.page-news {
  --news-paper-ink: #0B1421;
  --news-paper-muted: #4E5C72;
  --news-paper-line: rgba(11, 20, 33, .16);
  background: var(--ink-900);
  color: var(--text-100);
}

.page-news figure { margin: 0; }

.page-news .breadcrumb { padding-block: 14px 0; }

/* 首屏框景 */
.page-news .masthead {
  position: relative;
  margin-top: 10px;
  border-top: 1px solid var(--line-500);
  border-bottom: 1px solid var(--line-500);
  background: var(--ink-800);
}

.page-news .masthead::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 64px;
  height: 2px;
  background: var(--cyan-400);
}

.page-news .masthead__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(28px, 6vw, 64px);
}

.page-news .masthead__eyebrow {
  margin: 0;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--cyan-200);
}

.page-news .masthead__title {
  margin: .38em 0 0;
  font-size: clamp(32px, 7.2vw, 64px);
  line-height: 1.02;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--text-100);
  overflow-wrap: anywhere;
}

.page-news .masthead__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-500);
}

.page-news .facts__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-500);
  font-size: 14px;
}

.page-news .facts__k { color: var(--text-400); }
.page-news .facts__v { color: var(--cyan-200); font-size: 13px; letter-spacing: .05em; }

.page-news .masthead__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-400);
}

/* 列表章节 */
.page-news .topics__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-news .topics__title {
  margin: 0;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.15;
  font-weight: 800;
  color: var(--text-100);
}

.page-news .topics__intro {
  margin: 0;
  max-width: 62ch;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .topics__fig { margin-bottom: 22px; }

/* 筛选带 */
.page-news .filter {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding: 2px 0 14px;
  border-bottom: 1px solid var(--line-500);
}

.page-news .filter input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-news .filter label {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line-500);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.2;
  color: var(--text-400);
  white-space: nowrap;
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease),
              background-color 160ms var(--ease);
}

.page-news .filter label:hover {
  color: var(--text-100);
  border-color: var(--cyan-400);
}

.page-news .filter input:checked + label {
  background: var(--amber-500);
  border-color: var(--amber-500);
  color: var(--ink-on-paper);
  font-weight: 700;
}

.page-news .filter input:focus-visible + label {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

/* 筛选联动 */
.page-news .filter:has(#f-entry:checked) ~ .feedwrap .feed__item:not([data-cat="entry"]),
.page-news .filter:has(#f-device:checked) ~ .feedwrap .feed__item:not([data-cat="device"]),
.page-news .filter:has(#f-sub:checked) ~ .feedwrap .feed__item:not([data-cat="sub"]),
.page-news .filter:has(#f-doc:checked) ~ .feedwrap .feed__item:not([data-cat="doc"]) {
  display: none;
}

/* 双轨阅读 */
.page-news .feedwrap { margin-top: 24px; }

.page-news .feed {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-500);
}

.page-news .feed__item {
  position: relative;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 16px 8px 16px 12px;
  border-bottom: 1px solid var(--line-500);
  transition: background-color 160ms var(--ease);
}

.page-news .feed__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan-400);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 160ms var(--ease);
}

.page-news .feed__item:hover { background: var(--ink-800); }

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

.page-news .feed__no {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-400);
  opacity: .65;
}

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

.page-news .feed__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-news .feed__time {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--text-400);
  white-space: nowrap;
}

.page-news .feed__title {
  margin: 8px 0 0;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.4;
  font-weight: 700;
  color: var(--text-100);
  overflow-wrap: anywhere;
}

.page-news .feed__text {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-400);
}

.page-news .feed__more { margin-top: 10px; }

.page-news .feed__more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  padding-bottom: 1px;
  font-size: 13px;
  color: var(--cyan-200);
  border-bottom: 1px dashed rgba(155, 245, 236, .35);
  cursor: pointer;
}

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

.page-news .feed__more summary::before {
  content: "+";
  font-family: var(--font-mono);
}

.page-news .feed__more[open] summary::before { content: "−"; }

.page-news .feed__more p {
  margin: 9px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-400);
}

.page-news .feed__k {
  display: inline-block;
  min-width: 34px;
  margin-right: 8px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan-400);
}

/* 右侧窄栏 */
.page-news .side { margin-top: 30px; }
.page-news .side__strip { display: none; }

.page-news .side__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--text-400);
}

