.ai-article-page { padding-top: 32px; padding-bottom: 64px; }
.ai-reader { max-width: 1180px; margin: 0 auto; color: var(--text); }
.ai-reader-header, .ai-reader-guide, .ai-reader-empty { max-width: 860px; margin: 0 auto; }
.ai-reader-back { display: flex; align-items: center; justify-content: center; width: 32px; height: 32px; margin: 0 0 20px; border-radius: 6px; color: var(--text); }
.ai-reader-back:hover { background: var(--control-bg); }
.ai-reader-back:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.ai-reader-header h1 { margin: 0 0 16px; font-size: clamp(25px, 3.3vw, 38px); line-height: 1.4; font-weight: 600; overflow-wrap: anywhere; }
.ai-reader-original-title { margin: 0 0 20px; font-size: 17px; line-height: 1.6; color: var(--muted); }
.ai-reader-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 20px; font-size: 12px; color: var(--muted); }
.ai-reader-meta a, .ai-reader-end a { color: var(--link-fg); }
.ai-reader-guide { padding: 16px 20px; margin-top: 28px; margin-bottom: 28px; border-left: 3px solid var(--border); background: var(--panel-bg); border-radius: 0 6px 6px 0; }
.ai-reader-guide summary { cursor: pointer; font-size: 13px; color: var(--label-fg); }
.ai-reader-guide p { margin: 12px 0 0; font-size: 14px; line-height: 1.8; }
.ai-reader-guide .ai-reader-value { color: var(--muted); }
.ai-reader-toolbar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; padding: 14px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin: 32px 0 24px; }
.ai-reader-views { display: inline-flex; padding: 3px; background: var(--control-bg); border: 1px solid var(--border); border-radius: 7px; }
.ai-reader-views a { padding: 7px 14px; border-radius: 4px; color: var(--text); text-decoration: none; font-size: 13px; white-space: nowrap; }
.ai-reader-views a[aria-current] { background: var(--selected-bg); }
.ai-reader-progress { font-size: 12px; color: var(--muted); }
.ai-reader-notice { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 13px; line-height: 1.7; color: var(--muted); margin: 0 0 24px; }
.ai-reader-notice form { margin: 0; }
.ai-reader-layout { display: flex; align-items: flex-start; gap: 32px; }
.ai-reader-toc { flex: 0 0 184px; align-self: flex-start; position: sticky; top: calc(var(--header-h) + 16px); max-height: calc(100dvh - var(--header-h) - 32px); border-left: 1px solid var(--border); }
.ai-reader-toc p { margin: 0 0 10px; padding-left: 12px; color: var(--label-fg); font-size: 12px; }
.ai-reader-toc-links { max-height: calc(100dvh - var(--header-h) - 60px); overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
.ai-reader-toc a, .ai-reader-toc-mobile a { display: block; padding: 7px 10px; color: var(--muted); font-size: 12px; line-height: 1.6; overflow-wrap: anywhere; text-decoration: none; }
.ai-reader-toc a { border-left: 2px solid transparent; }
.ai-reader-toc a:hover, .ai-reader-toc-mobile a:hover { color: var(--text); }
.ai-reader-toc a[aria-current="location"], .ai-reader-toc-mobile a[aria-current="location"] { color: var(--text); font-weight: 600; }
.ai-reader-toc a[aria-current="location"] { border-left-color: var(--text); }
.ai-reader-toc-mobile { display: none; }
.ai-reader-body { flex: 1; min-width: 0; max-width: 760px; margin: 0 auto; }
.ai-reader-body.ai-reader-bilingual { max-width: none; }
.ai-reader-block { scroll-margin-top: calc(var(--header-h) + 24px); margin: 0 0 18px; min-width: 0; }
.ai-reader-prose { min-width: 0; font-size: 16px; line-height: 1.95; overflow-wrap: anywhere; }
.ai-reader-prose :is(p, ul, ol, blockquote, table, pre, figure) { margin: 0; }
.ai-reader-prose :is(h1, h2, h3, h4, h5, h6) { margin: 24px 0 4px; font-weight: 600; line-height: 1.6; }
