/* 布局层 - 页头、页脚、主区域栅格、侧边栏与广告位 */

/* 页头：毛玻璃质感 + 粘性定位 */
.site-header {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  font-family: "Fredoka", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--color-text);
}

.site-logo .logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, #fb923c, #f97316);
  color: #fff;
  font-size: 19px;
  box-shadow: 0 4px 10px rgba(249, 115, 22, 0.35);
}

/* 导航：胶囊悬停高亮 */
.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
  transition: all 0.18s ease;
}

.site-nav a:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  text-decoration: none;
}

/* 页头右侧：导航 + 语言切换器 */
.site-header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 语言切换器：胶囊按钮 */
.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: all 0.18s ease;
  white-space: nowrap;
}

.lang-switch:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  text-decoration: none;
}

/* 主区域栅格：左内容 + 右广告侧栏 */
.main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: start;
}

.layout-main {
  min-width: 0;
}

/* 侧边栏 */
.sidebar {
  position: sticky;
  top: 84px;
}

/* 侧边栏提示卡片（自动广告模式下，为侧栏提供内容载体） */
.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}

.sidebar-card h3 {
  font-size: 17px;
  margin-bottom: 14px;
}

.sidebar-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.sidebar-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* 广告位（预留：如需叠加手动广告单元可复用） */
.ad-slot {
  background: #fffaf4;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #c0a888;
  font-size: 13px;
  margin-bottom: 16px;
  overflow: hidden;
}

/* 侧边栏广告位：300px 宽栏适配标准 300x250 中矩形 */
.ad-slot--sidebar {
  min-height: 250px;
}

.ad-slot--bottom {
  min-height: 120px;
  max-width: var(--max-width);
  margin: 32px auto 0;
}

/* 页脚 */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 40px;
}

.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 28px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: flex-start;
  justify-content: space-between;
  color: var(--color-text-secondary);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.footer-links a {
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: var(--color-primary);
}

/* 响应式：窄屏时侧边栏移到内容下方 */
@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}

@media (max-width: 600px) {
  .site-nav {
    gap: 2px;
  }

  .site-nav a {
    padding: 8px 10px;
    font-size: 14px;
  }

  .site-header-inner {
    flex-wrap: wrap;
  }

  .site-header-right {
    flex-wrap: wrap;
    gap: 8px;
  }
}