.page-about {
  --about-line: rgba(53, 242, 196, 0.18);
  --about-line-soft: rgba(232, 239, 234, 0.12);
  --about-card: rgba(30, 58, 52, 0.55);
  background: var(--ink);
  color: var(--fog);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  letter-spacing: 0.01em;
  line-height: 1.12;
  margin: 0;
}

.page-about p {
  margin: 0;
  line-height: 1.75;
}

.page-about .eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

/* ---------- 首屏 ---------- */
.about-hero {
  position: relative;
  padding: 26px 0 clamp(52px, 8vw, 100px);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(53, 242, 196, 0.16), transparent 58%),
    radial-gradient(90% 70% at 8% 96%, rgba(255, 138, 61, 0.1), transparent 62%),
    linear-gradient(160deg, var(--pine) 0%, var(--pine-2) 62%, var(--ink-deep) 100%);
  border-bottom: 1px solid var(--about-line);
}

.about-hero__grain {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(115deg, transparent 42%, rgba(53, 242, 196, 0.06) 42.4%, transparent 43%),
    linear-gradient(115deg, transparent 61%, rgba(232, 239, 234, 0.05) 61.3%, transparent 62%);
}

.about-hero__crumb {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(24px, 5vw, 48px);
}

.about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 54px);
  align-items: start;
}

.about-hero h1 {
  margin: 0 0 22px;
  font-size: clamp(2.15rem, 7vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 15ch;
}

.about-hero__lead {
  font-size: clamp(15px, 2.4vw, 18px);
  color: var(--fog);
  max-width: 46ch;
}

.about-hero__note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--fog-dim);
  max-width: 44ch;
}

.about-hero__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 22px 0 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  border-top: 1px solid var(--about-line-soft);
}

.about-hero__num {
  display: block;
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.about-hero__num em {
  font-style: normal;
  color: var(--orange);
}

.about-hero__unit {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--fog-dim);
}

.about-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-line-soft);
  background: var(--ink-deep);
}

.about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  filter: saturate(0.9) contrast(1.05);
}

.about-hero__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fog);
  background: linear-gradient(to top, rgba(7, 15, 14, 0.92), transparent);
}

/* ---------- 场景区 ---------- */
.about-pains {
  padding: clamp(56px, 9vw, 110px) 0;
  background: var(--fog);
  color: var(--pine);
}

.about-pains .eyebrow {
  color: var(--teal);
}

.about-pains__head {
  max-width: 62ch;
  margin-bottom: clamp(30px, 5vw, 52px);
}

.about-pains h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  color: var(--pine);
  margin-bottom: 16px;
}

.about-pains__intro {
  font-size: 15px;
  color: #33524a;
}

.about-pains__grid {
  display: grid;
  gap: 16px;
}

.about-pains__card {
  padding: 24px 22px 26px;
  background: var(--white);
  border: 1px solid rgba(11, 43, 38, 0.1);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.about-pains__card h3 {
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
  color: var(--pine);
}

.about-pains__card p {
  font-size: 14px;
  color: #3f5f57;
}

.about-pains__card .tag {
  align-self: flex-start;
}

.about-pains__card--focus {
  background: linear-gradient(150deg, var(--pine) 0%, var(--pine-2) 100%);
  border-color: transparent;
  color: var(--fog);
}

.about-pains__card--focus h3 {
  color: var(--white);
}

.about-pains__card--focus p {
  color: var(--fog-soft);
}

.about-pains__link {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  align-self: flex-start;
  padding-bottom: 2px;
}

.about-pains__card--focus .about-pains__link {
  color: var(--cyan);
}

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

/* ---------- 方法区 ---------- */
.about-method {
  padding: clamp(56px, 9vw, 110px) 0;
  background:
    linear-gradient(180deg, var(--ink) 0%, var(--pine-2) 100%);
}

.about-method__grid {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  align-items: start;
}

.about-method h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  color: var(--white);
  margin-bottom: 16px;
}

.about-method__lead {
  font-size: 15px;
  color: var(--fog-soft);
  max-width: 48ch;
}

.about-method__steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.about-method__step {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 16px 20px 0;
  border-top: 1px solid var(--about-line-soft);
}

.about-method__step:last-child {
  border-bottom: 1px solid var(--about-line-soft);
}

.about-method__idx {
  font-size: 15px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.04em;
  padding-top: 3px;
}

.about-method__step h3 {
  font-size: 1.05rem;
  color: var(--cyan);
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}

.about-method__step p {
  font-size: 14px;
  color: var(--fog-soft);
}

.about-method__tail {
  margin-top: 26px;
  padding: 16px 18px;
  border-left: 3px solid var(--teal);
  background: rgba(53, 242, 196, 0.06);
  font-size: 14px;
  color: var(--fog);
}

