.page-about {
  --ab-rail: 168px;
  --ab-line-sand: rgba(232, 220, 198, 0.18);
  --ab-line-ink: rgba(18, 33, 29, 0.16);
  background: var(--kt-ink);
  color: var(--kt-sand);
  font-family: var(--kt-font-body);
}

.page-about .ab-crumbs {
  padding-top: 26px;
  padding-bottom: 10px;
}

.page-about .kt-crumbs {
  color: rgba(232, 220, 198, 0.62);
  font-family: var(--kt-font-index);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-about .kt-crumbs a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--kt-t) var(--kt-e), border-color var(--kt-t) var(--kt-e);
}

.page-about .kt-crumbs a:hover,
.page-about .kt-crumbs a:focus-visible {
  color: var(--kt-cyan);
  border-bottom-color: var(--kt-cyan);
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  padding: 20px 0 56px;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 40px;
  align-items: end;
}

.page-about .ab-kicker {
  margin: 0 0 14px;
  font-family: var(--kt-font-index);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--kt-cyan);
}

.page-about .ab-kicker--ink {
  color: var(--kt-ochre);
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  font-family: var(--kt-font-display);
  font-weight: 200;
  font-size: clamp(2.4rem, 9vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--kt-paper);
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 32em;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(232, 220, 198, 0.82);
}

.page-about .ab-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--ab-line-sand);
  font-family: var(--kt-font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(232, 220, 198, 0.66);
}

.page-about .ab-hero__metaItem b {
  color: var(--kt-cyan);
  font-weight: 500;
  margin-right: 4px;
}

.page-about .ab-hero__visual {
  display: grid;
  gap: 18px;
}

.page-about .ab-lanes {
  display: grid;
  gap: 10px;
}

.page-about .ab-lane {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 58px;
  padding: 0 16px;
  border-radius: var(--kt-r-sm);
  font-family: var(--kt-font-index);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.page-about .ab-lane i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.65;
}

.page-about .ab-lane--report {
  width: 88%;
  background: var(--kt-red);
  color: var(--kt-redblack);
}

.page-about .ab-lane--schedule {
  width: 100%;
  background: var(--kt-steel);
  color: var(--kt-ice);
}

.page-about .ab-lane--case {
  width: 72%;
  background: var(--kt-ochre);
  color: var(--kt-redblack);
}

.page-about .ab-scale {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px dashed var(--ab-line-sand);
  font-family: var(--kt-font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(232, 220, 198, 0.5);
}

/* ---------- 章节骨架 ---------- */

.page-about .ab-sec {
  padding: 56px 0;
}

.page-about .ab-sec__inner {
  display: grid;
  gap: 26px;
}

.page-about .ab-sec--sand {
  background: var(--kt-sand);
  color: var(--kt-text);
}

.page-about .ab-sec--paper {
  background: var(--kt-paper);
  color: var(--kt-text);
}

.page-about .ab-sec--ink {
  background: var(--kt-ink);
  color: var(--kt-sand);
}

.page-about .ab-sec--night {
  background: var(--kt-night);
  color: var(--kt-sand);
}

.page-about .ab-sec--cut {
  clip-path: polygon(0 52px, 100% 0, 100% 100%, 0 100%);
  padding-top: 96px;
}

.page-about .ab-rail {
  align-self: start;
}

.page-about .ab-rail__stick {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .ab-rail__no {
  margin: 0;
  font-family: var(--kt-font-data);
  font-size: 26px;
  font-weight: 300;
  letter-spacing: 0.02em;
  line-height: 1;
  color: rgba(18, 33, 29, 0.34);
}

.page-about .ab-sec--ink .ab-rail__no,
.page-about .ab-sec--night .ab-rail__no {
  color: rgba(232, 220, 198, 0.38);
}

.page-about .ab-rail__cap {
  margin: 0;
  font-family: var(--kt-font-index);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--kt-muted);
}

.page-about .ab-sec--ink .ab-rail__cap,
.page-about .ab-sec--night .ab-rail__cap {
  color: rgba(232, 220, 198, 0.55);
}

