.page-about {
  --about-step: clamp(3.75rem, 9vw, 7rem);
  --about-gap: clamp(1.25rem, 4vw, 2.5rem);
  color: var(--paper);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 首屏 ---------- */

.page-about .about-mast {
  position: relative;
  padding-block: clamp(1.75rem, 6vw, 4rem);
  background:
    radial-gradient(120% 85% at 6% 0%, rgba(18, 48, 37, 0.95), rgba(11, 15, 13, 0) 62%),
    linear-gradient(180deg, rgba(27, 59, 46, 0.42), rgba(11, 15, 13, 0) 72%);
}

.page-about .about-mast__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

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

.page-about .about-mast__eyebrow {
  display: block;
  color: var(--lime);
  margin: 0 0 0.85rem;
}

.page-about .about-mast h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.95rem, 7.2vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--paper);
  max-width: 22ch;
  margin: 0 0 1.1rem;
}

.page-about .about-mast__lede {
  color: var(--muted);
  font-size: clamp(0.98rem, 2.6vw, 1.08rem);
  line-height: 1.85;
  max-width: 34rem;
  margin: 0 0 clamp(1.75rem, 4vw, 2.5rem);
}

.page-about .about-mast__stats {
  list-style: none;
  margin: 0;
  padding: 1.4rem 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem 1rem;
  max-width: 42rem;
}

.page-about .about-mast__stats li {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .about-mast__stats .num {
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 5vw, 2.05rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .about-mast__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--turf-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-mast__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.06) brightness(0.9);
}

.page-about .about-mast__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.5rem 0.8rem;
  background: rgba(11, 15, 13, 0.86);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 通用区块 ---------- */

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

.page-about .about-head {
  max-width: 46rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-idx {
  display: block;
  color: var(--lime);
  margin-bottom: 0.7rem;
}

.page-about .about-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.6vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin: 0 0 0.8rem;
}

.page-about .about-head p {
  color: var(--muted);
  line-height: 1.85;
  font-size: 0.96rem;
  max-width: 34rem;
  margin: 0;
}

/* ---------- 01 能力卡片 ---------- */

.page-about .about-caps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .about-cap {
  display: flex;
  flex-direction: column;
  padding: clamp(1.2rem, 3.4vw, 1.7rem);
  background: linear-gradient(158deg, var(--turf-700), var(--turf-600));
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--bevel)), calc(100% - var(--bevel)) 100%, 0 100%);
}

.page-about .about-cap__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .about-cap h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.08rem, 3vw, 1.2rem);
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0.6rem 0 0.6rem;
}

.page-about .about-cap p {
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.8;
  margin: 0 0 0.9rem;
}

.page-about .about-cap__meta {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.07em;
  color: var(--gold);
}

/* ---------- 02 规模 ---------- */

.page-about .about-scale {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 1.25rem;
}

.page-about .about-scale__item::before {
  content: "";
  display: block;
  width: 26px;
  height: 3px;
  background: var(--lime);
  margin-bottom: 0.85rem;
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.85rem, 7vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-scale__unit {
  font-size: 0.52em;
  color: var(--lime);
  margin-left: 0.15em;
}

.page-about .about-scale__label {
  display: block;
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.08em;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-scale__note {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--turf-700);
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.85;
  max-width: 34rem;
}

/* ---------- 03 团队 ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--turf-800);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06) brightness(0.92);
}

.page-about .about-team__list {
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-team__item summary {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 1.05rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1rem, 2.8vw, 1.1rem);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.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(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--lime);
  transition: transform 200ms var(--ease);
}

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

.page-about .about-team__item summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .about-team__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  flex: none;
}

.page-about .about-team__body {
  padding: 0 0 1.4rem;
}

.page-about .about-team__body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.85;
  max-width: 34rem;
}

/* ---------- 04 版本 ---------- */

.page-about .about-versions {
  position: relative;
  border: 1px solid var(--line);
  background: var(--turf-800);
  overflow: hidden;
}

.page-about .about-versions__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.16;
  filter: saturate(0.6) contrast(1.1);
  pointer-events: none;
}

.page-about .about-versions__inner {
  position: relative;
  z-index: 1;
  padding: clamp(1.25rem, 4vw, 2.5rem);
}

.page-about .about-versions__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: clamp(1.25rem, 3.5vw, 2rem);
}

.page-about .tab.about-vtab {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(11, 15, 13, 0.6);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.06em;
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .tab.about-vtab:hover {
  color: var(--paper);
  border-color: var(--muted);
}

.page-about .tab.about-vtab[aria-selected="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .tab.about-vtab:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .tab-panel.about-vpanel[hidden] {
  display: none;
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0.25rem 0 0.25rem 1.5rem;
  border-left: 2px solid var(--line);
}

.page-about .about-tl li {
  position: relative;
  padding: 0.5rem 0;
  color: var(--paper);
  font-size: 0.94rem;
  line-height: 1.8;
  max-width: 38rem;
}

.page-about .about-tl li::before {
  content: "";
  position: absolute;
  left: calc(-1.5rem - 5px);
  top: 1.08rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
}

/* ---------- 05 场景 ---------- */

.page-about .about-scenes {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-scene {
  padding-top: 1rem;
  border-top: 2px solid var(--line);
}

.page-about .about-scene__tag {
  display: block;
  color: var(--lime);
  margin: 0 0 0.55rem;
}

.page-about .about-scene h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 3vw, 1.2rem);
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0 0 0.6rem;
}

.page-about .about-scene p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.85;
}

/* ---------- 06 长期价值 ---------- */

.page-about .about-reasons {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-reason {
  display: grid;
  gap: 0.5rem;
  padding: clamp(1.25rem, 3.5vw, 1.9rem) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-reason__no {
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.1em;
  color: var(--lime);
}

.page-about .about-reason h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 3vw, 1.28rem);
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0;
}

.page-about .about-reason p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.85;
  max-width: 34rem;
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  margin-top: clamp(2.5rem, 7vw, 4.5rem);
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--turf-700), var(--turf-800));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-cta__eyebrow {
  display: block;
  color: var(--lime);
  margin: 0 0 0.6rem;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.35rem, 4.2vw, 1.9rem);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--paper);
  margin: 0 0 0.7rem;
}

.page-about .about-cta__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.85;
  max-width: 34rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-scale {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-caps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .about-cap:nth-child(even) {
    transform: translateY(2rem);
  }

  .page-about .about-scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.75rem;
  }
}

@media (min-width: 860px) {
  .page-about .about-reason {
    grid-template-columns: 8rem minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: baseline;
    gap: 2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-mast__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: clamp(2.5rem, 6vw, 5rem);
    align-items: start;
  }

  .page-about .about-mast__figure img {
    aspect-ratio: 3 / 4;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-about .about-team__figure img {
    aspect-ratio: 4 / 5;
  }
}

@media (min-width: 1080px) {
  .page-about .about-scale {
    gap: 2.5rem;
  }
}
<<<END>>>