.page-news {
  --up-hair: 1px solid var(--line-soft);
  --up-ease: 140ms ease;
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */

.page-news .up-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(18px, 4vw, 40px) 0 clamp(18px, 3vw, 30px);
}

.page-news .up-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -34%;
  right: -8%;
  width: min(700px, 82vw);
  height: 128%;
  background: linear-gradient(118deg,
      rgba(0, 229, 255, 0.14) 0%,
      rgba(122, 92, 255, 0.11) 46%,
      rgba(10, 14, 20, 0) 74%);
  clip-path: polygon(20% 0, 100% 10%, 100% 100%, 0 86%);
  pointer-events: none;
}

.page-news .up-hero::after {
  content: "";
  position: absolute;
  left: var(--gut);
  top: 24%;
  width: 3px;
  height: clamp(48px, 9vw, 96px);
  background: linear-gradient(180deg, var(--cyan), var(--violet));
  pointer-events: none;
}

.page-news .up-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 78px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-news .up-hero .lead {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

.page-news .up-hero__facts {
  list-style: none;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-news .up-hero__facts li {
  background: var(--ink);
  padding: 14px 16px 16px;
}

.page-news .up-fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-news .up-fact__label {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 通栏氛围图 ---------- */

.page-news .up-banner-wrap {
  margin-top: clamp(10px, 2vw, 22px);
}

.page-news .up-banner {
  margin: 0;
  overflow: hidden;
  background: linear-gradient(135deg, var(--deep-2), var(--ink));
  clip-path: polygon(20px 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%, 0 20px);
}

.page-news .up-banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 主体骨架 ---------- */

.page-news .up-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
  margin-top: clamp(30px, 5vw, 56px);
}

.page-news .up-main {
  min-width: 0;
}

/* ---------- 快速定位条 ---------- */

.page-news .up-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 18px;
  margin-bottom: clamp(24px, 4vw, 40px);
  border-bottom: var(--up-hair);
}

.page-news .up-jump__link {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: color var(--up-ease), border-color var(--up-ease), background-color var(--up-ease);
}

.page-news .up-jump__link:hover {
  color: var(--cyan);
  border-color: var(--cyan);
  background: var(--cyan-dim);
}

.page-news .up-jump__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  color: var(--cyan);
}

/* ---------- 区块通用 ---------- */

.page-news .up-section {
  margin-top: clamp(38px, 6vw, 68px);
}

.page-news .up-section:first-of-type {
  margin-top: 0;
}

.page-news .up-section h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-news .up-section > .lead {
  margin: 14px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-news .up-section .prose p {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 查阅节奏 ---------- */

.page-news .up-cadence {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border-top: var(--up-hair);
  border-bottom: var(--up-hair);
}

.page-news .up-cadence li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--deep);
}

.page-news .up-cadence__freq {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-news .up-cadence__who {
  font-family: var(--font-serif);
  font-size: 15px;
  color: var(--sand);
}

.page-news .up-cadence__txt {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 版本条目列表 ---------- */

.page-news .up-entries {
  margin-top: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--line);
}

.page-news .up-entry {
  border-bottom: var(--up-hair);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-news .up-entry__head {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  grid-template-areas:
    "no ver"
    "no title"
    "no tag";
  align-items: baseline;
  column-gap: 12px;
  row-gap: 6px;
  padding: 14px 12px 14px 6px;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--up-ease), box-shadow var(--up-ease);
}

.page-news .up-entry__head::-webkit-details-marker {
  display: none;
}

.page-news .up-entry__head:hover {
  background: var(--deep);
}

.page-news .up-entry__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-news .up-entry[open] > .up-entry__head {
  box-shadow: inset 2px 0 0 var(--cyan);
  background: linear-gradient(90deg, rgba(0, 229, 255, 0.07), rgba(0, 229, 255, 0) 64%);
}

.page-news .up-entry__no {
  grid-area: no;
  align-self: start;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-news .up-entry__ver {
  grid-area: ver;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--cyan);
}

.page-news .up-entry__title {
  grid-area: title;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--fog);
}

.page-news .up-entry__tag {
  grid-area: tag;
  justify-self: start;
  align-self: center;
}

.page-news .up-entry__body {
  padding: 4px 14px 20px 56px;
}

.page-news .up-entry__body p {
  margin: 0;
  max-width: 38em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-news .up-entry__meta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: var(--up-hair);
}

.page-news .up-entry__meta dt {
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sand);
}

.page-news .up-entry__meta dd {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 阶段性回顾 ---------- */

.page-news .up-recap {
  margin: 18px 0;
  padding: 16px 18px;
  border-left: 2px solid var(--violet);
  background: linear-gradient(90deg, rgba(122, 92, 255, 0.13), rgba(122, 92, 255, 0) 74%);
}

.page-news .up-recap__lead {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--sand);
}

.page-news .up-recap p:last-child {
  margin: 9px 0 0;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fog);
}

/* ---------- 专题系列 ---------- */

.page-news .up-series {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-news .up-series__card {
  display: flex;
  flex-direction: column;
  background: var(--deep);
  border: var(--up-hair);
  padding-bottom: 20px;
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  transition: background-color var(--up-ease), border-color var(--up-ease), transform var(--up-ease);
}

