.page-about {
  --about-rail: 7.5rem;
  --about-grid-line: rgba(36, 68, 60, .55);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: 1.4rem;
  padding: clamp(1.5rem, 4.4vw, 3.25rem);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(11, 42, 33, .96) 0%, rgba(6, 26, 20, .98) 58%, rgba(27, 31, 59, .94) 100%);
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: .55;
  -webkit-mask-image: radial-gradient(120% 95% at 92% 8%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 95% at 92% 8%, #000 0%, transparent 74%);
  pointer-events: none;
}

.page-about .about-hero__frame {
  position: absolute;
  inset: 10px;
  pointer-events: none;
  opacity: .6;
  background:
    linear-gradient(var(--cyan), var(--cyan)) left top / 20px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) left top / 1px 20px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right top / 20px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right top / 1px 20px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) left bottom / 20px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) left bottom / 1px 20px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right bottom / 20px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) right bottom / 1px 20px no-repeat;
}

.page-about .about-hero__title {
  margin: .7rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 6vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: -.012em;
  color: var(--ice);
  max-width: 24ch;
}

.page-about .about-hero__lede {
  margin-top: 1.1rem;
  max-width: 60ch;
  color: var(--ice-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.6rem;
}

/* ---------- 数字条 ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.4rem;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .about-metrics .stat {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem 1.1rem 1.15rem;
  background: var(--ink-900);
}

.page-about .about-metrics .stat__value {
  font-size: clamp(1.5rem, 4.2vw, 2.35rem);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  position: relative;
  margin-top: clamp(2.8rem, 7vw, 5.5rem);
}

.page-about .about-chapter .section-head {
  margin-bottom: 1.1rem;
}

.page-about .about-chapter__lede {
  max-width: 62ch;
  margin-bottom: 1.6rem;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 1.4rem;
  margin-top: 1.5rem;
}

.page-about .about-origin__big {
  margin: 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.15rem, 3.4vw, 1.55rem);
  line-height: 1.55;
  color: var(--ice);
}

.page-about .about-origin__body p {
  margin: 0 0 1rem;
  color: var(--ice-soft);
  line-height: 1.85;
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-origin__body a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__figure {
  margin: 0 0 1.8rem;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.9rem;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 2.3rem;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1.9rem - 5px);
  top: .55rem;
  width: 9px;
  height: 9px;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  letter-spacing: .07em;
  color: var(--cyan);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-20);
  line-height: 1.3;
  color: var(--ice);
}

.page-about .about-timeline__body p {
  margin: 0;
  color: var(--cool);
  line-height: 1.8;
}

/* ---------- 团队（靛紫分区） ---------- */
.page-about .about-chapter--indigo {
  padding: clamp(1.4rem, 4vw, 2.75rem);
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(27, 31, 59, .92) 0%, rgba(11, 42, 33, .94) 100%);
  box-shadow: inset 0 1px 0 rgba(73, 242, 208, .22);
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: .4rem;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-team__cell {
  padding: 1.15rem 1.15rem 1.35rem;
  background: rgba(6, 26, 20, .82);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 6vw, 3.3rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-team__cell h3 {
  margin: .5rem 0 .45rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-20);
  color: var(--ice);
}

.page-about .about-team__cell p {
  margin: 0;
  color: var(--cool);
  line-height: 1.8;
  font-size: var(--fs-14);
}

.page-about .about-check {
  margin-top: 1.5rem;
  padding: 1.15rem 1.2rem 1.3rem;
  border-left: 2px solid var(--sand);
  background: rgba(6, 26, 20, .5);
}

.page-about .about-check__title {
  margin: 0 0 .8rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-20);
  color: var(--ice);
}

.page-about .about-check__list {
  list-style: none;
  counter-reset: about-check;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .8rem;
}

.page-about .about-check__list li {
  counter-increment: about-check;
  position: relative;
  padding-left: 2.1rem;
  color: var(--cool);
  line-height: 1.8;
  font-size: var(--fs-14);
}

.page-about .about-check__list li::before {
  content: "0" counter(about-check);
  position: absolute;
  left: 0;
  top: .18rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--sand);
}

.page-about .about-check__list strong {
  color: var(--ice);
  font-weight: 600;
}

.page-about .about-team__figure {
  margin: 1.6rem 0 0;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  margin-top: 1.5rem;
  align-items: start;
  gap: 1.5rem;
}

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

.page-about .about-partners__text p {
  margin: 0 0 1rem;
  color: var(--ice-soft);
  line-height: 1.85;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: .7rem;
}