.about-method__media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-line-soft);
  background: var(--ink-deep);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.about-method__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.about-method__media figcaption {
  padding: 12px 16px 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fog-dim);
}

/* ---------- 版本时间轴 ---------- */
.about-track {
  padding: clamp(56px, 9vw, 110px) 0;
  background: var(--panel);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.about-track__head {
  max-width: 60ch;
  margin-bottom: clamp(30px, 5vw, 50px);
}

.about-track h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  color: var(--white);
  margin-bottom: 16px;
}

.about-track__intro {
  font-size: 15px;
  color: var(--fog-soft);
}

.about-track__rail {
  position: relative;
  display: grid;
  gap: 10px;
}

.about-track__item {
  position: relative;
  background: rgba(11, 43, 38, 0.55);
  border: 1px solid var(--about-line-soft);
  border-radius: 12px;
  overflow: hidden;
}

.about-track__item[open] {
  border-color: var(--cyan);
}

.about-track__item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 4px 12px;
  padding: 16px 18px;
  align-items: center;
}

.about-track__item summary::-webkit-details-marker {
  display: none;
}

.about-track__dot {
  grid-row: 1 / span 2;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--panel);
  border: 2px solid var(--fog-dim);
  box-shadow: 0 0 0 4px rgba(53, 242, 196, 0.06);
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.about-track__item[open] .about-track__dot {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(53, 242, 196, 0.16);
}

.about-track__no {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--fog-dim);
}

.about-track__name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.02em;
}

.about-track__panel {
  padding: 0 18px 18px 48px;
}

.about-track__panel p {
  font-size: 14px;
  color: var(--fog-soft);
}

.about-track__media {
  margin: 26px 0 0;
  max-width: 420px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-line-soft);
}

.about-track__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 4;
}

.about-track__media figcaption {
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fog-dim);
  background: rgba(7, 15, 14, 0.5);
}

/* ---------- 团队 ---------- */
.about-team {
  padding: clamp(56px, 9vw, 110px) 0;
  background: var(--fog);
  color: var(--pine);
}

.about-team .eyebrow {
  color: var(--teal);
}

.about-team__head {
  max-width: 60ch;
  margin-bottom: clamp(30px, 5vw, 48px);
}

.about-team h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.7rem);
  color: var(--pine);
  margin-bottom: 16px;
}

.about-team__intro {
  font-size: 15px;
  color: #33524a;
}

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

.about-team__count {
  background: linear-gradient(155deg, var(--pine) 0%, var(--pine-2) 100%);
  border-radius: var(--radius);
  padding: 26px 22px;
  color: var(--fog);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.about-team__big {
  font-size: clamp(3rem, 12vw, 4.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.03em;
}

.about-team__count-label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fog-dim);
  margin-bottom: 20px;
}

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

.about-team__bars li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr) 34px;
  align-items: center;
  gap: 10px;
}

.about-team__bar-label {
  font-size: 12px;
  color: var(--fog-soft);
}

.about-team__bar {
  position: relative;
  height: 6px;
  border-radius: 3px;
  background: rgba(232, 239, 234, 0.14);
  overflow: hidden;
}

.about-team__bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--w, 50%);
  background: linear-gradient(90deg, var(--teal), var(--cyan));
  border-radius: 3px;
}

.about-team__bar-num {
  font-size: 13px;
  color: var(--white);
  text-align: right;
}

.about-team__card {
  background: var(--white);
  border: 1px solid rgba(11, 43, 38, 0.12);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.about-team__card summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--pine);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.about-team__card summary::-webkit-details-marker {
  display: none;
}

.about-team__card summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--teal);
  font-size: 16px;
}

.about-team__card[open] summary::after {
  content: "–";
  color: var(--orange);
}

.about-team__card p {
  margin-top: 12px;
  font-size: 14px;
  color: #3f5f57;
  border-top: 1px solid rgba(11, 43, 38, 0.1);
  padding-top: 12px;
}

/* ---------- 合作生态 ---------- */
.about-eco {
  padding: clamp(56px, 9vw, 110px) 0;
  background: linear-gradient(200deg, var(--ink-deep) 0%, var(--pine) 100%);
}

.about-eco__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.about-eco h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.6rem);
  color: var(--white);
  margin-bottom: 18px;
}

.about-eco__text p {
  font-size: 15px;
  color: var(--fog-soft);
  margin-bottom: 14px;
  max-width: 52ch;
}

.about-eco__award {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin-top: 6px;
}

.about-eco__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.about-eco__panel {
  background: var(--about-card);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius);
  padding: 24px 22px;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.about-eco__panel h3 {
  font-size: 1.05rem;
  color: var(--cyan);
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}

.about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.about-eco__list li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 4px 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-line-soft);
}

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

.about-eco__mark {
  grid-row: 1 / span 2;
  width: 8px;
  height: 8px;
  margin-top: 6px;
  background: var(--orange);
  transform: rotate(45deg);
}

