.page-about {
  --about-hair: rgba(74, 79, 85, .2);
  --about-hair-dark: rgba(201, 206, 212, .18);
  background-color: var(--cream);
  color: var(--ink);
}

/* ---------- 首屏：深海蓝 + 右侧团队数字 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset-inline-end: -16%;
  inset-block-start: -34%;
  width: min(640px, 80vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 34%, rgba(216, 35, 42, .4), transparent 66%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb,
.page-about .about-hero .breadcrumb a {
  color: rgba(245, 241, 232, .66);
}

.page-about .about-hero .breadcrumb [aria-current="page"] {
  color: var(--cream);
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--cream);
  text-decoration: underline;
}

.page-about .about-hero__grid {
  margin-top: clamp(26px, 5vw, 56px);
}

.page-about .about-hero__lead {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-hero .eyebrow {
  color: var(--clay);
  letter-spacing: .16em;
  margin: 0;
}

.page-about .about-hero .display-1 {
  margin: 0;
  max-width: 20ch;
  color: var(--cream);
}

.page-about .about-hero .lede {
  margin: 0;
  max-width: 56ch;
  color: rgba(245, 241, 232, .86);
}

.page-about .about-hero__fine {
  margin: 0;
  max-width: 56ch;
  font-size: .88rem;
  line-height: 1.75;
  color: rgba(245, 241, 232, .54);
  border-inline-start: 3px solid var(--clay);
  padding-inline-start: 14px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-hero__stats {
  align-self: start;
}

.page-about .about-hero__stats-title {
  margin: 0 0 14px;
  font-size: .78rem;
  letter-spacing: .16em;
  color: rgba(245, 241, 232, .6);
}

.page-about .about-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-hair-dark);
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-about .about-figures li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: clamp(14px, 2.4vw, 20px);
  background: rgba(11, 17, 22, .52);
}

.page-about .about-figures__num {
  flex: none;
  min-width: 1.6em;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  line-height: 1;
  color: var(--cream);
}

.page-about .about-figures__label {
  font-size: .92rem;
  line-height: 1.6;
  color: rgba(245, 241, 232, .72);
}

/* ---------- 编年时间轴 ---------- */
.page-about .about-chronicle {
  padding-block: clamp(46px, 7vw, 92px);
}

.page-about .about-chronicle__intro {
  max-width: 62ch;
  margin: 14px 0 0;
  color: var(--ink-soft);
}

.page-about .about-chronicle__stage {
  position: relative;
  margin-top: clamp(26px, 4vw, 46px);
  padding-block: clamp(30px, 5vw, 58px);
  border-radius: var(--r-panel);
  overflow: hidden;
  background: var(--sea-ink);
}

.page-about .about-chronicle__backdrop {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .26;
  filter: grayscale(.55) contrast(1.06);
}

.page-about .about-chronicle__veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 17, 22, .92) 0%, rgba(11, 17, 22, .6) 46%, rgba(11, 17, 22, .94) 100%),
    linear-gradient(90deg, rgba(14, 42, 71, .88) 0%, rgba(14, 42, 71, 0) 62%);
}

.page-about .about-chronicle__stage > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline {
  display: flex;
  align-items: stretch;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--clay) rgba(201, 206, 212, .14);
}

.page-about .about-timeline::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline::-webkit-scrollbar-track {
  background: rgba(201, 206, 212, .14);
  border-radius: var(--r-pill);
}

.page-about .about-timeline::-webkit-scrollbar-thumb {
  background: var(--clay);
  border-radius: var(--r-pill);
}

.page-about .about-timeline:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 6px;
}

.page-about .about-timeline__item {
  position: relative;
  flex: 0 0 min(268px, 76vw);
  scroll-snap-align: start;
  padding: 0 clamp(18px, 3vw, 28px) 22px 0;
}

.page-about .about-timeline__year {
  margin: 0;
  font-size: clamp(30px, 4.4vw, 46px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--clay);
}

.page-about .about-timeline__axis {
  position: relative;
  display: block;
  height: 12px;
  margin: 16px 0 18px;
}

.page-about .about-timeline__axis::before {
  content: "";
  position: absolute;
  left: 0;
  right: -4px;
  top: 5px;
  height: 2px;
  background: linear-gradient(90deg, var(--moss), rgba(110, 127, 92, .18));
}

.page-about .about-timeline__axis .timeline-node {
  position: absolute;
  left: 0;
  top: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(196, 98, 60, .22);
}

.page-about .about-timeline__title {
  margin: 0 0 10px;
  font-family: var(--font-editorial);
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: rgba(245, 241, 232, .72);
}

