.page-news {
  --news-rail: 176px;
  --news-ring: 0 0 0 3px var(--yb-cyan);
}

/* ============ 头条观察 ============ */
.page-news .news-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--yb-header-h) + clamp(40px, 7vw, 88px));
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-news .news-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--yb-cyan) 0%, var(--yb-orange) 58%, transparent 100%);
  opacity: 0.8;
}

.page-news .news-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 22%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(22, 224, 200, 0.16) 0%, transparent 68%);
  pointer-events: none;
}

.page-news .news-hero__crumb {
  margin-bottom: clamp(26px, 4vw, 52px);
}

.page-news .news-hero__top {
  position: relative;
  display: grid;
  gap: 16px;
  max-width: 62ch;
}

.page-news .news-hero__title {
  margin: 0;
  font-size: clamp(40px, 7.4vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  font-weight: 900;
  overflow-wrap: break-word;
}

.page-news .news-hero__lede {
  max-width: 48ch;
  margin: 0;
}

.page-news .news-hero__grid {
  margin-top: clamp(36px, 6vw, 76px);
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

/* 头条卡 */
.page-news .news-lead {
  display: grid;
  border: 2px solid var(--yb-line);
  background: var(--yb-surface);
  box-shadow: var(--yb-shadow-card);
  transition: transform 220ms var(--yb-ease), box-shadow 220ms var(--yb-ease);
}

.page-news .news-lead:hover {
  transform: translateY(-4px);
}

.page-news .news-lead__media {
  overflow: hidden;
}

.page-news .news-lead__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-news .news-lead__body {
  display: grid;
  gap: 14px;
  padding: clamp(20px, 3vw, 34px);
}

.page-news .news-lead__meta {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-news .news-lead__time {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--yb-muted);
}

.page-news .news-lead__title {
  margin: 0;
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  font-weight: 800;
}

.page-news .news-lead__text {
  margin: 0;
  max-width: 60ch;
}

.page-news .news-lead__link {
  justify-self: start;
  font-weight: 700;
  font-size: 15px;
  color: var(--yb-cyan);
  text-decoration: none;
  padding: 2px 4px;
  border-bottom: 2px solid var(--yb-cyan);
  transition: background 200ms var(--yb-ease), color 200ms var(--yb-ease);
}

.page-news .news-lead__link:hover,
.page-news .news-lead__link:focus-visible {
  background: var(--yb-cyan);
  color: var(--yb-navy);
  border-color: var(--yb-cyan);
}

/* 头条索引 */
.page-news .news-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  align-content: start;
}

.page-news .news-index-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 18px 0;
  border-top: 1px solid var(--yb-line);
}

.page-news .news-index-item:last-child {
  border-bottom: 1px solid var(--yb-line);
}

.page-news .news-index-item__no {
  font-size: 14px;
  font-weight: 700;
  color: var(--yb-yellow);
  letter-spacing: 0.06em;
}

.page-news .news-index-item__link {
  color: var(--yb-fg);
  text-decoration: none;
  font-weight: 700;
  line-height: 1.42;
  transition: color 200ms var(--yb-ease);
}

.page-news .news-index-item__link:hover,
.page-news .news-index-item__link:focus-visible {
  color: var(--yb-cyan);
}

.page-news .news-index-item__tag {
  grid-column: 2;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--yb-muted);
}

/* ============ 条目流 ============ */
.page-news .news-stream__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-news .news-stream__intro {
  margin: 0;
  max-width: 62ch;
  color: var(--yb-muted);
}

.page-news .news-filter {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-news .news-filter__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}

.page-news .news-filter__rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

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

.page-news .news-filter__btn {
  cursor: pointer;
  flex: 0 0 auto;
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
  padding: 10px 14px;
  white-space: nowrap;
  background: var(--yb-cyan);
  color: var(--yb-navy);
  border: 2px solid var(--yb-navy);
  user-select: none;
  transition: background 200ms var(--yb-ease), color 200ms var(--yb-ease),
    border-color 200ms var(--yb-ease);
}

.page-news .news-filter__btn:hover {
  background: var(--yb-mist);
}

.page-news .news-filter__input:focus-visible + .news-filter__btn {
  box-shadow: var(--news-ring);
}

.page-news .news-filter__input:checked + .news-filter__btn {
  background: var(--yb-orange);
  color: var(--yb-navy);
  border-color: var(--yb-orange);
}

/* 列表 */
.page-news .news-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 3px solid var(--yb-fg);
}

.page-news .news-entry {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 0 12px;
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-bottom: 1px solid var(--yb-line);
}

.page-news .news-entry:nth-child(3n) {
  border-bottom-width: 3px;
  border-bottom-color: var(--yb-fg);
}

.page-news .news-entry::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--yb-cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 220ms var(--yb-ease);
}

.page-news .news-entry:hover::before,
.page-news .news-entry:focus-within::before {
  transform: scaleY(1);
}

.page-news .news-entry__no {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--yb-muted);
  padding-top: 3px;
  transition: color 200ms var(--yb-ease);
}

.page-news .news-entry:hover .news-entry__no,
.page-news .news-entry:focus-within .news-entry__no {
  color: var(--yb-orange);
}

.page-news .news-entry__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-news .news-entry__text {
  margin: 0 0 12px;
  max-width: 68ch;
  color: var(--yb-muted);
  line-height: 1.75;
}

.page-news .news-entry__meta {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-news .news-entry__time {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--yb-muted);
}

