.page-about {
  --about-rail: 176px;
  background: var(--paper);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 52px;
  color: var(--paper);
  background:
    radial-gradient(112% 82% at 86% 0%, rgba(224, 168, 60, .34), transparent 60%),
    radial-gradient(90% 70% at 4% 104%, rgba(169, 240, 75, .14), transparent 62%),
    linear-gradient(155deg, var(--ink-mid) 0%, var(--ink) 46%, var(--ink-dark) 100%);
  border-bottom-left-radius: var(--radius-xl);
  border-bottom-right-radius: var(--radius-xl);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(244, 241, 232, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 241, 232, .05) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(120% 92% at 72% 0%, #000 18%, transparent 78%);
  mask-image: radial-gradient(120% 92% at 72% 0%, #000 18%, transparent 78%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(244, 241, 232, .68);
}

.page-about .about-crumb a {
  color: var(--gold-soft);
  text-decoration: none;
}

.page-about .about-crumb a:hover {
  text-decoration: underline;
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--gold-soft);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(34px, 9vw, 84px);
  line-height: 1.03;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold-soft);
}

.page-about .about-hero__lede {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(244, 241, 232, .86);
}

.page-about .about-hero__stats {
  display: grid;
  gap: 16px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold-soft);
}

.page-about .about-hero__cap {
  font-size: 13px;
  letter-spacing: .08em;
  color: rgba(244, 241, 232, .7);
}

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 34px 0 66px;
  }

  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid rgba(244, 241, 232, .18);
  }

  .page-about .about-hero__stats li + li {
    padding-left: 24px;
    border-left: 1px solid rgba(244, 241, 232, .18);
  }
}

/* ---------- 主流程：左侧刻度线 + 右侧画板 ---------- */
.page-about .about-flow {
  padding: 36px 0 60px;
}

.page-about .about-flow__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

@media (min-width: 900px) {
  .page-about .about-flow {
    padding: 74px 0 96px;
  }

  .page-about .about-flow__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 62px;
  }
}

/* 刻度线 */
.page-about .about-rail {
  min-width: 0;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-about .about-rail::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__head {
  margin: 0 0 10px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--text-soft);
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__item {
  position: relative;
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--mist);
  border-radius: 999px;
  background: var(--paper-3);
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
  transition: background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--gold-ink);
}

.page-about .about-rail__name {
  font-size: 13px;
  font-weight: 600;
}

.page-about .about-rail__link[aria-current="location"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-about .about-rail__link[aria-current="location"] .about-rail__year {
  color: var(--gold-soft);
}

@media (min-width: 900px) {
  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
    overflow: visible;
    padding: 6px 0 6px 26px;
  }

  .page-about .about-rail::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 32px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--mist) 0%, rgba(195, 212, 210, .12) 100%);
  }

  .page-about .about-rail__head {
    margin: 0 0 18px;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 2px;
  }

  .page-about .about-rail__item {
    flex: none;
  }

  .page-about .about-rail__link {
    display: block;
    position: relative;
    padding: 9px 0;
    border: 0;
    border-radius: 0;
    background: none;
    white-space: normal;
  }

  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: -26px;
    top: 50%;
    transform: translateY(-50%);
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: 1.5px solid var(--mist);
    background: var(--paper);
    transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
  }

  .page-about .about-rail__link[aria-current="location"] {
    background: none;
    border-color: transparent;
    color: var(--text);
  }

  .page-about .about-rail__link[aria-current="location"]::before {
    background: var(--gold);
    border-color: var(--gold);
    box-shadow: 0 0 0 4px rgba(224, 168, 60, .22);
  }

  .page-about .about-rail__link[aria-current="location"] .about-rail__year {
    color: var(--gold-ink);
  }

  .page-about .about-rail__year {
    display: block;
    font-size: 12px;
    line-height: 1.6;
  }

  .page-about .about-rail__name {
    display: block;
    font-size: 15px;
    line-height: 1.5;
  }
}

/* 画板堆叠 */
.page-about .about-flow__panels {
  display: grid;
  gap: 52px;
  min-width: 0;
}

.page-about .about-flow__panels > * {
  min-width: 0;
}

@media (min-width: 900px) {
  .page-about .about-flow__panels {
    gap: 86px;
  }

  .page-about .about-panel--offset {
    margin-left: 72px;
  }
}

.page-about .about-panel {
  position: relative;
  scroll-margin-top: 92px;
}

.page-about .section-label {
  position: relative;
  margin: 0 0 14px;
  padding-left: 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--gold-ink);
}

.page-about .about-panel .section-label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--gold);
}

.page-about .about-panel__title {
  margin: 0 0 18px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(27px, 5.4vw, 46px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-panel__lede {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: 17px;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-panel__text {
  max-width: 62ch;
}

.page-about .about-panel__text p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-panel__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-panel__action {
  margin: 24px 0 0;
}

/* 深色画板 */
.page-about .about-panel--ink {
  padding: 32px 22px;
  border-radius: var(--radius-xl);
  color: var(--paper);
  background:
    radial-gradient(104% 72% at 100% 0%, rgba(224, 168, 60, .2), transparent 60%),
    linear-gradient(150deg, var(--ink) 0%, var(--ink-mid) 72%, var(--ink-dark) 100%);
}

.page-about .about-panel--ink .about-panel__title {
  color: var(--paper);
}

.page-about .about-panel--ink .about-panel__lede {
  color: rgba(244, 241, 232, .8);
}

