.page-about {
  --about-sec: clamp(40px, 6vw, 78px);
  --about-gap: clamp(18px, 3vw, 32px);
  background: var(--cream);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--night);
  color: var(--cream);
  padding: clamp(18px, 3vw, 30px) 0 clamp(40px, 6vw, 76px);
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(244, 235, 221, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 235, 221, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -34%;
  width: 52%;
  height: 130%;
  background: linear-gradient(160deg, rgba(217, 164, 91, 0.24), rgba(224, 107, 53, 0.04));
  transform: rotate(-10deg);
  pointer-events: none;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__list li,
.page-about .about-hero .breadcrumb__list li[aria-current="page"] {
  color: rgba(244, 235, 221, 0.68);
  text-decoration: none;
}
.page-about .about-hero .breadcrumb__link:hover,
.page-about .about-hero .breadcrumb__link:focus-visible {
  color: var(--mint);
}
.page-about .about-hero__title {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.01em;
}
.page-about .about-hero__lead {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: rgba(244, 235, 221, 0.82);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px clamp(14px, 3vw, 36px);
  margin: clamp(26px, 4vw, 44px) 0 0;
}
.page-about .about-hero__stat {
  display: flex;
  flex-direction: column-reverse;
  padding-left: 14px;
  border-left: 1px solid rgba(244, 235, 221, 0.22);
}
.page-about .about-hero__stat dt {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(244, 235, 221, 0.6);
}
.page-about .about-hero__stat dd {
  margin: 0;
  line-height: 1.1;
}
.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  letter-spacing: -0.02em;
  color: var(--mint);
}
.page-about .about-hero__unit {
  margin-left: 4px;
  font-size: 12px;
  color: rgba(244, 235, 221, 0.7);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(10px, 2vw, 24px);
  padding-top: clamp(26px, 4vw, 46px);
  padding-bottom: clamp(40px, 6vw, 76px);
}
.page-about .about-sections {
  min-width: 0;
}
.page-about .about-rail {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 16px;
}
.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--stone);
}
.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  color: var(--stone);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--ink);
  border-color: var(--clay);
  background: var(--cream-deep);
}
.page-about .about-rail__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--clay);
}

.page-about .about-section {
  padding: 0 0 var(--about-sec);
  scroll-margin-top: 96px;
}
.page-about .about-section + .about-section {
  padding-top: var(--about-sec);
  border-top: 1px solid var(--line-soft);
}
.page-about .about-section__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--clay);
}
.page-about .about-section__title {
  margin: 0;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.16;
  color: var(--ink);
}
.page-about .about-section__lead {
  margin: clamp(12px, 2vw, 18px) 0 0;
  max-width: 38em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(17, 22, 28, 0.84);
}
.page-about .about-p {
  margin: clamp(12px, 2vw, 16px) 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.85;
  color: rgba(17, 22, 28, 0.86);
}
.page-about .about-link {
  color: var(--clay);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--poplar);
}
.page-about .about-note {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 34em;
  padding: 10px 0 10px 16px;
  border-left: 2px solid var(--sand);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 组织示意 ---------- */
.page-about .about-org {
  display: block;
  width: 100%;
  height: auto;
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 560px;
}
.page-about .about-org__line {
  stroke: var(--line);
  stroke-width: 1;
  fill: none;
}
.page-about .about-org__box {
  fill: var(--cream-deep);
  stroke: var(--stone);
  stroke-width: 1;
  stroke-opacity: 0.45;
}
.page-about .about-org__name {
  fill: var(--ink);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
}
.page-about .about-org__meta {
  fill: var(--stone);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
}

/* ---------- 小组清单 ---------- */
.page-about .about-crews {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-crew {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-crew__idx {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--sand);
}
.page-about .about-crew__name {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
}
.page-about .about-crew__text {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(17, 22, 28, 0.8);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  background: var(--cream-deep);
  object-fit: cover;
}
.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.1em;
  color: var(--stone);
}

