.page-about {
  --about-line-ink: rgba(11, 31, 58, .14);
  --about-rail-w: 172px;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-main { min-width: 0; }
.page-about .about-cols > * { min-width: 0; }

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--deep-sea);
  color: var(--paper);
  padding: calc(var(--header-h) + 28px) 0 56px;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 52px) 0 96px;
  }
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(169, 184, 203, .085) 1px, transparent 1px);
  background-size: 72px 100%;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 88% 10%, rgba(255, 106, 31, .22), transparent 52%);
  pointer-events: none;
}

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

.page-about .about-hero__crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
}

.page-about .about-hero__crumb li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--mist);
}

.page-about .about-hero__crumb li + li::before {
  content: "/";
  color: var(--relay-blue);
}

.page-about .about-hero__crumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color .16s var(--ease);
}

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

.page-about .about-hero__crumb [aria-current="page"] {
  color: var(--paper);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--flame);
}

.page-about .about-hero h1 {
  margin: 0;
  max-width: 19ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(33px, 7vw, 76px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 24px 0 0;
  max-width: 58ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-hero__lede { font-size: 18px; }
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 40px 0 0;
  background: rgba(169, 184, 203, .22);
  border: 1px solid rgba(169, 184, 203, .22);
}

@media (min-width: 780px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 52px;
  }
}

.page-about .about-hero__stat {
  background: var(--deep-sea);
  padding: 18px 16px 20px;
}

.page-about .about-hero__stat dt {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-about .about-hero__stat dd {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0;
  font-family: var(--font-mono);
}

.page-about .about-hero__val {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.page-about .about-hero__unit {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-top: 40px;
  padding-bottom: 44px;
}

@media (min-width: 960px) {
  .page-about .about-cols {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 56px;
    padding-top: 76px;
    padding-bottom: 80px;
    align-items: start;
  }
}

.page-about .about-rail { margin-bottom: 4px; }
.page-about .about-rail__title { display: none; }

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 0 0 28px;
  padding: 0 0 6px;
  list-style: none;
  scrollbar-width: none;
}

.page-about .about-rail__list::-webkit-scrollbar { display: none; }

.page-about .about-rail__list li { flex: 0 0 auto; }

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--about-line-ink);
  font-size: 13px;
  color: var(--deep-sea);
  text-decoration: none;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .about-rail__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--flame);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--flame);
  border-color: var(--flame);
}

@media (min-width: 960px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 40px);
    margin-bottom: 0;
  }

  .page-about .about-rail__title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--mist);
  }

  .page-about .about-rail__list {
    display: block;
    overflow: visible;
    margin: 0;
    padding: 0;
    border-left: 1px solid var(--about-line-ink);
  }

  .page-about .about-rail__list li { display: block; }

  .page-about .about-rail__list a {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-left: -1px;
    padding: 9px 0 9px 16px;
    border: 0;
    border-left: 2px solid transparent;
    font-size: 14px;
    color: var(--deep-sea);
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    color: var(--flame);
    border-left-color: var(--flame);
  }
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  padding: 40px 0;
  border-top: 1px solid var(--about-line-ink);
}

.page-about .about-main > .about-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

@media (min-width: 900px) {
  .page-about .about-sec { padding: 56px 0; }
  .page-about .about-main > .about-sec:first-child { padding-top: 0; }
}

.page-about .about-sec__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--flame);
}

.page-about .about-sec__title {
  margin: 0 0 26px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--deep-sea);
}

.page-about .about-sec__body p {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
}

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

/* ---------- 图片容器 ---------- */
.page-about .img-frame {
  overflow: hidden;
  background: var(--night-blue);
}

.page-about .img-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .img-frame--16x9 { aspect-ratio: 16 / 9; }
.page-about .img-frame--4x3 { aspect-ratio: 4 / 3; }
.page-about .img-frame--1x1 { aspect-ratio: 1 / 1; }

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

.page-about .about-figure figcaption,
.page-about .about-flow__figure figcaption,
.page-about .about-partners__figure figcaption {
  margin-top: 12px;
  max-width: 58ch;
  font-size: 13px;
  line-height: 1.65;
  color: var(--relay-blue);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line-ink);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--about-line-ink);
}

@media (min-width: 780px) {
  .page-about .about-timeline__item {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 36px;
    padding: 28px 0;
  }
}

.page-about .about-timeline__year {
  position: relative;
  display: block;
  padding-left: 17px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--deep-sea);
}

.page-about .about-timeline__year::before {
  content: "";
  position: absolute;
  left: 0;
  top: .34em;
  width: 7px;
  height: 7px;
  background: var(--flame);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--deep-sea);
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
}

