.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(2.25rem, 5vw, 4rem);
  background:
    radial-gradient(120% 90% at 8% -10%, rgba(39, 36, 71, 0.85) 0%, transparent 58%),
    var(--k-ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -14%;
  width: min(60vw, 620px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(200, 255, 61, 0.16), transparent 64%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--k-line);
}

.page-about .about-hero .k-crumbs {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  position: relative;
  z-index: 1;
  margin: clamp(1.25rem, 4vw, 2.5rem) 0 0;
  font-family: var(--k-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--k-lime);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  position: relative;
  z-index: 1;
  margin: 0.6rem 0 0;
  font-family: var(--k-sans);
  font-weight: 800;
  font-size: clamp(2.3rem, 8.6vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
  color: var(--k-paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--k-lime);
}

.page-about .about-hero__lead {
  position: relative;
  z-index: 1;
  max-width: 44rem;
  margin: clamp(1.1rem, 3vw, 1.75rem) 0 0;
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.85;
  color: var(--k-mist);
}

.page-about .about-hero__facts {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  padding-top: 1rem;
  border-top: 1px solid var(--k-line);
  font-family: var(--k-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--k-mist);
}

.page-about .about-body {
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-body__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  align-items: start;
}

/* 左侧章节索引 */
.page-about .about-index {
  border-bottom: 1px solid var(--k-line);
  padding-bottom: 1.25rem;
}

.page-about .about-index__title {
  margin: 0 0 0.75rem;
  font-family: var(--k-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--k-mist);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  gap: 0.1rem;
  border-left: 1px solid var(--k-line);
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-left: -1px;
  padding: 0.4rem 0 0.4rem 0.85rem;
  border-left: 2px solid transparent;
  color: var(--k-mist);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color 0.22s var(--k-ease), border-color 0.22s var(--k-ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--k-paper);
  border-left-color: var(--k-lime);
}

.page-about .about-index__num {
  font-family: var(--k-mono);
  font-size: 0.72rem;
  color: var(--k-line);
}

.page-about .about-index__years {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
  font-size: 0.78rem;
  color: var(--k-mist);
}

.page-about .about-index__years li {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.page-about .about-index__years span {
  font-family: var(--k-mono);
  font-size: 0.86rem;
  color: var(--k-paper);
}

/* 正文区块 */
.page-about .about-sec + .about-sec {
  margin-top: clamp(2.25rem, 5vw, 3.75rem);
  padding-top: clamp(2rem, 4vw, 3rem);
  border-top: 1px solid var(--k-line);
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  margin-bottom: clamp(1rem, 2.5vw, 1.5rem);
}

.page-about .about-sec__num {
  flex: none;
  font-family: var(--k-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--k-lime);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--k-sans);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.4vw, 2.3rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
  color: var(--k-paper);
}

.page-about .about-prose {
  max-width: 40rem;
  color: var(--k-mist);
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .about-prose p {
  margin: 0 0 1.05em;
}

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

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

.page-about .about-prose--tight {
  margin-top: clamp(1.1rem, 3vw, 1.6rem);
}

.page-about .about-duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

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

.page-about .about-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  object-fit: cover;
  background: var(--k-panel);
}

.page-about .about-fig figcaption {
  margin-top: 0.6rem;
  font-family: var(--k-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--k-mist);
}

.page-about .about-fig--wide {
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
}

/* 四条内容线 */
.page-about .about-lines {
  list-style: none;
  margin: clamp(1.3rem, 3vw, 1.8rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--k-line);
}

.page-about .about-line {
  display: grid;
  grid-template-columns: 1.9rem minmax(0, 1fr);
  gap: 0 0.85rem;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--k-line);
}

.page-about .about-line__k {
  font-family: var(--k-mono);
  font-size: 0.8rem;
  color: var(--k-lime);
  padding-top: 0.15rem;
}

.page-about .about-line h3 {
  margin: 0 0 0.3rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--k-paper);
}

.page-about .about-line p {
  margin: 0;
  max-width: 36rem;
  color: var(--k-mist);
  font-size: 0.94rem;
  line-height: 1.72;
}

.page-about .about-line__meta {
  grid-column: 2;
  margin-top: 0.5rem;
  font-family: var(--k-mono);
  font-size: 0.71rem;
  letter-spacing: 0.08em;
  color: var(--k-amber);
}

/* 团队岗位 */
.page-about .about-rolesLead {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0 0 1.25rem;
  color: var(--k-mist);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .about-rolesLead__n {
  font-family: var(--k-mono);
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--k-lime);
}

.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--k-line);
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  overflow: hidden;
}

