.learn-detail-page {
  background: var(--o-bg);
  font-family: var(--o-font-body);
  color: var(--o-ink);
  min-height: 100vh;
}
.learn-detail-page__inner {
  box-sizing: content-box;
  margin: 0 auto;
  padding: 36px 10px 48px;
  max-width: 1180px;
}
@media (min-width: 1300px) { .learn-detail-page__inner { max-width: 1280px; } }
@media (min-width: 1400px) { .learn-detail-page__inner { max-width: 1380px; } }

/* ---------- layout: main column + sidebar ---------- */
.learn-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}
@media (min-width: 992px) {
  .learn-detail-grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 32px;
  }
}

/* =====================================================================
   MAIN ARTICLE
   ===================================================================== */
.learn-article {
  background: var(--o-card);
  border: none;
  border-radius: var(--o-radius-sm);
  box-shadow: var(--o-shadow);
  padding: 20px;
}

/* hero image */
.learn-article__hero {
  display: block;
  width: calc(100% + 40px);
  margin: -20px -20px 20px;
  overflow: hidden;
  border-radius: var(--o-radius-sm) var(--o-radius-sm) 0 0;
  background: var(--o-line-soft);
}
.learn-article__hero img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 400 / 230;
}

/* article meta */
.learn-article__title {
  font: 700 22px/1.3 var(--o-font-display);
  color: var(--o-ink);
  margin: 0 0 12px;
}
.learn-article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--o-ink-3);
  margin-bottom: 18px;
}
.learn-article__meta a {
  color: var(--o-ink-3);
  text-decoration: none;
}
.learn-article__meta a:hover {
  color: var(--o-accent);
}

/* body content (server-rendered WYSIWYG) */
.learn-article__body {
  font-size: 15px;
  line-height: 1.75;
  color: var(--o-ink);
}
.learn-article__body p {
  margin: 0 0 16px;
}
.learn-article__body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--o-radius-sm);
  margin: 12px 0;
}
.learn-article__body h2 {
  font: 700 20px/1.3 var(--o-font-display);
  color: var(--o-ink);
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--o-accent);
}
.learn-article__body h3 {
  font: 600 17px/1.35 var(--o-font-display);
  color: var(--o-ink);
  margin: 22px 0 10px;
}
.learn-article__body h4 {
  font: 600 15px/1.4 var(--o-font-display);
  color: var(--o-ink);
  margin: 18px 0 8px;
}
.learn-article__body ul,
.learn-article__body ol {
  margin: 0 0 16px;
  padding-left: 22px;
}
.learn-article__body li {
  margin-bottom: 6px;
}
.learn-article__body a {
  color: var(--o-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.learn-article__body a:hover {
  color: var(--o-ink-2);
}
.learn-article__body blockquote {
  margin: 16px 0;
  padding: 12px 18px;
  border-left: 3px solid var(--o-accent);
  background: var(--o-bg);
  border-radius: 0 var(--o-radius-sm) var(--o-radius-sm) 0;
  color: var(--o-ink-2);
  font-style: italic;
}
.learn-article__body code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  background: var(--o-line-soft);
  padding: 2px 6px;
  border-radius: var(--o-radius-tag);
}
.learn-article__body pre {
  background: var(--o-line-soft);
  border-radius: var(--o-radius-sm);
  padding: 14px 16px;
  overflow-x: auto;
  margin: 14px 0;
  font-size: 13px;
  line-height: 1.6;
}
.learn-article__body pre code {
  background: transparent;
  padding: 0;
}
.learn-article__body table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 14px;
}
.learn-article__body th,
.learn-article__body td {
  border: 1px solid var(--o-line);
  padding: 10px;
  text-align: left;
}
.learn-article__body th {
  background: var(--o-bg);
  font-weight: 600;
}

