/* ============================================
   桌面端专用样式 v2.0
   宽敞、优雅、现代
   ============================================ */

/* ============================================
   首页Hero区域（全新设计）
   ============================================ */
.home-hero {
  background: var(--primary-gradient);
  border-radius: 20px;
  padding: 56px 48px 40px;
  color: white;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}

.home-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.07);
}

.hero-blob-1 {
  width: 360px; height: 360px;
  top: -120px; right: -60px;
}

.hero-blob-2 {
  width: 200px; height: 200px;
  bottom: -40px; right: 200px;
  background: rgba(255,255,255,0.05);
}

.hero-blob-3 {
  width: 140px; height: 140px;
  top: 40px; left: 40%;
  background: rgba(255,255,255,0.04);
}

.home-hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
}

.home-hero-text {
  max-width: 520px;
}

.home-hero-text h1 {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
  margin: 0 0 16px;
}

.home-hero-text .hero-highlight {
  color: rgba(255,255,255,0.4);
  margin: 0 4px;
}

.home-hero-text p {
  font-size: 15px;
  line-height: 1.7;
  opacity: 0.85;
  margin: 0 0 28px;
}

.home-hero-actions {
  display: flex;
  gap: 12px;
}

.hero-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
}

.hero-btn-primary {
  background: white;
  color: var(--primary);
}

.hero-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.hero-btn-outline {
  border: 1.5px solid rgba(255,255,255,0.45);
  color: white;
  background: transparent;
}

.hero-btn-outline:hover {
  border-color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.1);
}

.home-hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(0,0,0,0.1);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 14px;
  padding: 16px 28px;
  flex-shrink: 0;
}

.hero-stat {
  text-align: center;
  padding: 0 18px;
}

.hero-stat-num {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero-stat-num span {
  font-size: 16px;
  font-weight: 600;
  opacity: 0.7;
}

.hero-stat-label {
  font-size: 12px;
  opacity: 0.7;
  margin-top: 2px;
}

.hero-stat-divider {
  width: 1px;
  height: 32px;
  background: rgba(255,255,255,0.2);
}

/* ============================================
   通用区块
   ============================================ */
.home-section {
  margin-bottom: 40px;
}

.home-section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 20px;
}

.home-section-head h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 2px;
  letter-spacing: -0.01em;
}

.home-section-desc {
  font-size: 13px;
  color: var(--text-tertiary);
  margin: 0;
}

.home-section-more {
  font-size: 13px;
  color: var(--text-tertiary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
  white-space: nowrap;
}

.home-section-more .arrow {
  display: inline-block;
  transition: transform 0.2s;
}

.home-section-more:hover {
  color: var(--primary);
}

.home-section-more:hover .arrow {
  transform: translateX(3px);
}

/* ============================================
   功能导航
   ============================================ */
.home-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.home-feature-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  background: var(--bg-card);
  border-radius: 14px;
  border: 1px solid var(--border-light);
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.home-feature-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  border-color: transparent;
}

.home-feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.home-feature-icon svg {
  color: white;
}

.home-feature-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.005em;
}

/* ============================================
   课程网格
   ============================================ */
.home-course-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.home-course-card {
  background: var(--bg-card);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.home-course-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
}

.home-course-cover {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #f0f0f5, #e8e8f0);
  position: relative;
  overflow: hidden;
}

.home-course-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.home-course-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.3;
}

.home-course-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.2);
  opacity: 0;
  transition: opacity 0.3s;
}

.home-course-card:hover .home-course-play {
  opacity: 1;
}

.home-course-play svg {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  padding: 10px;
  color: var(--primary);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.home-course-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.65);
  color: white;
  font-size: 11px;
  padding: 3px 7px;
  border-radius: 5px;
  backdrop-filter: blur(4px);
}

.home-course-body {
  padding: 14px 16px 16px;
}

.home-course-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--text-primary);
}

.home-course-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.home-course-tag {
  font-size: 12px;
  padding: 3px 9px;
  border-radius: 5px;
  font-weight: 600;
}

.home-course-tag.tag-free { background: #EDFFF3; color: #34C759; }
.home-course-tag.tag-paid { background: var(--primary-bg); color: var(--primary); }

