.page-about {
  --about-shadow-hard: 8px 8px 0 var(--ink-green);
  --about-hairline: 1px solid var(--mist);
  padding-bottom: 3.5rem;
}

.page-about .crumbs {
  margin-top: 1.25rem;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  display: grid;
  gap: 2rem;
  padding: 1.5rem 0 3.25rem;
  align-items: start;
}

.page-about .about-kicker {
  display: inline-block;
  margin: 0 0 1.1rem;
  padding: 0.32rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--ink-green);
  background: var(--gold-pale);
  border-left: 4px solid var(--gold);
}

.page-about .about-hero h1 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 5.4vw, 3.2rem);
  line-height: 1.2;
  letter-spacing: 0.03em;
  color: var(--ink-green);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 0 0 1.75rem;
  max-width: 34em;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero__panel {
  padding: 1.35rem 1.2rem 1.25rem;
  background: var(--ink-green);
  color: var(--ivory);
  border: 2px solid var(--gold);
  box-shadow: 8px 8px 0 var(--gold);
}

.page-about .about-hero__panel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.26em;
  color: var(--gold);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  margin: 1rem 0 1rem;
  padding: 0;
  list-style: none;
}

.page-about .about-stats li {
  padding-top: 0.55rem;
  border-top: 1px solid rgba(246, 241, 231, 0.28);
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gold);
  border-bottom: 2px solid var(--gold);
}

.page-about .about-stats__unit {
  margin-left: 0.18rem;
  font-size: 0.8rem;
  color: var(--gold-pale);
}

.page-about .about-stats__cap {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.78rem;
  line-height: 1.55;
  color: rgba(246, 241, 231, 0.82);
}

.page-about .about-hero__panel-foot {
  margin: 0;
  padding-top: 0.85rem;
  border-top: 1px solid rgba(212, 175, 55, 0.4);
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--gold-pale);
}

/* ============ 通用版块标题 ============ */
.page-about .about-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding-bottom: 1rem;
  margin-bottom: 1.75rem;
  border-bottom: 2px solid var(--gold);
}

.page-about .about-head__num {
  padding-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--gold-dark);
}

.page-about .about-head h2 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.8vw, 1.95rem);
  line-height: 1.35;
  letter-spacing: 0.03em;
  color: var(--ink-green);
  text-wrap: balance;
}

.page-about .about-head__lede {
  margin: 0;
  max-width: 46em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

/* ============ 01 为什么 ============ */
.page-about .about-why {
  padding: 1rem 0 0;
}

.page-about .about-pains {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: pain;
}

.page-about .about-pains li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1.15rem 1.1rem 1.2rem;
  background: var(--ivory-hi);
  border-left: 4px solid var(--slate-teal);
}

.page-about .about-pains__num {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-teal);
  padding-top: 0.15rem;
}

.page-about .about-pains h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.45;
  color: var(--ink-green);
}

.page-about .about-pains p {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-pains__fix {
  margin: 0;
  padding: 0.55rem 0.7rem;
  background: var(--gold-pale);
  border-left: 2px solid var(--gold);
  font-size: 0.9rem !important;
  line-height: 1.75 !important;
  color: var(--ink-green) !important;
}

/* ============ 02 原则 ============ */
.page-about .about-principles {
  margin-top: 3.5rem;
  padding: 2.5rem 0 3rem;
  background: var(--ivory-hi);
  border-top: 2px solid var(--ink-green);
  border-bottom: 2px solid var(--ink-green);
}

.page-about .about-principles__band {
  margin: 0 0 2rem;
}

.page-about .about-principles .figure-cap {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--gold-dark);
}

.page-about .about-principles__list {
  display: grid;
  gap: 1.15rem;
}

.page-about .about-principle {
  padding: 1.2rem 1.15rem 1.3rem;
  background: var(--ivory);
  border-color: var(--ink-green);
  border-style: solid;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.page-about .about-principle--strong {
  border-width: 4px;
  box-shadow: 8px 8px 0 var(--ink-green);
}

.page-about .about-principle--mid {
  border-width: 2px;
  box-shadow: 5px 5px 0 rgba(14, 59, 46, 0.5);
}

.page-about .about-principle--light {
  border-width: 1px;
  box-shadow: none;
}

.page-about .about-principle:hover,
.page-about .about-principle:focus-within {
  transform: translateY(-2px);
}

.page-about .about-principle__tag {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--cinnabar);
}

.page-about .about-principle h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.08em;
  color: var(--ink-green);
}

.page-about .about-principle p {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-principle__how {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin: 0 !important;
  padding: 0 0.7rem;
  border-left: 2px solid var(--gold);
  font-size: 0.9rem !important;
  line-height: 1.75 !important;
  color: var(--ink-green) !important;
  transition: max-height 200ms ease, opacity 200ms ease, padding 200ms ease;
}

