.page-about {
  --about-line: rgba(143, 185, 198, 0.24);
  --about-line-soft: rgba(143, 185, 198, 0.14);
  --about-card: #12294A;
  --about-pad: 20px;
  background: var(--space);
  color: var(--cream);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: 8px;
}

.page-about .about-crumbs {
  width: var(--shell);
  margin-inline: auto;
  padding-top: 22px;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-about .breadcrumbs li {
  color: var(--mist);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(143, 185, 198, 0.5);
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumbs li[aria-current="page"] {
  color: var(--cream);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  gap: 28px;
  padding-block: 26px 44px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 9.4vw, 82px);
  line-height: 0.94;
  letter-spacing: 0.005em;
  margin: 14px 0 18px;
  max-width: 12em;
}

.page-about .about-hero .lede {
  color: var(--cream-soft);
  font-size: 16px;
  line-height: 1.78;
  max-width: 34em;
  margin: 0;
}

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

.page-about .hero-stat {
  background: var(--space);
  padding: 14px 10px 13px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-stat .mono {
  font-family: var(--font-mono);
  font-size: clamp(24px, 6vw, 36px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .hero-stat__unit {
  font-size: 0.42em;
  margin-left: 2px;
  color: var(--mist);
}

.page-about .hero-stat__label {
  font-size: 11.5px;
  line-height: 1.45;
  color: var(--mist);
}

.page-about .about-hero__figure {
  margin: 0;
  background: linear-gradient(145deg, var(--space-2), var(--violet));
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
}

.page-about .about-hero__figure .figure__media {
  display: block;
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

.page-about .figure__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  color: var(--mist);
  letter-spacing: 0.01em;
}

/* ---------- 起笔双栏 ---------- */

.page-about .about-lead {
  width: var(--shell);
  margin-inline: auto;
  display: grid;
  gap: 30px;
  padding-block: 38px;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-lead h2,
.page-about .about-section-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 6.4vw, 48px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  margin: 10px 0 16px;
}

.page-about .about-lead__main p {
  color: var(--cream-soft);
  font-size: 16px;
  line-height: 1.82;
  margin: 0 0 16px;
  max-width: 34em;
}

.page-about .about-lead__main .btn {
  margin-top: 8px;
}

.page-about .about-rail {
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: var(--r-m);
  padding: 22px 20px;
  align-self: start;
}

.page-about .about-rail__title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  counter-reset: rail;
}

.page-about .about-rail__list li {
  counter-increment: rail;
  border-bottom: 1px dashed var(--about-line-soft);
}

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

.page-about .about-rail__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  color: var(--cream-soft);
  text-decoration: none;
  font-size: 14px;
  transition: color 180ms ease, transform 180ms ease;
}

.page-about .about-rail__list a::before {
  content: counter(rail, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--cyan);
  transform: translateX(3px);
}

.page-about .about-rail__stats {
  display: grid;
  gap: 12px;
  padding: 16px 0 18px;
  border-top: 1px solid var(--about-line);
}

.page-about .rail-stat {
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.page-about .rail-stat .mono {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--orange);
  min-width: 3.2em;
}

.page-about .rail-stat__unit {
  font-size: 0.45em;
  margin-left: 1px;
  color: var(--mist);
}

.page-about .rail-stat p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--cream-soft);
}

.page-about .about-rail__links {
  display: grid;
  gap: 8px;
}

.page-about .about-rail__links .btn {
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ---------- 通用 section ---------- */

.page-about .section {
  width: var(--shell);
  margin-inline: auto;
  padding-block: 40px;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-section-head {
  max-width: 40em;
}

.page-about .about-section-head .eyebrow {
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0;
}

.page-about .about-section-head .lede {
  color: var(--cream-soft);
  font-size: 15.5px;
  line-height: 1.8;
  margin: 0;
}

/* ---------- Bento 日常 ---------- */

.page-about .about-bento {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.page-about .cover-card {
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: var(--r-m);
  padding: 20px 18px;
  position: relative;
  overflow: hidden;
}

