.page-about {
  --about-rail-w: 92px;
  --about-deep: #071612;
  --about-warm-line: rgba(244, 241, 234, 0.12);
  display: block;
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .breadcrumb ol {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .breadcrumb li[aria-current="page"] {
  color: var(--paper);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding: clamp(72px, 11vw, 150px) 0 clamp(56px, 8vw, 110px);
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(198, 255, 61, 0.10), transparent 58%),
    linear-gradient(168deg, #0B1F1A 0%, #071612 70%, #050f0c 100%);
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero__plates {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__plate {
  position: absolute;
  display: block;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-about .about-hero__plate--lime {
  top: -90px;
  right: -110px;
  width: clamp(220px, 34vw, 470px);
  height: clamp(300px, 42vw, 560px);
  background: linear-gradient(200deg, rgba(198, 255, 61, 0.18), rgba(198, 255, 61, 0));
  transform: rotate(-9deg);
}

.page-about .about-hero__plate--orange {
  bottom: -140px;
  left: -80px;
  width: clamp(180px, 26vw, 360px);
  height: clamp(180px, 26vw, 360px);
  background: linear-gradient(20deg, rgba(255, 122, 47, 0.16), rgba(255, 122, 47, 0));
  transform: rotate(12deg);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(40px, 8.4vw, 96px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-hero__title-em {
  position: relative;
  display: inline-block;
  color: var(--lime);
}

.page-about .about-hero__title-em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.14em;
  background: var(--orange);
  opacity: 0.55;
  transform: skewX(-12deg);
  z-index: -1;
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(40px, 6vw, 72px);
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--cut-shape);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--charcoal);
  transition: background 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-hero__stat:hover,
.page-about .about-hero__stat:focus-within {
  background: #17201d;
  transform: translateY(-4px);
}

.page-about .about-hero__stat-num {
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-hero__stat-num--orange {
  color: var(--orange);
}

.page-about .about-hero__stat-unit {
  font-size: 0.5em;
  margin-left: 2px;
}

.page-about .about-hero__stat-label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ============ 通用小节间距 ============ */
.page-about .section {
  padding: clamp(56px, 8vw, 110px) 0;
}

.page-about .section + .section {
  border-top: 1px solid var(--about-warm-line);
}

.page-about .section-head--wide {
  max-width: 46em;
}

.page-about .section-note {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ============ 我们做什么 ============ */
.page-about .about-intro__index {
  margin: 0;
  font-size: 12px;
  line-height: 1.9;
  color: var(--slate);
  letter-spacing: 0.14em;
}

.page-about .about-intro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 3vw, 38px);
}

.page-about .about-intro__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-intro__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-intro__num {
  font-size: 26px;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-intro__num--orange {
  color: var(--orange);
}

.page-about .about-intro__unit {
  font-size: 0.55em;
  margin-left: 1px;
}

/* ============ 时间轴 ============ */
.page-about .about-timeline__wrap {
  position: relative;
  margin-top: clamp(40px, 5vw, 66px);
  padding-left: 26px;
}

.page-about .about-timeline__rail {
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 0;
  width: 2px;
  pointer-events: none;
}

.page-about .about-timeline__rail-line {
  display: block;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, var(--lime) 0%, rgba(198, 255, 61, 0.25) 45%, rgba(255, 122, 47, 0.35) 100%);
  transform: skewX(-3deg);
  transform-origin: top;
}

.page-about .about-timeline__rail-nodes {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.page-about .about-timeline__rail-nodes i {
  display: block;
  width: 10px;
  height: 10px;
  margin-left: -4px;
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.35;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5vw, 64px);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding-left: 8px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--slate);
  box-shadow: 0 0 0 4px var(--ink);
  transition: background 0.3s var(--ease);
}

.page-about .about-timeline__item.is-lit::before {
  background: var(--lime);
}

.page-about .about-timeline__year {
  font-size: clamp(30px, 4.6vw, 54px);
  line-height: 1;
  color: var(--paper);
  letter-spacing: -0.02em;
  opacity: 0.92;
}

.page-about .about-timeline__title {
  margin: 6px 0 12px;
  font-size: clamp(19px, 1.9vw, 25px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-timeline__body .btn--text {
  margin-top: 16px;
}

.page-about .about-timeline__media {
  margin-bottom: 20px;
}

.page-about .about-timeline__media .media-caption {
  margin-top: 10px;
}

/* 桌面端错位 */
@media (min-width: 768px) {
  .page-about .about-timeline__wrap {
    padding-left: var(--about-rail-w);
  }

  .page-about .about-timeline__item {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
    padding-left: 0;
  }

  .page-about .about-timeline__item::before {
    left: calc(var(--about-rail-w) * -0.5 - 6px);
  }

  .page-about .about-timeline__year {
    font-size: clamp(36px, 4vw, 56px);
    text-align: right;
    position: sticky;
    top: 110px;
  }

  .page-about .about-timeline__rail {
    left: calc(var(--about-rail-w) * 0.5 - 1px);
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__body {
    margin-left: clamp(0px, 3vw, 48px);
  }

  .page-about .about-timeline__item:nth-child(odd) .about-timeline__body {
    margin-right: clamp(0px, 3vw, 48px);
  }
}

