/* 短视频节目详情：桌面并排选择，窄屏按观看、判断、准备顺序阅读。 */
.program-detail {
  max-width: none;
  width: 100%;
}
.program-detail .page-intro {
  margin-bottom: 24px;
}
.program-overview {
  display: grid;
  gap: 36px;
}
.program-watch {
  min-width: 0;
}
.program-detail * {
  min-width: 0;
}
.program-detail .external-video {
  margin: 0;
  border: 0;
  border-radius: 0;
}
.program-detail .external-video-slot {
  border-radius: 10px;
  overflow: hidden;
}
.program-detail .external-video figcaption {
  padding: 10px 0 0;
}
.program-detail .external-video-source {
  margin: 0;
}
.program-choice {
  padding: 24px 28px;
  background: var(--soft);
  border-radius: 10px;
}
.program-kind {
  display: flex;
  gap: 10px;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 22px;
}
.program-kind span:first-child {
  color: var(--accent);
}
.program-kind span + span {
  border-left: 1px solid var(--line);
  padding-left: 10px;
}
.program-detail h2 {
  font-size: 22px;
  line-height: 1.45;
  margin: 0 0 14px;
}
.program-choice h3 {
  font-size: 15px;
  margin: 24px 0 8px;
}
.program-choice p {
  font-size: 15px;
  line-height: 1.85;
  margin: 0;
  color: var(--muted);
}
.program-choice #why p {
  color: var(--ink);
}
.program-prepare-link {
  display: inline-flex;
  gap: 20px;
  font-size: 14px;
  margin-top: 22px;
  text-decoration: none;
}
.program-preparation {
  display: grid;
  gap: 24px;
  margin-top: 40px;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.program-section-label > p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}
.program-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.program-steps li {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 18px;
}
.program-steps li > span {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}
.program-steps p {
  margin: 0;
  line-height: 1.8;
  font-size: 15px;
}
.program-resource-links:not(:empty) {
  border-top: 1px solid var(--line);
  padding-top: 20px;
  margin-top: 24px;
}
.program-resource-links h3 {
  margin: 0 0 12px;
  font-size: 16px;
}
.program-resource-links p {
  font-size: 13px;
  color: var(--muted);
  margin: 6px 0 12px;
}
.program-resource-links a {
  font-size: 14px;
  text-decoration: none;
}
.program-support {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 22px;
  font-size: 13px;
}
.program-support span {
  color: var(--muted);
}
.program-support a {
  color: var(--muted);
  text-decoration: none;
}
.program-detail a:hover {
  color: var(--accent);
  text-decoration: underline;
}
.program-alternatives {
  border-top: 1px solid var(--line);
  padding-top: 32px;
  margin-top: 4px;
}
.program-section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 18px;
}
.program-section-heading h2 {
  margin: 0;
}
.program-section-heading > a {
  font-size: 14px;
  text-decoration: none;
}
.program-alternative-grid {
  display: grid;
  gap: 24px;
}
.program-alternative {
  display: block;
  color: var(--ink);
  text-decoration: none;
  min-width: 0;
}
.program-alternative-cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 8px;
}
.program-alternative > div:last-child {
  padding-top: 14px;
}
.program-alternative-reason {
  font-size: 12px;
  color: var(--muted);
}
.program-alternative h3 {
  font-size: 18px;
  line-height: 1.5;
  margin: 5px 0 0;
}
.program-detail .source-note {
  margin-top: 32px;
}
.program-detail [id] {
  scroll-margin-top: 12px;
}
/* 锚点聚焦时标记标题，避免给整段长内容画出巨大焦点框。 */
.program-detail section[tabindex='-1']:focus-visible {
  outline: none;
}
.program-detail section[tabindex='-1']:focus-visible > h2,
.program-detail section[tabindex='-1']:focus-visible > .program-section-label > h2 {
  outline: 2px solid var(--brand-focus);
  outline-offset: 4px;
}
.program-choice-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0 24px;
}
.program-extensions {
  border-top: 1px solid var(--line);
  padding: 32px 0;
}
.program-extension > h3 {
  font-size: 16px;
  margin: 20px 0 10px;
}
.program-extension {
  margin-bottom: 24px;
}
.program-extension-body {
  font-size: 15px;
  line-height: 1.8;
}
.program-extension-body > p {
  margin: 8px 0 16px;
  color: var(--muted);
}
.program-extension-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}
.program-extension-links > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0 12px;
}
.program-extension-links a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
}
.program-extension-links > div > span {
  color: var(--muted);
  font-size: 13px;
}
.program-extension-fold {
  border-top: 1px solid var(--line);
}
.program-extension-item:last-child {
  border-bottom: 1px solid var(--line);
}
.program-extension-fold summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.program-extension-fold summary::-webkit-details-marker {
