.page-news {
  --pn-violet: #A99BFF;
  --pn-ink-soft: #4C6070;
  --pn-hair: rgba(221, 231, 236, 0.18);
  --pn-hair-soft: rgba(221, 231, 236, 0.09);
}

/* ---------- 报头 ---------- */
.page-news .pn-masthead {
  padding: 24px 0 6px;
}

.page-news .pn-masthead .breadcrumbs {
  margin: 0 0 20px;
}

.page-news .pn-masthead__grid {
  display: grid;
  gap: 24px;
}

.page-news h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 7.4vw, 52px);
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--cloud);
}

.page-news .pn-masthead__intro {
  max-width: 30em;
  margin: 16px 0 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
}

.page-news .pn-figs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--pn-hair);
}

.page-news .pn-fig {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-news .pn-fig .numeral {
  font-family: var(--font-mono);
  font-size: clamp(22px, 6vw, 30px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--amber);
}

.page-news .pn-fig__cap {
  font-size: 11px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 主体骨架 ---------- */
.page-news .pn-body {
  padding: 28px 0 48px;
}

.page-news .pn-layout {
  display: grid;
  gap: 20px;
}

.page-news .pn-column {
  min-width: 0;
}

/* ---------- 左窄栏 ---------- */
.page-news .pn-rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--pn-hair-soft);
}

.page-news .pn-rail__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-news .pn-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .pn-rail__link {
  display: inline-block;
  padding: 4px 10px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--pn-hair);
  clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-news .pn-rail__link:hover,
.page-news .pn-rail__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-news .pn-rail__cap--period,
.page-news .pn-rail__periods {
  display: none;
}

/* ---------- 图片 ---------- */
.page-news .pn-figure {
  margin: 0 0 20px;
}

.page-news .pn-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
}

.page-news .pn-figure--square img {
  object-fit: cover;
}

/* ---------- 区块 ---------- */
.page-news .pn-section {
  --pn-gap: 18px;
  position: relative;
  margin: 0 0 16px;
  padding: 22px 16px 24px;
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
}

.page-news #sec-summary {
  --pn-gap: 14px;
  padding: 20px 14px 18px;
  background: transparent;
  border-left: 3px solid var(--cyan);
  clip-path: none;
}

.page-news #sec-version {
  --pn-gap: 18px;
  background: var(--teal);
}

.page-news #sec-case {
  --pn-gap: 16px;
  background: var(--wine);
}

.page-news #sec-collect {
  --pn-gap: 14px;
  background: var(--indigo);
}

.page-news #sec-feedback {
  --pn-gap: 12px;
  background:
    linear-gradient(160deg, rgba(169, 155, 255, 0.14), rgba(11, 27, 43, 0) 62%),
    var(--ink);
}

.page-news #sec-sub {
  --pn-gap: 11px;
  background: var(--cloud);
}

.page-news .pn-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 4.8vw, 26px);
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--cloud);
}

.page-news .pn-section__lede {
  max-width: 34em;
  margin: 8px 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 摘要 ---------- */
.page-news .pn-digest {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-news .pn-digest__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 14px;
  border-left: 1px solid var(--pn-hair);
}

.page-news .pn-digest__text {
  flex: 1 1 15em;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--cloud);
}

/* ---------- 条目列表 ---------- */
.page-news .pn-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .pn-item {
  position: relative;
  padding: var(--pn-gap) 0 var(--pn-gap) 14px;
  border-bottom: 1px dashed var(--pn-hair);
}

.page-news .pn-list > .pn-item:last-child {
  border-bottom: 0;
}

.page-news .pn-item--key::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--pn-gap);
  bottom: var(--pn-gap);
  width: 3px;
  background: var(--cyan);
}

.page-news .pn-item__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 7px;
}

.page-news .pn-item__when {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.page-news .pn-item__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--cloud);
}

.page-news .pn-item__desc {
  max-width: 34em;
  margin: 6px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 分类标签 ---------- */
.page-news .pn-tag {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--cyan);
  border: 1px solid currentColor;
  clip-path: polygon(5px 0, 100% 0, 100% calc(100% - 5px), calc(100% - 5px) 100%, 0 100%, 0 5px);
}

