.page-news {
  --news-line: rgba(255, 255, 255, .1);
  --news-soft: rgba(255, 255, 255, .72);
  --news-card-bg: rgba(255, 255, 255, .055);
  --news-card-border: rgba(255, 255, 255, .08);
  background-color: var(--bg-deep);
}

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

/* ===== Hero ===== */
.page-news .page-news__hero {
  position: relative;
  padding-top: calc(var(--header-h) + 2rem);
  padding-bottom: 3.5rem;
  background: var(--bg-deep);
  overflow: hidden;
}

.page-news .page-news__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none;
}

.page-news .page-news__hero::after {
  content: "";
  position: absolute;
  top: 18%;
  right: -42px;
  width: 200px;
  height: 200px;
  background: var(--neon);
  opacity: .1;
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  pointer-events: none;
}

.page-news .page-news__hero-inner {
  position: relative;
  border-left: 3px solid var(--neon);
  padding-left: 1.25rem;
}

.page-news .page-news__hero-inner::after {
  content: "";
  display: block;
  width: 44px;
  height: 4px;
  margin-top: 2rem;
  background: var(--orange);
}

.page-news .page-news__eyebrow {
  font-family: var(--font-mono);
  letter-spacing: .12em;
  color: var(--neon);
}

.page-news .page-news__title {
  margin: 1.2rem 0 1.4rem;
  max-width: 18em;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.08;
  color: var(--white);
}

.page-news .page-news__lead {
  max-width: 46em;
  margin: 0;
  color: rgba(255, 255, 255, .78);
  font-size: 1.05rem;
  line-height: 1.8;
}

.page-news .page-news__data {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  max-width: 34rem;
  margin-top: 2.5rem;
}

.page-news .page-news__data-cell {
  padding-left: 1rem;
  border-left: 1px solid rgba(255, 255, 255, .14);
  display: flex;
  flex-direction: column;
  gap: .2rem;
}

.page-news .page-news__data-cell .data-strip__num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  line-height: 1.1;
  color: var(--neon);
}

.page-news .page-news__data-cell .data-strip__label {
  font-size: .82rem;
  color: rgba(255, 255, 255, .6);
}

/* ===== 专题横幅 ===== */
.page-news .page-news__banner {
  padding: 0 0 4.5rem;
  background: var(--bg-deep);
}

.page-news .feature-board {
  position: relative;
  min-height: 340px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  background: var(--bg-ink);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .35);
}

.page-news .feature-board__media {
  position: absolute;
  inset: 0;
}

.page-news .feature-board__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .42;
}

.page-news .feature-board__content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 2rem 1.5rem 2.5rem;
  background: linear-gradient(90deg, rgba(5, 7, 13, .95) 0%, rgba(5, 7, 13, .78) 62%, rgba(5, 7, 13, .35) 100%);
}

.page-news .feature-board__title {
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 4vw, 2.3rem);
  line-height: 1.2;
  margin: .8rem 0 .75rem;
  max-width: 20em;
  color: var(--white);
}

.page-news .feature-board__desc {
  max-width: 42em;
  margin: 0 0 1.5rem;
  color: rgba(255, 255, 255, .78);
  line-height: 1.7;
}

.page-news .tag--orange {
  display: inline-block;
  padding: .28rem .8rem;
  border: 1px solid rgba(255, 106, 0, .45);
  border-radius: 999px;
  background: rgba(255, 106, 0, .16);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  vertical-align: middle;
}

/* ===== 区块标题 ===== */
.page-news .page-news__section-head {
  margin-bottom: 2.5rem;
}

.page-news .page-news__section-title {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 4vw, 2.2rem);
  line-height: 1.2;
  margin: .6rem 0 .5rem;
  color: var(--white);
}

.page-news .page-news__section-desc {
  max-width: 43em;
  margin: 0;
  color: rgba(255, 255, 255, .68);
  line-height: 1.7;
}

/* ===== 时间线过滤 ===== */
.page-news .timeline-filter {
  position: relative;
}

.page-news .filter-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-news .filter-chip {
  display: inline-block;
  margin: 0 .5rem .5rem 0;
  padding: .45rem 1rem;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--muted);
  user-select: none;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-news .filter-radio:hover + .filter-chip {
  color: var(--white);
  border-color: rgba(255, 255, 255, .45);
}

.page-news .filter-radio:focus-visible + .filter-chip {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-news .filter-radio:checked + .filter-chip {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--bg-deep);
  font-weight: 700;
}

.page-news #filter-data:checked ~ .timeline-layout .timeline__item:not(.item--data),
.page-news #filter-func:checked ~ .timeline-layout .timeline__item:not(.item--func),
.page-news #filter-ver:checked ~ .timeline-layout .timeline__item:not(.item--ver) {
  display: none;
}

