.page-about {
  background-color: var(--paper);
  color: var(--fog);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 24px 0 44px;
  border-bottom: 1px solid var(--line);
  background-color: var(--paper);
  background-image:
    linear-gradient(to right, rgba(201, 194, 182, 0.34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 194, 182, 0.34) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: -1px -1px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 20px;
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-hero__intro {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--fog);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stats .stat {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stats .stat__label {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fog);
  opacity: 0.82;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-hero__figure {
  margin: 0;
  padding: 8px;
  background-color: var(--paper-2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background-color: var(--fog);
}

.page-about .media-frame__caption {
  margin-top: 8px;
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.6;
  color: var(--fog);
  opacity: 0.8;
}

/* ---------- 章节轨 ---------- */
.page-about .about-rail {
  background-color: var(--ink);
  border-bottom: 1px solid rgba(251, 248, 241, 0.16);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__inner {
  display: flex;
  align-items: center;
  gap: 2px;
  padding-top: 8px;
  padding-bottom: 8px;
  min-width: max-content;
}

.page-about .rail__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 11px;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(251, 248, 241, 0.68);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .rail__link .mono {
  font-size: 11px;
  color: var(--red);
}

.page-about .rail__link:hover,
.page-about .rail__link:focus-visible {
  color: var(--white);
  border-color: rgba(251, 248, 241, 0.32);
  outline: none;
}

.page-about .rail__link[aria-current="true"] {
  color: var(--white);
  background-color: rgba(214, 64, 47, 0.16);
  border-color: var(--red);
}

/* ---------- 通用正文块 ---------- */
.page-about .about-origin__text p,
.page-about .about-coverage__lead,
.page-about .about-coverage__tail,
.page-about .registry__note,
.page-about .registry__hint {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--fog);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  padding-top: 52px;
  padding-bottom: 52px;
}

.page-about .about-origin__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 26px;
}

.page-about .theme-card {
  align-self: start;
  padding: 20px 18px;
  background-color: var(--paper-2);
  border: 1px solid var(--line);
  border-top: 3px solid var(--red);
  box-shadow: var(--shadow-hard);
}

.page-about .theme-card__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--red-deep);
  text-transform: uppercase;
}

.page-about .theme-card__num {
  margin: 8px 0 0;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.page-about .theme-card__num span {
  font-family: var(--font-head);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--fog);
  margin-left: 4px;
}

.page-about .theme-card__text {
  margin: 12px 0 16px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--fog);
}

.page-about .theme-card__link {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--red-deep);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .theme-card__link:hover,
.page-about .theme-card__link:focus-visible {
  color: var(--ink);
  border-color: var(--ink);
  outline: none;
}

/* ---------- 02 维护原则 ---------- */
.page-about .about-maintain {
  padding-top: 52px;
  padding-bottom: 52px;
  border-top: 1px solid var(--line);
}

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

.page-about .about-maintain__figure {
  margin: 0;
  padding: 8px;
  background-color: var(--paper-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  box-shadow: var(--shadow-hard);
}

.page-about .about-maintain__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background-color: var(--fog);
}

.page-about .line {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  column-gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .line__num {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--red);
  padding-top: 5px;
}

.page-about .line__main {
  min-width: 0;
}

.page-about .line__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .line__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--fog);
}

/* ---------- 03 时间轴 ---------- */
.page-about .about-timeline {
  padding-top: 52px;
  padding-bottom: 56px;
  background-color: var(--ink);
  background-image:
    linear-gradient(to right, rgba(251, 248, 241, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(251, 248, 241, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--white);
}

.page-about .about-timeline .section-head__title {
  color: var(--white);
}

.page-about .about-timeline .section-head__meta {
  color: var(--cyan);
}

.page-about .about-timeline .eyebrow {
  color: rgba(251, 248, 241, 0.7);
}

.page-about .tl {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 22px;
  border-left: 1px solid rgba(251, 248, 241, 0.24);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 28px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 5px;
  width: 9px;
  height: 9px;
  background-color: var(--red);
  border: 1px solid var(--ink);
  box-shadow: 0 0 0 1px rgba(214, 64, 47, 0.6);
}

.page-about .tl__item--current::before {
  background-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(46, 196, 182, 0.6);
}

.page-about .tl__year {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(251, 248, 241, 0.66);
  padding: 2px 7px;
  border: 1px solid rgba(251, 248, 241, 0.26);
}

