.page-about {
  --about-side: 15rem;
  --about-hair: rgba(221, 231, 242, 0.14);
  color: var(--gray);
  background: var(--ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 1.1rem;
  padding-bottom: 0.35rem;
}

.page-about .crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-cond);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-about .crumb__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.page-about .crumb__link {
  color: var(--dim);
  text-decoration: none;
}

.page-about .crumb__link:hover,
.page-about .crumb__link:focus-visible {
  color: var(--cyan);
}

.page-about .crumb__sep {
  color: var(--dim-deep);
}

.page-about .crumb__current {
  color: var(--silver);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--about-hair);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(53, 242, 208, 0.16), transparent 62%),
    linear-gradient(164deg, var(--indigo) 0%, var(--ink) 66%);
  padding: clamp(2.25rem, 8vw, 4.75rem) 0 clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, var(--about-hair) 1px, transparent 1px);
  background-size: clamp(3rem, 9vw, 6.5rem) 100%;
  opacity: 0.45;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 72%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), transparent 72%);
}

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

.page-about .about-hero__eyebrow {
  margin: 0;
  font-family: var(--font-cond);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0.85rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.95rem, 7.4vw, 4.25rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-about .about-hero__lede {
  max-width: 40rem;
  margin: 1.1rem 0 0;
  color: var(--gray);
  font-size: clamp(0.95rem, 2.4vw, 1.06rem);
  line-height: 1.85;
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.9rem 0 0;
  padding: 0;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-hero__meta-item {
  background: rgba(13, 27, 42, 0.86);
  padding: 0.85rem 0.95rem;
}

.page-about .about-hero__meta-k {
  margin: 0;
  font-family: var(--font-cond);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-about .about-hero__meta-v {
  margin: 0.28rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 4.5vw, 1.75rem);
  line-height: 1.1;
  color: var(--silver);
}

.page-about .about-hero__meta-v span {
  font-family: var(--font-body);
  font-size: 0.74rem;
  color: var(--dim);
  margin-left: 0.25rem;
}

/* ---------- 主体分栏 ---------- */

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
  padding-top: 1.4rem;
  padding-bottom: 3.5rem;
}

.page-about .about-index {
  min-width: 0;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-index__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-cond);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim-deep);
}

.page-about .about-index__list {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.45rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__item {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: rgba(13, 27, 42, 0.72);
  color: var(--gray);
  font-size: 0.82rem;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--cyan);
  color: var(--silver);
  background: rgba(53, 242, 208, 0.08);
}

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

/* ---------- 章节 ---------- */

.page-about .about-flow {
  min-width: 0;
}

.page-about .sec {
  position: relative;
  padding: clamp(1.9rem, 6vw, 3.1rem) 0 clamp(1.6rem, 4vw, 2.6rem);
  border-top: 1px solid var(--about-hair);
  --sec-accent: var(--cyan);
}

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

.page-about .sec::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 3.5rem;
  height: 2px;
  background: var(--sec-accent);
}

.page-about .sec--teal {
  --sec-accent: var(--cyan);
  background: radial-gradient(95% 65% at 100% 0%, rgba(11, 43, 46, 0.9), transparent 72%);
}

.page-about .sec--indigo {
  --sec-accent: var(--violet);
  background: radial-gradient(95% 65% at 0% 0%, rgba(33, 22, 63, 0.92), transparent 72%);
}

.page-about .sec--panel {
  --sec-accent: var(--orange);
  background: radial-gradient(95% 65% at 100% 0%, rgba(13, 27, 42, 0.95), transparent 74%);
}

.page-about .sec--wine {
  --sec-accent: var(--rose);
  background: radial-gradient(95% 65% at 0% 0%, rgba(58, 18, 32, 0.82), transparent 70%);
}

.page-about .sec__head {
  margin-bottom: 0.9rem;
}

.page-about .sec__num {
  margin: 0;
  font-family: var(--font-cond);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sec-accent);
}

.page-about .sec__title {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 5vw, 2.15rem);
  line-height: 1.25;
  color: var(--silver);
  letter-spacing: -0.005em;
}

.page-about .sec__lede {
  max-width: 44rem;
  margin: 0 0 1.25rem;
  color: var(--gray);
}

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

.page-about .sec__main {
  min-width: 0;
}

.page-about .sec__main p {
  margin: 0 0 0.85rem;
}

.page-about .sec__note {
  border-left: 2px solid var(--sec-accent);
  padding: 0.15rem 0 0.15rem 0.9rem;
}

.page-about .sec__note-label {
  margin: 0 0 0.45rem;
  font-family: var(--font-cond);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-about .sec__note-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--dim);
}

.page-about .sec__note-list li {
  position: relative;
  padding-left: 0.85rem;
  margin-bottom: 0.4rem;
}

.page-about .sec__note-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 0.32rem;
  height: 1px;
  background: var(--sec-accent);
}

.page-about .sec__foot {
  margin: 1.1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--about-hair);
  font-size: 0.86rem;
  color: var(--dim);
}

/* ---------- 图片 ---------- */

.page-about .about-fig {
  margin: 1.4rem 0 0;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  box-shadow: 0 12px 30px -22px rgba(0, 0, 0, 0.9);
}

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

.page-about .figure__caption {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--about-hair);
  font-family: var(--font-cond);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--dim);
}

