.page-about {
  --about-rail: clamp(86px, 11vw, 136px);
  --about-hair: 1px;
  background: var(--abyss);
  color: var(--paper);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: hidden;
}

.page-about .sec-title {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: clamp(1.45rem, 4.4vw, 2.5rem);
  line-height: 1.25;
  margin: 10px 0 18px;
  color: var(--paper);
}

.page-about .sec-note {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 56ch;
  margin: 0 0 clamp(28px, 4vw, 48px);
}

.page-about .prose {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 240, 232, 0.82);
  margin: 0 0 18px;
  max-width: 62ch;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 44px) 0 clamp(48px, 7vw, 96px);
  background:
    radial-gradient(circle at 82% 12%, rgba(200, 138, 61, 0.16), transparent 46%),
    linear-gradient(180deg, var(--abyss), var(--deep) 140%);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0.05em;
  font-size: clamp(1.75rem, 6.4vw, 3.4rem);
  line-height: 1.2;
  margin: 12px 0 20px;
  color: var(--paper);
}

.page-about .about-hero__title br {
  display: none;
}

.page-about .about-hero__lede {
  font-size: 15px;
  line-height: 1.9;
  color: rgba(244, 240, 232, 0.8);
  max-width: 54ch;
  margin: 0 0 clamp(24px, 4vw, 36px);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 20px 0 0;
  border-top: var(--about-hair) solid var(--line);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-hero__v {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4.6vw, 1.9rem);
  font-weight: 700;
  color: var(--gold-lt);
  letter-spacing: 0.02em;
  line-height: 1;
}

.page-about .about-hero__k {
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  letter-spacing: 0.03em;
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  border: var(--about-hair) solid var(--line);
  background: var(--glass);
  padding: 10px;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 5 / 7;
}

.page-about .about-hero__figure figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
  padding: 10px 2px 2px;
}

/* ---------- 宣言 ---------- */
.page-about .manifesto {
  padding: clamp(44px, 6.5vw, 88px) 0;
  border-top: var(--about-hair) solid var(--line-soft);
}

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

.page-about .manifesto__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--gold);
  border: var(--about-hair) solid var(--accent-line);
  padding: 5px 10px;
  display: inline-block;
  border-radius: 2px;
}

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

/* ---------- 数据整理方法 ---------- */
.page-about .method {
  padding: clamp(44px, 6.5vw, 88px) 0;
  background: linear-gradient(180deg, transparent, rgba(13, 42, 66, 0.55) 22%, transparent);
}

.page-about .method__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 44px);
}

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

.page-about .method__step {
  position: relative;
  padding: 20px 18px 20px 20px;
  background: var(--glass);
  border: var(--about-hair) solid var(--line);
  border-left: 2px solid var(--gold);
  border-radius: 2px;
}

.page-about .method__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
  display: block;
  margin-bottom: 8px;
}

.page-about .method__h {
  font-family: var(--font-head);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: var(--paper);
  margin: 0 0 8px;
  font-weight: 700;
}

.page-about .method__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 240, 232, 0.72);
}

.page-about .method__figure {
  margin: 0;
  border: var(--about-hair) solid var(--line);
  background: var(--glass);
  padding: 10px;
}

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

.page-about .method__figure figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
  padding: 10px 2px 2px;
}

.page-about .method__verify {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 30px);
  border: var(--about-hair) solid var(--accent-line);
  background: var(--accent-wash);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.page-about .method__verify-copy p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 240, 232, 0.78);
  max-width: 60ch;
}

.page-about .method__verify .btn {
  justify-self: start;
}

/* ---------- 团队 ---------- */
.page-about .team {
  padding: clamp(44px, 6.5vw, 88px) 0;
  border-top: var(--about-hair) solid var(--line-soft);
}

.page-about .team__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

.page-about .team__figure {
  margin: 0;
  border: var(--about-hair) solid var(--line);
  background: var(--glass);
  padding: 10px;
}

.page-about .team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .team__figure figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
  padding: 10px 2px 2px;
}

.page-about .team__cards {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .team__card {
  border: var(--about-hair) solid var(--line);
  background: rgba(7, 27, 44, 0.7);
  border-radius: 2px;
  transition: border-color 0.2s linear;
}

.page-about .team__card[open] {
  border-color: var(--accent-line);
}

.page-about .team__summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .team__summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -3px;
  background: rgba(200, 138, 61, 0.12);
}

.page-about .team__num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--gold-lt);
  line-height: 1;
  min-width: 42px;
}

.page-about .team__role {
  font-family: var(--font-head);
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--paper);
}

.page-about .team__card p {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 240, 232, 0.72);
}

/* ---------- 时间轴 ---------- */
.page-about .history {
  padding: clamp(44px, 6.5vw, 88px) 0;
  background: linear-gradient(180deg, transparent, rgba(13, 42, 66, 0.4) 30%, transparent);
}

.page-about .tl {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 0 0 clamp(28px, 4vw, 40px) 22px;
  border-left: 1px solid var(--line);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 138, 61, 0.14);
}

.page-about .tl__rail {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 6vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-lt);
  line-height: 1;
}

