/* 动态解析在手机上优先露出题目：站点导航保留为单行横向滑动。 */
@media (max-width: 639px) {
  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 {
    position: relative;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 > div {
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 a.group {
    min-width: 0;
    gap: 0.5rem;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 a.group > div:first-child {
    width: 2rem;
    height: 2rem;
    flex: none;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 a.group img {
    width: 1.5rem;
    height: 1.5rem;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 a.group .leading-tight {
    min-width: 0;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 a.group .leading-tight > div:first-child {
    overflow: hidden;
    font-size: 0.9375rem;
    line-height: 1.25rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 a.group .leading-tight > div:last-child {
    display: none;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 > div > div.flex.flex-wrap {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    padding-bottom: 0.125rem;
    scrollbar-width: none;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 > div > div.flex.flex-wrap::-webkit-scrollbar {
    display: none;
  }

  body:has(nav[aria-label="动态课件导航"]) header.sticky.top-0.z-40 > div > div.flex.flex-wrap > * {
    min-height: 2rem;
    flex: 0 0 auto;
    padding-top: 0.3rem;
    padding-bottom: 0.3rem;
  }

  body:has(nav[aria-label="动态课件导航"]) nav[aria-label="动态课件导航"] {
    flex-wrap: nowrap;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    font-size: 0.8125rem;
  }

  body:has(nav[aria-label="动态课件导航"]) nav[aria-label="动态课件导航"] a {
    min-height: 2rem;
    flex: 0 0 auto;
  }

  body:has(nav[aria-label="动态课件导航"]) nav[aria-label="动态课件导航"] > span {
    min-width: 0;
    flex: 1 1 auto;
  }
}

/* 上海中考单题动态解析：压缩总站导航与题目信息区，优先露出解析正文。 */
@media (max-width: 639px) {
  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 {
    position: relative;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 > div {
    gap: 0.375rem;
    padding: 0.5rem 0.75rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 a.group {
    min-width: 0;
    gap: 0.5rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 a.group > div:first-child {
    width: 2rem;
    height: 2rem;
    flex: none;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 a.group img {
    width: 1.5rem;
    height: 1.5rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 a.group .leading-tight {
    min-width: 0;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 a.group .leading-tight > div:first-child {
    overflow: hidden;
    font-size: 0.9375rem;
    line-height: 1.25rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 a.group .leading-tight > div:last-child {
    display: none;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 > div > div.flex.flex-wrap {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    padding-bottom: 0.125rem;
    scrollbar-width: none;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 > div > div.flex.flex-wrap::-webkit-scrollbar {
    display: none;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) header.sticky.top-0.z-40 > div > div.flex.flex-wrap > * {
    min-height: 2rem;
    flex: 0 0 auto;
    padding-top: 0.3rem;
    padding-bottom: 0.3rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b > div {
    padding: 0.375rem 0.75rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b > div > div:first-child {
    font-size: 0.75rem;
    line-height: 1.125rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b > div > div.mt-2 {
    display: block;
    margin-top: 0.125rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b .min-w-0 > div:first-child {
    overflow: hidden;
    font-size: 0.6875rem;
    line-height: 1rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b h1 {
    margin-top: 0.125rem;
    font-size: 1rem;
    line-height: 1.25rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b .min-w-0 > div.mt-1.text-xs.text-muted-foreground {
    display: none;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b .flex.flex-col.items-end {
    margin-top: 0.25rem;
    align-items: flex-start;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) section.border-b.border-border.bg-gradient-to-b button {
    min-height: 1.75rem;
    padding: 0.25rem 0.5rem;
    font-size: 0.6875rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) iframe[src^="/sh-math/index.html#/lesson/"] {
    border-radius: 0.5rem;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) iframe[src^="/sh-math/index.html#/lesson/"] > * {
    max-width: 100%;
  }

  body:has(iframe[src^="/sh-math/index.html#/lesson/"]) div.mx-auto.max-w-6xl.px-4.py-4:has(> iframe[src^="/sh-math/index.html#/lesson/"]) {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
  }
}