/* 毛玻璃效果样式系统 */

/* 毛玻璃卡片基础样式 */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
}

/* 毛玻璃卡片内边距变体 */
.glass-card.padding-sm { padding: var(--space-sm); }
.glass-card.padding-md { padding: var(--space-md); }
.glass-card.padding-lg { padding: var(--space-lg); }
.glass-card.padding-xl { padding: var(--space-xl); }

/* 毛玻璃导航栏 */
.glass-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: hsla(220, 25%, 15%, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* 导航品牌 */
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: var(--text-xl);
}

.logo-icon {
  width: 28px;
  height: 28px;
  stroke: var(--color-primary);
}

.brand-text {
  background: linear-gradient(135deg, 
    var(--color-primary) 0%, 
    var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--glass-bg);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

.nav-item:hover::before,
.nav-item.active::before {
  opacity: 1;
}

.nav-item:hover,
.nav-item.active {
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

.nav-item.active {
  color: var(--color-primary);
}

.nav-icon {
  width: 18px;
  height: 18px;
}

/* 导航操作按钮 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.action-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  background: transparent;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.action-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--glass-bg);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.action-btn:hover::before {
  opacity: 1;
}

.action-btn:hover {
  color: var(--color-primary);
  transform: translateY(-2px);
}

.action-btn svg {
  width: 20px;
  height: 20px;
  z-index: 1;
}

/* 英雄区域 */
.hero-section {
  padding: var(--space-2xl) var(--space-lg);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
}

.hero-card {
  max-width: 800px;
  padding: var(--space-2xl);
  text-align: center;
  position: relative;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, 
    hsla(var(--primary-hue), 60%, 65%, 0.3) 0%,
    hsla(var(--accent-hue), 50%, 55%, 0.2) 50%,
    hsla(var(--secondary-hue), 70%, 60%, 0.1) 100%);
  border-radius: var(--radius-lg);
  z-index: -1;
  opacity: 0.6;
  filter: blur(1px);
}

.hero-content {
  z-index: 1;
  position: relative;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.title-line {
  display: block;
}

.title-line.highlight {
  background: linear-gradient(135deg, 
    var(--color-primary) 0%, 
    var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* 统计信息 */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  margin-top: var(--space-xl);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.stat-number {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-primary);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* 搜索覆层 */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  background: hsla(220, 25%, 8%, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--space-2xl);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-card {
  width: 100%;
  max-width: 600px;
  padding: var(--space-xl);
  margin-top: 10vh;
  transform: translateY(-20px);
  transition: transform var(--transition-base);
}

.search-overlay.active .search-card {
  transform: translateY(0);
}

.search-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.search-header h3 {
  font-size: var(--text-xl);
  font-weight: 600;
}

.close-search {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.close-search:hover {
  color: var(--color-text-primary);
  background: var(--glass-bg);
}

.search-input-container {
  position: relative;
  margin-bottom: var(--space-xl);
}

.search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: var(--space-md) var(--space-md) var(--space-md) calc(var(--space-md) * 2.5);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--text-lg);
  font-family: inherit;
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px hsla(var(--primary-hue), 60%, 65%, 0.1);
}

.search-suggestions h4 {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.suggestion-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.suggestion-tag {
  padding: var(--space-xs) var(--space-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.suggestion-tag:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-container {
    padding: 0 var(--space-md);
    height: 60px;
  }
  
  .nav-menu {
    display: none;
  }
  
  .hero-section {
    padding: var(--space-xl) var(--space-md);
    min-height: 70vh;
  }
  
  .hero-card {
    padding: var(--space-xl);
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .search-overlay {
    padding: var(--space-lg);
  }
  
  .search-card {
    padding: var(--space-lg);
    margin-top: 5vh;
  }
}

/* 平板设备 */
@media (max-width: 1024px) and (min-width: 769px) {
  .nav-menu {
    gap: 0;
  }
  
  .nav-item span {
    display: none;
  }
  
  .hero-stats {
    gap: var(--space-xl);
  }
}

/* 毛玻璃效果增强 */
@supports (backdrop-filter: blur(12px)) {
  .glass-card {
    background: hsla(220, 25%, 15%, 0.3);
  }
  
  .glass-nav {
    background: hsla(220, 25%, 15%, 0.5);
  }
}