.page-news {
  --news-on-paper: rgba(11, 22, 34, .74);
  background: var(--ink-900);
  color: var(--white-soft);
}

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

/* ---------- 面包屑 ---------- */
.page-news .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist-200);
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-news .breadcrumbs a {
  color: var(--mist-200);
  text-decoration: none;
}

.page-news .breadcrumbs a:hover {
  color: var(--glow-amber);
}

.page-news .breadcrumbs__current {
  color: var(--white-soft);
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  padding-block: clamp(38px, 6vw, 84px) clamp(34px, 5vw, 64px);
}

.page-news .news-hero__grid {
  display: grid;
  gap: 32px;
  align-items: end;
}

.page-news .news-hero__head .eyebrow {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--celadon);
}

.page-news h1 {
  margin: 0 0 20px;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.6rem, 9vw, 5.4rem);
  line-height: .98;
  letter-spacing: .04em;
}

.page-news .lede {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
  line-height: 1.75;
  color: var(--mist-200);
}

.page-news .news-hero__stats {
  margin: 0;
  display: grid;
  border-top: 2px solid var(--ink-500);
}

.page-news .news-hero__stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--ink-700);
}

.page-news .news-hero__stats dt {
  font-size: 14px;
  color: var(--mist-200);
}

.page-news .news-hero__stats dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: .02em;
  color: var(--glow-amber);
}

/* ---------- 主体框架 ---------- */
.page-news .news-body {
  display: grid;
  gap: 34px;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-news .news-feed {
  display: grid;
  gap: clamp(48px, 7vw, 88px);
  min-width: 0;
}

/* ---------- 章节索引 ---------- */
.page-news .toc-rail {
  position: static;
  align-self: start;
  border-top: 2px solid var(--ink-500);
  padding-top: 16px;
}

.page-news .toc-rail__label {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist-200);
}

.page-news .toc-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.page-news .toc-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 6px 12px;
  border: 1px solid var(--ink-500);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--mist-200);
  text-decoration: none;
  transition: border-color .2s ease, color .2s ease;
}

.page-news .toc-rail__link:hover,
.page-news .toc-rail__link.is-current {
  color: var(--glow-amber);
  border-color: var(--glow-amber);
}

.page-news .toc-rail__num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--celadon);
}

/* ---------- 通用章节头 ---------- */
.page-news .section-head {
  max-width: 62ch;
}

.page-news .section-head .eyebrow {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--celadon);
}

.page-news .section-title {
  margin: 0 0 12px;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.5rem, 2.4vw, 2.25rem);
  line-height: 1.16;
  letter-spacing: .04em;
}

.page-news .section-intro {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist-200);
}

.page-news .section-rule {
  height: 2px;
  margin: 24px 0 32px;
  background: var(--ink-500);
}

.page-news .news-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ---------- 置顶公告 ---------- */
.page-news .news-notice {
  margin-bottom: clamp(6px, 1.5vw, 14px);
}

.page-news .notice-card {
  background: var(--paper-100);
  color: var(--ink-900);
  border: 2px solid var(--ink-900);
  box-shadow: var(--hard-shadow);
  overflow: hidden;
}

.page-news .notice-card__banner {
  margin: 0;
  border-bottom: 2px solid var(--ink-900);
}

.page-news .notice-card__body {
  display: grid;
  gap: 14px;
  padding: clamp(22px, 3vw, 42px);
}

.page-news .notice-card__title {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.4rem, 2.6vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: .02em;
}

.page-news .notice-card__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--news-on-paper);
}

/* ---------- 迭代条目 ---------- */
.page-news .feed {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-news .feed__item {
  display: grid;
  gap: 12px;
  padding: clamp(18px, 2.4vw, 28px);
  border: 2px solid var(--ink-500);
  background: var(--ink-700);
  transition: transform .2s ease, border-color .2s ease;
}

.page-news .feed__item:hover {
  transform: translateY(-2px);
  border-color: var(--glow-amber);
}