.home-course-views {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============================================
   两栏布局（问答 + 交流圈）
   ============================================ */
.home-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

/* 问答列表 */
.home-qa-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.home-qa-item {
  display: block;
  background: var(--bg-card);
  border-radius: 12px;
  padding: 16px 20px;
  border: 1px solid var(--border-light);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s;
}

.home-qa-item:hover {
  border-color: var(--primary-light);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.home-qa-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.home-qa-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.home-qa-user {
  color: var(--text-secondary);
  font-weight: 500;
}

.home-qa-stats {
  color: var(--text-tertiary);
}

.home-qa-dot {
  color: var(--border-color);
}

/* 交流圈列表 */
.home-feed-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.home-feed-item {
  display: block;
  background: var(--bg-card);
  border-radius: 12px;
  padding: 16px 20px;
  border: 1px solid var(--border-light);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s;
}

.home-feed-item:hover {
  border-color: var(--primary-light);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.home-feed-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.home-feed-nickname {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.home-feed-badge {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--primary-bg);
  color: var(--primary);
  font-weight: 600;
}

.home-feed-time {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-tertiary);
}

.home-feed-content {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.home-feed-actions {
  display: flex;
  gap: 18px;
}

.home-feed-action {
  font-size: 12px;
  color: var(--text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.home-feed-action svg {
  color: var(--text-tertiary);
}

/* ============================================
   商品网格
   ============================================ */
.home-product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.home-product-card {
  background: var(--bg-card);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  text-decoration: none;
  color: inherit;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.home-product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
}

.home-product-cover {
  aspect-ratio: 1;
  background: var(--bg-page);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.home-product-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.home-product-placeholder {
  opacity: 0.25;
}

.home-product-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(94,139,255,0.9);
  color: white;
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 5px;
  backdrop-filter: blur(4px);
}

.home-product-discount {
  position: absolute;
  top: 8px;
  left: 8px;
  background: #FF4530;
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 7px;
  border-radius: 5px;
}

.home-product-body {
  padding: 12px 16px 16px;
}

.home-product-name {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--text-primary);
}

.home-product-subtitle {
  font-size: 12px;
  color: var(--text-tertiary);
  margin: 0 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.home-product-price-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.home-product-price {
  font-size: 18px;
  font-weight: 700;
  color: #FF4530;
}

.home-product-original {
  font-size: 12px;
  color: var(--text-tertiary);
  text-decoration: line-through;
}

/* ============================================
   百科网格
   ============================================ */
.home-wiki-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.home-wiki-card {
  display: flex;
  background: var(--bg-card);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  text-decoration: none;
  color: inherit;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.home-wiki-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
  border-color: transparent;
}

.home-wiki-cover {
  width: 120px;
  flex-shrink: 0;
  background: linear-gradient(135deg, #f0f0f5, #e8e8f0);
}

.home-wiki-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.home-wiki-body {
  flex: 1;
  padding: 16px;
  min-width: 0;
}

.home-wiki-cat {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--info-bg);
  color: var(--info);
  font-weight: 600;
  margin-bottom: 8px;
}

.home-wiki-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  margin: 0 0 6px;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.home-wiki-summary {
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.5;
  margin: 0 0 8px;
}

.home-wiki-views {
  font-size: 11px;
  color: var(--text-tertiary);
}

/* ============================================
   旧类名保留 — 仅隐藏首页已不再使用的
   （desktop-product/course-grid/card、desktop-qa-card 等
    被大量页面依赖，切勿 display:none！）
   ============================================ */
.desktop-hero { display: none; }
.desktop-features { display: none; }
.desktop-section-header { display: none; }
.desktop-section { margin-bottom: 40px; }

