.page-news {
  --news-gap: clamp(20px, 3vw, 36px);
  --news-line: rgba(59, 58, 54, .14);
  --news-deep-line: rgba(200, 193, 178, .22);
  padding-bottom: clamp(40px, 6vw, 88px);
}

/* ---------- 面包屑 ---------- */
.page-news .og-breadcrumb {
  margin-top: 18px;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-news .news-hero {
  display: grid;
  gap: var(--news-gap);
  padding: clamp(26px, 4.5vw, 60px) 0 clamp(24px, 4vw, 46px);
}

.page-news .news-hero__eyebrow {
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--ember);
  margin: 0 0 14px;
  text-transform: uppercase;
}

.page-news .news-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 84px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 11ch;
}

.page-news .news-hero__desc {
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.15vw, 17px);
  line-height: 1.78;
  color: var(--graphite);
  margin: 0 0 16px;
  max-width: 34em;
}

.page-news .news-hero__meta {
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--graphite);
  margin: 0;
  padding-left: 12px;
  border-left: 3px solid var(--mist);
}

.page-news .news-hero__ledger {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(18px, 2.4vw, 26px);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-news .news-hero__ledger-title {
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--mist);
  margin: 0 0 12px;
}

.page-news .news-ledger {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .news-ledger__row {
  display: grid;
  grid-template-columns: 3.2em minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px dashed var(--news-deep-line);
}

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

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

.page-news .news-ledger__name {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--paper-lift);
}

.page-news .news-ledger__meta {
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 系列封面示意 ---------- */
.page-news .news-overview {
  margin: 0 0 clamp(38px, 6vw, 76px);
}

.page-news .news-overview img,
.page-news .news-figure img,
.page-news .news-rhythm__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--paper-lift);
  border-top: 4px solid var(--ember);
}

.page-news .news-overview figcaption,
.page-news .news-figure figcaption,
.page-news .news-rhythm__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .01em;
  line-height: 1.7;
  color: var(--graphite);
  margin-top: 10px;
}

/* ---------- 系列切换 ---------- */
.page-news .news-series {
  padding-bottom: clamp(10px, 2vw, 20px);
}

.page-news .news-series__head {
  max-width: 40em;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-news h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-news .news-series__head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
  max-width: 36em;
}

.page-news .news-seg-wrap {
  position: sticky;
  top: var(--sticky-top);
  z-index: 5;
  background: var(--arena);
  padding: 6px;
  margin-bottom: clamp(22px, 3.4vw, 36px);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-news .news-seg {
  display: flex;
  align-items: stretch;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-news .news-seg__btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 15px;
  border: 0;
  border-left: 1px solid var(--news-deep-line);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background .14s var(--ease), color .14s var(--ease);
}

.page-news .news-seg__btn:first-child {
  border-left: 0;
}

.page-news .news-seg__btn:hover {
  color: var(--paper-lift);
}

.page-news .news-seg__btn[aria-selected="true"] {
  background: var(--volt);
  color: var(--ink);
  border-left-color: transparent;
}

.page-news .news-seg__btn:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 2px;
}

.page-news .news-seg__num {
  font-size: 12px;
  letter-spacing: .04em;
  opacity: .8;
}

/* ---------- 系列面板 ---------- */
.page-news .news-panel {
  padding: 0 0 clamp(30px, 5vw, 56px);
}

.page-news .news-panel__lead {
  max-width: 38em;
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding-left: 14px;
  border-left: 3px solid var(--ember);
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-news .news-figure {
  margin: 0 0 clamp(22px, 3vw, 34px);
}

/* ---------- 时间线条目 ---------- */
.page-news .news-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-news .news-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  border-left: 1px dashed var(--mist);
}

.page-news .news-timeline__item {
  position: relative;
  padding: 12px 0 14px;
  border-bottom: 1px solid var(--news-line);
}

.page-news .news-timeline__item:nth-child(5n) {
  margin-bottom: 32px;
  border-bottom-color: transparent;
}

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

.page-news .news-timeline__node {
  position: absolute;
  left: -30px;
  top: 19px;
  width: 10px;
  height: 10px;
  background: var(--mist);
  transition: background .14s var(--ease), transform .14s var(--ease);
}

