.page-about {
  --about-pad: clamp(56px, 9vw, 116px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--deep);
  color: var(--paper);
  padding: calc(var(--header-h) + 48px) 0 var(--about-pad);
  isolation: isolate;
}
.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
  z-index: -2;
}
.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(11, 60, 74, 0.9) 0%, rgba(11, 60, 74, 0.55) 42%, rgba(11, 60, 74, 0.96) 100%),
    linear-gradient(105deg, rgba(11, 60, 74, 0.92) 0%, rgba(11, 60, 74, 0.2) 70%);
}
.page-about .about-hero__inner {
  position: relative;
}
.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(28px, 5vw, 52px);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(247, 243, 234, 0.62);
}
.page-about .about-hero .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 0.6em;
  color: rgba(247, 243, 234, 0.35);
}
.page-about .about-hero .breadcrumb a {
  color: rgba(247, 243, 234, 0.82);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  border-bottom-color: var(--yellow);
}
.page-about .about-hero__eyebrow {
  color: var(--yellow);
  margin-bottom: 18px;
}
.page-about .about-hero__title {
  margin: 0 0 clamp(22px, 3vw, 34px);
  color: var(--paper);
  max-width: 15ch;
  letter-spacing: 0.02em;
}
.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 0 0 clamp(34px, 5vw, 60px);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.85;
  color: rgba(247, 243, 234, 0.86);
}

/* 首屏章节索引：看台台阶式错落 */
.page-about .about-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid rgba(247, 243, 234, 0.2);
  padding-top: 22px;
}
.page-about .about-index__item a {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 10px 14px;
  color: rgba(247, 243, 234, 0.86);
  text-decoration: none;
  border: 1px solid rgba(247, 243, 234, 0.16);
  border-radius: var(--radius);
  background: rgba(247, 243, 234, 0.04);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}
.page-about .about-index__item a:hover,
.page-about .about-index__item a:focus-visible {
  background: rgba(232, 106, 51, 0.16);
  border-color: var(--orange);
  transform: translateX(4px);
}
.page-about .about-index__no {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--yellow);
}
.page-about .about-index__text {
  font-size: 0.95rem;
}

