.page-about {
  --about-hair: rgba(200, 162, 74, 0.28);
  --about-hair-soft: rgba(200, 162, 74, 0.14);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.8;
  overflow-x: hidden;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
}

.page-about h1 {
  font-size: clamp(2rem, 7vw, 3.5rem);
}

.page-about h2 {
  font-size: clamp(1.55rem, 4.4vw, 2.5rem);
  margin-bottom: var(--sp-2);
}

.page-about h3 {
  font-size: var(--fs-md);
}

.page-about p {
  margin: 0 0 var(--sp-2);
}

.page-about a {
  color: var(--gold-lite);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

/* 面包屑 */
.page-about .breadcrumb {
  padding: var(--sp-3) 0 0;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-ui);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
}

.page-about .breadcrumb__link {
  color: var(--steel);
  text-decoration: none;
}

.page-about .breadcrumb__link:hover {
  color: var(--gold-lite);
}

.page-about .breadcrumb__sep {
  color: var(--ink-700);
}

.page-about .breadcrumb__current {
  color: var(--gold);
}

/* 章节编号标签 */
.page-about .eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: var(--fs-xs);
  letter-spacing: 0.22em;
  color: var(--gold);
  margin: 0 0 var(--sp-2);
}

.page-about .eyebrow__num {
  font-family: var(--font-mono);
  color: var(--gold-lite);
  letter-spacing: 0.08em;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: var(--sp-3) 0 var(--sp-6);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--about-hair), transparent);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .about-hero__dek {
  margin-top: var(--sp-3);
  font-size: var(--fs-md);
  color: var(--steel-lite);
  max-width: 54ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--sp-4);
}

.page-about .about-hero__panel {
  position: relative;
  padding: var(--sp-3);
  border: 1px solid var(--about-hair);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-900) 72%);
  box-shadow: var(--shadow-2);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 52px;
  height: 3px;
  background: var(--ruby);
}

.page-about .about-hero__panel-title {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-ui);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--steel);
}

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

.page-about .about-stats li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--about-hair-soft);
}

.page-about .about-stats li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--gold-lite);
  line-height: 1;
}

.page-about .about-stats__label {
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  color: var(--steel-lite);
}

/* 章节索引条 */
.page-about .about-index {
  background: var(--ink-800);
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-index__inner {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 10px 0;
  overflow-x: auto;
}

.page-about .about-index__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--steel);
}

.page-about .about-index__list {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__list a {
  display: block;
  white-space: nowrap;
  padding: 6px 12px;
  border: 1px solid transparent;
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  color: var(--steel-lite);
  text-decoration: none;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}

.page-about .about-index__list a:hover {
  color: var(--gold-lite);
  border-color: var(--about-hair);
}

.page-about .about-index__list a[aria-current="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-900);
}

/* 通用章节 */
.page-about .about-sec {
  position: relative;
  padding: var(--sp-6) 0;
  border-top: 1px solid var(--about-hair-soft);
}

/* 起点 */
.page-about .about-origin__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .about-origin__text p {
  color: var(--steel-lite);
}

.page-about .about-origin__text .about-origin__lead {
  color: var(--paper);
  font-size: var(--fs-md);
}

.page-about .about-ledger {
  margin: 0;
  padding: var(--sp-3);
  border: 1px solid var(--about-hair);
  background: rgba(20, 58, 49, 0.55);
}

.page-about .about-ledger__row {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-ledger__row:first-child {
  padding-top: 0;
}

.page-about .about-ledger__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-ledger dt {
  font-family: var(--font-ui);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .about-ledger dd {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--paper);
}

/* 段位 */
.page-about .about-ranks__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .about-ranks__intro p {
  color: var(--steel-lite);
}

.page-about .about-ranks__metrics {
  list-style: none;
  margin: var(--sp-3) 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair);
}

.page-about .about-ranks__metrics li {
  display: grid;
  gap: 2px;
  padding: 12px 16px;
  background: var(--ink-800);
}

.page-about .about-ranks__mkey {
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--gold-lite);
}

.page-about .about-ranks__mval {
  font-size: var(--fs-sm);
  color: var(--steel);
}

.page-about .about-ranks__note {
  font-size: var(--fs-sm);
  color: var(--steel);
}

.page-about .about-ranks__stage {
  display: grid;
  gap: var(--sp-3);
  justify-items: center;
}

.page-about .about-rings {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
}

.page-about .about-ranks__stage .media-frame {
  width: 100%;
  max-width: 340px;
}

.page-about .about-ranks__list {
  list-style: none;
  margin: var(--sp-5) 0 0;
  padding: 0;
  display: grid;
}

