header {
  border-bottom: solid 1px #999;
  /* 调试后隐藏 */
}

/* 响应式导航菜单 */
@media (max-width: 767px) {
  .hidden-xs.hidden-sm {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .hidden-xs.hidden-sm {
    display: flex !important;
  }
}

/* nav */

.nav-logo img {
  height: 40px;
}

.nav a {
  position: relative;
  /* 关键：需要添加这行 */
}

.nav a:hover,
.nav a.active,
.nav-login a:hover {
  color: rgb(var(--blue-500));
}

.nav a:after {
  content: "";
  width: 0;
  height: 2px;
  background-color: rgb(var(--blue-500));
  position: absolute;
  left: 100%;
  bottom: -5px;
  /* 往下移动5px，可以根据需要调整 */
  transition: all 0.4s;
}

.nav a.active:after,
.nav a:hover:after {
  width: 100%;
  left: 0;
  transition-delay: 0.1s;
}

.nav ul {
  width: 100px;
  position: absolute;
  top: 20px;
  left: -10px;
  background-color: #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 10px 0;
  z-index: 1000;
  border-radius: 5px;
  display: none;
}
.nav>li:hover>ul,
.nav>li:hover>ul>li:hover {
  display: block;
}
.nav ul li {
  padding: 5px 10px;
  text-align: center;
  transition: background-color 0.3s ease;
}

.nav ul li:hover {
  background-color: rgb(var(--blue-100));
}

/* 添加这个来解决消失时在屏幕下面的问题 */
.nav a:not(:hover):not(.active):after {
  left: 100%;
}

/* 调整下拉菜单位置 */
.nav-login-list {
  position: relative;
  top: 75px;
  /* 从父元素底部开始 */
  left: -70px;
  /* 左对齐父元素 */
  z-index: 1000;
  /* 确保在其他元素之上 */
  display: none;
}

.nav-login-avatar {
  position: relative;
  display: inline-block;
}

.nav-login-avatar:hover~.nav-login-list,
.nav-login-list:hover {
  display: block;
}

/* banner */
.jquan-carousel {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 400px;
  background: rgb(var(--gray-100));
}

.jquan-carousel-wrapper {
  display: flex;
  transition: transform 0.5s ease-in-out;
  height: 100%;
}

.jquan-carousel-item {
  min-width: 100%;
  height: 100%;
  position: relative;
}

.jquan-carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.jquan-carousel-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: white;
  padding: 2rem 1rem 1rem;
}

.jquan-carousel-indicators {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 10;
}

.jquan-carousel-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.3s ease;
}

.jquan-carousel-indicator.active {
  background: white;
  width: 30px;
  border-radius: 5px;
}

.jquan-carousel-control {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  padding: 1rem;
  cursor: pointer;
  font-size: 1.2rem;
  transition: background 0.3s ease;
  z-index: 10;
}

.jquan-carousel-control:hover {
  background: rgba(0, 0, 0, 0.7);
}

.jquan-carousel-control.prev {
  left: 1rem;
  border-radius: 0 4px 4px 0;
}

.jquan-carousel-control.next {
  right: 1rem;
  border-radius: 4px 0 0 4px;
}

/* 不同尺寸的轮播 */
.jquan-carousel-sm {
  height: 300px;
}

.jquan-carousel-lg {
  height: 500px;
}

.jquan-carousel-full {
  height: 100vh;
}

/* 自动播放时的暂停按钮 */
.jquan-carousel-play-pause {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 4px;
  z-index: 10;
  transition: background 0.3s ease;
}

.jquan-carousel-play-pause:hover {
  background: rgba(0, 0, 0, 0.7);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .jquan-carousel {
    height: 250px;
  }

  .jquan-carousel-sm {
    height: 200px;
  }

  .jquan-carousel-lg {
    height: 350px;
  }

  .jquan-carousel-control {
    padding: 0.5rem;
    font-size: 1rem;
  }

  .jquan-carousel-caption {
    padding: 1rem 0.5rem 0.5rem;
  }
}

/* 选项卡组件专用样式 */
.jquan-course-tabs {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  overflow: hidden;
}

