/* 使用 pico.css 作为基础，仅添加必要覆盖 */
:root {
  --pico-font-family: "Helvetica Neue", "PingFang SC", "Source Han Sans CN", sans-serif;
  --pico-font-size: 16px;
  --pico-line-height: 1.7;
  
  /* 中性背景色 */
  --pico-background-color: #f8f5f0;
  --pico-muted-background-color: #f0ede9;
  --pico-surface-background-color: #ffffff;
  
  /* 文字颜色 */
  --pico-color: #2d2d2d;
  --pico-muted-color: #6b6b6b;
  --pico-strong-color: #000000;
  
  /* 强调色 */
  --pico-primary: #2d2d2d;
  --pico-primary-hover: #000000;
  --pico-primary-focus: rgba(45, 45, 45, 0.2);
  
  /* 边框与阴影 */
  --pico-border-radius: 4px;
  --pico-box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

body {
  background-color: var(--pico-background-color);
  color: var(--pico-color);
  font-family: var(--pico-font-family);
  line-height: var(--pico-line-height);
  margin: 0;
  padding: 0;
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--pico-surface-background-color);
  box-shadow: var(--pico-box-shadow);
  padding: 1rem 2rem;
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--pico-color);
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--pico-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* 主内容区域 */
main {
  margin-top: 80px;
  padding: 2rem 1rem;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

/* 页脚样式 */
footer {
  text-align: center;
  padding: 2rem 1rem;
  background-color: var(--pico-muted-background-color);
  color: var(--pico-muted-color);
  font-size: 0.9rem;
  margin-top: 4rem;
}

/* 首页轮播图 */
.hero-slider {
  position: relative;
  width: 100%;
  height: 60vh;
  overflow: hidden;
  border-radius: var(--pico-border-radius);
  margin-bottom: 3rem;
}

.slider-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: none;
}

.slider-image.active {
  display: block;
}

.slider-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
  padding: 2rem;
  color: white;
}

.slider-title {
  font-size: 2.5rem;
  font-weight: 300;
  margin: 0;
}

.slider-controls {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
}

.slider-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.slider-dot.active {
  background-color: white;
}

/* 系列卡片 */
.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.collection-card {
  background: var(--pico-surface-background-color);
  border-radius: var(--pico-border-radius);
  overflow: hidden;
  box-shadow: var(--pico-box-shadow);
  transition: transform 0.3s ease;
}

.collection-card:hover {
  transform: translateY(-5px);
}

.collection-image {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.collection-title {
  padding: 1.5rem;
  font-size: 1.25rem;
  margin: 0;
}

.collection-desc {
  padding: 0 1.5rem 1.5rem;
  color: var(--pico-muted-color);
  font-size: 0.95rem;
}

/* 设计理念区 */
.philosophy-section {
  display: flex;
  gap: 3rem;
  margin: 4rem 0;
  align-items: center;
}

.philosophy-text {
  flex: 1;
}

.philosophy-image {
  flex: 1;
  border-radius: var(--pico-border-radius);
  overflow: hidden;
  box-shadow: var(--pico-box-shadow);
}

.philosophy-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* 风格图库 */
.gallery-filters {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin: 2rem 0 3rem;
  flex-wrap: wrap;
}

.filter-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.gallery-item {
  position: relative;
  border-radius: var(--pico-border-radius);
  overflow: hidden;
  box-shadow: var(--pico-box-shadow);
  transition: transform 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.03);
}

.gallery-image {
  width: 100%;
  height: 350px;
  object-fit: cover;
  display: block;
}

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: white;
  padding: 1.5rem 1rem 0.5rem;
  font-size: 0.95rem;
}

/* 设计故事时间线 */
.story-timeline {
  position: relative;
  max-width: 800px;
  margin: 3rem auto;
}

.story-timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--pico-muted-color);
  left: 50%;
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  margin-bottom: 3rem;
  position: relative;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  flex: 1;
  padding: 0 2rem;
}

.timeline-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--pico-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.timeline-image {
  width: 100%;
  border-radius: var(--pico-border-radius);
  margin-top: 1rem;
  box-shadow: var(--pico-box-shadow);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .navbar-container {
    flex-direction: column;
    gap: 1rem;
  }
  
  .philosophy-section {
    flex-direction: column;
  }
  
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline-item {
    flex-direction: column !important;
    padding-left: 3rem;
  }
  
  .timeline-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 15px;
    width: 2px;
    height: 100%;
    background: var(--pico-muted-color);
  }
  
  .timeline-icon {
    left: 0;
    transform: none;
  }
  
  .timeline-content {
    padding: 0;
  }
  
  .slider-title {
    font-size: 2rem;
  }
}