/* 全局样式重置与基础配置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-neutral-100: #fafaf9;
  --color-neutral-200: #f5f5f4;
  --color-neutral-300: #e7e5e4;
  --color-neutral-800: #292524;
  --color-neutral-900: #1c1917;
  --color-accent: #d4b5a0;
  --font-main: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: var(--font-main);
  background-color: var(--color-neutral-100);
  color: var(--color-neutral-900);
  line-height: 1.7;
  overflow-x: hidden;
}

/* 导航栏样式 */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 250, 249, 0.95);
  backdrop-filter: blur(10px);
  transition: var(--transition-smooth);
}

.nav-link {
  position: relative;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 1px;
  background: var(--color-neutral-900);
  transition: var(--transition-smooth);
  transform: translateX(-50%);
}

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

/* 轮播图样式 */
.hero-slider {
  position: relative;
  height: 100vh;
  overflow: hidden;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

.slide.active {
  opacity: 1;
}

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

/* 图片悬停效果 */
.image-hover {
  overflow: hidden;
  position: relative;
}

.image-hover img {
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

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

.image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
  opacity: 0;
  transition: var(--transition-smooth);
  display: flex;
  align-items: flex-end;
  padding: 2rem;
}

.image-hover:hover .image-overlay {
  opacity: 1;
}

/* 页面淡入动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

.fade-in-delay-1 {
  animation: fadeIn 0.8s ease-out 0.2s forwards;
  opacity: 0;
}

.fade-in-delay-2 {
  animation: fadeIn 0.8s ease-out 0.4s forwards;
  opacity: 0;
}

/* 按钮样式 */
.btn-elegant {
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.btn-elegant::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: var(--color-neutral-900);
  transition: width 0.6s, height 0.6s, top 0.6s, left 0.6s;
  transform: translate(-50%, -50%);
  z-index: -1;
}

.btn-elegant:hover::before {
  width: 300%;
  height: 300%;
}

/* 滚动视差效果 */
.parallax {
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}

/* 响应式网格 */
.grid-masonry {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

@media (min-width: 768px) {
  .grid-masonry {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-masonry {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 页脚样式 */
.footer {
  background: var(--color-neutral-900);
  color: var(--color-neutral-200);
  padding: 2rem 0;
  text-align: center;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}

/* 懒加载占位 */
.lazy-loading {
  background: linear-gradient(90deg, var(--color-neutral-200) 25%, var(--color-neutral-300) 50%, var(--color-neutral-200) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* 文字优雅样式 */
.text-elegant {
  font-weight: 300;
  letter-spacing: 0.05em;
  line-height: 1.8;
}

/* 卡片阴影 */
.card-shadow {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  transition: var(--transition-smooth);
}

.card-shadow:hover {
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-neutral-200);
}

::-webkit-scrollbar-thumb {
  background: var(--color-neutral-800);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-neutral-900);
}