.page-about .about-ranks__list li {
  display: grid;
  grid-template-columns: 2.6em minmax(0, 1fr);
  gap: 0 var(--sp-2);
  padding: var(--sp-2) 0;
  border-top: 1px solid var(--about-hair-soft);
}

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

.page-about .about-ranks__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--gold);
  line-height: 1.9;
}

.page-about .about-ranks__body {
  display: flex;
  flex-wrap: wrap;
  gap: 0 18px;
  align-items: baseline;
}

.page-about .about-ranks__name {
  min-width: 4.2em;
  color: var(--gold-lite);
  font-size: var(--fs-md);
}

.page-about .about-ranks__desc {
  flex: 1 1 15em;
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--steel-lite);
}

/* 团队 */
.page-about .about-team__lead {
  max-width: 62ch;
  color: var(--steel-lite);
}

.page-about .about-team__media {
  margin: var(--sp-3) 0 var(--sp-4);
}

.page-about .about-team__grid {
  display: grid;
  gap: var(--sp-2);
}

.page-about .role-card {
  position: relative;
  padding: var(--sp-3);
  border: 1px solid var(--about-hair-soft);
  background: var(--ink-800);
  transition: border-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}

.page-about .role-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 8px;
  height: 8px;
  background: var(--ruby);
  opacity: 0.7;
}

.page-about .role-card:hover,
.page-about .role-card:focus-within {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .role-card:focus {
  outline: 2px solid var(--gold-lite);
  outline-offset: 3px;
}

.page-about .role-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-2xl);
  line-height: 1;
  color: var(--gold);
  opacity: 0.5;
}

.page-about .role-card__title {
  margin: 10px 0 4px;
  color: var(--paper);
}

.page-about .role-card__count {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--gold-lite);
}

.page-about .role-card__brief {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--steel-lite);
}

.page-about .role-card__more {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--about-hair-soft);
  font-size: var(--fs-sm);
  color: var(--steel);
}

/* 校对 */
.page-about .about-review {
  background: var(--paper);
  color: var(--coal);
  border-top: 2px solid var(--gold);
  border-bottom: 2px solid var(--gold);
}

.page-about .about-review .eyebrow {
  color: var(--wine);
}

.page-about .about-review .eyebrow__num {
  color: var(--wine);
}

.page-about .about-review h2 {
  color: var(--coal);
}

.page-about .about-review__head p {
  color: #3b342c;
  max-width: 66ch;
}

.page-about .about-steps {
  list-style: none;
  margin: var(--sp-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-about .about-step {
  padding: var(--sp-3);
  background: #fff;
  border-left: 3px solid var(--wine);
  box-shadow: 0 1px 0 rgba(18, 16, 14, 0.08);
}

.page-about .about-step__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--wine);
}

.page-about .about-step__title {
  margin: 6px 0 8px;
  color: var(--coal);
  font-size: var(--fs-lg);
}

.page-about .about-step__text {
  margin: 0;
  font-size: var(--fs-sm);
  color: #4a423a;
}

/* 时间轴 */
.page-about .about-timeline {
  overflow: hidden;
  border-top: 1px solid var(--about-hair-soft);
  padding: var(--sp-6) 0 var(--sp-5);
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-timeline__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
}

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

.page-about .about-timeline__lead {
  max-width: 56ch;
  color: var(--steel-lite);
}

.page-about .about-timeline__scroller {
  position: relative;
  z-index: 1;
  margin-top: var(--sp-3);
  padding: var(--sp-3) var(--gutter) var(--sp-3);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline__track {
  position: relative;
  display: flex;
  gap: var(--sp-3);
  list-style: none;
  margin: 0;
  padding: 0 0 var(--sp-2);
  min-width: min-content;
}

.page-about .about-timeline__track::before {
  content: "";
  position: absolute;
  top: 5px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(200, 162, 74, 0.1), var(--gold), rgba(200, 162, 74, 0.1));
}

.page-about .about-timeline__item {
  position: relative;
  flex: 0 0 232px;
  padding-top: 30px;
  scroll-snap-align: start;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 10px;
  height: 10px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--ink-900);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  top: 10px;
  left: 4px;
  width: 1px;
  height: 12px;
  background: var(--about-hair);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  color: var(--gold-lite);
  line-height: 1.2;
}

.page-about .about-timeline__title {
  margin: 6px 0 6px;
  color: var(--paper);
  font-size: var(--fs-base);
}

.page-about .about-timeline__desc {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--steel-lite);
}

/* 对照表 */
.page-about .about-habits__lead {
  max-width: 64ch;
  color: var(--steel-lite);
}

.page-about .about-habits__panel {
  margin-top: var(--sp-4);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--sp-3);
}

