.page-about {
  --about-gap: clamp(28px, 5vw, 68px);
  --about-rule: rgba(166, 255, 244, .14);
  --about-rule-soft: rgba(166, 255, 244, .08);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(32px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -18%;
  width: min(620px, 88vw);
  height: min(620px, 88vw);
  background: radial-gradient(circle at 50% 50%, rgba(43, 231, 208, .14), rgba(43, 231, 208, 0) 62%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}

.page-about .about-hero__lead .crumbs {
  margin-bottom: 18px;
}

.page-about .about-hero__lead h1 {
  margin: 14px 0 18px;
  font-family: var(--font-sans);
  font-size: clamp(31px, 6.2vw, 62px);
  line-height: 1.14;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-hero__lead .lede {
  max-width: 42ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
}

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 24px 0 0;
  padding: 0;
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--about-rule);
  background: rgba(13, 33, 56, .55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}

.page-about .about-hero__facts .mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--amber);
  font-size: 15px;
}

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

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--about-rule);
  background: linear-gradient(150deg, rgba(22, 51, 79, .92), rgba(13, 33, 56, .96));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.72) contrast(1.05);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-hero__visual figcaption {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-hero__visual figcaption .mono {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  color: var(--cyan);
  letter-spacing: .06em;
}

/* ---------- 页内索引条 ---------- */
.page-about .about-anchors {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px 0 14px;
  border-top: 1px solid var(--about-rule-soft);
  border-bottom: 1px solid var(--about-rule-soft);
  scrollbar-width: none;
}

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

.page-about .about-anchors .anchor-bar__link {
  flex: 0 0 auto;
  white-space: nowrap;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-size: 13px;
}

.page-about .about-anchors .mono {
  font-family: var(--font-mono);
  color: var(--amber);
  font-size: 11px;
  letter-spacing: .05em;
}

/* ---------- 通用段落头 ---------- */
.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(23px, 3.8vw, 38px);
  line-height: 1.28;
  letter-spacing: -.015em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-sec__head {
  margin-bottom: clamp(20px, 3.5vw, 38px);
}

.page-about .about-sec__lede {
  margin: 14px 0 0;
  max-width: 46ch;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 为什么做 ---------- */
.page-about .about-why__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-why__text p {
  margin: 16px 0 0;
  color: var(--mist);
  font-size: 15.5px;
  line-height: 1.9;
  max-width: 44ch;
}

.page-about .about-why__text p:first-of-type {
  color: var(--paper);
}

.page-about .about-indexcard {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--about-rule);
  background: linear-gradient(165deg, rgba(22, 51, 79, .8), rgba(13, 33, 56, .7));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-indexcard::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 62px;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), rgba(255, 181, 71, 0));
}

.page-about .about-indexcard h3 {
  margin: 0 0 16px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: -.01em;
}

.page-about .about-indexcard__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-indexcard__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--about-rule-soft);
  font-size: 14.5px;
  color: var(--paper);
}

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

.page-about .about-indexcard__list .mono {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .05em;
}

/* ---------- 使用场景 ---------- */
.page-about .about-scenes__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-scene {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--about-rule);
  background: rgba(13, 33, 56, .68);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

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

.page-about .about-scene--b {
  border-top: 2px solid var(--amber);
  background: rgba(22, 51, 79, .6);
}

.page-about .about-scene--c {
  border-top: 2px solid var(--red);
  background: rgba(13, 33, 56, .8);
}

.page-about .about-scene__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-scene h3 {
  margin: 0 0 12px;
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.45;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-scene p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-scene__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-rule-soft);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--amber-soft);
}

/* ---------- 编辑流程 ---------- */
.page-about .about-workflow__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--about-rule);
  background: linear-gradient(150deg, rgba(22, 51, 79, .7), rgba(13, 33, 56, .85));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.7) contrast(1.04);
}

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

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

.page-about .about-flow__item {
  position: relative;
  padding: 16px 18px 16px 62px;
  border: 1px solid var(--about-rule-soft);
  border-left: 1px solid var(--about-rule);
  background: rgba(13, 33, 56, .55);
}

