex-justify-between {
  justify-content: space-between;
}

.m-l-15 {
  margin-left: 15px;
}
.m-t-50 {
  margin-top: 50px;
}
.flex {
  display: flex;
}
.fun_border_bottom {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.flex-justify-between {
  justify-content: space-between;
}
.p-b-56 {
  padding-bottom: 56px;
}
.m-t-44 {
  margin-top: 44px;
}
.align-center {
  align-items: center;
}
.flex-column {
  flex-direction: column;
}
.flex-justify-center {
  justify-content: center;
}
.h-30 {
  height: 30px;
}
.w-30 {
  width: 30px;
}

img, button, input, textarea {
  border: none;
  outline: none;
  resize: none;
}
.text-white {
  color: #fff;
}
.f-s-12 {
  font-size: 12px;
}
.p-t-8 {
  padding-top: 8px;
}

/* 选中状态的样式 */  
.directory-item.selected {  
  background-color: #136ad5;   
}  
  
/* 移除悬停时默认的背景色变化（如果你之前添加了的话） */  
.directory-item:hover {  
  /* background-color: #ddd; 这行可以移除，因为我们用JavaScript管理背景色 */  
}
/* ... 其他样式 ... */