/* 全局样式定义 */
:root {
  --color-primary: #111111;
  --color-secondary: #666666;
  --color-accent: #f4f4f4;
  --color-background: #ffffff;
  --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

body {
  font-family: var(--font-primary);
  color: var(--color-primary);
  background-color: var(--color-background);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

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

/* 图片悬停效果 */
.image-hover {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.image-hover:hover {
  transform: scale(1.02);
  opacity: 0.95;
}

/* 留白容器 */
.container-spacing {
  padding: 4rem 2rem;
}

/* 文字排版 */
.text-display {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 300;
  letter-spacing: 0.05em;
}

.text-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 400;
  color: var(--color-secondary);
}

/* 导航样式 */
.nav-link {
  position: relative;
  transition: color 0.3s ease;
}

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

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

/* 页脚样式 */
.footer {
  border-top: 1px solid var(--color-accent);
  padding: 2rem;
  text-align: center;
  color: var(--color-secondary);
  font-size: 0.875rem;
  letter-spacing: 0.05em;
}