.page-about {
  --ab-cut: 14px;
  --ab-rule: rgba(46, 50, 54, 0.16);
  --ab-rule-strong: rgba(46, 50, 54, 0.34);
  --ab-ink-soft: #3A4046;
  background: var(--concrete-light);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 26px 0 52px;
  background-color: var(--stand-white);
  background-image:
    repeating-linear-gradient(90deg, rgba(46, 50, 54, 0.028) 0 1px, transparent 1px 46px),
    radial-gradient(115% 82% at 88% -12%, rgba(168, 213, 184, 0.42), transparent 62%),
    linear-gradient(180deg, var(--stand-white) 0%, var(--concrete-light) 100%);
}

.page-about .breadcrumb {
  margin: 0 0 26px;
  font-size: 13px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center 42%;
  background: var(--night);
  filter: saturate(0.78) brightness(0.96) contrast(1.04);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--ab-cut) 100%, 0 calc(100% - var(--ab-cut)));
}

.page-about .about-hero__body {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.page-about .about-hero__body h1 {
  margin: 0;
  max-width: 19ch;
  font-family: var(--font-heading);
  font-size: clamp(30px, 6.4vw, 54px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-hero__body .lead {
  margin: 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .hero-stats {
  list-style: none;
  margin: 6px 0 0;
  padding: 20px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 22px;
  border-top: 1px solid var(--ab-rule);
}

.page-about .hero-stats__item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .hero-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--concrete-dark);
}

.page-about .hero-stats__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--note);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-about .about-hero__foot {
  margin-top: 42px;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, var(--ab-rule-strong) 0 1px, transparent 1px 13px);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 0 68px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 56px;
  }

  .page-about .about-hero__media img {
    aspect-ratio: 3 / 5;
    max-height: 600px;
  }

  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 编号长文 ---------- */

.page-about .about-chronicle {
  padding: 52px 0 60px;
}

.page-about .chronicle {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

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

.page-about .chronicle__stream {
  min-width: 0;
}

.page-about .rail-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  position: relative;
  padding: 7px 0 7px 16px;
  border-left: 1px solid var(--ab-rule);
  font-size: 13px;
  color: var(--note);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .rail-item::before {
  content: "";
  position: absolute;
  left: -3.5px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--concrete-light);
  border: 1px solid var(--ab-rule-strong);
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-about .rail-item:hover,
.page-about .rail-item:focus-visible {
  color: var(--turf);
  border-left-color: var(--turf);
}

.page-about .rail-item:hover::before,
.page-about .rail-item:focus-visible::before {
  background: var(--turf);
  border-color: var(--turf);
}

.page-about .rail-item__num {
  font-size: 12px;
}

.page-about .rail-item__year {
  font-size: 12px;
  opacity: 0.72;
}

.page-about .about-chapter {
  position: relative;
  max-width: 720px;
  scroll-margin-top: 120px;
}

.page-about .about-chapter + .about-chapter {
  margin-top: 44px;
  padding-top: 44px;
  background-image: linear-gradient(90deg, var(--ab-rule-strong), rgba(46, 50, 54, 0) 62%);
  background-size: 100% 1px;
  background-position: top left;
  background-repeat: no-repeat;
}

.page-about .about-chapter__mark {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  margin: 0 0 12px;
}

.page-about .about-chapter__year {
  font-family: var(--font-mono);
  font-size: clamp(40px, 8vw, 62px);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.03em;
  color: var(--concrete-dark);
}

.page-about .about-chapter__idx {
  padding-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--turf);
}

.page-about .about-chapter__title {
  margin: 0 0 18px;
  font-family: var(--font-heading);
  font-size: clamp(24px, 4.6vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.page-about .about-chapter__body {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .about-chapter__body p {
  margin: 0 0 18px;
}

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

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

.page-about .about-chapter__body a {
  color: var(--turf);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-chapter__body a:hover,
.page-about .about-chapter__body a:focus-visible {
  color: var(--ink);
}

.page-about .about-chapter--lead .about-chapter__body > p:first-child::first-letter {
  float: left;
  padding: 6px 14px 0 0;
  font-family: var(--font-heading);
  font-size: 58px;
  font-weight: 700;
  line-height: 0.84;
  color: var(--turf);
}

