.page-about {
  --ab-line: rgba(11, 59, 46, 0.16);
  --ab-line-soft: rgba(11, 59, 46, 0.08);
  --ab-cream-70: rgba(247, 244, 236, 0.72);
  --ab-cream-45: rgba(247, 244, 236, 0.45);
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.page-about .about-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--sage);
}

.page-about .about-eyebrow--light {
  color: var(--orange-soft);
}

.page-about .about-h2 {
  margin: 0 0 20px;
  max-width: 20em;
  font-size: clamp(23px, 3.5vw, 40px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--deep);
}

.page-about .about-h2--light {
  color: var(--white);
}

.page-about .about-h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 2.1vw, 19px);
  font-weight: 900;
  line-height: 1.42;
  color: var(--deep);
}

.page-about .about-h3--light {
  color: var(--white);
}

.page-about .about-p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: #2B332E;
}

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

.page-about .about-p--wide {
  max-width: 40em;
}

.page-about .about-p--light {
  color: var(--ab-cream-70);
  max-width: 40em;
}

/* ---------- 首屏 ---------- */

.page-about .about-cover {
  position: relative;
  padding: clamp(18px, 3vw, 30px) 0 clamp(72px, 11vw, 132px);
  background: var(--deep);
  color: var(--cream);
  overflow: hidden;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -140px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle at 42% 42%, rgba(255, 106, 19, 0.34), rgba(255, 106, 19, 0) 68%);
  pointer-events: none;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: clamp(36px, 6vw, 72px);
  background: var(--cream);
  clip-path: polygon(0 100%, 100% 10%, 100% 100%);
  pointer-events: none;
}

.page-about .about-crumbs {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(22px, 4vw, 44px);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ab-cream-45);
}

.page-about .about-crumbs a {
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) ease, color var(--dur) ease;
}

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

.page-about .about-cover__grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 34px;
}

.page-about .about-cover__title {
  margin: 0 0 20px;
  font-size: clamp(29px, 5.6vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-cover__lede {
  margin: 0 0 28px;
  max-width: 34em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: rgba(247, 244, 236, 0.84);
}

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

.page-about .about-cover .btn--line {
  color: var(--cream);
  background: transparent;
  border-color: rgba(247, 244, 236, 0.45);
}

.page-about .about-cover .btn--line:hover,
.page-about .about-cover .btn--line:focus-visible {
  color: var(--white);
  border-color: var(--orange);
}

.page-about .about-index {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(247, 244, 236, 0.26);
}

.page-about .about-index__row {
  display: grid;
  grid-template-columns: 5.6em minmax(0, 1fr);
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(247, 244, 236, 0.14);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-index__k {
  padding-top: 2px;
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--ab-cream-45);
}

.page-about .about-index__v {
  color: rgba(247, 244, 236, 0.94);
}

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

@media (min-width: 900px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(250px, 0.58fr);
    align-items: end;
    gap: clamp(36px, 6vw, 92px);
  }
}

/* ---------- 通用区块 ---------- */

.page-about .about-sec {
  position: relative;
  padding: clamp(52px, 8vw, 106px) 0;
}

.page-about .about-sec--structure {
  background: var(--cream);
}

.page-about .about-sec--process {
  background: linear-gradient(180deg, var(--cream) 0%, #F2EEE3 100%);
}

.page-about .about-sec--timeline {
  background: #F2EEE3;
}

.page-about .about-sec--team {
  background: var(--cream);
}

.page-about .about-sec--partners {
  background: var(--cream);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  position: relative;
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--mid);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.page-about .about-figure__cap {
  position: relative;
  margin: 14px 0 0;
  padding-left: 16px;
  font-size: 12px;
  line-height: 1.75;
  letter-spacing: 0.05em;
  color: var(--sage);
}

.page-about .about-figure__cap::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.8em;
  width: 9px;
  height: 1px;
  background: var(--orange);
}

/* ---------- 起点 ---------- */

.page-about .about-origin__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-quote {
  position: relative;
  margin: 22px 0;
  padding: 20px 22px 20px 26px;
  background: var(--indigo);
  color: var(--white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--orange);
}

.page-about .about-quote p {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.7;
}

@media (min-width: 880px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(34px, 5vw, 76px);
    align-items: start;
  }
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
}

.page-about .about-metrics__cell {
  background: var(--white);
  padding: 20px 18px 22px;
}

.page-about .about-metrics__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--deep);
}

.page-about .about-metrics__label {
  display: block;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.05em;
  color: var(--sage);
}

.page-about .about-layers {
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  background: var(--ab-line-soft);
  border-top: 1px solid var(--ab-line);
}

