/* Help Center Detail Page */
.help-center-detail-page {
  min-height: 100vh;
}

/* Hero Section - 复用 help-center 的样式 */
.help-center-hero-section {
  position: relative;
  padding: var(--spacing-3xl) 0;
  background-image: url('../images/help-center/nav-bg.png');
  background-repeat: no-repeat;
  background-position: center;
  background-size: 100% 100%;
  min-height: 400px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.help-center-hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.help-center-hero-title {
  font-size: 48px;
  font-weight: var(--font-weight-bold);
  color: #333333;
  margin-bottom: var(--spacing-2xl);
  line-height: 1.2;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
}

.help-center-hero-subtitle {
  font-size: 20px;
  color: #2B63F8;
  line-height: 1.6;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  font-weight: 400;
}

/* Help Detail Section */
.help-detail-section {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-bg);
}

.help-detail-layout {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 0;
  max-width: var(--container-max-width);
  margin: 0 auto;
  position: relative;
}

.help-detail-layout::before {
  content: '';
  position: absolute;
  left: 350px;
  top: 0;
  bottom: 0;
  width: 1px;
  background-color: #e0e0e0;
  z-index: 1;
}

/* Left Sidebar */
.help-sidebar {
  background-color: #ffffff;
  padding: var(--spacing-lg);
  height: fit-content;
  position: sticky;
  top: var(--spacing-xl);
}

.help-sidebar-category {
  margin-bottom: var(--spacing-md);
  position: relative;
}

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

.help-sidebar-category.active::after {
  content: '';
  position: absolute;
  left: calc(var(--spacing-md) + 12px);
  top: 54px;
  width: 2px;
  background-color: #EBEFF8;
  z-index: 0;
  height: 85%;
}

.help-sidebar-category.active:last-child::after {
  display: none;
}

.help-sidebar-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  cursor: pointer;
  border-radius: 8px;
  transition: background-color var(--transition-base);
}


.help-sidebar-icon {
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.help-sidebar-title {
  flex: 1;
  font-size: 20px;
  font-weight: var(--font-weight-semibold);
  color: #333333;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
}

.help-sidebar-arrow {
  width: 16px;
  height: 16px;
  object-fit: contain;
  flex-shrink: 0;
  transition: transform var(--transition-base);
}

.help-sidebar-category.active .help-sidebar-arrow {
  transform: rotate(180deg);
}

.help-sidebar-list {
  list-style: none;
  padding: 0;
  margin: var(--spacing-sm) 0 0 0;
  padding-left: 40px;
  display: none;
}

.help-sidebar-category.active .help-sidebar-list {
  display: block;
}

.help-sidebar-item {
  margin-bottom: var(--spacing-xs);
}

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

.help-sidebar-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 16px;
  color: #666666;
  text-decoration: none;
  border-radius: 6px;
  transition: all var(--transition-base);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  line-height: 1.5;
}

.help-sidebar-link:hover {
  background-color: #F5FBFF;
  color: #2B63F8;
}

.help-sidebar-item.active .help-sidebar-link {
  background-color: #F5FBFF;
  color: #2B63F8;
  font-weight: var(--font-weight-semibold);
}

/* Right Content Area */
.help-content {
  background-color: #ffffff;
  padding: var(--spacing-3xl);
  padding-left: var(--spacing-2xl);
}

/* Breadcrumb */
.help-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xl);
  font-size: 16px;
  color: #666666;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
}

.help-breadcrumb-link {
  color: #2B63F8;
  text-decoration: none;
  transition: color var(--transition-base);
}

.help-breadcrumb-link:hover {
  color: #1a4fd8;
}

.help-breadcrumb-separator {
  color: #999999;
}

.help-breadcrumb-current {
  color: #333333;
}

/* Content Title */
.help-content-title {
  font-size: 32px;
  font-weight: var(--font-weight-bold);
  color: #333333;
  margin-bottom: var(--spacing-3xl);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  line-height: 1.4;
}

/* Content Steps */
.help-content-steps {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3xl);
}

