.page-about {
  --about-rail: 120px;
  --about-gap: 48px;
  color: var(--white);
  background: var(--ink);
}

.page-about .about-top {
  padding-top: calc(var(--header-h) + 24px);
}

.page-about .about-top .breadcrumb {
  margin-bottom: 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 8px 0 clamp(48px, 7vw, 88px);
}

.page-about .about-hero__head {
  max-width: 78em;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 12px;
  border: 2px solid var(--line);
  color: var(--gold);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0 0 26px;
  font-size: clamp(34px, 6.2vw, 72px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: .01em;
  max-width: 14em;
  text-wrap: balance;
}

.page-about .about-hero__lead {
  max-width: 36em;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-banner {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--hard);
  background: var(--panel);
  overflow: hidden;
}

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

.page-about .about-banner__cap {
  padding: 12px 16px;
  border-top: 2px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray);
}

/* ---------- 通用竖排注释栏 + 内容 ---------- */
.page-about .about-block__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

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

.page-about .about-rail__tag {
  display: inline-block;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  padding: 10px 0 10px 10px;
  border-left: 2px solid var(--gold);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--gray);
  transition: color .25s ease, border-color .25s ease;
}

.page-about .about-rail__tag:hover {
  color: var(--gold);
  border-left-color: var(--cyan);
}

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

.page-about .about-block__body .section-title {
  margin-top: 0;
}

.page-about .about-block__body .prose + .prose {
  margin-top: 18px;
}

/* ---------- 三项指标 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 4px;
  border-bottom: 2px solid var(--line);
}

.page-about .about-stat__num {
  font-family: var(--mono);
  font-size: clamp(34px, 5vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  min-width: 2ch;
}

.page-about .about-stat__label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--panel);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .about-timeline__head {
  max-width: 44em;
  margin-bottom: clamp(36px, 5vw, 60px);
}

.page-about .about-timeline__list {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--line) 0%, var(--gold) 42%, var(--line) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 40px 34px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  border: 2px solid var(--panel);
  transform: rotate(45deg);
}

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

.page-about .about-timeline__num {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.25;
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-timeline__figure {
  margin: clamp(36px, 5vw, 56px) 0 0;
  border: 2px solid var(--line);
  box-shadow: var(--hard-gold);
  background: var(--ink);
  overflow: hidden;
}

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

.page-about .about-timeline__cap {
  padding: 12px 16px;
  border-top: 2px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gray);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

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

.page-about .about-team__list {
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--line);
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 2px solid var(--line);
}

.page-about .about-team__k {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-team__v {
  font-size: 15px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-team__tail {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.8;
  color: var(--white);
}

.page-about .about-team__figure {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--hard);
  background: var(--panel);
  overflow: hidden;
}

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

/* ---------- 服务对象 ---------- */
.page-about .about-serve-section {
  background: var(--panel);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .about-serve-section__head {
  max-width: 44em;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-serve {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--line);
}

.page-about .about-serve__item {
  position: relative;
  padding: 26px 4px 28px;
  border-bottom: 2px solid var(--line);
}

.page-about .about-serve__idx {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--gold);
}

.page-about .about-serve__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.2vw, 23px);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-serve__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 合作 ---------- */
.page-about .about-partner__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-partner__lede .prose + .prose {
  margin-top: 18px;
}

.page-about .about-partner__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 2px solid var(--line);
  box-shadow: var(--hard-gold);
  background: var(--panel);
}

.page-about .about-partner__stats li {
  padding: 22px 20px;
  border-bottom: 2px solid var(--line);
}

.page-about .about-partner__stats li:last-child {
  border-bottom: 0;
}

.page-about .about-partner__num {
  display: block;
  font-size: clamp(38px, 5vw, 56px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-partner__unit {
  font-size: .5em;
  margin-left: 4px;
  color: var(--gray);
}

.page-about .about-partner__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__inner {
  border-top: 2px solid var(--line);
  padding-top: clamp(32px, 4vw, 48px);
  max-width: 52em;
}

.page-about .about-next__title {
  margin: 0 0 18px;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.25;
}

.page-about .about-next__lead {
  margin: 0 0 28px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

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

.page-about .about-next__actions .btn {
  min-height: 44px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-serve {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

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

  .page-about .about-partner__stats li {
    border-bottom: 0;
    border-right: 2px solid var(--line);
  }

  .page-about .about-partner__stats li:last-child {
    border-right: 0;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 2px solid var(--line);
  }

  .page-about .about-stat {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 22px 16px 22px 0;
    border-bottom: 0;
    border-right: 2px solid var(--line);
  }

  .page-about .about-stat:last-child {
    border-right: 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-block__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
  }

  .page-about .about-block__body {
    max-width: 68ch;
  }

  .page-about .about-timeline__list::before {
    left: 50%;
    margin-left: -1px;
    top: 14px;
    bottom: 14px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 0;
    padding: 0 0 56px;
  }

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

  .page-about .about-timeline__item::before {
    left: 50%;
    margin-left: -7px;
    top: 12px;
    width: 12px;
    height: 12px;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__card {
    grid-column: 1;
    text-align: right;
    padding-right: 56px;
    margin-left: auto;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card {
    grid-column: 2;
    text-align: left;
    padding-left: 56px;
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__text {
    margin-left: auto;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-partner__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }
}

@media (max-width: 400px) {
  .page-about .about-team__row {
    grid-template-columns: 3.4rem 1fr;
    gap: 12px;
  }

  .page-about .about-partner__stats li {
    padding: 18px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__tag {
    transition: none;
  }
}
<<<END>>>