.page-news {
  --news-tabw: 148px;
  --news-tick: 34%;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  padding: clamp(24px, 4.6vw, 52px) 0 clamp(22px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
}

.page-news .news-hero h1 {
  margin: 14px 0 16px;
  max-width: 15em;
  font-size: clamp(1.95rem, 4.6vw, 3.35rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--cream);
}

.page-news .news-hero .lede {
  max-width: 62ch;
  color: var(--silver);
}

.page-news .news-hero__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-news .news-hero__metrics li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px 16px;
  background: var(--panel);
}

.page-news .news-metric__num {
  font-size: clamp(1.5rem, 3.2vw, 2rem);
  font-weight: 500;
  line-height: 1;
  color: var(--cyan);
}

.page-news .news-plus {
  font-size: 0.72em;
  color: var(--orange);
}

.page-news .news-metric__label {
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--mid);
}

@media (min-width: 720px) {
  .page-news .news-hero__metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 主壳：左侧栏目栏 + 右侧内容流 ---------- */
.page-news .news-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding-top: 30px;
}

.page-news .news-body {
  min-width: 0;
}

.page-news .news-section {
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

.page-news .news-tabs {
  position: sticky;
  top: calc(var(--topbar-h) + 10px);
  z-index: 3;
  align-self: start;
  padding-bottom: 4px;
  background: var(--ink);
}

.page-news .news-tabs__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-news .news-tabs__list::-webkit-scrollbar {
  display: none;
}

.page-news .news-tab {
  display: block;
  padding: 7px 12px;
  font-size: 0.79rem;
  white-space: nowrap;
  text-decoration: none;
  color: var(--mid);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-news .news-tab:hover {
  color: var(--cream);
  border-color: var(--mid);
}

.page-news .news-tab.is-active {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(31, 224, 207, 0.08);
}

@media (min-width: 960px) {
  .page-news .news-shell {
    grid-template-columns: var(--news-tabw) minmax(0, 1fr);
    gap: 42px;
    padding-top: 38px;
  }

  .page-news .news-tabs__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
    border-left: 1px solid var(--line);
  }

  .page-news .news-tab {
    padding: 9px 0 9px 14px;
    margin-left: -1px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
  }

  .page-news .news-tab:hover {
    border-color: var(--mid);
    background: transparent;
  }

  .page-news .news-tab.is-active {
    border-color: var(--cyan);
    background: transparent;
  }
}

/* ---------- 图注与图像 ---------- */
.page-news .news-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-news .news-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-news .news-figure .media-cap {
  padding: 10px 12px;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--mid);
  border-top: 1px solid var(--line);
}

.page-news .news-figure--digest {
  aspect-ratio: 16 / 9;
}

.page-news .news-figure--topics {
  aspect-ratio: 3 / 2;
}

.page-news .news-figure--versions {
  margin-top: 26px;
  aspect-ratio: 12 / 7;
}

.page-news .news-figure--rhythm {
  margin-top: 18px;
}

/* ---------- 本期摘要 ---------- */
.page-news .digest-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

@media (min-width: 900px) {
  .page-news .digest-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }
}

.page-news .digest-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .digest-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 0 15px 10px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid transparent;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-news .digest-item:first-child {
  border-top: 1px solid var(--line);
}

.page-news .digest-item:hover,
.page-news .digest-item:focus-within {
  border-left-color: var(--cyan);
  background: rgba(31, 224, 207, 0.035);
}

.page-news .digest-item__no {
  padding-top: 3px;
  font-size: 0.78rem;
  color: var(--orange);
}

.page-news .digest-item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.68;
  color: var(--silver);
}

/* ---------- 按专题浏览 ---------- */
.page-news .topic-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

@media (min-width: 1000px) {
  .page-news .topic-layout {
    grid-template-columns: minmax(0, 1fr) 288px;
    gap: 32px;
    align-items: start;
  }
}

.page-news .topic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

@media (min-width: 620px) {
  .page-news .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-news .topic-card {
  position: relative;
  padding: 16px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

.page-news .topic-card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-news .topic-card .tag {
  color: var(--mid);
  font-size: 0.7rem;
}

.page-news .topic-card__name {
  margin: 9px 0 4px;
  font-size: 1.04rem;
  font-weight: 500;
  line-height: 1.35;
  color: var(--cream);
}

.page-news .topic-card__count {
  margin: 0;
  font-size: 0.75rem;
  color: var(--mid);
}

.page-news .topic-card__latest {
  margin: 12px 0 0;
  padding-top: 10px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--silver);
  border-top: 1px dashed var(--line);
  transition: color 180ms var(--ease);
}

.page-news .topic-card:hover .topic-card__latest {
  color: var(--cyan);
}

@media (min-width: 620px) {
  .page-news .topic-card--wide {
    grid-column: 1 / -1;
  }
}

/* ---------- 版本迭代记录 ---------- */
.page-news .version-list {
  display: grid;
  gap: 8px;
}

.page-news .version-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 180ms var(--ease);
}

.page-news .version-item[open] {
  border-color: rgba(31, 224, 207, 0.38);
}

.page-news .version-summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  list-style: none;
  cursor: pointer;
}