.page-about .about-panel--ink .section-label {
  color: var(--gold-soft);
}

@media (min-width: 720px) {
  .page-about .about-panel--ink {
    padding: 50px 44px 54px;
  }
}

/* 图片容器统一 */
.page-about figure.media-frame {
  margin: 0;
}

.page-about figure.media-frame > img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media-frame__caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-soft);
}

.page-about .about-panel--ink .media-frame__caption {
  color: rgba(244, 241, 232, .62);
}

.page-about .about-figure {
  margin-bottom: 32px;
}

/* 版本节点 */
.page-about .about-steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .about-step {
  padding: 18px 16px 20px;
  border-top: 2px solid var(--mist);
  background: var(--paper-3);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.page-about .about-step__idx {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--gold-ink);
}

.page-about .about-step__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-soft);
}

@media (min-width: 640px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 团队 */
.page-about .about-team {
  margin-top: 4px;
}

.page-about .about-team__media {
  margin-bottom: 26px;
}

.page-about .about-team__media figure.media-frame > img {
  border-radius: var(--radius-lg);
}

.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding: 16px 18px 18px;
  border: 1px solid rgba(244, 241, 232, .16);
  border-radius: var(--radius-md);
  background: rgba(244, 241, 232, .06);
  transition: border-color .3s var(--ease), background .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-role:hover {
  border-color: rgba(224, 168, 60, .55);
  background: rgba(244, 241, 232, .1);
  transform: translateY(-2px);
}

.page-about .about-role__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold-soft);
}

.page-about .about-role__name {
  display: block;
  margin: 8px 0 8px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(244, 241, 232, .74);
}

/* 数据来源 */
.page-about .about-sources {
  margin-top: 4px;
}

.page-about .about-sources p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-sources p:last-child {
  margin-bottom: 0;
}

.page-about .about-callout {
  padding: 24px 22px 26px;
  border-radius: var(--radius-lg);
  color: var(--paper);
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(224, 168, 60, .26), transparent 62%),
    linear-gradient(160deg, var(--ink) 0%, var(--ink-dark) 100%);
  box-shadow: var(--shadow-panel);
}

.page-about .about-callout__label {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--gold-soft);
}

.page-about .about-callout p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(244, 241, 232, .84);
}

.page-about .about-callout .about-callout__action {
  margin: 0;
}

/* 纹理带 */
.page-about .about-band {
  margin: 0;
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: 168px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.page-about .about-band figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-soft);
}

@media (min-width: 720px) {
  .page-about .about-band img {
    height: 232px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-band img {
    height: 276px;
  }
}

/* 更新节奏 */
.page-about .about-rhythm {
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
}

.page-about .about-rhythm__item {
  position: relative;
  padding: 18px 0;
  border-bottom: 1px solid var(--mist);
}

.page-about .about-rhythm__item:first-child {
  border-top: 1px solid var(--mist);
}

.page-about .about-rhythm__when {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--gold-ink);
}

.page-about .about-rhythm__name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-rhythm__item p {
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--text-soft);
}

@media (min-width: 640px) {
  .page-about .about-rhythm__item {
    padding: 22px 0 22px 92px;
  }

  .page-about .about-rhythm__when {
    position: absolute;
    left: 0;
    top: 24px;
    margin: 0;
  }
}

/* 规模数字 */
.page-about .about-stats {
  display: grid;
  gap: 26px;
  margin-top: 6px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 7.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .about-stat:first-child .about-stat__num {
  color: var(--lime);
}

.page-about .about-stat:last-child .about-stat__num {
  color: var(--gold-soft);
}

.page-about .about-stat__cap {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .about-stat__note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(244, 241, 232, .68);
}

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 38px;
  }
}

/* 准则 */
.page-about .about-principles {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-principle {
  border: 1px solid var(--mist);
  border-radius: var(--radius-md);
  background: var(--paper-3);
  overflow: hidden;
  transition: border-color .3s var(--ease);
}

.page-about .about-principle[open] {
  border-color: rgba(224, 168, 60, .6);
}

.page-about .about-principle summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-principle summary::-webkit-details-marker {
  display: none;
}

.page-about .about-principle summary::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--gold);
  transition: transform .3s var(--ease), background .3s var(--ease);
}

.page-about .about-principle[open] summary::before {
  background: var(--lime);
  transform: rotate(45deg);
}

.page-about .about-principle p {
  margin: 0;
  padding: 0 18px 20px 18px;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text-soft);
}

@media (min-width: 640px) {
  .page-about .about-principle summary {
    padding: 18px 22px;
    font-size: 17px;
  }

  .page-about .about-principle p {
    padding: 0 22px 22px 46px;
  }
}

/* 尾部行动区 */
.page-about .about-cta__inner {
  padding: 34px 22px 36px;
  border-radius: var(--radius-xl);
  color: var(--paper);
  background:
    radial-gradient(112% 92% at 88% 0%, rgba(224, 168, 60, .3), transparent 62%),
    linear-gradient(150deg, var(--ink) 0%, var(--ink-mid) 100%);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(23px, 4.6vw, 34px);
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-cta__inner p {
  max-width: 58ch;
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.74;
  color: rgba(244, 241, 232, .82);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 720px) {
  .page-about .about-cta__inner {
    padding: 48px 46px 50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-principle,
  .page-about .about-rail__link,
  .page-about .about-rail__link::before {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: none;
  }
}
<<<END>>>