.page-about .about-timeline__media {
  display: block;
  padding: 6px 0 30px;
  border-bottom: 1px solid var(--about-line-ink);
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 44px;
    align-items: start;
  }
}

.page-about .about-flow__intro {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
}

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

.page-about .about-flow__steps li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--about-line-ink);
}

.page-about .about-flow__steps li:last-child {
  border-bottom: 1px solid var(--about-line-ink);
}

.page-about .about-flow__num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--flame);
}

.page-about .about-flow__item h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--deep-sea);
}

.page-about .about-flow__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .about-flow__note {
  margin: 22px 0 0;
  max-width: 54ch;
  padding-left: 14px;
  border-left: 2px solid var(--flame);
  font-size: 14px;
  line-height: 1.7;
  color: var(--deep-sea);
}

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

/* ---------- 深色团队块 ---------- */
.page-about .about-block {
  padding: 40px 24px;
  border-top: 1px solid var(--about-line-ink);
}

@media (min-width: 900px) {
  .page-about .about-block { padding: 56px 44px; }
}

.page-about .about-block--dark {
  margin: 8px 0;
  border-top: 0;
  background: var(--deep-sea);
  color: var(--paper);
}

.page-about .about-block--dark .about-sec__title { color: var(--paper); }

.page-about .about-block--dark .about-sec__eyebrow { color: var(--flame-soft); }

.page-about .about-block__lede {
  margin: 0 0 34px;
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--mist);
}

.page-about .about-numbers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px 20px;
  margin: 0;
}

@media (min-width: 760px) {
  .page-about .about-numbers {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px 24px;
  }
}

.page-about .about-numbers > div {
  padding-top: 16px;
  border-top: 1px solid rgba(169, 184, 203, .32);
}

.page-about .about-numbers dt {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-numbers__value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0;
}

.page-about .about-numbers__val {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.page-about .about-numbers__unit {
  font-size: 13px;
  color: var(--paper);
}

.page-about .about-numbers__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

@media (min-width: 900px) {
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 44px;
    align-items: start;
  }
}

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

.page-about .about-partners__list li {
  padding: 18px 0;
  border-top: 1px solid var(--about-line-ink);
}

.page-about .about-partners__list li:last-child {
  border-bottom: 1px solid var(--about-line-ink);
}

.page-about .about-partners__list h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--deep-sea);
}

.page-about .about-partners__list p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

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

/* ---------- 做事方式 ---------- */
.page-about .about-values {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-value {
  padding: 22px 0;
  border-top: 1px solid var(--about-line-ink);
  outline: none;
}

.page-about .about-value:last-child {
  border-bottom: 1px solid var(--about-line-ink);
}

.page-about .about-value:focus-visible {
  box-shadow: inset 3px 0 0 var(--flame);
}

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

.page-about .about-value__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--flame);
}

.page-about .about-value__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--deep-sea);
}

.page-about .about-value__body {
  margin: 10px 0 0 26px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink);
}

.page-about .about-value__note {
  margin: 12px 0 0 26px;
  padding-left: 14px;
  border-left: 2px solid var(--flame);
  font-size: 14px;
  line-height: 1.65;
  color: var(--relay-blue);
  overflow: hidden;
}

@media (hover: hover) and (pointer: fine) {
  .page-about .about-value__note {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    border-left-color: transparent;
    transition: max-height .26s var(--ease), opacity .2s var(--ease),
                margin-top .22s var(--ease), border-left-color .2s var(--ease);
  }

  .page-about .about-value:hover .about-value__note,
  .page-about .about-value:focus-within .about-value__note {
    max-height: 220px;
    margin-top: 12px;
    opacity: 1;
    border-left-color: var(--flame);
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-outro {
  position: relative;
  overflow: hidden;
  background: var(--night-blue);
  color: var(--paper);
  padding: 48px 0 56px;
}

.page-about .about-outro::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--flame) 0 22%, rgba(169, 184, 203, .24) 22% 100%);
}

.page-about .about-outro__bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(169, 184, 203, .24);
}

@media (min-width: 720px) {
  .page-about .about-outro__bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

.page-about .about-outro__bar > div {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-outro__bar .num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
}

.page-about .about-outro__bar small {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-outro__cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  padding: 32px 0 0;
}

@media (min-width: 780px) {
  .page-about .about-outro__cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

.page-about .about-outro__lead {
  margin: 0;
  max-width: 34ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.3;
  color: var(--paper);
}

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

.page-about .about-outro__legal {
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(169, 184, 203, .16);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: .02em;
  color: var(--mist);
  overflow-wrap: anywhere;
}
<<<END>>>