.page-news .news-timeline__item:hover .news-timeline__node {
  background: var(--ember);
  transform: scale(1.45);
}

.page-news .news-timeline__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ember);
  margin-bottom: 5px;
}

.page-news .news-timeline__title {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
  margin: 0 0 6px;
}

.page-news .news-timeline__text {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--graphite);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 最近更新 ---------- */
.page-news .news-recent {
  background: var(--arena);
  color: var(--paper);
  padding: clamp(28px, 4.5vw, 56px) clamp(20px, 4vw, 48px);
  margin: clamp(28px, 5vw, 56px) 0;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-news .news-recent h2 {
  color: var(--paper-lift);
  margin-bottom: 8px;
}

.page-news .news-recent__note {
  margin: 0 0 clamp(16px, 2.6vw, 26px);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 34em;
}

.page-news .news-recent__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-news .news-recent__item {
  display: grid;
  gap: 5px;
  padding: 14px 0;
}

.page-news .news-recent__item + .news-recent__item {
  border-top: 1px dashed var(--news-deep-line);
}

.page-news .news-recent__tag {
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--volt);
}

.page-news .news-recent__title {
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper-lift);
}

.page-news .news-recent__cue {
  font-size: 12px;
  color: var(--mist);
}

/* ---------- 阅读结构 ---------- */
.page-news .news-read {
  padding: clamp(30px, 5vw, 62px) 0 clamp(26px, 4vw, 48px);
}

.page-news .news-read__intro {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-news .news-read__grid {
  display: grid;
  gap: clamp(14px, 2.2vw, 22px);
  margin: clamp(20px, 3vw, 30px) 0 0;
}

.page-news .news-read__step {
  background: var(--paper-lift);
  padding: 20px 20px 22px;
  border-left: 4px solid var(--ember);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-news .news-read__num {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--graphite);
  margin-bottom: 9px;
}

.page-news .news-read__step h3 {
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
  margin: 0 0 8px;
}

.page-news .news-read__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--graphite);
}

.page-news .news-read__length {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .015em;
  color: var(--graphite);
}

/* ---------- 更新节奏 ---------- */
.page-news .news-rhythm {
  background: var(--paper-lift);
  padding: clamp(26px, 4vw, 46px);
  margin-bottom: clamp(34px, 5.5vw, 68px);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-news .news-rhythm__intro {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  max-width: 36em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-news .news-rhythm__list {
  list-style: none;
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-news .news-rhythm__item {
  display: grid;
  gap: 6px;
  padding: 14px 0 0;
  border-top: 1px dashed var(--mist);
}

.page-news .news-rhythm__item p {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-news .news-rhythm__num {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ember);
}

.page-news .news-rhythm__figure {
  margin: 0;
}

.page-news .news-rhythm__figure img {
  border-top-color: var(--arena);
}

/* ---------- 兜底指引 ---------- */
.page-news .news-fallback {
  padding-top: clamp(6px, 1.4vw, 16px);
}

.page-news .news-fallback::before {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  background: var(--ember);
  transform: rotate(-8deg);
  margin: 0 0 22px 4px;
}

.page-news .news-fallback p {
  margin: 0 0 22px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-news .news-fallback__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-news .news-recent__item {
    grid-template-columns: minmax(0, 210px) minmax(0, 1fr) minmax(0, 170px);
    align-items: baseline;
    gap: 18px;
    padding: 15px 0;
  }

  .page-news .news-read__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-news .news-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(32px, 6vw, 88px);
    align-items: start;
  }

  .page-news .news-hero__ledger {
    margin-top: clamp(40px, 7vw, 92px);
  }

  .page-news .news-rhythm__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(16px, 2.4vw, 26px);
  }
}

@media (max-width: 480px) {
  .page-news .news-timeline {
    padding-left: 24px;
  }

  .page-news .news-timeline__node {
    left: -24px;
    width: 9px;
    height: 9px;
  }

  .page-news .news-timeline::before {
    left: 4px;
  }

  .page-news .news-fallback__actions .og-btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-news .news-timeline__node,
  .page-news .news-seg__btn {
    transition: none;
  }

  .page-news .news-timeline__item:hover .news-timeline__node {
    transform: none;
  }
}