.page-news .side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-500);
}

.page-news .side__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-500);
  font-size: 14px;
  color: var(--text-100);
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-news .side__link:hover,
.page-news .side__link:focus-visible { color: var(--cyan-400); }

.page-news .side__meta {
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--text-400);
  white-space: nowrap;
}

.page-news .side__card {
  margin-top: 20px;
  padding: 16px;
  background: var(--ink-800);
  border: 1px solid var(--line-500);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

.page-news .side__cardtitle {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-100);
}

.page-news .side__cardtext {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-400);
}

.page-news .side__cta {
  display: inline-block;
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--amber-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 165, 31, .45);
}

.page-news .side__cta:hover,
.page-news .side__cta:focus-visible { color: var(--amber-600); }

/* 变更说明读法：亮带 */
.page-news .readband {
  background: var(--paper-050);
  color: var(--news-paper-ink);
  padding-block: clamp(40px, 6vw, 84px);
}

.page-news .readband__grid {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.page-news .readband__eyebrow {
  margin: 0;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--amber-600);
}

.page-news .readband__title {
  margin: .35em 0 0;
  font-size: clamp(23px, 3.6vw, 40px);
  line-height: 1.15;
  font-weight: 900;
  color: var(--news-paper-ink);
}

.page-news .readband__lead {
  margin: 16px 0 0;
  max-width: 64ch;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.9;
  color: var(--news-paper-muted);
}

.page-news .readband .media__caption { color: var(--news-paper-muted); }

.page-news .steps {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--news-paper-line);
  border: 1px solid var(--news-paper-line);
}

.page-news .steps__item {
  background: var(--paper-050);
  padding: clamp(18px, 3vw, 28px);
}

.page-news .steps__no {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber-600);
}

.page-news .steps__h {
  margin: 8px 0 0;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 800;
  color: var(--news-paper-ink);
}

.page-news .steps__p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--news-paper-muted);
}

/* 常设专栏 */
.page-news .series__head { margin-bottom: clamp(18px, 3vw, 26px); }

.page-news .series__head h2 {
  margin: 0;
  font-size: clamp(23px, 3.6vw, 38px);
  line-height: 1.15;
  font-weight: 800;
  color: var(--text-100);
}

.page-news .series__head p {
  margin: 10px 0 0;
  max-width: 62ch;
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .series__fig { margin-bottom: clamp(20px, 3vw, 32px); }

.page-news .series__grid {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-news .series__main {
  padding: clamp(18px, 3vw, 28px);
  background: var(--ink-800);
  border: 1px solid var(--line-500);
  border-radius: var(--radius);
}

.page-news .series__main h3,
.page-news .series__card h3 {
  margin: 12px 0 0;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.35;
  font-weight: 800;
  color: var(--text-100);
}

.page-news .series__main p {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .series__fig2 { margin-top: 18px; }

.page-news .series__side {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-news .series__card {
  padding: 4px 0 4px clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--cyan-400);
}

.page-news .series__card h3 { margin-top: 10px; }

.page-news .series__card p {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .series__inline {
  color: var(--cyan-200);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-news .series__inline:hover,
.page-news .series__inline:focus-visible { color: var(--amber-500); }

/* 订阅区块 */
.page-news .follow { background: var(--ink-700); }

.page-news .follow__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-news .follow__title {
  margin: 0;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.2;
  font-weight: 800;
  color: var(--text-100);
}

.page-news .follow__lead {
  margin: 12px 0 0;
  max-width: 56ch;
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-400);
}

.page-news .follow__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-news .follow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-500);
}

.page-news .follow__list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-500);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-400);
}

.page-news .follow__list .mono {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan-400);
}

/* 响应式 */
@media (min-width: 760px) {
  .page-news .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .page-news .masthead__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
  .page-news .readband__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
  }
  .page-news .series__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-news .follow__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-news .feedwrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
  .page-news .side {
    margin-top: 0;
    display: grid;
    grid-template-columns: 18px minmax(0, 1fr);
    gap: 12px;
    position: sticky;
    top: calc(var(--cmd-h) + 20px);
  }
  .page-news .side__strip {
    display: block;
    position: relative;
    border-left: 1px solid var(--line-500);
  }
  .page-news .side__stripword {
    position: absolute;
    top: 0;
    left: 5px;
    writing-mode: vertical-rl;
    font-size: 11px;
    letter-spacing: .32em;
    color: var(--text-400);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .feed__item,
  .page-news .feed__item::before,
  .page-news .filter label,
  .page-news .side__link { transition: none; }
}