.page-about {
  --about-track-x: 26px;
  display: block;
  padding-block: 0 72px;
  background: var(--paper-50);
  color: var(--text-900);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .about-crumbs {
  padding-block: 18px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--text-500);
}

.page-about .about-crumbs a {
  color: var(--sky-700);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: 22px 44px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--sky-700);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 6.4vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink-900);
  max-width: 17ch;
}

.page-about .about-lede {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-900);
  max-width: 62ch;
}

.page-about .about-keyfacts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.page-about .about-keyfacts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 2px solid var(--ink-900);
  background: #fff;
  font-size: 14px;
}

.page-about .about-keyfacts .mono {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--sky-700);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--ink-900);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.page-about .about-hero__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--neon-400);
  background: var(--ink-900);
  border-top: 2px solid var(--ink-line);
}

/* ---------- 纵向轨道 ---------- */
.page-about .about-body {
  position: relative;
  padding-top: 6px;
}

.page-about .about-sec {
  position: relative;
  padding-block: 44px 52px;
  border-top: 2px solid var(--line-200);
}

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

.page-about .about-sec__head {
  max-width: 68ch;
  margin-bottom: 30px;
}

.page-about .about-sec__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sky-600);
}

.page-about .about-sec__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.6vw, 28px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-about .about-sec__lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-900);
}

/* ---------- 01 规模 ---------- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 26px;
}

.page-about .about-scale__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px 14px 18px;
  background: #fff;
  border: 2px solid var(--ink-900);
  border-left-width: 8px;
  box-shadow: 4px 4px 0 var(--line-200);
}

.page-about .about-scale__item--sum {
  border-left-color: var(--violet-400);
  background: var(--ink-900);
  box-shadow: 4px 4px 0 var(--sky-600);
}

.page-about .about-scale__v {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1;
  color: var(--sky-700);
}

.page-about .about-scale__item--sum .about-scale__v {
  color: var(--neon-400);
}

.page-about .about-scale__k {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-500);
}

.page-about .about-scale__item--sum .about-scale__k {
  color: var(--amber-200);
}

.page-about .about-note {
  padding: 20px 20px 22px;
  background: var(--sky-100);
  border: 2px solid var(--sky-700);
  border-left-width: 8px;
}

.page-about .about-note__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  color: var(--sky-700);
}

.page-about .about-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-900);
}

/* ---------- 02 五环节路径 ---------- */
.page-about .about-path {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-path__node {
  position: relative;
  padding-left: 62px;
  padding-bottom: 20px;
}

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

.page-about .about-path__node::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 44px;
  bottom: -2px;
  width: 2px;
  background: linear-gradient(180deg, var(--sky-600), var(--line-200));
}

.page-about .about-path__node:last-child::before {
  display: none;
}

.page-about .about-path__idx {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-900);
  background: var(--neon-400);
  border: 2px solid var(--ink-900);
}

.page-about .about-path__panel {
  padding: 16px 18px 18px;
  background: #fff;
  border: 2px solid var(--ink-900);
  box-shadow: 5px 5px 0 var(--line-200);
  transition: box-shadow 160ms ease-out, transform 160ms ease-out;
}

.page-about .about-path__panel:hover,
.page-about .about-path__panel:focus-within {
  box-shadow: 2px 2px 0 var(--line-200);
  transform: translate(2px, 2px);
}

.page-about .about-path__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-about .about-path__meta {
  margin: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-path__meta > div {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--line-200);
}

.page-about .about-path__meta dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sky-600);
}

.page-about .about-path__meta dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-900);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 26px;
}

.page-about .about-team__figure {
  margin: 0;
  border: 2px solid var(--ink-900);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.page-about .about-team__list {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--ink-900);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 14px 0;
  border-bottom: 2px solid var(--line-200);
}

.page-about .about-team__n {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.1;
  color: var(--sky-700);
}

.page-about .about-team__role {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  color: var(--ink-900);
}

.page-about .about-team__desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-500);
}

.page-about .about-team__rule {
  margin: 0;
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-900);
  background: var(--amber-200);
  border: 2px solid var(--ink-900);
  border-left-width: 8px;
}

/* ---------- 04 时间线 ---------- */
.page-about .about-timeline {
  display: flex;
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 10px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline:focus-visible {
  outline: 2px solid var(--violet-400);
  outline-offset: 4px;
}

.page-about .about-band {
  flex: 0 0 78%;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 18px 20px;
  background: #fff;
  border: 2px solid var(--ink-900);
  border-top-width: 10px;
}

.page-about .about-band--summer {
  border-top-color: var(--neon-400);
}

.page-about .about-band--winter {
  border-top-color: var(--amber-400);
}

.page-about .about-band--extra {
  border-top-color: var(--violet-400);
}

.page-about .about-band__code {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--paper-50);
  background: var(--ink-900);
}

