/* 全局样式重置与配置 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-white: #FFFFFF;
  --color-black: #000000;
  --color-dark-gray: #2C2C2C;
  --color-medium-gray: #333333;
  --color-light-gray: #F5F5F5;
  --color-gold: #C4B7A6;
  --font-sans: 'Helvetica Neue', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: var(--font-sans);
  color: var(--color-black);
  background-color: var(--color-white);
  line-height: 1.8;
  overflow-x: hidden;
}

/* 轮播图样式 */
.carousel {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

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

.carousel-item.active {
  opacity: 1;
}

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

/* 网格布局 */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  padding: 4rem 2rem;
}

/* 图片悬停效果 */
.image-hover {
  overflow: hidden;
  transition: var(--transition-smooth);
}

.image-hover img {
  transition: transform 0.6s ease;
}

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

/* 导航链接 */
.nav-link {
  position: relative;
  transition: var(--transition-smooth);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-black);
  transition: width 0.3s ease;
}

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

/* 响应式断点 */
@media (max-width: 768px) {
  .grid-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding: 2rem 1rem;
  }
  
  .carousel {
    height: 60vh;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }
}

/* 页面切换动画 */
.page-transition {
  animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 文字渐变效果 */
.text-gradient {
  background: linear-gradient(135deg, var(--color-black) 0%, var(--color-dark-gray) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 金属质感装饰 */
.gold-accent {
  color: var(--color-gold);
}

/* 滚动行为 */
html {
  scroll-behavior: smooth;
}

/* 选择文本样式 */
::selection {
  background-color: var(--color-dark-gray);
  color: var(--color-white);
}

/* 图片加载优化 */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 无障碍焦点样式 */
a:focus,
button:focus {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}