.ai-reader-prose h2 { font-size: 23px; }
.ai-reader-prose h3 { font-size: 19px; }
.ai-reader-prose a { color: var(--link-fg); text-decoration: underline; text-underline-offset: 3px; }
.ai-reader-prose :is(ul, ol) { padding-left: 24px; }
.ai-reader-prose li + li { margin-top: 6px; }
.ai-reader-prose blockquote { padding-left: 18px; border-left: 2px solid var(--border); color: var(--muted); }
.ai-reader-prose pre { padding: 18px; overflow-x: auto; border-radius: 6px; background: var(--code-bg); font-size: 13px; line-height: 1.7; white-space: pre; }
.ai-reader-prose code { font-size: .88em; }
.ai-reader-prose img { display: block; max-width: 100%; height: auto; margin: 0 auto; border-radius: 4px; }
.ai-reader-prose figure { margin: 12px 0; }
.ai-reader-prose figcaption { margin-top: 8px; font-size: 12px; color: var(--muted); }
.ai-reader-prose table { display: block; max-width: 100%; overflow-x: auto; border-collapse: collapse; font-size: 13px; }
.ai-reader-prose :is(th, td) { padding: 8px 12px; border: 1px solid var(--border); text-align: left; min-width: 70px; }
.ai-reader-columns, .ai-reader-bilingual .ai-reader-block:not(.ai-reader-shared) { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
.ai-reader-media .ai-reader-prose { max-width: 680px; margin: 0 auto; }
.ai-reader-columns { font-size: 12px; color: var(--label-fg); margin-bottom: 18px; }
.ai-reader-source { color: var(--muted); font-size: 15px; line-height: 1.85; }
.ai-reader-bilingual .ai-reader-source { border-left: 1px solid var(--border); padding-left: 24px; }
.ai-reader-untranslated { font-size: 13px; color: var(--muted); }
.ai-reader-end { display: flex; flex-wrap: wrap; gap: 20px; padding-top: 28px; margin-top: 32px; border-top: 1px solid var(--border); font-size: 12px; }
.ai-reader-empty { padding: 28px 0; margin-top: 28px; border-top: 1px solid var(--border); }
.ai-reader-empty h2 { font-size: 19px; margin: 0 0 20px; }
.ai-reader-excerpt-label, .ai-reader-help { color: var(--muted); font-size: 13px; line-height: 1.7; }
.ai-reader-excerpt { font-size: 15px; line-height: 1.9; white-space: pre-wrap; overflow-wrap: anywhere; }
.ai-reader a:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 4px; }
@media (max-width: 1100px) {
  .ai-reader-layout { display: block; }
  .ai-reader-toc { display: none; }
  .ai-reader-toc-mobile { display: block; max-width: 760px; margin: 0 auto 24px; padding: 10px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
  .ai-reader-layout:has(.ai-reader-bilingual) .ai-reader-toc-mobile { max-width: none; }
  .ai-reader-toc-mobile summary { cursor: pointer; color: var(--text); font-size: 13px; font-weight: 600; }
  .ai-reader-toc-mobile summary span { margin-left: 6px; color: var(--muted); font-size: 12px; font-weight: 400; }
  .ai-reader-toc-mobile nav { max-height: 45dvh; margin-top: 8px; overflow-y: auto; }
  .ai-reader-toc-mobile a { padding: 8px 12px; border-left: 2px solid transparent; }
  .ai-reader-toc-mobile a[aria-current="location"] { border-left-color: var(--text); }
}
@media (max-width: 700px) {
  .ai-article-page { padding-top: 20px; }
  .ai-reader-back { margin-bottom: 16px; }
  .ai-reader-meta { gap: 8px 14px; }
  .ai-reader-guide { padding: 14px 16px; }
  .ai-reader-columns { display: none; }
  .ai-reader-bilingual .ai-reader-block:not(.ai-reader-shared) { display: block; padding-bottom: 20px; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
  .ai-reader-bilingual .ai-reader-source { border-left: 2px solid var(--border); padding-left: 14px; margin-top: 12px; font-size: 14px; }
  .ai-reader-views a { padding: 7px 12px; }
  .ai-reader-prose { font-size: 15px; }
}
@media (max-width: 640px) {
  .ai-reader-back { margin-left: -6px; }
}