:root {
  /* 清新浅蓝配色系统 - 与product.tpl保持一致 */
  --primary-color: #f8fafc;
  --primary-dark: #e2e8f0;
  --secondary-color: #f1f5f9;
  --accent-color: #0ea5e9;
  --accent-light: #7dd3fc;
  --accent-soft: #bae6fd;
  --accent-ultra-soft: #f0f9ff;
  --success-color: #06b6d4;
  --success-light: #67e8f9;
  --success-soft: #cffafe;
  --warning-color: #0891b2;
  --warning-soft: #a7f3d0;
  --danger-color: #ef4444;
  --danger-soft: #fecaca;
  
  /* 背景色 */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-soft: #e2e8f0;
  --bg-accent: #f0f9ff;
  
  /* 文字色 */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-muted: #cbd5e1;
  --text-accent: #0369a1;
  
  /* 边框色 */
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --border-soft: #cbd5e1;
  --border-accent: #bae6fd;
  
  /* 阴影 */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* 圆角 */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
}

/* 导航容器样式优化 */
.navigation-container {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
  padding: 2rem 0;
  margin-bottom: 1rem;
}

.firstgroup_box,
.secondgroup_box {
  min-height: 60px;
  padding: 1.5rem 2rem;
  background: var(--bg-primary);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  border-radius: var(--radius-2xl);
  margin-bottom: 1.5rem;
  border: 1px solid var(--border-light);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.firstgroup_box::before,
.secondgroup_box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-color), var(--success-color));
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
}

.firstgroup_box:hover,
.secondgroup_box:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-accent);
}

/* 标签样式优化 */
.firstgroup_box .firstgroup_box_prov,
.secondgroup_box .secondgroup_box_area {
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  min-width: 100px;
  font-weight: 700;
  font-size: 1rem;
  position: relative;
  padding-right: 2rem;
  margin-right: 1rem;
  background: var(--bg-accent);
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-accent);
  box-shadow: var(--shadow-xs);
  transition: all 0.3s ease;
}

.firstgroup_box .firstgroup_box_prov::before,
.secondgroup_box .secondgroup_box_area::before {
  content: '🏷️';
  margin-right: 0.5rem;
  font-size: 1rem;
}

.firstgroup_box .firstgroup_box_prov:after,
.secondgroup_box .secondgroup_box_area:after {
  content: "";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  background: var(--accent-color);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--accent-ultra-soft);
}

/* 分组容器优化 */
.firstgroup_box .firstgroup_box_group,
.secondgroup_box .secondgroup_box_group {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-left: 1rem;
}

/* 分类项目样式重新设计 */
.firstgroup_box .firstgroup_item,
.secondgroup_box .secondgroup_item,
.pro_box .pro_item {
  height: auto;
  min-height: 44px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}

.firstgroup_box .firstgroup_item::before,
.secondgroup_box .secondgroup_item::before,
.pro_box .pro_item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 0;
  background: linear-gradient(to bottom, var(--accent-color), var(--success-color));
  transition: width 0.3s ease;
  border-radius: var(--radius-xl) 0 0 var(--radius-xl);
}

.firstgroup_box .firstgroup_item:hover,
.secondgroup_box .secondgroup_item:hover,
.pro_box .pro_item:hover {
  transform: translateY(-3px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md);
  background: var(--bg-primary);
}

.firstgroup_box .firstgroup_item:hover::before,
.secondgroup_box .secondgroup_item:hover::before,
.pro_box .pro_item:hover::before {
  width: 4px;
}

/* 激活状态样式 */
.firstgroup_box .firstgroup_item.active,
.secondgroup_box .secondgroup_item.active,
.pro_box .pro_item.active {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--success-color) 100%);
  border-color: var(--accent-color);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.firstgroup_box .firstgroup_item.active::before,
.secondgroup_box .secondgroup_item.active::before,
.pro_box .pro_item.active::before {
  width: 0;
}

.firstgroup_box .firstgroup_item.active::after,
.secondgroup_box .secondgroup_item.active::after,
.pro_box .pro_item.active::after {
  content: '✓';
  position: absolute;
  top: 0.375rem;
  right: 0.375rem;
  width: 18px;
  height: 18px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 900;
  color: white;
}

/* 链接样式优化 */
.firstgroup_box a,
.secondgroup_box a,
.pro_box a,
.firstgroup_box .firstgroup_item,
.secondgroup_box .secondgroup_item,
.pro_box .pro_item {
  color: var(--text-secondary);
  min-width: 120px;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  line-height: 1.3;
  transition: all 0.3s ease;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  border-radius: var(--radius-xl);
  position: relative;
}

.firstgroup_box a:hover,
.secondgroup_box a:hover,
.pro_box a:hover,
.firstgroup_box .firstgroup_item:hover a,
.secondgroup_box .secondgroup_item:hover a,
.pro_box .pro_item:hover a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 700;
}

.firstgroup_box .firstgroup_item.active a,
.secondgroup_box .secondgroup_item.active a,
.pro_box .pro_item.active a {
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