/* ===== 时间线布局 ===== */
.page-news .timeline-layout {
  display: grid;
  gap: 2.5rem;
  margin-top: 2rem;
}

.page-news .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--orange) 45%, var(--ice) 90%, transparent 100%);
  opacity: .65;
}

.page-news .timeline__item {
  position: relative;
  margin-bottom: 1.5rem;
  padding-left: 3rem;
}

.page-news .timeline__node {
  position: absolute;
  left: 0;
  top: 1rem;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-deep);
  color: var(--neon);
  z-index: 1;
}

.page-news .item--func .timeline__node {
  color: var(--orange);
}

.page-news .item--ver .timeline__node {
  color: var(--ice);
}

/* ===== 更新卡片 ===== */
.page-news .page-news__update-card {
  padding: 1.35rem 1.5rem;
  background: var(--news-card-bg);
  border: 1px solid var(--news-card-border);
  border-radius: var(--radius);
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.page-news .page-news__tag-data,
.page-news .page-news__tag-func,
.page-news .page-news__tag-ver {
  display: inline-block;
  padding: .2rem .6rem;
  border: 1px solid transparent;
  border-radius: 2rem;
  margin-bottom: .7rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
}

.page-news .page-news__tag-data {
  color: var(--neon);
  border-color: rgba(57, 255, 20, .4);
  background: rgba(57, 255, 20, .08);
}

.page-news .page-news__tag-func {
  color: var(--orange);
  border-color: rgba(255, 106, 0, .4);
  background: rgba(255, 106, 0, .08);
}

.page-news .page-news__tag-ver {
  color: var(--ice);
  border-color: rgba(160, 211, 255, .4);
  background: rgba(160, 211, 255, .08);
}

.page-news .page-news__update-title {
  margin: 0 0 .4rem;
  font-size: 1.15rem;
  color: var(--white);
}

.page-news .page-news__update-summary {
  margin: 0;
  font-size: .93rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, .66);
}

/* ===== 时间线侧栏 ===== */
.page-news .page-news__timeline-aside {
  padding: 1.5rem;
  background: rgba(255, 255, 255, .04);
  border: 1px dashed rgba(255, 255, 255, .16);
  border-radius: var(--radius);
  align-self: start;
}

.page-news .page-news__aside-media img {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.page-news .page-news__timeline-aside p {
  margin: 0 0 1rem;
  font-size: .95rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, .7);
}

/* ===== 专题指南 ===== */
.page-news .page-news__guide {
  padding: 4.5rem 0;
  background: var(--bg-cloud);
  color: var(--bg-ink);
}

.page-news .page-news__guide .page-news__section-title {
  color: var(--bg-ink);
}

.page-news .page-news__guide .page-news__section-desc {
  color: rgba(5, 7, 13, .72);
}

.page-news .page-news__guide .page-news__eyebrow {
  color: var(--orange);
}

.page-news .guide-grid {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

.page-news .guide-main__title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  margin: 0 0 .8rem;
  color: var(--bg-ink);
}

.page-news .guide-main__text {
  margin: 0 0 1.5rem;
  line-height: 1.75;
  color: rgba(5, 7, 13, .8);
}

.page-news .page-news__guide-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
}

.page-news .page-news__guide-panel .data-panel__head,
.page-news .page-news__guide-panel .data-panel__row {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  gap: .5rem;
  margin: 0;
  padding: .85rem 1.1rem;
  border-bottom: 1px solid var(--line);
}

.page-news .page-news__guide-panel .data-panel__head {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
  background: #EEF2F8;
  font-weight: 700;
}

.page-news .page-news__guide-panel .data-panel__row:last-child {
  border-bottom: none;
}

.page-news .page-news__guide-panel .data-panel__row span:first-child {
  font-weight: 700;
  color: var(--bg-ink);
}

.page-news .page-news__guide-panel .data-panel__row span:last-child {
  font-family: var(--font-mono);
  color: #1E2A3A;
}

.page-news .guide-details {
  margin-top: 1.5rem;
}

.page-news .guide-details summary {
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  list-style: none;
  padding-bottom: .3rem;
  border-bottom: 2px solid var(--orange);
  font-weight: 700;
  font-size: .95rem;
  color: var(--bg-ink);
}

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

.page-news .guide-details summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--orange);
  font-size: 1rem;
  transition: transform .2s ease;
}

.page-news .guide-details[open] summary::after {
  transform: rotate(45deg);
}

.page-news .guide-details__body {
  margin-top: 1rem;
  padding: 1.2rem 1.3rem;
  border-left: 3px solid var(--orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--white);
  font-size: .95rem;
  line-height: 1.7;
  color: rgba(5, 7, 13, .8);
}

