.page-about {
  --about-hair: rgba(201, 162, 39, 0.28);
  --about-hair-soft: rgba(201, 162, 39, 0.16);
  --about-ink-soft: rgba(27, 27, 31, 0.62);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(120% 88% at 84% 6%, rgba(201, 162, 39, 0.2), transparent 62%),
    linear-gradient(168deg, var(--night) 0%, var(--night-2) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: clamp(10px, 2vw, 22px);
  border: 1px solid var(--about-hair);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: clamp(10px, 2vw, 22px);
  right: clamp(10px, 2vw, 22px);
  width: clamp(64px, 12vw, 148px);
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--gold) 0 1px, transparent 1px 11px);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(28px, 4vw, 44px) clamp(48px, 7vw, 96px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: end;
  margin-top: clamp(24px, 4vw, 48px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.6vw, 92px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--white);
  margin: 0.16em 0 0.34em;
}

.page-about .about-hero__title em {
  display: block;
  font-style: normal;
  color: var(--gold-lt);
}

.page-about .about-hero__lede {
  max-width: var(--read);
  font-size: var(--step-3);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.86);
  margin: 0;
}

.page-about .about-hero__aside {
  border-top: 1px solid var(--about-hair);
  padding-top: 18px;
}

.page-about .hero-meta__kicker {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  color: var(--gold-lt);
  margin: 0 0 14px;
}

.page-about .hero-meta {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .hero-meta > li {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .hero-meta > li:last-child {
  border-bottom: 0;
}

.page-about .hero-meta__num {
  font-family: var(--font-mono);
  font-size: var(--step-5);
  line-height: 1;
  color: var(--gold-lt);
}

.page-about .hero-meta__txt {
  font-size: var(--step-2);
  color: var(--mist);
  line-height: 1.6;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 48px);
}

/* ---------- 品牌由来 ---------- */
.page-about .origin {
  background: var(--paper);
  color: var(--ink);
}

.page-about .origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

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

.page-about .origin__cap {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--about-ink-soft);
}

.page-about .origin__text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.14;
  margin: 0.2em 0 0.6em;
  color: var(--ink);
}

.page-about .origin__text p {
  color: var(--ink);
}

/* ---------- 团队 ---------- */
.page-about .team {
  color: var(--white);
  background: linear-gradient(180deg, var(--night-2) 0%, var(--night) 100%);
}

.page-about .team__head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .team h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.14;
  margin: 0.2em 0 0.5em;
  color: var(--white);
}

.page-about .team__lede {
  font-size: var(--step-3);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  margin: 0;
}

.page-about .team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.6vw, 30px);
}

.page-about .num-block {
  border-top: 1px solid var(--about-hair);
  padding-top: clamp(14px, 2vw, 20px);
}

.page-about .num-block__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(46px, 7vw, 84px);
  line-height: 0.95;
  color: var(--gold-lt);
  letter-spacing: -0.01em;
}

.page-about .num-block__unit {
  font-size: var(--step-4);
  color: var(--gold);
  margin-left: 4px;
}

.page-about .num-block__label {
  font-size: var(--step-3);
  font-weight: 700;
  color: var(--white);
  margin: 10px 0 0;
}

.page-about .num-block__sub {
  font-size: var(--step-2);
  line-height: 1.75;
  color: var(--mist);
  margin: 6px 0 0;
}

.page-about .team__collage {
  margin: 0;
  align-self: start;
}

/* ---------- 栏目与专题 ---------- */
.page-about .system {
  background: var(--paper);
  color: var(--ink);
}

.page-about .system__head {
  max-width: 64ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .system h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.14;
  margin: 0.2em 0 0.5em;
  color: var(--ink);
}

.page-about .system__lede {
  font-size: var(--step-3);
  line-height: 1.8;
  color: var(--about-ink-soft);
  margin: 0;
}

.page-about .topic-card {
  background: var(--white);
  border-top: 3px solid var(--gold);
  padding: clamp(18px, 2.4vw, 28px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .topic-card__idx {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .topic-card__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-4);
  line-height: 1.3;
  margin: 0;
  color: var(--ink);
}

.page-about .topic-card__text {
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--about-ink-soft);
  margin: 0;
}

.page-about .topic-card__eg {
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--ink);
  margin: 0;
  padding-top: 10px;
  border-top: 1px solid var(--about-hair-soft);
}

/* ---------- 版本时间轴 ---------- */
.page-about .timeline {
  background: var(--paper);
  color: var(--ink);
}

.page-about .timeline__list {
  list-style: none;
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .timeline__node {
  position: relative;
  margin-left: 5px;
  padding: 0 0 24px 26px;
  border-left: 1px solid var(--line-gold);
}

.page-about .timeline__node:last-child {
  padding-bottom: 6px;
}

.page-about .timeline__dot {
  position: absolute;
  left: -6px;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--gold);
}

.page-about .timeline__node.is-current .timeline__dot {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(201, 162, 39, 0.2);
}

.page-about .timeline__ver {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step-2);
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .timeline__node.is-current .timeline__ver {
  color: var(--rose);
}

.page-about .timeline__note {
  display: block;
  margin-top: 4px;
  font-size: var(--step-2);
  line-height: 1.65;
  color: var(--about-ink-soft);
}

.page-about .timeline__foot {
  margin: clamp(22px, 3vw, 34px) 0 0;
  max-width: 62ch;
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .timeline__foot a,
.page-about .origin__text a,
.page-about .compare__tip a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

