.page-about {
  --about-ink-78: rgba(11, 43, 38, .78);
  --about-ink-76: rgba(11, 43, 38, .76);
  --about-rule: rgba(11, 43, 38, .18);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 108px 0 56px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -6% -10% auto -10%;
  height: 94%;
  background: linear-gradient(128deg, rgba(34, 211, 197, .16) 0%, rgba(15, 118, 110, .12) 36%, rgba(11, 43, 38, 0) 72%);
  clip-path: polygon(0 0, 100% 0, 100% 56%, 0 100%);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -16%;
  top: -20%;
  width: min(560px, 78vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(245, 158, 91, .2), rgba(245, 158, 91, 0) 66%);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(40px, 10.5vw, 88px);
  line-height: .96;
  letter-spacing: -.025em;
  margin: 12px 0 22px;
  color: var(--paper);
}

.page-about .about-hero__title-alt {
  color: var(--cyan);
}

.page-about .about-hero__lede {
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.85;
  color: var(--paper-70);
  max-width: 54ch;
  margin: 0 0 28px;
}

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

.page-about .about-hero__aside {
  border-top: 1px solid var(--hair-strong);
  padding-top: 22px;
}

.page-about .about-hero__annot {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--paper-35);
  margin-bottom: 14px;
}

.page-about .about-figures {
  margin: 0 0 18px;
}

.page-about .about-figures__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--hair);
}

.page-about .about-figures__row dt {
  font-size: 13px;
  color: var(--paper-50);
}

.page-about .about-figures__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .about-hero__note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--paper-35);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: 52px 0;
}

.page-about .about-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-band__rail {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

.page-about .about-band__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-band__vlabel {
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--paper-35);
}

.page-about .about-band__body {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-about .about-band__head {
  max-width: 780px;
  margin-bottom: 30px;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-size: clamp(27px, 4.6vw, 46px);
  line-height: 1.04;
  letter-spacing: -.018em;
  margin: 0 0 16px;
  color: var(--paper);
}

.page-about .about-p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--paper-70);
  max-width: 56ch;
  margin: 0 0 14px;
}

.page-about .about-p--wide {
  font-size: 15px;
  max-width: 68ch;
  margin-bottom: 0;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-points {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper-70);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 1px;
  background: var(--orange);
}

.page-about .about-code {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 28px;
  padding: 16px 18px;
  border: 1px solid var(--hair-strong);
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
}

.page-about .about-code__label {
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--paper-35);
}

.page-about .about-code__value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-code__btn {
  margin-left: auto;
  padding: 7px 14px;
  font-size: 12.5px;
}

.page-about .about-code__status {
  flex-basis: 100%;
  font-size: 12px;
  color: var(--yellow);
  min-height: 0;
}

.page-about .about-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--hair-strong);
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
}

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

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

.page-about .about-figcap {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--paper-35);
}

/* ---------- 能力演进时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 860px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 16px;
  bottom: -2px;
  width: 1px;
  background: var(--hair-strong);
}

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

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__mark {
  position: absolute;
  left: 0;
  top: 7px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__mark {
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--cyan-soft);
}

.page-about .about-timeline__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--orange);
  margin-bottom: 7px;
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.24;
  letter-spacing: -.01em;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper-70);
  max-width: 62ch;
}

/* ---------- 档案方法（米白纸张区） ---------- */
.page-about .about-section--paper {
  position: relative;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-section--paper::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(0deg, rgba(11, 43, 38, .03) 0 1px, transparent 1px 5px);
  pointer-events: none;
}

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

.page-about .about-section--paper .about-p,
.page-about .about-section--paper .about-p--wide {
  color: var(--about-ink-78);
}

.page-about .about-section--paper .about-band__num {
  color: var(--teal);
}

.page-about .about-section--paper .about-band__vlabel {
  color: rgba(11, 43, 38, .45);
}

.page-about .about-method__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-step {
  border-top: 1px solid var(--about-rule);
}

.page-about .about-step:last-of-type {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-step__sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-step__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--teal);
  min-width: 24px;
}

.page-about .about-step__name {
  flex: 1;
  font-family: var(--font-display);
  font-size: clamp(16px, 2.2vw, 20px);
  line-height: 1.3;
  color: var(--ink);
  transition: color .25s var(--ease);
}

.page-about .about-step__sum:hover .about-step__name {
  color: var(--teal);
}

.page-about .about-step__sign {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
}

.page-about .about-step__sign::before,
.page-about .about-step__sign::after {
  content: "";
  position: absolute;
  background: var(--teal);
}

.page-about .about-step__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-about .about-step__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  transition: transform .25s var(--ease);
}