.page-about .tl__title {
  margin: 10px 0 6px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .tl__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(251, 248, 241, 0.82);
}

.page-about .tl__note {
  margin: 10px 0 0;
  max-width: 34em;
  padding-left: 10px;
  border-left: 2px solid rgba(46, 196, 182, 0.45);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(251, 248, 241, 0.62);
  transition: color var(--dur) var(--ease), opacity var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-timeline__foot {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid rgba(251, 248, 241, 0.18);
}

/* ---------- 04 团队 ---------- */
.page-about .about-team {
  padding-top: 52px;
  padding-bottom: 52px;
}

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

.page-about .about-team__list {
  min-width: 0;
}

.page-about .crew {
  border-top: 1px solid var(--line);
}

.page-about .crew:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .crew__summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
}

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

.page-about .crew__summary::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background-color: var(--line);
  transition: background-color var(--dur) var(--ease);
}

.page-about .crew[open] .crew__summary::before {
  background-color: var(--red);
}

.page-about .crew__name {
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .crew__count {
  margin-left: auto;
  font-size: 13px;
  color: var(--cyan-deep);
}

.page-about .crew__body p {
  margin: 0;
  padding: 0 0 18px 18px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.76;
  color: var(--fog);
  border-left: 2px solid var(--paper-2);
  margin-left: 4px;
}

.page-about .about-team__figure {
  margin: 0;
  padding: 8px;
  background-color: var(--paper-2);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-hard);
  align-self: start;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background-color: var(--fog);
}

/* ---------- 05 覆盖 ---------- */
.page-about .about-coverage {
  padding-top: 52px;
  padding-bottom: 52px;
  border-top: 1px solid var(--line);
  background-color: var(--paper-2);
}

.page-about .about-coverage__lead {
  margin-top: 24px;
  max-width: 36em;
  color: var(--ink);
}

.page-about .cov-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 24px;
  background-color: var(--line);
  border: 1px solid var(--line);
}

.page-about .cov-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 18px 14px;
  background-color: var(--paper);
}

.page-about .cov-cell__num {
  font-size: clamp(24px, 6vw, 34px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.page-about .cov-cell__label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .cov-cell__note {
  font-size: 12px;
  line-height: 1.6;
  color: var(--fog);
  opacity: 0.85;
}

.page-about .about-coverage__tail {
  margin-top: 22px;
  max-width: 38em;
}

/* ---------- 06 主体 ---------- */
.page-about .about-registry {
  padding-top: 52px;
  padding-bottom: 60px;
}

.page-about .registry {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 26px;
}

.page-about .registry__icp {
  padding: 22px 20px;
  background-color: var(--white);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard-lift);
  align-self: start;
}

.page-about .registry__label {
  margin: 0;
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--fog);
  opacity: 0.8;
}

.page-about .registry__code {
  margin: 10px 0 14px;
  font-size: clamp(19px, 5vw, 25px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-about .registry__hint {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog);
}

.page-about .registry__contact {
  margin: 0;
  min-width: 0;
}

.page-about .registry__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-about .registry__row dt {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--fog);
  opacity: 0.78;
}

.page-about .registry__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-about .registry__row dd .mono {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-about .registry__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .registry__note {
  margin-top: 18px;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.76;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__stats .stat__value {
    font-size: 30px;
  }

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

  .page-about .cov-cell {
    padding: 20px 16px;
  }

  .page-about .registry__row {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 30px;
    padding-bottom: 58px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-origin__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

  .page-about .about-maintain__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-team__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .registry {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 44px;
  }

  .page-about .line {
    grid-template-columns: 44px minmax(0, 1fr);
    column-gap: 16px;
  }

  .page-about .tl {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
    border-left: none;
    padding-left: 0;
  }

  .page-about .tl__item {
    padding: 0 0 32px 18px;
    border-left: 1px solid rgba(251, 248, 241, 0.24);
  }

  .page-about .tl__item::before {
    left: -5px;
  }
}

@media (hover: hover) {
  .page-about .tl__note {
    opacity: 0.5;
  }

  .page-about .tl__item:hover .tl__note,
  .page-about .tl__item:focus-within .tl__note {
    opacity: 1;
    color: rgba(251, 248, 241, 0.88);
    border-left-color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .rail__link,
  .page-about .theme-card__link,
  .page-about .crew__summary::before,
  .page-about .tl__note {
    transition: none;
  }
}
<<<END>>>