/* 微妙的脉冲动画 */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

.firstgroup_box .firstgroup_item.active,
.secondgroup_box .secondgroup_item.active,
.pro_box .pro_item.active {
  animation: pulse 2s infinite;
}

/* 高级视觉效果 */
.firstgroup_box .firstgroup_item:hover,
.secondgroup_box .secondgroup_item:hover,
.pro_box .pro_item:hover {
  background: var(--bg-primary);
  position: relative;
}

.firstgroup_box .firstgroup_item:hover::after,
.secondgroup_box .secondgroup_item:hover::after,
.pro_box .pro_item:hover::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--accent-ultra-soft), var(--success-soft));
  border-radius: var(--radius-xl);
  z-index: -1;
}

/* 响应式设计优化 */
@media (max-width: 1200px) {
  .firstgroup_box,
  .secondgroup_box {
    padding: 1.25rem 1.5rem;
  }
  
  .firstgroup_box .firstgroup_box_prov,
  .secondgroup_box .secondgroup_box_area {
    min-width: 90px;
    font-size: 0.95rem;
    padding: 0.75rem 1.25rem;
  }
}

@media (max-width: 768px) {
  .navigation-container {
    padding: 1.5rem 0;
  }

  .firstgroup_box,
  .secondgroup_box {
    padding: 1.25rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    margin-bottom: 1rem;
  }

  .firstgroup_box .firstgroup_box_prov,
  .secondgroup_box .secondgroup_box_area {
    min-width: auto;
    margin-bottom: 0;
    margin-right: 0;
    font-size: 0.9rem;
    padding: 0.75rem 1rem;
    width: 100%;
    justify-content: center;
  }

  .firstgroup_box .firstgroup_box_prov:after,
  .secondgroup_box .secondgroup_box_area:after {
    display: none;
  }

  .firstgroup_box .firstgroup_box_group,
  .secondgroup_box .secondgroup_box_group {
    margin-left: 0;
    width: 100%;
    gap: 0.5rem;
  }

  .firstgroup_box .firstgroup_item,
  .secondgroup_box .secondgroup_item,
  .pro_box .pro_item {
    min-width: auto;
    flex: 1;
    min-height: 40px;
  }

  .firstgroup_box a,
  .secondgroup_box a,
  .pro_box a,
  .firstgroup_box .firstgroup_item,
  .secondgroup_box .secondgroup_item,
  .pro_box .pro_item {
    min-width: auto;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 576px) {
  .navigation-container {
    padding: 1rem 0;
  }

  .firstgroup_box,
  .secondgroup_box {
    padding: 1rem;
    margin-bottom: 0.75rem;
  }

  .firstgroup_box .firstgroup_box_group,
  .secondgroup_box .secondgroup_box_group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .firstgroup_item,
  .secondgroup_item {
    min-width: auto !important;
    width: auto !important;
    padding: 0 !important;
  }

  .firstgroup_box a,
  .secondgroup_box a,
  .pro_box a {
    padding: 0.625rem 0.75rem;
    font-size: 0.8rem;
    min-width: auto;
  }

  .firstgroup_box .firstgroup_box_prov,
  .secondgroup_box .secondgroup_box_area {
    padding: 0.625rem 0.875rem;
    font-size: 0.85rem;
  }
}

/* 加载动画 */
.navigation-container {
  animation: slideInDown 0.6s ease-out;
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 优雅的入场动画 */
.firstgroup_box .firstgroup_item,
.secondgroup_box .secondgroup_item {
  animation: fadeInUp 0.5s ease-out;
}

.firstgroup_box .firstgroup_item:nth-child(1) { animation-delay: 0.1s; }
.firstgroup_box .firstgroup_item:nth-child(2) { animation-delay: 0.2s; }
.firstgroup_box .firstgroup_item:nth-child(3) { animation-delay: 0.3s; }
.firstgroup_box .firstgroup_item:nth-child(4) { animation-delay: 0.4s; }
.firstgroup_box .firstgroup_item:nth-child(5) { animation-delay: 0.5s; }

.secondgroup_box .secondgroup_item:nth-child(1) { animation-delay: 0.15s; }
.secondgroup_box .secondgroup_item:nth-child(2) { animation-delay: 0.25s; }
.secondgroup_box .secondgroup_item:nth-child(3) { animation-delay: 0.35s; }
.secondgroup_box .secondgroup_item:nth-child(4) { animation-delay: 0.45s; }
.secondgroup_box .secondgroup_item:nth-child(5) { animation-delay: 0.55s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 高级交互效果 */
.firstgroup_box .firstgroup_item,
.secondgroup_box .secondgroup_item,
.pro_box .pro_item {
  cursor: pointer;
  user-select: none;
}

.firstgroup_box .firstgroup_item:active,
.secondgroup_box .secondgroup_item:active,
.pro_box .pro_item:active {
  transform: translateY(-1px) scale(0.98);
}

/* 聚焦状态优化 */
.firstgroup_box a:focus,
.secondgroup_box a:focus,
.pro_box a:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: var(--radius-lg);
}

/* 深色模式兼容性预留 */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #1e293b;
    --bg-secondary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
  }
}