.page-news .guide-details__body p {
  margin: 0 0 .6rem;
}

.page-news .guide-details__body p:last-child {
  margin-bottom: 0;
}

.page-news .page-news__guide .btn--ghost {
  margin-top: 1.5rem;
  border-color: rgba(5, 7, 13, .35);
  color: var(--bg-ink);
}

.page-news .page-news__guide .btn--ghost:hover {
  background: rgba(5, 7, 13, .08);
  border-color: var(--bg-ink);
}

.page-news .guide-media img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 14px 34px rgba(5, 7, 13, .12);
}

/* ===== 优化记录 ===== */
.page-news .page-news__optimize {
  padding: 4.5rem 0;
  background: var(--bg-deep);
}

.page-news .page-news__opt-grid {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

.page-news .page-news__opt-media img {
  width: 100%;
  border-radius: var(--radius);
}

.page-news .opt-list {
  margin-top: 2rem;
}

.page-news .opt-item {
  display: flex;
  gap: 1.1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.page-news .opt-item:first-child {
  padding-top: 0;
}

.page-news .opt-item:last-child {
  border-bottom: none;
}

.page-news .opt-item__index {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .95rem;
  font-weight: 700;
  color: var(--orange);
}

.page-news .opt-item__title {
  margin: 0 0 .35rem;
  font-size: 1.05rem;
  color: var(--white);
}

.page-news .opt-item__text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, .66);
}

.page-news .page-news__opt-note {
  margin: 1.5rem 0 1.25rem;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--neon);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(255, 255, 255, .05);
  font-size: .93rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, .8);
}

/* ===== 订阅与通知 ===== */
.page-news .page-news__subscribe {
  padding: 4rem 0 5rem;
  background: var(--bg-ink);
}

.page-news .subscribe-card {
  position: relative;
  display: grid;
  gap: 2rem;
  padding: 2.2rem 2rem;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, #0E1B30 0%, #132A4C 100%);
  overflow: hidden;
}

.page-news .subscribe-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 220px;
  height: 220px;
  background: var(--neon);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: .1;
  pointer-events: none;
}

.page-news .page-news__subscribe .page-news__section-title {
  color: var(--white);
}

.page-news .page-news__subscribe .page-news__section-desc {
  color: rgba(255, 255, 255, .72);
}

.page-news .subscribe-toggle summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.page-news .subscribe-toggle summary::-webkit-details-marker {
  display: none;
}

.page-news .subscribe-toggle__body {
  margin-top: 1.25rem;
  padding: 1.25rem 1.5rem;
  max-width: 26rem;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .09);
  color: rgba(255, 255, 255, .78);
  font-size: .95rem;
  line-height: 1.7;
}

.page-news .subscribe-toggle__body p {
  margin: 0 0 1rem;
}

.page-news .subscribe-toggle__body .btn {
  margin: 0;
}

.page-news .subscribe-card__note {
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .05);
  align-self: start;
}

.page-news .page-news__sub-note-title {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .9rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-news .page-news__sub-note-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}

.page-news .page-news__sub-note-list li {
  position: relative;
  margin-bottom: .5rem;
  padding-left: 1.3rem;
  font-size: .92rem;
  color: rgba(255, 255, 255, .75);
}

.page-news .page-news__sub-note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 6px;
  height: 6px;
  background: var(--neon);
  transform: rotate(45deg);
}

.page-news .page-news__sub-note-line {
  margin: 0;
  padding-top: .75rem;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-family: var(--font-mono);
  font-size: .82rem;
  color: rgba(255, 255, 255, .55);
}

/* ===== 响应式增强 ===== */
@media (min-width: 720px) {
  .page-news .page-news__data {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 900px) {
  .page-news .guide-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  }
}

@media (min-width: 960px) {
  .page-news .timeline-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
  }

  .page-news .page-news__opt-grid {
    grid-template-columns: 320px minmax(0, 1fr);
  }
}

@media (min-width: 860px) {
  .page-news .subscribe-card {
    grid-template-columns: minmax(0, 1fr) 300px;
    padding: 3rem;
  }
}

@media (min-width: 64rem) {
  .page-news .page-news__hero {
    padding-top: calc(var(--header-h) + 4.5rem);
    padding-bottom: 6rem;
  }

  .page-news .feature-board {
    min-height: 430px;
  }

  .page-news .feature-board__content {
    padding: 3.5rem 3rem;
  }
}

@media (hover: hover) and (pointer: fine) {
  .page-news .page-news__update-card:hover {
    background: rgba(255, 255, 255, .09);
    border-color: rgba(57, 255, 20, .35);
    transform: translateX(6px);
  }
}