.page-about .about-principle:hover .about-principle__how,
.page-about .about-principle:focus-within .about-principle__how {
  max-height: 12rem;
  opacity: 1;
  padding: 0.55rem 0.7rem;
}

.page-about .about-principle__link {
  margin: 0 !important;
  font-size: 0.85rem !important;
}

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

.page-about .about-principle__link a:hover {
  color: var(--ink-green);
}

.page-about .about-principles__compare {
  margin: 2.25rem 0 0;
}

/* ============ 03 分工 ============ */
.page-about .about-team {
  padding: 3.25rem 0 0;
}

.page-about .about-team__bar {
  display: flex;
  gap: 4px;
  height: 14px;
  margin: 0 0 1.5rem;
}

.page-about .about-team__bar span {
  display: block;
  height: 100%;
}

.page-about .about-team__bar span:nth-child(1) {
  flex: 5;
  background: var(--ink-green);
}

.page-about .about-team__bar span:nth-child(2) {
  flex: 4;
  background: var(--slate-teal);
}

.page-about .about-team__bar span:nth-child(3) {
  flex: 3;
  background: var(--gold);
}

.page-about .about-team__grid {
  display: grid;
  gap: 1rem;
}

.page-about .about-team__item {
  padding: 1.15rem 1.1rem 1.2rem;
  background: var(--ivory-hi);
  border: 2px solid var(--ink-green);
  border-top-width: 6px;
}

.page-about .about-team__item--a {
  border-top-color: var(--ink-green);
}

.page-about .about-team__item--b {
  border-top-color: var(--slate-teal);
}

.page-about .about-team__item--c {
  border-top-color: var(--gold);
}

.page-about .about-team__count {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-green);
}

.page-about .about-team__count span {
  margin-left: 0.15rem;
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--gold-dark);
}

.page-about .about-team__item h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--ink-green);
}

.page-about .about-team__item p {
  margin: 0 0 0.6rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-team__hand {
  margin: 0 !important;
  padding-top: 0.55rem;
  border-top: 1px dashed var(--mist);
  font-family: var(--font-mono);
  font-size: 0.76rem !important;
  letter-spacing: 0.04em;
  color: var(--gold-dark) !important;
}

/* ============ 04 时间线 ============ */
.page-about .about-path {
  margin-top: 3.5rem;
  padding: 3rem 0 3.25rem;
  background: var(--ink-green);
  color: var(--ivory);
  border-top: 6px solid var(--gold);
}

.page-about .about-path__inner {
  display: grid;
  gap: 1.75rem;
}

.page-about .about-head--dark {
  grid-column: 1 / -1;
}

.page-about .about-head--dark h2 {
  color: var(--ivory);
}

.page-about .about-head--dark .about-head__num {
  color: var(--gold);
}

.page-about .about-head--dark .about-head__lede {
  color: rgba(246, 241, 231, 0.84);
}

.page-about .about-years ul {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.4rem;
  list-style: none;
  overflow-x: auto;
}

.page-about .about-years a {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--gold);
  text-decoration: none;
  border: 1px solid rgba(212, 175, 55, 0.5);
  white-space: nowrap;
  transition: background 120ms ease, color 120ms ease;
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  background: var(--gold);
  color: var(--ink-green);
}

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

.page-about .about-path__figure {
  margin: 0 0 1.75rem;
}

.page-about .about-nodes {
  position: relative;
  display: grid;
  gap: 1.6rem;
  margin: 0;
  padding: 0 0 0 1.35rem;
  list-style: none;
}

.page-about .about-nodes::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(var(--gold), rgba(212, 175, 55, 0.18));
}

.page-about .about-node {
  position: relative;
  scroll-margin-top: 7rem;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: calc(-1.35rem + 0.5px);
  top: 0.55rem;
  width: 11px;
  height: 11px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .about-node__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-node__body h3 {
  margin: 0.25rem 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  color: var(--ivory);
}

.page-about .about-node__body p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(246, 241, 231, 0.82);
}

.page-about .about-path__more {
  margin: 1.75rem 0 0;
  padding-left: 1.35rem;
  font-size: 0.9rem;
}

.page-about .about-path__more a {
  color: var(--gold);
  text-decoration: underline;
  text-decoration-color: rgba(212, 175, 55, 0.6);
  text-underline-offset: 4px;
}

.page-about .about-path__more a:hover {
  color: var(--gold-pale);
}

/* ============ 05 纠错流程 ============ */
.page-about .about-fix {
  padding: 3.25rem 0 0;
}