/* tags + share footer */
.learn-article__footer {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--o-line);
}
.learn-article__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}
.learn-article__tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--o-ink-2);
  background: var(--o-line-soft);
  border-radius: var(--o-radius-tag);
  text-decoration: none;
  transition: background-color .2s ease, color .2s ease;
}
.learn-article__tag:hover {
  background: var(--o-accent);
  color: #fff;
}
.learn-article__share {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.learn-article__share-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--o-ink-3);
}
.learn-article__share a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--o-line-soft);
  color: var(--o-ink-2);
  text-decoration: none;
  transition: background-color .2s ease, color .2s ease;
}
.learn-article__share a:hover {
  background: var(--o-accent);
  color: #fff;
}
.learn-article__share a svg {
  width: 16px;
  height: 16px;
}

/* =====================================================================
   SIDEBAR (Featured Posts / Categories / Tags)
   ===================================================================== */
.learn-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

@media (min-width: 992px) {
  /* On desktop: show right sidebar; hide after-article sidebar */
  .learn-sidebar--after {
    display: none;
  }
  .learn-sidebar--right {
    display: flex;
  }
}

/* =====================================================================
   COMMENTS SECTION (original classes preserved for backward compat)
   ===================================================================== */
.learn-comments {
  margin-top: 28px;
  background: var(--o-card);
  border: none;
  border-radius: var(--o-radius-sm);
  box-shadow: var(--o-shadow);
  padding: 20px;
}
.comment-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.learn-comments__title {
  font: 700 20px var(--o-font-display);
  letter-spacing: -.01em;
  color: var(--o-ink);
  margin: 0;
}

/* comment form box */
.comment-form-box {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--o-line-soft);
  box-sizing: border-box;
}
.comment-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.comment-form.expanded {
  gap: 16px;
}
.comment-form .comment-input-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.comment-form .avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex: 0 0 auto;
}
.comment-form-textarea {
  flex-grow: 1;
  border: 1px solid var(--o-line);
  border-radius: var(--o-radius-sm);
  outline: none;
  padding: 8px 12px;
  font: 14px var(--o-font-body);
  color: var(--o-ink);
  background: var(--o-bg);
  resize: none;
  min-height: 44px;
  transition: border-color .15s ease, box-shadow .15s ease, background-color .15s ease;
}
.comment-form-textarea:focus {
  border-color: var(--o-accent);
  box-shadow: 0 0 0 3px var(--o-accent-soft);
  background: var(--o-card);
}
.comment-form.expanded .comment-form-textarea {
  min-height: 100px;
}
.comment-submit-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

/* loading */
.loading {
  text-align: center;
  padding: 20px 0;
  color: var(--o-ink-3);
}
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--o-line);
  border-top-color: var(--o-accent);
  border-radius: 50%;
  animation: cr-spin 0.7s linear infinite;
  margin: 0 auto 8px;
}

/* comment list */
.comments-list {
  display: flex;
  flex-direction: column;
}
.single-comment {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--o-line);
}
.single-comment:last-child {
  border-bottom: none;
}
.single-comment > .avatar {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}
.comment-body {
  flex: 1;
}
.commenter {
  font: 600 13px var(--o-font-body);
  color: var(--o-ink);
  margin-bottom: 2px;
}
.comment-content {
  font-size: 14px;
  line-height: 1.6;
  color: var(--o-ink-2);
  white-space: pre-wrap;
  padding: 8px 0px;
}
.comment-action {
  display: flex;
  align-items: center;
  gap: 16px;
}
.comment-action .date {
  font-size: 11px;
  color: var(--o-ink-3);
}
.like-btn,
.reply-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  font-size: 12px;
  color: var(--o-ink-3);
  cursor: pointer;
  padding: 0;
  transition: color .15s ease;
}
.like-btn:hover,
.reply-btn:hover {
  color: var(--o-accent);
}
.like-btn.liked {
  color: var(--o-danger);
}
.like-btn i,
.reply-btn i {
  font-size: 14px;
}

