.page-about {
  --about-line-dark: rgba(217, 195, 160, 0.16);
  --about-line-light: #C9BCA6;
  --about-body: #2C3A4E;
  --about-muted: #5F6B79;
  --about-gap: clamp(18px, 3vw, 28px);
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

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

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.page-about .about-sec {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-sec--ink {
  background-color: var(--ink);
  color: var(--paper);
}

.page-about .about-sec--paper {
  background-color: var(--paper);
  background-image: repeating-linear-gradient(
    0deg,
    rgba(201, 188, 166, 0.22) 0,
    rgba(201, 188, 166, 0.22) 1px,
    transparent 1px,
    transparent 72px
  );
  color: var(--ink);
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.page-about .about-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cinnabar);
}

.page-about .about-sec--ink .about-kicker {
  color: var(--gold);
}

.page-about .about-sec__head {
  max-width: 56ch;
}

.page-about .about-sec__intro {
  margin: 14px 0 0;
  max-width: 50ch;
  font-size: 15.5px;
  line-height: 1.9;
}

.page-about .about-sec--ink .about-sec__intro {
  color: var(--sand);
}

.page-about .about-sec--paper .about-sec__intro {
  color: var(--about-body);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(217, 195, 160, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(217, 195, 160, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  border-bottom: 1px solid var(--about-line-dark);
}

.page-about .breadcrumb {
  padding-top: 22px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  padding-block: 26px 38px;
}

.page-about .about-eyebrow {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-title {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(29px, 5.4vw, 52px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 20px 0 0;
  max-width: 40ch;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--sand);
}

.page-about .about-links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--about-line-dark);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-links a:hover,
.page-about .about-links a:focus-visible {
  color: var(--jade);
  padding-left: 8px;
}

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

.page-about .about-links a span {
  color: var(--gold);
}

.page-about .about-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background-color: var(--about-line-dark);
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-stats__item {
  background-color: var(--ink);
  padding: 16px 14px 18px;
}

.page-about .about-stats__item b {
  display: block;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gold);
  border-bottom: 1px solid rgba(201, 162, 39, 0.38);
  padding-bottom: 4px;
}

.page-about .about-stats__item span {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--smoke);
}

.page-about .about-banner {
  margin: 0;
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: clamp(150px, 26vw, 290px);
  object-fit: cover;
  object-position: center;
}

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

.page-about .about-split__main p {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--about-body);
}

.page-about .about-note {
  border: 1px solid var(--about-line-light);
  border-left: 2px solid var(--moss);
  background-color: var(--paper-2);
  padding: 22px 20px;
}

.page-about .about-note h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-note__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-note__list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--about-line-light);
}

.page-about .about-note__list li:first-child {
  padding-top: 0;
  border-top: none;
}

.page-about .about-note__list .mono {
  font-size: 12px;
  color: var(--cinnabar);
  letter-spacing: 0.06em;
}

.page-about .about-note__list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-note__list strong {
  color: var(--ink);
}

/* 时间线 */
.page-about .about-timeline {
  display: grid;
  gap: 22px;
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-track__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-track__list li {
  flex: 0 0 auto;
}

.page-about .about-track__list a {
  display: block;
  padding: 7px 12px;
  border: 1px solid var(--about-line-dark);
  color: var(--smoke);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-track__list a:hover,
.page-about .about-track__list a:focus-visible {
  color: var(--paper);
  border-color: var(--jade);
  outline: none;
}

.page-about .about-track__list a .mono {
  color: var(--gold);
  margin-right: 4px;
}

.page-about .about-stage {
  border-top: 1px solid var(--about-line-dark);
  padding: 20px 0 24px;
  scroll-margin-top: 92px;
}

.page-about .about-stage:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .about-stage:target {
  background-image: linear-gradient(90deg, rgba(79, 209, 197, 0.1), transparent 72%);
  border-left: 2px solid var(--jade);
  padding-left: 14px;
}

.page-about .about-stage__meta {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .about-stage__year {
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
  border-bottom: 1px solid rgba(201, 162, 39, 0.38);
  padding-bottom: 2px;
}

.page-about .about-stage h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-stage p {
  margin: 12px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--sand);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 40px);
}

.page-about .about-team__card {
  position: relative;
  border: 1px solid var(--about-line-light);
  background-color: var(--paper-2);
  padding: 22px 20px 24px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 18px;
  width: 0;
  height: 2px;
  background-color: var(--jade);
  transition: width var(--dur) var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within,
.page-about .about-team__card:focus {
  border-color: var(--jade);
  outline: none;
}

.page-about .about-team__card:hover::before,
.page-about .about-team__card:focus-within::before,
.page-about .about-team__card:focus::before {
  width: 24px;
}

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

.page-about .about-team__tag {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--moss);
  border: 1px solid var(--moss);
  padding: 2px 8px;
}

.page-about .about-team__card h3 {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  color: var(--ink);
}