.page-about .about-step[open] .about-step__sign::after {
  transform: translateX(-50%) scaleY(0);
}

.page-about .about-step__body {
  padding: 0 0 18px 38px;
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--about-ink-76);
  max-width: 58ch;
}

.page-about .about-method__side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-media--tall img {
  aspect-ratio: 14 / 9;
}

.page-about .about-gauge {
  padding: 16px 18px;
  background: var(--ink);
  color: var(--paper);
  border-left: 3px solid var(--orange);
}

.page-about .about-gauge__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-gauge__label {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--paper-70);
}

.page-about .about-cadence {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-cadence li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-cadence__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--teal);
}

.page-about .about-cadence__v {
  font-size: 13px;
  color: var(--about-ink-78);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-roles__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px 18px;
  padding: 15px 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-roles__item:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-roles__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-roles__name {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--paper);
}

.page-about .about-roles__desc {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--paper-50);
}

.page-about .about-team__side {
  display: grid;
  gap: 22px;
  align-content: start;
}

.page-about .about-columnists {
  padding: 20px;
  border: 1px solid var(--hair-strong);
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
}

.page-about .about-columnists__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .about-columnists__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-columnists__cap {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper-70);
}

.page-about .about-columnists__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-about .about-tag {
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
  border: 1px solid var(--hair-strong);
  background: rgba(34, 211, 197, .07);
}

.page-about .about-columnists__text {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--paper-70);
}

.page-about .about-inline-link {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
  outline: none;
}

.page-about .about-media--square img {
  aspect-ratio: 12 / 10;
}

/* ---------- 合作生态 ---------- */
.page-about .about-section--eco {
  background: var(--ink-2);
}

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .about-eco__lead {
  padding: 22px;
  border: 1px solid var(--hair-strong);
  background: linear-gradient(160deg, rgba(34, 211, 197, .12), rgba(11, 43, 38, 0) 70%);
}

.page-about .about-eco__big {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(48px, 11vw, 82px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .about-eco__bigcap {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--paper-70);
  max-width: 34ch;
}

.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-eco__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3px;
  padding: 14px 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-eco__row:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-eco__k {
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--paper-35);
}

.page-about .about-eco__v {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-eco__d {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper-70);
}

.page-about .about-eco__foot {
  margin: 26px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
  font-size: 13px;
  line-height: 1.75;
  color: var(--paper-50);
}

/* ---------- 选择理由 ---------- */
.page-about .about-why {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-why__item {
  padding: 20px;
  border: 1px solid var(--hair);
  border-left: 2px solid var(--teal);
  background: rgba(16, 59, 51, .5);
  transition: border-left-color .3s var(--ease), background .3s var(--ease);
}

.page-about .about-why__item:hover {
  border-left-color: var(--cyan);
  background: rgba(16, 59, 51, .82);
}

.page-about .about-why__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-why__title {
  font-family: var(--font-display);
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.3;
  letter-spacing: -.01em;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .about-why__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--paper-70);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  padding: 56px 0 72px;
  background: var(--ink-3);
  border-top: 1px solid var(--hair);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 38px);
  line-height: 1.1;
  letter-spacing: -.015em;
  margin: 0 0 12px;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper-70);
  max-width: 50ch;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-roles__item {
    grid-template-columns: 58px 132px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-eco__row {
    grid-template-columns: 120px 170px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }

  .page-about .about-why {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 148px 0 84px;
  }

  .page-about .about-section {
    padding: 84px 0;
  }

  .page-about .about-band {
    grid-template-columns: var(--rail-w) minmax(0, 1fr);
    gap: 40px;
  }

  .page-about .about-band__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    position: relative;
    padding-left: 16px;
    padding-top: 4px;
  }

  .page-about .about-band__rail::before {
    content: "";
    position: absolute;
    left: 0;
    top: 2px;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan) 0, var(--hair-strong) 38%, rgba(216, 210, 196, 0) 100%);
  }

  .page-about .about-section--paper .about-band__rail::before {
    background: linear-gradient(180deg, var(--teal) 0, rgba(11, 43, 38, .28) 38%, rgba(11, 43, 38, 0) 100%);
  }

  .page-about .about-band__vlabel {
    writing-mode: vertical-rl;
    letter-spacing: .36em;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .58fr);
    gap: 54px;
    align-items: end;
  }

  .page-about .about-hero__aside {
    border-top: 0;
    border-left: 1px solid var(--hair-strong);
    padding-top: 0;
    padding-left: 22px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1200px) {
  .page-about .about-why {
    grid-template-columns: 1fr 1fr;
    gap: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__mark,
  .page-about .about-step__sign::after,
  .page-about .about-step__name,
  .page-about .about-why__item,
  .page-about .about-inline-link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>