.page-news{
  --news-rule: 1px solid var(--snow);
  background: var(--paper);
  color: var(--graphite);
}
.page-news .news-top{ padding-top: 26px; }

/* ---------- 首屏 ---------- */
.page-news .news-hero{
  display: grid;
  gap: 26px;
  padding: 20px 0 54px;
}
.page-news .news-hero__kicker{
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist-ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-news .news-hero__kicker::before{
  content: "";
  width: 26px;
  height: 8px;
  background: var(--signal);
  border: 2px solid var(--graphite);
  display: inline-block;
}
.page-news .news-hero h1{
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(31px, 6.2vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  max-width: 16em;
}
.page-news .news-hero__lead{
  margin: 0 0 24px;
  max-width: 30em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-news .news-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-news .news-hero__panel{
  background: var(--graphite);
  color: var(--paper);
  border: var(--line) solid var(--graphite);
  box-shadow: 6px 6px 0 var(--signal);
  padding: 20px 20px 22px;
}
.page-news .news-hero__panel-title{
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--signal);
}
.page-news .news-hero__list{
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-news .news-hero__list li{
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 0;
  font-size: 14.5px;
  line-height: 1.65;
  border-top: 1px solid rgba(250, 247, 240, .22);
}
.page-news .news-hero__list li:first-child{ border-top: 0; padding-top: 0; }
.page-news .news-hero__time{
  flex: 0 0 auto;
  font-size: 11.5px;
  color: var(--amber);
  letter-spacing: .04em;
}

@media (min-width: 900px){
  .page-news .news-hero{
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
    gap: 56px;
    padding: 30px 0 78px;
  }
  .page-news .news-hero__panel{ margin-bottom: 6px; }
}

/* ---------- 吸顶筛选条 ---------- */
.page-news .news-filter{
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--paper);
  border-top: var(--line) solid var(--graphite);
  border-bottom: var(--line) solid var(--graphite);
}
.page-news .anchor-stop{
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}
.page-news .news-filter__inner{
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.page-news .news-filter__label{
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--mist-ink);
  padding-right: 4px;
}
.page-news .news-filter__link{
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--graphite);
  text-decoration: none;
  background: var(--lift);
  border: 2px solid var(--graphite);
  box-shadow: var(--shadow-sm);
  transition: transform 160ms var(--ease), background 160ms var(--ease), box-shadow 160ms var(--ease);
}
.page-news .news-filter__link:hover{ transform: translate(-1px, -1px); }
.page-news .news-filter__link:focus-visible{
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}
.page-news .dot{
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--graphite);
  display: inline-block;
  flex: 0 0 auto;
}
.page-news .dot--version{ background: var(--coral); }
.page-news .dot--change{ background: var(--amber); }
.page-news .dot--migrate{ background: var(--signal); }
.page-news .dot--tool{ background: var(--mist); }

.page-news:has(#f-version:target) .news-filter__link[data-filter="version"],
.page-news:has(#f-change:target) .news-filter__link[data-filter="change"],
.page-news:has(#f-migrate:target) .news-filter__link[data-filter="migrate"],
.page-news:has(#f-tool:target) .news-filter__link[data-filter="tool"]{
  background: var(--signal);
  box-shadow: none;
  transform: translate(2px, 2px);
}
.page-news:has(#f-version:target) .news-item:not([data-cat="version"]),
.page-news:has(#f-change:target) .news-item:not([data-cat="change"]),
.page-news:has(#f-migrate:target) .news-item:not([data-cat="migrate"]),
.page-news:has(#f-tool:target) .news-item:not([data-cat="tool"]){
  display: none;
}

/* ---------- 条目列表 ---------- */
.page-news .news-body{ padding: 42px 0 62px; }
.page-news .news-listhead{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 22px;
  padding-bottom: 16px;
  border-bottom: var(--line) solid var(--graphite);
}
.page-news .news-listhead__title{
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.2;
}
.page-news .news-listhead .note{ margin: 0; }

.page-news .news-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.page-news .news-item{
  border-bottom: var(--news-rule);
  padding: 22px 0;
}
.page-news .news-item__inner{ display: block; }
.page-news .news-item__meta{
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
}
.page-news .news-item__cat{
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-soft);
}
.page-news .news-item__time{
  font-size: 11.5px;
  color: var(--mist-ink);
  padding-left: 9px;
  border-left: 1px solid var(--snow);
}
.page-news .news-item__title{
  margin: 9px 0 7px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.38;
  transition: color 160ms var(--ease);
}
.page-news .news-item:hover .news-item__title{ color: var(--signal-ink); }
.page-news .news-item__sum{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.page-news .news-item__more{
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist-ink);
}
.page-news .news-item__figure{ margin: 16px 0 0; }
.page-news .news-item__figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--line) solid var(--graphite);
  box-shadow: var(--shadow-sm);
  object-fit: cover;
}
.page-news .news-item--lead{ padding: 26px 0 30px; }
.page-news .news-item--lead .news-item__title{
  font-size: clamp(23px, 3.6vw, 33px);
}
.page-news .news-item--lead .news-item__figure img{ aspect-ratio: 3 / 2; }