.page-about .tl__coord {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
  border: var(--about-hair) solid var(--line);
  padding: 3px 7px;
  border-radius: 2px;
}

.page-about .tl__h {
  font-family: var(--font-head);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: var(--paper);
  margin: 0 0 8px;
  font-weight: 700;
}

.page-about .tl__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 240, 232, 0.74);
  max-width: 58ch;
}

/* ---------- 更新节拍 ---------- */
.page-about .cadence {
  padding: clamp(44px, 6.5vw, 88px) 0;
  border-top: var(--about-hair) solid var(--line-soft);
}

.page-about .cadence__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

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

.page-about .cadence__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 20px 0;
  border-top: var(--about-hair) solid var(--line-soft);
}

.page-about .cadence__row:last-child {
  border-bottom: var(--about-hair) solid var(--line-soft);
}

.page-about .cadence__cycle {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--coral);
  white-space: nowrap;
}

.page-about .cadence__desc h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--paper);
  margin: 0 0 6px;
  font-weight: 700;
}

.page-about .cadence__desc p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 240, 232, 0.7);
}

/* ---------- 合作生态 ---------- */
.page-about .eco {
  padding: clamp(44px, 6.5vw, 88px) 0;
  background: linear-gradient(180deg, transparent, rgba(13, 42, 66, 0.5));
}

.page-about .eco__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .eco__diagram {
  border: var(--about-hair) solid var(--line);
  background: var(--glass);
  padding: 12px;
}

.page-about .eco__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-about .eco__hub {
  fill: rgba(200, 138, 61, 0.16);
  stroke: var(--gold);
  stroke-width: 1.5;
}

.page-about .eco__hub-text {
  fill: var(--paper);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
}

.page-about .eco__node {
  fill: var(--gold);
  stroke: transparent;
  stroke-width: 2;
  transition: fill 0.2s linear, stroke 0.2s linear;
  cursor: pointer;
}

.page-about .eco__node--alt {
  fill: var(--mint);
}

.page-about .eco__node:hover,
.page-about .eco__node:focus {
  fill: var(--gold-lt);
  stroke: var(--paper);
}

.page-about .eco__node--alt:hover,
.page-about .eco__node--alt:focus {
  fill: var(--mint);
  stroke: var(--paper);
}

.page-about .eco__legend {
  list-style: none;
  margin: 14px 0 0;
  padding: 12px 2px 2px;
  border-top: var(--about-hair) solid var(--line-soft);
  display: grid;
  gap: 8px;
}

.page-about .eco__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .eco__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.page-about .eco__dot--gold {
  background: var(--gold);
}

.page-about .eco__dot--mint {
  background: var(--mint);
}

.page-about .eco__stats {
  display: grid;
  gap: 18px;
}

.page-about .eco__stat {
  border-left: 2px solid var(--gold);
  padding-left: 16px;
  display: grid;
  gap: 6px;
}

.page-about .eco__stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 5.4vw, 2.4rem);
  font-weight: 700;
  color: var(--paper);
  line-height: 1;
  letter-spacing: 0.02em;
}

.page-about .eco__stat-label {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .eco__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 240, 232, 0.74);
}

.page-about .eco__stats .btn {
  justify-self: start;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(36px, 5vw, 60px) 0 0;
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: clamp(24px, 4vw, 40px);
  border: var(--about-hair) solid var(--accent-line);
  background: var(--accent-wash);
}

.page-about .about-cta__title {
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 4vw, 1.7rem);
  letter-spacing: 0.06em;
  color: var(--paper);
  margin: 0 0 10px;
  font-weight: 700;
}

.page-about .about-cta__inner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 240, 232, 0.76);
  max-width: 58ch;
}

.page-about .about-cta .btn {
  justify-self: start;
}

/* ---------- 显现 ---------- */
.page-about [data-reveal] {
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal] {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.45s linear, transform 0.45s ease-out;
  }
  .page-about [data-reveal].is-visible {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__title br {
    display: inline;
  }

  .page-about .manifesto__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
  }

  .page-about .method__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .method__verify {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }

  .page-about .method__verify .btn {
    justify-self: end;
  }

  .page-about .team__layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: start;
  }

  .page-about .cadence__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-about .cadence__row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .eco__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

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

  .page-about .about-cta .btn {
    justify-self: end;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero {
    padding-top: clamp(32px, 4vw, 56px);
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-hero__figure {
    margin-top: clamp(24px, 4vw, 56px);
  }

  .page-about .about-hero__figure img {
    aspect-ratio: 5 / 7;
  }

  .page-about .tl__item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
    padding-left: 0;
    border-left: 0;
    padding-bottom: clamp(32px, 4vw, 48px);
  }

  .page-about .tl {
    position: relative;
  }

  .page-about .tl::before {
    content: "";
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: calc(var(--about-rail) - 1px);
    width: 1px;
    background: var(--line);
  }

  .page-about .tl__rail {
    justify-content: flex-end;
    padding-right: 22px;
    text-align: right;
  }

  .page-about .tl__item::before {
    left: calc(var(--about-rail) - 5px);
    top: 10px;
  }

  .page-about .tl__body {
    padding-top: 2px;
  }
}
<<<END>>>