.page-about .about-layer {
  position: relative;
  padding: 24px 0 24px 22px;
  border-left: 3px solid var(--mid);
}

.page-about .about-layer:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .about-layer:nth-child(3) {
  border-left-color: var(--blue);
}

.page-about .about-layer .about-p {
  max-width: 34em;
  margin-bottom: 0;
}

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

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

  .page-about .about-layer {
    padding: 26px 26px 26px 24px;
  }
}

/* ---------- 工序 ---------- */

.page-about .about-process__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-steps {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
}

.page-about .about-steps__item {
  position: relative;
  background: var(--white);
  padding: 22px 22px 24px;
  transition: background var(--dur) ease;
  overflow: hidden;
}

.page-about .about-steps__item::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 24px 24px 0;
  border-color: transparent var(--orange-soft) transparent transparent;
  opacity: 0;
  transition: opacity var(--dur) ease;
}

.page-about .about-steps__item:hover::after,
.page-about .about-steps__item:focus-within::after {
  opacity: 1;
}

.page-about .about-steps__item:hover {
  background: #FBF8F1;
}

.page-about .about-steps__no {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-steps__item .about-p {
  font-size: 14.5px;
  line-height: 1.78;
  margin-bottom: 0;
}

.page-about .about-figure--process {
  align-self: start;
}

@media (min-width: 720px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .about-process__grid {
    grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr);
    gap: clamp(38px, 5vw, 82px);
    align-items: start;
  }
}

/* ---------- 时间轴 ---------- */

.page-about .about-tl {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--deep) 0%, var(--wine) 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 28px 36px;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #F2EEE3;
  border: 2px solid var(--deep);
  transition: background var(--dur) ease, border-color var(--dur) ease, transform var(--dur) ease;
}

.page-about .about-tl__item:hover::before,
.page-about .about-tl__item:focus-within::before {
  background: var(--orange);
  border-color: var(--orange);
  transform: scale(1.25);
}

.page-about .about-tl__year {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--deep);
}

.page-about .about-tl__card {
  position: relative;
  padding: 18px 22px 20px;
  background: var(--white);
  border: 1px solid var(--ab-line);
  transition: border-color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .about-tl__card::after {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 20px;
  height: 20px;
  background: #F2EEE3;
  clip-path: polygon(0 0, 100% 0, 100% 100%);
  transition: background var(--dur) ease;
}

.page-about .about-tl__item:hover .about-tl__card {
  border-color: var(--orange-soft);
  box-shadow: 0 16px 34px -26px rgba(11, 59, 46, 0.55);
}

.page-about .about-tl__item:hover .about-tl__card::after {
  background: var(--orange);
}

.page-about .about-tl__ver {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--wine);
  background: rgba(122, 31, 61, 0.09);
}

.page-about .about-tl__card .about-p {
  font-size: 14.5px;
  line-height: 1.78;
  margin-bottom: 0;
}

@media (min-width: 860px) {
  .page-about .about-tl::before {
    left: 118px;
  }

  .page-about .about-tl__item {
    display: grid;
    grid-template-columns: 118px minmax(0, 1fr);
    padding: 0 0 26px 0;
  }

  .page-about .about-tl__item::before {
    left: 113px;
    top: 12px;
  }

  .page-about .about-tl__year {
    justify-content: flex-end;
    padding-right: 34px;
    margin-bottom: 0;
    padding-top: 10px;
  }

  .page-about .about-tl__card {
    margin-left: 34px;
  }
}

/* ---------- 团队 ---------- */

.page-about .about-split {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 30px 0 0;
}

.page-about .about-split__seg {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 84px;
  padding: 16px 18px;
  color: var(--white);
  background: var(--deep);
  transition: transform var(--dur) ease, box-shadow var(--dur) ease, filter var(--dur) ease;
}

.page-about .about-split__seg--eng {
  background: var(--mid);
}

.page-about .about-split__seg--ops {
  background: var(--wine);
}

.page-about .about-split__seg--cs {
  background: var(--indigo);
}

.page-about .about-split__seg:hover,
.page-about .about-split__seg:focus-visible {
  transform: translateY(-4px);
  box-shadow: 0 18px 34px -22px rgba(11, 59, 46, 0.7);
  filter: brightness(1.08);
  outline: none;
}

.page-about .about-split__seg:focus-visible {
  box-shadow: 0 0 0 3px var(--orange), 0 18px 34px -22px rgba(11, 59, 46, 0.7);
}

.page-about .about-split__num {
  font-size: clamp(26px, 3.4vw, 36px);
  line-height: 1;
  color: var(--orange);
}