.page-about .ab-ruler {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin-top: 4px;
}

.page-about .ab-ruler__item {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 3px 0;
  text-decoration: none;
  color: var(--kt-muted);
  border-bottom: 1px solid transparent;
  transition: color var(--kt-t) var(--kt-e), border-color var(--kt-t) var(--kt-e);
}

.page-about .ab-ruler__item:hover,
.page-about .ab-ruler__item:focus-visible {
  color: var(--kt-text);
  border-bottom-color: var(--kt-ochre);
}

.page-about .ab-ruler__yr {
  font-family: var(--kt-font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .ab-ruler__lb {
  font-family: var(--kt-font-index);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-about .ab-h2 {
  margin: 0 0 22px;
  font-family: var(--kt-font-display);
  font-weight: 300;
  font-size: clamp(1.85rem, 5.4vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
}

.page-about .ab-sec--ink .ab-h2,
.page-about .ab-sec--night .ab-h2 {
  color: var(--kt-paper);
}

.page-about .ab-p {
  margin: 0 0 16px;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.78;
}

.page-about .ab-sec--ink .ab-p,
.page-about .ab-sec--night .ab-p {
  color: rgba(232, 220, 198, 0.8);
}

.page-about .ab-note {
  margin: 22px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--kt-cyan);
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(232, 220, 198, 0.72);
}

/* ---------- 历程 ---------- */

.page-about .ab-miles {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-line-ink);
}

.page-about .ab-mile {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 6px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--ab-line-ink);
  scroll-margin-top: 96px;
  transition: background-color var(--kt-t) var(--kt-e);
}

.page-about .ab-mile__yr {
  margin: 0;
  font-family: var(--kt-font-data);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--kt-ochre);
}

.page-about .ab-mile__t {
  margin: 0 0 6px;
  font-family: var(--kt-font-body);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--kt-text);
}

.page-about .ab-mile__d {
  margin: 0;
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--kt-muted);
}

.page-about .ab-mile:hover {
  background: rgba(169, 116, 79, 0.08);
}

/* ---------- 图片 ---------- */

.page-about .ab-fig {
  margin: 34px 0 0;
}

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

.page-about .ab-fig--top {
  margin: 0 0 30px;
}

.page-about .ab-fig__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--kt-r-md);
}

.page-about .kt-media__cap {
  margin-top: 10px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--kt-muted);
}

.page-about .ab-sec--ink .kt-media__cap,
.page-about .ab-sec--night .kt-media__cap {
  color: rgba(232, 220, 198, 0.55);
}

/* ---------- 分工索引 ---------- */

.page-about .ab-roster {
  margin-top: 26px;
  border-top: 1px solid var(--ab-line-sand);
}

.page-about .ab-roster__head {
  display: none;
}

.page-about .ab-roster__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-roster__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 16px;
  padding: 18px 12px;
  border-bottom: 1px solid var(--ab-line-sand);
  transition: background-color var(--kt-t) var(--kt-e);
}

.page-about .ab-roster__row:hover {
  background: rgba(232, 220, 198, 0.07);
}

.page-about .ab-roster__name {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--kt-font-body);
  font-size: 1rem;
  font-weight: 700;
  color: var(--kt-paper);
}

.page-about .ab-dot {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  flex: none;
}

.page-about .ab-dot--report {
  background: var(--kt-red);
}

.page-about .ab-dot--schedule {
  background: var(--kt-ice);
}

.page-about .ab-dot--case {
  background: var(--kt-ochre);
}

.page-about .ab-roster__num {
  margin: 0;
  text-align: right;
  font-family: var(--kt-font-data);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--kt-cyan);
}

.page-about .ab-roster__pace,
.page-about .ab-roster__out {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: rgba(232, 220, 198, 0.72);
}

