.page-news {
  --news-rail: 200px;
  --news-gap: clamp(22px, 3vw, 44px);
  background: var(--abyss);
  color: var(--white);
  padding-bottom: clamp(56px, 8vw, 110px);
}

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

/* ── 页首 ── */
.page-news .news-masthead {
  padding: clamp(22px, 4vw, 46px) 0 clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--grid);
  background:
    radial-gradient(120% 110% at 86% -30%, rgba(63, 242, 208, 0.13), transparent 62%),
    linear-gradient(180deg, var(--trench), var(--abyss));
}

.page-news .news-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.2vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  max-width: 22ch;
}

.page-news .news-lead {
  margin: 16px 0 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
}

/* ── 编辑精选 ── */
.page-news .news-feature {
  padding-block: clamp(28px, 4.4vw, 58px);
}

.page-news .feature-frame {
  position: relative;
  display: grid;
  overflow: hidden;
  border: 1px solid var(--grid);
  background: linear-gradient(165deg, rgba(11, 44, 63, 0.95), rgba(4, 18, 31, 0.98));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-news .feature-media {
  position: relative;
  margin: 0;
  min-height: 220px;
  background: var(--trench);
}

.page-news .feature-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-news .feature-body {
  padding: clamp(20px, 3.4vw, 42px);
  display: grid;
  gap: 14px;
  align-content: center;
}

.page-news .feature-body h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-news .feature-lead {
  margin: 0;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-news .feature-points {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-news .feature-points li {
  position: relative;
  padding-left: 18px;
  color: var(--white);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-news .feature-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--signal);
}

.page-news .feature-body .btn {
  justify-self: start;
  margin-top: 4px;
}

/* ── 双栏骨架 ── */
.page-news .news-columns {
  display: grid;
  gap: var(--news-gap);
  padding-top: clamp(6px, 1.6vw, 18px);
}

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

.page-news .rail-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--signal);
  text-transform: uppercase;
}

.page-news .rail-list {
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-news .rail-list > li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-news .rail-link {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  width: 214px;
  padding: 12px 14px;
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background: var(--hull);
  color: var(--white);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-news .rail-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--deep-cyan);
  line-height: 1.6;
}

.page-news .rail-name {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
}

.page-news .rail-desc {
  grid-column: 2;
  color: var(--mist);
  font-size: 12.5px;
  line-height: 1.6;
}

.page-news .rail-jump {
  display: inline-block;
  margin: 14px 16px 0 0;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-news .rail-jump:hover,
.page-news .rail-jump:focus-visible {
  border-bottom-color: var(--coral);
}

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

/* ── 通用区块头 ── */
.page-news .news-block + .news-block {
  margin-top: clamp(40px, 6vw, 76px);
}

.page-news .block-head {
  margin-bottom: clamp(16px, 2.4vw, 26px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--grid);
}

.page-news .block-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-news .block-lead {
  margin: 10px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
  max-width: 56ch;
}

/* ── 条目时间线 ── */
.page-news .entry-list {
  display: grid;
  gap: 0;
}

.page-news .entry {
  padding: 20px 0 20px 18px;
  border-left: 1px solid var(--grid);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-news .entry-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-news .entry-num {
  color: var(--deep-cyan);
}

.page-news .entry-time {
  color: var(--mist);
}

.page-news .entry-title {
  margin: 9px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 21px);
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.page-news .entry-sum {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.78;
  max-width: 62ch;
}

.page-news .entry-more {
  margin-top: 10px;
}

.page-news .entry-more summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal);
  transition: color var(--dur) var(--ease);
}

.page-news .entry-more summary::-webkit-details-marker {
  display: none;
}

.page-news .entry-more summary::after {
  content: "+";
  display: inline-block;
  width: 14px;
  text-align: center;
  border: 1px solid var(--signal-dim);
  border-radius: var(--radius);
  line-height: 1.2;
}

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

.page-news .entry-more summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.page-news .entry-more p {
  margin: 10px 0 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.85;
  max-width: 62ch;
}

