/* ================================
   导航栏下拉菜单样式 - 全新左右布局
   ================================ */

/* 下拉菜单容器 */
.k8-nav-dropdown {
  position: relative;
  display: inline-block;
}

/* 下拉触发器样式 */
.k8-nav-dropdown-trigger {
  cursor: pointer;
  user-select: none;
}

/* 导航链接箭头图标 */
.k8-nav-arrow {
  margin-left: 6px;
  font-size: 14px;
  transition: transform 0.2s ease, color 0.2s ease;
  transform-origin: center;
  display: inline-block;
}

/* 模糊玻璃遮罩层 - 只覆盖下拉面板下方 */
.k8-dropdown-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  pointer-events: none;
}

.k8-dropdown-backdrop.k8-backdrop-show {
  opacity: 1;
  visibility: visible;
}

/* 下拉面板基础样式 - 添加下边框阴影 */
.k8-dropdown-panel {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  width: 100vw;
  background: white;
  border-top: 1px solid var(--k8-border-light);
  z-index: 1001;
  display: block;
  margin-top: 0;

  /* 下边框阴影效果 - 完全只显示下边阴影 */
  box-shadow: 0 12px 24px -12px rgba(0, 0, 0, 0.1),
    0 6px 12px -6px rgba(0, 0, 0, 0.08);
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-bottom: 1px solid var(--k8-border-light);

  /* 设置展开动画属性 - 避免内容变形和白色闪现 */
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s;
  will-change: max-height, opacity;
}

/* 显示状态 */
.k8-dropdown-panel.k8-dropdown-show {
  display: block;
  max-height: 1000px;
  opacity: 1;
}

/* 下拉菜单容器 - 左右布局 */
.k8-dropdown-container {
  display: flex;
  min-height: 300px;
}

/* 左侧标签区域 */
.k8-dropdown-tabs {
  width: 320px;
  background: url('../images/side-bg.jpg') no-repeat center center;
  background-size: cover;
  border-right: 1px solid var(--k8-border-light);
  padding: 0;
  flex-shrink: 0;
  position: relative;
}

/* 标签区域标题 */
.k8-dropdown-tabs-title {
  padding: 20px 20px 16px 150px;
  font-size: 16px;
  font-weight: 600;
  color: var(--k8-dark);
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

/* 右侧内容区域 */
.k8-dropdown-content {
  flex: 1;
  display: flex;
  background: white;
  position: relative;
}

/* 动态内容区域 */
.k8-dropdown-main {
  flex: 1;
  padding: 32px;
  min-width: 0;
}

/* 固定介绍区域 */
.k8-dropdown-intro {
  width: 320px;
  padding: 32px;
  background: url('../images/img_tab_cloud.png') no-repeat center center;
  background-size: cover;
  border-left: 1px solid var(--k8-border-light);
  flex-shrink: 0;
}

/* 介绍内容 */
.k8-dropdown-intro-content {
  text-align: left;
}

.k8-dropdown-intro-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--k8-dark);
  margin-bottom: 12px;
  line-height: 1.3;
}

.k8-dropdown-intro-desc {
  font-size: 14px;
  color: var(--k8-text-muted);
  line-height: 1.5;
  margin-bottom: 24px;
}

.k8-dropdown-intro-actions {
  display: flex;
  justify-content: left;
}

.k8-dropdown-intro-btn {
  display: inline-block;
  padding: 8px 24px;
  background: var(--k8-gradient-primary);
  color: white;
  text-decoration: none;
  font-size: 14px;
}

.k8-dropdown-intro-btn:hover {
  background: var(--k8-primary-gradient);
}

/* 标签项样式 - 悬停显示内容 */
.k8-dropdown-tab {
  display: block;
  padding: 10px 20px;
  margin-left: 130px;
  cursor: pointer;
  transition: all 0.2s ease;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--k8-dark);
  text-decoration: none;
  position: relative;
  background: transparent;
}

.k8-dropdown-tab:hover {
  color: var(--k8-primary);
}

/* 激活状态样式 */
.k8-dropdown-tab.k8-dropdown-tab-active {
  color: var(--k8-primary);
}

