/* 基础样式与动画 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

:root {
  --primary-gray: #1a1a1a;
  --light-gray: #f8f8f8;
  --navy-blue: #1e3a5f;
  --camel: #c19a6b;
  --champagne: #f7e7ce;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6;
  color: var(--primary-gray);
}

/* 图片悬停效果 */
.image-hover {
  overflow: hidden;
  transition: var(--transition-smooth);
}

.image-hover img {
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-hover:hover img {
  transform: scale(1.05);
}

/* 导航栏下划线动画 */
.nav-link {
  position: relative;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary-gray);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* 灯箱效果 */
.lightbox {
  display: none;
  position: fixed;
  z-index: 999;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  animation: fadeIn 0.3s ease;
}

.lightbox.active {
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

/* 瀑布流布局 */
.masonry {
  column-count: 3;
  column-gap: 1.5rem;
}

@media (max-width: 768px) {
  .masonry {
    column-count: 2;
  }
}

@media (max-width: 480px) {
  .masonry {
    column-count: 1;
  }
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 1.5rem;
}

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

/* 色板模块 */
.color-swatch {
  transition: var(--transition-smooth);
}

.color-swatch:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* 动画关键帧 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

/* 滚动触发动画 */
.scroll-animate {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 轮播图容器 */
.carousel-container {
  position: relative;
  overflow: hidden;
}

.carousel-slide {
  transition: transform 0.6s ease-in-out;
}

/* 细节页面导航 */
.detail-nav {
  position: sticky;
  top: 6rem;
  transition: var(--transition-smooth);
}

.detail-nav-item {
  padding: 0.75rem 1.5rem;
  border-left: 2px solid transparent;
  transition: var(--transition-smooth);
}

.detail-nav-item:hover,
.detail-nav-item.active {
  border-left-color: var(--primary-gray);
  background: var(--light-gray);
}

/* 响应式字体大小 */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-gray);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #333;
}