.page-about {
  --about-tip-bg: #121614;
  background: var(--ink);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
}

.page-about .about-hero__media {
  position: relative;
  height: clamp(200px, 34vh, 430px);
  overflow: hidden;
  background: var(--deep);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  filter: saturate(.5) brightness(.68) contrast(1.08);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 88% at 76% 10%, rgba(255, 177, 59, .16), transparent 62%),
    linear-gradient(180deg, rgba(11, 31, 26, .62) 0%, rgba(11, 31, 26, .16) 42%, rgba(11, 31, 26, .97) 100%);
}

.page-about .about-hero__body {
  position: relative;
  z-index: 2;
  margin-top: calc(clamp(34px, 7vw, 100px) * -1);
  padding-bottom: clamp(28px, 4.5vw, 56px);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: clamp(42px, 8.4vw, 118px);
  line-height: .94;
  letter-spacing: -.04em;
  color: var(--text);
}

.page-about .about-hero__lede {
  max-width: 44ch;
  margin: 20px 0 0;
  color: var(--text);
}

.page-about .about-ledger {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  max-width: 880px;
  border-top: 1px solid var(--grid-line);
}

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

.page-about .about-ledger__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6.2vw, 54px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--amber);
  text-shadow: 0 0 1px rgba(255, 177, 59, .55);
}

.page-about .about-ledger__unit {
  grid-column: 2;
  grid-row: 1;
  align-self: end;
  font-family: var(--font-condensed);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--text);
}

.page-about .about-ledger__note {
  grid-column: 2;
  grid-row: 2;
  margin-top: 3px;
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 文档骨架 ---------- */
.page-about .about-shell {
  display: grid;
  gap: 30px;
  padding-bottom: clamp(48px, 7vw, 100px);
}

.page-about .about-index {
  padding-top: 6px;
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--muted);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  border-bottom: 1px solid var(--grid-line);
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid var(--grid-line);
  color: var(--muted);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: .04em;
  white-space: nowrap;
  transition: color var(--base) var(--ease), border-color var(--base) var(--ease), background-color var(--base) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--text);
  border-color: var(--amber);
  background: var(--amber-12);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--amber);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: clamp(34px, 5.5vw, 66px) 0;
  border-top: 1px solid var(--grid-line);
}

.page-about .about-body > .about-section:first-child {
  border-top: 0;
  padding-top: 10px;
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-section__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--amber);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-condensed);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--text);
}

/* ---------- 六步校订 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-steps__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-steps__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-condensed);
  font-weight: 600;
  font-size: clamp(17px, 2vw, 21px);
  letter-spacing: 0;
  color: var(--text);
}

.page-about .about-steps__text {
  grid-column: 2;
  grid-row: 2;
  margin: 6px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-figure {
  margin: clamp(24px, 3.6vw, 40px) 0 0;
}

.page-about .about-figure--band {
  margin-top: 0;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.62) brightness(.86);
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  margin: clamp(20px, 3vw, 30px) 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--cyan);
  background: none;
}

.page-about .about-quote p {
  margin: 0;
  max-width: 34ch;
  font-family: var(--font-condensed);
  font-weight: 600;
  font-size: clamp(18px, 2.4vw, 25px);
  line-height: 1.6;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .about-quote__note {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 版本号 ---------- */
.page-about .about-version {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: clamp(18px, 2.6vw, 28px) 0;
  border-top: 1px solid var(--grid-line);
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-version__code {
  position: relative;
  display: inline-block;
  margin: 0;
  padding-bottom: 6px;
  font-family: var(--font-mono);
  font-size: clamp(21px, 4.4vw, 44px);
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.1;
  color: var(--cyan);
  border-bottom: 1px dashed var(--grid-line);
  cursor: help;
}

.page-about .about-version__code span[tabindex]:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-about .about-version__gloss {
  position: absolute;
  left: 0;
  bottom: calc(100% + 14px);
  z-index: 5;
  width: min(340px, 78vw);
  padding: 12px 14px;
  background: var(--about-tip-bg);
  border: 1px solid var(--amber-24);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: .02em;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--base) var(--ease), visibility var(--base) var(--ease);
}

.page-about .about-version__code:hover .about-version__gloss,
.page-about .about-version__code:focus-within .about-version__gloss {
  opacity: 1;
  visibility: visible;
}

.page-about .about-version__parts {
  margin: 20px 0 0;
  padding: 0;
}

.page-about .about-version__part {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  column-gap: 16px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-version__part dt {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-version__part dd {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
}

.page-about .about-team__item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  column-gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-team__count {
  grid-column: 1;
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
}

.page-about .about-team__role {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-condensed);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: .02em;
  color: var(--text);
}

.page-about .about-team__note {
  grid-column: 2;
  grid-row: 2;
  margin-top: 3px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 赛季节点 ---------- */
.page-about .about-seasons {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  border-left: 2px solid var(--grid-line);
}

.page-about .about-seasons .accordion__item {
  position: relative;
  padding-left: 26px;
  border-bottom: 1px solid var(--grid-line);
}

.page-about .about-seasons .accordion__item::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 22px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border: 2px solid var(--amber);
  border-radius: 50%;
  background: var(--ink);
  transition: background-color var(--base) var(--ease);
}

.page-about .about-seasons .accordion__item:hover::before {
  background: var(--amber);
}

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

.page-about .about-seasons .accordion__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  text-align: left;
}

.page-about .about-season__tag {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-season__label {
  flex: 1 1 auto;
  font-family: var(--font-condensed);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: .01em;
  color: var(--text);
}

.page-about .about-season__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-season__meta {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 84px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 40px);
    padding-top: 4px;
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-bottom: 0;
    border-left: 1px solid var(--grid-line);
  }

  .page-about .about-index__list li {
    display: block;
  }

  .page-about .about-index__link {
    position: relative;
    display: flex;
    padding: 9px 0 9px 15px;
    border: 0;
    white-space: normal;
    line-height: 1.5;
  }

  .page-about .about-index__link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 7px;
    bottom: 7px;
    width: 2px;
    background: var(--amber);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--base) var(--ease);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    background: transparent;
  }

  .page-about .about-index__link:hover::before,
  .page-about .about-index__link:focus-visible::before {
    transform: scaleY(1);
  }

  .page-about .about-ledger__row {
    grid-template-columns: minmax(120px, auto) minmax(0, 1fr);
    column-gap: 32px;
    align-items: center;
  }

  .page-about .about-ledger__num {
    font-size: clamp(38px, 4.4vw, 60px);
  }

  .page-about .about-version__parts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

@media (min-width: 1360px) {
  .page-about .about-hero__lede {
    max-width: 48ch;
  }

  .page-about .about-steps__item {
    grid-template-columns: 44px minmax(0, 1fr);
  }
}
<<<END>>>