.page-about {
  --about-rule: rgba(169, 123, 46, 0.42);
  --about-rail: 96px;
  --about-card-line: rgba(169, 123, 46, 0.5);
  --about-dim: rgba(244, 239, 228, 0.76);
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-crumbs {
  padding-block: 1.25rem 0.5rem;
}

.page-about .breadcrumb__item {
  display: inline;
}

/* ---------- Hero ---------- */

.page-about .about-hero {
  display: grid;
  gap: 36px;
  padding-block: 1.5rem 3.5rem;
}

.page-about .about-hero__index {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  font-size: clamp(2.35rem, 8.2vw, 4.75rem);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.035em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-card);
  background: var(--line-dark);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 20px;
  background: var(--ink-2);
}

.page-about .about-stat__value {
  order: -1;
  margin: 0;
  font-size: clamp(1.65rem, 6vw, 2.4rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--gold);
}

.page-about .about-stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--mist);
}

/* ---------- Banner ---------- */

.page-about .about-banner {
  margin: 0 auto 8px;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 20 / 9;
  object-fit: cover;
  border-radius: var(--radius-card);
  border: 1px solid var(--line-dark);
}

.page-about .about-banner__caption {
  display: block;
  margin-top: 12px;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- Chapter shell ---------- */

.page-about .about-chapter {
  padding-block: 3rem 3.25rem;
  border-top: 1px dashed var(--about-rule);
}

.page-about .about-chapter--last {
  padding-block-end: 3.75rem;
}

.page-about .about-chapter__inner {
  display: grid;
  gap: 18px;
}

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

.page-about .about-chapter__num {
  font-size: clamp(2.6rem, 11vw, 4.6rem);
  font-weight: 200;
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: rgba(232, 180, 74, 0.26);
}

.page-about .about-chapter__tag {
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-chapter__title {
  margin: 0 0 16px;
  font-size: clamp(1.4rem, 5.4vw, 2.15rem);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-chapter__body .prose p {
  margin: 0 0 1em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-dim);
}

.page-about .about-chapter__body .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-chapter__body .lede {
  margin: 0 0 8px;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--about-dim);
}

/* ---------- League chips ---------- */

.page-about .about-leagues {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 4px;
  padding: 0;
  list-style: none;
}

.page-about .about-leagues li {
  padding: 6px 14px;
  border: 1px solid var(--line-gold);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  background: var(--glass);
}

/* ---------- Detail cards ---------- */

.page-about .about-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-card {
  border: 1px solid var(--about-card-line);
  border-radius: var(--radius-card);
  background: var(--paper-2);
  color: var(--graphite);
  overflow: hidden;
}

.page-about .about-card__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  list-style: none;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.45;
}

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

.page-about .about-card__summary::marker {
  content: "";
}

.page-about .about-card__num {
  flex: none;
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--ink);
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0;
}

.page-about .about-card__title {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .about-card__hint {
  flex: none;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-card__hint::after {
  content: "展开";
}

.page-about .about-card[open] .about-card__hint::after {
  content: "收起";
}

.page-about .about-card__body {
  padding: 14px 18px 18px;
  border-top: 1px dashed rgba(169, 123, 46, 0.38);
}

.page-about .about-card__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(32, 48, 43, 0.84);
}

/* ---------- Method ---------- */

.page-about .about-method {
  display: grid;
  gap: 26px;
  margin-top: 6px;
}

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

.page-about .about-method__figure img,
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  border: 1px solid var(--line-dark);
  object-fit: cover;
}

.page-about .about-method__figure figcaption,
.page-about .about-team__figure figcaption {
  display: block;
  margin-top: 10px;
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-about .about-matrix {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-matrix__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--about-rule);
}

.page-about .about-matrix__key {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-matrix__val {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-dim);
}

/* ---------- Update rhythm ---------- */

.page-about .about-rhythm {
  position: relative;
  max-width: 760px;
  margin: 28px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  display: grid;
  gap: 26px;
}

.page-about .about-rhythm::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(232, 180, 74, 0.08));
}

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

.page-about .about-rhythm__dot {
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 180, 74, 0.14);
}

.page-about .about-rhythm__step {
  display: block;
  margin-bottom: 6px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-rhythm__title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

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

/* ---------- Team ---------- */

.page-about .about-team {
  display: grid;
  gap: 26px;
  margin-top: 4px;
}

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

.page-about .about-role {
  padding-left: 16px;
  border-left: 1px solid var(--line-gold);
}

.page-about .about-role__name {
  margin: 0 0 6px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold);
}

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

/* ---------- Milestones ---------- */

.page-about .about-miles {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 26px;
}

.page-about .about-miles__item {
  position: relative;
  padding-top: 22px;
  border-top: 1px dashed var(--about-rule);
}

.page-about .about-miles__item::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .about-miles__time {
  display: block;
  margin-bottom: 8px;
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-miles__title {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-miles__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--about-dim);
}

/* ---------- Next ---------- */

.page-about .about-next {
  padding-block: 3rem 4.25rem;
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(31, 92, 74, 0.55) 0%, rgba(11, 43, 35, 0) 62%),
    var(--ink-2);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-next__title {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 5vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-next__text {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-dim);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__links .btn {
  display: inline-flex;
  align-items: center;
}

/* ---------- Responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 22px 18px 24px;
  }

  .page-about .about-matrix__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
    padding: 16px 0;
  }

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

@media (min-width: 900px) {
  .page-about .about-crumbs {
    padding-block: 1.75rem 0.5rem;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
    gap: 52px;
    padding-block: 2rem 4.5rem;
  }

  .page-about .about-chapter {
    padding-block: 4rem 4.5rem;
  }

  .page-about .about-chapter__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-top: 4px;
  }

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

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 34px;
  }

  .page-about .about-miles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 22px;
  }

  .page-about .about-next {
    padding-block: 3.75rem 5rem;
  }
}

@media (min-width: 1180px) {
  .page-about .about-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-card:first-child {
    grid-column: span 2;
  }

  .page-about .about-banner {
    padding-inline: 0;
  }
}
<<<END>>>