/* 全局重置与基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-white: #ffffff;
  --color-light-gray: #f5f5f5;
  --color-beige: #f8f6f2;
  --color-taupe: #e8e4df;
  --color-dark-gray: #333333;
  --color-black: #000000;
  --font-cn: 'Source Han Sans CN', 'Noto Sans SC', sans-serif;
  --font-en: 'Helvetica Neue', Arial, sans-serif;
  --transition-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
}

body {
  font-family: var(--font-cn), var(--font-en);
  background-color: var(--color-white);
  color: var(--color-dark-gray);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.6s var(--transition-smooth);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 导航栏 */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 2rem 4rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.nav-menu {
  display: flex;
  gap: 4rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-dark-gray);
  transition: width 0.6s var(--transition-smooth);
}

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

/* 首页 - 全屏轮播 */
.hero-slider {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 2s var(--transition-smooth);
}

.slide.active {
  opacity: 1;
}

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

.slide-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--color-white);
  z-index: 10;
  width: 90%;
  max-width: 800px;
}

.slide-title {
  font-size: 3rem;
  font-weight: 200;
  letter-spacing: 0.15em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  margin-bottom: 1rem;
}

/* 引语区 */
.quote-section {
  padding: 6rem 2rem;
  text-align: center;
  background: var(--color-light-gray);
}

.quote-text {
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--color-dark-gray);
  max-width: 600px;
  margin: 0 auto;
  line-height: 2;
  letter-spacing: 0.05em;
}

/* 系列甄选页 - 标题 */
.page-header {
  padding: 10rem 2rem 4rem;
  text-align: center;
  background: var(--color-beige);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 200;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
}

/* 分类筛选 */
.filter-section {
  padding: 3rem 2rem;
  text-align: center;
  background: var(--color-white);
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}

.filter-btn {
  padding: 0.8rem 2rem;
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  border: 1px solid var(--color-dark-gray);
  background: transparent;
  color: var(--color-dark-gray);
  cursor: pointer;
  transition: all 0.4s var(--transition-smooth);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-dark-gray);
  color: var(--color-white);
}

/* 图片网格 */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  padding: 4rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

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

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--transition-smooth);
}

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

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.7);
  color: var(--color-white);
  padding: 2rem;
  transform: translateY(100%);
  transition: transform 0.6s var(--transition-smooth);
}

.gallery-item:hover .gallery-overlay {
  transform: translateY(0);
}

.item-description {
  font-size: 0.9rem;
  font-weight: 300;
  line-height: 1.8;
  letter-spacing: 0.05em;
}

/* 细节页面布局 */
.details-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  padding: 10rem 4rem 6rem;
  max-width: 1600px;
  margin: 0 auto;
}

.details-images {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.main-image {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
}

.detail-thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 1rem;
}

.thumb {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.4s var(--transition-smooth);
}

.thumb:hover,
.thumb.active {
  opacity: 1;
}

.details-content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.details-section {
  border-bottom: 1px solid var(--color-taupe);
  padding-bottom: 2rem;
}

.details-section:last-child {
  border: none;
}

.section-title {
  font-size: 1.2rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  color: var(--color-black);
}

.section-text {
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 2;
  letter-spacing: 0.05em;
  color: var(--color-dark-gray);
}

.back-link {
  display: inline-block;
  padding: 1rem 2.5rem;
  border: 1px solid var(--color-dark-gray);
  font-size: 0.9rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  transition: all 0.4s var(--transition-smooth);
}

.back-link:hover {
  background: var(--color-dark-gray);
  color: var(--color-white);
}

/* 页脚 */
.footer {
  padding: 3rem 2rem;
  text-align: center;
  background: var(--color-beige);
  border-top: 1px solid var(--color-taupe);
}

.footer-text {
  font-size: 0.85rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--color-dark-gray);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav {
    padding: 1.5rem 2rem;
  }

  .nav-menu {
    gap: 2rem;
  }

  .slide-title {
    font-size: 2rem;
  }

  .page-title {
    font-size: 1.8rem;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 2rem 1rem;
  }

  .details-container {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 8rem 2rem 4rem;
  }

  .filter-buttons {
    gap: 1rem;
  }

  .filter-btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.85rem;
  }
}

/* 加载动画 */
.fade-in {
  animation: fadeIn 1s var(--transition-smooth);
}

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