/* ---------- 四道关 ---------- */
.page-about .about-steps {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}
.page-about .about-step {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 6px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-step__no {
  grid-column: 1;
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--clay);
}
.page-about .about-step__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.3;
}
.page-about .about-step__text {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(17, 22, 28, 0.8);
}

/* ---------- 资料更新节奏 ---------- */
.page-about .about-emphasis {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: clamp(18px, 3vw, 26px) clamp(16px, 3vw, 26px);
  background: var(--cream-deep);
  border-left: 3px solid var(--moss);
}
.page-about .about-emphasis__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--moss);
}
.page-about .about-emphasis ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-emphasis li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(17, 22, 28, 0.84);
}
.page-about .about-emphasis li + li {
  margin-top: 6px;
}
.page-about .about-emphasis li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 1px;
  background: var(--moss);
}

/* ---------- 历程 ---------- */
.page-about .about-timeline {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .about-tl {
  position: relative;
  padding: 20px 0 20px 24px;
  border-bottom: 1px solid var(--line-soft);
}
.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 0;
  top: 28px;
  width: 8px;
  height: 8px;
  background: var(--sand);
  transition: background-color 0.2s ease, transform 0.2s ease;
}
.page-about .about-tl:hover::before,
.page-about .about-tl:focus-within::before {
  background: var(--poplar);
  transform: scale(1.25);
}
.page-about .about-tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--indigo);
}
.page-about .about-tl__label {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.35;
}
.page-about .about-tl__text {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(17, 22, 28, 0.8);
}

/* ---------- 覆盖数据 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-metric {
  background: var(--cream);
  padding: 16px 14px;
}
.page-about .about-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--indigo);
}
.page-about .about-metric__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--stone);
}

/* ---------- 咨询与纠错 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: var(--indigo);
  color: var(--cream);
  padding: clamp(36px, 6vw, 72px) 0;
}
.page-about .about-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(224, 107, 53, 0.3) 0%, rgba(224, 107, 53, 0) 48%);
  pointer-events: none;
}
.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-cta__title {
  margin: 12px 0 0;
  max-width: 18em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.2;
}
.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 235, 221, 0.82);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 22px;
  margin-top: clamp(20px, 3vw, 28px);
}
.page-about .about-cta__link {
  font-size: 14px;
  color: var(--sand);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  color: var(--mint);
}
.page-about .about-cta__contact {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(244, 235, 221, 0.18);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: rgba(244, 235, 221, 0.75);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-crew {
    grid-template-columns: 2.5rem 9.5rem minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-crew__idx {
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .about-crew__name {
    grid-column: 2;
    grid-row: 1;
  }
  .page-about .about-crew__text {
    grid-column: 3;
    grid-row: 1;
  }
  .page-about .about-step {
    grid-template-columns: 3.5rem 9rem minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-step__no {
    grid-column: 1;
    grid-row: 1;
  }
  .page-about .about-step__title {
    grid-column: 2;
    grid-row: 1;
  }
  .page-about .about-step__text {
    grid-column: 3;
    grid-row: 1;
  }
}

@media (min-width: 880px) {
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: none;
  }
  .page-about .about-tl {
    padding: 26px 18px 0 0;
    border-bottom: none;
    border-right: 1px solid var(--line-soft);
  }
  .page-about .about-tl:last-child {
    border-right: none;
    padding-right: 0;
  }
  .page-about .about-tl::before {
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
  }
  .page-about .about-tl__year {
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: 190px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: 92px;
    padding: 0 0 0 20px;
    border-bottom: none;
    border-left: 1px solid var(--line-soft);
  }
  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
  .page-about .about-rail__link {
    display: flex;
    width: 100%;
    padding: 9px 0;
    border: none;
    border-bottom: 1px solid var(--line-soft);
    background: none;
  }
  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: none;
    color: var(--indigo);
    padding-left: 4px;
  }
}
<<<END>>>