/* ============================================================
   专题中心 · 书目式更新流
   ============================================================ */

.page-news {
  background: var(--ink-900);
  color: var(--titanium);
  padding-bottom: 4.5rem;
}

/* ---------- 页头 ---------- */

.page-news .news-masthead {
  padding: 1.5rem 0 2rem;
  border-bottom: 1px solid var(--line-mid);
}

.page-news .news-masthead h1 {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 6vw, 3.35rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--titanium);
}

.page-news .news-masthead .lede {
  margin: 1.15rem 0 0;
  max-width: 46rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--slate);
}

.page-news .news-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.6rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-news .news-masthead__meta li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-news .news-masthead__meta li::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--signal);
}

.page-news .news-masthead__meta li:nth-child(2)::before {
  background: var(--mint);
}

.page-news .news-masthead__meta li:nth-child(3)::before {
  background: var(--slate);
}

/* ---------- 双栏骨架 ---------- */

.page-news .news-board {
  padding-top: 2.5rem;
}

.page-news .news-layout {
  display: grid;
  gap: 2.5rem;
  min-width: 0;
}

.page-news .news-stream {
  min-width: 0;
}

@media (min-width: 1000px) {
  .page-news .news-layout {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: 3.75rem;
    align-items: start;
  }

  .page-news .news-rail {
    position: sticky;
    top: 1.75rem;
  }
}

/* ---------- 左侧栏目索引 ---------- */

.page-news .news-rail {
  min-width: 0;
  border-top: 2px solid var(--signal);
  padding-top: 1.15rem;
}

.page-news .news-rail__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.24em;
  color: var(--signal);
}

.page-news .news-rail__lead {
  margin: 0.45rem 0 1.15rem;
  font-family: var(--font-editorial);
  font-size: 1.25rem;
  line-height: 1.45;
  color: var(--titanium);
}

.page-news .colindex {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .colindex__item {
  margin: 0;
}

.page-news .colindex__link {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: baseline;
  padding: 0.85rem 0.65rem 0.85rem 0;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: inherit;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-news .colindex__link:hover,
.page-news .colindex__link:focus-visible {
  background: var(--ink-700);
  border-bottom-color: var(--signal);
  outline: none;
}

.page-news .colindex__num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--signal);
}

.page-news .colindex__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--titanium);
}

.page-news .colindex__desc {
  display: block;
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--slate);
}

.page-news .news-rail__media {
  margin: 1.75rem 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-700);
}

.page-news .news-rail__media img {
  display: block;
  width: 100%;
  height: 240px;
  object-fit: cover;
}

/* ---------- 右侧内容流 ---------- */

.page-news .stream-block + .stream-block {
  margin-top: 3.5rem;
}

.page-news .stream-head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line-mid);
  margin-bottom: 1.5rem;
}

.page-news .stream-head__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--signal);
}

.page-news .stream-head__title {
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 400;
  font-size: clamp(1.5rem, 4.2vw, 2rem);
  line-height: 1.3;
  color: var(--titanium);
}

.page-news .stream-intro {
  margin: 0 0 1.5rem;
  max-width: 44rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-news .stream-figure {
  margin: 0 0 1.85rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-700);
}

.page-news .stream-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

/* ---------- 栏目分组 ---------- */

.page-news .colgroup + .colgroup {
  margin-top: 2.6rem;
}

.page-news .colgroup__title {
  position: relative;
  margin: 0 0 0.35rem;
  padding-left: 1.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
  color: var(--titanium);
}

.page-news .colgroup__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.6rem;
  height: 2px;
  background: var(--signal);
}

.page-news .colgroup__note {
  margin: 0 0 1.1rem;
  padding-left: 1.35rem;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--slate);
}

.page-news .colgroup__media {
  margin: 0 0 1.25rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  overflow: hidden;
  background: var(--ink-700);
}

.page-news .colgroup__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ---------- 条目 ---------- */

.page-news .entry-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .entry {
  position: relative;
  padding: 1.05rem 0 1.15rem;
  border-top: 1px solid var(--line-soft);
}

