.page-news {
  --news-shadow: 0 20px 46px -34px rgba(11, 14, 20, 0.55);
  --news-report: var(--orange);
  --news-observe: var(--blue);
  --news-review: var(--cyan);
  --news-library: var(--neon);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-news .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin: 0 0 6px;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  position: relative;
  margin-top: 6px;
  padding: clamp(20px, 5vw, 44px) 0 clamp(26px, 5vw, 54px);
  border-radius: 0 0 var(--radius-l) var(--radius-l);
  background:
    radial-gradient(110% 82% at 92% -12%, rgba(30, 107, 255, 0.55), transparent 58%),
    radial-gradient(84% 72% at 4% 110%, rgba(255, 90, 31, 0.42), transparent 62%),
    var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.page-news .news-hero .eyebrow {
  color: var(--cyan);
}

.page-news .news-hero__grid {
  display: grid;
  gap: clamp(18px, 4vw, 38px);
  align-items: center;
}

.page-news .news-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.6rem, 8vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 8px 0 16px;
}

.page-news .news-hero__lead {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(0.95rem, 1.6vw, 1.06rem);
  line-height: 1.68;
  color: rgba(247, 250, 255, 0.8);
}

.page-news .news-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-news .news-hero__visual .media-frame {
  box-shadow: 0 30px 60px -40px rgba(0, 0, 0, 0.9);
}

.page-news .news-hero__stats {
  list-style: none;
  margin: clamp(22px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(247, 250, 255, 0.16);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-news .news-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px 16px;
  background: rgba(11, 14, 20, 0.6);
}

.page-news .news-hero__stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.4vw, 1.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-news .news-hero__stat-label {
  font-size: 0.78rem;
  line-height: 1.4;
  color: rgba(247, 250, 255, 0.66);
}

/* ---------- 专题索引 ---------- */
.page-news .topic-board {
  padding: clamp(34px, 6vw, 68px) 0 0;
}

.page-news .topic-board__head {
  max-width: 62ch;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-news .topic-board__head .eyebrow {
  color: var(--blue);
}

.page-news .topic-board__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}

.page-news .topic-board__copy {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-news .topic-board__layout {
  display: grid;
  gap: clamp(18px, 3vw, 34px);
}

.page-news .topic-rail {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px;
  border-radius: var(--radius-m);
  background:
    radial-gradient(120% 100% at 100% 0, rgba(30, 107, 255, 0.28), transparent 62%),
    var(--ink);
  color: var(--paper);
}

.page-news .topic-rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(247, 250, 255, 0.5);
}

.page-news .topic-rail__list,
.page-news .topic-rail__stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
}

.page-news .topic-rail__list {
  overflow-x: auto;
  padding-bottom: 2px;
}

.page-news .topic-rail__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 148px;
  padding: 10px 12px;
  border-radius: var(--radius-s);
  border-left: 3px solid transparent;
  background: rgba(247, 250, 255, 0.07);
  color: var(--paper);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-news .topic-rail__link:hover,
.page-news .topic-rail__link:focus-visible {
  background: rgba(247, 250, 255, 0.16);
}

.page-news .topic-rail__link .data-value {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(247, 250, 255, 0.55);
}

.page-news .topic-rail__link--report {
  border-left-color: var(--news-report);
}

.page-news .topic-rail__link--observe {
  border-left-color: var(--news-observe);
}

.page-news .topic-rail__link--review {
  border-left-color: var(--news-review);
}

.page-news .topic-rail__link--library {
  border-left-color: var(--news-library);
}

.page-news .topic-rail__stages {
  flex-wrap: wrap;
}

.page-news .topic-rail__stage {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--line-light);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: rgba(247, 250, 255, 0.76);
}

.page-news .topic-rail__stage--on {
  background: var(--neon);
  border-color: transparent;
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 研究板列表 ---------- */
.page-news .feed-group + .feed-group {
  margin-top: clamp(24px, 4vw, 42px);
}