.page-about .cover-card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.16;
  letter-spacing: 0.01em;
  margin: 0 0 10px;
}

.page-about .cover-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--cream-soft);
}

.page-about .cover-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(44px, 12vw, 68px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .cover-card--big {
  background:
    linear-gradient(160deg, rgba(178, 58, 138, 0.16), transparent 62%),
    var(--about-card);
  border-left: 3px solid var(--orange);
}

.page-about .cover-card--big h3 {
  font-size: clamp(22px, 5.6vw, 30px);
}

.page-about .cover-card--beat {
  background: linear-gradient(200deg, rgba(61, 225, 214, 0.10), transparent 70%), var(--about-card);
}

.page-about .beat-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
}

.page-about .beat-list li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px dashed var(--about-line-soft);
  font-size: 13.5px;
  color: var(--cream-soft);
}

.page-about .beat-list li:last-child {
  border-bottom: 0;
}

.page-about .beat-list .mono {
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--cyan);
  min-width: 2.4em;
}

.page-about .cover-card--beat p {
  padding-top: 10px;
  border-top: 1px solid var(--about-line-soft);
  font-size: 13.5px;
}

.page-about .panel-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.page-about .panel-facts span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--space);
  background: var(--cyan);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  position: relative;
  margin-top: 26px;
  padding-left: 26px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(178, 58, 138, 0.75), var(--violet));
}

.page-about .tl-node {
  position: relative;
  background: var(--about-card);
  border: 1px solid var(--about-line);
  border-radius: var(--r-m);
  margin-bottom: 12px;
  overflow: visible;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--space-2);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(61, 225, 214, 0.12);
  transition: background 200ms ease, box-shadow 200ms ease;
}

.page-about .tl-node[open]::before {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(61, 225, 214, 0.18);
}

.page-about .tl-node summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 44px 16px 16px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.page-about .tl-node__year {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .tl-node__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--cream);
}

.page-about .tl-node__toggle {
  position: absolute;
  right: 16px;
  top: 14px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border: 1px solid var(--about-line);
  border-radius: var(--r-s);
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
}

.page-about .tl-node__toggle::before {
  content: "+";
}

.page-about .tl-node[open] .tl-node__toggle::before {
  content: "–";
}

.page-about .tl-node__body {
  margin: 0 16px;
  padding: 14px 0 18px;
  border-top: 1px dashed var(--about-line-soft);
}

.page-about .tl-node__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--cream-soft);
}

.page-about .tl-node summary:hover .tl-node__title,
.page-about .tl-node summary:focus-visible .tl-node__title {
  color: var(--cyan);
}

/* ---------- 引文 ---------- */

.page-about .about-quote {
  width: var(--shell);
  margin-inline: auto;
  padding-block: 34px;
}

.page-about .about-quote blockquote {
  margin: 0;
  padding: 26px 22px 22px;
  border-radius: var(--r-m);
  border-left: 4px solid var(--orange);
  background: var(--cream);
  color: var(--ink);
  position: relative;
}

.page-about .about-quote blockquote p {
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(17px, 4.4vw, 23px);
  line-height: 1.66;
  margin: 0 0 14px;
}

.page-about .about-quote cite {
  display: block;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: rgba(33, 26, 22, 0.6);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

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

.page-about .about-team__figure .figure__media {
  display: block;
  overflow: hidden;
  border-radius: var(--r-m);
  background: linear-gradient(150deg, var(--space-2), var(--violet));
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 2%, 100% 100%, 0 98%);
}

.page-about .team-roles {
  display: grid;
  gap: 0;
}

.page-about .role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--about-line-soft);
}

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

.page-about .role__num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 0.9;
  color: var(--orange);
  letter-spacing: -0.04em;
}

.page-about .role h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  margin: 0 0 6px;
}

.page-about .role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cream-soft);
}

