.page-news {
  --news-accent-line: rgba(215, 225, 234, .16);
  --news-rail-width: 13rem;
}

/* ---------- 首屏 ---------- */

.page-news .news-hero-band {
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(2.25rem, 5.5vw, 4.25rem);
  background:
    radial-gradient(115% 130% at 88% 0%, rgba(255, 106, 42, .16), transparent 56%),
    linear-gradient(180deg, #0B1F33 0%, #071522 100%);
  border-bottom: 1px solid var(--hair);
}

.page-news .news-hero {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-news .news-hero__title {
  margin: .55rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 7vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -.012em;
  color: var(--paper);
  max-width: 17ch;
}

.page-news .news-hero__lede {
  margin: 1.1rem 0 0;
  max-width: 54ch;
  font-size: clamp(1rem, 2.4vw, 1.06rem);
  line-height: 1.78;
  color: var(--fg);
}

.page-news .news-hero__meta {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: .7rem;
  max-width: 34rem;
}

.page-news .news-hero__meta li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .3rem .8rem;
  padding-bottom: .6rem;
  border-bottom: 1px solid var(--hair);
}

.page-news .news-k {
  font-family: var(--font-mono);
  font-size: .66rem;
  line-height: 1.2;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.page-news .news-v {
  font-size: .94rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
}

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

.page-news .news-hero__media img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 通用区块 ---------- */

.page-news .news-band {
  padding-block: clamp(2.5rem, 6vw, 4.25rem);
}

/* ---------- 置顶公告 ---------- */

.page-news .news-pin {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  padding: clamp(1.25rem, 3.2vw, 2rem);
  border: 1px solid var(--hair-strong);
  border-left: 4px solid var(--signal);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(142deg, rgba(255, 106, 42, .13), transparent 48%),
    var(--command);
  box-shadow: var(--shadow-panel);
}

.page-news .news-pin__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
}

.page-news .news-pin__rev {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--signal);
}

.page-news .news-pin__title {
  margin: 1rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 3.4vw, 1.6rem);
  line-height: 1.32;
  color: var(--paper);
}

.page-news .news-pin__text {
  margin: .8rem 0 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--fg);
  max-width: 60ch;
}

.page-news .news-pin__facts {
  margin: 1.35rem 0 0;
  display: grid;
  gap: .85rem;
}

.page-news .news-pin__facts > div {
  display: grid;
  gap: .25rem;
  padding-top: .75rem;
  border-top: 1px solid var(--hair);
}

.page-news .news-pin__facts dt {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-news .news-pin__facts dd {
  margin: 0;
  font-size: .9rem;
  line-height: 1.68;
  color: var(--paper);
}

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

.page-news .news-pin__media img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 折叠明细 ---------- */

.page-news .news-more {
  margin-top: .9rem;
}

.page-news .news-more > summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  min-height: 2rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .07em;
  color: var(--link);
}

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

.page-news .news-more > summary::before {
  content: "+";
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  line-height: 1.05rem;
  text-align: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: .8rem;
  transition: transform .25s var(--ease);
}

.page-news .news-more[open] > summary::before {
  content: "–";
  transform: rotate(180deg);
}

.page-news .news-more > summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: var(--radius-pill);
}

.page-news .news-more__list {
  margin: .75rem 0 0;
  padding-left: 1.15rem;
  border-left: 2px solid var(--signal-soft);
  display: grid;
  gap: .45rem;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--fg);
}

/* ---------- 时间轴骨架 ---------- */

.page-news .news-track {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}

.page-news .news-rail__label {
  margin: 0 0 .55rem;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-news .news-rail__label + .news-filter + .news-rail__label,
.page-news .news-filter + .news-rail__label {
  margin-top: 1.4rem;
}

.page-news .news-filter {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-news .news-filter__item {
  display: inline-block;
  padding: .5rem .95rem;
  border: 1px solid var(--hair-strong);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: .76rem;
  line-height: 1;
  letter-spacing: .07em;
  color: var(--fg);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease);
}

.page-news .news-filter__item:hover,
.page-news .news-filter__item:focus-visible {
  border-color: var(--signal);
  color: var(--paper);
}

.page-news .news-filter__item.is-active {
  background: var(--signal);
  border-color: var(--signal);
  color: #06121F;
}

.page-news .news-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.page-news .news-legend li {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: .87rem;
  line-height: 1.4;
  color: var(--fg);
}

.page-news .news-dot {
  flex: none;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
}

.page-news .news-dot--dynamic { background: var(--link); }
.page-news .news-dot--route { background: var(--signal); }
.page-news .news-dot--product { background: var(--green); }
.page-news .news-dot--screen { background: var(--amber); }
.page-news .news-dot--tutorial { background: var(--silver); }

/* ---------- 时间轴阶段与条目 ---------- */

.page-news .news-stage + .news-stage {
  margin-top: clamp(2.25rem, 5.5vw, 3.5rem);
}

.page-news .news-stage__head {
  display: flex;
  align-items: center;
  gap: .8rem;
  padding-bottom: .85rem;
  border-bottom: 1px solid var(--hair-strong);
}

.page-news .news-stage__marker {
  flex: none;
  width: .6rem;
  height: .6rem;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(255, 106, 42, .16);
}

.page-news .news-stage__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.8vw, 1.3rem);
  line-height: 1.2;
  color: var(--paper);
}

.page-news .news-stage__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-news .news-stage__media {
  margin: 1.15rem 0 0;
}

.page-news .news-stage__media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-news .news-list {
  list-style: none;
  margin: 1.15rem 0 0;
  padding: 0;
  display: grid;
  gap: .9rem;
}