.k8-dropdown-tab span {
  font-size: 14px;
  font-weight: 500;
  position: relative;
  display: inline-block;
}

/* 底部线条装饰 - 只应用到文字span上，排除badge */
.k8-dropdown-tab span:not(.k8-dropdown-badge)::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--k8-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
  will-change: transform;
}

.k8-dropdown-tab:hover span:not(.k8-dropdown-badge)::after,
.k8-dropdown-tab.k8-dropdown-tab-active span:not(.k8-dropdown-badge)::after {
  transform: scaleX(1);
}

/* HOT标签*/
.k8-dropdown-badge {
  background: rgba(255, 107, 107, 0.1);
  color: var(--k8-danger);
  font-size: 10px !important;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: 0;
  border: 1px solid rgba(255, 107, 107, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-left: 10px;
}

/* 内容面板 - 悬停显示 */
.k8-dropdown-content-pane {
  display: none;
}

/* 标签悬停时显示对应内容 - 由JavaScript完全控制 */
.k8-dropdown-content-pane.k8-dropdown-pane-show {
  display: block !important;
}

/* 默认状态显示第一个内容面板 - 由JavaScript控制 */
.k8-dropdown-content-pane.k8-dropdown-pane-default {
  display: block !important;
}

/* 搜索组件样式 - 统一与主导航搜索框风格 */
.k8-dropdown-search-form {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--k8-border-light);
  border-radius: 4px;
  padding: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  height: 40px;
  position: relative;
  margin-bottom: 16px;
}

.k8-dropdown-search-form:hover {
  border-color: var(--k8-border);
}

.k8-dropdown-search-input {
  flex: 1;
  border: none;
  outline: none;
  padding: 8px 12px;
  font-size: 14px;
  background: transparent;
  color: var(--k8-dark);
  height: 100%;
  box-shadow: none;
  margin: 0;
}

.k8-dropdown-search-input:focus {
  outline: none;
  border: none;
  box-shadow: none;
}

.k8-dropdown-search-input::placeholder {
  color: var(--k8-text-muted);
}

.k8-dropdown-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  outline: none;
  background: transparent;
  color: var(--k8-dark);
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: none;
  margin: 0;
  padding: 0;
}

.k8-dropdown-search-btn:focus {
  outline: none;
  border: none;
  box-shadow: none;
}

.k8-dropdown-search-btn:focus-visible {
  outline: 2px solid var(--k8-primary);
  outline-offset: 2px;
}

.k8-dropdown-search-btn:hover {
  color: var(--k8-primary);
}

.k8-dropdown-search-btn i {
  font-size: 14px;
}

/* 下拉菜单项目列表 */
.k8-dropdown-items {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  width: 100%;
}

/* 下拉菜单项目 */
.k8-dropdown-item {
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  position: relative;
  width: 320px;
  flex-shrink: 0;
}

.k8-dropdown-item:hover {
  background-color: rgba(27, 92, 230, 0.03);
  border-color: rgba(27, 92, 230, 0.1);
}

/* 项目标题 */
.k8-dropdown-item-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--k8-dark);
  line-height: 1.5;
  margin-bottom: 3px;
  transition: color 0.2s ease;
}

.k8-dropdown-item:hover .k8-dropdown-item-title {
  color: var(--k8-primary);
}

/* 项目描述 */
.k8-dropdown-item-desc {
  font-size: 12px;
  color: var(--k8-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}

/* 响应式设计 - 合并后的媒体查询 */

/* 4K分辨率及超大屏幕优化 (2560px+) */
@media (min-width: 2560px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 48px;
    margin-bottom: 20px;
  }

  .k8-dropdown-search-input {
    padding: 10px 16px;
    font-size: 16px;
  }

  .k8-dropdown-search-btn {
    width: 44px;
    height: 44px;
  }

  .k8-dropdown-search-btn i {
    font-size: 16px;
  }

  /* 其他组件样式 */
  .k8-dropdown-tabs {
    width: 480px;
  }

  .k8-dropdown-tab {
    margin-left: 200px;
    padding: 16px 28px;
  }

  .k8-dropdown-tab span {
    font-size: 16px;
  }

  .k8-dropdown-tabs-title {
    padding: 30px 28px 20px 228px;
    font-size: 18px;
  }