.page-about .ab-roster__out {
  color: rgba(232, 220, 198, 0.52);
}

/* ---------- 案例方法 ---------- */

.page-about .ab-case {
  display: grid;
  gap: 28px;
}

.page-about .ab-flow {
  margin-top: 34px;
  padding: 24px 20px 8px;
  background: rgba(169, 116, 79, 0.09);
  border-radius: var(--kt-r-lg);
}

.page-about .ab-flow__svg {
  display: block;
  width: 100%;
  height: 34px;
  color: var(--kt-ochre);
  margin-bottom: 14px;
}

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

.page-about .ab-flow__step {
  padding: 14px 12px;
  border-left: 2px solid transparent;
  border-radius: var(--kt-r-sm);
  transition: background-color var(--kt-t) var(--kt-e), border-color var(--kt-t) var(--kt-e);
}

.page-about .ab-flow__step:hover,
.page-about .ab-flow__step:focus-within {
  background: rgba(246, 240, 228, 0.72);
  border-left-color: var(--kt-ochre);
}

.page-about .ab-flow__no {
  margin: 0 0 6px;
  font-family: var(--kt-font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--kt-ochre);
}

.page-about .ab-flow__t {
  margin: 0 0 6px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--kt-text);
}

.page-about .ab-flow__d {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.66;
  color: var(--kt-muted);
}

/* ---------- 出品标准 ---------- */

.page-about .ab-gates {
  display: grid;
  gap: 0;
  margin-top: 26px;
  border-top: 1px solid var(--ab-line-sand);
}

.page-about .ab-gate {
  padding: 22px 0;
  border-bottom: 1px solid var(--ab-line-sand);
}

.page-about .ab-gate__no {
  margin: 0 0 8px;
  font-family: var(--kt-font-data);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--kt-cyan);
}

.page-about .ab-gate__t {
  margin: 0 0 8px;
  font-family: var(--kt-font-display);
  font-weight: 400;
  font-size: 1.375rem;
  letter-spacing: 0.01em;
  color: var(--kt-paper);
}

.page-about .ab-gate__d {
  margin: 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(232, 220, 198, 0.75);
}

.page-about .ab-inbox {
  margin-top: 30px;
  padding: 22px 20px;
  border-radius: var(--kt-r-md);
  background: rgba(59, 240, 207, 0.07);
  border: 1px solid rgba(59, 240, 207, 0.28);
}

.page-about .ab-inbox__t {
  margin: 0 0 8px;
  font-family: var(--kt-font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--kt-cyan);
}

.page-about .ab-inbox__d {
  margin: 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(232, 220, 198, 0.8);
}

.page-about .ab-inbox__act {
  margin: 14px 0 0;
}

/* ---------- 链接与按钮 ---------- */

.page-about .ab-link {
  display: inline-block;
  color: var(--kt-cyan);
  text-decoration: none;
  font-size: 0.9375rem;
  border-bottom: 1px solid rgba(59, 240, 207, 0.45);
  transition: color var(--kt-t) var(--kt-e), border-color var(--kt-t) var(--kt-e);
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--kt-orange);
  border-bottom-color: var(--kt-orange);
}

.page-about .ab-link--ink {
  color: var(--kt-ink);
  border-bottom-color: rgba(18, 33, 29, 0.35);
}

.page-about .ab-link--ink:hover,
.page-about .ab-link--ink:focus-visible {
  color: var(--kt-ochre);
  border-bottom-color: var(--kt-ochre);
}

.page-about .ab-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
  margin-top: 26px;
}

/* ---------- 收尾 ---------- */

.page-about .ab-cta {
  position: relative;
  padding-top: 64px;
  padding-bottom: 64px;
}

.page-about .ab-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--kt-cyan) 0%, var(--kt-orange) 100%);
}

.page-about .ab-cta__h {
  max-width: 20em;
  margin-bottom: 16px;
}

.page-about .ab-cta__p {
  margin: 0 0 26px;
  max-width: 32em;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(232, 220, 198, 0.78);
}

.page-about .ab-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-cta__back {
  margin: 22px 0 0;
  font-size: 0.875rem;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .ab-roster__row {
    grid-template-columns: 1.2fr 1.1fr;
    padding: 20px 16px;
  }

