/* 帮助中心页面样式 */

/* 页面头部样式优化 */
.page-header {
  background: linear-gradient(to bottom, var(--dark-color), #2a507a);
  padding: 8rem 0 6rem;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100" preserveAspectRatio="none"%3E%3Cpath fill="rgba(255, 255, 255, 0.05)" d="M0 0h100v100H0z"/%3E%3C/svg%3E');
  opacity: 0.5;
}

.page-header h1 {
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
}

.page-header p {
  font-size: 1.1rem;
  max-width: 2xl;
  margin: 0 auto;
  opacity: 0.95;
  position: relative;
  z-index: 1;
}

/* 帮助搜索区域 */
.help-search-section {
  padding: 3rem 0;
  margin-top: -4rem;
  position: relative;
  z-index: 2;
}

.help-search {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.help-search:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 10px 25px -5px rgba(0, 0, 0, 0.05);
}

.help-search .input-group {
  position: relative;
}

.help-search .form-control {
  height: 3.5rem;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-right: none;
  border-radius: var(--border-radius-lg) 0 0 var(--border-radius-lg);
  transition: all 0.3s ease;
}

.help-search .form-control:focus {
  border-color: var(--primary-color);
  box-shadow: var(--focus-ring);
}

.help-search .btn {
  height: 3.5rem;
  min-width: 3.5rem;
  border-radius: 0 var(--border-radius-lg) var(--border-radius-lg) 0;
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  transition: all 0.3s ease;
}

.help-search .btn:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.search-suggestions {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.search-suggestions a {
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.search-suggestions a:hover {
  color: var(--primary-color);
  background-color: rgba(var(--primary-rgb), 0.05);
}

/* 帮助内容区域 */
.help-content {
  padding: 4rem 0;
  background-color: var(--bg-muted);
}

/* 侧边栏样式 */
.help-sidebar {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  position: sticky;
  top: 6rem;
}

.help-sidebar h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.sidebar-nav {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar-nav-item {
  display: block;
  padding: 0.75rem 1rem;
  margin-bottom: 0.25rem;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: all 0.2s ease;
  text-decoration: none;
}

.sidebar-nav-item:hover {
  color: var(--primary-color);
  background-color: rgba(var(--primary-rgb), 0.05);
  text-decoration: none;
}

.sidebar-nav-item.active {
  color: var(--primary-color);
  background-color: rgba(var(--primary-rgb), 0.1);
  font-weight: 500;
}

/* 帮助分类卡片 */
.help-category-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  transition: all 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.help-category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.help-icon {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.help-category-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.help-category-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
  flex-grow: 1;
}

.help-category-card a {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--primary-color);
  text-decoration: none;
  transition: all 0.2s ease;
}

.help-category-card a:hover {
  color: var(--primary-dark);
}

.help-category-card a i {
  margin-left: 0.25rem;
  transition: transform 0.2s ease;
}

.help-category-card a:hover i {
  transform: translateX(3px);
}

/* 帮助文章卡片 */
.help-article-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.help-article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
}

.help-article-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.help-article-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.help-article-card a {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--primary-color);
  text-decoration: none;
  transition: all 0.2s ease;
}

.help-article-card a:hover {
  color: var(--primary-dark);
}

.help-article-card a i {
  margin-left: 0.25rem;
  transition: transform 0.2s ease;
}

.help-article-card a:hover i {
  transform: translateX(3px);
}

/* 手风琴样式定制 */
.accordion {
  --bs-accordion-bg: var(--bg-card);
  --bs-accordion-color: var(--text-primary);
  --bs-accordion-border-color: var(--border-color);
  --bs-accordion-border-radius: var(--border-radius-lg);
  --bs-accordion-inner-border-radius: calc(var(--border-radius-lg) - 1px);
  --bs-accordion-btn-padding-x: 1.5rem;
  --bs-accordion-btn-padding-y: 1rem;
  --bs-accordion-btn-focus-box-shadow: var(--focus-ring);
  --bs-accordion-active-bg: rgba(var(--primary-rgb), 0.05);
  --bs-accordion-active-color: var(--primary-color);
}

.accordion-item {
  margin-bottom: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.3s ease;
}

