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

/* 全局变量定义 */
:root {
  --color-bg-primary: #1a1a1a;
  --color-bg-secondary: #2d2d2d;
  --color-text-primary: #f0f0f0;
  --color-accent: #c0a062;
  --color-accent-secondary: #8a7f6d;
}

/* 基础重置与字体设置 */
html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: 'Helvetica Now', 'Avenir Next', 'Noto Sans SC', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-bg-secondary);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-secondary);
}

/* 动画工具类 */
.fade-in {
  animation: fadeIn 1.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  opacity: 0;
}

.slide-up {
  animation: slideUp 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  opacity: 0;
  transform: translateY(30px);
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-500 { animation-delay: 0.5s; }

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 图片交互效果 */
.img-hover-zoom {
  overflow: hidden;
  position: relative;
  display: block;
}

.img-hover-zoom img {
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.hover-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.img-hover-zoom:hover .hover-overlay {
  opacity: 1;
}

/* 隐藏滚动条但保留功能 */
.hide-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}
.hide-scrollbar::-webkit-scrollbar {
  display: none;
}

/* 辅助文本样式 */
.text-justify-custom {
  text-align: justify;
  text-justify: inter-ideograph;
}

/* 导航链接动效 */
.nav-link {
  position: relative;
  text-decoration: none;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 1px;
  bottom: -4px;
  left: 0;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

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