.page-about {
  --about-dim: #D3CEC2;
  --about-line-soft: rgba(58, 63, 99, .7);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding-top: 24px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--mute);
}
.page-about .breadcrumb a {
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .breadcrumb a:hover {
  color: var(--violet);
  border-bottom-color: var(--violet);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 44px;
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(180, 92, 255, .26), transparent 62%),
    radial-gradient(90% 80% at 0% 18%, rgba(232, 176, 75, .14), transparent 58%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 78%);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--violet), var(--gold) 48%, transparent 92%);
  opacity: .8;
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-about .about-hero__title {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 7.2vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
  max-width: 18em;
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 46em;
  font-size: clamp(.95rem, 2.4vw, 1.06rem);
  line-height: 1.85;
  color: var(--about-dim);
}
.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-hero__tags li {
  padding: 7px 12px;
  border: 2px solid var(--line);
  background: rgba(23, 27, 58, .72);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--paper);
}
.page-about .about-hero__tags li:nth-child(2) {
  border-color: var(--violet);
  color: var(--violet);
}
.page-about .about-hero__tags li:nth-child(4) {
  border-color: var(--orange);
  color: var(--orange);
}

/* 主体骨架 */
.page-about .about-shell {
  display: grid;
  gap: 28px;
  padding: 32px 0 64px;
}

.page-about .about-toc {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 0 0 10px;
  border-bottom: 2px solid var(--line);
  -webkit-overflow-scrolling: touch;
}
.page-about .about-toc .toc__title {
  display: none;
}
.page-about .about-toc .toc__link {
  flex: 0 0 auto;
  padding: 8px 12px;
  border: 2px solid var(--line);
  background: var(--ink-2);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--mute);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}
.page-about .about-toc .toc__link:hover,
.page-about .about-toc .toc__link.is-active {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

/* 章节 */
.page-about .about-sec {
  padding: 8px 0 56px;
}
.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 22px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line);
}
.page-about .about-sec__num {
  flex: 0 0 auto;
  font-size: clamp(1.3rem, 4.4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--violet);
  letter-spacing: .02em;
}
.page-about .about-sec__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.28rem, 3.8vw, 2rem);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--paper);
}

/* 正文 */
.page-about .about-txt p {
  margin: 0 0 16px;
  font-size: clamp(.94rem, 2.2vw, 1rem);
  line-height: 1.85;
  color: var(--about-dim);
}
.page-about .about-txt p:last-child {
  margin-bottom: 0;
}
.page-about .about-txt a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 176, 75, .5);
}
.page-about .about-txt a:hover {
  color: var(--violet);
  border-bottom-color: var(--violet);
}
.page-about .about-txt--wide {
  margin: 0 0 24px;
  max-width: 60em;
}
.page-about .about-note {
  font-size: .9rem !important;
  color: var(--mute) !important;
}
.page-about .about-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--about-line-soft);
}
.page-about .about-list li {
  position: relative;
  padding: 12px 0 12px 20px;
  border-bottom: 2px solid var(--about-line-soft);
  font-size: .94rem;
  line-height: 1.7;
  color: var(--about-dim);
}
.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 8px;
  background: var(--violet);
  box-shadow: 0 0 0 3px rgba(180, 92, 255, .16);
}
.page-about .about-list strong {
  color: var(--paper);
  font-weight: 700;
}

/* 分栏 */
.page-about .about-split {
  display: grid;
  gap: 24px;
}
.page-about .about-fig {
  margin: 0;
}
.page-about .img-frame {
  border: 2px solid var(--line);
  background: var(--panel);
  padding: 8px;
  box-shadow: var(--shadow-hard);
}
.page-about .img-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-about .img-frame__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--mute);
}

/* 时间线 */
.page-about .about-banner {
  margin: 0 0 32px;
  box-shadow: var(--shadow-violet);
}
.page-about .about-banner img {
  max-height: 300px;
}
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 18px;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--violet), var(--gold) 62%, var(--orange));
}
.page-about .tl-item {
  position: relative;
  padding: 0 0 26px 18px;
}
.page-about .tl-item:last-child {
  padding-bottom: 0;
}
.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 176, 75, .16), 0 0 16px rgba(232, 176, 75, .5);
}
.page-about .tl-year {
  display: block;
  margin-bottom: 10px;
  font-size: clamp(1.4rem, 5vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--gold);
  text-shadow: 0 0 20px rgba(232, 176, 75, .38);
}
.page-about .ab-panel {
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  padding: 18px;
}
.page-about .ab-panel--paper {
  background: var(--paper);
  border-color: var(--ink);
  box-shadow: 8px 8px 0 0 rgba(180, 92, 255, .5);
  color: var(--ink);
}
.page-about .tl-body h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1rem, 2.8vw, 1.18rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-about .tl-body p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--about-dim);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: 16px;
}
.page-about .team-card h3 {
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--paper);
}
.page-about .team-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--about-dim);
}
.page-about .team-card .tag {
  display: inline-block;
  padding: 4px 10px;
  border: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--paper);
}
.page-about .team-card .tag--violet {
  border-color: var(--violet);
  color: var(--violet);
}
.page-about .team-card .tag--mint {
  border-color: var(--mint);
  color: var(--mint);
}
.page-about .about-folds {
  margin-top: 24px;
}
.page-about .about-fold {
  margin-bottom: 10px;
  border: 2px solid var(--line);
  background: var(--ink-2);
}
.page-about .about-fold .fold__head {
  padding: 13px 16px;
  font-family: var(--font-body);
  font-size: .93rem;
  font-weight: 700;
  color: var(--paper);
  cursor: pointer;
}
.page-about .about-fold .fold__head:hover {
  color: var(--violet);
}
.page-about .about-fold[open] .fold__head {
  color: var(--violet);
  border-bottom: 2px solid var(--line);
}
.page-about .about-fold .fold__body {
  padding: 14px 16px 16px;
}
.page-about .about-fold .fold__body p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--about-dim);
}