.page-about .about-partners__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .55rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid var(--line-soft);
  color: var(--cool);
  font-size: var(--fs-14);
  line-height: 1.7;
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 1.5rem;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .about-scale__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .35rem .5rem;
  padding: 1.2rem 1.2rem 1.35rem;
  background: var(--ink-800);
}

.page-about .about-scale__item--wine {
  background: linear-gradient(160deg, rgba(59, 23, 34, .92), rgba(11, 42, 33, .95));
}

.page-about .about-scale__num {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  line-height: .95;
  letter-spacing: -.03em;
  color: var(--ice);
}

.page-about .about-scale__item--wide .about-scale__num {
  color: var(--cyan);
}

.page-about .about-scale__unit {
  font-family: var(--font-mono);
  font-size: var(--fs-16);
  color: var(--sand);
  letter-spacing: .04em;
}

.page-about .about-scale__label {
  flex-basis: 100%;
  font-size: var(--fs-12);
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--cool);
}

.page-about .about-scale__note {
  margin: 1.3rem 0 0;
  max-width: 66ch;
  color: var(--ice-soft);
  line-height: 1.85;
  padding-left: 1rem;
  border-left: 1px solid var(--line-strong);
}

/* ---------- 行业认可 ---------- */
.page-about .about-recognition {
  display: grid;
  gap: 1.4rem;
  margin-top: 1.5rem;
}

.page-about .about-recognition__badge {
  padding: 1.2rem 1.25rem 1.35rem;
  background: linear-gradient(150deg, rgba(27, 31, 59, .95), rgba(6, 26, 20, .6));
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--orange);
}

.page-about .about-recognition__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 3rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .about-recognition__text {
  margin: .7rem 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-20);
  line-height: 1.45;
  color: var(--ice);
}

.page-about .about-recognition__body p {
  margin: 0 0 1rem;
  color: var(--ice-soft);
  line-height: 1.85;
}

.page-about .about-recognition__list {
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .75rem;
}

.page-about .about-recognition__list li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--cool);
  line-height: 1.8;
  font-size: var(--fs-14);
}

.page-about .about-recognition__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68rem;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-recognition__list strong {
  color: var(--ice);
  font-weight: 600;
}

.page-about .about-recognition__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-recognition__body a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 结尾通道 ---------- */
.page-about .about-cta {
  position: relative;
  margin-top: clamp(2.8rem, 7vw, 5.5rem);
  padding: clamp(1.5rem, 4.4vw, 3rem);
  border: 1px solid var(--line-strong);
  background: linear-gradient(140deg, rgba(11, 42, 33, .95), rgba(6, 26, 20, .98) 60%, rgba(59, 23, 34, .85));
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-cta__glow {
  position: absolute;
  inset: -40% -10% auto auto;
  width: 60%;
  height: 180%;
  z-index: -1;
  background: radial-gradient(closest-side, rgba(255, 122, 26, .18), transparent 72%);
  pointer-events: none;
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.6vw, 2.6rem);
  line-height: 1.15;
  color: var(--ice);
}

.page-about .about-cta__lede {
  margin: .8rem 0 0;
  max-width: 56ch;
  color: var(--ice-soft);
  line-height: 1.85;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.4rem;
}

.page-about .about-cta__contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem .8rem;
  margin-top: 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cta__contact-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-about .about-cta__contact-value {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--ice);
  word-break: break-all;
}

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

  .page-about .about-scale__item--wide {
    grid-column: span 2;
  }
}

@media (min-width: 760px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 2rem;
  }

  .page-about .about-recognition {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 2rem;
  }
}

@media (min-width: 880px) {
  .page-about .about-timeline {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    padding-bottom: 0;
  }

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

  .page-about .about-timeline__year {
    position: relative;
    margin-bottom: 0;
    padding: .1rem 1.35rem 0 0;
    text-align: right;
    border-right: 1px solid var(--line);
    font-size: var(--fs-20);
  }

  .page-about .about-timeline__year::after {
    content: "";
    position: absolute;
    right: -5px;
    top: .48rem;
    width: 9px;
    height: 9px;
    background: var(--ink-900);
    border: 1px solid var(--cyan);
    transform: rotate(45deg);
  }

  .page-about .about-timeline__body {
    padding: 0 0 2.6rem 1.9rem;
  }

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

  .page-about .about-team {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-team__cell:nth-child(1) {
    grid-column: span 5;
  }

  .page-about .about-team__cell:nth-child(2) {
    grid-column: span 7;
  }

  .page-about .about-team__cell:nth-child(3) {
    grid-column: span 7;
  }

  .page-about .about-team__cell:nth-child(4) {
    grid-column: span 5;
  }

  .page-about .about-check__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }

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

  .page-about .about-scale__item--wide {
    grid-column: span 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cta__glow {
    display: none;
  }
}
<<<END>>>