.help-step {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.help-step-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.help-step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: #2B63F8;
  color: #ffffff;
  border-radius: 50%;
  font-size: 20px;
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
}

.help-step-title {
  font-size: 24px;
  font-weight: var(--font-weight-semibold);
  color: #333333;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  line-height: 1.4;
}

.help-step-desc {
  font-size: 16px;
  color: #666666;
  line-height: 1.8;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  margin: 0;
  padding-left: calc(40px + var(--spacing-md));
}

.help-step-icons {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  padding-left: calc(40px + var(--spacing-md));
}

.help-step-icon-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.help-step-icon-box {
  width: 80px;
  height: 80px;
  background-color: #EBEFF8;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: var(--font-weight-semibold);
  color: #333333;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
}

.help-step-icon-label {
  font-size: 14px;
  color: #666666;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
}

.help-step-image {
  padding-left: calc(40px + var(--spacing-md));
}

.help-step-image-placeholder {
  width: 100%;
  min-height: 300px;
  background-color: #f5f5f5;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #999999;
  font-size: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  padding: var(--spacing-xl);
  text-align: center;
}

/* Article Navigation */
.help-article-nav {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid #f0f0f0;
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-xl);
}

.help-nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 16px;
  color: #2B63F8;
  text-decoration: none;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  transition: all var(--transition-base);
  flex: 1;
  padding: var(--spacing-md);
  border-radius: 8px;
}

.help-nav-link:hover {
  background-color: #f5f5f5;
  color: #1a4fd8;
}

.help-nav-prev {
  text-align: left;
}

.help-nav-next {
  text-align: right;
  flex-direction: row-reverse;
}

.help-nav-arrow {
  font-size: 20px;
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
}

.help-nav-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  flex: 1;
}

.help-nav-label {
  font-size: 14px;
  color: #999999;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
}

.help-nav-title {
  font-size: 16px;
  color: #333333;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "PingFang TC", "Microsoft YaHei UI", sans-serif;
  line-height: 1.4;
}

.help-nav-link:hover .help-nav-title {
  color: #2B63F8;
}

/* Responsive Styles */
@media (max-width: 1200px) {
  .help-detail-layout {
    grid-template-columns: 300px 1fr;
  }

  .help-detail-layout::before {
    left: 300px;
  }

  .help-content {
    padding: var(--spacing-2xl);
    padding-left: var(--spacing-xl);
  }
}

@media (max-width: 768px) {
  .help-center-hero-section {
    padding: var(--spacing-2xl) 0;
    min-height: 300px;
  }
  .help-detail-layout::before {
   width: 0 !important;
  }
  .help-center-hero-title {
    font-size: 32px;
  }

  .help-center-hero-subtitle {
    font-size: 16px;
  }

  .help-detail-section {
    padding: var(--spacing-2xl) 0;
  }

  .help-detail-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .help-detail-layout::after {
    display: none;
  }

  .help-sidebar {
    position: static;
  }

  .help-content {
    padding: var(--spacing-xl);
  }

  .help-content-title {
    font-size: 24px;
    margin-bottom: var(--spacing-2xl);
  }

  .help-step-title {
    font-size: 20px;
  }

  .help-step-desc {
    font-size: 15px;
    padding-left: 0;
  }

  .help-step-icons {
    padding-left: 0;
  }

  .help-step-image {
    padding-left: 0;
  }
}

@media (max-width: 480px) {
  .help-center-hero-title {
    font-size: 28px;
  }

  .help-center-hero-subtitle {
    font-size: 14px;
  }

  .help-content {
    padding: var(--spacing-lg);
  }

  .help-content-title {
    font-size: 20px;
  }

  .help-step-number {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .help-step-title {
    font-size: 18px;
  }

  .help-step-desc {
    font-size: 14px;
  }

  .help-step-icon-box {
    width: 60px;
    height: 60px;
    font-size: 12px;
  }

  .help-step-icon-label {
    font-size: 12px;
  }

  .help-article-nav {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .help-nav-link {
    width: 100%;
  }

  .help-nav-next {
    flex-direction: row;
  }
}