.page-news .up-series__card:hover {
  background: var(--deep-2);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-news .up-series__figure {
  margin: 0 0 16px;
  overflow: hidden;
  background: linear-gradient(140deg, var(--deep-2), var(--ink));
}

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

.page-news .up-series__body {
  padding: 0 18px;
}

.page-news .up-series__tag {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--sand);
}

.page-news .up-series__body h3 {
  margin: 7px 0 9px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.35;
  color: var(--fog);
}

.page-news .up-series__body p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--muted);
}

.page-news .up-series__body .up-series__meta {
  margin-bottom: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-soft);
}

/* ---------- 维护窗口时间轴 ---------- */

.page-news .up-track {
  list-style: none;
  position: relative;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0 0 0 26px;
  display: grid;
  gap: clamp(20px, 3vw, 28px);
}

.page-news .up-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--violet) 62%, var(--warn) 100%);
}

.page-news .up-track__node {
  position: relative;
}

.page-news .up-track__node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
}

.page-news .up-track__node--warn {
  padding: 14px 16px;
  border: 1px solid rgba(255, 179, 71, 0.42);
  background: rgba(255, 179, 71, 0.05);
}

.page-news .up-track__node--warn::before {
  border-color: var(--warn);
}

.page-news .up-track__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-news .up-track__title {
  margin: 5px 0 7px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  line-height: 1.35;
  color: var(--fog);
}

.page-news .up-track__node p {
  margin: 0;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

.page-news .up-window__figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
  overflow: hidden;
  background: linear-gradient(120deg, var(--deep), var(--ink));
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.page-news .up-window__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 差异说明与回溯 ---------- */

.page-news .up-diff {
  margin-top: clamp(18px, 3vw, 28px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 34px);
}

.page-news .up-diff__text p {
  margin: 0 0 14px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-news .up-diff__text p:first-child {
  color: var(--fog);
}

.page-news .up-diff__links {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: var(--up-hair);
  border-bottom: var(--up-hair);
}

.page-news .up-diff__links li + li {
  border-top: var(--up-hair);
}

.page-news .up-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 4px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--fog);
  text-decoration: none;
  transition: color var(--up-ease), padding-left var(--up-ease);
}

.page-news .up-link::before {
  content: "";
  flex: none;
  width: 18px;
  height: 1px;
  background: var(--cyan);
  transition: width var(--up-ease);
}

.page-news .up-link:hover {
  color: var(--cyan);
  padding-left: 10px;
}

.page-news .up-link:hover::before {
  width: 26px;
}

.page-news .up-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  color: var(--cyan);
}

.page-news .up-link--inline {
  display: inline-flex;
  padding: 0;
  gap: 6px;
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-news .up-link--inline::before {
  width: 12px;
}

.page-news .up-link--inline:hover {
  padding-left: 0;
}

.page-news .up-diff__figure {
  margin: 0;
  overflow: hidden;
  background: linear-gradient(150deg, var(--deep-2), var(--ink));
  clip-path: polygon(18px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 18px);
}

.page-news .up-diff__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 右侧变更说明栏 ---------- */

.page-news .up-rail {
  padding: 18px 16px 20px;
  background: var(--deep);
  border: var(--up-hair);
  border-top: 2px solid var(--cyan);
}

.page-news .up-rail__title {
  margin: 0;
  padding-bottom: 11px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border-bottom: var(--up-hair);
}

.page-news .up-rail__hint {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-news .up-rail__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-news .up-rail__list li {
  display: grid;
  gap: 3px;
  padding-left: 12px;
  border-left: 1px solid var(--graphite);
}

.page-news .up-rail__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-soft);
}

.page-news .up-rail__txt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-news .up-rail__note {
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 179, 71, 0.42);
  background: rgba(255, 179, 71, 0.06);
}

.page-news .up-rail__note p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.68;
  color: var(--warn);
}

.page-news .up-rail__btn {
  display: block;
  margin-top: 16px;
  text-align: center;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-news .up-cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-news .up-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-news .up-entry__meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 28px;
  }
}

@media (min-width: 760px) {
  .page-news .up-series {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-news .up-entry__head {
    grid-template-columns: 46px 92px minmax(0, 1fr) auto;
    grid-template-areas: "no ver title tag";
    align-items: center;
    column-gap: 16px;
    row-gap: 0;
    padding: 16px 14px 16px 6px;
  }

  .page-news .up-entry__no {
    align-self: center;
    padding-top: 0;
    font-size: 13px;
  }

  .page-news .up-entry__title {
    font-size: 15.5px;
  }

  .page-news .up-entry__tag {
    justify-self: end;
    align-self: center;
    white-space: nowrap;
  }

  .page-news .up-entry__body {
    padding: 2px 24px 24px 176px;
  }

  .page-news .up-diff {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-news .up-layout {
    grid-template-columns: minmax(0, 1fr) 296px;
    align-items: start;
  }

  .page-news .up-rail {
    position: sticky;
    top: calc(var(--header-h) + 16px);
    max-height: calc(100vh - var(--header-h) - 32px);
    overflow-y: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .up-jump__link,
  .page-news .up-entry__head,
  .page-news .up-series__card,
  .page-news .up-link {
    transition: none;
  }

  .page-news .up-series__card:hover {
    transform: none;
  }

  .page-news .up-link:hover {
    padding-left: 4px;
  }
}