.page-news .news-entry__figure {
  margin: 16px 0 0;
}

.page-news .news-entry__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 2px solid var(--yb-fg);
}

.page-news .news-entry__figure figcaption {
  margin-top: 8px;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--yb-muted);
}

/* 纯 CSS 栏目筛选 */
.page-news .news-filter:has(#nf-time:checked) .news-entry:not([data-cat="time"]),
.page-news .news-filter:has(#nf-version:checked) .news-entry:not([data-cat="version"]),
.page-news .news-filter:has(#nf-venue:checked) .news-entry:not([data-cat="venue"]),
.page-news .news-filter:has(#nf-media:checked) .news-entry:not([data-cat="media"]) {
  display: none;
}

/* ============ 专题系列 ============ */
.page-news .news-series__head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-news .news-series__intro {
  margin: 0;
  max-width: 58ch;
  color: var(--yb-muted);
}

.page-news .news-series__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-news .news-series__art {
  margin: 0;
  align-self: start;
}

.page-news .news-series__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 2px solid var(--yb-line);
}

.page-news .news-series__art figcaption {
  margin-top: 10px;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--yb-muted);
}

.page-news .news-series__list {
  display: grid;
  border-top: 1px solid var(--yb-line);
}

.page-news .series-card {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 2.6vw, 30px) 0;
  border-bottom: 1px solid var(--yb-line);
}

.page-news .series-card__label {
  justify-self: start;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  background: var(--yb-yellow);
  color: var(--yb-navy);
}

.page-news .series-card__title {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.24;
  font-weight: 800;
}

.page-news .series-card__text {
  margin: 0;
  max-width: 62ch;
  color: var(--yb-muted);
  line-height: 1.75;
}

.page-news .series-card__link {
  justify-self: start;
  font-size: 14px;
  font-weight: 700;
  color: var(--yb-cyan);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  transition: color 200ms var(--yb-ease), border-color 200ms var(--yb-ease);
}

.page-news .series-card__link:hover,
.page-news .series-card__link:focus-visible {
  color: var(--yb-yellow);
}

/* ============ 编辑推荐与订阅 ============ */
.page-news .news-picks__head {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-news .news-picks__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-news .news-picks__aside {
  display: grid;
  gap: clamp(22px, 3vw, 32px);
  align-content: start;
}

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

.page-news .news-picks__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 2px solid var(--yb-navy);
}

.page-news .news-picks__figure figcaption {
  margin-top: 10px;
  font-family: var(--yb-font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--yb-graphite);
}

.page-news .news-sub {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  background: var(--yb-navy);
  color: var(--yb-paper);
  border: 2px solid var(--yb-navy);
}

.page-news .news-sub__wave {
  display: block;
  width: 100%;
  height: 12px;
  color: var(--yb-cyan);
  margin-bottom: 14px;
}

.page-news .news-sub__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.24;
  font-weight: 800;
}

.page-news .news-sub__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 246, 248, 0.78);
}

.page-news .news-sub__mail {
  color: var(--yb-yellow);
  font-size: 14px;
  overflow-wrap: anywhere;
}

.page-news .news-picks__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  align-content: start;
  border-top: 3px solid var(--yb-navy);
}

.page-news .pick-item {
  display: grid;
  gap: 6px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid rgba(42, 53, 71, 0.2);
}

.page-news .pick-item__link {
  color: var(--yb-graphite);
  text-decoration: none;
  font-weight: 800;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.34;
  transition: color 200ms var(--yb-ease);
}

.page-news .pick-item__link:hover,
.page-news .pick-item__link:focus-visible {
  color: var(--yb-orange);
}

.page-news .pick-item__note {
  font-family: var(--yb-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(42, 53, 71, 0.72);
}

.page-news .news-picks__foot {
  margin-top: clamp(36px, 5vw, 64px);
  display: grid;
  gap: 16px;
}

.page-news .news-picks__foot-text {
  margin: 0;
  max-width: 64ch;
  color: var(--yb-graphite);
  line-height: 1.75;
}

.page-news .news-picks__actions {
  gap: 12px;
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-news .news-entry--photo .news-entry__body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 280px);
    gap: 24px 32px;
    align-items: start;
  }

  .page-news .news-entry--photo .news-entry__figure {
    margin: 0;
  }
}

@media (min-width: 900px) {
  .page-news .news-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-news .news-filter {
    grid-template-columns: var(--news-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-news .news-filter__rail {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    position: sticky;
    top: calc(var(--yb-header-h) + 24px);
    border-top: 3px solid var(--yb-fg);
  }

  .page-news .news-filter__btn {
    width: 100%;
    text-align: left;
    padding: 14px 12px;
    font-size: 15px;
    background: transparent;
    color: var(--yb-fg);
    border: 0;
    border-bottom: 1px solid var(--yb-line);
  }

  .page-news .news-filter__btn:hover {
    background: var(--yb-mist);
    color: var(--yb-navy);
  }

  .page-news .news-filter__input:checked + .news-filter__btn {
    background: var(--yb-orange);
    color: var(--yb-navy);
    border-bottom-color: var(--yb-orange);
  }

  .page-news .news-series__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-news .news-picks__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-news .news-entry__body {
    transition: margin-left 240ms var(--yb-ease);
  }

  .page-news .news-entry:nth-child(3n + 2) .news-entry__body {
    margin-left: 32px;
  }

  .page-news .news-entry:nth-child(4n) .news-entry__body {
    margin-left: 64px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news *,
  .page-news *::before,
  .page-news *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}