/* ── 专题说明牌 ── */
.page-news .entry-plate {
  margin: 10px 0 14px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--signal-dim);
  background: linear-gradient(135deg, rgba(27, 174, 151, 0.16), rgba(4, 18, 31, 0.7));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-news .entry-plate--coral {
  border-color: rgba(255, 122, 77, 0.65);
  background: linear-gradient(135deg, rgba(255, 122, 77, 0.15), rgba(4, 18, 31, 0.7));
}

.page-news .entry-plate__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-news .entry-plate__text {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.75;
  max-width: 52ch;
}

.page-news .entry-plate__link {
  display: inline-block;
  margin-top: 12px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid var(--signal-dim);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-news .entry-plate--coral .entry-plate__link {
  color: var(--coral);
  border-bottom-color: rgba(255, 122, 77, 0.6);
}

.page-news .entry-plate__link:hover,
.page-news .entry-plate__link:focus-visible {
  border-bottom-color: currentColor;
}

/* ── 专题系列 ── */
.page-news .series-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-news .series-card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 0 0 22px;
  border-bottom: 2px solid var(--grid);
  transition: border-color var(--dur) var(--ease);
}

.page-news .series-media {
  margin: 0 0 4px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--hull);
  border: 1px solid var(--grid);
}

.page-news .series-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-news .series-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.4;
}

.page-news .series-card p {
  margin: 0;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.78;
}

.page-news .series-order {
  padding-left: 14px;
  border-left: 2px solid var(--signal-dim);
  color: var(--white) !important;
  font-size: 13.5px !important;
}

/* ── 订阅更新 ── */
.page-news .subscribe-panel {
  display: grid;
  gap: 24px;
  padding: clamp(22px, 3.6vw, 44px);
  border: 1px solid var(--grid);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 122, 77, 0.16), transparent 58%),
    var(--trench);
}

.page-news .subscribe-body h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-news .subscribe-body > p {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
  max-width: 58ch;
}

.page-news .subscribe-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-news .subscribe-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.7;
}

.page-news .subscribe-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 7px;
  height: 7px;
  background: var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-news .subscribe-actions {
  display: grid;
  gap: 12px;
  align-content: start;
  justify-items: stretch;
}

.page-news .back-top {
  display: inline-block;
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--grid);
  padding-bottom: 3px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-news .back-top:hover,
.page-news .back-top:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ── 桌面端 ── */
@media (min-width: 860px) {
  .page-news .feature-frame {
    grid-template-columns: 1.15fr 0.95fr;
    align-items: stretch;
  }
}

@media (min-width: 940px) {
  .page-news .news-columns {
    grid-template-columns: var(--news-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-news .rail-inner {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    padding-right: 8px;
  }

  .page-news .rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-news .rail-list > li {
    flex: initial;
  }

  .page-news .rail-link {
    width: 100%;
    min-width: 0;
    padding: 12px 0;
    border: 0;
    border-top: 1px solid var(--grid);
    border-radius: 0;
    background: transparent;
  }

  .page-news .rail-list > li:last-child .rail-link {
    border-bottom: 1px solid var(--grid);
  }

  .page-news .rail-link:hover,
  .page-news .rail-link:focus-visible {
    transform: translateX(6px);
  }

  .page-news .rail-link:hover .rail-num,
  .page-news .rail-link:focus-visible .rail-num {
    color: var(--signal);
  }

  .page-news .entry:hover {
    border-left-color: var(--signal);
    transform: translateX(-4px);
  }

  .page-news .series-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-news .series-card:hover {
    border-bottom-color: var(--signal);
  }

  .page-news .subscribe-panel {
    grid-template-columns: 1.5fr 0.85fr;
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-news {
    --news-rail: 216px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .rail-link,
  .page-news .entry,
  .page-news .series-card,
  .page-news .back-top,
  .page-news .entry-plate__link {
    transition: none;
  }

  .page-news .rail-link:hover,
  .page-news .rail-link:focus-visible,
  .page-news .entry:hover {
    transform: none;
  }
}
<<<END>>>