@media (min-width: 1024px) {
  .page-about .about-chronicle {
    padding: 76px 0 84px;
  }

  .page-about .chronicle {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 64px;
  }

  .page-about .chronicle__rail {
    display: flex;
    flex-direction: column;
    gap: 2px;
    position: sticky;
    top: 132px;
    align-self: start;
  }
}

/* ---------- 团队分工 ---------- */

.page-about .about-bento {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 26px 0 22px;
}

.page-about .team-ring {
  padding: 22px 22px 24px;
  background: var(--stand-white);
  border: 1px solid var(--ab-rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .team-ring__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--note);
}

.page-about .team-ring__figure {
  position: relative;
  width: 100%;
  max-width: 210px;
  margin: 0 auto;
}

.page-about .team-ring__figure svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ring-seg {
  opacity: 0.92;
  transition: opacity 0.18s ease, stroke-width 0.18s ease;
}

.page-about .ring-seg:hover {
  opacity: 1;
  stroke-width: 26;
}

.page-about .team-ring__total {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  margin: 0;
  font-family: var(--font-mono);
  color: var(--ink);
  pointer-events: none;
}

.page-about .team-ring__total span {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
}

.page-about .team-ring__total small {
  font-size: 12px;
  color: var(--note);
}

.page-about .team-ring__legend {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--ab-ink-soft);
}

.page-about .team-ring__legend li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-about .team-ring__legend b {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--ink);
}

.page-about .team-ring__dot {
  flex: none;
  width: 9px;
  height: 9px;
}

.page-about .team-ring__dot--a { background: var(--turf); }
.page-about .team-ring__dot--b { background: var(--turf-soft); }
.page-about .team-ring__dot--c { background: var(--concrete-dark); }
.page-about .team-ring__dot--d { background: var(--score-red); }

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

.page-about .about-bento__photo img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  background: var(--night);
  filter: saturate(0.8) brightness(0.97);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

@media (min-width: 860px) {
  .page-about .about-bento {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 26px;
    align-items: start;
  }
}

/* ---------- 伤停字段 ---------- */

.page-about .field-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .field-list li {
  padding: 6px 14px 6px 12px;
  font-size: 13px;
  color: var(--ink);
  background: var(--stand-white);
  border: 1px solid var(--ab-rule);
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 0 100%);
}

.page-about .update-rounds {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .update-rounds li {
  padding: 14px 16px 16px;
  background: var(--stand-white);
  border-left: 3px solid var(--turf);
}

.page-about .update-rounds b {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .update-rounds span {
  display: block;
  font-size: 13px;
  line-height: 1.65;
  color: var(--note);
}

.page-about .work-rule {
  margin: 28px 0 0;
  padding: 26px 28px 28px;
  background: var(--concrete-dark);
  color: var(--stand-white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .work-rule p {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(18px, 2.8vw, 24px);
  line-height: 1.6;
  color: var(--stand-white);
}

.page-about .work-rule p::before {
  content: "";
  display: block;
  width: 36px;
  height: 3px;
  margin-bottom: 16px;
  background: var(--turf-soft);
}

@media (min-width: 720px) {
  .page-about .update-rounds {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 单幅插图 ---------- */

.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure--narrow {
  max-width: 420px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--night);
  filter: saturate(0.8) brightness(0.97);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--note);
}

/* ---------- 收束条 ---------- */

.page-about .about-outro-section {
  padding: 0 0 72px;
}

.page-about .about-outro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 22px;
  padding: 30px 28px 32px;
  background-color: var(--night);
  background-image:
    repeating-linear-gradient(90deg, rgba(245, 246, 243, 0.05) 0 1px, transparent 1px 40px),
    linear-gradient(120deg, var(--night) 0%, #22333D 100%);
  color: var(--stand-white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .about-outro p {
  flex: 1 1 320px;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(245, 246, 243, 0.88);
}

@media (min-width: 900px) {
  .page-about .about-outro-section {
    padding: 0 0 96px;
  }

  .page-about .about-outro {
    padding: 36px 40px 38px;
  }
}
<<<END>>>