.page-about {
  --about-line: rgba(16, 34, 31, .14);
  --about-line-strong: rgba(16, 34, 31, .34);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about h2 {
  margin: 0;
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(24px, 5vw, 40px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .prose {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 42em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(30px, 5.4vw, 68px);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 70%, var(--paper) 100%);
  border-bottom: 1px solid var(--about-line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(11, 107, 91, .07) 0 1px, transparent 1px 76px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 82%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--ff-sans);
  font-weight: 800;
  font-size: clamp(32px, 7.6vw, 66px);
  line-height: 1.08;
  letter-spacing: -.02em;
  max-width: 15em;
  color: var(--ink);
}

.page-about .about-hero__hl {
  color: var(--jiang);
  background-image: linear-gradient(180deg, transparent 68%, rgba(232, 93, 42, .32) 68%);
}

.page-about .about-hero .lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
}

.page-about .about-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 12px;
  border-left: 3px solid var(--orange);
}

.page-about .about-hero__meta .mono-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ink-3);
}

.page-about .about-hero__meta strong {
  font-family: var(--ff-mono);
  font-size: clamp(17px, 2.2vw, 21px);
  font-weight: 700;
  color: var(--jiang);
  white-space: nowrap;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__fig {
  margin: 0;
  border: 1px solid var(--ink);
  padding: 8px;
  background: var(--white);
  box-shadow: 8px 8px 0 rgba(11, 107, 91, .13);
}

.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero__fig figcaption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink-3);
}

/* ---------- 章节索引带 ---------- */
.page-about .about-index {
  background: var(--night);
  color: var(--paper);
}

.page-about .about-index__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding-block: 12px 14px;
}

.page-about .about-index__label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--signal);
  border-right: 1px solid rgba(247, 241, 229, .3);
  padding-right: 16px;
}

.page-about .about-index__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 5px;
  margin: 0;
  padding: 0;
}

.page-about .about-index__list a {
  display: inline-block;
  padding: 5px 11px;
  font-size: 13px;
  color: rgba(247, 241, 229, .88);
  text-decoration: none;
  border: 1px solid rgba(247, 241, 229, .24);
  border-radius: 999px;
  transition: background var(--dur) ease, color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--white);
}

/* ---------- 长卷时间线 ---------- */
.page-about .about-path {
  padding: clamp(38px, 6vw, 84px) 0 clamp(30px, 4.4vw, 58px);
}

.page-about .about-path__head {
  display: grid;
  gap: 12px;
  max-width: 42em;
}

.page-about .about-path__ruler-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 4px;
}

.page-about .about-path__ruler {
  display: block;
  width: min(100%, 300px);
  height: 22px;
  color: var(--line-2);
}

.page-about .about-path__ruler-wrap .mono-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--jiang);
}

.page-about .about-path__list {
  position: relative;
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
}

.page-about .about-path__list::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--water) 0%, var(--jiang) 48%, var(--orange) 100%);
}

.page-about .about-step {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: clamp(22px, 3.2vw, 34px);
}

.page-about .about-step:last-child {
  padding-bottom: 0;
}

.page-about .about-step__num {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--jiang);
  border-radius: 50%;
  background: var(--paper);
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--jiang);
}

.page-about .about-step__body {
  padding-top: 4px;
}

.page-about .about-step__body h3 {
  margin: 0 0 6px;
  font-family: var(--ff-sans);
  font-weight: 700;
  font-size: clamp(16px, 2.1vw, 19px);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 44em;
}

.page-about .about-step__body a {
  color: var(--jiang);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(38px, 6vw, 84px) 0;
  background: var(--paper-2);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__head {
  display: grid;
  gap: 12px;
  max-width: 42em;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.6vw, 42px);
  margin-top: clamp(24px, 3.6vw, 38px);
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--ink);
  background: var(--white);
}

.page-about .about-team__figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--ink-3);
}

.page-about .about-team__item {
  border-top: 1px solid var(--about-line-strong);
}

.page-about .about-team__item:last-child {
  border-bottom: 1px solid var(--about-line-strong);
}

.page-about .about-team__item > summary {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--ff-sans);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--ink);
}

.page-about .about-team__item > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team__item > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ff-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--orange);
  transition: transform var(--dur) ease;
}

.page-about .about-team__item[open] > summary::after {
  transform: rotate(45deg);
}

.page-about .about-team__tag {
  display: inline-block;
  padding: 3px 8px;
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .06em;
  background: var(--jiang);
  color: var(--paper);
  border-radius: 1px;
  white-space: nowrap;
}

.page-about .about-team__item .disclosure__body p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 42em;
}

/* ---------- 校验流程 ---------- */
.page-about .about-flow {
  padding: clamp(38px, 6vw, 84px) 0;
  background: var(--paper);
}

.page-about .about-flow__head {
  display: grid;
  gap: 10px;
  max-width: 38em;
}

.page-about .about-flow__list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  padding: 0;
}

.page-about .about-flow__item {
  padding: 20px 20px 22px;
  background: var(--white);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--jiang);
}