  .k8-dropdown-intro {
    width: 640px;
    padding: 52px;
  }

  .k8-dropdown-main {
    padding: 52px;
  }

  .k8-dropdown-intro-title {
    font-size: 22px;
    margin-bottom: 18px;
  }

  .k8-dropdown-intro-desc {
    font-size: 16px;
    margin-bottom: 32px;
    line-height: 1.7;
  }

  .k8-dropdown-intro-btn {
    padding: 14px 36px;
    font-size: 16px;
  }

  .k8-dropdown-items {
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 26px;
  }

  .k8-dropdown-panel.k8-dropdown-show {
    max-height: 1000px;
  }
}

/* 2K分辨率优化 (1920px - 2559px) */
@media (min-width: 1920px) and (max-width: 2559px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 44px;
    margin-bottom: 18px;
  }

  .k8-dropdown-search-input {
    padding: 9px 14px;
    font-size: 15px;
  }

  .k8-dropdown-search-btn {
    width: 40px;
    height: 40px;
  }

  .k8-dropdown-search-btn i {
    font-size: 15px;
  }

  /* 其他组件样式 */
  .k8-dropdown-tabs {
    width: 420px;
  }

  .k8-dropdown-tab {
    margin-left: 175px;
    padding: 14px 24px;
  }

  .k8-dropdown-tab span {
    font-size: 15px;
  }

  .k8-dropdown-tabs-title {
    padding: 26px 24px 18px 199px;
    font-size: 17px;
  }

  .k8-dropdown-intro {
    width: 520px;
    padding: 42px;
  }

  .k8-dropdown-main {
    padding: 42px;
  }

  .k8-dropdown-intro-title {
    font-size: 20px;
    margin-bottom: 16px;
  }

  .k8-dropdown-intro-desc {
    font-size: 15px;
    margin-bottom: 28px;
    line-height: 1.6;
  }

  .k8-dropdown-intro-btn {
    padding: 8px 24px;
    font-size: 15px;
  }

  .k8-dropdown-items {
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 22px;
  }

  .k8-dropdown-panel.k8-dropdown-show {
    max-height: 1000px;
  }
}

/* 1200px-1920px 断点优化 */
@media (min-width: 1200px) and (max-width: 1919px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 40px;
    margin-bottom: 16px;
  }

  .k8-dropdown-search-input {
    padding: 8px 12px;
    font-size: 14px;
  }

  .k8-dropdown-search-btn {
    width: 36px;
    height: 36px;
  }

  .k8-dropdown-search-btn i {
    font-size: 14px;
  }

  /* 其他组件样式 */
  .k8-dropdown-tabs {
    width: 360px;
  }

  .k8-dropdown-tab {
    margin-left: 150px;
  }

  .k8-dropdown-tabs-title {
    padding: 22px 20px 16px 170px;
    font-size: 16px;
  }

  .k8-dropdown-intro {
    width: 400px;
    padding: 36px;
  }

  .k8-dropdown-main {
    padding: 36px;
  }

  .k8-dropdown-items {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 18px;
  }
}

/* 1024px-1199px */
@media (min-width: 1024px) and (max-width: 1199px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 38px;
    margin-bottom: 15px;
  }

  .k8-dropdown-search-input {
    padding: 7px 11px;
    font-size: 13px;
  }

  .k8-dropdown-search-btn {
    width: 34px;
    height: 34px;
  }

  .k8-dropdown-search-btn i {
    font-size: 13px;
  }

  /* 其他组件样式 */
  .k8-dropdown-tabs {
    width: 280px;
  }

  .k8-dropdown-tab {
    margin-left: 115px;
  }

  .k8-dropdown-tabs-title {
    padding: 18px 20px 12px 135px;
    font-size: 15px;
  }

