.page-news {
  --news-line: 1px solid var(--hair);
  --news-line-soft: 1px solid var(--hair-soft);
  --news-tint: rgba(27, 38, 48, 0.5);
  --news-lime-veil: rgba(183, 255, 42, 0.08);
  --news-amber-veil: rgba(255, 176, 0, 0.1);
  display: block;
  background: var(--ink-900);
  color: var(--mist-80);
  font-family: var(--font-sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.page-news h1,
.page-news h2,
.page-news h3 {
  font-family: var(--font-serif);
  color: var(--mist);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-news h2 {
  font-size: clamp(1.375rem, 4.6vw, 2.125rem);
  line-height: 1.28;
  margin: 0 0 0.85rem;
}

.page-news h3 {
  font-size: 1.0625rem;
  line-height: 1.45;
  margin: 0;
}

.page-news section[id],
.page-news .news-log__item {
  scroll-margin-top: 5rem;
}

.page-news .page-news__crumb {
  padding: 2rem 1.25rem 0;
  max-width: var(--shell-max);
  margin: 0 auto;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  position: relative;
  overflow: hidden;
  padding: 1.75rem 0 3.25rem;
}

.page-news .news-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: 52%;
  height: 150%;
  background: linear-gradient(200deg, rgba(183, 255, 42, 0.11), rgba(183, 255, 42, 0) 64%);
  transform: skewX(-8deg);
  pointer-events: none;
}

.page-news .news-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--hair-strong) 22%, var(--hair-strong) 78%, transparent);
}

.page-news .news-hero__inner {
  position: relative;
  display: grid;
  gap: 2.25rem;
}

.page-news .news-hero__lead h1 {
  font-size: clamp(1.875rem, 7.4vw, 3.5rem);
  line-height: 1.14;
  margin: 0 0 1.1rem;
}

.page-news .news-hero__lede {
  margin: 0;
  max-width: 46rem;
  font-size: 1rem;
  color: var(--mist-66);
}

.page-news .news-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.page-news .news-hero__board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  padding-top: 1.25rem;
  border-top: var(--news-line);
}

.page-news .news-hero__figure {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 7vw, 2.6rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-news .news-hero__label {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--mist-50);
}

/* ---------- 更新记录 ---------- */
.page-news .news-log {
  padding: 3rem 0 3.25rem;
  background: linear-gradient(180deg, rgba(15, 20, 18, 0.7), rgba(7, 10, 9, 0));
}

.page-news .news-log__intro {
  max-width: 44rem;
  margin-bottom: 2.25rem;
}

.page-news .news-log__note {
  margin: 0;
  color: var(--mist-66);
  font-size: 0.9375rem;
}

.page-news .news-log__layout {
  display: grid;
  gap: 2rem;
}

.page-news .news-log__side-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-news .news-log__index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.page-news .news-log__index a {
  display: block;
  padding: 0.55rem 0.8rem;
  border-left: 2px solid var(--hair);
  color: var(--mist-66);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-news .news-log__index a:hover,
.page-news .news-log__index a:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  background: var(--news-lime-veil);
}

.page-news .news-log__side-note {
  margin: 1.1rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--mist-50);
}

.page-news .news-log__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.75rem;
  border-left: 1px solid var(--hair);
}

.page-news .news-log__item {
  position: relative;
  padding-bottom: 1.9rem;
  margin-bottom: 1.9rem;
  border-bottom: var(--news-line-soft);
  transition: background 0.3s var(--ease);
}

.page-news .news-log__item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-news .news-log__item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 0.5rem;
  width: 9px;
  height: 9px;
  margin-left: -4.5px;
  border-radius: 50%;
  background: var(--lime-deep);
  box-shadow: 0 0 0 4px var(--ink-900);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-news .news-log__item:target::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px var(--ink-900), 0 0 0 7px rgba(183, 255, 42, 0.18);
}

.page-news .news-log__tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.75rem;
  margin-bottom: 0.65rem;
}

.page-news .news-log__phase {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.09em;
  color: var(--mist-50);
}

.page-news .news-log__title {
  font-size: clamp(1.0625rem, 3.6vw, 1.375rem);
  line-height: 1.42;
  color: var(--mist);
  margin: 0 0 0.6rem;
}

.page-news .news-log__summary {
  margin: 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  color: var(--mist-66);
}