/* 课程类型标签按钮 */
.jquan-tab-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1.5rem;
  background: rgb(var(--gray-50));
  border-bottom: 1px solid rgb(var(--gray-200));
}

.jquan-tab-button {
  padding: 0.75rem 1.5rem;
  border: 2px solid transparent;
  border-radius: 25px;
  background: white;
  color: rgb(var(--gray-600));
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.jquan-tab-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg,
      transparent,
      rgba(255, 255, 255, 0.6),
      transparent);
  transition: left 0.5s;
}

.jquan-tab-button:hover::before {
  left: 100%;
}

.jquan-tab-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.jquan-tab-button.active {
  background: rgb(var(--blue-500));
  color: white;
  border-color: rgb(var(--blue-500));
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.jquan-tab-button.programming.active {
  background: rgb(var(--indigo-500));
  border-color: rgb(var(--indigo-500));
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.jquan-tab-button.design.active {
  background: rgb(var(--purple-500));
  border-color: rgb(var(--purple-500));
  box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
}

.jquan-tab-button.business.active {
  background: rgb(var(--green-500));
  border-color: rgb(var(--green-500));
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
}

.jquan-tab-button.language.active {
  background: rgb(var(--orange-500));
  border-color: rgb(var(--orange-500));
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

/* 选项卡内容显示/隐藏 */
.jquan-course-grid {
  display: none;
}

.jquan-course-grid.active {
  display: grid;
}

/* 课程卡片容器 */
.jquan-course-content {
  padding: 2rem;
  min-height: 600px;
}

.jquan-course-grid {
  display: none;
  /* 默认隐藏 */
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.jquan-course-grid.active {
  display: grid;
  /* 激活时显示 */
}

/* 课程卡片 */
.jquan-course-card {
  background: white;
  border: 1px solid rgb(var(--gray-200));
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
}

.jquan-course-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg,
      rgb(var(--blue-400)),
      rgb(var(--blue-600)));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.jquan-course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.jquan-course-card:hover::before {
  transform: scaleX(1);
}

.jquan-course-card.programming::before {
  background: linear-gradient(90deg,
      rgb(var(--indigo-400)),
      rgb(var(--indigo-600)));
}

.jquan-course-card.design::before {
  background: linear-gradient(90deg,
      rgb(var(--purple-400)),
      rgb(var(--purple-600)));
}

.jquan-course-card.business::before {
  background: linear-gradient(90deg,
      rgb(var(--green-400)),
      rgb(var(--green-600)));
}

.jquan-course-card.language::before {
  background: linear-gradient(90deg,
      rgb(var(--orange-400)),
      rgb(var(--orange-600)));
}

.jquan-course-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: rgb(var(--gray-100));
}

.jquan-course-info {
  padding: 1.5rem;
}

.jquan-course-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: rgb(var(--gray-800));
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.jquan-course-description {
  color: rgb(var(--gray-600));
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.jquan-course-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid rgb(var(--gray-200));
}

.jquan-course-instructor {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.jquan-instructor-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgb(var(--gray-300));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: rgb(var(--gray-600));
}

.jquan-instructor-name {
  font-size: 0.875rem;
  color: rgb(var(--gray-700));
  font-weight: 500;
}

.jquan-course-stats {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.jquan-course-stat {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: rgb(var(--gray-500));
}

/* 课程目录弹窗 */
.jquan-course-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.jquan-course-modal.active {
  opacity: 1;
  visibility: visible;
}

.jquan-modal-content {
  background: white;
  border-radius: 16px;
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.8);
  transition: transform 0.3s ease;
}

.jquan-course-modal.active .jquan-modal-content {
  transform: scale(1);
}

.jquan-modal-header {
  position: relative;
  height: 250px;
  background: linear-gradient(135deg,
      rgb(var(--blue-500)),
      rgb(var(--blue-700)));
  display: flex;
  align-items: end;
  padding: 2rem;
  color: white;
}

