.page-news {
  --jn-rail-w: 268px;
  --jn-hair: rgba(30, 74, 63, 0.55);
  background: var(--bg);
  color: var(--ink);
  overflow-x: clip;
}

/* ===== 面包屑 ===== */
.page-news .jn-crumbwrap {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-news .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-news .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-news .crumbs a:hover,
.page-news .crumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-news .crumbs [aria-current] {
  color: var(--ink);
}

/* ===== 首屏 ===== */
.page-news .jn-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 5.5vw, 68px);
  border-bottom: 1px solid var(--line);
}

.page-news .jn-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(90deg, var(--jn-hair) 1px, transparent 1px),
    linear-gradient(180deg, var(--jn-hair) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 84%);
  pointer-events: none;
}

.page-news .jn-hero__inner {
  position: relative;
}

.page-news .jn-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(46px, 10.5vw, 116px);
  line-height: 0.94;
  letter-spacing: -0.025em;
  color: var(--white);
}

.page-news .jn-hero__lead {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--rule);
}

.page-news .jn-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-news .jn-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-news .jn-hero__meta li::before {
  content: "";
  flex: none;
  align-self: center;
  width: 5px;
  height: 5px;
  background: var(--cyan);
}

.page-news .jn-hero__meta li:nth-child(2)::before {
  background: var(--orange);
}

/* ===== 通用章节 ===== */
.page-news .section {
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-news .section-head {
  max-width: 760px;
  margin-bottom: clamp(24px, 3.5vw, 42px);
}

.page-news .section-head__index {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-news .section-head__title {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-news .section-head__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ===== 本期焦点 ===== */
.page-news .jn-focus__grid {
  display: grid;
  gap: 22px;
}

.page-news .jn-focus__cards {
  display: grid;
  gap: 22px;
}

.page-news .jn-flag {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px 24px 26px 30px;
  background: var(--card);
  border-left: 3px solid var(--cyan);
}

.page-news .jn-flag:nth-child(2) {
  border-left-color: var(--orange);
}

.page-news .jn-flag__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 12px;
}

.page-news .jn-flag__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-news .jn-flag__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rule);
}

.page-news .jn-flag .btn--text {
  align-self: flex-start;
  margin-top: auto;
}

.page-news .jn-focus__figure {
  margin: 0;
}

.page-news .jn-focus__figure .figure__caption {
  color: var(--muted);
}

/* ===== 专题系列 ===== */
.page-news .jn-series__grid {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-news .jn-series__item {
  display: grid;
  gap: 8px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.page-news .jn-series__no {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-news .jn-series__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 2.8vw, 30px);
  line-height: 1.2;
  color: var(--ink);
}

.page-news .jn-series__desc {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rule);
}

.page-news .jn-series__cadence {
  margin: 4px 0 0;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.page-news .jn-series__foot {
  display: grid;
  gap: 24px;
  align-items: end;
}

.page-news .jn-series__figure {
  margin: 0;
}

.page-news .jn-series__note p {
  margin: 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-news .jn-series__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
}

.page-news .jn-series__note a:hover {
  border-bottom-color: var(--cyan);
}

/* ===== 文章列表 ===== */
.page-news .jn-layout {
  display: grid;
  gap: 30px;
  min-width: 0;
}

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

.page-news .jn-rail__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-news .jn-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-news .filter__btn {
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-news .filter__btn:hover {
  border-color: var(--cyan);
  color: var(--ink);
}

.page-news .filter__btn[aria-pressed="true"],
.page-news .filter__btn.is-active {
  background: var(--cyan-dim);
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-news .jn-rail__count {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-news .filter__count {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-news .jn-rail__figure {
  margin: 24px 0 0;
}

.page-news .jn-rail__figure .figure__caption {
  color: var(--muted);
}

.page-news .jn-stream {
  min-width: 0;
  border-top: 1px solid var(--line);
}

.page-news .jn-entry {
  padding: 22px 2px 24px;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}

.page-news .jn-entry:hover,
.page-news .jn-entry:focus-within {
  background: rgba(30, 74, 63, 0.18);
}

.page-news .jn-entry[hidden] {
  display: none;
}

.page-news .jn-entry__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 0 0 10px;
  font-size: 12px;
}

.page-news .jn-entry__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.32;
  letter-spacing: -0.008em;
  color: var(--ink);
}

.page-news .jn-entry:hover .jn-entry__title {
  color: var(--white);
}

.page-news .jn-entry__body {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rule);
}

/* ===== 方法与版本记录 ===== */
.page-news .jn-versions__grid {
  display: grid;
  gap: 30px;
}

.page-news .jn-log {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: jnlog;
}

.page-news .jn-log__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.page-news .jn-log__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-news .jn-log__idx {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-news .jn-log__ver {
  margin: 0 0 6px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--orange);
}

.page-news .jn-log__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rule);
}

.page-news .jn-versions__figure {
  margin: 0;
}

.page-news .jn-versions__figure .figure__caption {
  color: var(--muted);
}

/* ===== 选题与线索 ===== */
.page-news .jn-tips__grid {
  display: grid;
  gap: 22px;
}

.page-news .jn-tips__card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px 24px;
  background: var(--card);
  border-top: 2px solid var(--cyan);
}

.page-news .jn-tips__card:nth-child(2) {
  border-top-color: var(--orange);
}

.page-news .jn-tips__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.3;
  color: var(--ink);
}

.page-news .jn-tips__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--rule);
}

.page-news .jn-tips__card .btn {
  align-self: flex-start;
  margin-top: auto;
}

/* ===== 响应式 ===== */
@media (min-width: 760px) {
  .page-news .jn-series__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
    border-top: 0;
  }

  .page-news .jn-series__item {
    border-top: 1px solid var(--line);
  }

  .page-news .jn-focus__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .jn-tips__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .jn-series__foot {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 40px;
  }
}

@media (min-width: 1024px) {
  .page-news .jn-focus__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 32px;
    align-items: start;
  }

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

  .page-news .jn-layout {
    grid-template-columns: var(--jn-rail-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-news .jn-rail {
    position: sticky;
    top: calc(var(--hdr-h) + 24px);
  }

  .page-news .jn-versions__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 48px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .filter__btn,
  .page-news .jn-entry,
  .page-news .crumbs a {
    transition: none;
  }
}