@media (min-width: 720px) {
  .page-about .about-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1000px) {
  .page-about .about-index {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-top: none;
    padding-top: 0;
  }
  .page-about .about-index__item:nth-child(2) a { margin-top: 12px; }
  .page-about .about-index__item:nth-child(3) a { margin-top: 24px; }
  .page-about .about-index__item:nth-child(4) a { margin-top: 36px; }
  .page-about .about-index__item:nth-child(5) a { margin-top: 48px; }
  .page-about .about-index__item a { flex-direction: column; gap: 8px; align-items: flex-start; }
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: var(--about-pad) 0;
  position: relative;
}
.page-about .about-block--paper {
  background: var(--paper);
  color: var(--ink);
}
.page-about .about-block--deep {
  background: var(--deep);
  color: var(--paper);
}
.page-about .about-block--wine {
  background: var(--wine);
  color: #fff;
}
.page-about .about-block--indigo {
  background: var(--indigo);
  color: #fff;
}
.page-about .about-block--stack::before {
  content: "";
  position: absolute;
  inset: 12px 12px auto auto;
  width: 46%;
  height: 6px;
  background: var(--line);
  opacity: 0.7;
}
.page-about .about-h2 {
  margin: 0 0 18px;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--ink);
}
.page-about .about-h2--light {
  color: var(--paper);
}
.page-about .about-head {
  max-width: 760px;
  margin-bottom: clamp(32px, 5vw, 56px);
}
.page-about .about-head__lead {
  margin: 0;
  line-height: 1.8;
  font-size: 1rem;
  color: rgba(26, 35, 40, 0.78);
}
.page-about .about-block--deep .about-head__lead,
.page-about .about-block--wine .about-head__lead {
  color: rgba(247, 243, 234, 0.82);
}
.page-about .chapter-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ink);
  border: 1px solid currentColor;
  border-radius: var(--radius);
  padding: 5px 12px;
}
.page-about .chapter-tag--light {
  color: var(--yellow);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 28px;
}
.page-about .about-origin__body p {
  margin: 0 0 18px;
  line-height: 1.85;
}
.page-about .about-pull {
  margin: 26px 0 !important;
  padding-left: 20px;
  border-left: 4px solid var(--orange);
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  line-height: 1.6;
  font-weight: 700;
  color: var(--deep);
}
@media (min-width: 900px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(32px, 6vw, 84px);
    align-items: start;
  }
  .page-about .about-origin__col {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}
.page-about .about-team__body p {
  margin: 0;
  line-height: 1.85;
  color: rgba(247, 243, 234, 0.86);
}
.page-about .about-roles {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .about-roles li {
  padding: 16px 18px;
  border-left: 3px solid var(--turquoise);
  background: rgba(247, 243, 234, 0.06);
  line-height: 1.75;
  font-size: 0.95rem;
  color: rgba(247, 243, 234, 0.88);
}
.page-about .about-roles strong {
  color: var(--yellow);
  margin-right: 6px;
}
.page-about .about-team .image-frame {
  background: rgba(247, 243, 234, 0.08);
  border: 1px solid rgba(247, 243, 234, 0.18);
}
.page-about .about-team .image-frame__caption {
  color: rgba(247, 243, 234, 0.72);
}
@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__line {
  display: block;
  width: 100%;
  height: 60px;
  color: var(--orange);
  margin-bottom: 12px;
  opacity: 0.85;
}
.page-about .about-timeline {
  display: grid;
  gap: 30px;
}
.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-years__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  font-size: 0.86rem;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}
.page-about .about-years__no {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange);
}
.page-about .about-nodes {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 2px solid var(--line);
  display: grid;
  gap: 30px;
}
.page-about .about-node {
  position: relative;
  padding-bottom: 6px;
}
.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--orange);
}
.page-about .about-node__year {
  display: block;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--orange);
  margin-bottom: 6px;
}
.page-about .about-node__title {
  margin: 0 0 10px;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
  line-height: 1.3;
  color: var(--ink);
}
.page-about .about-node p {
  margin: 0;
  line-height: 1.85;
  color: rgba(26, 35, 40, 0.8);
}
@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
  .page-about .about-years {
    flex-direction: column;
    flex-wrap: nowrap;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
  .page-about .about-years__link {
    justify-content: space-between;
    width: 100%;
  }
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}
.page-about .about-scale__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: rgba(255, 255, 255, 0.22);
}
.page-about .about-figure {
  background: var(--wine);
  padding: clamp(16px, 3vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 120px;
  justify-content: center;
}
.page-about .about-figure__num {
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 600;
  line-height: 1;
  color: var(--yellow);
}
.page-about .about-figure__label {
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.82);
}
.page-about .about-scale__side p {
  margin: 18px 0 0;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.86);
}
.page-about .about-scale .image-frame {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.28);
}
.page-about .about-scale .image-frame__caption {
  color: rgba(255, 255, 255, 0.78);
}
@media (min-width: 900px) {
  .page-about .about-scale {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .about-scale__figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 规矩：纸张叠层展签 ---------- */
.page-about .about-plates {
  display: grid;
  gap: 16px;
}
.page-about .about-plate {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--deep);
  border-radius: var(--radius);
  padding: 24px 22px 26px;
  box-shadow: 6px 6px 0 rgba(217, 226, 227, 0.55);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about .about-plate:hover {
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 rgba(232, 106, 51, 0.24);
}
.page-about .about-plate .plate__label {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  padding: 4px 10px;
  margin-bottom: 14px;
  color: var(--ink);
  background: var(--yellow);
  border-radius: var(--radius);
}
.page-about .about-plate:nth-child(2) { border-top-color: var(--turquoise); }
.page-about .about-plate:nth-child(3) { border-top-color: var(--wine); }
.page-about .about-plate:nth-child(4) { border-top-color: var(--indigo); }
.page-about .about-plate h3 {
  margin: 0 0 10px;
  font-size: 1.12rem;
  line-height: 1.4;
  color: var(--ink);
}
.page-about .about-plate p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: rgba(26, 35, 40, 0.78);
}
@media (min-width: 720px) {
  .page-about .about-plates {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
  .page-about .about-plate:nth-child(even) {
    margin-top: 26px;
  }
}

/* ---------- 出口 ---------- */
.page-about .about-reach {
  display: grid;
  gap: 26px;
}
.page-about .about-reach__eyebrow {
  color: var(--yellow);
  margin-bottom: 14px;
}
.page-about .about-reach__lead {
  margin: 0 0 26px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.85);
  max-width: 46ch;
}
.page-about .about-reach__meta {
  margin: 0;
  display: grid;
  gap: 2px;
  background: rgba(255, 255, 255, 0.18);
  align-self: start;
}
.page-about .about-reach__meta > div {
  background: var(--indigo);
  padding: 14px 18px;
}
.page-about .about-reach__meta dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--yellow);
  margin-bottom: 6px;
}
.page-about .about-reach__meta dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: 0.92rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.92);
  word-break: break-word;
}
@media (min-width: 900px) {
  .page-about .about-reach {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 图片响应 ---------- */
.page-about .image-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__item a,
  .page-about .about-plate {
    transition: none;
  }
  .page-about .about-index__item a:hover,
  .page-about .about-plate:hover {
    transform: none;
  }
}
<<<END>>>