.page-about {
  --about-rail-top: calc(var(--yk-strip-h) + 88px);
  color: var(--ice);
  background: var(--ink);
}

.page-about .about-crumbbar {
  background: var(--ink);
  padding: clamp(16px, 3vw, 26px) 0 0;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(96% 74% at 90% -18%, rgba(242, 181, 68, 0.2), transparent 62%),
    radial-gradient(66% 62% at 4% 112%, rgba(88, 214, 162, 0.12), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(237, 244, 255, 0.05) 0 1px, transparent 1px 7px);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 52px);
  align-items: end;
  padding-top: clamp(30px, 5vw, 58px);
  padding-bottom: clamp(38px, 6vw, 76px);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

.page-about .about-dossier {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.page-about .about-dossier__no {
  padding: 5px 12px;
  border: 1px solid rgba(242, 181, 68, 0.5);
  border-radius: 999px;
  color: var(--amber);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-about .about-dossier__label {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-about .about-title {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  font-size: clamp(2rem, 7vw, 4.2rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.035em;
  color: var(--ice);
  text-wrap: balance;
}

.page-about .about-lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding-top: 18px;
  border-top: 2px solid var(--line);
}

.page-about .about-fact dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-fact dd {
  margin: 6px 0 0;
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--amber);
}

.page-about .about-portrait {
  margin: 0;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .about-portrait {
    margin-bottom: -12px;
  }
}

.page-about .about-portrait img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  background: var(--ink-2);
}

.page-about .about-portrait figcaption {
  padding: 12px 16px 14px;
  border-top: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* 主体：左轨 + 右叙事 */
.page-about .about-shell {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  padding-top: clamp(36px, 5vw, 64px);
  padding-bottom: clamp(52px, 8vw, 96px);
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

.page-about .about-rail {
  align-self: start;
  min-width: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}

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

.page-about .about-rail__title {
  display: none;
}

.page-about .about-rail__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 14px;
  border: 2px solid var(--line);
  border-radius: 999px;
  color: var(--mist);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), transform 0.16s var(--ease);
}

.page-about .about-rail__link .yk-mono {
  font-size: 12px;
  color: var(--amber);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--amber);
  border-color: var(--coral);
  transform: translateX(2px);
}

.page-about .about-rail__link--go {
  border-color: var(--amber);
  background: var(--amber);
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-rail__link--go .yk-mono {
  color: var(--ink);
}

.page-about .about-rail__link--go:hover,
.page-about .about-rail__link--go:focus-visible {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--ink);
}

@media (min-width: 1000px) {
  .page-about .about-rail {
    position: sticky;
    top: var(--about-rail-top);
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding: 0 0 0 14px;
    border-left: 2px solid var(--line);
  }

  .page-about .about-rail__title {
    display: block;
    margin: 0 0 8px;
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--mist);
  }

  .page-about .about-rail__link {
    justify-content: flex-start;
    min-height: 36px;
    padding: 6px 8px;
    border: none;
    border-radius: 8px;
  }

  .page-about .about-rail__link--go {
    margin-top: 12px;
    padding: 10px 12px;
    border: 2px solid var(--amber);
    border-radius: 8px;
  }
}

.page-about .about-stream {
  min-width: 0;
  display: grid;
  gap: clamp(44px, 7vw, 80px);
}

.page-about .about-block {
  scroll-margin-top: calc(var(--yk-strip-h) + 92px);
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-kicker .yk-mono {
  padding: 2px 8px;
  border-radius: 5px;
  background: var(--amber);
  color: var(--ink);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
}

.page-about .about-h2 {
  margin: 12px 0 0;
  font-size: clamp(1.55rem, 4vw, 2.5rem);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--ice);
}

.page-about .about-lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-prose {
  margin: 20px 0 0;
  max-width: 66ch;
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-prose strong {
  color: var(--ice);
  font-weight: 600;
}

.page-about .about-points {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding: 14px 16px 14px 42px;
  border: 2px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--ink-2);
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 22px;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(88, 214, 162, 0.18);
}

.page-about .about-points strong {
  color: var(--ice);
}

/* 三类栏目 */
.page-about .about-columns {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-about .about-columns__row {
  display: grid;
  gap: 14px;
  padding: clamp(18px, 3vw, 26px);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--card) 0%, var(--ink-2) 100%);
  box-shadow: var(--shadow-hard);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-columns__row:hover {
  transform: translate(2px, -2px);
  border-color: var(--coral);
}

@media (min-width: 760px) {
  .page-about .about-columns__row {
    grid-template-columns: minmax(0, 0.34fr) minmax(0, 0.66fr);
    align-items: start;
    gap: clamp(16px, 3vw, 34px);
  }
}

@media (min-width: 900px) {
  .page-about .about-columns__row:nth-child(2) {
    margin-left: 14px;
  }

  .page-about .about-columns__row:nth-child(3) {
    margin-left: 28px;
  }
}

.page-about .about-columns__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-columns__name {
  margin: 8px 0 0;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-about .about-columns__role {
  margin: 8px 0 0;
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--jade);
}

.page-about .about-columns__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

/* 版本时间轴 */
.page-about .about-band {
  margin: 24px 0 0;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 5;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
  list-style: none;
  display: grid;
  gap: 22px;
  border-left: 2px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 16px 18px 18px;
  border: 2px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--ink-2);
  transition: border-color 0.18s var(--ease);
}

.page-about .about-timeline__item:hover {
  border-color: var(--coral);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 2px var(--ink), 0 0 0 4px rgba(242, 181, 68, 0.35);
}

.page-about .about-timeline__ver {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-timeline__title {
  margin: 8px 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .about-timeline__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 860px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(16px, 2.4vw, 26px);
    padding: 30px 0 0;
    border-left: none;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--coral), var(--amber) 48%, var(--jade));
  }

  .page-about .about-timeline__item::before {
    left: 24px;
    top: -37px;
  }
}

.page-about .about-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--jade);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-note a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 181, 68, 0.5);
}

.page-about .about-note a:hover,
.page-about .about-note a:focus-visible {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* 团队 */
.page-about .about-diagram {
  margin: 24px 0 0;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-diagram img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

@media (min-width: 720px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-team__card {
  padding: 18px 18px 20px;
  border: 2px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--ink-2);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translate(0, -2px);
  border-color: var(--jade);
  box-shadow: 0 8px 0 rgba(3, 8, 16, 0.35);
}

.page-about .about-team__no {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--coral);
}

.page-about .about-team__name {
  margin: 8px 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .about-team__card p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* 维护节奏 */
.page-about .about-cadence {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--line);
}

.page-about .about-cadence li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 2px solid var(--line);
}

@media (min-width: 700px) {
  .page-about .about-cadence li {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }
}

.page-about .about-cadence__k {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-about .about-cadence__v {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-callout {
  display: grid;
  gap: 16px;
  margin: 30px 0 0;
  padding: clamp(20px, 3.4vw, 30px);
  border: 2px solid var(--amber);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(242, 181, 68, 0.14), rgba(255, 107, 74, 0.08)),
    var(--card);
  box-shadow: var(--shadow-hard);
}

.page-about .about-callout p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ice);
}

.page-about .about-callout__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 680px) {
  .page-about .about-callout {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

.page-about .about-tail {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-tail a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 181, 68, 0.5);
}

.page-about .about-tail a:hover,
.page-about .about-tail a:focus-visible {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-columns__row:hover,
  .page-about .about-team__card:hover,
  .page-about .about-rail__link:hover {
    transform: none;
  }
}
<<<END>>>