.page-news .feed__figure {
  margin: 0 0 4px;
  border: 1px solid var(--ink-500);
}

.page-news .feed__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.page-news .feed__num {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--celadon);
}

.page-news .feed__time {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist-200);
}

.page-news .feed__title {
  margin: 0;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  font-weight: 700;
  line-height: 1.45;
}

.page-news .feed__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist-200);
}

/* ---------- 资料库补录 ---------- */
.page-news .news-library {
  padding: clamp(24px, 3.6vw, 46px);
  background: var(--paper-100);
  color: var(--ink-900);
  border: 2px solid var(--ink-900);
  box-shadow: var(--hard-shadow);
}

.page-news .news-library .eyebrow,
.page-news .news-index .eyebrow {
  color: var(--clay-600);
}

.page-news .news-library .section-intro,
.page-news .news-index .section-intro {
  color: var(--news-on-paper);
}

.page-news .library__figure {
  margin: 26px 0 28px;
  border: 2px solid var(--ink-900);
}

.page-news .batch {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-news .batch__item {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px;
  background: var(--paper-300);
  border: 2px solid var(--ink-900);
}

.page-news .batch__when {
  margin: 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--clay-600);
}

.page-news .batch__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
}

.page-news .batch__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--news-on-paper);
}

/* ---------- 版本公告 ---------- */
.page-news .versions__figure {
  margin: 26px 0 0;
  border: 2px solid var(--ink-500);
}

.page-news .verlist {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 2px solid var(--ink-500);
}

.page-news .verlist__item {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ink-700);
}

.page-news .verlist__key {
  margin: 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--glow-amber);
}

.page-news .verlist__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
}

.page-news .verlist__text {
  margin: 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist-200);
}

/* ---------- 分类回溯 ---------- */
.page-news .news-index {
  padding: clamp(24px, 3.6vw, 46px);
  background: var(--paper-100);
  color: var(--ink-900);
  border: 2px solid var(--ink-900);
  box-shadow: var(--hard-shadow);
}

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

.page-news .filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 4px 0 24px;
}

.page-news .filter-row .tag {
  cursor: pointer;
  user-select: none;
  padding: 6px 14px;
  font-size: 13px;
  letter-spacing: .04em;
  border: 2px solid var(--ink-900);
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink-900);
  transition: background .2s ease, color .2s ease;
}

.page-news .filter-row .tag:hover {
  background: var(--paper-300);
}

.page-news #f-all:checked ~ .filter-row label[for="f-all"],
.page-news #f-iter:checked ~ .filter-row label[for="f-iter"],
.page-news #f-lib:checked ~ .filter-row label[for="f-lib"],
.page-news #f-list:checked ~ .filter-row label[for="f-list"],
.page-news #f-ver:checked ~ .filter-row label[for="f-ver"] {
  background: var(--ink-900);
  color: var(--paper-100);
}

.page-news #f-iter:checked ~ .log .log__item:not([data-cat="iter"]),
.page-news #f-lib:checked ~ .log .log__item:not([data-cat="lib"]),
.page-news #f-list:checked ~ .log .log__item:not([data-cat="list"]),
.page-news #f-ver:checked ~ .log .log__item:not([data-cat="ver"]) {
  display: none;
}

.page-news .log {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-news .log__item {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  border: 2px solid var(--ink-900);
  background: rgba(255, 255, 255, .5);
  transition: transform .2s ease, border-color .2s ease;
}

.page-news .log__item:hover {
  transform: translateY(-2px);
  border-color: var(--clay-600);
}

.page-news .log__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.page-news .log__dot {
  width: 9px;
  height: 9px;
  flex: none;
  border-radius: 50%;
}

.page-news .log__item[data-cat="iter"] .log__dot {
  background: var(--paper-300);
  border: 1px solid var(--ink-900);
}

.page-news .log__item[data-cat="lib"] .log__dot {
  background: var(--celadon);
}

.page-news .log__item[data-cat="list"] .log__dot {
  background: var(--ink-500);
}