.page-about .about-split__role {
  font-size: 13.5px;
  font-weight: 900;
  line-height: 1.4;
}

.page-about .about-split__duty {
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--dur) ease;
}

.page-about .about-split__seg:hover .about-split__duty,
.page-about .about-split__seg:focus-visible .about-split__duty {
  color: rgba(255, 255, 255, 0.96);
}

.page-about .about-team__grid {
  display: grid;
  gap: 32px;
  margin-top: 34px;
}

.page-about .about-team__body .about-p {
  max-width: 34em;
}

@media (min-width: 720px) {
  .page-about .about-split {
    flex-direction: row;
    gap: 2px;
  }

  .page-about .about-split__seg {
    min-height: 156px;
    justify-content: space-between;
  }

  .page-about .about-split__seg--editor {
    flex: 9 1 0;
  }

  .page-about .about-split__seg--eng {
    flex: 6 1 0;
  }

  .page-about .about-split__seg--ops {
    flex: 7 1 0;
  }

  .page-about .about-split__seg--cs {
    flex: 4 1 0;
  }
}

@media (min-width: 940px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(34px, 5vw, 74px);
    align-items: start;
  }
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners__grid {
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  background: var(--ab-line-soft);
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
}

.page-about .about-partners__cell {
  padding: 26px 22px 28px;
  border-left: 3px solid var(--mid);
  background: var(--cream);
}

.page-about .about-partners__cell:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .about-partners__cell:nth-child(3) {
  border-left-color: var(--blue);
}

.page-about .about-partners__num {
  display: block;
  margin-bottom: 10px;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1;
  color: var(--deep);
}

.page-about .about-partners__cell .about-p {
  font-size: 14.5px;
  line-height: 1.78;
  margin-bottom: 0;
}

.page-about .about-uses {
  margin: 34px 0 0;
  padding: 24px 22px;
  background: var(--indigo);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-uses .about-h3 {
  color: var(--white);
  margin-bottom: 16px;
}

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

.page-about .about-uses__list li {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(247, 244, 236, 0.16);
}

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

.page-about .about-uses__role {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .about-uses__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(247, 244, 236, 0.86);
}

@media (min-width: 760px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-uses__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 28px;
  }

  .page-about .about-uses__list li {
    border-bottom: 0;
    padding-bottom: 0;
  }
}

/* ---------- 资质 ---------- */

.page-about .about-cred {
  position: relative;
  padding: clamp(72px, 10vw, 124px) 0 clamp(50px, 7vw, 88px);
  background: var(--wine);
  color: var(--cream);
  overflow: hidden;
}

.page-about .about-cred::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: clamp(30px, 5vw, 62px);
  background: var(--cream);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  pointer-events: none;
}

.page-about .about-cred__list {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(247, 244, 236, 0.2);
  border: 1px solid rgba(247, 244, 236, 0.2);
}

.page-about .about-cred__item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(11, 59, 46, 0.22);
}

.page-about .about-cred__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange-soft);
}

.page-about .about-cred__v {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(247, 244, 236, 0.94);
}

.page-about .about-cred__v .mono {
  color: var(--mint);
}

.page-about .about-cred__cta {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.86);
}

.page-about .about-cred__cta .link-grow {
  color: var(--orange-soft);
}

@media (min-width: 720px) {
  .page-about .about-cred__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-cred__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 下一页指引 ---------- */

.page-about .about-next {
  position: relative;
  padding: clamp(56px, 8vw, 96px) 0 clamp(60px, 8vw, 100px);
  background: var(--indigo);
  color: var(--cream);
}

.page-about .about-next::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: repeating-linear-gradient(90deg, var(--orange) 0 20px, rgba(255, 106, 19, 0) 20px 38px);
}

.page-about .about-next__list {
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(247, 244, 236, 0.18);
  border: 1px solid rgba(247, 244, 236, 0.18);
}

.page-about .about-next__item {
  padding: 24px 22px 26px;
  background: rgba(11, 59, 46, 0.3);
  transition: background var(--dur) ease;
}

.page-about .about-next__item:hover {
  background: rgba(11, 59, 46, 0.52);
}

.page-about .about-next__no {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .about-next__desc {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(247, 244, 236, 0.82);
}

.page-about .about-next__link {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--orange-soft);
  text-decoration: none;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  color: var(--orange);
}

@media (min-width: 780px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 窄屏收口 ---------- */

@media (max-width: 420px) {
  .page-about .about-index__row {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .page-about .about-metrics {
    grid-template-columns: 1fr;
  }
}
<<<END>>>