/* ==================== 全局样式与重置 ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary-white: #ffffff;
  --color-primary-gray: #f5f5f5;
  --color-primary-beige: #f8f6f3;
  --color-accent-terracotta: #d4a59a;
  --color-accent-blue: #9db4c8;
  --color-accent-moss: #a8b89f;
  --color-text-dark: #2c2c2c;
  --color-text-light: #666666;
  --color-text-footer: #999999;
  --spacing-xs: 20px;
  --spacing-sm: 40px;
  --spacing-md: 60px;
  --spacing-lg: 80px;
  --spacing-xl: 120px;
  --border-radius: 2px;
  --transition-speed: 500ms;
  --shadow-subtle: 0 2px 20px rgba(0, 0, 0, 0.05);
}

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

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

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

a {
  text-decoration: none;
  color: inherit;
  transition: opacity var(--transition-speed) ease;
}

a:hover {
  opacity: 0.7;
}

/* ==================== 导航栏 ==================== */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: var(--spacing-xs) var(--spacing-sm);
  transition: all var(--transition-speed) ease;
}

.nav-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-link {
  font-size: 15px;
  letter-spacing: 1px;
  padding: 8px 20px;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-speed) ease;
}

.nav-link:hover,
.nav-link.active {
  border-bottom-color: var(--color-accent-terracotta);
}

/* ==================== 轮播图 ==================== */
.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 var(--transition-speed) ease;
}

.slide.active {
  opacity: 1;
}

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

.slide-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  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;
  text-align: center;
  color: var(--color-primary-white);
  padding: var(--spacing-md);
}

.hero-title {
  font-size: 4rem;
  font-weight: 300;
  letter-spacing: 8px;
  margin-bottom: var(--spacing-xs);
  animation: fadeInUp 1s ease;
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 300;
  letter-spacing: 3px;
  animation: fadeInUp 1.2s ease;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-sm);
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 50px;
  border: 2px solid var(--color-primary-white);
  border-radius: 20px;
  opacity: 0.8;
  animation: scrollBounce 2s infinite;
}

.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 6px;
  height: 6px;
  background: var(--color-primary-white);
  border-radius: 50%;
  animation: scrollDot 2s infinite;
}

/* ==================== 内容区块 ==================== */
.content-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-sm);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: 4px;
  text-align: center;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-dark);
}

.section-text {
  font-size: 1.1rem;
  line-height: 2;
  color: var(--color-text-light);
  text-align: justify;
  max-width: 800px;
  margin: 0 auto var(--spacing-md);
}

/* ==================== 视觉画廊 ==================== */
.gallery-container {
  width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  padding: var(--spacing-sm) 0;
}

.gallery-wrapper {
  display: flex;
  gap: var(--spacing-xs);
  padding: 0 var(--spacing-sm);
}

.gallery-item {
  flex: 0 0 400px;
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  transition: transform var(--transition-speed) ease;
  cursor: pointer;
}

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

.gallery-item img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  transition: transform var(--transition-speed) ease;
}

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

.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: var(--color-primary-white);
  padding: var(--spacing-xs);
  font-size: 0.9rem;
  letter-spacing: 1px;
  text-align: center;
}

/* ==================== 设计哲学页面 ==================== */
.design-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  gap: 0;
}

.text-panel {
  position: sticky;
  top: 80px;
  height: calc(100vh - 80px);
  padding: var(--spacing-lg) var(--spacing-md);
  background-color: var(--color-primary-beige);
  overflow-y: auto;
}

.image-panel {
  padding: var(--spacing-lg) var(--spacing-md);
  background-color: var(--color-primary-gray);
}

.detail-section {
  margin-bottom: var(--spacing-lg);
}

.detail-title {
  font-size: 1.8rem;
  font-weight: 300;
  letter-spacing: 3px;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-dark);
}

.detail-text {
  font-size: 1rem;
  line-height: 2;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xs);
}

.detail-image {
  width: 100%;
  margin-bottom: var(--spacing-sm);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-subtle);
  cursor: pointer;
  transition: transform var(--transition-speed) ease;
}

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

/* ==================== 风格图鉴页面 ==================== */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) 0;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 25px;
  background: transparent;
  border: 1px solid var(--color-text-light);
  color: var(--color-text-light);
  font-size: 0.9rem;
  letter-spacing: 1px;
  cursor: pointer;
  border-radius: 20px;
  transition: all var(--transition-speed) ease;
}

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

.masonry-grid {
  column-count: 3;
  column-gap: var(--spacing-xs);
  padding: 0 var(--spacing-sm);
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: var(--spacing-xs);
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  cursor: pointer;
}

.masonry-item img {
  width: 100%;
  transition: transform var(--transition-speed) ease;
}

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

.masonry-tag {
  position: absolute;
  top: var(--spacing-xs);
  left: var(--spacing-xs);
  background: rgba(255, 255, 255, 0.9);
  padding: 5px 15px;
  font-size: 0.8rem;
  letter-spacing: 1px;
  border-radius: 15px;
  color: var(--color-text-dark);
}

/* ==================== 页脚 ==================== */
.footer {
  text-align: center;
  padding: var(--spacing-sm) 0;
  color: var(--color-text-footer);
  font-size: 12px;
  letter-spacing: 1px;
  background-color: var(--color-primary-beige);
}

/* ==================== 懒加载 ==================== */
img[data-src] {
  opacity: 0;
  transition: opacity var(--transition-speed) ease;
}

img.loaded {
  opacity: 1;
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollBounce {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(10px);
  }
}

@keyframes scrollDot {
  0%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(15px);
  }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
  .design-layout {
    grid-template-columns: 1fr;
  }
  
  .text-panel {
    position: static;
    height: auto;
  }
  
  .masonry-grid {
    column-count: 2;
  }
  
  .hero-title {
    font-size: 3rem;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-sm: 20px;
    --spacing-md: 40px;
    --spacing-lg: 60px;
  }
  
  .nav-wrapper {
    gap: var(--spacing-xs);
  }
  
  .nav-link {
    font-size: 13px;
    padding: 6px 12px;
  }
  
  .hero-title {
    font-size: 2rem;
    letter-spacing: 4px;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .section-text {
    font-size: 1rem;
  }
  
  .gallery-item {
    flex: 0 0 300px;
  }
  
  .masonry-grid {
    column-count: 1;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }
  
  .section-title {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }
  
  .gallery-item {
    flex: 0 0 250px;
  }
  
  .gallery-item img {
    height: 350px;
  }
}