.page-about {
  --about-pad: clamp(1.25rem, 4vw, 3rem);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--ff-sans);
  overflow-x: clip;
}

.page-about .about-hero .index-label {
  color: var(--green);
}

.page-about .index-label--light {
  color: var(--green);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(55, 167, 255, .18), transparent 58%),
    radial-gradient(90% 70% at 6% 100%, rgba(184, 255, 44, .12), transparent 62%),
    var(--ink);
  color: var(--white);
  padding-block: 2rem 3.25rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--ff-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--grey);
}

.page-about .about-hero .breadcrumbs a {
  color: var(--grey);
  text-decoration: none;
  transition: color .25s var(--ease);
}

.page-about .about-hero .breadcrumbs a:hover {
  color: var(--green);
}

.page-about .about-hero .breadcrumbs .sep {
  color: var(--line);
}

.page-about .about-hero .breadcrumbs [aria-current] {
  color: var(--white);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 2rem;
  margin-top: 1.75rem;
}

.page-about .about-hero__title {
  margin: .7rem 0 1.15rem;
  font-size: clamp(2rem, 6.6vw, 3.6rem);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-hero__intro {
  max-width: 34em;
  margin: 0;
  font-size: .9375rem;
  line-height: 1.9;
  color: rgba(248, 250, 245, .78);
}

.page-about .about-hero__badge {
  display: inline-flex;
  align-items: center;
  margin: 1.25rem 0 0;
  padding: .4rem .85rem;
  border: 1px solid rgba(184, 255, 44, .38);
  border-radius: 999px;
  font-family: var(--ff-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--green);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.75rem;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  background: var(--navy);
  border: 1px solid rgba(248, 250, 245, .14);
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
  box-shadow: 0 34px 64px -40px rgba(0, 0, 0, .9);
}

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

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  position: sticky;
  top: var(--bar-h);
  z-index: 6;
  background: rgba(243, 239, 227, .95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-index__row {
  display: flex;
  align-items: center;
  gap: .9rem;
  padding-block: .65rem;
  overflow: hidden;
}

.page-about .about-index__label {
  flex: 0 0 auto;
  margin: 0;
  color: var(--line);
}

.page-about .about-index__list {
  display: flex;
  gap: .3rem;
  margin: 0;
  padding: 0 0 .1rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-index__link {
  display: block;
  white-space: nowrap;
  padding: .35rem .7rem;
  font-family: var(--ff-mono);
  font-size: .6875rem;
  letter-spacing: .06em;
  color: var(--navy);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color .25s var(--ease), border-color .25s var(--ease), background-color .25s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link.is-active {
  color: var(--ink);
  border-color: var(--green);
  background: rgba(184, 255, 44, .22);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-section__grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-section__title {
  margin: .6rem 0 0;
  font-size: clamp(1.55rem, 3.9vw, 2.6rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-about .about-section__body p {
  margin: 0 0 1.1rem;
  line-height: 1.9;
  color: rgba(7, 10, 15, .82);
}

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

/* ---------- 三条主张 ---------- */
.page-about .about-pillars {
  margin: 2.5rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-pillars__item {
  background: var(--paper);
  padding: 1.4rem 1.2rem;
}

.page-about .about-pillars__idx {
  margin: 0 0 .55rem;
  font-family: var(--ff-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .about-pillars__item h3 {
  margin: 0 0 .5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-pillars__item p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.85;
  color: rgba(7, 10, 15, .74);
}

/* ---------- 数据体系 ---------- */
.page-about .about-data {
  position: relative;
  background: var(--ink);
  color: var(--white);
  padding-block: clamp(3.25rem, 8vw, 5.75rem);
  overflow: hidden;
}

.page-about .about-data::before {
  content: "";
  position: absolute;
  top: -24%;
  right: -12%;
  width: 44vmin;
  height: 44vmin;
  background: linear-gradient(140deg, rgba(184, 255, 44, .16), rgba(55, 167, 255, .06));
  transform: rotate(18deg);
  pointer-events: none;
}

.page-about .about-data::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--green), var(--blue) 55%, transparent);
}

.page-about .about-data__title {
  margin: .65rem 0 .9rem;
  font-size: clamp(1.6rem, 4.1vw, 2.75rem);
  font-weight: 400;
  line-height: 1.18;
  letter-spacing: -.01em;
}

.page-about .about-data__intro {
  max-width: 40em;
  margin: 0;
  font-size: .9375rem;
  line-height: 1.9;
  color: rgba(248, 250, 245, .74);
}

.page-about .about-stats {
  margin: 2.5rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: rgba(85, 96, 107, .42);
  border-block: 1px solid rgba(85, 96, 107, .42);
}

.page-about .about-stats__item {
  background: var(--ink);
  padding: 1.5rem 1.2rem;
}

.page-about .about-stats__num {
  display: block;
  font-size: clamp(2.1rem, 5.4vw, 3.2rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--blue);
}

.page-about .about-stats__unit {
  display: block;
  margin-top: .5rem;
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--white);
}

.page-about .about-stats__desc {
  margin: .7rem 0 0;
  font-size: .8125rem;
  line-height: 1.75;
  color: var(--grey);
}

.page-about .about-data__foot {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(85, 96, 107, .42);
  display: grid;
  gap: 1.1rem;
}

.page-about .about-data__foot p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.9;
  color: var(--grey);
}

/* ---------- 版本演进 ---------- */
.page-about .about-track {
  padding-block: clamp(3rem, 7vw, 5.5rem);
}

.page-about .about-track__head {
  max-width: 42em;
}

.page-about .about-track__head h2 {
  margin: .6rem 0 .9rem;
  font-size: clamp(1.55rem, 3.9vw, 2.6rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-about .about-track__head p {
  margin: 0;
  line-height: 1.9;
  color: rgba(7, 10, 15, .76);
}