.page-about .about-team__card p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-team__more {
  padding-top: 12px;
  border-top: 1px solid var(--about-line-light);
  color: var(--about-muted) !important;
  font-size: 13.5px !important;
}

.page-about .about-figure {
  margin: clamp(28px, 4vw, 40px) 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-line-light);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-muted);
}

/* 术语与流程 */
.page-about .about-flow {
  display: grid;
  gap: 26px;
  margin-top: clamp(28px, 4vw, 42px);
}

.page-about .about-flow__chart {
  border: 1px solid var(--about-line-dark);
  background-color: var(--ink-2);
  padding: 16px;
}

.page-about .about-flow__chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-flow__chart text {
  font-family: var(--font-sans);
}

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

.page-about .about-flow__steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-line-dark);
}

.page-about .about-flow__steps li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-flow__steps .mono {
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .about-flow__steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--sand);
}

.page-about .about-flow__steps strong {
  color: var(--paper);
}

.page-about .about-glossary {
  display: grid;
  gap: 26px;
  margin-top: clamp(30px, 4.5vw, 48px);
  padding-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid var(--about-line-dark);
}

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

.page-about .about-glossary__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--about-line-dark);
}

.page-about .about-glossary__figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--smoke);
}

.page-about .about-glossary__body h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-glossary__body p {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--sand);
}

.page-about .about-textlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding-bottom: 3px;
  color: var(--jade);
  font-size: 14.5px;
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 209, 197, 0.5);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-textlink:hover,
.page-about .about-textlink:focus-visible {
  color: var(--cinnabar-soft);
  border-color: var(--cinnabar-soft);
  outline: none;
}

/* 理由 */
.page-about .about-reasons {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--about-line-light);
  border: 1px solid var(--about-line-light);
}

.page-about .about-reasons li {
  background-color: var(--paper);
  padding: 22px 20px 24px;
}

.page-about .about-reasons__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cinnabar);
  border-bottom: 1px solid rgba(194, 64, 46, 0.4);
  padding-bottom: 2px;
}

.page-about .about-reasons h3 {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 19px;
  color: var(--ink);
}

.page-about .about-reasons p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-muted);
}

/* 联系 */
.page-about .about-contact {
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-contact__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-contact__lead h2 {
  color: var(--paper);
}

.page-about .about-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
  padding: 12px 22px;
  background-color: var(--cinnabar);
  border: 1px solid var(--cinnabar);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-cta:hover,
.page-about .about-cta:focus-visible {
  background-color: var(--cinnabar-deep);
  border-color: var(--cinnabar-soft);
  outline: none;
}

.page-about .about-cta:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 3px;
}

.page-about .about-contact__list {
  margin: 0;
  display: grid;
  border-top: 1px solid var(--about-line-dark);
}

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-line-dark);
}

.page-about .about-contact__row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--smoke);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* 桌面 */
@media (min-width: 768px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stats__item {
    padding: 20px 18px 22px;
  }

  .page-about .about-stats__item b {
    font-size: 28px;
  }

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

  .page-about .about-team__card:nth-child(2) {
    margin-top: 34px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 14px;
  }

  .page-about .about-reasons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-reasons li {
    padding: 26px 24px 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    align-items: end;
    gap: 44px;
    padding-block: 34px 46px;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-timeline {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-track {
    position: sticky;
    top: 84px;
    align-self: start;
  }

  .page-about .about-track__list {
    display: block;
    overflow: visible;
    padding: 2px 0 2px 20px;
    position: relative;
    scrollbar-width: none;
  }

  .page-about .about-track__list::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background-color: rgba(201, 162, 39, 0.38);
  }

  .page-about .about-track__list li {
    flex: none;
  }

  .page-about .about-track__list a {
    position: relative;
    padding: 9px 0;
    border: none;
    font-size: 13.5px;
  }

  .page-about .about-track__list a::before {
    content: "";
    position: absolute;
    left: -20px;
    top: 15px;
    width: 9px;
    height: 9px;
    background-color: var(--ink);
    border: 1px solid var(--gold);
    transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }

  .page-about .about-track__list a:hover,
  .page-about .about-track__list a:focus-visible {
    color: var(--paper);
  }

  .page-about .about-track__list a:hover::before,
  .page-about .about-track__list a:focus-visible::before {
    background-color: var(--cinnabar);
    border-color: var(--cinnabar);
  }

  .page-about .about-track__list a:focus-visible {
    outline: 2px solid var(--jade);
    outline-offset: 4px;
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(28px, 4vw, 48px);
    align-items: center;
  }

  .page-about .about-glossary {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: center;
  }

  .page-about .about-contact__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-links a,
  .page-about .about-team__card,
  .page-about .about-team__card::before,
  .page-about .about-track__list a,
  .page-about .about-track__list a::before,
  .page-about .about-cta,
  .page-about .about-textlink {
    transition: none;
  }

  .page-about .about-links a:hover,
  .page-about .about-links a:focus-visible {
    padding-left: 2px;
  }
}
<<<END>>>