.page-news {
  background: var(--color-bg);
  color: var(--color-text);
  --article-pad: clamp(24px, 5vw, 64px);
  --index-size: clamp(60px, 10vw, 132px);
}

.page-news .breadcrumbs {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-top: 24px;
}

/* ===== 页面头部 ===== */
.page-news .news-head {
  display: grid;
  gap: 32px;
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 48px var(--gutter) 64px;
  border-bottom: 2px solid var(--color-line);
}

.page-news .news-head__left .section-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--color-cyan);
}

.page-news .news-head__left .section-kicker::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--color-accent);
  box-shadow: 4px 0 0 var(--color-violet);
}

.page-news .news-head__left h1 {
  font-family: var(--font-sans);
  font-size: clamp(30px, 4.5vw, 54px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 18px 0 0;
  max-width: 12em;
}

.page-news .news-head__right p {
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 48ch;
  margin: 0;
}

.page-news .news-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-news .news-filter .tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid var(--color-line);
  padding: 8px 14px;
  color: var(--color-text);
  background: rgba(10, 25, 47, 0.6);
  transition: border-color var(--transition), background-color var(--transition), color var(--transition);
}

.page-news .news-filter .tag:hover,
.page-news .news-filter .tag:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(0, 255, 157, 0.08);
}

.page-news .news-filter .tag--orange:hover,
.page-news .news-filter .tag--orange:focus-visible {
  border-color: var(--color-orange);
  color: var(--color-orange);
  background: rgba(255, 110, 48, 0.08);
}

/* ===== 文章列表 ===== */
.page-news .news-articles {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 0 var(--gutter);
}

.page-news .news-article {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  padding-top: 64px;
  padding-bottom: 64px;
  border-top: 2px solid var(--color-line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-news .news-article:first-child {
  border-top: none;
}

.page-news .news-article:nth-child(even) {
  background: linear-gradient(180deg, rgba(42, 59, 92, 0.14) 0%, transparent 100%);
}

.page-news .news-article__index {
  font-family: var(--font-mono);
  font-size: var(--index-size);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1px var(--color-line);
  user-select: none;
  opacity: 0.75;
}

.page-news .news-article:nth-child(odd) .news-article__index {
  color: rgba(0, 255, 157, 0.05);
  -webkit-text-stroke-color: var(--color-accent);
  opacity: 0.55;
}

.page-news .news-article__index::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-cyan), var(--color-accent));
  margin-top: 14px;
  opacity: 0.85;
}

.page-news .news-article:nth-child(odd) .news-article__index::after {
  background: linear-gradient(90deg, var(--color-orange), var(--color-violet));
}

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

.page-news .news-article__head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-news .news-article__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-left: 1px solid var(--color-line);
  padding-left: 12px;
}

.page-news .news-article__title {
  font-family: var(--font-sans);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: #fff;
  margin: 0;
  max-width: 20em;
}

.page-news .news-article__desc {
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 60ch;
  margin: 0;
}

/* ===== 文章内容网格 ===== */
.page-news .news-article__grid {
  display: grid;
  gap: 20px;
  margin-top: 12px;
}

.page-news .news-article__img {
  margin: 0;
  background: var(--color-panel);
  border: 2px solid var(--color-line);
  box-shadow: var(--shadow);
}

.page-news .news-article__img img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-news .news-article__list h3 {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-news .news-article__list h3::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.page-news .news-article__list ul {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-news .news-article__list li {
  position: relative;
  padding-left: 24px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text);
}

.page-news .news-article__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  opacity: 0.9;
}

.page-news .news-article:nth-child(odd) .news-article__list li::before {
  background: var(--color-orange);
}

.page-news .news-article__note {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
  border-left: 3px solid var(--color-cyan);
  padding-left: 14px;
  line-height: 1.75;
  margin: 0 0 20px;
}

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

.page-news .news-article__note a:hover,
.page-news .news-article__note a:focus-visible {
  color: var(--color-accent);
}

/* ===== 帮助提示区 ===== */
.page-news .news-help {
  border-top: 2px solid var(--color-line);
  background: linear-gradient(135deg, rgba(0, 255, 157, 0.04) 0%, rgba(138, 43, 226, 0.04) 60%, transparent 100%);
}

.page-news .news-help__inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 56px var(--gutter) 72px;
  display: grid;
  gap: 24px;
  align-items: center;
}

.page-news .news-help h2 {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  margin: 0 0 8px;
}

.page-news .news-help p {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
  margin: 0;
  max-width: 52ch;
}

.page-news .news-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-news .news-help__links .btn {
  font-family: var(--font-sans);
  font-size: 14px;
  text-decoration: none;
  padding: 12px 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-line);
  color: var(--color-text);
  background: transparent;
  transition: border-color var(--transition), color var(--transition), background-color var(--transition);
}

.page-news .news-help__links .btn:hover,
.page-news .news-help__links .btn:focus-visible {
  border-color: var(--color-text);
  color: #fff;
}

.page-news .news-help__links .btn--primary {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: #05201a;
  font-weight: 700;
}

.page-news .news-help__links .btn--primary:hover,
.page-news .news-help__links .btn--primary:focus-visible {
  background: transparent;
  color: var(--color-accent);
}

/* ===== 桌面端 ===== */
@media (min-width: 900px) {
  .page-news .news-head {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: end;
    gap: 64px;
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .page-news .news-head__right {
    justify-self: end;
  }

  .page-news .news-article {
    grid-template-columns: var(--index-size) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 72px);
    padding-top: 96px;
    padding-bottom: 96px;
  }

  .page-news .news-article__index {
    font-size: var(--index-size);
  }

  .page-news .news-article__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-news .news-article__grid--reverse .news-article__img {
    order: 2;
  }

  .page-news .news-article__img {
    position: stickly;
    top: calc(var(--header-h) + 24px);
  }

  .page-news .img-frame--portrait img {
    max-height: 760px;
    object-fit: cover;
    object-position: center top;
  }

  .page-news .news-article__list {
    padding-top: 4px;
  }

  .page-news .news-help__inner {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
    gap: 48px;
    padding-top: 64px;
    padding-bottom: 80px;
  }

  .page-news .news-help__links {
    justify-content: flex-end;
  }
}