.page-about {
  --about-rail-w: 322px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: 36px 4px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  margin-top: 30px;
}

.page-about .about-hero__text h1 {
  margin: 16px 0 0;
  font-size: clamp(2.05rem, 8.2vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-about .about-hero__accent {
  background: linear-gradient(96deg, var(--neon) 0%, var(--blue) 50%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__text .lead {
  margin-top: 22px;
  max-width: 58ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(140deg, rgba(27, 92, 255, .26), rgba(123, 77, 255, .16));
  box-shadow: var(--shadow-1);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  min-height: 220px;
  object-fit: cover;
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(0, 245, 200, .18), transparent 55%),
    linear-gradient(180deg, transparent 52%, rgba(10, 16, 38, .88));
}

.page-about .about-hero__label {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 2;
  color: var(--ink);
  font-size: .8rem;
  letter-spacing: .02em;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding-top: 56px;
}

.page-about .about-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}

.page-about .about-rail__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-rail__statement {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--neon);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-rail__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-rail__stats .stat {
  padding: 12px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .02);
}

.page-about .about-rail__stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.28rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--neon);
}

.page-about .about-rail__stats .stat__label {
  display: block;
  margin-top: 6px;
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 目录 ---------- */
.page-about .about-toc {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.page-about .about-toc__link {
  display: block;
  position: relative;
  padding: 7px 0 7px 16px;
  color: var(--ink-soft);
  font-size: .93rem;
  text-decoration: none;
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}

.page-about .about-toc__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 1px;
  background: var(--line);
  transform: translateY(-50%);
  transition: width .2s var(--ease), background .2s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link[aria-current="true"] {
  color: var(--neon);
  padding-left: 20px;
}

.page-about .about-toc__link:hover::before,
.page-about .about-toc__link[aria-current="true"]::before {
  width: 12px;
  background: var(--neon);
}

/* ---------- 章节流 ---------- */
.page-about .about-flow {
  display: grid;
  gap: 52px;
  min-width: 0;
}

.page-about .about-chapter {
  scroll-margin-top: calc(var(--header-h) + 26px);
  min-width: 0;
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--line);
  padding-top: 46px;
}

.page-about .about-chapter h2 {
  margin: 12px 0 0;
  font-size: clamp(1.55rem, 4.8vw, 2.3rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
  font-weight: 800;
}

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

/* ---------- 三条原则 ---------- */
.page-about .about-tenets {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-tenets__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--violet);
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, rgba(123, 77, 255, .09), rgba(10, 16, 38, 0) 64%);
  transition: border-left-color .25s var(--ease), transform .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .about-tenets__item:hover {
  border-left-color: var(--neon);
  transform: translateX(5px);
  box-shadow: var(--shadow-1);
}

.page-about .about-tenets__num {
  padding-top: 3px;
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--neon);
}

.page-about .about-tenets__item h3 {
  margin: 0 0 6px;
  font-size: 1.04rem;
  font-weight: 700;
}

.page-about .about-tenets__item p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 服务范围图与数字 ---------- */
.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-figure .media__label {
  display: block;
  margin-top: 10px;
  font-size: .8rem;
  color: var(--muted);
}

.page-about .about-metrics {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
}

.page-about .about-metrics__item {
  padding: 20px 18px;
  background: var(--bg-2);
}

.page-about .about-metrics__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.85rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  background: linear-gradient(120deg, var(--neon), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-metrics__label {
  display: block;
  margin-top: 9px;
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .about-metrics__item p {
  margin: 10px 0 0;
  font-size: .89rem;
  line-height: 1.66;
  color: var(--ink-soft);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cycle {
  margin-top: 26px;
  display: grid;
  gap: 12px;
}

.page-about .about-cycle__row {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(27, 92, 255, .06);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-cycle__row:hover {
  border-color: rgba(0, 245, 200, .5);
  background: rgba(0, 245, 200, .05);
}

.page-about .about-cycle__row .tag {
  justify-self: start;
}

.page-about .about-cycle__text h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .about-cycle__text p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-inline-link {
  margin: 20px 0 0;
  font-size: .93rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-inline-link a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 245, 200, .38);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-inline-link a:hover {
  border-bottom-color: var(--neon);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-wrap {
  margin-top: 26px;
  display: grid;
  gap: 30px;
}

.page-about .about-timeline-media {
  margin: 0;
}

.page-about .about-timeline-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  opacity: .9;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--neon), var(--violet) 58%, transparent);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px 30px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--blue);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.page-about .about-timeline__item:hover::before {
  border-color: var(--neon);
  box-shadow: 0 0 0 5px rgba(0, 245, 200, .15);
}

.page-about .about-timeline__body {
  padding: 12px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__body {
  border-color: var(--line);
  background: rgba(255, 255, 255, .025);
}

.page-about .about-timeline__year {
  margin: 0;
  font-size: .76rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .about-timeline__body h3 {
  margin: 8px 0 6px;
  font-size: 1.05rem;
  font-weight: 700;
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-partners {
  margin-top: 26px;
}

.page-about .about-partners__item {
  padding: 22px 20px;
}

.page-about .about-partners__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--neon);
}

.page-about .about-partners__item h3 {
  margin: 12px 0 8px;
  font-size: 1rem;
  font-weight: 700;
}

.page-about .about-partners__item p {
  margin: 0;
  font-size: .91rem;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-cta__inner h2 {
  margin: 0;
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 800;
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: .96rem;
  line-height: 1.75;
  color: var(--ink-soft);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-cycle__row {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: start;
    gap: 20px;
  }

  .page-about .about-cycle__row .tag {
    margin-top: 2px;
  }
}

@media (min-width: 760px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 52px;
    align-items: center;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 44px;
  }

  .page-about .about-cta__links {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 76px;
    align-items: start;
  }

  .page-about .about-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 40px;
    align-items: start;
  }
}
<<<END>>>