.page-about .about-band__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.3;
  color: var(--ink-900);
}

.page-about .about-band__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-900);
}

.page-about .about-band__facts {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px dashed var(--line-200);
  padding-top: 10px;
}

.page-about .about-band__facts li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-500);
}

.page-about .about-band__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 7px;
  height: 2px;
  background: var(--sky-600);
}

.page-about .about-band .tag {
  align-self: flex-start;
  margin-top: auto;
}

.page-about .about-preview {
  margin-top: 22px;
  padding: 20px 20px 22px;
  background: var(--ink-900);
  border: 2px solid var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.page-about .about-preview__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  color: var(--aqua-400);
}

.page-about .about-preview p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-50);
}

/* ---------- 05 版本 ---------- */
.page-about .about-vers-layout {
  display: grid;
  gap: 26px;
}

.page-about .about-vers__figure {
  margin: 0;
  border: 2px solid var(--ink-900);
  background: var(--sky-100);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-vers__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.page-about .about-vers__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-900);
  background: var(--sky-100);
  border-top: 2px solid var(--ink-900);
}

.page-about .about-vers__side .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-vers__side .filter-bar__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-500);
}

.page-about .about-vers__side .filter-btn {
  padding: 6px 13px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-900);
  background: #fff;
  border: 2px solid var(--ink-900);
  cursor: pointer;
  transition: background 140ms ease-out, color 140ms ease-out;
}

.page-about .about-vers__side .filter-btn:hover {
  background: var(--sky-100);
}

.page-about .about-vers__side .filter-btn[aria-pressed="true"] {
  background: var(--ink-900);
  color: var(--neon-400);
}

.page-about .about-vers {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-ver {
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  background: #fff;
  border: 2px solid var(--ink-900);
  border-left-width: 8px;
  border-left-color: var(--violet-400);
}

.page-about .about-ver__num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--violet-400);
  padding-top: 2px;
}

.page-about .about-ver__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  line-height: 1.3;
  color: var(--ink-900);
}

.page-about .about-ver__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-900);
}

.page-about .about-vers__meta {
  margin: 0 0 12px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--ink-900);
  background: var(--amber-200);
  border: 2px solid var(--ink-900);
}

.page-about .about-vers__linkline {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-900);
}

.page-about .about-vers__linkline a {
  color: var(--sky-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 06 纠错 ---------- */
.page-about .about-fix {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-fix__step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  background: #fff;
  border: 2px solid var(--ink-900);
  box-shadow: 5px 5px 0 var(--line-200);
}

.page-about .about-fix__n {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-900);
  background: var(--aqua-400);
  border: 2px solid var(--ink-900);
}

.page-about .about-fix__step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  color: var(--ink-900);
}

.page-about .about-fix__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-900);
}

.page-about .about-links {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}

.page-about .about-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 16px;
  text-decoration: none;
  color: inherit;
  background: var(--sky-100);
  border: 2px solid var(--sky-700);
  transition: box-shadow 160ms ease-out, transform 160ms ease-out;
  box-shadow: 5px 5px 0 var(--sky-700);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--sky-700);
}

.page-about .about-link__t {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  color: var(--sky-700);
}

.page-about .about-link__d {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-900);
}

.page-about .about-closing {
  margin: 0;
  padding-top: 18px;
  border-top: 2px solid var(--line-200);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-500);
}

.page-about .about-closing a {
  color: var(--sky-600);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-hero__figure {
    margin-top: 26px;
  }

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

  .page-about .about-band {
    flex: 0 0 46%;
  }

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

@media (min-width: 1000px) {
  .page-about {
    padding-bottom: 96px;
  }

  .page-about .about-body::before {
    content: "";
    position: absolute;
    left: var(--about-track-x);
    top: 10px;
    bottom: 40px;
    width: 2px;
    background: repeating-linear-gradient(180deg, var(--line-200) 0 18px, transparent 18px 34px);
  }

  .page-about .about-sec {
    padding-left: 92px;
    padding-block: 60px 68px;
  }

  .page-about .about-sec__marker {
    display: block;
    position: absolute;
    left: 12px;
    top: 62px;
    width: 30px;
    height: 30px;
    background: var(--paper-50);
    border: 2px solid var(--ink-900);
  }

  .page-about .about-sec__marker::after {
    content: "";
    position: absolute;
    inset: 6px;
    background: var(--sky-600);
  }

  .page-about .about-scale {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-team__figure {
    margin-top: 22px;
  }

  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow-x: visible;
  }

  .page-about .about-band {
    flex: initial;
  }

  .page-about .about-vers-layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
    gap: 40px;
  }

  .page-about .about-vers__figure {
    position: sticky;
    top: 24px;
    margin-top: 18px;
  }
}
<<<END>>>