  display: none;
}
.program-extension-fold summary > span {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
  flex-shrink: 0;
}
.program-extension-fold[open] summary {
  color: var(--accent);
}
.program-extension-fold .program-extension-body {
  padding-bottom: 18px;
}
.program-extension-body ol {
  padding-left: 22px;
  margin: 0;
}
.program-extension-body li + li {
  margin-top: 12px;
}
.program-extension-body .program-extension-note {
  font-size: 13px;
}
.program-extension-body .copy-box {
  margin: 0;
}
.program-extension-body pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.program-detail a:focus-visible,
.program-detail summary:focus-visible,
.program-detail button:focus-visible {
  outline: 2px solid var(--brand-focus);
  outline-offset: 3px;
}
@media (min-width: 601px) and (max-width: 999px) {
  .program-choice {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 28px;
  }
  .program-kind,
  .program-choice-actions {
    grid-column: 1 / -1;
  }
  .program-choice h3 {
    margin-top: 0;
  }
  .program-alternative-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .program-alternative h3 {
    font-size: 16px;
  }
}
@media (max-width: 600px) {
  .program-detail .page-intro {
    margin-bottom: 20px;
  }
  .program-overview {
    gap: 22px;
  }
  .program-detail .external-video-slot {
    border-radius: 8px;
  }
  .program-detail .external-video-play-icon {
    width: 48px;
    height: 48px;
  }
  .program-detail .external-video-play-label {
    font-size: 12px;
    padding: 2px 8px;
  }
  .program-detail .external-video-source {
    gap: 0 12px;
    font-size: 12px;
  }
  .program-detail .external-video-source a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }
  .program-detail .external-video-feedback {
    top: 6px;
    left: 6px;
    right: 6px;
    padding: 6px 10px;
    font-size: 12px;
    gap: 0 10px;
  }
  .program-detail .external-video-feedback button {
    min-height: 44px;
  }
  .program-choice {
    padding: 20px;
  }
  .program-kind {
    margin-bottom: 14px;
  }
  .program-detail h2 {
    font-size: 20px;
    margin-bottom: 10px;
  }
  .program-choice h3 {
    margin: 18px 0 6px;
  }
  .program-choice p {
    font-size: 14px;
    line-height: 1.8;
  }
  .program-prepare-link {
    margin-top: 12px;
    min-height: 44px;
    align-items: center;
    gap: 8px;
  }
  .program-preparation {
    margin-top: 28px;
    padding: 24px 0;
    gap: 18px;
  }
  .program-section-label > p {
    font-size: 13px;
  }
  .program-steps li {
    gap: 12px;
    margin-bottom: 16px;
  }
  .program-steps li > span {
    flex: 0 0 20px;
  }
  .program-steps p {
    font-size: 14px;
  }
  .program-support {
    gap: 0 20px;
    margin-top: 16px;
  }
  .program-support span {
    flex-basis: 100%;
  }
  .program-support a,
  .program-resource-links a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
  }
  .program-alternatives,
  .program-extensions {
    padding-top: 24px;
  }
  .program-section-heading {
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
  }
  .program-section-heading h2 {
    margin: 0;
  }
  .program-section-heading > a {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    font-size: 13px;
  }
  .program-alternative-grid {
    gap: 0;
  }
  .program-alternative {
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 14px;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }
  .program-alternative > div:last-child {
    padding: 0;
  }
  .program-alternative h3 {
    font-size: 15px;
    margin-top: 4px;
  }
  .program-alternative-reason {
    font-size: 11px;
  }
  .program-extension-links a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    min-height: 44px;
  }
  .program-extension-body {
    font-size: 14px;
  }
  .program-extension-fold summary {
    font-size: 15px;
  }
  .program-extension-body .copy-heading {
    align-items: flex-start;
    gap: 12px;
    flex-wrap: wrap;
  }
  .program-extension-body .copy-heading h3 {
    font-size: 15px;
  }
  .program-extension-body button {
    min-height: 44px;
  }
  .program-detail .source-note {
    margin-top: 24px;
    overflow-wrap: anywhere;
  }
  .program-detail .source-note summary {
    min-height: 44px;
    padding-block: 10px;
  }
}
@media (max-width: 359px) {
  .program-choice {
    padding: 16px;
  }
  .program-alternative {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 12px;
  }
}
@media (min-width: 1000px) {
  .program-overview {
    grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr);
    align-items: start;
  }
  .program-preparation {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 48px;
  }
  .program-alternative-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}