.page-about {
  --about-rail-w: 224px;
  --about-gap: clamp(24px, 3.4vw, 52px);
  --about-text: rgba(244, 248, 255, .82);
  background: var(--navy);
  color: var(--white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1.2;
}

.page-about p {
  line-height: 1.75;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--navy-deep);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
}

.page-about .about-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
}

.page-about .about-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 90% at 6% 0%, rgba(0, 229, 255, .2), transparent 58%),
    radial-gradient(80% 70% at 100% 100%, rgba(255, 106, 42, .14), transparent 62%),
    linear-gradient(180deg, rgba(7, 18, 38, .74), rgba(7, 18, 38, .95));
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(32px, 5vw, 68px);
  padding-bottom: clamp(52px, 7vw, 92px);
}

.page-about .breadcrumb {
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-about .about-hero__frame {
  position: relative;
  max-width: 880px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(180deg, rgba(16, 42, 76, .86), rgba(7, 18, 38, .8));
  padding: clamp(20px, 3vw, 40px);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 56px;
  height: 56px;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  opacity: .65;
  pointer-events: none;
}

.page-about .about-hero h1 {
  font-size: clamp(27px, 5.2vw, 52px);
  font-weight: 900;
  margin: .4em 0 .55em;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15.5px, 1.6vw, 18px);
  color: var(--ice);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(26px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  max-width: 880px;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(11, 27, 51, .92);
}

.page-about .about-hero__num {
  font-size: clamp(19px, 2.3vw, 27px);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-hero__num em {
  font-style: normal;
  color: var(--orange);
}

.page-about .about-hero__label {
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-hero__ticks {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 12px;
  z-index: 3;
  pointer-events: none;
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 26px);
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 主体：轨道 + 章节流 ---------- */
.page-about .about-body {
  display: block;
  padding-top: clamp(30px, 4vw, 56px);
  padding-bottom: clamp(48px, 6vw, 88px);
}

@media (min-width: 980px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }
}

.page-about .about-rail {
  margin-bottom: 28px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(16, 42, 76, .5);
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--mist);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__list li {
  flex: 0 0 auto;
}

.page-about .about-rail__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--white);
  font-size: 13.5px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .25s var(--ease), color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-rail__list a .mono {
  font-size: 12px;
  color: var(--mist);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 229, 255, .07);
  outline: none;
}

.page-about .about-rail__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-rail__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

@media (min-width: 980px) {
  .page-about .about-rail {
    position: sticky;
    top: 92px;
    margin-bottom: 0;
    padding: 20px 18px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-rail__list a {
    width: 100%;
    padding: 10px 10px 10px 12px;
    border-color: transparent;
    border-left: 2px solid transparent;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-color: transparent;
    border-left-color: var(--cyan);
    background: rgba(0, 229, 255, .06);
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: clamp(34px, 4.6vw, 60px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-flow > .about-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-section__head {
  margin-bottom: clamp(20px, 2.6vw, 32px);
}

.page-about .about-section__head .eyebrow {
  margin: 0;
}

.page-about .about-section__head h2 {
  margin: .3em 0 0;
  font-size: clamp(22px, 3.1vw, 36px);
  max-width: 22ch;
}

.page-about .about-section__lede {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  color: var(--mist);
}

/* ---------- 01 定位 ---------- */
.page-about .about-position {
  display: grid;
  gap: 14px;
}

.page-about .about-position p {
  margin: 0;
  font-size: 15.5px;
  color: var(--about-text);
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(20px, 2.8vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--navy);
  font-size: 14.5px;
  color: var(--about-text);
}

.page-about .about-facts .mono {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}

@media (min-width: 760px) {
  .page-about .about-position {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 40px);
  }

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

/* ---------- 02 服务网格 ---------- */
.page-about .about-services {
  display: grid;
  gap: 14px;
}

.page-about .about-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2vw, 24px);
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
  transition: border-color .25s var(--ease);
}

.page-about .about-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 0;
  background: var(--cyan);
  transition: height .3s var(--ease);
}

.page-about .about-card:hover {
  border-color: var(--line-cyan);
}

.page-about .about-card:hover::after {
  height: 100%;
}

.page-about .about-card__code {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-card h3 {
  margin: 0;
  font-size: clamp(17px, 1.8vw, 20px);
}

