.page-news {
  --news-space: clamp(52px, 7vw, 96px);
  --news-text-soft: rgba(244, 233, 212, 0.74);
  --diff-line: rgba(7, 26, 43, 0.16);
  --diff-line-strong: rgba(7, 26, 43, 0.34);
  padding-block-end: clamp(40px, 6vw, 80px);
}

.page-news .breadcrumb {
  padding-block: clamp(18px, 3vw, 28px) 0;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  padding-block: clamp(20px, 3vw, 36px) clamp(28px, 4vw, 52px);
}

.page-news .news-hero__inner {
  display: grid;
  gap: clamp(22px, 3vw, 44px);
  align-items: end;
}

.page-news .news-hero h1 {
  font-family: var(--font-display);
  font-size: var(--step-3);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.005em;
  margin: 0.3em 0 0.55em;
  max-width: 18ch;
}

.page-news .news-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--news-text-soft);
}

.page-news .news-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 38px);
  margin-block-start: clamp(22px, 3vw, 34px);
  padding-block-start: 18px;
  border-top: 1px solid var(--line);
}

.page-news .hs {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-news .hs-num {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--amber);
  line-height: 1;
}

.page-news .hs-txt {
  font-size: var(--step--1);
  color: var(--haze);
  letter-spacing: 0.02em;
}

.page-news .news-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-news .news-hero__media::after {
  content: "";
  position: absolute;
  inset: 8px -8px -8px 8px;
  border-right: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  pointer-events: none;
}

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

/* ---------- 时间轴 ---------- */
.page-news .news-board {
  padding-block: clamp(28px, 4vw, 48px) var(--news-space);
  border-top: 1px solid var(--line);
}

.page-news .news-board__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 24px;
}

.page-news .news-board__head h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.01em;
}

.page-news .news-board__note {
  margin: 0;
  font-size: var(--step--1);
  color: var(--haze);
}

.page-news .filter-strip {
  margin-block-start: clamp(18px, 2.5vw, 28px);
}

.page-news .filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-news .filter-labels {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block-end: 10px;
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: thin;
}

.page-news .filter-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  font-size: var(--step--1);
  letter-spacing: 0.03em;
  color: var(--haze);
  background: transparent;
  cursor: pointer;
  transition: background 0.15s var(--ease), color 0.15s var(--ease),
    border-color 0.15s var(--ease);
}

.page-news .filter-chip:hover {
  border-color: var(--line-strong);
  color: var(--sand);
}

.page-news .filter-chip .mono {
  font-family: var(--font-mono);
  font-size: 0.86em;
  letter-spacing: 0.08em;
  opacity: 0.85;
}

.page-news .filter-input:focus-visible ~ .filter-labels .filter-chip {
  outline: 1px dashed var(--cyan);
  outline-offset: 2px;
}

.page-news #filter-all:checked ~ .filter-labels label[for="filter-all"],
.page-news #filter-rules:checked ~ .filter-labels label[for="filter-rules"],
.page-news #filter-data:checked ~ .filter-labels label[for="filter-data"],
.page-news #filter-product:checked ~ .filter-labels label[for="filter-product"],
.page-news #filter-insight:checked ~ .filter-labels label[for="filter-insight"] {
  background: var(--cyan-soft);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-news #filter-rules:checked ~ .timeline .tl-item:not(.tl-item--rules),
.page-news #filter-data:checked ~ .timeline .tl-item:not(.tl-item--data),
.page-news #filter-product:checked ~ .timeline .tl-item:not(.tl-item--product),
.page-news #filter-insight:checked ~ .timeline .tl-item:not(.tl-item--insight) {
  display: none;
}

.page-news .timeline {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-news .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  grid-template-areas:
    "axis when"
    "axis card";
  column-gap: 14px;
  row-gap: 8px;
  padding-block-end: clamp(24px, 3vw, 38px);
}

.page-news .tl-axis {
  grid-area: axis;
  position: relative;
}

.page-news .tl-axis::before {
  content: "";
  position: absolute;
  top: 14px;
  bottom: -10px;
  left: 50%;
  width: 1px;
  background: var(--line);
  transform: translateX(-50%);
}

.page-news .tl-item:last-child .tl-axis::before {
  bottom: auto;
  height: 16px;
}