.page-about .about-fix__steps {
  display: grid;
  gap: 0.75rem;
}

.page-about .about-step {
  background: var(--ivory-hi);
  border: 2px solid var(--ink-green);
  border-left-width: 6px;
  border-left-color: var(--gold);
}

.page-about .about-step summary {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--gold-dark);
}

.page-about .about-step[open] summary::after {
  content: "–";
  color: var(--cinnabar);
}

.page-about .about-step__num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
}

.page-about .about-step__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
  color: var(--ink-green);
}

.page-about .about-step p {
  margin: 0;
  padding: 0 1rem 1rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-fix__note {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ============ 06 更在意什么 ============ */
.page-about .about-care {
  padding: 3.25rem 0 0;
}

.page-about .about-care__list {
  display: grid;
  gap: 1.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-care__item {
  padding-left: 1rem;
  border-left: 2px solid var(--gold);
}

.page-about .about-care__item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.45;
  color: var(--ink-green);
}

.page-about .about-care__item p {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-sub {
  border: 1px solid var(--mist);
  background: var(--ivory-hi);
}

.page-about .about-sub summary {
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  color: var(--link);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-sub summary::before {
  content: "›";
  margin-right: 0.4rem;
  color: var(--gold-dark);
}

.page-about .about-sub[open] summary::before {
  content: "⌄";
}

.page-about .about-sub__body {
  margin: 0 !important;
  padding: 0 0.75rem 0.7rem;
  font-size: 0.87rem !important;
  line-height: 1.75 !important;
  color: var(--gold-dark) !important;
}

.page-about .about-care__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--gold);
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-about .about-pains li {
    padding: 1.3rem 1.4rem 1.35rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-fix__steps {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-care__list {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 1.75rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 3rem;
    padding: 2rem 0 4rem;
  }

  .page-about .about-hero__panel {
    margin-top: 0.5rem;
  }

  .page-about .about-head {
    grid-template-columns: 3.25rem minmax(0, 1fr);
    gap: 1.1rem;
  }

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

  .page-about .about-pains li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.35rem;
  }

  .page-about .about-pains li:nth-child(2) {
    margin-top: 1.75rem;
  }

  .page-about .about-pains li:nth-child(3) {
    margin-top: 3.5rem;
  }

  .page-about .about-principles__list {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.35rem;
  }

  .page-about .about-principle:nth-child(2) {
    margin-left: 1.75rem;
  }

  .page-about .about-principle:nth-child(3) {
    margin-left: 3.5rem;
  }

  .page-about .about-team__grid {
    grid-template-columns: 5fr 4fr 3fr;
    gap: 1.25rem;
    align-items: start;
  }

  .page-about .about-team__item--b {
    margin-top: 1.25rem;
  }

  .page-about .about-team__item--c {
    margin-top: 2.5rem;
  }

  .page-about .about-path__inner {
    grid-template-columns: 8rem minmax(0, 1fr);
    column-gap: 2.5rem;
    row-gap: 1.5rem;
    align-items: start;
  }

  .page-about .about-years {
    position: sticky;
    top: 6.5rem;
    padding-top: 1rem;
  }

  .page-about .about-years ul {
    flex-direction: column;
    gap: 0.3rem;
    overflow: visible;
  }

  .page-about .about-years a {
    display: block;
    padding: 0.4rem 0.55rem;
    border: 0;
    border-left: 2px solid rgba(212, 175, 55, 0.4);
  }

  .page-about .about-years a:hover,
  .page-about .about-years a:focus-visible {
    background: rgba(212, 175, 55, 0.16);
    color: var(--gold-pale);
    border-left-color: var(--gold);
  }

  .page-about .about-fix__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.7rem;
  }

  .page-about .about-step {
    border-left-width: 2px;
    border-top-width: 5px;
    border-top-color: var(--gold);
  }

  .page-about .about-step summary {
    flex-direction: column;
    gap: 0.25rem;
    padding: 0.85rem 0.85rem 0.75rem;
  }

  .page-about .about-step summary::after {
    position: absolute;
    top: 0.7rem;
    right: 0.7rem;
  }

  .page-about .about-step {
    position: relative;
  }

  .page-about .about-step p {
    padding: 0 0.85rem 0.9rem;
    font-size: 0.88rem;
  }

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

@media (min-width: 1100px) {
  .page-about .about-principles__list {
    grid-template-columns: 5fr 4fr 3fr;
    gap: 1.25rem;
    align-items: start;
  }

  .page-about .about-principle:nth-child(2) {
    margin-left: 0;
    margin-top: 1.5rem;
  }

  .page-about .about-principle:nth-child(3) {
    margin-left: 0;
    margin-top: 3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-principle,
  .page-about .about-principle__how,
  .page-about .about-years a {
    transition: opacity 160ms ease;
    transform: none !important;
  }
}
<<<END>>>