/* 全局变量 */
:root {
  --color-bg-primary: #FAFAFA;
  --color-bg-secondary: #FFFFFF;
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-accent-1: #D4B483;
  --color-accent-2: #A8B0A5;
  --color-border: #E0E0E0;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--color-accent-1);
}

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

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  transition: all 0.3s ease;
}

.nav-links a:hover {
  background-color: var(--color-accent-1);
  color: white;
}

.nav-links a.active {
  color: var(--color-accent-1);
}

/* 主容器 */
.main-content {
  margin-top: 70px;
  min-height: calc(100vh - 140px);
}

/* 轮播图 */
.hero-slider {
  position: relative;
  width: 100%;
  height: 90vh;
  overflow: hidden;
}

.slider-container {
  position: relative;
  width: 100%;
  height: 100%;
}

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

.slide.active {
  opacity: 1;
}

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

.slide-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-xl) var(--spacing-md);
  background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
  color: white;
}

.slide-text {
  max-width: 1400px;
  margin: 0 auto;
}

.slide-text h2 {
  font-size: 2.5rem;
  font-weight: 300;
  margin-bottom: var(--spacing-sm);
  letter-spacing: 2px;
}

.slide-text p {
  font-size: 1.1rem;
  font-weight: 300;
  max-width: 600px;
  line-height: 1.8;
}

/* 特色区块 */
.feature-section {
  max-width: 1400px;
  margin: var(--spacing-xl) auto;
  padding: 0 var(--spacing-md);
}

.section-intro {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-intro h2 {
  font-size: 2rem;
  font-weight: 400;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.section-intro p {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.8;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.feature-card {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
}

.feature-card img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.feature-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: white;
}

.feature-overlay h3 {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: var(--spacing-xs);
}

.feature-overlay p {
  font-size: 0.95rem;
  font-weight: 300;
  line-height: 1.6;
}

/* 内容区域 */
.content-section {
  max-width: 1400px;
  margin: var(--spacing-lg) auto;
  padding: 0 var(--spacing-md);
}

.content-block {
  margin-bottom: var(--spacing-xl);
}

.content-block h3 {
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.content-block p {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.content-images {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.content-images img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: 4px;
}

/* 搭配方案 */
.styling-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.styling-card {
  background-color: var(--color-bg-secondary);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.styling-card img {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.styling-content {
  padding: var(--spacing-md);
}

.styling-content h4 {
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
}

.styling-content p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.styling-tips {
  margin-top: var(--spacing-sm);
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--color-border);
}

.styling-tips strong {
  color: var(--color-accent-1);
  font-weight: 500;
}

/* 页脚 */
.footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-md) 0;
  text-align: center;
}

.footer p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 300;
}

/* 响应式设计 */
@media (max-width: 768px) {
  :root {
    --spacing-md: 1.5rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }

  .nav-container {
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
  }

  .nav-links {
    gap: var(--spacing-sm);
  }

  .nav-links a {
    font-size: 0.85rem;
    padding: var(--spacing-xs);
  }

  .hero-slider {
    height: 60vh;
  }

  .slide-text h2 {
    font-size: 1.8rem;
  }

  .slide-text p {
    font-size: 1rem;
  }

  .section-intro h2 {
    font-size: 1.5rem;
  }

  .section-intro p {
    font-size: 1rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .feature-card img {
    height: 400px;
  }

  .content-block h3 {
    font-size: 1.5rem;
  }

  .content-images {
    grid-template-columns: 1fr;
  }

  .content-images img {
    height: 350px;
  }

  .styling-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .styling-card img {
    height: 400px;
  }
}

@media (max-width: 480px) {
  .slide-text h2 {
    font-size: 1.5rem;
  }

  .slide-text p {
    font-size: 0.9rem;
  }

  .feature-card img {
    height: 300px;
  }

  .content-images img {
    height: 300px;
  }

  .styling-card img {
    height: 350px;
  }
}