/* ---------- 社群 ---------- */

.page-about .about-community__figure {
  margin: 26px 0 0;
  background: linear-gradient(115deg, var(--space-2), var(--magenta));
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .about-community__figure .figure__media {
  display: block;
  overflow: hidden;
}

.page-about .about-community__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  opacity: 0.92;
}

.page-about .community-grid {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

.page-about .community-grid article {
  padding-top: 14px;
  border-top: 2px solid var(--cyan);
}

.page-about .community-grid article:nth-child(2) {
  border-top-color: var(--orange);
}

.page-about .community-grid article:nth-child(3) {
  border-top-color: var(--magenta);
}

.page-about .community-grid h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.01em;
  margin: 0 0 8px;
}

.page-about .community-grid p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cream-soft);
}

/* ---------- 留存数据 ---------- */

.page-about .why-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: rgba(33, 26, 22, 0.16);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .why-stat {
  background: var(--cream);
  color: var(--ink);
  padding: 18px 16px 16px;
}

.page-about .why-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 8vw, 44px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .why-stat__unit {
  font-size: 0.42em;
  margin-left: 2px;
  color: var(--orange);
}

.page-about .why-stat p {
  margin: 8px 0 3px;
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1.4;
}

.page-about .why-stat small {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  color: rgba(33, 26, 22, 0.62);
}

.page-about .why-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .why-list li {
  padding-left: 14px;
  border-left: 2px solid var(--about-line);
}

.page-about .why-list li:nth-child(odd) {
  border-left-color: rgba(255, 122, 26, 0.6);
}

.page-about .why-list h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.01em;
  margin: 0 0 7px;
}

.page-about .why-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--cream-soft);
}

/* ---------- 结尾入口 ---------- */

.page-about .about-cta {
  width: var(--shell);
  margin-inline: auto;
  padding-block: 36px 52px;
}

.page-about .about-cta__box {
  background:
    linear-gradient(125deg, rgba(178, 58, 138, 0.22), transparent 58%),
    linear-gradient(160deg, var(--space-2), #1b1836 70%, var(--violet));
  border: 1px solid var(--about-line);
  border-radius: var(--r-m);
  padding: 26px 20px;
}

.page-about .about-cta__box h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 6.2vw, 42px);
  line-height: 1.04;
  margin: 0 0 14px;
}

.page-about .about-cta__box p {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--cream-soft);
  max-width: 40em;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: center;
    gap: 32px;
    padding-block: 34px 52px;
  }

  .page-about .about-hero__figure {
    align-self: stretch;
  }

  .page-about .about-hero__figure img {
    aspect-ratio: 3 / 2.2;
    height: 100%;
  }

  .page-about .about-bento {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .cover-card {
    padding: 22px 20px;
  }

  .page-about .cover-card--big {
    grid-column: span 3;
    grid-row: span 2;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
  }

  .page-about .cover-card--beat {
    grid-column: span 3;
  }

  .page-about .cover-card--odd {
    grid-column: span 3;
  }

  .page-about .cover-card--wide {
    grid-column: span 6;
  }

  .page-about .community-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

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

  .page-about .why-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }

  .page-about .about-quote blockquote {
    padding: 32px 30px 26px;
  }
}

@media (min-width: 960px) {
  .page-about .about-lead {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 56px;
    padding-block: 48px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .section {
    padding-block: 54px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .timeline {
    padding-left: 34px;
  }

  .page-about .timeline::before {
    left: 8px;
  }

  .page-about .tl-node::before {
    left: -30px;
  }

  .page-about .tl-node summary {
    padding: 18px 52px 18px 22px;
  }

  .page-about .tl-node__body {
    margin: 0 22px;
  }

  .page-about .tl-node__title {
    font-size: 20px;
  }

  .page-about .about-cta__box {
    padding: 36px 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__list a,
  .page-about .breadcrumbs a,
  .page-about .tl-node::before {
    transition: none;
  }
}
<<<END>>>