.page-about .filter-bar .filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--about-hair);
  background: transparent;
  color: var(--steel-lite);
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  cursor: pointer;
  transition: color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease), background-color var(--dur-2) var(--ease);
}

.page-about .filter-bar .filter-btn:hover {
  color: var(--gold-lite);
  border-color: var(--gold);
}

.page-about .filter-bar .filter-btn[aria-pressed="true"] {
  background: var(--ruby);
  border-color: var(--ruby);
  color: #fff;
}

.page-about .about-habits__scroll {
  overflow-x: auto;
  border: 1px solid var(--about-hair);
}

.page-about .about-habits__table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: var(--fs-sm);
}

.page-about .about-habits__caption {
  caption-side: top;
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-ui);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--gold);
  background: var(--ink-800);
}

.page-about .about-habits__table th,
.page-about .about-habits__table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--about-hair-soft);
  font-weight: 400;
}

.page-about .about-habits__table thead th {
  font-family: var(--font-ui);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  color: var(--gold);
  white-space: nowrap;
  background: var(--ink-800);
}

.page-about .about-habits__table tbody th {
  font-family: var(--font-head);
  font-weight: 800;
  color: var(--paper);
  white-space: nowrap;
}

.page-about .about-habits__table tbody td {
  color: var(--steel-lite);
}

.page-about .about-habits__table tbody tr:nth-child(odd) {
  background: rgba(126, 147, 166, 0.06);
}

.page-about .about-habits__table tbody tr:hover {
  background: rgba(200, 162, 74, 0.09);
}

.page-about .about-habits__foot {
  margin-top: var(--sp-3);
  font-size: var(--fs-sm);
  color: var(--steel);
}

/* 供稿 */
.page-about .about-partners__grid {
  display: grid;
  gap: var(--sp-4);
}

.page-about .about-partners__text p {
  color: var(--steel-lite);
}

.page-about .about-partners__links {
  display: grid;
  gap: 1px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair);
  align-content: start;
}

.page-about .about-partners__link {
  display: grid;
  gap: 2px;
  padding: 16px var(--sp-3);
  background: var(--ink-800);
  text-decoration: none;
  transition: background-color var(--dur-2) var(--ease);
}

.page-about .about-partners__link:hover {
  background: var(--ink-700);
}

.page-about .about-partners__link-k {
  font-family: var(--font-ui);
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--gold-lite);
}

.page-about .about-partners__link-v {
  font-size: var(--fs-sm);
  color: var(--steel);
}

/* 结尾行动条 */
.page-about .about-cta {
  background: var(--wine);
  border-top: 1px solid rgba(200, 162, 74, 0.5);
  padding: var(--sp-5) 0;
}

.page-about .about-cta h2 {
  color: var(--paper);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
}

.page-about .about-cta__lead {
  margin: 0;
  max-width: 54ch;
  color: rgba(244, 239, 230, 0.8);
  font-size: var(--fs-sm);
}

.page-about .about-cta__grid {
  display: grid;
  gap: var(--sp-3);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

.page-about .about-cta__link {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border: 1px solid rgba(244, 239, 230, 0.45);
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}

.page-about .about-cta__link:hover {
  border-color: var(--gold-lite);
  color: var(--gold-lite);
}

/* 断点 */
@media (min-width: 640px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: var(--sp-5);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-about .about-ranks__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-about .about-ranks__stage {
    justify-items: stretch;
  }

  .page-about .about-rings {
    max-width: none;
    margin: 0 auto;
  }

  .page-about .about-ranks__stage .media-frame {
    max-width: none;
  }

  .page-about .about-ranks__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--sp-5);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-about .about-sec {
    padding: var(--sp-7) 0;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (hover: hover) and (min-width: 1080px) {
  .page-about .role-card__more {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    opacity: 0;
    overflow: hidden;
    transition: max-height var(--dur-3) var(--ease), opacity var(--dur-2) var(--ease),
      margin var(--dur-2) var(--ease), padding var(--dur-2) var(--ease),
      border-color var(--dur-2) var(--ease);
  }

  .page-about .role-card:hover .role-card__more,
  .page-about .role-card:focus-within .role-card__more,
  .page-about .role-card:focus .role-card__more {
    max-height: 14em;
    margin-top: 12px;
    padding-top: 10px;
    border-top-color: var(--about-hair-soft);
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .role-card__more,
  .page-about .filter-bar .filter-btn,
  .page-about .about-cta__link,
  .page-about .about-partners__link,
  .page-about .about-index__list a {
    transition: none;
  }

  .page-about .role-card:hover,
  .page-about .role-card:focus-within {
    transform: none;
  }
}
<<<END>>>