.page-news .version-summary::-webkit-details-marker {
  display: none;
}

.page-news .version-summary::after {
  content: "▾";
  font-size: 0.68rem;
  color: var(--mid);
  transition: transform 160ms var(--ease), color 160ms var(--ease);
}

.page-news .version-item[open] .version-summary::after {
  transform: rotate(180deg);
  color: var(--cyan);
}

.page-news .version-no {
  font-size: 1.72rem;
  font-weight: 500;
  line-height: 1;
  color: var(--orange);
}

.page-news .version-name {
  font-size: 0.97rem;
  font-weight: 500;
  color: var(--cream);
}

.page-news .version-when {
  font-size: 0.73rem;
  white-space: nowrap;
  color: var(--mid);
}

.page-news .version-changes {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 14px 18px 18px;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-news .version-changes li {
  position: relative;
  padding-left: 16px;
  font-size: 0.88rem;
  line-height: 1.62;
  color: var(--silver);
}

.page-news .version-changes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

@media (max-width: 540px) {
  .page-news .version-summary {
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px;
  }

  .page-news .version-when {
    display: none;
  }

  .page-news .version-no {
    font-size: 1.4rem;
  }
}

/* ---------- 指引更新 ---------- */
.page-news .row-body {
  min-width: 0;
}

.page-news .news-more {
  margin: 22px 0 0;
}

/* ---------- 条目调整公告 ---------- */
.page-news .changelog-panel {
  padding: clamp(20px, 3vw, 30px);
}

.page-news .changelog-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .changelog-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(11, 13, 15, 0.14);
}

.page-news .changelog-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-news .changelog-kind {
  display: inline-block;
  padding: 3px 0;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-align: center;
  color: var(--ink);
  background: var(--orange);
  border-radius: var(--radius);
}

.page-news .changelog-item:nth-child(2) .changelog-kind {
  background: var(--cyan);
}

.page-news .changelog-item:nth-child(3) .changelog-kind {
  color: var(--cream);
  background: var(--ink);
}

.page-news .changelog-item:nth-child(4) .changelog-kind {
  background: var(--silver);
}

.page-news .changelog-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.68;
}

.page-news .changelog-note {
  margin: 22px 0 0;
  padding-top: 16px;
  font-size: 0.85rem;
  line-height: 1.7;
  border-top: 1px dashed rgba(11, 13, 15, 0.22);
}

/* ---------- 更新节奏与反馈 ---------- */
.page-news .rhythm-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

@media (min-width: 880px) {
  .page-news .rhythm-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 38px;
    align-items: start;
  }
}

.page-news .rhythm-track {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  align-items: end;
  gap: 5px;
  height: 118px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-news .rhythm-tick {
  display: block;
  height: var(--news-tick);
  border-radius: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(31, 224, 207, 0.12));
  opacity: 0.85;
  transition: opacity 180ms var(--ease);
}

.page-news .rhythm-tick:hover {
  opacity: 1;
}

.page-news .rhythm-tick:nth-child(1) { height: 30%; }
.page-news .rhythm-tick:nth-child(2) { height: 44%; }
.page-news .rhythm-tick:nth-child(3) { height: 36%; }
.page-news .rhythm-tick:nth-child(4) { height: 58%; }
.page-news .rhythm-tick:nth-child(5) { height: 50%; }
.page-news .rhythm-tick:nth-child(6) { height: 66%; }
.page-news .rhythm-tick:nth-child(7) { height: 54%; }
.page-news .rhythm-tick:nth-child(8) { height: 74%; }
.page-news .rhythm-tick:nth-child(9) { height: 62%; }
.page-news .rhythm-tick:nth-child(10) { height: 84%; }
.page-news .rhythm-tick:nth-child(11) { height: 70%; }
.page-news .rhythm-tick:nth-child(12) { height: 92%; }

.page-news .rhythm-caption {
  margin: 10px 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--mid);
}

.page-news .rhythm-facts {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-news .rhythm-fact {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-news .rhythm-fact__k {
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-news .rhythm-fact p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.62;
  color: var(--silver);
}

.page-news .feedback-panel {
  margin-top: 30px;
  padding: clamp(20px, 3vw, 30px);
}

.page-news .feedback-note {
  max-width: 62ch;
  margin: 12px 0 18px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-news .feedback-note--sub {
  margin: 18px 0 0;
  font-size: 0.82rem;
  color: var(--mid);
}

.page-news .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-news .copy-value {
  padding: 8px 12px;
  font-size: 0.82rem;
  color: var(--cream);
  background: rgba(31, 224, 207, 0.07);
  border: 1px dashed rgba(31, 224, 207, 0.5);
  border-radius: var(--radius);
  overflow-wrap: anywhere;
}

.page-news .copy-btn[data-copied] {
  background: var(--green);
  color: var(--ink);
}

.page-news .panel--cream a {
  color: var(--ink);
  text-decoration: underline;
}

@media (prefers-reduced-motion: reduce) {
  .page-news .topic-card,
  .page-news .digest-item,
  .page-news .version-item,
  .page-news .rhythm-tick {
    transition: none;
  }

  .page-news .topic-card:hover {
    transform: none;
  }
}