.page-news .tl-node {
  position: absolute;
  top: 4px;
  left: 50%;
  width: 10px;
  height: 10px;
  border: 2px solid var(--haze);
  border-radius: 50%;
  background: var(--ink-900);
  transform: translateX(-50%);
}

.page-news .tl-item--rules .tl-node {
  border-color: var(--amber);
}

.page-news .tl-item--data .tl-node {
  border-color: var(--cyan);
}

.page-news .tl-item--product .tl-node {
  border-color: var(--ember);
}

.page-news .tl-item--insight .tl-node {
  border-color: var(--haze);
}

.page-news .tl-when {
  grid-area: when;
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-self: start;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--haze);
  line-height: 1.5;
}

.page-news .tl-batch {
  color: var(--amber);
  letter-spacing: 0.06em;
  text-transform: none;
}

.page-news .tl-card {
  grid-area: card;
  max-width: 620px;
  padding: clamp(16px, 2.2vw, 24px);
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  transition: border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.page-news .tl-card:hover {
  border-color: var(--line-strong);
  background: var(--ink-700);
}

.page-news .tl-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-news .tl-seq {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--haze);
}

.page-news .tl-card h3 {
  margin: 12px 0 8px;
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: 0.01em;
}

.page-news .tl-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.72;
  color: var(--news-text-soft);
}

.page-news .tl-link {
  display: inline-block;
  margin-block-start: 14px;
  font-size: var(--step--1);
  letter-spacing: 0.03em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed rgba(47, 227, 208, 0.45);
  padding-block-end: 2px;
  transition: color 0.15s var(--ease), border-color 0.15s var(--ease);
}

.page-news .tl-link:hover {
  color: var(--amber);
  border-bottom-color: rgba(242, 184, 75, 0.6);
}

/* ---------- 规则版本差异 ---------- */
.page-news .news-diff {
  padding-block: var(--news-space);
  background: var(--sand);
  color: var(--ink-900);
}

.page-news .news-diff .eyebrow {
  color: rgba(7, 26, 43, 0.7);
}

.page-news .diff-head h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  margin: 0.4em 0 0.5em;
  letter-spacing: 0.01em;
}

.page-news .diff-lede {
  margin: 0;
  max-width: 56ch;
  font-size: var(--step-0);
  line-height: 1.75;
  color: rgba(7, 26, 43, 0.78);
}

.page-news .diff-grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-block-start: clamp(24px, 3vw, 38px);
}

.page-news .diff-media {
  margin: 0;
  border: 1px solid var(--diff-line-strong);
  background: rgba(255, 255, 255, 0.45);
}

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

.page-news .news-diff .media-caption {
  padding: 10px 12px;
  border-top: 1px solid var(--diff-line);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: rgba(7, 26, 43, 0.62);
}

.page-news .diff-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--diff-line-strong);
  background: rgba(255, 255, 255, 0.42);
  scrollbar-width: thin;
}

.page-news .diff-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.page-news .diff-table th,
.page-news .diff-table td {
  padding: 13px 14px;
  text-align: start;
  vertical-align: top;
  border-bottom: 1px solid var(--diff-line);
  line-height: 1.6;
}

.page-news .diff-table thead th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(7, 26, 43, 0.62);
  border-bottom: 1px solid var(--diff-line-strong);
  white-space: nowrap;
}

.page-news .diff-table tbody th {
  font-weight: 600;
  white-space: nowrap;
  border-inline-end: 1px solid var(--diff-line);
}

.page-news .diff-table tbody tr:last-child th,
.page-news .diff-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-news .diff-table td.is-new {
  background: rgba(242, 184, 75, 0.26);
  box-shadow: inset 3px 0 0 var(--amber);
  color: var(--ink-900);
}

.page-news .diff-foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(7, 26, 43, 0.7);
}

.page-news .diff-foot a {
  color: var(--ink-900);
  text-decoration: none;
  border-bottom: 1px solid rgba(7, 26, 43, 0.5);
}

.page-news .diff-foot a:hover {
  color: #A24A16;
  border-bottom-color: #A24A16;
}

/* ---------- 数据维护日历 ---------- */
.page-news .news-cal {
  padding-block: var(--news-space);
  border-top: 1px solid var(--line);
}