.page-news .news-log__detail {
  margin-top: 0.9rem;
}

.page-news .news-log__detail summary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.8rem 0.35rem 0.55rem;
  border: 1px solid rgba(183, 255, 42, 0.28);
  border-radius: var(--radius);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--lime);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease);
}

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

.page-news .news-log__detail summary::marker {
  content: "";
}

.page-news .news-log__detail summary::before {
  content: "+";
  font-size: 0.95rem;
  line-height: 1;
}

.page-news .news-log__detail[open] summary::before {
  content: "\2212";
}

.page-news .news-log__detail summary:hover,
.page-news .news-log__detail summary:focus-visible {
  background: var(--news-lime-veil);
  border-color: rgba(183, 255, 42, 0.55);
}

.page-news .news-log__detail-body {
  margin-top: 0.9rem;
  padding: 0.9rem 1rem;
  border-left: 2px solid rgba(183, 255, 42, 0.38);
  background: var(--news-tint);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--mist-66);
}

.page-news .news-log__detail-body ul {
  margin: 0;
  padding-left: 1.1rem;
}

.page-news .news-log__detail-body li + li {
  margin-top: 0.4rem;
}

/* ---------- 第 18 轮观察 ---------- */
.page-news .round18 {
  padding: 3.25rem 0;
  border-top: var(--news-line-soft);
}

.page-news .round18__inner {
  display: grid;
  gap: 2rem;
}

.page-news .round18__media {
  margin: 0;
}

.page-news .round18__media img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--news-line);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-news .round18__text .eyebrow {
  margin-bottom: 0.6rem;
}

.page-news .round18__lede {
  margin: 0;
  color: var(--mist-66);
  font-size: 0.9375rem;
}

.page-news .round18__list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-news .round18__item {
  display: grid;
  gap: 0.35rem;
  padding: 1rem 0;
  border-top: var(--news-line-soft);
}

.page-news .round18__key {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-news .round18__item p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--mist-66);
}

/* ---------- 版本差异 ---------- */
.page-news .diffs {
  padding: 3.25rem 0;
  border-top: var(--news-line-soft);
  background: linear-gradient(190deg, rgba(27, 38, 48, 0.5), rgba(7, 10, 9, 0) 70%);
}

.page-news .diffs__head {
  max-width: 44rem;
  margin-bottom: 2rem;
}

.page-news .diffs__lede {
  margin: 0;
  color: var(--mist-66);
  font-size: 0.9375rem;
}

.page-news .diffs__grid {
  display: grid;
  gap: 2rem;
}

.page-news .diffs__media {
  margin: 0;
}

.page-news .diffs__media img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--news-line);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-news .diffs__group {
  border-top: var(--news-line);
  padding: 1rem 0 1.15rem;
}

.page-news .diffs__group:last-child {
  border-bottom: var(--news-line);
}

.page-news .diffs__group summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.85rem;
  cursor: pointer;
  list-style: none;
  transition: color 0.22s var(--ease);
}

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

.page-news .diffs__group summary::marker {
  content: "";
}

.page-news .diffs__group summary:hover .diffs__group-title {
  color: var(--lime);
}

.page-news .diffs__group-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--lime-deep);
}

.page-news .diffs__group-title {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  color: var(--mist);
  transition: color 0.22s var(--ease);
}

.page-news .diffs__group-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--mute);
}

.page-news .diffs__body {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.95rem;
}

.page-news .diffs__cell {
  padding: 0.8rem 0.9rem;
  background: rgba(27, 38, 48, 0.45);
  border-left: 2px solid var(--hair-strong);
  border-radius: var(--radius);
}

.page-news .diffs__cell-label {
  display: block;
  margin-bottom: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-news .diffs__cell p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--mist-66);
}

/* ---------- 专题系列 ---------- */
.page-news .topics {
  padding: 3.25rem 0;
  border-top: var(--news-line-soft);
}

.page-news .topics__lede {
  margin: 0;
  max-width: 44rem;
  color: var(--mist-66);
  font-size: 0.9375rem;
}

.page-news .topics__rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(250px, 80%);
  gap: 0.9rem;
  margin-top: 1.75rem;
  padding-bottom: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--lime-deep) transparent;
}