.accordion-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow);
}

.accordion-header {
  padding: 0;
}

.accordion-button {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  background-color: var(--bg-card);
  border: none;
  border-radius: var(--border-radius-lg);
  transition: all 0.3s ease;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.accordion-button:hover:not(.collapsed) {
  background-color: rgba(var(--primary-rgb), 0.05);
  color: var(--primary-color);
}

.accordion-button.collapsed {
  border-radius: var(--border-radius-lg);
}

.accordion-button:not(.collapsed) {
  box-shadow: none;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.accordion-button::after {
  content: '\f107';
  font-family: 'Bootstrap Icons';
  background-image: none;
  width: auto;
  height: auto;
  font-size: 1rem;
  margin-left: auto;
  transition: transform 0.3s ease;
}

.accordion-button:not(.collapsed)::after {
  content: '\f106';
  transform: none;
}

.accordion-body {
  padding: 1rem 1.5rem 1.5rem;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

.accordion-body p {
  margin-bottom: 0;
  line-height: 1.7;
  color: var(--text-secondary);
}

.accordion-body br {
  margin: 0.5rem 0;
}

/* 查看更多按钮 */
.text-center.mt-6 a {
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
}

/* 联系技术支持区域 */
.contact-support {
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.contact-support::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100" preserveAspectRatio="none"%3E%3Cpath fill="rgba(255, 255, 255, 0.05)" d="M0 0h100v100H0z"/%3E%3C/svg%3E');
}

.contact-support h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: white;
  position: relative;
  z-index: 1;
}

.contact-support p {
  font-size: 1.1rem;
  max-width: 3xl;
  margin: 0 auto 2.5rem;
  opacity: 0.9;
  position: relative;
  z-index: 1;
}

.contact-support .flex {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.contact-support .btn {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

.contact-support .btn-primary {
  background-color: white;
  color: var(--primary-color);
  border-color: white;
}

.contact-support .btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--primary-dark);
  border-color: rgba(255, 255, 255, 0.9);
}

.contact-support .btn-outline-primary {
  background-color: transparent;
  color: white;
  border-color: white;
}

.contact-support .btn-outline-primary:hover {
  background-color: white;
  color: var(--primary-color);
}

/* 返回顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

/* 响应式设计 */
@media (max-width: 992px) {
  .page-header {
    padding: 6rem 0 4rem;
  }
  
  .help-sidebar {
    position: static;
    margin-bottom: 2rem;
  }
  
  .contact-support .flex {
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }
  
  .contact-support .btn {
    width: 100%;
    max-width: 280px;
  }
}

@media (max-width: 768px) {
  .page-header h1 {
    font-size: 2rem;
  }
  
  .page-header p {
    font-size: 1rem;
  }
  
  .help-search {
    padding: 1.25rem;
  }
  
  .help-category-card,
  .help-article-card {
    padding: 1.25rem;
  }
  
  .accordion-button {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
  
  .accordion-body {
    padding: 1rem 1.25rem;
  }
  
  .contact-support h2 {
    font-size: 1.75rem;
  }
  
  .contact-support p {
    font-size: 1rem;
  }
}

@media (max-width: 576px) {
  .page-header {
    padding: 5rem 0 3rem;
  }
  
  .page-header h1 {
    font-size: 1.75rem;
  }
  
  .help-search-section {
    margin-top: -3rem;
  }
  
  .search-suggestions {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .search-suggestions a {
    margin-bottom: 0.5rem;
  }
  
  .help-sidebar {
    padding: 1rem;
  }
  
  .sidebar-nav-item {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }
  
  .help-category-card,
  .help-article-card {
    padding: 1rem;
  }
  
  .back-to-top {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1rem;
    bottom: 1.5rem;
    right: 1.5rem;
  }
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}

/* 打印样式 */
@media print {
  .navbar,
  .back-to-top,
  .contact-support {
    display: none !important;
  }
  
  .help-sidebar {
    position: static;
    border: 1px solid #ddd;
  }
  
  .help-category-card,
  .help-article-card {
    border: 1px solid #ddd;
    box-shadow: none;
    break-inside: avoid;
    page-break-inside: avoid;
  }
}