/* ============ 团队 ============ */
.page-about .about-team__aside .media-caption {
  margin-top: 12px;
}

.page-about .about-team__ring {
  list-style: none;
  margin: clamp(28px, 3.4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-team__seg {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num name"
    "num role";
  align-items: center;
  gap: 4px 18px;
  padding: 18px 20px;
  background: var(--charcoal);
  border: 1px solid var(--line);
  border-left: 4px solid var(--slate);
  clip-path: var(--cut-shape);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-team__seg:hover,
.page-about .about-team__seg:focus-visible {
  transform: translateY(-4px);
  outline: none;
}

.page-about .about-team__seg:focus-visible {
  box-shadow: 0 0 0 2px var(--lime);
}

.page-about .about-team__seg--lime {
  border-left-color: var(--lime);
}

.page-about .about-team__seg--orange {
  border-left-color: var(--orange);
}

.page-about .about-team__seg-num {
  grid-area: num;
  font-size: clamp(32px, 4vw, 44px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-team__seg--lime .about-team__seg-num {
  color: var(--lime);
}

.page-about .about-team__seg--orange .about-team__seg-num {
  color: var(--orange);
}

.page-about .about-team__seg-name {
  grid-area: name;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__seg-role {
  grid-area: role;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.6;
  opacity: 0.75;
  transition: opacity 0.24s var(--ease);
}

.page-about .about-team__seg:hover .about-team__seg-role,
.page-about .about-team__seg:focus-visible .about-team__seg-role {
  opacity: 1;
}

/* ============ 流程 ============ */
.page-about .about-flow__rail {
  list-style: none;
  margin: clamp(36px, 4.6vw, 60px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-flow__step {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--charcoal);
  border: 1px solid var(--line);
  clip-path: var(--cut-shape);
  transition: transform 0.26s var(--ease), background 0.26s var(--ease);
}

.page-about .about-flow__step:hover {
  transform: translateY(-4px);
  background: #17201d;
}

.page-about .about-flow__arrow {
  position: absolute;
  right: 18px;
  bottom: 16px;
  width: 26px;
  height: 2px;
  background: var(--lime);
  transform: rotate(-12deg);
  transform-origin: right center;
  transition: width 0.28s var(--ease);
}

.page-about .about-flow__step:hover .about-flow__arrow {
  width: 34px;
}

.page-about .about-flow__step--last .about-flow__arrow {
  display: none;
}

.page-about .about-flow__stepno {
  display: block;
  color: var(--lime);
  letter-spacing: 0.16em;
}

.page-about .about-flow__stepname {
  margin: 12px 0 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-flow__rail {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-flow__step {
    border-right: none;
    padding-right: 26px;
  }

  .page-about .about-flow__step:last-child {
    border-right: 1px solid var(--line);
  }
}

/* ============ 协作网络 ============ */
.page-about .about-network__awards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(30px, 3.6vw, 46px);
  background: var(--line);
  border: 1px solid var(--line);
  clip-path: var(--cut-shape);
}

.page-about .about-network__award {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--charcoal);
  transition: background 0.24s var(--ease);
}

.page-about .about-network__award:hover {
  background: #17201d;
}

.page-about .about-network__award-num {
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-network__award:nth-child(2) .about-network__award-num {
  color: var(--orange);
}

.page-about .about-network__award-unit {
  font-size: 0.55em;
}

.page-about .about-network__award-label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-network__banner {
  margin-top: clamp(36px, 4.6vw, 62px);
}

.page-about .about-network__banner-caption {
  margin-top: 12px;
}

/* ============ 服务承诺 ============ */
.page-about .about-promise__list {
  list-style: none;
  margin: clamp(34px, 4.4vw, 56px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-promise__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  align-items: start;
  padding: clamp(22px, 3vw, 34px) 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-about .about-promise__item:hover {
  background: rgba(198, 255, 61, 0.04);
  padding-left: 12px;
}

.page-about .about-promise__no {
  font-size: 14px;
  color: var(--lime);
  letter-spacing: 0.12em;
  padding-top: 6px;
}

.page-about .about-promise__name {
  margin: 0 0 8px;
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 800;
  color: var(--paper);
  letter-spacing: -0.01em;
}

.page-about .about-promise__text p {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

.page-about .about-promise__cta {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: clamp(32px, 4vw, 52px);
  padding: clamp(24px, 3vw, 34px);
  background: linear-gradient(100deg, rgba(198, 255, 61, 0.10), rgba(255, 122, 47, 0.06));
  border: 1px solid var(--line);
  clip-path: var(--cut-shape);
}

.page-about .about-promise__cta-text {
  margin: 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--paper);
}

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

/* ============ 图片通用 ============ */
.page-about .media-frame {
  overflow: hidden;
  background: var(--charcoal);
  border: 1px solid var(--line);
  clip-path: var(--cut-shape);
}

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

.page-about .media-4x3 { aspect-ratio: 4 / 3; }
.page-about .media-16x9 { aspect-ratio: 16 / 9; }

.page-about .media-caption {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ============ 网格补充 ============ */
@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-network__awards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-promise__cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .page-about .about-intro__grid,
  .page-about .about-team__grid {
    align-items: start;
  }
}

/* 焦点可见性 */
.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }
  .page-about .about-timeline__item::before {
    transition: none !important;
  }
}
<<<END>>>