.page-about .about-flow__item:nth-child(2) {
  border-top-color: var(--water);
}

.page-about .about-flow__item:nth-child(3) {
  border-top-color: var(--orange);
}

.page-about .about-flow__num {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-3);
}

.page-about .about-flow__item h3 {
  margin: 8px 0;
  font-family: var(--ff-sans);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-flow__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-flow__note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--signal);
  background: var(--mist);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 56em;
}

.page-about .about-flow__note a {
  color: var(--jiang);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  position: relative;
  padding: clamp(40px, 6.4vw, 88px) 0;
  background: var(--night);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-partners::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(70vw, 620px);
  aspect-ratio: 1;
  background: radial-gradient(circle at 50% 50%, rgba(67, 179, 158, .34), transparent 66%);
  pointer-events: none;
}

.page-about .about-partners__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

.page-about .about-partners h2 {
  color: var(--paper);
}

.page-about .about-partners__copy {
  display: grid;
  gap: 14px;
}

.page-about .about-partners__copy > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 241, 229, .82);
  max-width: 38em;
}

.page-about .about-partners__stats {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 6px 0 0;
  padding: 0;
}

.page-about .about-partners__stats li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(247, 241, 229, .26);
}

.page-about .about-partners__stats strong {
  font-family: var(--ff-serif);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1;
  color: var(--signal);
  white-space: nowrap;
}

.page-about .about-partners__stats span {
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(247, 241, 229, .82);
}

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

.page-about .about-partners__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid rgba(247, 241, 229, .28);
}

.page-about .about-partners__fig figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.65;
  color: rgba(247, 241, 229, .64);
}

/* ---------- 服务规模 ---------- */
.page-about .about-scale {
  padding: clamp(38px, 6vw, 84px) 0;
  background: var(--paper);
}

.page-about .about-scale__head {
  display: grid;
  gap: 12px;
  max-width: 40em;
}

.page-about .about-scale__grid {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  padding: 0;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-scale__item {
  background: var(--white);
  padding: 20px 18px 22px;
  transition: background var(--dur) ease;
}

.page-about .about-scale__item:hover,
.page-about .about-scale__item:focus-within {
  background: var(--mist);
}

.page-about .about-scale__value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0;
  font-family: var(--ff-mono);
  font-weight: 700;
  color: var(--jiang);
}

.page-about .about-scale__num {
  font-size: clamp(28px, 5vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
}

.page-about .about-scale__unit {
  font-size: 14px;
  color: var(--ink-2);
}

.page-about .about-scale__label {
  margin: 10px 0 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-scale__note {
  margin: 6px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-3);
  transition: opacity var(--dur) ease;
}

/* ---------- 咨询收束 ---------- */
.page-about .about-cta {
  padding: clamp(38px, 6vw, 84px) 0;
  background: linear-gradient(120deg, var(--jiang) 0%, var(--jiang-d) 58%, var(--night) 100%);
  color: var(--paper);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-cta h2 {
  color: var(--paper);
  margin-top: 6px;
}

.page-about .about-cta__copy > p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 241, 229, .86);
  max-width: 34em;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

.page-about .about-cta__panel {
  border: 1px dashed rgba(247, 241, 229, .55);
  border-radius: var(--rad);
  padding: clamp(18px, 3vw, 26px);
  background: rgba(16, 34, 31, .22);
}

.page-about .about-cta__panel .about-cta__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  margin: 0 0 14px;
  font-size: 14px;
}

.page-about .about-cta__line .mono-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--signal);
}

.page-about .about-copy {
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--paper);
  border-bottom: 1px dashed rgba(247, 241, 229, .6);
  cursor: pointer;
  word-break: break-all;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-copy:hover,
.page-about .about-copy:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-about .about-copy[data-copied] {
  color: var(--signal);
  border-bottom-style: solid;
}

.page-about .about-cta__panel .about-cta__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(247, 241, 229, .26);
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(247, 241, 229, .74);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-flow__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: center;
  }

  .page-about .about-step {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .about-path__list::before {
    left: 31px;
  }

  .page-about .about-step__num {
    width: 62px;
    height: 62px;
    font-size: 15px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .page-about .about-flow__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

  .page-about .about-partners__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    margin-top: 10px;
  }

  .page-about .about-partners__stats li {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 0 16px;
    border-bottom: 0;
    border-left: 1px solid rgba(247, 241, 229, .26);
  }

  .page-about .about-partners__stats li:first-child {
    padding-left: 0;
    border-left: 0;
  }

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

  .page-about .about-scale__note {
    opacity: .7;
  }

  .page-about .about-scale__item:hover .about-scale__note,
  .page-about .about-scale__item:focus-within .about-scale__note {
    opacity: 1;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero h1 {
    font-size: 68px;
  }

  .page-about .about-path__head {
    max-width: 48em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-scale__item,
  .page-about .about-scale__note,
  .page-about .about-copy,
  .page-about .about-team__item > summary::after {
    transition: none;
  }
}
<<<END>>>