/* 自定义字体导入 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;700&family=Noto+Sans+SC:wght@300;400;500&display=swap');

/* 全局变量 */
:root {
  --color-primary: #2c2c2c;
  --color-secondary: #666666;
  --color-accent: #a8917d;
  --color-background: #fafafa;
  --color-surface: #ffffff;
  --font-serif: 'Noto Serif SC', serif;
  --font-sans: 'Noto Sans SC', sans-serif;
}

/* 基础样式重置和优化 */
* {
  box-sizing: border-box;
}

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

/* 标题字体 */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 500;
}

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

.image-hover img {
  transition: transform 0.5s ease, filter 0.5s ease;
}

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

/* 文本链接样式 */
.link-underline {
  position: relative;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

/* 卡片悬浮效果 */
.card-hover {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

/* 加载动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

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

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

::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #999;
}

/* 图片懒加载占位符 */
.lazy-image {
  background-color: #f0f0f0;
  transition: background-color 0.3s ease;
}

.lazy-image.loaded {
  background-color: transparent;
}

/* 响应式文本大小 */
@media (max-width: 640px) {
  .text-responsive-sm {
    font-size: 0.875rem;
  }
}

@media (min-width: 641px) and (max-width: 1024px) {
  .text-responsive-md {
    font-size: 1rem;
  }
}

@media (min-width: 1025px) {
  .text-responsive-lg {
    font-size: 1.125rem;
  }
}

/* 导航栏活动状态 */
.nav-active {
  color: var(--color-accent);
  font-weight: 500;
}

/* 按钮悬停效果 */
.btn-primary {
  background-color: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  transition: all 0.3s ease;
  padding: 0.75rem 2rem;
  cursor: pointer;
}

.btn-primary:hover {
  background-color: var(--color-primary);
  color: var(--color-surface);
}

/* 图片遮罩效果 */
.image-overlay {
  position: relative;
}

.image-overlay::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.3) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

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

/* 标签样式 */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--color-background);
  border: 1px solid #e0e0e0;
  border-radius: 20px;
  font-size: 0.875rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.tag.active {
  background-color: var(--color-primary);
  color: var(--color-surface);
  border-color: var(--color-primary);
}