/* ===== 文章中心页面专属样式：.page-news ===== */
.page-news {
  --pn-card-gap: 18px;
  --pn-cluster-space: 42px;
  background-color: var(--sb-c-ink);
  color: var(--sb-c-white);
}

/* ---------- 首屏框景：目录型内容地图 ---------- */
.page-news .pn-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 82% 18%, rgba(0, 255, 136, 0.1), transparent 36%),
    linear-gradient(135deg, var(--sb-c-primary) 0%, var(--sb-c-ink) 68%);
  border-bottom: 1px solid var(--sb-c-line);
}

.page-news .pn-hero .sb-container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 30px 18px 44px;
}

.page-news .pn-hero__content {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-news .pn-hero__title {
  margin: 0;
  font-size: 1.7rem;
  line-height: 1.12;
  text-transform: none;
  letter-spacing: 0.01em;
}

.page-news .pn-hero__lead {
  margin: 0;
  color: var(--sb-c-gray);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 52em;
}

.page-news .pn-hero__media {
  margin: 0;
  border-radius: var(--sb-radius);
  overflow: hidden;
  border: 1px solid var(--sb-c-line);
  box-shadow: var(--sb-shadow);
  background-color: var(--sb-c-panel);
}

.page-news .pn-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 220px;
}

.page-news .pn-hero__paths {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  border-top: 1px solid var(--sb-c-line);
  padding-top: 20px;
}

.page-news .pn-path {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 10px;
  background: var(--sb-c-panel);
  border: 1px solid var(--sb-c-line);
  border-left: 3px solid var(--sb-c-neon);
  border-radius: 12px;
  color: var(--sb-c-white);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  transition:
    border-color var(--sb-transition),
    background-color var(--sb-transition),
    transform var(--sb-transition);
}

.page-news .pn-path::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--sb-c-neon);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(0, 255, 136, 0.12);
  transition: box-shadow var(--sb-transition);
  flex: 0 0 auto;
}

.page-news .pn-path:hover,
.page-news .pn-path:focus-visible {
  border-color: var(--sb-c-neon);
  background: rgba(0, 255, 136, 0.08);
}

.page-news .pn-path:hover::before,
.page-news .pn-path:focus-visible::before {
  box-shadow: 0 0 0 6px rgba(0, 255, 136, 0.18);
}

.page-news .pn-path__num {
  font-family: var(--sb-font-data);
  font-size: 0.78rem;
  color: var(--sb-c-neon);
  letter-spacing: 0.04em;
}

.page-news .pn-path__arrow {
  margin-left: auto;
  color: var(--sb-c-muted);
  font-size: 0.9rem;
  transition: color var(--sb-transition);
}

.page-news .pn-path:hover .pn-path__arrow,
.page-news .pn-path:focus-visible .pn-path__arrow {
  color: var(--sb-c-neon);
}

/* ---------- 分类标签 ---------- */
.page-news .pn-cats {
  position: relative;
  overflow: hidden;
  background: var(--sb-c-panel);
}

.page-news .pn-cats::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(115deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(25deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 40px 64px;
  pointer-events: none;
}

.page-news .pn-cats .sb-container {
  position: relative;
  z-index: 1;
}

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

.page-news .pn-cats__note {
  margin: 18px 0 0;
  color: var(--sb-c-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 60em;
}

/* ---------- 最新文章：集群与地图节点 ---------- */
.page-news .pn-articles {
  padding-top: 8px;
}

.page-news .pn-articles__count {
  margin: 16px 0 8px;
  font-family: var(--sb-font-data);
  font-size: 0.82rem;
  color: var(--sb-c-gray);
  letter-spacing: 0.04em;
}

.page-news .pn-cluster {
  position: relative;
  margin-top: var(--pn-cluster-space);
}

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

.page-news .pn-cluster__title {
  margin: 0;
  font-family: var(--sb-font-display);
  font-size: 1.25rem;
  line-height: 1.2;
  color: var(--sb-c-white);
}

.page-news .pn-cluster__count {
  margin-left: auto;
  font-family: var(--sb-font-data);
  color: var(--sb-c-muted);
  font-size: 0.78rem;
}

.page-news .pn-cluster__route {
  display: block;
  width: 100%;
  height: 10px;
  margin: 8px 0 14px;
  color: var(--sb-c-neon);
}

.page-news .pn-cluster__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--pn-card-gap);
}

/* ---------- 文章卡片 ---------- */
.page-news .pn-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--sb-c-panel);
  border: 1px solid var(--sb-c-line);
  border-radius: var(--sb-radius);
  padding: 16px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
  transition:
    border-color var(--sb-transition),
    box-shadow var(--sb-transition),
    transform var(--sb-transition);
}

.page-news .pn-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 44px;
  background: linear-gradient(135deg, rgba(0, 255, 136, 0.18), transparent 60%);
  clip-path: polygon(0 0, 100% 0, 100% 52%, 0 100%);
  pointer-events: none;
}

.page-news .pn-card:hover,
.page-news .pn-card:focus-within {
  border-color: rgba(0, 255, 136, 0.65);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.34);
  transform: translateY(-2px);
}

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

.page-news .pn-card__index {
  font-family: var(--sb-font-data);
  font-size: 0.82rem;
  color: var(--sb-c-muted);
}