.page-about .about-track__layout {
  margin-top: 2.5rem;
  display: grid;
  gap: 2.5rem;
}

.page-about .about-track__timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 2.25rem;
  list-style: none;
}

.page-about .about-track__timeline::before {
  content: "";
  position: absolute;
  left: .55rem;
  top: .6rem;
  bottom: 1.2rem;
  width: 2px;
  background: linear-gradient(180deg, var(--green), var(--blue) 55%, var(--line-soft));
}

.page-about .about-version {
  position: relative;
  padding-bottom: 1.5rem;
}

.page-about .about-version:last-child {
  padding-bottom: 0;
}

.page-about .about-version::before {
  content: "";
  position: absolute;
  left: -2.05rem;
  top: .55rem;
  width: .7rem;
  height: .7rem;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--green);
}

.page-about .about-version__card {
  border: 1px solid var(--line-soft);
  background: rgba(248, 250, 245, .7);
  padding: 1.2rem 1.1rem;
  transition: transform .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease), background-color .3s var(--ease);
}

.page-about .about-version__card:hover {
  transform: translateY(-2px);
  border-color: var(--green);
  background: #fff;
  box-shadow: 0 18px 34px -28px rgba(7, 10, 15, .65);
}

.page-about .about-version__batch {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  color: var(--blue);
}

.page-about .about-version__name {
  margin: .35rem 0 .55rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-version__text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.85;
  color: rgba(7, 10, 15, .76);
}

.page-about .about-version__use {
  margin: .8rem 0 0;
  padding-top: .8rem;
  border-top: 1px dashed var(--line-soft);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--pitch);
  transition: color .3s var(--ease);
}

.page-about .about-version__card:hover .about-version__use {
  color: var(--orange);
}

.page-about .about-track__figure {
  margin: 0;
  padding: 0;
  border: 1px solid var(--line-soft);
  background: var(--navy);
}

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

/* ---------- 团队与协作 ---------- */
.page-about .about-team {
  padding-block: clamp(3rem, 7vw, 5.5rem);
  background:
    linear-gradient(180deg, rgba(18, 53, 31, 0) 0%, rgba(18, 53, 31, .06) 100%),
    var(--paper);
}

.page-about .about-team__grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  box-shadow: 0 26px 52px -44px rgba(7, 10, 15, .95);
}

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

.page-about .about-team__body h2 {
  margin: .6rem 0 1rem;
  font-size: clamp(1.55rem, 3.8vw, 2.5rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-about .about-team__body > p {
  margin: 0 0 1.2rem;
  line-height: 1.9;
  color: rgba(7, 10, 15, .78);
}

.page-about .about-team__list {
  margin: 0 0 1.4rem;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team__list li {
  display: grid;
  gap: .2rem;
  padding: .8rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__k {
  font-family: var(--ff-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--pitch);
}

.page-about .about-team__v {
  font-size: .875rem;
  line-height: 1.75;
  color: rgba(7, 10, 15, .76);
}

.page-about .about-team__cities {
  margin: 0 !important;
  padding: 1rem 1.1rem;
  border-left: 2px solid var(--green);
  background: rgba(184, 255, 44, .12);
  font-size: .875rem !important;
  line-height: 1.9 !important;
  color: rgba(7, 10, 15, .78) !important;
}

/* ---------- 服务支持 ---------- */
.page-about .about-support {
  background: var(--navy);
  color: var(--white);
  padding-block: clamp(3.25rem, 7vw, 5.5rem);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-support h2 {
  max-width: 20em;
  margin: .6rem 0 2rem;
  font-size: clamp(1.55rem, 3.8vw, 2.5rem);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-about .about-support__grid {
  display: grid;
  gap: 1px;
  background: rgba(85, 96, 107, .45);
  border: 1px solid rgba(85, 96, 107, .45);
}

.page-about .about-support__card {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  background: var(--navy);
  padding: 1.5rem 1.2rem;
  transition: background-color .3s var(--ease);
}

.page-about .about-support__card:hover {
  background: #111821;
}

.page-about .about-support__card--warm {
  background: linear-gradient(160deg, rgba(255, 138, 42, .2), rgba(14, 20, 27, 1) 72%);
}

.page-about .about-support__card h3 {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-support__card--warm h3 {
  color: var(--orange);
}

.page-about .about-support__card p {
  flex: 1;
  margin: 0;
  font-size: .875rem;
  line-height: 1.85;
  color: var(--grey);
}

.page-about .about-support__link {
  align-self: flex-start;
  padding-bottom: .15rem;
  font-family: var(--ff-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 255, 44, .4);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-support__link:hover {
  color: var(--white);
  border-color: var(--white);
}

.page-about .about-support__contact {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(85, 96, 107, .45);
  display: grid;
  gap: .55rem;
  font-size: .875rem;
  color: rgba(248, 250, 245, .78);
}

.page-about .about-support__contact p {
  margin: 0;
  line-height: 1.8;
  word-break: break-word;
}

.page-about .about-support__k {
  display: inline-block;
  min-width: 5.5rem;
  margin-right: .5rem;
  font-family: var(--ff-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--blue);
}

.page-about .about-support__end {
  margin: 1.75rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--orange);
  font-size: .875rem;
  line-height: 1.9;
  color: rgba(248, 250, 245, .72);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .about-team__list li {
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

@media (min-width: 620px) {
  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .about-support__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-data__foot {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    padding-block: 2.5rem 4rem;
  }

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

  .page-about .about-section__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-track__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-index {
    top: 0;
  }
}

@media (min-width: 980px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

  .page-about .about-version__card:hover {
    transform: none;
  }
}
<<<END>>>