.page-about .about-card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--about-text);
}

.page-about .about-card .about-card__meta {
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-card__link {
  margin-top: auto;
  width: 100%;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--cyan);
  font-size: 14px;
  text-decoration: none;
  transition: color .25s var(--ease);
}

.page-about .about-card__link:hover,
.page-about .about-card__link:focus-visible {
  color: var(--orange);
  outline: none;
}

.page-about .about-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

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

.page-about .about-figure figcaption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--orange);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

@media (min-width: 740px) {
  .page-about .about-services {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-card {
    grid-column: span 2;
  }

  .page-about .about-card--wide {
    grid-column: span 4;
  }
}

/* ---------- 03 主题归类 ---------- */
.page-about .about-taxonomy {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-taxonomy__intro p {
  margin: 0 0 14px;
  font-size: 15.5px;
  color: var(--about-text);
}

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

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

.page-about .about-index-list li {
  display: flex;
  gap: 16px;
  padding: 16px 6px;
  border-bottom: 1px solid var(--line);
  transition: background .25s var(--ease);
}

.page-about .about-index-list li:hover {
  background: rgba(0, 229, 255, .05);
}

.page-about .about-index-list .mono {
  flex: 0 0 30px;
  padding-top: 3px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-index-list h3 {
  margin: 0 0 4px;
  font-size: 16.5px;
}

.page-about .about-index-list p {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-taxonomy {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-index-list {
    border-top: 2px solid var(--cyan);
  }
}

/* ---------- 04 更新节奏时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(20px, 2.6vw, 28px);
  margin-bottom: clamp(16px, 2.2vw, 24px);
  border-bottom: 1px dashed rgba(244, 248, 255, .1);
  outline: none;
}

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

.page-about .about-timeline__node {
  position: absolute;
  top: 7px;
  left: -31px;
  width: 9px;
  height: 9px;
  background: var(--navy);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__node,
.page-about .about-timeline__item:focus-within .about-timeline__node {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, .16);
}

.page-about .about-timeline__time {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .about-timeline__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.page-about .about-timeline__item p {
  margin: 0;
  font-size: 14.5px;
  color: var(--about-text);
}

.page-about .about-timeline__more {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
}

@media (hover: hover) {
  .page-about .about-timeline__more {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .35s var(--ease), opacity .35s var(--ease), margin-top .35s var(--ease);
  }

  .page-about .about-timeline__item:hover .about-timeline__more,
  .page-about .about-timeline__item:focus-within .about-timeline__more {
    max-height: 9rem;
    margin-top: 8px;
    opacity: 1;
  }
}

/* ---------- 05 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-team__text p {
  margin: 0 0 18px;
  font-size: 15.5px;
  color: var(--about-text);
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__list li {
  padding: 14px 16px;
  background: rgba(16, 42, 76, .55);
  border-left: 2px solid var(--graphite);
  transition: border-color .25s var(--ease);
}

.page-about .about-team__list li:hover {
  border-left-color: var(--orange);
}

.page-about .about-team__list h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
}

.page-about .about-team__list p {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
}

.page-about .about-team__media {
  margin: 0;
}

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

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

/* ---------- 06 选择理由 ---------- */
.page-about .about-reasons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-reasons li {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  background: var(--navy-deep);
}

.page-about .about-reasons__num {
  flex: 0 0 28px;
  padding-top: 2px;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-about .about-reasons h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.page-about .about-reasons p {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
}

@media (min-width: 820px) {
  .page-about .about-reasons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(24px, 3.4vw, 42px);
  border: 1px solid var(--line-strong);
  border-top: 3px solid var(--cyan);
  background: linear-gradient(135deg, rgba(16, 42, 76, .92), rgba(7, 18, 38, .94));
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(255, 106, 42, .22), transparent 70%);
  pointer-events: none;
}

.page-about .about-cta .eyebrow {
  margin: 0;
}

.page-about .about-cta h2 {
  margin: .3em 0 .5em;
  font-size: clamp(20px, 2.6vw, 30px);
  max-width: 24ch;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  color: var(--about-text);
}

.page-about .about-cta__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}
<<<END>>>