/* 硬件测试 */
.page-about .about-split--5-7 .about-fig {
  box-shadow: var(--shadow-gold);
}

/* 覆盖数据 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.page-about .ab-stat {
  display: block;
  padding: 16px 14px;
  border: 2px solid var(--line);
  background: linear-gradient(160deg, var(--ink-2), var(--panel));
  border-left: 4px solid var(--gold);
}
.page-about .ab-stat .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 4.6vw, 1.95rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--gold);
}
.page-about .ab-stat .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mute);
}
.page-about .about-back {
  padding: 20px;
}
.page-about .about-back h3 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--ink);
}
.page-about .about-back p {
  margin: 0 0 12px;
  font-size: .92rem;
  line-height: 1.8;
  color: #2A2E45;
}
.page-about .about-back p:last-child {
  margin-bottom: 0;
}
.page-about .about-back a {
  color: #6A2FBF;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(106, 47, 191, .45);
}

/* 四条业务线 */
.page-about .about-lines {
  display: grid;
  gap: 14px;
}
.page-about .line-card {
  display: block;
  padding: 18px;
  border: 2px solid var(--line);
  background: var(--ink-2);
  text-decoration: none;
  transition: transform .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.page-about .line-card__k {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--violet);
}
.page-about .line-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.02rem;
  color: var(--paper);
}
.page-about .line-card p {
  margin: 0;
  font-size: .89rem;
  line-height: 1.72;
  color: var(--mute);
}
.page-about .line-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--violet);
  box-shadow: var(--shadow-violet);
}
.page-about .line-card:hover p {
  color: var(--about-dim);
}
.page-about .about-gift {
  margin: 20px 0 0;
  padding: 12px 16px;
  border-left: 4px solid var(--mint);
  background: rgba(61, 214, 181, .08);
  font-size: .9rem;
  line-height: 1.7;
  color: var(--paper);
}

/* 结尾行动区 */
.page-about .about-cta {
  border-top: 2px solid var(--line);
  background:
    radial-gradient(100% 140% at 12% 0%, rgba(255, 106, 61, .24), transparent 60%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
  padding: 40px 0 52px;
}
.page-about .about-cta__inner h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.4rem, 4.4vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-about .about-cta__inner p {
  margin: 0 0 22px;
  max-width: 40em;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--about-dim);
}
.page-about .about-cta__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta__btns .btn {
  display: inline-block;
  padding: 12px 20px;
  border: 2px solid var(--line);
  font-family: var(--font-body);
  font-size: .92rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--paper);
  background: transparent;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}
.page-about .about-cta__btns .btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
  box-shadow: 6px 6px 0 0 rgba(7, 10, 20, .85);
}
.page-about .about-cta__btns .btn--paper {
  background: var(--paper);
  border-color: var(--paper);
  color: var(--ink);
  box-shadow: 6px 6px 0 0 rgba(180, 92, 255, .55);
}
.page-about .about-cta__btns .btn:hover {
  transform: translate(-2px, -2px);
}

/* 桌面端 */
@media (min-width: 760px) {
  .page-about .about-sec {
    padding-bottom: 64px;
  }
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    align-items: start;
  }
  .page-about .team-card:nth-child(2) {
    margin-top: 30px;
  }
  .page-about .team-card:nth-child(3) {
    margin-top: 14px;
  }
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
  .page-about .about-lines {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-split--7-5 {
    grid-template-columns: 7fr 5fr;
    gap: 28px;
    align-items: start;
  }
  .page-about .about-split--5-7 {
    grid-template-columns: 5fr 7fr;
    gap: 28px;
    align-items: start;
  }
  .page-about .tl-item {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
  }
  .page-about .tl-year {
    margin-bottom: 0;
    text-align: right;
    padding-top: 12px;
  }
}

/* 宽屏 */
@media (min-width: 1000px) {
  .page-about .about-hero {
    padding: 40px 0 60px;
  }
  .page-about .about-hero__title {
    transform: skewX(-2deg);
    transform-origin: left bottom;
  }
  .page-about .about-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 52px;
    padding: 44px 0 80px;
  }
  .page-about .about-toc {
    position: sticky;
    top: 96px;
    display: block;
    overflow: visible;
    padding: 0 0 0 16px;
    border-bottom: 0;
    border-left: 2px solid var(--line);
  }
  .page-about .about-toc .toc__title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--mute);
  }
  .page-about .about-toc .toc__link {
    display: block;
    margin-bottom: 6px;
    padding: 8px 10px;
    border-color: transparent;
    background: transparent;
    white-space: normal;
  }
  .page-about .about-toc .toc__link:hover,
  .page-about .about-toc .toc__link.is-active {
    color: var(--paper);
    background: rgba(180, 92, 255, .16);
    border-color: var(--violet);
    box-shadow: -6px 0 0 0 var(--violet);
  }
  .page-about .about-banner img {
    max-height: 360px;
  }
  .page-about .ab-panel {
    padding: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .line-card,
  .page-about .about-toc .toc__link,
  .page-about .about-cta__btns .btn {
    transition: none;
  }
  .page-about .about-hero__title {
    transform: none;
  }
}
<<<END>>>