.page-about {
  --about-rail: 176px;
  --about-glow: radial-gradient(circle at 62% 38%, rgba(242, 193, 78, 0.16), rgba(51, 225, 208, 0.06) 46%, transparent 72%);
}

/* ---------- 首屏 ---------- */
.page-about .about-lede {
  position: relative;
  padding: clamp(24px, 4.4vw, 56px) 0 clamp(20px, 3.2vw, 38px);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-lede::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -14%;
  width: clamp(240px, 42vw, 540px);
  height: clamp(240px, 42vw, 540px);
  background: var(--about-glow);
  pointer-events: none;
}

.page-about .about-lede .eyebrow {
  position: relative;
}

.page-about .about-lede .display {
  position: relative;
  max-width: 20ch;
  margin: 0.16em 0 0.5em;
}

.page-about .about-lede .lede {
  position: relative;
  max-width: 62ch;
}

.page-about .about-facts {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(22px, 3vw, 34px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-facts__cell {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 15px 17px;
  background: var(--panel);
}

.page-about .about-facts__num {
  font-size: clamp(1.3rem, 2.3vw, 1.9rem);
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-facts__lab {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--dim);
}

@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 通用小标题 ---------- */
.page-about .about-head {
  max-width: 68ch;
}

.page-about .about-head .prose {
  margin-top: 12px;
}

.page-about .about-crew__shot,
.page-about .about-base__shot,
.page-about .about-eras__shot {
  margin-top: clamp(20px, 3vw, 34px);
  border-radius: var(--r-md);
}

/* ---------- 三张职务卡 ---------- */
.page-about .about-crew__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 32px);
  align-items: start;
}

.page-about .crew-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 20px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--t-fast);
}

.page-about .crew-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 3px;
  background: var(--crew-accent, var(--gold));
  transition: width var(--t-fast);
}

.page-about .crew-card:hover,
.page-about .crew-card:focus-within {
  border-color: var(--crew-accent, var(--gold));
}

.page-about .crew-card:hover::before,
.page-about .crew-card:focus-within::before {
  width: 104px;
}

.page-about .crew-card--gold {
  --crew-accent: var(--gold);
}

.page-about .crew-card--cyan {
  --crew-accent: var(--cyan);
}

.page-about .crew-card--coral {
  --crew-accent: var(--coral);
}

.page-about .crew-card .tag {
  align-self: flex-start;
}

.page-about .crew-card__title {
  margin: 2px 0 0;
  font-size: 1.1rem;
  line-height: 1.55;
  color: var(--white);
}

.page-about .crew-card p {
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .crew-card__out {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--dim);
}

@media (min-width: 900px) {
  .page-about .about-crew__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .crew-card:nth-child(2) {
    padding-top: 40px;
  }

  .page-about .crew-card:nth-child(3) {
    padding-top: 54px;
  }
}

/* ---------- 进档流程 ---------- */
.page-about .about-track {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-track__rail {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .tick {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}

.page-about .tick .mono {
  font-size: 0.74rem;
  color: var(--dim);
  transition: color var(--t-fast);
}

.page-about .tick:hover,
.page-about .tick:focus-visible {
  color: var(--white);
  border-color: var(--gold);
  background: var(--lift);
}

.page-about .tick:hover .mono,
.page-about .tick:focus-visible .mono {
  color: var(--gold);
}

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

.page-about .step {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--line-soft);
  transition: background var(--t-fast);
}

.page-about .step:target {
  background: linear-gradient(90deg, rgba(51, 225, 208, 0.07), transparent 72%);
}

.page-about .step__no {
  display: block;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .step__title {
  margin: 7px 0 9px;
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
  color: var(--white);
}

.page-about .step p {
  color: var(--muted);
  max-width: 64ch;
}

.page-about .step__out {
  margin-top: 10px;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--dim);
}

@media (min-width: 880px) {
  .page-about .about-track {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .about-track__rail {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
    align-self: start;
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    padding-left: 12px;
    border-left: 1px solid var(--line);
  }

  .page-about .tick {
    border: 0;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    border-left: 2px solid transparent;
    padding: 9px 10px;
  }

  .page-about .tick:hover,
  .page-about .tick:focus-visible {
    border-left-color: var(--gold);
  }

  .page-about .step {
    padding-left: 4px;
  }
}

/* ---------- 设备基准库 ---------- */
.page-about .about-base {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-base .col-6 {
  display: flex;
  flex-direction: column;
}

.page-about .about-base .col-6 p {
  margin-bottom: 0.9em;
}

/* ---------- 礼包码核验 ---------- */
.page-about .check-list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .check {
  padding: 20px 18px 22px;
  background: var(--panel);
}

.page-about .check__no {
  display: block;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .check__title {
  margin: 8px 0 8px;
  font-size: 1.04rem;
  color: var(--white);
}

.page-about .check p {
  color: var(--muted);
  font-size: 0.94rem;
}

.page-about .about-codes__note {
  margin-top: clamp(18px, 2.4vw, 26px);
  padding-left: 14px;
  border-left: 3px solid var(--coral);
}

@media (min-width: 820px) {
  .page-about .check-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 开服信息 ---------- */
.page-about .about-servers {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-servers__table {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-servers__foot {
  margin-top: clamp(18px, 2.4vw, 26px);
  display: grid;
  gap: 14px;
}

@media (min-width: 880px) {
  .page-about .about-servers__foot {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

/* ---------- 发展阶段 ---------- */
.page-about .about-eras {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-eras__list {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .era {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.page-about .era__dot {
  position: absolute;
  top: 6px;
  left: -5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold-deep);
  box-shadow: 0 0 0 3px var(--ink);
}

.page-about .era__no {
  display: block;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--dim);
}

.page-about .era__title {
  margin: 7px 0 8px;
  font-size: 1.04rem;
  color: var(--white);
}

.page-about .era p {
  color: var(--muted);
  font-size: 0.92rem;
}

.page-about .era__hint {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--gold);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--t-fast), opacity var(--t-fast), margin-top var(--t-fast);
}

.page-about .era:hover .era__hint,
.page-about .era:focus-within .era__hint {
  max-height: 80px;
  opacity: 1;
}

.page-about .about-eras__more {
  margin-top: clamp(18px, 2.4vw, 26px);
}

@media (min-width: 900px) {
  .page-about .about-eras__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    padding-top: 26px;
    border-top: 1px solid var(--line);
  }

  .page-about .era {
    padding: 0 24px 0 0;
    border-left: 0;
  }

  .page-about .era__dot {
    top: -30px;
    left: 0;
    width: 11px;
    height: 11px;
    background: var(--ink);
    border: 1px solid var(--line);
    box-shadow: none;
  }

  .page-about .era:hover .era__dot,
  .page-about .era:focus-within .era__dot {
    background: var(--gold);
    border-color: var(--gold);
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-hold {
  margin-top: clamp(30px, 4.6vw, 62px);
  border-radius: var(--r-lg);
}

.page-about .about-hold .prose {
  margin-top: 14px;
  max-width: 74ch;
}

.page-about .about-hold__act {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 20px;
  margin-top: clamp(20px, 2.8vw, 30px);
}

.page-about .about-hold__act .stamp {
  color: var(--dim);
}
<<<END>>>