.page-news .feed-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-news .feed-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  letter-spacing: -0.01em;
}

.page-news .feed-group__count {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--graphite);
  opacity: 0.64;
}

.page-news .feed-group__list {
  display: grid;
  gap: 12px;
}

.page-news .board-card {
  position: relative;
  padding: clamp(14px, 2.4vw, 22px);
  background: #ffffff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--graphite);
  border-radius: var(--radius-m);
  box-shadow: var(--news-shadow);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-news .board-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 26px 54px -34px rgba(11, 14, 20, 0.5);
}

.page-news .board-card--report {
  border-left-color: var(--news-report);
}

.page-news .board-card--observe {
  border-left-color: var(--news-observe);
}

.page-news .board-card--review {
  border-left-color: var(--news-review);
}

.page-news .board-card--library {
  border-left-color: var(--news-library);
}

.page-news .board-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.page-news .board-card__meta .data-value {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--graphite);
  opacity: 0.68;
}

.page-news .board-card__title {
  margin: 0 0 8px;
  font-size: clamp(1rem, 2.1vw, 1.15rem);
  font-weight: 700;
  line-height: 1.36;
  letter-spacing: -0.005em;
}

.page-news .board-card__excerpt {
  margin: 0 0 12px;
  font-size: 0.88rem;
  line-height: 1.62;
  color: var(--graphite);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-news .board-card__stats {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.page-news .board-card__stats li {
  display: flex;
  align-items: baseline;
  gap: 5px;
  font-size: 0.73rem;
  color: var(--graphite);
}

.page-news .board-card__stats .data-value {
  font-family: var(--font-mono);
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--ink);
}

.page-news .board-card__more {
  border-top: 1px dashed var(--line);
  padding-top: 10px;
}

.page-news .board-card__more summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue);
}

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

.page-news .board-card__more summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1;
}

.page-news .board-card__more[open] summary::after {
  content: "\2212";
}

.page-news .board-card__more p {
  margin: 10px 0 8px;
  font-size: 0.83rem;
  line-height: 1.66;
  color: var(--graphite);
}

.page-news .board-card__link {
  display: inline-block;
  font-size: 0.79rem;
  font-weight: 700;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-news .board-card__link:hover,
.page-news .board-card__link:focus-visible {
  color: var(--ink);
}

/* ---------- 资料库更新 ---------- */
.page-news .library-update {
  margin-top: clamp(34px, 6vw, 72px);
  padding: clamp(26px, 5vw, 58px) 0;
  background:
    radial-gradient(88% 78% at 90% 10%, rgba(94, 231, 255, 0.2), transparent 60%),
    radial-gradient(72% 72% at 4% 92%, rgba(255, 90, 31, 0.18), transparent 62%),
    var(--ink-soft);
  color: var(--paper);
}

.page-news .library-update__grid {
  display: grid;
  gap: clamp(20px, 3.5vw, 40px);
  align-items: center;
}

.page-news .library-update .eyebrow {
  color: var(--cyan);
}

.page-news .library-update h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4.4vw, 2.9rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}

.page-news .library-update__lead {
  margin: 0;
  max-width: 52ch;
  font-size: 0.94rem;
  line-height: 1.72;
  color: rgba(247, 250, 255, 0.78);
}

.page-news .library-update__cols {
  list-style: none;
  margin: 20px 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-news .library-update__col {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--cyan);
}

.page-news .library-update__col strong {
  font-size: 0.9rem;
  font-weight: 700;
}

.page-news .library-update__col span {
  font-size: 0.78rem;
  line-height: 1.5;
  color: rgba(247, 250, 255, 0.62);
}

.page-news .library-update__visual .media-frame {
  box-shadow: 0 30px 60px -42px rgba(0, 0, 0, 0.95);
}

/* ---------- 关注列表 ---------- */
.page-news .watch {
  padding: clamp(34px, 6vw, 72px) 0 0;
}