.about-eco__list strong {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--white);
  letter-spacing: 0.02em;
}

.about-eco__list span:last-child {
  font-size: 13px;
  color: var(--fog-dim);
  line-height: 1.6;
}

/* ---------- 覆盖与联系 ---------- */
.about-reach {
  padding: clamp(56px, 9vw, 110px) 0 clamp(64px, 9vw, 110px);
  background: var(--ink-deep);
  border-top: 1px solid var(--about-line);
}

.about-reach__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.about-reach__map {
  position: relative;
  min-height: 200px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background-image:
    linear-gradient(rgba(53, 242, 196, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 242, 196, 0.1) 1px, transparent 1px);
  background-size: 34px 34px;
  background-position: center;
  overflow: hidden;
}

.about-reach__map::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 60%;
  background: radial-gradient(70% 100% at 40% 100%, rgba(53, 242, 196, 0.22), transparent 70%);
}

.about-reach__ping {
  position: absolute;
  top: 42%;
  left: 46%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 8px rgba(255, 138, 61, 0.18), 0 0 26px rgba(255, 138, 61, 0.6);
}

.about-reach h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.6rem);
  color: var(--white);
  margin-bottom: 16px;
}

.about-reach__body > p {
  font-size: 15px;
  color: var(--fog-soft);
  max-width: 52ch;
}

.about-reach__facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--about-line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.about-reach__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.about-reach__facts .data-num {
  font-size: clamp(1.1rem, 3.4vw, 1.5rem);
  font-weight: 700;
  color: var(--cyan);
}

.about-reach__facts span:last-child {
  font-size: 12px;
  color: var(--fog-dim);
}

.about-reach__contact {
  margin-top: 28px;
  padding: 18px 20px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 138, 61, 0.07);
  display: grid;
  gap: 10px;
}

.about-reach__contact p {
  font-size: 14px;
  color: var(--fog);
}

.about-reach__line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  color: var(--fog-soft);
}

.about-reach__line a {
  color: var(--cyan);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 13px;
  border-bottom: 1px solid rgba(53, 242, 196, 0.4);
}

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

.about-reach__line span {
  flex-basis: 100%;
  font-size: 12px;
  color: var(--fog-dim);
  line-height: 1.6;
}

.about-reach__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.about-reach__icp {
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fog-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .about-pains__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-pains__card--focus {
    grid-column: 1 / -1;
  }

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

  .about-team__count {
    grid-column: 1 / -1;
  }

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

@media (min-width: 960px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .about-hero__media {
    transform: translateY(6px) rotate(-1.2deg);
  }

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

  .about-pains__card--focus {
    grid-column: span 3;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    grid-template-rows: auto auto auto;
    column-gap: 34px;
    padding: 30px 30px 32px;
  }

  .about-pains__card--focus .tag {
    grid-column: 1;
  }

  .about-pains__card--focus h3 {
    grid-column: 1;
    font-size: 1.5rem;
  }

  .about-pains__card--focus p {
    grid-column: 2;
    grid-row: 1 / span 3;
    align-self: center;
    font-size: 15px;
  }

  .about-pains__card--focus .about-pains__link {
    grid-column: 1;
  }

  .about-method__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .about-method__media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .about-track__rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    align-items: start;
  }

  .about-track__rail::before {
    content: "";
    position: absolute;
    top: 24px;
    left: 12px;
    right: 12px;
    height: 2px;
    background: linear-gradient(90deg, var(--cyan), var(--teal) 60%, var(--orange));
    opacity: 0.55;
  }

  .about-track__item {
    background: transparent;
    border: 0;
    border-radius: 0;
    overflow: visible;
    padding-right: 16px;
  }

  .about-track__item[open] {
    border-color: transparent;
  }

  .about-track__item summary {
    grid-template-columns: 16px minmax(0, 1fr);
    padding: 12px 0 14px;
  }

  .about-track__item[open] summary {
    background: rgba(53, 242, 196, 0.06);
    border-radius: 10px;
    padding-left: 12px;
    margin-left: -12px;
  }

  .about-track__panel {
    padding: 0 12px 0 0;
  }

  .about-track__panel p {
    font-size: 13px;
  }

  .about-track__media {
    max-width: 340px;
    margin-top: 36px;
    margin-left: auto;
  }

  .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .about-team__count {
    grid-column: 1;
    grid-row: 1 / span 4;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding: 32px 28px;
  }

  .about-eco__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .about-reach__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: stretch;
  }

  .about-reach__map {
    min-height: 360px;
  }
}

@media (min-width: 1200px) {
  .about-hero h1 {
    font-size: clamp(3rem, 4.6vw, 4.6rem);
  }

  .about-track__media {
    max-width: 380px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}