.jquan-modal-header.programming {
  background: linear-gradient(135deg,
      rgb(var(--indigo-500)),
      rgb(var(--indigo-700)));
}

.jquan-modal-header.design {
  background: linear-gradient(135deg,
      rgb(var(--purple-500)),
      rgb(var(--purple-700)));
}

.jquan-modal-header.business {
  background: linear-gradient(135deg,
      rgb(var(--green-500)),
      rgb(var(--green-700)));
}

.jquan-modal-header.language {
  background: linear-gradient(135deg,
      rgb(var(--orange-500)),
      rgb(var(--orange-700)));
}

.jquan-modal-course-info {
  position: relative;
  z-index: 2;
}

.jquan-modal-course-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.jquan-modal-course-instructor {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  opacity: 0.9;
}

.jquan-modal-instructor-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.jquan-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  color: white;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.jquan-modal-close:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: rotate(90deg);
}

.jquan-modal-body {
  padding: 2rem;
  max-height: calc(90vh - 250px);
  overflow-y: auto;
}

/* 课程目录章节 */
.jquan-course-chapters {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.jquan-chapter-item {
  border: 1px solid rgb(var(--gray-200));
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.jquan-chapter-item:hover {
  border-color: rgb(var(--blue-300));
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.jquan-chapter-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: rgb(var(--gray-50));
  cursor: pointer;
  user-select: none;
}

.jquan-chapter-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  color: rgb(var(--gray-800));
}

.jquan-chapter-toggle {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
  color: rgb(var(--gray-500));
}

.jquan-chapter-item.expanded .jquan-chapter-toggle {
  transform: rotate(180deg);
}

.jquan-lessons {
  display: none;
  border-top: 1px solid rgb(var(--gray-200));
}

.jquan-chapter-item.expanded .jquan-lessons {
  display: block;
}

.jquan-lesson-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem 0.75rem 3rem;
  border-bottom: 1px solid rgb(var(--gray-100));
  transition: all 0.3s ease;
  cursor: pointer;
}

.jquan-lesson-item:last-child {
  border-bottom: none;
}

.jquan-lesson-item:hover {
  background: rgb(var(--blue-50));
}

.jquan-lesson-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}

.jquan-lesson-icon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: white;
}

.jquan-lesson-icon.video {
  background: rgb(var(--red-500));
}

.jquan-lesson-icon.quiz {
  background: rgb(var(--amber-500));
}

.jquan-lesson-icon.assignment {
  background: rgb(var(--green-500));
}

.jquan-lesson-icon.download {
  background: rgb(var(--blue-500));
}

.jquan-lesson-title {
  font-size: 0.875rem;
  color: rgb(var(--gray-700));
}

.jquan-lesson-duration {
  font-size: 0.75rem;
  color: rgb(var(--gray-500));
}

/* 加载和空状态 */
.jquan-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  color: rgb(var(--gray-500));
}

.jquan-loading-icon {
  width: 48px;
  height: 48px;
  border: 3px solid rgb(var(--gray-200));
  border-top: 3px solid rgb(var(--blue-500));
  border-radius: 50%;
  animation: jquan-spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes jquan-spin {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

.jquan-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  color: rgb(var(--gray-500));
  text-align: center;
}

.jquan-empty-icon {
  width: 64px;
  height: 64px;
  background: rgb(var(--gray-200));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .jquan-tab-buttons {
    padding: 1rem;
    gap: 0.25rem;
  }

  .jquan-tab-button {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
  }

  .jquan-course-content {
    padding: 1rem;
  }

  .jquan-course-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .jquan-modal-content {
    width: 95%;
    margin: 1rem;
  }

  .jquan-modal-header {
    height: 200px;
    padding: 1.5rem;
  }

  .jquan-modal-course-title {
    font-size: 1.5rem;
  }

  .jquan-modal-body {
    padding: 1.5rem;
  }

  .jquan-lesson-item {
    padding: 0.5rem 1rem 0.5rem 2rem;
  }
}

@media (max-width: 480px) {
  .jquan-tab-button {
    flex: 1;
    text-align: center;
    font-size: 0.75rem;
    padding: 0.5rem;
  }
}

