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

:root {
  --color-primary: #FFFFFF;
  --color-secondary: #F8F9FA;
  --color-tertiary: #2C3E50;
  --color-accent: #F5F1E8;
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --font-serif: 'Playfair Display', 'Noto Serif SC', serif;
  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition-smooth: 300ms ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-primary);
  background-color: var(--color-primary);
  overflow-x: hidden;
}

/* 导航栏样式 */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 5%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  transition: var(--transition-smooth);
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-tertiary);
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  gap: 3rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  position: relative;
  transition: var(--transition-smooth);
  letter-spacing: 0.05em;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-tertiary);
  transition: var(--transition-smooth);
}

.nav-links a:hover {
  color: var(--color-tertiary);
}

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

/* 首页轮播样式 */
.hero-slider {
  position: relative;
  height: 100vh;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  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;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.3));
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: var(--color-primary);
}

.slide-title {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 400;
  margin-bottom: 2rem;
  letter-spacing: 0.15em;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.slide-caption {
  font-size: 1.2rem;
  max-width: 600px;
  text-align: center;
  line-height: 2;
  letter-spacing: 0.08em;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.intro-section {
  padding: 5rem 10%;
  text-align: center;
  background: var(--color-secondary);
}

.intro-text {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 2.2;
}

/* 设计哲学页面样式 */
.philosophy-container {
  padding: 8rem 5% 5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.philosophy-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-bottom: 6rem;
  align-items: center;
}

.philosophy-section:nth-child(even) {
  direction: rtl;
}

.philosophy-section:nth-child(even) > * {
  direction: ltr;
}

.philosophy-image {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.philosophy-image:hover {
  transform: scale(1.02);
}

.philosophy-content h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--color-tertiary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.08em;
}

.philosophy-content p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 2;
  margin-bottom: 1rem;
}

/* 视觉画廊样式 */
.gallery-container {
  padding: 8rem 5% 5rem;
}

.gallery-filter {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 3rem;
}

.filter-btn {
  background: none;
  border: 1px solid var(--color-text-secondary);
  padding: 0.8rem 2rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: var(--transition-smooth);
  letter-spacing: 0.05em;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-tertiary);
  color: var(--color-primary);
  border-color: var(--color-tertiary);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

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

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

.gallery-item:hover img {
  transform: scale(1.1);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: var(--color-primary);
  padding: 2rem;
  transform: translateY(100%);
  transition: transform var(--transition-smooth);
}

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

.gallery-overlay p {
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}

/* 全屏浏览模态框 */
.fullscreen-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.95);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}

.fullscreen-modal.active {
  display: flex;
}

.fullscreen-content {
  max-width: 90%;
  max-height: 90%;
}

.fullscreen-content img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.close-modal {
  position: absolute;
  top: 2rem;
  right: 2rem;
  color: var(--color-primary);
  font-size: 2.5rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.close-modal:hover {
  transform: rotate(90deg);
}

/* 页脚样式 */
footer {
  background: var(--color-secondary);
  padding: 3rem 5%;
  text-align: center;
}

.footer-content p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.1em;
}

/* 响应式设计 */
@media (max-width: 768px) {
  body {
    font-size: 14px;
  }

  .main-nav {
    padding: 1rem 5%;
  }

  .nav-logo {
    font-size: 1.2rem;
  }

  .nav-links {
    gap: 1.5rem;
  }

  .nav-links a {
    font-size: 0.85rem;
  }

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

  .slide-caption {
    font-size: 1rem;
    padding: 0 1rem;
  }

  .intro-section {
    padding: 3rem 5%;
  }

  .philosophy-container {
    padding: 6rem 5% 3rem;
  }

  .philosophy-section {
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 4rem;
  }

  .philosophy-section:nth-child(even) {
    direction: ltr;
  }

  .philosophy-image {
    height: 400px;
  }

  .philosophy-content h2 {
    font-size: 1.5rem;
  }

  .gallery-container {
    padding: 6rem 5% 3rem;
  }

  .gallery-filter {
    flex-wrap: wrap;
    gap: 1rem;
  }

  .filter-btn {
    padding: 0.6rem 1.5rem;
    font-size: 0.8rem;
  }

  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1rem;
  }

  .close-modal {
    top: 1rem;
    right: 1rem;
    font-size: 2rem;
  }
}