.page-about {
  --about-glow:
    radial-gradient(60% 70% at 18% 0%, rgba(124, 77, 255, .36), transparent 70%),
    radial-gradient(52% 62% at 86% 6%, rgba(34, 211, 238, .22), transparent 70%);
  display: block;
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(2.5rem, 6vw, 5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -15% auto -15%;
  height: 92%;
  background: var(--about-glow);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 4rem);
  }
}

.page-about .about-hero h1 {
  margin: 1rem 0 0;
  font-size: clamp(2.05rem, 5.4vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--text);
  overflow-wrap: break-word;
}

.page-about .about-hero__intro {
  margin: 1.25rem 0 0;
  max-width: 44rem;
  color: var(--muted);
  font-size: clamp(.9875rem, 1.3vw, 1.0625rem);
  line-height: 1.85;
}

.page-about .about-hero__actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-about .about-hero__visual {
  position: relative;
  display: grid;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__panel {
  position: relative;
  margin: -2.25rem 0 0 auto;
  width: min(100%, 20rem);
  padding: 1.125rem 1.25rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(17, 26, 51, .97), rgba(5, 8, 22, .97));
  box-shadow: var(--shadow);
}

.page-about .about-hero__panel-label {
  margin: 0 0 .875rem;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  color: var(--cyan);
}

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

.page-about .about-hero__stats .stat__value {
  color: var(--gold);
}

.page-about .about-hero__annotation {
  display: none;
}

@media (min-width: 1440px) {
  .page-about .about-hero__annotation {
    display: block;
    position: absolute;
    left: -3rem;
    bottom: 3rem;
    margin: 0;
    writing-mode: vertical-rl;
    letter-spacing: .22em;
  }
}

/* ---------- 章节目录 ---------- */
.page-about .about-toc {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(11, 18, 38, .72), rgba(5, 8, 22, .25));
}

.page-about .about-toc__inner {
  display: grid;
  gap: .875rem;
}

@media (min-width: 900px) {
  .page-about .about-toc__inner {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 2rem;
  }
}

/* ---------- 通用章节骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(3rem, 7vw, 6rem) 0;
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--line-2);
}

.page-about .about-chapter__head {
  display: grid;
  gap: .625rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

@media (min-width: 860px) {
  .page-about .about-chapter__head {
    grid-template-columns: auto minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
  }
}

.page-about .about-index {
  font-family: var(--font-mono);
  font-size: clamp(2.75rem, 8vw, 5.5rem);
  line-height: .82;
  font-weight: 700;
  letter-spacing: -.02em;
  color: rgba(124, 77, 255, .34);
  user-select: none;
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-about .about-index {
    color: transparent;
    -webkit-text-stroke: 1px rgba(124, 77, 255, .6);
  }
}

.page-about .about-chapter__title {
  margin: .5rem 0 0;
  font-size: clamp(1.6rem, 3.4vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--text);
  max-width: 30ch;
}

.page-about .about-chapter__lead {
  max-width: 62ch;
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  color: var(--muted);
  line-height: 1.85;
}

.page-about .about-chapter__body {
  align-items: start;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-prose p {
  margin: 0 0 1.125rem;
  max-width: 60ch;
  line-height: 1.9;
  color: rgba(248, 250, 252, .82);
}

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

.page-about .about-subtitle {
  margin: 0 0 .75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, .42);
  padding-bottom: 1px;
  transition: border-color .2s ease;
}

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

/* ---------- 品牌缘起 ---------- */
.page-about .about-facts {
  margin: 0;
  display: grid;
  align-content: start;
  border-top: 1px solid var(--line);
}

.page-about .about-facts__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: .875rem 0;
  border-bottom: 1px solid var(--line-2);
}

.page-about .about-facts__item dt {
  color: var(--muted);
  font-size: .9375rem;
}

.page-about .about-facts__item dd {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 团队与栏目 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 0 0 clamp(2.5rem, 5vw, 4rem);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

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

@media (min-width: 1120px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

.page-about .about-team__card {
  position: relative;
  padding: 1.5rem 1.25rem 1.375rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(17, 26, 51, .78), rgba(5, 8, 22, .55));
  transition: transform .28s ease, border-color .28s ease, box-shadow .28s ease;
}

.page-about .about-team__card::after {
  content: "";
  position: absolute;
  left: 1.25rem;
  right: 1.25rem;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  opacity: 0;
  transition: opacity .28s ease;
}