/* replies */
.replies {
  margin-top: 14px;
  padding-left: 14px;
  border-left: 2px solid var(--o-line);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.single-reply {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.reply-avatar .avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}
.reply-body {
  flex: 1;
}
.reply-head {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin-bottom: 10px;
}
.replier {
  font: 600 12px var(--o-font-body);
  color: var(--o-ink);
}
.reply-content {
  font-size: 13px;
  color: var(--o-ink-2);
  white-space: pre-wrap;
  padding: 0px 10px;
}
.reply-body .date {
  font-size: 11px;
  color: var(--o-ink-3);
}
.view-more-replies {
  margin-top: 8px;
}
.view-more-replies button {
  background: none;
  border: none;
  font-size: 12px;
  color: var(--o-ink-3);
  cursor: pointer;
  padding: 0;
}
.view-more-replies button:hover {
  color: var(--o-accent);
}

/* reply form */
.reply-form {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.reply-form textarea {
  min-height: 36px;
}
.reply-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}
.reply-actions button {
  border-radius: var(--o-radius-sm);
  padding: 8px 20px;
  font-weight: 600;
  font-size: 13px;
  background: var(--o-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(1, 103, 243, .22);
  transition: background-color .15s ease, transform .12s ease;
}
.reply-actions button:hover {
  background: var(--o-accent-hover);
}
.reply-actions button:active {
  transform: scale(.97);
}

/* no comments (empty state, aligned with §6.8) */
.no-comments {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px 20px;
  margin: 0;
  font: 700 18px var(--o-font-display);
  color: var(--o-ink);
}

/* submit button in comment form */
.comment-form .button {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.comment-btn {
  border-radius: var(--o-radius-sm);
  padding: 8px 20px;
  font-weight: 600;
  font-size: 13px;
  background: var(--o-accent);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(1, 103, 243, .22);
  transition: background-color .15s ease, transform .12s ease;
}
.comment-btn:hover {
  background: var(--o-accent-hover);
}
.comment-btn:active {
  transform: scale(.97);
}
.comment-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none;
  transform: none;
}
.muted-text {
  font-size: 12px;
  color: var(--o-ink-3);
}
.warning-text {
  color: var(--o-danger);
}

/* pagination */
.pagination {
  margin-top: 18px;
  display: flex;
  justify-content: center;
}
.pagination ul {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 8px;
}
.pagination li {
  display: flex;
  align-items: center;
}
.pagination a,
.pagination button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 10px;
  border-radius: var(--o-radius-sm);
  border: 1px solid var(--o-line);
  background: var(--o-card);
  color: var(--o-ink);
  font-family: inherit;
  font-size: 14px;
  text-decoration: none;
  cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background-color .15s ease;
}
.pagination a:hover,
.pagination button:hover {
  border-color: var(--o-accent);
  color: var(--o-accent);
}
.pagination li.active a,
.pagination li.active button {
  background: var(--o-accent);
  border-color: var(--o-accent);
  color: #fff;
  box-shadow: 0 4px 12px rgba(1, 103, 243, .25);
}

/* =====================================================================
   MOBILE (≤991px)
   ===================================================================== */
@media (max-width: 991px) {
  .learn-detail-page__inner {
    padding: 14px 14px calc(var(--o-bottomnav-h) + 20px);
  }

  /* On mobile: hide desktop right sidebar; show after-article sidebar */
  .learn-sidebar--right {
    display: none;
  }

  /* hide all sidebars on mobile */
  .learn-sidebar {
    display: none;
  }

  /* restore article card style on mobile */
  .learn-article {
    background: var(--o-card);
    border: none;
    border-radius: var(--o-radius-sm);
    box-shadow: var(--o-shadow);
    padding: 16px;
  }

