.s-container {
  max-width: 1920px;
  margin: auto;
}
/* 头部 */
.s-header {
  min-width: 1440px;
  height: 84px;
  padding-left: 80px;
  padding-right: 250px;
  color: #fff;
  background-color: var(--primary);
}
.s-header a:hover {
  color: rgba(255, 255, 255, 0.8);
}
.s-back i {
  font-size: 22px;
}
.s-title {
  font-size: 20px;
  font-weight: 500;
  margin-left: 50px;
}
.s-avatar {
  overflow: hidden;
  border-radius: 50%;
  width: 42px;
  height: 42px;
}
.s-name {
  font-size: 16px;
  margin-right: 24px;
}
.s-dot {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 1.5em;
  aspect-ratio: 1/1;
  padding: 2px;
  font-size: 10px;
  color: var(--primary);
  border-radius: 50%;
  background-color: #fff;
}

/* 内容 */
.s-main {
  background: rgba(247, 249, 252, 0.75);
}
.s-nav {
  min-width: 1440px;
  height: 67px;
}
.s-tabs, .s-course {
  height: 100%;
}
.s-tab {
  padding: 0 30px;
  margin-left: 30px;
}
.s-link {
  position: relative;
  height: 100%;
  font-size: 16px;
}
.s-link i {
  font-size: 20px;
  margin-right: 6px;
}
.s-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary);
}
.s-course {
  padding-top: 12px;
}
.s-link2 {
  font-size: 16px;
  margin: 0 50px;
  height: 100%;
}

/* 视频学习/电子讲义/同步练习/题目解析 */
.s-bd {
  padding: 0 20px;
}
.s-inner {
  min-width: 1440px;
  padding: 32px;
}
.s-video-box {
  height: 770px;
}

.s-pract {
  padding: 70px 50px;
}
.s-pract-h5 {
  min-height: 50px;
  font-size: 18px;
  font-weight: 500;
}
.s-pract .layui-input-block {
  margin-left: 0;
  margin-bottom: 15px;
}
.layui-form-radio {
  font-size: 16px;
  color: #949494;
}
.s-explain {
  padding: 48px 70px 70px;
}
.s-p-video {
  width: 600px;
  height: 360px;
}
.s-p-answer {
  padding-left: 45px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.answer-p {
  line-height: 2;
  color: #525252;
}
.s-p-imgs {
  margin-top: 46px;
  min-height: #ebebeb;
}
/* 课程信息 课程评价 */
.s-v-info {
  padding: 20px 0;
  border-bottom: 1px solid #e3e3e3;
}
.s-v-h5 {
  font-size: 22px;
  font-weight: 500;
  color: #000;
}
.s-v-p {
  width: 1100px;
  font-size: 17px;
  color: #808080;
}
.s-v-tool {
  margin: auto;
  font-size: 16px;
  color: #545454;
}
.s-v-tool i {
  font-size: 24px;
  color: #4d4d4d;
}
.com-form {
  padding: 45px 0 30px;
  border-bottom: 1px solid #e3e3e3;
}
.s-avatar {
  width: 51px;
  height: 51px;
  border-radius: 50%;
  overflow: hidden;
  margin-right: 14px;
}

.com-form .layui-textarea {
  padding: 16px 20px;
  font-size: 16px;
  min-height: 155px;
  background-color: rgba(204, 204, 204, 0.1);
  border: 1px solid rgba(201, 201, 201, 1);
}
.com-form .layui-input-block {
  margin-left: 0;
}
.com-form .layui-textarea::placeholder {
  font-size: 15px;
  color: #808080;
}
.com-form-btn {
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 65px;
  height: 30px;
  line-height: 30px;
  background-color: rgba(0, 133, 208, 0.42);
  color: #fff;
}
.s-textarea::placeholder {
  font-size: 15px;
  color: #808080;
}
.com-item {
  padding: 25px 0 40px;
  border-bottom: 1px solid #e3e3e3;
}
.com-nomore {
  margin-top: 50px;
  text-align: center;
  color: #949494;
}

/* 右侧 */
.s-aside {
  width: 336px;
}
.s-aside-t {
  padding: 32px 36px 32px 30px;
  background: rgba(204, 204, 204, 0.19);
}
.s-chapt {
  padding: 0 14px;
  height: 50px;
  line-height: 50px;
  font-size: 17px;
  background-color: rgba(0, 133, 208, 0.1);
}
.chapt-list {
  margin-top: 24px;
  transition: all 0.4s;
}
.chapt-item {
  margin-bottom: 16px;
}
.chapt-item-l {
  font-size: 15px;
  color: #808080;
  padding-right: 6px;
}
.chapt-item .com-tag {
  padding: 0;
}

.chapt-textarea {
  margin: 13px auto 19px;
}
.chapt-btn {
  width: 100%;
  background-color: var(--primary);
}
/* 课程推荐 */
.s-aside-b {
  margin-top: 20px;
  padding: 20px;
}
.re-h5 {
  margin-left: 8px;
}
.re-item {
  margin-left: 19px;
  margin-right: 20px;
}