.page-news {
  --news-measure: 62ch;
}

/* ---------- 页头 ---------- */
.page-news .breadcrumbs {
  margin-top: clamp(16px, 3vw, 30px);
}

.page-news .news-head {
  max-width: 880px;
  padding-top: clamp(22px, 4.5vw, 44px);
  padding-bottom: clamp(28px, 5vw, 56px);
  display: grid;
  gap: 16px;
}

.page-news .news-head h1 {
  margin: 0;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-news .news-head .lede {
  margin: 0;
  max-width: 56ch;
}

.page-news .news-head-note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  max-width: 56ch;
  color: var(--slate);
  font-size: 14px;
  line-height: 1.75;
}

.page-news .news-head-note .mono {
  color: var(--cyan);
  font-size: 14px;
}

/* ---------- 本周专题头条 ---------- */
.page-news .news-headline {
  position: relative;
  overflow: hidden;
  background: var(--night);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-news .news-headline::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -8%;
  width: min(560px, 64%);
  height: 170%;
  background: linear-gradient(180deg, rgba(43, 232, 198, 0.13), rgba(43, 232, 198, 0));
  transform: rotate(16deg);
  pointer-events: none;
}

.page-news .headline-grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-news .headline-copy {
  display: grid;
  gap: 16px;
}

.page-news .headline-copy h2 {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.16;
  letter-spacing: -0.02em;
}

.page-news .headline-copy > p {
  margin: 0;
  max-width: 52ch;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.78;
}

.page-news .headline-points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-news .headline-points li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist);
}

.page-news .headline-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 9px;
  height: 2px;
  background: var(--orange);
}

.page-news .headline-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--deep);
  box-shadow: var(--shadow-soft);
}

.page-news .headline-media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-news .media-caption {
  display: block;
  padding: 10px 14px;
  color: var(--slate);
  font-size: 12.5px;
  line-height: 1.6;
  border-top: 1px solid var(--line);
}

/* ---------- 分类研究板 ---------- */
.page-news .news-tabs {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  align-items: start;
}

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

.page-news .news-tablist {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-news .news-tablist::-webkit-scrollbar {
  display: none;
}

.page-news .news-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: transparent;
  color: var(--slate);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-news .news-tab .mono {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan-dim);
}

.page-news .news-tab:hover {
  color: var(--mist);
  border-color: var(--cyan-dim);
}

.page-news .news-tab[aria-selected="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--deep);
  font-weight: 700;
}

.page-news .news-tab[aria-selected="true"] .mono {
  color: var(--deep);
  opacity: .72;
}

.page-news .news-tab:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

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

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

.page-news .news-panel > * + * {
  margin-top: clamp(16px, 2.6vw, 26px);
}

.page-news .panel-lead {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  color: var(--mist);
  font-size: 15px;
  line-height: 1.78;
}

.page-news .panel-lead a,
.page-news .panel-foot a,
.page-news .series-foot a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-news .panel-foot {
  margin: 20px 0 0;
  color: var(--slate);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 长列表 ---------- */
.page-news .note-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-news .note-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2.5vw, 26px);
  padding: clamp(16px, 2.6vw, 24px) 0;
  border-bottom: 1px solid var(--line);
}

.page-news .note-index {
  padding-top: 5px;
  min-width: 2.2ch;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan-dim);
}

.page-news .note-body {
  min-width: 0;
}

.page-news .note-body h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--mist);
  transition: color .2s ease;
}

.page-news .note-body p {
  margin: 0;
  max-width: 64ch;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.72;
}

.page-news .note-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--cyan-dim);
}

.page-news .note-item:hover .note-body h3 {
  color: var(--cyan);
}

/* 可展开条目 */
.page-news .note-body summary {
  display: block;
  position: relative;
  padding-right: 34px;
  cursor: pointer;
  list-style: none;
}

.page-news .note-body summary::-webkit-details-marker {
  display: none;
}

.page-news .note-body summary::after {
  content: "+";
  position: absolute;
  top: 0;
  right: 4px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-news .note-body[open] summary::after {
  content: "–";
}

.page-news .note-body[open] summary h3 {
  color: var(--cyan);
}

.page-news .note-more {
  margin-top: 14px;
  padding-left: 14px;
  border-left: 1px solid var(--cyan-dim);
}

.page-news .note-more p + p {
  margin-top: 10px;
}

/* ---------- 面板内图片 ---------- */
.page-news .local-media,
.page-news .version-media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--deep);
}

.page-news .local-media img,
.page-news .version-media img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 专题系列 ---------- */
.page-news .series-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-news .series-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--deep);
}

.page-news .series-media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-news .series-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-news .series-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-bottom: 1px solid var(--line);
}

.page-news .series-dot {
  width: 9px;
  height: 9px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, .14);
}

.page-news .series-meta {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--cyan-dim);
}

.page-news .series-body h3 {
  margin: 0 0 6px;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
  color: var(--mist);
}

.page-news .series-body p {
  margin: 0;
  max-width: 58ch;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.7;
}

.page-news .series-foot {
  margin: 24px 0 0;
  color: var(--slate);
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 线索与投稿 ---------- */
.page-news .submit-board {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(24px, 4vw, 40px);
}

.page-news .submit-copy {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-news .submit-copy h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.24;
}

.page-news .submit-copy p {
  margin: 0;
  max-width: 46ch;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.78;
}

.page-news .submit-copy .btn {
  justify-self: start;
}

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

.page-news .submit-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-news .submit-steps li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-news .submit-steps .mono {
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-news .submit-steps h3 {
  margin: 0 0 4px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--mist);
}

.page-news .submit-steps p {
  margin: 0;
  color: var(--slate);
  font-size: 14px;
  line-height: 1.72;
}

/* ---------- 断点 ---------- */
@media (min-width: 900px) {
  .page-news .news-tabs {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(28px, 5vw, 60px);
  }

  .page-news .news-rail {
    position: sticky;
    top: calc(var(--header-space) + 12px);
  }

  .page-news .news-tablist {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-news .news-tab {
    justify-content: flex-start;
    padding: 12px 16px;
  }
}

@media (min-width: 920px) {
  .page-news .headline-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
  }

  .page-news .series-grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  }

  .page-news .submit-board {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (max-width: 520px) {
  .page-news .note-index {
    display: none;
  }

  .page-news .note-item {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-news .headline-points li,
  .page-news .note-body p {
    font-size: 14.5px;
  }

  .page-news .news-head-note {
    font-size: 13.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .news-tab,
  .page-news .note-body h3 {
    transition: none;
  }
}