.page-news .watch__grid {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
  align-items: center;
}

.page-news .watch .eyebrow {
  color: var(--orange);
}

.page-news .watch h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.2vw, 2.7rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}

.page-news .watch__copy p {
  margin: 0;
  max-width: 52ch;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--graphite);
}

.page-news .watch__stats {
  list-style: none;
  margin: 20px 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.page-news .watch__stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 10px;
  border-radius: var(--radius-s);
  background: #ffffff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
}

.page-news .watch__stat:nth-child(2) {
  border-top-color: var(--blue);
}

.page-news .watch__stat:nth-child(3) {
  border-top-color: var(--neon);
}

.page-news .watch__stat .data-value {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  font-weight: 700;
  line-height: 1;
}

.page-news .watch__stat-label {
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--graphite);
}

.page-news .watch__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 专题合集 ---------- */
.page-news .series {
  padding: clamp(34px, 6vw, 72px) 0 0;
}

.page-news .series__head {
  max-width: 62ch;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-news .series__head .eyebrow {
  color: var(--blue);
}

.page-news .series__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4.4vw, 2.9rem);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}

.page-news .series__copy {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-news .series__grid {
  display: grid;
  gap: 14px;
}

.page-news .series__feature {
  grid-column: 1 / -1;
  display: grid;
  gap: 0;
  overflow: hidden;
  border-radius: var(--radius-l);
  background:
    radial-gradient(90% 90% at 92% 8%, rgba(183, 255, 42, 0.16), transparent 60%),
    var(--ink);
  color: var(--paper);
}

.page-news .series__feature-media .media-frame {
  border-radius: 0;
  height: 100%;
}

.page-news .series__feature-media,
.page-news .series__feature-media .media-frame,
.page-news .series__feature-media img {
  min-height: 100%;
}

.page-news .series__feature-body {
  padding: clamp(18px, 3vw, 30px);
}

.page-news .series__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--neon);
  margin-bottom: 8px;
}

.page-news .series__feature-body h3 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  line-height: 1.12;
  margin: 0 0 10px;
}

.page-news .series__feature-body p {
  margin: 0 0 14px;
  font-size: 0.88rem;
  line-height: 1.68;
  color: rgba(247, 250, 255, 0.76);
}

.page-news .series__tags {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-news .series__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  border-radius: var(--radius-m);
  background: #ffffff;
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  box-shadow: var(--news-shadow);
}

.page-news .series__card:nth-of-type(3) {
  border-top-color: var(--orange);
}

.page-news .series__card:nth-of-type(4) {
  border-top-color: var(--neon);
}

.page-news .series__card .series__num {
  color: var(--graphite);
  opacity: 0.6;
  margin-bottom: 0;
}

.page-news .series__card h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.36;
}

.page-news .series__card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--graphite);
}

.page-news .series__card .series__link {
  margin-top: auto;
}

.page-news .series__link {
  align-self: flex-start;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-news .library-update__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-news .news-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .feed-group__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-news .series__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-news .news-hero__grid {
    grid-template-columns: 1.12fr 0.88fr;
  }

  .page-news .library-update__grid {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-news .watch__grid {
    grid-template-columns: 0.88fr 1.12fr;
  }

  .page-news .series__feature {
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }
}

@media (min-width: 980px) {
  .page-news .topic-board__layout {
    grid-template-columns: 214px minmax(0, 1fr);
    align-items: start;
  }

  .page-news .topic-rail {
    position: sticky;
    top: calc(var(--topbar-h) + 18px);
  }

  .page-news .topic-rail__list {
    flex-direction: column;
    overflow: visible;
  }

  .page-news .topic-rail__link {
    min-width: 0;
  }
}

@media (min-width: 1120px) {
  .page-news .series__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .board-card,
  .page-news .topic-rail__link {
    transition: none;
  }

  .page-news .board-card:hover {
    transform: none;
  }
}