.page-news .topics__rail::-webkit-scrollbar {
  height: 6px;
}

.page-news .topics__rail::-webkit-scrollbar-thumb {
  background: var(--lime-deep);
  border-radius: 3px;
}

.page-news .topics__card {
  display: flex;
  flex-direction: column;
  scroll-snap-align: start;
  border: var(--news-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(180deg, rgba(27, 38, 48, 0.6), rgba(7, 10, 9, 0.2));
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-news .topics__card:hover,
.page-news .topics__card:focus-within {
  border-color: rgba(183, 255, 42, 0.42);
  transform: translateY(-2px);
}

.page-news .topics__card--cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-news .topics__card-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.1rem 1.05rem 1.25rem;
  border-top: 1px solid transparent;
}

.page-news .topics__card-body h3 {
  font-size: 1rem;
  line-height: 1.45;
  color: var(--mist);
}

.page-news .topics__card-body p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--mist-66);
}

.page-news .topics__card-body .tag {
  align-self: flex-start;
}

/* ---------- 回溯指引 ---------- */
.page-news .lookback {
  padding: 3.25rem 0 4.5rem;
  border-top: var(--news-line-soft);
  background: linear-gradient(180deg, rgba(30, 58, 36, 0.22), rgba(7, 10, 9, 0) 62%);
}

.page-news .lookback__inner {
  display: grid;
  gap: 2.25rem;
}

.page-news .lookback__lede {
  margin: 0;
  max-width: 44rem;
  color: var(--mist-66);
  font-size: 0.9375rem;
}

.page-news .lookback__steps {
  counter-reset: step;
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
}

.page-news .lookback__step {
  counter-increment: step;
  position: relative;
  padding: 0 0 1.15rem 2.5rem;
  font-size: 0.9375rem;
  color: var(--mist-66);
}

.page-news .lookback__step:last-child {
  padding-bottom: 0;
}

.page-news .lookback__step::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--lime);
}

.page-news .lookback__step strong {
  display: block;
  margin-bottom: 0.15rem;
  color: var(--mist);
  font-weight: 600;
}

.page-news .lookback__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.75rem;
}

.page-news .lookback__aside {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  color: var(--mist-50);
}

.page-news .lookback__aside a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(183, 255, 42, 0.4);
  transition: border-color 0.2s var(--ease);
}

.page-news .lookback__aside a:hover,
.page-news .lookback__aside a:focus-visible {
  border-bottom-color: var(--lime);
}

.page-news .lookback__media {
  margin: 0;
}

.page-news .lookback__media img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--news-line);
  border-radius: var(--radius);
  background: var(--ink-700);
}

.page-news .media-frame__caption {
  display: block;
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--mist-50);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-news .round18__item {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }

  .page-news .diffs__body {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-news .news-hero {
    padding: 2.5rem 0 4rem;
  }

  .page-news .news-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(230px, 0.6fr);
    align-items: end;
    gap: 3.5rem;
  }

  .page-news .news-hero__board {
    grid-template-columns: 1fr;
    gap: 1.1rem;
    padding-top: 1.5rem;
  }

  .page-news .news-hero__cell {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    padding-bottom: 0.9rem;
    border-bottom: var(--news-line-soft);
  }

  .page-news .news-hero__cell:last-child {
    border-bottom: 0;
  }

  .page-news .news-hero__label {
    margin-top: 0;
    text-align: right;
  }

  .page-news .news-log__layout {
    grid-template-columns: 215px minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-news .news-log__side {
    position: sticky;
    top: 2.5rem;
  }

  .page-news .round18__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    gap: 3.25rem;
    align-items: start;
  }

  .page-news .diffs__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 3.25rem;
    align-items: start;
  }

  .page-news .topics__rail {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    overflow: visible;
    scroll-snap-type: none;
    padding-bottom: 0;
  }

  .page-news .lookback__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 3.5rem;
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-news .news-hero__lead h1 {
    max-width: 18ch;
  }

  .page-news .news-log__list {
    padding-left: 2rem;
  }

  .page-news .news-log__item::before {
    left: -2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .topics__card,
  .page-news .news-log__index a,
  .page-news .news-log__detail summary,
  .page-news .diffs__group-title,
  .page-news .news-log__item::before {
    transition: none;
  }

  .page-news .topics__card:hover,
  .page-news .topics__card:focus-within {
    transform: none;
  }
}