.page-news {
  --rail-w: 196px;
  --sticky-top: 96px;
  --item-color: var(--moss);
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-news .mast {
  position: relative;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 150% at 92% -20%, rgb(43 240 196 / .13) 0%, rgb(43 240 196 / 0) 58%),
    linear-gradient(180deg, var(--ink) 0%, var(--pine) 100%);
}

.page-news .mast::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0%, rgb(43 240 196 / 0) 44%, rgb(255 139 61 / .55) 100%);
}

.page-news .mast__inner {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(28px, 5vw, 56px) clamp(28px, 5vw, 52px);
}

.page-news .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  line-height: 1.5;
  color: var(--moss);
}

.page-news .crumbs__list > li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--glass);
}

.page-news .crumbs__a {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-news .crumbs__a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan-40);
}

.page-news .mast__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-news .mast__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-news .mast__accent {
  color: var(--cyan);
}

.page-news .mast__lede {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.7;
  color: var(--moss);
}

.page-news .mast__side {
  padding: 18px 20px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass-40);
}

.page-news .mast__side-h {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-news .mast__stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 14px;
  padding: 10px 0;
  border-top: 1px solid var(--line-soft);
}

.page-news .mast__k {
  font-size: 13px;
  color: var(--moss);
}

.page-news .mast__v {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-news .mast__v--sm {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--mist);
  opacity: .82;
}

/* ---------- 版面主体 ---------- */
.page-news .desk {
  padding-block: clamp(28px, 5vw, 64px) clamp(40px, 7vw, 88px);
}

.page-news .desk__inner {
  display: grid;
  gap: 28px;
}

/* ---------- 左栏索引 ---------- */
.page-news .rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-news .rail__list {
  display: flex;
  gap: 2px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-news .rail__list::-webkit-scrollbar {
  display: none;
}

.page-news .rail__link {
  display: block;
  padding: 8px 12px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--moss);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-news .rail__link:hover {
  color: var(--mist);
  background: var(--cyan-08);
}

.page-news .rail__link[aria-current="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-news .rail__scale {
  display: none;
}

.page-news .rail__ask {
  display: inline-block;
  margin-top: 18px;
  padding-left: 12px;
  border-left: 2px solid var(--orange-45);
  font-size: 12px;
  line-height: 1.6;
  color: var(--moss);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-news .rail__ask:hover {
  color: var(--orange);
  border-left-color: var(--orange);
}

/* ---------- 置顶头条 ---------- */
.page-news .lead {
  padding-bottom: clamp(24px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--sticky-top) + 12px);
}

.page-news .lead__media {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--char);
}

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

.page-news .lead__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin: 18px 0 10px;
}

.page-news .lead__cat {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink);
  background: var(--cyan);
}

.page-news .lead__when {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--orange);
}

.page-news .lead__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  line-height: 1.22;
  letter-spacing: .03em;
  color: var(--mist);
}

.page-news .lead__text {
  margin: 0 0 12px;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--moss);
}

.page-news .lead__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 章节 ---------- */
.page-news .block {
  padding-block: clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--sticky-top) + 12px);
}

.page-news .block:last-child {
  border-bottom: 0;
}

.page-news .block__head {
  margin-bottom: clamp(16px, 2.5vw, 26px);
}

.page-news .block__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  line-height: 1.2;
  letter-spacing: .05em;
  color: var(--mist);
}

.page-news .block__title::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 2px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--cyan);
}

.page-news .block__sub {
  margin: 0;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 条目流 ---------- */
.page-news .feed {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-news .feed__item {
  position: relative;
  padding: 16px 0 16px 18px;
  border-top: 1px solid var(--line);
}

.page-news .feed__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  background: var(--item-color);
  opacity: .8;
}

.page-news .feed__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 14px;
  margin-bottom: 7px;
}

.page-news .feed__cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--item-color);
}

.page-news .feed__when {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--moss);
  opacity: .8;
}

.page-news .feed__title {
  margin: 0 0 7px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--mist);
}

.page-news .feed__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--moss);
}

.page-news .feed__text a,
.page-news .cadence__p a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-40);
  transition: border-color .2s var(--ease);
}

.page-news .feed__text a:hover,
.page-news .cadence__p a:hover {
  border-bottom-color: var(--cyan);
}

.page-news .feed__thumb {
  margin-bottom: 14px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--char);
}

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

/* 栏目色 */
.page-news #versions .feed__item { --item-color: var(--cyan); }
.page-news #topics .feed__item { --item-color: var(--blue); }
.page-news #observations .feed__item { --item-color: var(--paper); }
.page-news #notes .feed__item { --item-color: var(--moss); }

/* ---------- 更新节奏 ---------- */
.page-news .cadence {
  display: grid;
  gap: 20px;
}

.page-news .cadence__row {
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}

.page-news .cadence__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-news .cadence__h {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--mist);
}

.page-news .cadence__p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--moss);
}

.page-news .cadence__panel {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass-40);
}

.page-news .cadence__panel-h {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .05em;
  color: var(--mist);
}

.page-news .cadence__opts {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-news .cadence__opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  font-size: 14px;
  color: var(--mist);
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-news .cadence__opt:hover {
  background: var(--cyan-08);
}

.page-news .cadence__opt:has(input:checked) {
  border-left-color: var(--cyan);
  background: var(--cyan-08);
}

.page-news .cadence__opt input {
  width: 15px;
  height: 15px;
  accent-color: var(--cyan);
  flex: none;
}

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

.page-news .cadence__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--moss);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-news .feed--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 36px);
    align-items: start;
  }

  .page-news .feed__item--wide {
    grid-column: 1 / -1;
  }

  .page-news .feed__item {
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .page-news .feed__item::before {
    top: 18px;
    bottom: 18px;
  }
}

@media (min-width: 900px) {
  .page-news .mast__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, .85fr);
    align-items: end;
  }

  .page-news .desk__inner {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-news .rail {
    position: sticky;
    top: var(--sticky-top);
    align-self: start;
  }

  .page-news .rail__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-news .rail__link {
    padding: 9px 12px;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

  .page-news .rail__link[aria-current="true"] {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
    background: var(--cyan-08);
  }

  .page-news .rail__scale {
    display: flex;
    flex-direction: column;
    gap: 7px;
    margin-top: 22px;
    padding-left: 13px;
    border-left: 1px solid var(--line);
  }

  .page-news .rail__tick {
    display: block;
    width: 9px;
    height: 1px;
    background: var(--line);
  }

  .page-news .rail__tick:nth-child(3n) {
    width: 16px;
    background: var(--cyan-40);
  }

  .page-news .rail__ask {
    display: block;
    margin-top: 26px;
  }
}

@media (min-width: 1024px) {
  .page-news .cadence {
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
    gap: clamp(24px, 4vw, 48px);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .rail__link,
  .page-news .cadence__opt,
  .page-news .crumbs__a,
  .page-news .rail__ask {
    transition: none;
  }
}