.page-about .about-fig--side {
  margin-top: 1.2rem;
}

/* ---------- 服务四件事 ---------- */

.page-about .svc {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .svc__item {
  background: rgba(13, 27, 42, 0.92);
  padding: 1.05rem 1rem 1.15rem;
  transition: background 180ms ease, box-shadow 180ms ease;
}

.page-about .svc__item:hover,
.page-about .svc__item:focus-within {
  background: rgba(33, 22, 63, 0.9);
  box-shadow: inset 0 0 0 1px var(--violet);
}

.page-about .svc__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--violet);
}

.page-about .svc__t {
  margin: 0.35rem 0 0.4rem;
  font-family: var(--font-cond);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-about .svc__d {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 团队 ---------- */

.page-about .team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team__item {
  padding: 0.9rem 0.95rem;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: rgba(13, 27, 42, 0.8);
  transition: transform 180ms ease, border-color 180ms ease;
}

.page-about .team__item:hover,
.page-about .team__item:focus-within {
  transform: translateY(-2px);
  border-color: var(--orange);
}

.page-about .team__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  line-height: 1.1;
  color: var(--silver);
}

.page-about .team__count span {
  font-family: var(--font-body);
  font-size: 0.72rem;
  color: var(--dim);
  margin-left: 0.2rem;
}

.page-about .team__role {
  margin: 0.2rem 0 0.35rem;
  font-family: var(--font-cond);
  font-size: 0.94rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .team__desc {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 质量流程 ---------- */

.page-about .qc {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: qc;
}

.page-about .qc__item {
  position: relative;
  padding: 0 0 0.95rem 2.1rem;
  border-bottom: 1px solid var(--about-hair);
  margin-bottom: 0.95rem;
  counter-increment: qc;
}

.page-about .qc__item:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .qc__item::before {
  content: "0" counter(qc);
  position: absolute;
  left: 0;
  top: 0.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--rose);
}

.page-about .qc__t {
  margin: 0 0 0.3rem;
  font-family: var(--font-cond);
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--silver);
}

.page-about .qc__d {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 时间轴 ---------- */

.page-about .tl {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(9.5rem, 1fr);
  gap: 0;
  margin: 0;
  padding: 1.5rem 0 0.4rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .tl__item {
  position: relative;
  padding: 1.15rem 1rem 0 0;
  border-top: 1px solid var(--line-strong);
  transition: border-color 180ms ease;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53, 242, 208, 0.16);
}

.page-about .tl__item:last-child::before {
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 47, 0.2);
}

.page-about .tl__item:hover,
.page-about .tl__item:focus-within {
  border-top-color: var(--cyan);
}

.page-about .tl__stage {
  margin: 0 0 0.35rem;
  font-family: var(--font-cond);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--silver);
}

.page-about .tl__desc {
  margin: 0;
  font-size: 0.79rem;
  line-height: 1.65;
  color: var(--dim);
  opacity: 0.85;
  transition: opacity 180ms ease, color 180ms ease;
}

.page-about .tl__item:hover .tl__desc,
.page-about .tl__item:focus-within .tl__desc {
  opacity: 1;
  color: var(--gray);
}

/* ---------- 生态数据 ---------- */

.page-about .eco {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .eco__stat {
  background: rgba(13, 27, 42, 0.9);
  padding: 1rem 0.9rem 1.1rem;
}

.page-about .eco__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 6vw, 2.1rem);
  line-height: 1.05;
  color: var(--silver);
}

.page-about .eco__num span {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--cyan);
  margin-left: 0.2rem;
}

.page-about .eco__label {
  margin: 0.4rem 0 0;
  font-size: 0.79rem;
  line-height: 1.6;
  color: var(--dim);
}

/* ---------- 行动入口 ---------- */

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

.page-about .about-cta .btn {
  flex: 1 1 auto;
  justify-content: center;
  text-align: center;
  min-height: 2.6rem;
}

.page-about .about-cta .btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 平板 ---------- */

@media (min-width: 640px) {
  .page-about .svc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .eco {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cta .btn {
    flex: 0 0 auto;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-side) minmax(0, 1fr);
    gap: clamp(1.75rem, 4vw, 3.25rem);
    padding-top: 2.2rem;
    padding-bottom: 5rem;
  }

  .page-about .about-index {
    position: sticky;
    top: 1.25rem;
    align-self: start;
    border-bottom: 0;
    border-right: 1px solid var(--about-hair);
    padding: 0 1.1rem 0.5rem 0;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 0.2rem;
  }

  .page-about .about-index__item {
    flex: 1 1 auto;
  }

  .page-about .about-index__link {
    display: flex;
    width: 100%;
    padding: 0.45rem 0.35rem;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    font-size: 0.86rem;
    white-space: normal;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(53, 242, 208, 0.06);
  }

  .page-about .sec__grid {
    grid-template-columns: minmax(0, 1fr) 14rem;
    gap: 2rem;
    align-items: start;
  }

  .page-about .sec__grid--flip {
    grid-template-columns: minmax(0, 1fr) 18rem;
  }

  .page-about .about-fig--side {
    margin-top: 0.4rem;
  }

  .page-about .sec__lede {
    font-size: 1rem;
  }
}

@media (min-width: 1200px) {
  .page-about {
    --about-side: 16.5rem;
  }

  .page-about .sec__grid {
    grid-template-columns: minmax(0, 1fr) 15.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .svc__item,
  .page-about .team__item,
  .page-about .tl__desc,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .team__item:hover,
  .page-about .team__item:focus-within {
    transform: none;
  }
}
<<<END>>>