/* 旧版商品网格（商城列表页等仍在使用） */
.desktop-product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.desktop-product-card {
  background: var(--bg-card);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: all 0.25s;
  cursor: pointer;
}
.desktop-product-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* 旧版课程网格（课程详情页的"相关课程"等仍在使用） */
.desktop-course-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.desktop-course-card {
  background: var(--bg-card);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: all 0.25s;
}
.desktop-course-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* 旧版通用卡片（疫苗、QA详情、宝宝管理等大量页面依赖） */
.desktop-qa-card {
  background: var(--bg-card);
  border-radius: 14px;
  border: 1px solid var(--border-light);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.desktop-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1100px) {
  .home-hero-content { flex-direction: column; align-items: flex-start; }
  .home-hero-stats { width: 100%; justify-content: center; }
  .home-features { grid-template-columns: repeat(4, 1fr); }
  .home-course-grid { grid-template-columns: repeat(3, 1fr); }
  .home-product-grid { grid-template-columns: repeat(3, 1fr); }
  .home-wiki-grid { grid-template-columns: repeat(2, 1fr); }
  .home-two-col { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .home-hero { padding: 32px 24px 28px; border-radius: 16px; }
  .home-hero-text h1 { font-size: 28px; }
  .home-hero-stats { padding: 12px 16px; }
  .hero-stat { padding: 0 12px; }
  .hero-stat-num { font-size: 22px; }
  .home-features { grid-template-columns: repeat(2, 1fr); }
  .home-course-grid { grid-template-columns: repeat(2, 1fr); }
  .home-product-grid { grid-template-columns: repeat(2, 1fr); }
  .home-wiki-grid { grid-template-columns: 1fr; }
  .home-two-col { grid-template-columns: 1fr; }
}

/* 桌面端页脚 - 精致 */
.desktop-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-light);
  margin-top: var(--space-3xl);
  padding: var(--space-2xl) 0 0;
}

.desktop-footer-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.footer-brand .brand-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand .brand-desc {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  line-height: 1.6;
}

.footer-section h5 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

.footer-section a {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
  transition: var(--transition-fast);
}

.footer-section a:hover {
  color: var(--primary);
}

.footer-copyright {
  text-align: center;
  padding: var(--space-lg);
  margin-top: var(--space-xl);
  border-top: 1px solid var(--border-light);
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

/* 桌面端登录/注册页 */
.desktop-auth-container {
  min-height: 100vh;
  display: flex;
}

.desktop-auth-left {
  flex: 1;
  background: var(--primary-gradient);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-3xl);
  color: white;
  position: relative;
  overflow: hidden;
}

.desktop-auth-left::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
}

.desktop-auth-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3xl);
  background: var(--bg-page);
}

.desktop-auth-form {
  width: 100%;
  max-width: 420px;
}

/* 桌面端用户中心 - 侧边栏布局 */
.desktop-profile-sidebar {
  background: var(--primary-gradient);
  border-radius: var(--border-radius-2xl);
  padding: var(--space-xl);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.desktop-profile-sidebar::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -30%;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
}

.desktop-profile-avatar {
  width: 96px;
  height: 96px;
  border-radius: var(--border-radius-full);
  border: 3px solid rgba(255,255,255,0.25);
  margin: 0 auto var(--space-md);
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 44px;
}

/* 桌面端统计卡片 */
.desktop-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.desktop-stat-item {
  background: var(--bg-card);
  border-radius: var(--border-radius);
  padding: var(--space-md) var(--space-sm);
  text-align: center;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
}

.desktop-stat-num {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.01em;
}

.desktop-stat-label {
  font-size: var(--font-size-xs);
  color: var(--text-tertiary);
}

/* 桌面端功能菜单网格 */
.desktop-menu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.desktop-menu-item {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  text-align: center;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  cursor: pointer;
}

.desktop-menu-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.desktop-menu-item .menu-icon {
  font-size: 36px;
  margin-bottom: var(--space-sm);
}

.desktop-menu-item .menu-label {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

@media (max-width: 1024px) {
  .desktop-features { grid-template-columns: repeat(3, 1fr); }
  .desktop-course-grid { grid-template-columns: repeat(2, 1fr); }
  .desktop-product-grid { grid-template-columns: repeat(2, 1fr); }
  .desktop-menu-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .desktop-auth-left { display: none; }
  .desktop-features { grid-template-columns: repeat(3, 1fr); }
  .desktop-course-grid { grid-template-columns: repeat(2, 1fr); }
  .desktop-product-grid { grid-template-columns: repeat(2, 1fr); }
  .desktop-qa-list { grid-template-columns: 1fr; }
  .desktop-two-col { grid-template-columns: 1fr; }
  .desktop-three-col { grid-template-columns: 1fr; }
  .desktop-footer-inner { grid-template-columns: 1fr 1fr; }
}