.page-news .news-item--thumb .news-item__inner{
  display: grid;
  grid-template-columns: minmax(0, 1fr) 104px;
  gap: 16px;
  align-items: start;
}
.page-news .news-item--thumb .news-item__figure{ margin: 0; }
.page-news .news-item--thumb .news-item__figure img{
  aspect-ratio: 4 / 3;
  box-shadow: none;
}

@media (min-width: 900px){
  .page-news .news-list{
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 56px;
  }
  .page-news .news-item--lead{ grid-column: 1 / -1; }
  .page-news .news-item--lead .news-item__inner{
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: 40px;
    align-items: center;
  }
  .page-news .news-item--lead .news-item__figure{ margin: 0; }
  .page-news .news-item--thumb .news-item__inner{ grid-template-columns: minmax(0, 1fr) 128px; }

  .page-news .news-item__more{
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition: max-height 200ms var(--ease), opacity 200ms var(--ease), margin-top 200ms var(--ease);
  }
  .page-news .news-item:hover .news-item__more,
  .page-news .news-item:focus-within .news-item__more{
    max-height: 48px;
    opacity: 1;
    margin-top: 10px;
  }
}

/* ---------- 专题合集 ---------- */
.page-news .news-topics{
  position: relative;
  overflow: hidden;
  background: var(--snow);
  border-top: var(--line) solid var(--graphite);
  border-bottom: var(--line) solid var(--graphite);
  padding: 46px 0 56px;
}
.page-news .news-topics__bg{
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
  pointer-events: none;
}
.page-news .news-topics__inner{ position: relative; }
.page-news .news-topics__grid{
  display: grid;
  gap: 16px;
  margin-top: 26px;
}
.page-news .topic{
  background: var(--lift);
  border: var(--line) solid var(--graphite);
  box-shadow: var(--shadow-sm);
  padding: 14px 16px 16px;
}
.page-news .topic[open]{ box-shadow: var(--shadow-hard); }
.page-news .topic__head{
  display: flex;
  align-items: center;
  gap: 9px;
  cursor: pointer;
  list-style: none;
}
.page-news .topic__head::-webkit-details-marker{ display: none; }
.page-news .topic__head::after{
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 17px;
  line-height: 1;
  color: var(--signal-ink);
}
.page-news .topic[open] .topic__head::after{ content: "−"; }
.page-news .topic__name{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.3;
}
.page-news .topic__count{
  font-size: 11.5px;
  color: var(--mist-ink);
  letter-spacing: .04em;
}
.page-news .topic__desc{
  margin: 12px 0 6px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}
.page-news .topic__list{
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-news .topic__list li{
  position: relative;
  padding: 7px 0 7px 16px;
  font-size: 13.5px;
  line-height: 1.6;
  border-top: 1px dashed rgba(25, 28, 27, .16);
}
.page-news .topic__list li::before{
  content: "—";
  position: absolute;
  left: 0;
  color: var(--mist);
}

@media (min-width: 820px){
  .page-news .news-topics__grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
}

/* ---------- 读者来信 ---------- */
.page-news .news-ask{
  padding: 54px 0 70px;
  background: var(--paper);
}
.page-news .news-ask__inner{
  display: grid;
  gap: 28px;
}
.page-news .news-ask__title{
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 42px);
  line-height: 1.15;
  max-width: 15em;
}
.page-news .news-ask__text{
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 34em;
}
.page-news .news-ask__mail{
  display: inline-block;
  margin: 0 0 12px;
  padding: 6px 12px;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--graphite);
  background: var(--lift);
  border: 2px solid var(--graphite);
  border-left: 8px solid var(--amber);
  box-shadow: var(--shadow-sm);
}
.page-news .news-ask__hint{
  margin: 0 0 22px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist-ink);
  max-width: 34em;
}
.page-news .news-ask__steps{
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-news .news-ask__steps li{
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 12px 0;
  font-size: 15px;
  line-height: 1.6;
  border-top: 1px solid var(--snow);
}
.page-news .news-ask__steps li:first-child{ border-top: 0; }
.page-news .news-ask__steps .mono{
  font-size: 20px;
  font-weight: 600;
  color: var(--signal-ink);
}

@media (min-width: 880px){
  .page-news .news-ask__inner{
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
  .page-news .news-ask__steps{
    padding-top: 6px;
    border-left: var(--line) solid var(--graphite);
    padding-left: 26px;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-news .news-filter__link,
  .page-news .news-item__title,
  .page-news .news-item__more{
    transition: none;
  }
  .page-news .news-filter__link:hover{ transform: none; }
}