/* ---------- 内容体系四块 ---------- */
.page-about .about-system {
  padding-block: clamp(46px, 7vw, 88px);
}

.page-about .about-system__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-system__tabs .tab {
  appearance: none;
  cursor: pointer;
  padding: 10px 20px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-hair);
  background: transparent;
  color: var(--ink);
  font-size: .95rem;
  font-family: inherit;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-system__tabs .tab:hover {
  border-color: var(--clay);
}

.page-about .about-system__tabs .tab[aria-selected="true"] {
  background: var(--sea);
  border-color: var(--sea);
  color: var(--cream);
}

.page-about .about-system__tabs .tab:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

.page-about .about-system .tab-panel {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(22px, 3.6vw, 42px);
  border-radius: var(--r-card);
  background: var(--paper-moss);
  border-inline-start: 5px solid var(--moss);
}

.page-about .about-system .tab-panel h3 {
  margin: 0 0 12px;
  font-family: var(--font-editorial);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-system .tab-panel > p {
  margin: 0;
  max-width: 62ch;
  color: var(--ink-soft);
}

.page-about .about-system__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-system__list li {
  position: relative;
  padding-inline-start: 24px;
  font-size: .96rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .about-system__list li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: .66em;
  width: 12px;
  height: 2px;
  background: var(--clay);
}

.page-about .about-system__more {
  margin: 24px 0 0;
  font-size: .95rem;
}

.page-about .about-system__more a {
  color: var(--red-dark);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-about .about-system__more a:hover {
  color: var(--red);
}

.page-about .about-system__more a:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

/* ---------- 双编辑部 ---------- */
.page-about .about-desk {
  padding-block: clamp(46px, 7vw, 88px);
  background-color: var(--paper-moss);
}

.page-about .about-desk__copy > p {
  margin: 0 0 18px;
  max-width: 60ch;
  color: var(--ink-soft);
}

.page-about .about-desk__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-desk__facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: .95rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .about-desk__facts span {
  flex: none;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .08em;
  color: var(--red-dark);
  border: 1px solid currentColor;
  border-radius: var(--r-pill);
  padding: 3px 10px;
}

.page-about .about-desk__media {
  margin: 0;
}

.page-about .about-desk__media .media-frame {
  border-radius: var(--r-card);
  overflow: hidden;
}

/* ---------- 引文带 ---------- */
.page-about .about-quote {
  padding-block: clamp(48px, 8vw, 96px);
}

.page-about .about-quote__block {
  margin: 0;
  padding-inline-start: clamp(20px, 3vw, 34px);
  border-inline-start: 5px solid var(--sea);
}

.page-about .about-quote__text {
  margin: 0 0 20px;
  max-width: 40ch;
  font-family: var(--font-editorial);
  font-size: clamp(1.18rem, 2.6vw, 1.86rem);
  font-weight: 600;
  line-height: 1.55;
  color: var(--sea);
}

.page-about .about-quote__source {
  font-size: .86rem;
  letter-spacing: .06em;
  color: var(--sea);
  opacity: .76;
}

/* ---------- 复核与误差边界 ---------- */
.page-about .about-check {
  padding-block: clamp(46px, 7vw, 92px);
}

.page-about .about-check__copy > p {
  margin: 0 0 16px;
  max-width: 60ch;
  color: var(--ink-soft);
}

.page-about .about-check__steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-check__steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding-block: 20px;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-check__steps li:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-check__step-no {
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--clay);
  padding-top: .34em;
}

.page-about .about-check__steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-editorial);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-check__steps p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-about .about-check__edge {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-radius: var(--r-card);
  background: var(--paper-clay);
  border-inline-start: 4px solid var(--clay);
  font-size: .93rem;
  line-height: 1.75;
  color: var(--ink);
  max-width: 60ch;
}

.page-about .about-check__media {
  margin: 0;
}

.page-about .about-check__frame {
  aspect-ratio: 4 / 5;
  border-radius: var(--r-card);
  overflow: hidden;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach {
  padding-block: clamp(48px, 8vw, 96px);
}

.page-about .about-reach .section-title {
  color: var(--cream);
}

.page-about .about-reach__viz {
  display: flex;
  flex-direction: column;
  gap: 22px;
  align-items: center;
}

.page-about .about-reach__rings {
  position: relative;
  width: min(260px, 62vw);
  aspect-ratio: 1;
}

.page-about .about-reach__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--about-hair-dark);
}

.page-about .about-reach__ring--outer {
  inset: 0;
  border-color: rgba(196, 98, 60, .72);
}

