/* 全局样式重置与配置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg-primary: #faf9f7;
  --color-bg-secondary: #ffffff;
  --color-text-primary: #2d2d2d;
  --color-text-secondary: #6b6b6b;
  --color-accent-rose: #d4a5a5;
  --color-accent-blue: #9db4c0;
  --color-accent-clay: #c39b7a;
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.8;
  overflow-x: hidden;
}

/* 导航栏样式 */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 249, 247, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(45, 45, 45, 0.05);
}

.nav-link {
  position: relative;
  transition: var(--transition-fast);
  font-size: 14px;
  letter-spacing: 1px;
}

.nav-link:hover {
  color: var(--color-text-secondary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-text-primary);
}

/* 轮播图样式 */
.carousel-container {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.carousel-slide {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.carousel-slide.active {
  opacity: 1;
  z-index: 1;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.9);
}

.carousel-caption {
  position: absolute;
  bottom: 20%;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: #ffffff;
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: 3px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 1.2s ease-out;
}

/* 图片网格布局 */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.image-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 3/4;
}

.image-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

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

.image-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(45, 45, 45, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-smooth);
  color: #ffffff;
  font-size: 1rem;
  letter-spacing: 1px;
  text-align: center;
  padding: 1rem;
}

.image-item:hover .image-overlay {
  opacity: 1;
}

/* 设计哲学模块 */
.philosophy-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-text-secondary);
  border-radius: 50%;
  transition: var(--transition-smooth);
}

.philosophy-item:hover .philosophy-icon {
  transform: translateY(-5px);
  border-color: var(--color-accent-rose);
}

/* 分类标签 */
.category-tag {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  font-size: 14px;
  letter-spacing: 2px;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

/* 视频背景 */
.video-background {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.video-background video {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  transform: translate(-50%, -50%);
  object-fit: cover;
  filter: brightness(0.8);
}

/* 滚动触发动画 */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 页脚样式 */
.footer {
  text-align: center;
  padding: 3rem 1rem;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--color-text-secondary);
  border-top: 1px solid rgba(45, 45, 45, 0.05);
}

/* 响应式布局 */
@media (max-width: 768px) {
  .carousel-caption {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .philosophy-icon {
    width: 60px;
    height: 60px;
  }
}

/* 动画关键帧 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate(-50%, 20px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* 文字选中效果 */
::selection {
  background: var(--color-accent-rose);
  color: #ffffff;
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-text-secondary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-primary);
}