.page-news .news-cal__inner {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
}

.page-news .cal-main h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  margin: 0.4em 0 0.45em;
  letter-spacing: 0.01em;
}

.page-news .cal-lede {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  max-width: 52ch;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--news-text-soft);
}

.page-news .cal-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  padding: clamp(14px, 2vw, 20px);
  background: var(--ink-800);
  border: 1px solid var(--line);
}

.page-news .cal-week {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px 6px;
  border: 1px solid var(--line-soft);
}

.page-news .cal-w {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--haze);
}

.page-news .cal-bar {
  display: block;
  height: 3px;
  background: var(--cyan);
  opacity: 0.85;
}

.page-news .cal-bar--3 {
  width: 92%;
}

.page-news .cal-bar--2 {
  width: 62%;
  opacity: 0.6;
}

.page-news .cal-bar--1 {
  width: 34%;
  opacity: 0.35;
}

.page-news .cal-phases {
  margin: clamp(22px, 3vw, 30px) 0 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-news .cal-phase {
  padding: 14px 16px;
  background: var(--ink-900);
}

.page-news .cal-phase dt {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--amber);
  margin-block-end: 5px;
}

.page-news .cal-phase dd {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.68;
  color: var(--news-text-soft);
}

.page-news .cal-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-news .news-cal .media-caption {
  padding: 10px 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--haze);
}

/* ---------- 专题观察 ---------- */
.page-news .news-insight {
  padding-block: var(--news-space);
  border-top: 1px solid var(--line);
}

.page-news .insight-head h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  margin: 0.4em 0 0.45em;
  letter-spacing: 0.01em;
}

.page-news .insight-lede {
  margin: 0;
  max-width: 52ch;
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--news-text-soft);
}

.page-news .insight-grid {
  display: grid;
  gap: 1px;
  margin-block-start: clamp(22px, 3vw, 34px);
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-news .insight-card {
  display: flex;
  flex-direction: column;
  background: var(--ink-800);
}

.page-news .insight-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-news .insight-body {
  padding: clamp(18px, 2.4vw, 26px);
}

.page-news .insight-body h3 {
  margin: 12px 0 10px;
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.45;
}

.page-news .insight-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--news-text-soft);
}

/* ---------- 后续路径 ---------- */
.page-news .news-next {
  padding-block: var(--news-space);
  border-top: 1px solid var(--line);
}

.page-news .next-head h2 {
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.01em;
}

.page-news .next-note {
  margin: 10px 0 0;
  font-size: var(--step--1);
  color: var(--haze);
}

.page-news .next-list {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-news .next-item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 18px clamp(14px, 2vw, 22px);
  background: var(--ink-900);
  text-decoration: none;
  color: var(--sand);
  transition: background 0.16s var(--ease);
}

.page-news .next-item a:hover {
  background: var(--ink-700);
}

.page-news .next-idx {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--haze);
}

.page-news .next-txt {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-news .next-txt strong {
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.45;
}

.page-news .next-txt span {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--haze);
}

.page-news .next-arrow {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--cyan);
  transition: transform 0.16s var(--ease), color 0.16s var(--ease);
}

.page-news .next-item a:hover .next-arrow {
  color: var(--amber);
  transform: translateX(4px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-news .insight-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-news .insight-card--feature {
    grid-row: span 2;
  }

  .page-news .cal-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-news .news-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-news .diff-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.5fr);
    align-items: start;
  }

  .page-news .news-cal__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-news .tl-item {
    grid-template-columns: 138px 28px minmax(0, 1fr);
    grid-template-areas: "when axis card";
    column-gap: 0;
    row-gap: 0;
  }

  .page-news .tl-when {
    text-align: end;
    padding-inline-end: 18px;
    padding-block-start: 2px;
  }

  .page-news .tl-card {
    margin-inline-start: 20px;
  }

  .page-news .tl-item--offset .tl-card {
    margin-inline-start: 48px;
    max-width: 700px;
  }
}

@media (min-width: 1100px) {
  .page-news .insight-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr) minmax(0, 0.9fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .tl-card,
  .page-news .filter-chip,
  .page-news .next-item a,
  .page-news .next-arrow {
    transition: none;
  }

  .page-news .next-item a:hover .next-arrow {
    transform: none;
  }
}