#r1 {
  min-height: 1000px;
}
.question-title {
  display: flex;
  justify-content: center;
  margin: 130px 0 50px;
  padding: 100px 10px 0;
  font-weight: bold;
  color: #d70917;
  > * {
    font-size: 44px !important;
  }
}
@media screen and (max-width: 768px) {
  .question-title {
    margin: 0 0 25px;
  }
  .question-title * {
    font-size: 17px !important;
  }
}

.question {
  padding: 0 5%;
  width: 100%;
}
@media screen and (max-width: 768px) {
  .question {
    padding: 0 3%;
  }
}

.tabs-container {
  border-bottom: 1px solid #e1e4e8;
  width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

.tabs-container::-webkit-scrollbar {
  display: none;
}

.tabs {
  list-style: none;
  margin: 0;
  display: inline-flex;
  min-width: 100%;
  gap: 8px;
  padding: 0;
}

.tab {
  padding: 8px 0px;
  cursor: pointer;
  font-weight: 600;
  color: #555;
  font-size: 15px;
  border-bottom: 3px solid transparent;
  transition: all 0.3s ease;
  margin-right: 20px;
  white-space: nowrap;
  user-select: none;
}
@media screen and (max-width: 768px) {
  .tab {
    font-size: 14px;
    padding: 5px 0;
    margin-right: 12px;
  }
}

.tab:hover {
  color: #d70917;
}

.tab.active {
  color: #d70917;
  border-bottom: 3px solid #d70917;
}
@media screen and (max-width: 768px) {
  .tab.active {
    border-bottom: 2px solid #d70917;
  }
}

.content-container {
  padding: 25px;
}
@media screen and (max-width: 768px) {
  .content-container {
    padding: 10px;
  }
}

.content-section {
  display: none;
}

.content-section.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.markdown-content {
  line-height: 1.8;
}

.markdown-content p,
.markdown-content span {
  font-size: 16px;
  margin-bottom: 16px;
}
@media screen and (max-width: 768px) {
  .markdown-content p,
  .markdown-content span {
    font-size: 12px;
  }
}

.markdown-content code {
  background-color: #f6f8fa;
  border-radius: 4px;
  padding: 2px 6px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
}

.markdown-content pre {
  background-color: #f6f8fa;
  border-radius: 6px;
  padding: 16px;
  overflow: auto;
  margin: 20px 0;
}

.markdown-content pre code {
  background: none;
  padding: 0;
}

.markdown-content blockquote {
  border-left: 4px solid #dfe2e5;
  color: #6a737d;
  margin: 20px 0;
  padding-left: 16px;
}

.markdown-content ul,
.markdown-content ol {
  margin: 16px 0;
  padding-left: 30px;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
}

.markdown-content th,
.markdown-content td {
  border: 1px solid #dfe2e5;
  padding: 12px;
  text-align: left;
}

.markdown-content th {
  background-color: #f6f8fa;
  font-weight: 600;
}

.markdown-content tr:nth-child(even) {
  background-color: #f9f9f9;
}

.manual {
  padding: 15px 25px;
  border: 0;
  border-radius: 30px;
  background: #e5e5e5;
  color: #555;
  margin-right: 20px;
  font-size: 16px;
  font-weight: 700;
}

@media screen and (max-width: 768px) {
  .manual {
    font-size: 14px;
    padding: 13px 20px;
  }

  #preview {
    padding: 12px 20px;
  }
}

.manual:hover {
  background-color: #d70917;
  color: #fff;
  cursor: pointer;
}

.manual i {
  font-size: 12px !important;
  margin-right: 7px;
}

.manual .preview {
  font-size: 16px !important;
}

.video {
  padding: 20px 35px;
  border-radius: 30px;
  background: #e5e5e5;
  color: #555;
}

@media screen and (max-width: 768px) {
  .video {
    font-size: 14px;
    padding: 14px 18px;
  }
}

.video:hover {
  background-color: #d70917;
  color: #fff;
  cursor: pointer;
}

.video i {
  font-size: 14px !important;
  margin-right: 10px;
}
@media screen and (max-width: 768px) {
  .video i {
    margin-right: 8px;
  }
}

.video-wh {
  width: 373px !important;
  height: 665px !important;
}

@media screen and (max-width: 768px) {
  .video-wh {
    width: 300px !important;
    height: 535px !important;
    max-height: 143vw !important;
  }
}

@media screen and (max-width: 768px) {
  .video .play {
    font-size: 14px !important;
  }
}

.video-bg {
  width: auto !important;
  margin-top: 2em;
}

.close {
  cursor: pointer !important;
}

.question-list {
  font-weight: bold;
  margin-bottom: 8px;
  line-height: 1.15;
}

.question-list em {
  color: #d70917;
}

.question-list .list-header {
  display: flex;
  justify-content: space-between;
  margin: 25px 0 5px;
  padding-bottom: 10px;
}

@media screen and (max-width: 768px) {
  .question-list .list-header {
    margin: 15px 0 0;
    padding-bottom: 0;
  }
}

.question-list .list-header:hover {
  cursor: pointer;
  color: #d70917;
}

.question-list .list-header > * {
  align-self: flex-start;
}

.question-list .list-header .circle {
  font-weight: normal;
  margin-right: 10px;
  font-size: 20px;
}

@media screen and (max-width: 768px) {
  .question-list .list-header .circle {
    margin-right: 3px;
    font-size: 14px;
  }
}

.question-list .list-header .title {
  font-size: 20px;
}

@media screen and (max-width: 768px) {
  .question-list .list-header .title {
    font-size: 14px;
  }
}

.question-list .list-header .arrow {
  transition: all 0.3s ease-in-out;
  height: auto;
}

.question-list .list-header .arrow > .iconfont {
  font-size: 20px;
}

@media screen and (max-width: 768px) {
  .question-list .list-header .arrow > .iconfont {
    font-size: 14px;
  }
}

.question-list.active .list-header .arrow {
  transform: rotate(90deg);
}

.question-list .list-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: 0.3s;
  margin-left: 10px;
  overflow: hidden;
}

.question-list .list-content > div {
  min-height: 0;
}

.question-list.active .list-content {
  grid-template-rows: 1fr;
}

@media screen and (max-width: 768px) {
  .question-list .video-mt {
    margin-top: 15px;
  }
}