.page-news .entry-list > .entry:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-news .entry__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-news .entry__title {
  margin: 0.35rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--titanium);
}

.page-news .entry__desc {
  margin: 0.4rem 0 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--slate);
}

.page-news .entry__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem 0.85rem;
  margin: 0.65rem 0 0;
  font-size: 0.75rem;
  color: var(--slate);
}

.page-news .entry--brief .entry__title {
  font-size: 0.9688rem;
  font-weight: 500;
}

.page-news .entry--brief .entry__desc {
  max-width: 56ch;
}

.page-news .tag {
  display: inline-block;
  padding: 0.18rem 0.6rem;
  border: 1px solid var(--line-mid);
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-news .tag--signal {
  color: var(--signal);
  border-color: var(--signal-soft);
}

.page-news .tag--live {
  color: var(--mint);
  border-color: rgba(31, 185, 138, 0.45);
}

.page-news .entry__time {
  font-family: var(--font-mono);
  font-size: 0.7188rem;
  letter-spacing: 0.04em;
}

@media (min-width: 1000px) {
  .page-news .entry {
    padding-left: 3.75rem;
  }

  .page-news .entry__num {
    position: absolute;
    left: 0;
    top: 1.15rem;
    display: inline;
    font-size: 0.8125rem;
  }
}

/* ---------- 系列专题 ---------- */

.page-news .series-list {
  display: grid;
  gap: 1.15rem;
}

.page-news .series {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-news .series:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-card);
}

.page-news .series__cover {
  border-bottom: 1px solid var(--line-soft);
  background: var(--ink-900);
}

.page-news .series__cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-news .series__body {
  flex: 1;
  padding: 1.25rem 1.35rem 1.5rem;
}

.page-news .series__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7188rem;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.page-news .series__title {
  margin: 0.4rem 0 0;
  font-family: var(--font-editorial);
  font-weight: 400;
  font-size: 1.375rem;
  line-height: 1.35;
  color: var(--titanium);
}

.page-news .series__steps {
  counter-reset: step;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.page-news .series__steps li {
  position: relative;
  padding-left: 2.05rem;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--slate);
  counter-increment: step;
}

.page-news .series__steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--signal-soft);
}

.page-news .series__fit {
  margin: 1.1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line-mid);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-news .series__fit strong {
  color: var(--mint);
  font-weight: 600;
}

@media (min-width: 760px) {
  .page-news .series-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-news .series--lead {
    grid-column: 1 / -1;
    flex-direction: row;
  }

  .page-news .series--lead .series__cover {
    flex: 0 0 44%;
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
  }

  .page-news .series--lead .series__cover img {
    height: 100%;
    aspect-ratio: auto;
    min-height: 260px;
  }
}

/* ---------- 回看与检索 ---------- */

.page-news .archive {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .archive__item {
  margin: 0;
}

.page-news .archive__link {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.5rem;
  align-items: baseline;
  padding: 0.75rem 0.55rem 0.75rem 0;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: inherit;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-news .archive__link:hover,
.page-news .archive__link:focus-visible {
  background: var(--ink-700);
  border-bottom-color: var(--signal);
  outline: none;
}

.page-news .archive__num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-news .archive__label {
  display: block;
  font-size: 0.9375rem;
  color: var(--titanium);
}

.page-news .archive__hint {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--slate);
}

.page-news .archive-note {
  margin: 1.5rem 0 0;
  padding: 1rem 1.15rem;
  border-left: 2px solid var(--mint);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(31, 185, 138, 0.07);
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-news .archive-tail {
  margin: 1rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-news .archive-tail a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-news .archive-tail a:hover,
.page-news .archive-tail a:focus-visible {
  border-bottom-color: var(--signal);
  outline: none;
}

@media (min-width: 700px) {
  .page-news .archive {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 1.75rem;
  }
}

@media (min-width: 700px) {
  .page-news .news-rail__media img {
    height: 300px;
  }
}

@media (min-width: 1000px) {
  .page-news .news-rail__media img {
    height: auto;
    aspect-ratio: 5 / 7;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .series:hover {
    transform: none;
  }
}
</main>