.page-about .about-role {
  padding: clamp(1.1rem, 3vw, 1.75rem);
  background: var(--k-panel);
}

.page-about .about-role__n {
  display: block;
  font-family: var(--k-mono);
  font-size: 1.9rem;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--k-paper);
}

.page-about .about-role h3 {
  margin: 0.55rem 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--k-lime);
}

.page-about .about-role p {
  margin: 0;
  color: var(--k-mist);
  font-size: 0.92rem;
  line-height: 1.75;
}

.page-about .about-figures {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem 2.5rem;
  margin-top: clamp(1.4rem, 3.5vw, 2rem);
  padding-top: 1.1rem;
  border-top: 1px solid var(--k-line);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0;
  min-width: 8.5rem;
}

.page-about .about-figure__n {
  font-family: var(--k-mono);
  font-size: clamp(1.35rem, 3vw, 1.7rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--k-amber);
}

.page-about .about-figure__c {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--k-mist);
}

/* 时间轴 */
.page-about .about-seasons {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  margin-top: clamp(1.2rem, 3vw, 1.75rem);
  align-items: start;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.35rem;
  border-left: 1px solid var(--k-line);
}

.page-about .about-timeline li {
  position: relative;
  padding-bottom: 1.85rem;
}

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

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  top: 0.55rem;
  left: -1.35rem;
  width: 0.62rem;
  height: 0.62rem;
  border: 2px solid var(--k-lime);
  border-radius: 50%;
  background: var(--k-ink);
  transform: translateX(-50%);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 0.25rem;
  font-family: var(--k-mono);
  font-size: 1.3rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--k-lime);
}

.page-about .about-timeline h3 {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--k-paper);
}

.page-about .about-timeline p {
  margin: 0;
  max-width: 34rem;
  color: var(--k-mist);
  font-size: 0.92rem;
  line-height: 1.75;
}

.page-about .about-seasons__fig img {
  border-radius: var(--k-radius);
}

/* 合作与标准 */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: clamp(1.3rem, 3vw, 1.8rem);
}

.page-about .about-partner {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0;
  padding: 0.85rem 0 0.85rem 1rem;
  border-left: 2px solid var(--k-amber);
  color: var(--k-mist);
  font-size: 0.94rem;
  line-height: 1.7;
}

.page-about .about-partner__n {
  font-family: var(--k-mono);
  font-size: clamp(1.7rem, 4vw, 2.2rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--k-paper);
}

.page-about .about-quote {
  margin: clamp(1.4rem, 3.5vw, 2rem) 0 0;
  padding: clamp(1.3rem, 4vw, 2.3rem);
  background: var(--k-wine);
  border-radius: var(--k-radius);
}

.page-about .about-quote p {
  margin: 0;
  max-width: 34rem;
  font-size: clamp(1.02rem, 2.1vw, 1.28rem);
  line-height: 1.65;
  letter-spacing: -0.01em;
  color: var(--k-paper);
}

/* 结尾入口 */
.page-about .about-cta {
  margin-top: clamp(2.25rem, 5vw, 3.75rem);
  padding: clamp(1.5rem, 4vw, 2.6rem);
  border: 1px solid var(--k-line);
  border-radius: var(--k-radius);
  background:
    linear-gradient(135deg, rgba(39, 36, 71, 0.75) 0%, rgba(7, 28, 22, 0) 62%),
    var(--k-panel);
}

.page-about .about-cta__title {
  margin: 0 0 0.7rem;
  font-family: var(--k-sans);
  font-weight: 800;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--k-paper);
}

.page-about .about-cta__text {
  max-width: 36rem;
  margin: 0 0 1.4rem;
  color: var(--k-mist);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

@media (min-width: 700px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-body__inner {
    grid-template-columns: 12.5rem minmax(0, 1fr);
    gap: clamp(2rem, 4.5vw, 4rem);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--k-header-h) + 1.5rem);
    border-bottom: 0;
    padding-bottom: 0;
  }

  .page-about .about-seasons {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: clamp(1.75rem, 4vw, 3rem);
  }

  .page-about .about-seasons__fig {
    position: sticky;
    top: calc(var(--k-header-h) + 1.5rem);
  }

  .page-about .about-line {
    grid-template-columns: 1.9rem minmax(0, 1fr) 8.5rem;
    align-items: baseline;
  }

  .page-about .about-line__meta {
    grid-column: 3;
    margin-top: 0;
    text-align: right;
  }
}

@media (min-width: 1000px) {
  .page-about .about-duo {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: clamp(1.75rem, 4vw, 3rem);
  }

  .page-about .about-duo .about-prose {
    max-width: 34rem;
  }
}

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