.page-news .log__item[data-cat="ver"] .log__dot {
  background: var(--signal-orange);
}

.page-news .log__cat {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--news-on-paper);
}

.page-news .log__time {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--clay-600);
}

.page-news .log__title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
}

.page-news .log__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--news-on-paper);
}

/* ---------- 时间线索 ---------- */
.page-news .recap {
  margin-top: 34px;
  padding: 22px;
  background: var(--paper-300);
  border: 2px solid var(--ink-900);
}

.page-news .recap__title {
  margin: 0 0 16px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
}

.page-news .recap__list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-news .recap__row {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-news .recap__row dt {
  flex: none;
  min-width: 62px;
  font-size: 13px;
  color: var(--clay-600);
}

.page-news .recap__row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--news-on-paper);
}

/* ---------- 更新提醒 ---------- */
.page-news .subscribe {
  display: grid;
  gap: 24px;
  margin-top: 34px;
  padding: clamp(22px, 3vw, 34px);
  background: var(--ink-900);
  color: var(--white-soft);
  border: 2px solid var(--ink-900);
  box-shadow: var(--hard-shadow);
}

.page-news .subscribe__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
}

.page-news .subscribe__text {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-200);
}

.page-news .subscribe__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-200);
}

.page-news .subscribe__key {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--celadon);
}

.page-news .subscribe__val {
  margin: 0 0 14px;
  font-size: clamp(15px, 2vw, 19px);
  color: var(--white-soft);
  word-break: break-all;
}

.page-news .subscribe .copy-btn {
  border-color: var(--ink-500);
  color: var(--glow-amber);
}

/* ---------- 复制按钮 ---------- */
.page-news .copy-btn {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  padding: 5px 10px;
  border: 1px solid var(--ink-500);
  border-radius: var(--radius);
  background: transparent;
  color: var(--mist-200);
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease;
}

.page-news .copy-btn:hover {
  border-color: var(--glow-amber);
  color: var(--glow-amber);
}

.page-news .copy-btn.is-done {
  border-color: var(--celadon);
  color: var(--celadon);
}

.page-news .news-index .copy-btn {
  border-color: var(--ink-900);
  color: var(--ink-900);
}

.page-news .news-index .copy-btn:hover {
  border-color: var(--clay-600);
  color: var(--clay-600);
}

/* ---------- 返回顶部 ---------- */
.page-news .to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 40;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 2px solid var(--ink-500);
  border-radius: var(--radius);
  background: var(--ink-700);
  color: var(--glow-amber);
  cursor: pointer;
}

.page-news .to-top:hover {
  border-color: var(--glow-amber);
}

.page-news .to-top__icon {
  display: block;
  font-size: 18px;
  line-height: 1;
}

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

  .page-news .recap__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 32px;
  }
}

@media (min-width: 820px) {
  .page-news .log__item {
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 24px;
    align-items: start;
  }

  .page-news .log__head,
  .page-news .log__title,
  .page-news .log__text {
    grid-column: 1;
  }

  .page-news .log__item > .copy-btn {
    grid-column: 2;
    grid-row: 1 / -1;
    align-self: center;
  }

  .page-news .subscribe {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 40px;
  }
}

@media (min-width: 860px) {
  .page-news .verlist__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-news .news-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    gap: clamp(40px, 6vw, 80px);
  }
}

@media (min-width: 980px) {
  .page-news .news-body {
    grid-template-columns: 186px minmax(0, 1fr);
    column-gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }

  .page-news .toc-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    border-top: 0;
    border-left: 2px solid var(--ink-500);
    padding: 0 0 0 16px;
  }

  .page-news .toc-rail__list {
    display: grid;
    gap: 12px;
    overflow-x: visible;
  }

  .page-news .toc-rail__link {
    border: 0;
    padding: 0;
    white-space: normal;
  }
}

@media (max-width: 520px) {
  .page-news .feed__meta {
    gap: 8px;
  }

  .page-news .feed__time {
    margin-left: 0;
  }

  .page-news .log__time {
    margin-left: 0;
  }
}