.page-news .pn-tag--version { color: var(--cyan); }
.page-news .pn-tag--case { color: var(--amber); }
.page-news .pn-tag--collect { color: var(--rose); }
.page-news .pn-tag--sub { color: var(--cloud); }
.page-news .pn-tag--feedback { color: var(--pn-violet); }

/* ---------- 延伸链接 ---------- */
.page-news .pn-more {
  display: inline-block;
  margin-top: 16px;
  padding-bottom: 2px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 214, 0.35);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-news .pn-more::after {
  content: " →";
}

.page-news .pn-more:hover,
.page-news .pn-more:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 浅色区 ---------- */
.page-news .pn-section--light .pn-section__title {
  color: var(--text-dark);
}

.page-news .pn-section--light .pn-section__lede,
.page-news .pn-section--light .pn-item__when,
.page-news .pn-section--light .pn-item__desc {
  color: var(--pn-ink-soft);
}

.page-news .pn-section--light .pn-item__title {
  color: var(--text-dark);
}

.page-news .pn-section--light .pn-item {
  border-bottom-color: rgba(16, 24, 32, 0.16);
}

.page-news .pn-section--light .pn-item--key::before {
  background: var(--cyan-deep);
}

.page-news .pn-section--light .pn-tag--sub {
  color: var(--cyan-deep);
}

.page-news .pn-section--light .pn-more {
  color: var(--cyan-deep);
  border-bottom-color: rgba(15, 124, 119, 0.4);
}

.page-news .pn-section--light .pn-more:hover,
.page-news .pn-section--light .pn-more:focus-visible {
  border-bottom-color: var(--cyan-deep);
}

/* ---------- 回到顶部 ---------- */
.page-news .pn-top {
  position: fixed;
  right: 14px;
  bottom: 92px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  background: var(--ink);
  border: 1px solid rgba(53, 224, 214, 0.38);
  text-decoration: none;
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-news .pn-top:hover,
.page-news .pn-top:focus-visible {
  border-color: var(--cyan);
}

/* ---------- 中屏以上 ---------- */
@media (min-width: 720px) {
  .page-news .pn-figure--square img {
    max-width: 420px;
  }

  .page-news .pn-section {
    padding: 28px 26px 30px;
  }

  .page-news #sec-summary {
    padding: 24px 22px 22px;
  }
}

@media (min-width: 900px) {
  .page-news .pn-masthead {
    padding-top: 32px;
  }

  .page-news .pn-masthead__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: 44px;
  }

  .page-news .pn-figs {
    padding-top: 20px;
  }

  .page-news .pn-body {
    padding: 38px 0 64px;
  }

  .page-news .pn-layout {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-news .pn-rail {
    position: sticky;
    top: 96px;
    display: block;
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-news .pn-rail__list {
    display: block;
    margin: 10px 0 26px;
  }

  .page-news .pn-rail__link {
    display: block;
    padding: 6px 0 6px 11px;
    border: 0;
    border-left: 2px solid var(--pn-hair);
    clip-path: none;
  }

  .page-news .pn-rail__link:hover,
  .page-news .pn-rail__link:focus-visible {
    border-left-color: var(--cyan);
  }

  .page-news .pn-rail__cap--period,
  .page-news .pn-rail__periods {
    display: block;
  }

  .page-news .pn-rail__periods {
    margin: 10px 0 0;
    padding: 0;
    list-style: none;
  }

  .page-news .pn-rail__periods li + li {
    margin-top: 2px;
  }

  .page-news .pn-rail__periods a {
    display: flex;
    gap: 7px;
    align-items: baseline;
    padding: 3px 0;
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.6;
    color: var(--muted);
    text-decoration: none;
    transition: color var(--dur) var(--ease);
  }

  .page-news .pn-rail__periods a:hover,
  .page-news .pn-rail__periods a:focus-visible {
    color: var(--cyan);
  }

  .page-news .pn-rail__num {
    min-width: 18px;
    font-weight: 700;
    color: var(--amber);
  }

  .page-news .pn-top {
    right: 28px;
    bottom: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .pn-rail__link,
  .page-news .pn-rail__periods a,
  .page-news .pn-more,
  .page-news .pn-top {
    transition: none;
  }
}