.page-about {
  --about-shell: 1180px;
  --about-gap: clamp(20px, 3.2vw, 42px);
  padding-bottom: clamp(44px, 8vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(24px, 4.4vw, 60px) 0 clamp(30px, 5vw, 62px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  border-top: 1px solid var(--line);
  padding-top: clamp(22px, 3.4vw, 42px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8.2vw, 92px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--cream);
  margin: 10px 0 20px;
}

.page-about .about-hero__text {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.88;
  color: var(--silver);
  max-width: 62ch;
  margin: 0 0 14px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__plaque {
  align-self: start;
  display: flex;
  align-items: baseline;
  gap: 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  background: var(--ink-2);
  padding: 18px 22px;
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__plaque-num {
  font-family: var(--font-mono);
  font-size: clamp(46px, 9vw, 76px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: -0.04em;
}

.page-about .about-hero__plaque-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  line-height: 1.8;
  color: var(--silver-dim);
  text-transform: uppercase;
}

/* ---------- 01 业务说明 ---------- */
.page-about .about-craft__grid {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .about-craft__aside .section__title {
  margin-top: 12px;
}

.page-about .about-craft__body p {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--silver);
  margin: 0 0 18px;
}

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

/* ---------- 02 时间线 ---------- */
.page-about .about-history__figure {
  margin: 0 0 clamp(30px, 5vw, 54px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 24px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--gold-deep) 58%, rgba(201, 162, 39, 0) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 clamp(24px, 3.4vw, 36px) 34px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border: 2px solid var(--gold);
  background: var(--ink);
  transform: rotate(45deg);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 34px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 8px;
}

.page-about .about-timeline__name {
  font-family: var(--font-body);
  font-size: 19px;
  font-weight: 600;
  color: var(--cream);
  margin: 0 0 8px;
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver-dim);
  max-width: 66ch;
}

/* ---------- 03 团队铭牌 ---------- */
.page-about .about-crew__figure {
  margin: 0 0 clamp(26px, 4vw, 42px);
}

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

.page-about .about-crew__card {
  position: relative;
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--gold-deep);
  background: var(--ink-2);
  padding: 26px 24px 24px;
  transition: border-color 320ms var(--ease), transform 320ms var(--ease), box-shadow 320ms var(--ease);
}

.page-about .about-crew__card:hover,
.page-about .about-crew__card:focus-within {
  border-color: var(--gold);
  border-top-color: var(--gold-bright);
  transform: translateY(-4px);
  box-shadow: var(--shadow-gold);
}

.page-about .about-crew__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
  letter-spacing: -0.03em;
  margin-bottom: 10px;
}

.page-about .about-crew__name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  color: var(--cream);
  margin: 0 0 6px;
}

.page-about .about-crew__role {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-crew__detail {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

/* ---------- 04 专区与分级 ---------- */
.page-about .about-zones__list {
  list-style: none;
  margin: 0 0 clamp(36px, 5.6vw, 64px);
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-zones__item {
  display: grid;
  gap: 12px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-zones__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--gold-deep);
}

.page-about .about-zones__name {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 900;
  color: var(--cream);
  margin: 0 0 8px;
}

.page-about .about-zones__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver-dim);
  max-width: 62ch;
}

.page-about .about-tier {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--ink-2) 0%, var(--ink) 68%);
  padding: clamp(22px, 3.6vw, 42px);
  box-shadow: var(--shadow-hard);
}

.page-about .about-tier__chart {
  position: relative;
  justify-self: center;
  width: min(270px, 66vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: conic-gradient(
    var(--gold-bright) 0deg 19.5deg,
    var(--gold) 19.5deg 53.7deg,
    var(--gold-deep) 53.7deg 107.3deg,
    var(--crimson) 107.3deg 180.4deg,
    var(--silver) 180.4deg 267.9deg,
    var(--deco) 267.9deg 360deg
  );
}

.page-about .about-tier__chart-core {
  position: absolute;
  inset: 30%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
}

.page-about .about-tier__chart-core b {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
}

.page-about .about-tier__chart-core i {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--silver-dim);
}

.page-about .about-tier__legend-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  color: var(--cream);
  margin: 0 0 16px;
}

.page-about .about-tier__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.page-about .about-tier__row {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  align-items: baseline;
  gap: 4px 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  transition: background-color 260ms var(--ease);
}

.page-about .about-tier__row:hover {
  background: rgba(201, 162, 39, 0.06);
}

.page-about .about-tier__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  align-self: center;
}

.page-about .about-tier__dot--1 { background: var(--gold-bright); }
.page-about .about-tier__dot--2 { background: var(--gold); }
.page-about .about-tier__dot--3 { background: var(--gold-deep); }
.page-about .about-tier__dot--4 { background: var(--crimson); }
.page-about .about-tier__dot--5 { background: var(--silver); }
.page-about .about-tier__dot--6 { background: var(--deco); }

.page-about .about-tier__label {
  color: var(--cream);
  letter-spacing: 0.04em;
}

.page-about .about-tier__count {
  font-family: var(--font-mono);
  color: var(--gold);
}

.page-about .about-tier__freq {
  grid-column: 2 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--silver-dim);
}

/* ---------- 05 长期承诺 ---------- */
.page-about .about-steady__band {
  margin: 0 0 clamp(28px, 4.4vw, 46px);
}

.page-about .about-steady__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-steady__item {
  border-left: 2px solid var(--gold-deep);
  padding: 4px 0 4px 20px;
}

.page-about .about-steady__name {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 600;
  color: var(--cream);
  margin: 0 0 10px;
}

.page-about .about-steady__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--silver-dim);
}

/* ---------- 06 收束 ---------- */
.page-about .about-next__panel {
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  background: var(--ink-2);
  padding: clamp(26px, 4vw, 52px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-next__panel .section__title {
  margin-top: 10px;
  margin-bottom: 18px;
}

.page-about .about-next__text {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--silver);
  margin: 0 0 24px;
  max-width: 62ch;
}

.page-about .about-next__contact {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver-dim);
}

.page-about .about-next__contact a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-deep);
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-next__contact a:hover,
.page-about .about-next__contact a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(34px, 5vw, 64px);
  }

  .page-about .about-hero__plaque {
    align-self: end;
    justify-content: flex-start;
  }

  .page-about .about-craft__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 4.4vw, 60px);
    align-items: start;
  }

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

  .page-about .about-zones__item {
    grid-template-columns: 74px minmax(0, 1fr);
    align-items: start;
    gap: 22px;
    padding: 26px 0;
  }

  .page-about .about-zones__item:nth-child(even) {
    padding-left: clamp(0px, 3vw, 40px);
  }

  .page-about .about-tier {
    grid-template-columns: minmax(0, 4fr) minmax(0, 5fr);
  }

  .page-about .about-tier__row {
    grid-template-columns: 14px 1fr auto auto;
    gap: 0 16px;
  }

  .page-about .about-tier__freq {
    grid-column: auto;
    text-align: right;
  }

  .page-about .about-steady__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 0 30px;
    padding-left: 40px;
  }

  .page-about .about-timeline__year {
    font-size: 38px;
    margin-bottom: 0;
    text-align: right;
  }

  .page-about .about-timeline__name {
    margin-top: 2px;
  }

  .page-about .about-zones__list {
    margin-bottom: clamp(46px, 6vw, 78px);
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew__card,
  .page-about .about-tier__row,
  .page-about .about-next__contact a {
    transition: none;
  }

  .page-about .about-crew__card:hover,
  .page-about .about-crew__card:focus-within {
    transform: none;
  }
}
<<<END>>>