.page-news .news-item {
  position: relative;
  padding: clamp(1rem, 2.6vw, 1.3rem);
  padding-left: calc(clamp(1rem, 2.6vw, 1.3rem) + .45rem);
  border: 1px solid var(--news-accent-line);
  border-radius: var(--radius-md);
  background: rgba(215, 225, 234, .035);
  transition: background-color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}

.page-news .news-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: 2px 0 0 2px;
  background: var(--item-accent, var(--hair-strong));
  opacity: .8;
}

.page-news .news-item:hover {
  border-color: var(--hair-strong);
  background: rgba(215, 225, 234, .06);
  transform: translateY(-2px);
}

.page-news .news-item--dynamic { --item-accent: var(--link); }
.page-news .news-item--route { --item-accent: var(--signal); }
.page-news .news-item--product { --item-accent: var(--green); }
.page-news .news-item--screen { --item-accent: var(--amber); }
.page-news .news-item--tutorial { --item-accent: var(--silver); }

.page-news .news-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem .7rem;
  margin-bottom: .7rem;
}

.page-news .news-tag {
  display: inline-block;
  padding: .33rem .6rem;
  border: 1px solid currentColor;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: .66rem;
  line-height: 1;
  letter-spacing: .1em;
  white-space: nowrap;
}

.page-news .news-tag--dynamic { color: var(--link); }
.page-news .news-tag--route { color: var(--signal); }
.page-news .news-tag--product { color: var(--green); }
.page-news .news-tag--screen { color: var(--amber); }
.page-news .news-tag--tutorial { color: var(--silver); }

.page-news .news-item__rev {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .09em;
  color: var(--muted);
}

.page-news .news-item__title {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1rem, 2.5vw, 1.12rem);
  line-height: 1.45;
  color: var(--paper);
}

.page-news .news-item__text {
  margin: 0;
  max-width: 62ch;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--fg);
}

.page-news .news-item__text a {
  color: var(--link);
  text-underline-offset: .2em;
}

/* ---------- 版本号索引 ---------- */

.page-news .news-versions {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  border: 1px solid var(--hair-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--command);
}

.page-news .news-versions__head {
  display: none;
}

.page-news .news-versions__row {
  display: grid;
  gap: .45rem;
  padding: 1rem clamp(1rem, 2.8vw, 1.4rem);
  border-top: 1px solid var(--hair);
}

.page-news .news-versions__row:first-child {
  border-top: 0;
}

.page-news .news-versions__rev {
  font-family: var(--font-mono);
  font-size: .84rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .03em;
  color: var(--signal);
}

.page-news .news-versions__scope {
  font-size: .9rem;
  line-height: 1.65;
  color: var(--paper);
}

.page-news .news-versions__change {
  font-size: .9rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 每周摘要 ---------- */

.page-news .news-digest-band {
  background: var(--paper);
}

.page-news .news-digest-band .section__title {
  color: var(--ink);
}

.page-news .news-digest-band .section__note {
  color: rgba(5, 10, 15, .55);
}

.page-news .news-digest {
  display: grid;
  gap: 1rem;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}

.page-news .news-digest__card {
  display: grid;
  gap: .55rem;
  align-content: start;
  padding: clamp(1.1rem, 2.8vw, 1.4rem);
  border: 1px solid rgba(5, 10, 15, .12);
  border-top: 3px solid var(--signal);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .74);
}

.page-news .news-digest__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--ink);
}

.page-news .news-digest__text {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(5, 10, 15, .72);
}

.page-news .news-digest__link {
  justify-self: start;
  margin-top: .3rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--command);
  text-underline-offset: .28em;
}

.page-news .news-digest__after {
  margin: 1.5rem 0 0;
  font-size: .9rem;
  line-height: 1.75;
  color: rgba(5, 10, 15, .68);
}

.page-news .news-digest__after a {
  color: var(--command);
  text-underline-offset: .2em;
}

/* ---------- 响应式 ---------- */

@media (max-width: 59.98rem) {
  .page-news .news-rail {
    position: sticky;
    top: 0;
    z-index: 5;
    padding: .85rem 0 .7rem;
    background: linear-gradient(180deg, #0B1F33 76%, rgba(11, 31, 51, 0));
  }

  .page-news .news-filter {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: .3rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

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

  .page-news .news-filter__item {
    flex: 0 0 auto;
  }
}

@media (min-width: 48rem) {
  .page-news .news-pin__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 56rem) {
  .page-news .news-pin {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .85fr);
    align-items: start;
  }

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

@media (min-width: 60rem) {
  .page-news .news-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: end;
  }

  .page-news .news-hero__main {
    padding-right: 1.5rem;
  }

  .page-news .news-track {
    grid-template-columns: var(--news-rail-width) minmax(0, 1fr);
    gap: clamp(2rem, 4.5vw, 3.5rem);
    align-items: start;
  }

  .page-news .news-rail {
    position: sticky;
    top: 5.5rem;
    align-self: start;
  }

  .page-news .news-versions__head {
    display: grid;
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr) minmax(0, 1.25fr);
    gap: .9rem;
    padding: .85rem clamp(1rem, 2.8vw, 1.4rem);
    font-family: var(--font-mono);
    font-size: .66rem;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--muted);
    background: rgba(215, 225, 234, .05);
  }

  .page-news .news-versions__row {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr) minmax(0, 1.25fr);
    gap: .9rem;
    align-items: baseline;
  }
}

@media (min-width: 75rem) {
  .page-news .news-hero__title {
    font-size: 3.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .news-item,
  .page-news .news-filter__item,
  .page-news .news-more > summary::before {
    transition: none;
  }

  .page-news .news-item:hover {
    transform: none;
  }
}