/* 登录页 */
.jquan-logon-logo {
  position: relative;
  overflow: hidden;
}

.jquan-logon-logo svg {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

.jquan-text--line {
  font-size: 300px;
  font-family: Arial, sans-serif;
  font-weight: bold;
}

.jquan-text--line2 {
  font-size: 300px;
  font-family: Arial, sans-serif;
  font-weight: bold;
}

.jquan-text-copy {
  fill: none;
  stroke: white;
  stroke-dasharray: 7% 28%;
  stroke-width: 4px;
  -webkit-animation: stroke-offset 5s infinite linear;
  animation: stroke-offset 5s infinite linear;
}

.jquan-text-copy:nth-child(1) {
  stroke: #360745;
  stroke-dashoffset: 7%;
}

.jquan-text-copy:nth-child(2) {
  stroke: #D61C59;
  stroke-dashoffset: 14%;
}

.jquan-text-copy:nth-child(3) {
  stroke: #E7D84B;
  stroke-dashoffset: 21%;
}

.jquan-text-copy:nth-child(4) {
  stroke: #EFEAC5;
  stroke-dashoffset: 28%;
}

.jquan-text-copy:nth-child(5) {
  stroke: #1B8798;
  stroke-dashoffset: 35%;
}

@-webkit-keyframes stroke-offset {
  50% {
    stroke-dashoffset: 35%;
    stroke-dasharray: 0 87.5%;
  }
}

@keyframes stroke-offset {
  50% {
    stroke-dashoffset: 35%;
    stroke-dasharray: 0 87.5%;
  }
}

/* video */

.mt-84 {
  margin-top: 84px;
}

.section-title {
  position: relative;
  margin-bottom: 1rem;
  font-size: 1.25rem;
  font-weight: 600
}

.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: rgb(var(--blue-500));
  margin-top: .3rem;
  border-radius: 2px
}

/* 播放器占位符 */
.video-player-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: 12px;
  overflow: hidden;
  background: #000
}

.video-player-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  -webkit-transition: .3s;
  transition: .3s
}

.video-player-wrapper .play-mask {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, .5);
  display: flex;
  align-items: center;
  justify-content: center
}

.play-btn {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .15);
  color: #fff;
  font-size: 30px;
  line-height: 64px;
  text-align: center;
  cursor: pointer
}

/* tab-bar */
.tab-bar {
  display: flex;
  border-bottom: 1px solid rgb(var(--gray-200));
  margin-bottom: 1rem
}

.tab-bar span {
  cursor: pointer;
  padding: .75rem 1rem;
  position: relative;
  font-weight: 500
}

.tab-bar span.active {
  color: rgb(var(--blue-500))
}

.tab-bar span.active:after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgb(var(--blue-500))
}

/* chapter-list */
.chapter {
  border: 1px solid rgb(var(--gray-200));
  border-radius: 8px;
  margin-bottom: .75rem
}

.chapter-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1rem;
  background: rgb(var(--gray-50));
  cursor: pointer
}

.chapter-body {
  display: none
}

.chapter.open .chapter-body {
  display: block
}

.lesson-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem 1rem .5rem 3rem;
  border-bottom: 1px solid rgb(var(--gray-100))
}

.lesson-item:last-child {
  border: none
}

.lesson-item:hover {
  background: rgb(var(--blue-50));
  cursor: pointer
}

.lesson-title {
  font-size: .875rem;
  color: rgb(var(--gray-700))
}

.lesson-duration {
  font-size: .75rem;
  color: rgb(var(--gray-500))
}

/* swiper-row（横向滚动） */
.swiper-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: .5rem
}

.card-mini {
  flex: 0 0 220px;
  border: 1px solid rgb(var(--gray-200));
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer
}

.card-mini img {
  width: 100%;
  height: 120px;
  object-fit: cover
}

.card-mini .info {
  padding: .75rem
}

.card-mini .title {
  font-size: .875rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: .25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden
}