.page-about .about-reach__ring--mid {
  inset: 17%;
  border-color: rgba(110, 127, 92, .78);
}

.page-about .about-reach__ring--inner {
  inset: 34%;
  border-color: rgba(201, 206, 212, .38);
}

.page-about .about-reach__core {
  position: absolute;
  inset: 44%;
  border-radius: 50%;
  background: var(--cream);
  box-shadow: 0 0 26px rgba(245, 241, 232, .32);
}

.page-about .about-reach__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: .88rem;
  color: rgba(245, 241, 232, .7);
}

.page-about .about-reach__legend li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .about-reach__key {
  flex: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 1px solid transparent;
}

.page-about .about-reach__key--outer {
  background: var(--clay);
}

.page-about .about-reach__key--mid {
  background: var(--moss);
}

.page-about .about-reach__key--inner {
  background: var(--silver);
}

.page-about .about-reach__cells {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair-dark);
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-about .about-reach__cells .data-cell {
  padding: clamp(16px, 2.6vw, 26px);
  background: rgba(11, 17, 22, .55);
}

.page-about .about-reach__cells .data-label {
  margin: 0;
  font-size: .78rem;
  letter-spacing: .12em;
  color: rgba(245, 241, 232, .58);
}

.page-about .about-reach__cells .data-num {
  margin: 12px 0 0;
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  line-height: 1;
  color: var(--cream);
}

.page-about .about-reach__cells .data-unit {
  margin: 8px 0 0;
  font-size: .8rem;
  color: rgba(245, 241, 232, .52);
}

.page-about .about-reach__note {
  margin: 24px 0 0;
  max-width: 58ch;
  font-size: .96rem;
  line-height: 1.78;
  color: rgba(245, 241, 232, .74);
}

/* ---------- 读者与使用场景 ---------- */
.page-about .about-readers {
  padding-block: clamp(46px, 7vw, 88px);
}

.page-about .about-readers__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(24px, 4vw, 42px);
}

.page-about .about-reader {
  padding-top: 20px;
  border-top: 2px solid var(--sea);
}

.page-about .about-reader:nth-child(2) {
  border-top-color: var(--clay);
}

.page-about .about-reader:nth-child(3) {
  border-top-color: var(--moss);
}

.page-about .about-reader__no {
  margin: 0 0 12px;
  font-size: .8rem;
  letter-spacing: .14em;
  color: var(--stone);
}

.page-about .about-reader h3 {
  margin: 0 0 12px;
  font-family: var(--font-editorial);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-reader p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 继续阅读 ---------- */
.page-about .about-next {
  padding-block: clamp(46px, 7vw, 88px);
}

.page-about .about-next .section-title {
  color: var(--cream);
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(24px, 4vw, 40px);
  background: var(--about-hair-dark);
  border: 1px solid var(--about-hair-dark);
  border-radius: var(--r-card);
  overflow: hidden;
}

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px);
  background: rgba(11, 17, 22, .52);
  text-decoration: none;
  color: inherit;
  transition: background var(--dur) var(--ease);
}

.page-about .about-next__link:hover {
  background: rgba(216, 35, 42, .18);
}

.page-about .about-next__link:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: -2px;
}

.page-about .about-next__kicker {
  font-family: var(--font-editorial);
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--cream);
}

.page-about .about-next__desc {
  font-size: .9rem;
  line-height: 1.72;
  color: rgba(245, 241, 232, .68);
}

/* ---------- 窄屏兜底 ---------- */
.page-about .grid--12 > *,
.page-about .grid--split > *,
.page-about .grid--split-rev > * {
  min-width: 0;
}

@media (max-width: 899px) {
  .page-about .grid--12,
  .page-about .grid--split,
  .page-about .grid--split-rev {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .grid--12 > *,
  .page-about .grid--split > *,
  .page-about .grid--split-rev > * {
    grid-column: auto;
  }

  .page-about .about-timeline__item {
    flex: 0 0 min(84vw, 320px);
  }

  .page-about .about-chronicle__veil {
    background:
      linear-gradient(180deg, rgba(11, 17, 22, .94) 0%, rgba(11, 17, 22, .72) 46%, rgba(11, 17, 22, .95) 100%);
  }
}

@media (min-width: 700px) {
  .page-about .about-readers__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(24px, 3vw, 44px);
  }

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

@media (min-width: 1080px) {
  .page-about .about-hero .display-1 {
    max-width: 19ch;
  }

  .page-about .about-timeline__item {
    flex: 0 0 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline {
    scroll-behavior: auto;
  }

  .page-about .about-next__link,
  .page-about .about-system__tabs .tab {
    transition: none;
  }
}