.page-news .pn-card__media {
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--sb-c-line);
  background-color: var(--sb-c-ink);
}

.page-news .pn-card__img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  height: auto;
}

.page-news .pn-card__body {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-news .pn-card__title {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.5;
  font-weight: 700;
  color: var(--sb-c-white);
  letter-spacing: 0.01em;
}

.page-news .pn-card__title a {
  color: inherit;
  text-decoration: none;
}

.page-news .pn-card__title a:hover,
.page-news .pn-card__title a:focus-visible {
  color: var(--sb-c-neon);
}

.page-news .pn-card__text {
  margin: 0;
  color: var(--sb-c-gray);
  font-size: 0.88rem;
  line-height: 1.68;
}

.page-news .pn-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--sb-c-line);
}

.page-news .pn-card__time {
  font-family: var(--sb-font-data);
  font-size: 0.76rem;
  color: var(--sb-c-muted);
}

.page-news .pn-card__read {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--sb-c-neon);
  white-space: nowrap;
}

/* ---------- 专题系列 ---------- */
.page-news .pn-series {
  border-top: 1px solid var(--sb-c-line);
}

.page-news .pn-series__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.page-news .pn-series__main {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  padding: 26px 22px;
  border: 1px solid var(--sb-c-line);
  border-radius: var(--sb-radius);
  background:
    radial-gradient(circle at 72% 20%, rgba(0, 255, 136, 0.1), transparent 46%),
    linear-gradient(118deg, var(--sb-c-primary) 0%, var(--sb-c-ink) 78%);
  overflow: hidden;
  box-shadow: var(--sb-shadow);
}

.page-news .pn-series__main::after {
  content: "360°";
  position: absolute;
  right: -8px;
  bottom: -16px;
  font-family: var(--sb-font-display);
  font-size: 3.8rem;
  color: rgba(0, 255, 136, 0.14);
  transform: skewX(var(--sb-skew));
  pointer-events: none;
}

.page-news .pn-series__main-title {
  margin: 0;
  font-family: var(--sb-font-display);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--sb-c-white);
}

.page-news .pn-series__main-text {
  margin: 0;
  max-width: 36em;
  color: var(--sb-c-gray);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-news .pn-series__list {
  display: flex;
  flex-direction: column;
  border-left: 1px dashed var(--sb-c-line);
  padding-left: 20px;
  gap: 18px;
}

.page-news .pn-series__item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 14px 14px 14px 0;
  border-bottom: 1px solid var(--sb-c-line);
}

.page-news .pn-series__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 22px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--sb-c-ink);
  border: 2px solid var(--sb-c-neon);
}

.page-news .pn-series__num {
  font-family: var(--sb-font-data);
  font-size: 0.82rem;
  color: var(--sb-c-neon);
  padding-top: 3px;
}

.page-news .pn-series__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-news .pn-series__title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--sb-c-white);
}

.page-news .pn-series__text {
  margin: 0;
  color: var(--sb-c-gray);
  font-size: 0.86rem;
  line-height: 1.65;
}

.page-news .pn-series__link {
  color: var(--sb-c-neon);
  font-size: 0.84rem;
  font-weight: 600;
  text-decoration: none;
  width: fit-content;
}

.page-news .pn-series__link:hover,
.page-news .pn-series__link:focus-visible {
  color: var(--sb-c-white);
}

/* ---------- 平板：中等断点 ---------- */
@media (min-width: 768px) {
  .page-news .pn-hero__paths {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-news .pn-cluster__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--pn-card-gap);
  }

  .page-news .pn-card--lead,
  .page-news .pn-card--sub {
    grid-column: auto;
  }

  .page-news .pn-card__img {
    max-height: 220px;
  }

  .page-news .pn-series__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 24px;
  }
}

/* ---------- 桌面：非对称对角线动势 ---------- */
@media (min-width: 1024px) {
  .page-news .pn-hero .sb-container {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    grid-template-areas:
      "content media"
      "paths media";
    gap: 28px 48px;
    padding: 56px 24px 84px;
    align-items: stretch;
  }

  .page-news .pn-hero__content {
    grid-area: content;
    justify-content: center;
  }

  .page-news .pn-hero__media {
    grid-area: media;
    align-self: stretch;
  }

  .page-news .pn-hero__paths {
    grid-area: paths;
    align-self: end;
    padding-top: 18px;
  }

  .page-news .pn-hero__title {
    font-size: 2.6rem;
    line-height: 1.08;
  }

  .page-news .pn-hero__lead {
    font-size: 1rem;
  }

  .page-news .pn-cats__list {
    gap: 16px;
  }

  .page-news .pn-cluster__grid {
    grid-template-columns: repeat(12, 1fr);
    align-items: stretch;
  }

  .page-news .pn-card--lead {
    grid-column: span 7;
  }

  .page-news .pn-card--sub {
    grid-column: span 5;
  }

  .page-news .pn-cluster__route {
    height: 12px;
  }

  .page-news .pn-series__main {
    padding: 32px 28px;
  }

  .page-news .pn-series__main-title {
    font-size: 1.8rem;
  }
}

/* ---------- 弱动效保障 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-news .pn-path,
  .page-news .pn-card,
  .page-news .pn-card__title a,
  .page-news .pn-series__link,
  .page-news .pn-path__arrow {
    transition-duration: 0.01ms;
  }
}