/* ---------- 版本对照 ---------- */
.page-about .compare {
  color: var(--white);
  background:
    radial-gradient(90% 60% at 12% 0%, rgba(15, 138, 102, 0.14), transparent 60%),
    var(--night);
}

.page-about .compare__head {
  max-width: 64ch;
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-about .compare h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.14;
  margin: 0.2em 0 0.5em;
  color: var(--white);
}

.page-about .compare__lede {
  font-size: var(--step-3);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  margin: 0;
}

.page-about .compare__figure {
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-about .compare__figure .origin__cap {
  color: var(--mist);
}

.page-about .compare__table-wrap {
  width: 100%;
}

.page-about .compare__table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step-2);
  text-align: left;
}

.page-about .compare__table th {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  font-weight: 400;
  color: var(--gold-lt);
  padding: 12px 14px;
  border-bottom: 1px solid var(--about-hair);
  white-space: nowrap;
}

.page-about .compare__table td {
  padding: 14px;
  border-bottom: 1px solid var(--about-hair-soft);
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.7;
  vertical-align: top;
}

.page-about .compare__table tr.is-diff td {
  background: rgba(15, 138, 102, 0.1);
}

.page-about .compare__table tr.is-diff td:first-child {
  box-shadow: inset 3px 0 0 var(--jade);
}

.page-about .diff-flag {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 7px;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--night);
  background: var(--jade);
  border-radius: 2px;
  vertical-align: middle;
}

.page-about .compare__tip {
  max-width: 62ch;
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: var(--step-2);
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.8);
}

.page-about .compare__tip a {
  color: var(--gold-lt);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

.page-about .compare__accordion {
  margin-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--about-hair);
}

/* ---------- 协作与维护 ---------- */
.page-about .partners {
  background: var(--paper);
  color: var(--ink);
}

.page-about .partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.page-about .partners__text h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.14;
  margin: 0.2em 0 0.6em;
  color: var(--ink);
}

.page-about .partners__text p {
  color: var(--ink);
}

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

.page-about .partners__list > li {
  padding: 16px 0;
  border-top: 1px solid var(--line-gold);
}

.page-about .partners__list > li:last-child {
  border-bottom: 1px solid var(--line-gold);
}

.page-about .partners__k {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .partners__v {
  display: block;
  font-size: var(--step-2);
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* ---------- 下一步 ---------- */
.page-about .next {
  color: var(--white);
  background: linear-gradient(180deg, var(--night) 0%, var(--night-2) 100%);
}

.page-about .next__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.6vw, 48px);
  line-height: 1.14;
  margin: 0.2em 0 clamp(22px, 3vw, 34px);
  color: var(--white);
}

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

.page-about .next__item {
  border-top: 1px solid var(--about-hair);
}

.page-about .next__item:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .next__item a {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "idx title"
    "idx desc";
  column-gap: 16px;
  align-items: baseline;
  padding: 18px 0;
  color: var(--white);
  text-decoration: none;
  transition: color 0.18s ease;
}

.page-about .next__item a:hover,
.page-about .next__item a:focus-visible {
  color: var(--gold-lt);
}

.page-about .next__idx {
  grid-area: idx;
  font-family: var(--font-mono);
  font-size: var(--step-2);
  color: var(--gold);
  letter-spacing: 0.06em;
}

.page-about .next__t {
  grid-area: title;
  font-size: var(--step-4);
  font-weight: 700;
  line-height: 1.3;
}

.page-about .next__d {
  grid-area: desc;
  display: block;
  margin-top: 4px;
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__lede {
    font-size: var(--step-4);
  }

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

  .page-about .num-block--wide {
    grid-column: span 2;
  }

  .page-about .team__collage {
    grid-column: span 3;
    max-width: 380px;
  }

  .page-about .partners__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: clamp(36px, 6vw, 88px);
  }

  .page-about .origin__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .origin__text {
    padding-top: clamp(20px, 4vw, 64px);
  }

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

  .page-about .team__collage {
    grid-column: span 1;
    max-width: none;
  }

  .page-about .timeline__list {
    grid-template-columns: repeat(9, minmax(0, 1fr));
  }

  .page-about .timeline__node {
    margin-left: 0;
    padding: 28px 12px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line-gold);
  }

  .page-about .timeline__node:last-child {
    padding-bottom: 0;
  }

  .page-about .timeline__dot {
    left: 0;
    top: -6px;
    background: var(--paper);
  }
}

@media (max-width: 819px) {
  .page-about .compare__table,
  .page-about .compare__table tbody,
  .page-about .compare__table tr,
  .page-about .compare__table td {
    display: block;
    width: 100%;
  }

  .page-about .compare__table thead {
    display: none;
  }

  .page-about .compare__table tr {
    margin-bottom: 14px;
    padding: 10px 14px 12px;
    border: 1px solid var(--about-hair-soft);
    background: rgba(255, 255, 255, 0.03);
  }

  .page-about .compare__table tr.is-diff {
    border-left: 3px solid var(--jade);
  }

  .page-about .compare__table tr.is-diff td {
    background: transparent;
  }

  .page-about .compare__table tr.is-diff td:first-child {
    box-shadow: none;
  }

  .page-about .compare__table td {
    padding: 6px 0;
    border-bottom: 0;
  }

  .page-about .compare__table td::before {
    content: attr(data-label);
    display: block;
    font-family: var(--font-mono);
    font-size: var(--step-1);
    letter-spacing: 0.06em;
    color: var(--gold-lt);
    margin-bottom: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next__item a {
    transition: none;
  }
}
<<<END>>>