.page-about .about-flow__item:hover {
  background: rgba(22, 51, 79, .7);
}

.page-about .about-flow__num {
  position: absolute;
  top: 15px;
  left: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-flow__item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-flow__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 覆盖规模 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-metrics .stat {
  display: block;
  padding: 18px 16px 16px;
  border: 1px solid var(--about-rule);
  border-top: 2px solid var(--amber);
  background: linear-gradient(160deg, rgba(22, 51, 79, .78), rgba(13, 33, 56, .66));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.page-about .about-metrics .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.6vw, 42px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--amber);
}

.page-about .about-metrics .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-figure--map {
  margin-top: clamp(22px, 4vw, 40px);
}

/* ---------- 发展节点 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 7px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(43, 231, 208, .05));
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 30px;
  margin-bottom: 14px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 2px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

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

.page-about .about-tl__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 13px 16px;
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--about-rule);
  background: linear-gradient(135deg, rgba(22, 51, 79, .72), rgba(13, 33, 56, .55));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color .25s ease, background .25s ease;
}

.page-about .about-tl__head::-webkit-details-marker {
  display: none;
}

.page-about .about-tl__head::marker {
  content: "";
}

.page-about .about-tl__head:hover {
  border-color: rgba(43, 231, 208, .4);
}

.page-about .about-tl[open] > .about-tl__head {
  border-color: rgba(43, 231, 208, .45);
  background: linear-gradient(135deg, rgba(22, 51, 79, .9), rgba(13, 33, 56, .72));
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-tl__title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-tl__body {
  margin: 10px 2px 0;
  padding: 0 2px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 60ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-team__card {
  padding: 20px 18px;
  border: 1px solid var(--about-rule-soft);
  border-bottom: 2px solid var(--cyan);
  background: rgba(13, 33, 56, .6);
}

.page-about .about-team__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-team__strip {
  margin-top: clamp(20px, 3.5vw, 34px);
  padding: 20px 22px;
  border-left: 3px solid var(--amber);
  background: linear-gradient(90deg, rgba(255, 181, 71, .12), rgba(255, 181, 71, 0));
}

.page-about .about-team__strip p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--paper);
}

.page-about .about-team__strip .mono {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--amber);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-principles__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-principles__list li {
  position: relative;
  padding: 22px 0 22px 48px;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-principles__num {
  position: absolute;
  top: 24px;
  left: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-principles__list h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-principles__list p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-about .about-next__inner {
  position: relative;
  padding: clamp(24px, 4vw, 42px) clamp(20px, 4vw, 44px);
  border: 1px solid var(--about-rule);
  background:
    radial-gradient(circle at 88% 12%, rgba(43, 231, 208, .16), rgba(43, 231, 208, 0) 58%),
    radial-gradient(circle at 6% 92%, rgba(255, 181, 71, .14), rgba(255, 181, 71, 0) 55%),
    rgba(13, 33, 56, .78);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-next__text p {
  margin: 14px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 移动端以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-scenes__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-scene--c {
    grid-column: 1 / -1;
  }

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

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

  .page-about .about-anchors {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-why__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-workflow__grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }

  .page-about .about-figure--flow {
    position: sticky;
    top: 24px;
  }

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

  .page-about .about-scene--a {
    margin-top: 0;
  }

  .page-about .about-scene--b {
    margin-top: 34px;
  }

  .page-about .about-scene--c {
    grid-column: auto;
    margin-top: 68px;
  }

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

  .page-about .about-next__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 32px;
    align-items: center;
  }

  .page-about .about-next__actions {
    margin-top: 0;
    justify-content: flex-end;
  }
}

@media (min-width: 1100px) {
  .page-about .about-timeline::before {
    left: 96px;
  }

  .page-about .about-timeline__item {
    padding-left: 128px;
  }

  .page-about .about-timeline__item::before {
    left: 91px;
    top: 18px;
  }

  .page-about .about-tl__head {
    padding: 14px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__head,
  .page-about .about-flow__item {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>