  .k8-dropdown-main {
    padding: 26px;
  }

  .k8-dropdown-intro {
    width: 320px;
    padding: 26px;
  }

  .k8-dropdown-items {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 14px;
  }
}

/* 768px-1023px */
@media (min-width: 768px) and (max-width: 1023px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 36px;
    margin-bottom: 14px;
  }

  .k8-dropdown-search-input {
    padding: 6px 10px;
    font-size: 12px;
  }

  .k8-dropdown-search-btn {
    width: 32px;
    height: 32px;
  }

  .k8-dropdown-search-btn i {
    font-size: 12px;
  }

  /* 其他组件样式 */
  .k8-dropdown-container {
    min-height: 250px;
  }

  .k8-dropdown-tabs {
    width: 240px;
  }

  .k8-dropdown-tab {
    margin-left: 100px;
    padding: 10px 16px;
  }

  .k8-dropdown-tab span {
    font-size: 13px;
  }

  .k8-dropdown-tabs-title {
    padding: 16px 16px 10px 116px;
    font-size: 14px;
  }

  .k8-dropdown-main {
    padding: 22px;
  }

  .k8-dropdown-intro {
    width: 280px;
    padding: 22px;
  }

  .k8-dropdown-items {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
  }
}

/* 576px-767px */
@media (min-width: 576px) and (max-width: 767px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 34px;
    margin-bottom: 13px;
  }

  .k8-dropdown-search-input {
    padding: 5px 9px;
    font-size: 11px;
  }

  .k8-dropdown-search-btn {
    width: 30px;
    height: 30px;
  }

  .k8-dropdown-search-btn i {
    font-size: 11px;
  }
}

/* 320px-575px */
@media (min-width: 320px) and (max-width: 575px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 32px;
    margin-bottom: 12px;
  }

  .k8-dropdown-search-input {
    padding: 4px 8px;
    font-size: 11px;
  }

  .k8-dropdown-search-btn {
    width: 28px;
    height: 28px;
  }

  .k8-dropdown-search-btn i {
    font-size: 10px;
  }
}

/* 超小屏幕 (max-width: 319px) */
@media (max-width: 319px) {

  /* 搜索组件样式 */
  .k8-dropdown-search-form {
    height: 30px;
    margin-bottom: 10px;
  }

  .k8-dropdown-search-input {
    padding: 4px 7px;
    font-size: 11px;
  }

  .k8-dropdown-search-btn {
    width: 26px;
    height: 26px;
  }

  .k8-dropdown-search-btn i {
    font-size: 10px;
  }
}

/* 900px 以下特殊处理 */
@media (max-width: 900px) {
  .k8-dropdown-intro {
    display: none;
  }

  .k8-dropdown-tabs {
    width: 200px;
  }

  .k8-dropdown-tab {
    margin-left: 80px;
  }

  .k8-dropdown-tabs-title {
    padding: 14px 16px 8px 96px;
    font-size: 13px;
  }

  .k8-dropdown-main {
    padding: 18px;
  }
}

/* 移动端隐藏下拉菜单 */
@media (max-width: 767px) {
  .k8-dropdown-panel {
    display: none !important;
  }

  .k8-nav-arrow {
    display: none;
  }
}

/* 鼠标悬停时的高亮效果 */
.k8-nav-dropdown:hover .k8-nav-link {
  color: var(--k8-primary);
}

.k8-nav-dropdown:hover .k8-nav-arrow {
  color: var(--k8-primary);
}

/* 下拉菜单打开时的导航链接状态 */
.k8-nav-dropdown.k8-dropdown-active .k8-nav-link {
  color: var(--k8-primary) !important;
}

/* 激活状态时箭头旋转 - 精确且优雅的解决方案 */
.k8-nav-dropdown.k8-dropdown-active .k8-nav-arrow {
  transform: rotate(180deg);
  color: var(--k8-primary);
}

/* 激活状态下的悬停 - 保持旋转状态 */
.k8-nav-dropdown.k8-dropdown-active:hover .k8-nav-arrow {
  transform: rotate(180deg);
  color: var(--k8-primary);
}