  /* 移动端:文章正文裸 <table> 横向滚动,避免多列表格撑破窄屏布局(沿用 product-detail.css 同款方案) */
  .learn-article__body table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-collapse: separate;
    border-spacing: 0;
  }
  .learn-article__hero {
    width: calc(100% + 32px);
    margin: -16px -16px 14px;
    border-radius: var(--o-radius-sm) var(--o-radius-sm) 0  0;
  }
  .learn-article__title {
    font-size: 18px;
  }
  .learn-article__meta {
    margin-bottom: 14px;
  }
  .learn-article__body {
    font-size: 14px;
  }
  .learn-article__body h2 {
    font-size: 17px;
  }
  .learn-article__body h3 {
    font-size: 15px;
  }

  /* sidebar widgets get card style on mobile */
  .learn-widget {
    background: var(--o-card);
    border: none;
    border-radius: var(--o-radius-sm);
    box-shadow: var(--o-shadow);
    padding: 16px;
  }

  /* comments */
  .learn-comments {
    margin-top: 20px;
    padding: 16px;
  }
  .comment-form-box {
    margin-bottom: 14px;
    padding-bottom: 14px;
  }
  .comment-form .comment-input-row {
    gap: 8px;
  }
  .comment-form-textarea {
    font-size: 14px;
    padding: 10px 14px;
  }
  .single-comment {
    gap: 10px;
    margin-bottom: 14px;
    padding-bottom: 12px;
  }
  .single-comment > .avatar {
    flex: 0 0 32px;
    width: 32px;
    height: 32px;
  }
  .reply-form .comment-form-textarea {
    min-height: 44px;
    font-size: 14px;
  }
  .single-reply {
    gap: 6px;
  }
  .single-reply .avatar {
    flex: 0 0 22px;
    width: 22px;
    height: 22px;
  }
  .comment-action {
    gap: 12px;
  }
  .comment-action .date,.reply-body .date {
    font-size: 10px;
  }
  .like-btn,
  .reply-btn {
    font-size: 11px;
    padding: 4px 10px;
  }
  .reply-form textarea {
    min-height: 44px;
    font-size: 14px;
  }
  .reply-actions button {
    min-height: 40px;
    padding: 8px 16px;
    font-size: 14px;
  }
  .comment-form .btn-primary {
    min-height: 40px;
    padding: 8px 18px;
    font-size: 14px;
  }
  .view-more-replies button {
    font-size: 11px;
    padding: 4px 0;
  }
  .replies {
    padding-left: 10px;
    gap: 10px;
  }
  .comment-title {
    margin-bottom: 12px;
  }
  .comment-title h3 {
    font-size: 20px;
  }
  .comment-title .learn-comments__title {
    font-size: 20px;
  }
  .no-comments {
    font-size: 16px;
    padding: 48px 16px;
  }
  .loading {
    padding: 14px 0;
    font-size: 13px;
  }
  .loading .spinner {
    width: 20px;
    height: 20px;
  }
  .pagination {
    margin-top: 12px;
  }
  .pagination a,
  .pagination button {
    min-width: 40px;
    height: 40px;
    font-size: 14px;
  }

}


/* =====================================================================
   EDITORIAL TYPOGRAPHY POLISH
   ===================================================================== */
@media (min-width: 992px) {
  .learn-article {
    padding: 28px 32px;
  }
  .learn-article__hero {
    width: calc(100% + 64px);
    margin: -28px -32px 24px;
  }
  .learn-article__title {
    font-size: 26px;
  }
  .learn-article__body {
    font-size: 16px;
  }
  .learn-comments {
    margin-top: 36px;
    padding: 28px 32px;
  }
  .learn-comments__title {
    font-size: 20px;
    margin-bottom: 22px;
  }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .learn-article__tag,
  .learn-article__share a,
  .comment-form-textarea,
  .comment-btn,
  .reply-actions button,
  .like-btn,
  .reply-btn,
  .pagination a,
  .pagination button,
  .spinner {
    transition: none !important;
    animation: none !important;
  }
  .comment-btn:active,
  .reply-actions button:active {
    transform: none !important;
  }
}

/* =====================================================================
   Reusable spinner from product-list.css (inherited via master load)
   ===================================================================== */

