* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 常见问题容器 */
.help-container {
  display: flex;
  margin: 0 auto;
  padding-top: 80px;
  padding-bottom: 130px;
}

@media (min-width: 768px) {
  .help-container{
    width: 750px;
  }
}

@media (min-width: 992px) {
  .help-container{
    width: 970px;
  }
}

@media (min-width: 1200px) {
  .help-container{
    width: 1170px;
  }
}

/* 左侧内容区域 */
.help-content {
  width: 75%;
  padding-left:15px;
  padding-right:15px;
}


.help-main-title {
  font-size: 24px;
  font-weight: 500;
  color: #333;
  margin-bottom: 43px;
  margin-top: 60px;
  line-height: 33px;
  position: relative;
}

.help-main-title:before {
  content: " ";
  width: 48px;
  height: 3px;
  position: absolute;
  background: #357AD5;
  top: 43px;
  left: 0;
}

.help-section:first-child .help-main-title {
  margin-top: 0;
}

.help-subsection {
  margin-bottom: 20px;
}

.help-subsection:last-child {
  margin-bottom: 0;
}

.help-sub-title {
  font-size: 18px;
  font-weight: 500;
  color: #333;
  margin-bottom: 10px;
  line-height: 25px;
}

.help-text {
  font-size: 14px;
  color: #555;
  line-height: 24px;
  margin-bottom: 10px;
}

.help-text:last-child {
  margin-bottom: 0;
}

.help-text a {
  color: #357AD5;
  text-decoration: none;
}
/* 右侧导航栏 */
.help-sidebar {
  width: 25%;
  flex-shrink: 0;
  position: sticky;
  top: 100px;
  align-self: flex-start;
}

.help-nav {
  position: relative;
  margin-top: 26px;
  margin-left: 80px;
}

.help-nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  padding-left:40px;
}

.help-nav-item {
  display: block;
  color: #555555;
  text-decoration: none;
  font-size: 16px;
  line-height: 1.5;
  position: relative;
  border-left: 2px solid #E5E5E5;
  padding:15px 30px;
}

.help-nav-item:after {
    content: " ";
    background-color:#E5E5E5;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    position: absolute;
    color: #E5E5E5;
    left: -4px;
    top: 22px;
}

.help-nav-list li:first-child:before {
    content: "○";
    position: absolute;
    left: 33px;
    top: -14px;
    color: #E5E5E5;
}

.help-nav-list .active:after {
    width: 10px;
    height: 6px;
    left: -6px;
    border-radius: 0;
    background-color: #357AD5;
}

.help-nav-item:hover {
  text-decoration: underline;
}



/* 响应式设计 */
@media (max-width: 992px) {
  .help-container{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .help-content{
    width: 100%;
  }
  .help-sidebar{
    width: 100%;
  }
}

@media only screen and (max-width: 468px){
  .help-container{
    padding-bottom:60px;
  }
  .help-sidebar{
    display: none;
  }
}