  .page-about .ab-roster__pace,
  .page-about .ab-roster__out {
    grid-column: auto;
  }

  .page-about .ab-roster__num {
    text-align: left;
  }

  .page-about .ab-flow__list {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .page-about .ab-gates {
    grid-template-columns: repeat(3, 1fr);
    gap: 0 26px;
    border-top: 1px solid var(--ab-line-sand);
  }

  .page-about .ab-gate {
    border-bottom: 0;
    border-top: 1px solid transparent;
  }
}

@media (min-width: 900px) {
  .page-about .ab-crumbs {
    padding-top: 34px;
  }

  .page-about .ab-hero {
    padding: 28px 0 76px;
  }

  .page-about .ab-hero__grid {
    grid-template-columns: 1.12fr 0.88fr;
    gap: 64px;
    align-items: end;
  }

  .page-about .ab-lane {
    height: 64px;
  }

  .page-about .ab-sec {
    padding: 88px 0;
  }

  .page-about .ab-sec--cut {
    padding-top: 128px;
  }

  .page-about .ab-sec__inner {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .ab-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-rail__stick {
    display: block;
  }

  .page-about .ab-rail__cap {
    margin-top: 8px;
  }

  .page-about .ab-ruler {
    display: block;
    margin-top: 18px;
    padding-left: 12px;
    border-left: 1px solid var(--ab-line-ink);
  }

  .page-about .ab-sec--ink .ab-ruler,
  .page-about .ab-sec--night .ab-ruler {
    border-left-color: var(--ab-line-sand);
  }

  .page-about .ab-ruler__item {
    display: flex;
    margin-bottom: 10px;
  }

  .page-about .ab-mile {
    grid-template-columns: 88px 1fr;
    padding: 24px 0;
  }

  .page-about .ab-mile__yr {
    font-size: 15px;
  }

  .page-about .ab-mile__t {
    font-size: 1.0625rem;
  }

  .page-about .ab-roster__head {
    display: grid;
    grid-template-columns: 1.2fr 0.6fr 1.35fr 1.35fr;
    gap: 24px;
    padding: 12px 16px;
    font-family: var(--kt-font-index);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: rgba(232, 220, 198, 0.45);
  }

  .page-about .ab-roster__row {
    grid-template-columns: 1.2fr 0.6fr 1.35fr 1.35fr;
    gap: 24px;
    align-items: baseline;
    padding: 22px 16px;
  }

  .page-about .ab-roster__num {
    text-align: left;
  }

  .page-about .ab-case {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .ab-flow {
    margin-top: 40px;
    padding: 30px 26px 22px;
  }

  .page-about .ab-flow__list {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .ab-flow__svg {
    height: 46px;
    margin-bottom: 18px;
  }

  .page-about .ab-inbox {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr) auto;
    align-items: center;
    gap: 20px 28px;
    padding: 26px 28px;
  }

  .page-about .ab-inbox__t {
    margin: 0;
    font-size: 1rem;
  }

  .page-about .ab-inbox__act {
    margin: 0;
  }

  .page-about .ab-cta {
    padding-top: 86px;
    padding-bottom: 86px;
  }

  .page-about .ab-cta__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 18px 56px;
    align-items: center;
  }

  .page-about .ab-cta__h {
    grid-column: 1;
    grid-row: 1;
    margin-bottom: 0;
  }

  .page-about .ab-cta__p {
    grid-column: 1;
    grid-row: 2;
    margin-bottom: 0;
  }

  .page-about .ab-cta__acts {
    grid-column: 2;
    grid-row: 1 / span 2;
    justify-content: flex-end;
  }

  .page-about .ab-cta__back {
    grid-column: 1 / -1;
    grid-row: 3;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .kt-crumbs a,
  .page-about .ab-ruler__item,
  .page-about .ab-mile,
  .page-about .ab-roster__row,
  .page-about .ab-flow__step,
  .page-about .ab-link {
    transition: none;
  }
}
<<<END>>>