/* ===== FAQ 区块（P1-3 Learn 文章详情页通用 FAQ；可见区块与 FAQPage schema 同源，文本须一致） ===== */
/* ===== FAQ accordion: native-app disclosure (iOS settings style) ===== */
.learn-faq{
  margin:32px 0 8px;
  padding:24px;
  background:var(--o-card,#fff);
  border-radius:var(--o-radius,16px);
  box-shadow:var(--o-shadow,0 1px 2px rgba(13,17,23,.04),0 8px 24px rgba(13,17,23,.06));
  overflow:hidden;
}
.learn-faq__title{
  margin:0 0 14px;
  font:700 18px/1.3 var(--o-font-display,-apple-system,BlinkMacSystemFont,'Manrope','Segoe UI',sans-serif);
  letter-spacing:-.01em;
  color:var(--o-ink,#0d1117);
}
.learn-faq__item{border-top:1px solid var(--o-line-soft,#eef0f2)}
.learn-faq__item:first-child{border-top:none}
.learn-faq__q{
  display:flex;
  align-items:center;
  gap:8px;
  min-height:var(--o-touch,44px);
  padding:12px 38px 12px 4px;
  position:relative;
  color:var(--o-ink,#0d1117);
  font:600 15px/1.45 var(--o-font-display,-apple-system,BlinkMacSystemFont,'Manrope','Segoe UI',sans-serif);
  cursor:pointer;
  list-style:none;
  border-radius:var(--o-radius-sm,11px);
  touch-action:manipulation;
  transition:background-color .15s ease,color .15s ease;
}
.learn-faq__q::-webkit-details-marker{display:none}
.learn-faq__q::marker{display:none}
.learn-faq__q::after{
  content:"";
  position:absolute;
  right:14px;
  top:50%;
  width:9px;
  height:9px;
  border-right:2px solid var(--o-ink-3,#8b949e);
  border-bottom:2px solid var(--o-ink-3,#8b949e);
  transform:translateY(-50%) rotate(45deg);
  transition:transform .25s cubic-bezier(.22,.61,.36,1),border-color .2s ease;
}
.learn-faq__item[open] .learn-faq__q::after{
  transform:translateY(-50%) rotate(-135deg);
  border-color:var(--o-accent,#0167F3);
}
.learn-faq__a{
  padding:2px 4px 16px;
  color:var(--o-ink-2,#57606a);
  font:400 14px/1.65 var(--o-font-body,'Manrope',sans-serif);
}
.learn-faq__item[open] .learn-faq__a{
  animation:learnFaqAnswerIn .28s cubic-bezier(.22,.61,.36,1) both;
}
@keyframes learnFaqAnswerIn{
  from{opacity:0;transform:translateY(-4px)}
  to{opacity:1;transform:none}
}
/* native-app entrance: rise as the card scrolls into view (graceful fallback) */
@supports (animation-timeline:view()){
  .learn-faq{
    animation:learnFaqRise .5s cubic-bezier(.22,.61,.36,1) both;
    animation-timeline:view();
    animation-range:entry 0% entry 45%;
  }
}
@keyframes learnFaqRise{
  from{opacity:0;transform:translateY(16px)}
  to{opacity:1;transform:none}
}
@media (max-width:991px){
  .learn-faq{
    margin:24px 0 8px;
    padding:18px 14px;
    border-radius:var(--o-radius-sm,11px);
    box-shadow:0 1px 3px rgba(13,17,23,.06);
  }
  .learn-faq__title{margin:0 0 10px;font-size:17px}
  .learn-faq__q{padding:14px 36px 14px 2px;font-size:15px;min-height:var(--o-touch,44px)}
  .learn-faq__a{padding:2px 2px 14px;font-size:14px}
}
@media (prefers-reduced-motion:reduce){
  .learn-faq,
  .learn-faq__q::after,
  .learn-faq__item[open] .learn-faq__a{
    transition:none;
    animation:none;
  }
  .learn-faq,
  .learn-faq__item[open] .learn-faq__a{opacity:1;transform:none}
}