@media (hover: hover) and (pointer: fine) {
  .page-about .about-team__card:hover,
  .page-about .about-team__card:focus-within {
    transform: translateY(-4px);
    border-color: var(--line-strong);
    box-shadow: 0 22px 48px -30px rgba(34, 211, 238, .85);
  }

  .page-about .about-team__card:hover::after,
  .page-about .about-team__card:focus-within::after {
    opacity: 1;
  }

  .page-about .about-team__card:hover .about-team__duty {
    color: rgba(248, 250, 252, .82);
  }
}

.page-about .about-team__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(34, 211, 238, .08);
  color: var(--cyan);
}

.page-about .about-team__role {
  margin: 1rem 0 .375rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-team__size {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-team__duty {
  margin: .75rem 0 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--muted);
  transition: color .28s ease;
}

.page-about .about-columns {
  align-items: start;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-columns__desc {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
  max-width: 48ch;
}

.page-about .about-col-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}

.page-about .about-col-list__item {
  padding: .5rem .875rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(124, 77, 255, .12);
  color: var(--text);
  font-size: .875rem;
}

.page-about .about-columns__more {
  margin: 1.25rem 0 0;
  font-size: .9375rem;
}

.page-about .about-columns__figure,
.page-about .about-milestones__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-columns__figure img,
.page-about .about-milestones__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 发展历程 ---------- */
.page-about .about-milestones {
  align-items: start;
  gap: clamp(2rem, 4vw, 3rem);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 1.5rem;
  list-style: none;
  border-left: 1px solid var(--line);
  display: grid;
  gap: 2rem;
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline .timeline__dot {
  position: absolute;
  left: -1.5rem;
  top: .45rem;
  width: .625rem;
  height: .625rem;
  transform: translateX(-50%);
  border-radius: 50%;
  background: var(--violet);
  box-shadow: 0 0 0 4px rgba(124, 77, 255, .18);
}

.page-about .about-timeline .timeline__time {
  margin: 0 0 .375rem;
  font-size: .9375rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 0 0 .375rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-timeline .timeline__text {
  margin: 0;
  max-width: 48ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--muted);
}

@media (min-width: 860px) {
  .page-about .about-milestones__figure {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }
}

/* ---------- 数据与内容体系 ---------- */
.page-about .about-rhythm {
  list-style: none;
  margin: 0 0 clamp(2rem, 4vw, 3rem);
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

@media (min-width: 860px) {
  .page-about .about-rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-rhythm__item {
  display: grid;
  gap: .5rem;
  padding: 1.25rem 1.25rem 1.5rem;
  background: linear-gradient(180deg, rgba(11, 18, 38, .95), rgba(5, 8, 22, .95));
}

.page-about .about-rhythm__time {
  font-size: .9375rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-about .about-rhythm__text {
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-system {
  display: grid;
  gap: .75rem;
}

.page-about .about-system .panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 18, 38, .6);
  overflow: hidden;
}

.page-about .about-system .panel__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.125rem 1.25rem;
  border: 0;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.page-about .about-system .panel__body {
  padding: 0 1.25rem 1.25rem;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

.page-about .about-system .panel__body p {
  margin: 0;
  max-width: 66ch;
}

/* ---------- 服务地区与承诺 ---------- */
.page-about .about-service {
  gap: clamp(1.25rem, 3vw, 2rem);
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
}

.page-about .about-service__block {
  padding: 1.5rem 1.5rem 1.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(170deg, rgba(17, 26, 51, .72), rgba(5, 8, 22, .5));
}

.page-about .about-service__block h3 {
  margin: 0 0 .875rem;
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-service__block p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

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

.page-about .about-service__list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: .625rem;
}

.page-about .about-service__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: .9375rem;
  line-height: 1.75;
  color: rgba(248, 250, 252, .82);
}

.page-about .about-service__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .625rem;
  width: .375rem;
  height: .375rem;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-cta {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(80% 120% at 0% 0%, rgba(124, 77, 255, .3), transparent 65%),
    radial-gradient(70% 120% at 100% 100%, rgba(34, 211, 238, .18), transparent 65%),
    rgba(11, 18, 38, .72);
}

@media (min-width: 860px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2rem;
  }
}

.page-about .about-cta__title {
  margin: 0 0 .5rem;
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  font-weight: 700;
  color: var(--text);
}

.page-about .about-cta__sub {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.75;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

@media (max-width: 480px) {
  .page-about .about-hero__panel {
    width: 100%;
    margin-top: -1.5rem;
  }

  .page-about .about-hero__stats {
    gap: .75rem;
  }
}
<<<END>>>