.page-about {
  --about-hair: 1px solid var(--edge);
  display: block;
  background: var(--bg);
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(36px, 5.5vw, 84px) clamp(38px, 5.5vw, 78px);
  border-bottom: var(--about-hair);
  background:
    radial-gradient(130% 100% at 92% -10%, rgba(63, 210, 199, .16), transparent 60%),
    linear-gradient(180deg, rgba(23, 36, 76, .78), rgba(5, 9, 18, 0) 82%);
}

.page-about .about-hero::after {
  content: "SINCE 2016";
  position: absolute;
  right: -.04em;
  bottom: -.08em;
  font-family: var(--font-mono);
  font-size: clamp(52px, 12vw, 150px);
  line-height: 1;
  letter-spacing: .06em;
  color: rgba(244, 240, 230, .05);
  white-space: nowrap;
  pointer-events: none;
}

.page-about .about-hero__title {
  margin: clamp(16px, 2.4vw, 28px) 0 0;
  font-family: var(--font-sans);
  font-size: clamp(32px, 5.4vw, 72px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: .04em;
  max-width: 15em;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  max-width: 62ch;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: var(--text-dim);
  position: relative;
  z-index: 1;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--edge);
  border: var(--about-hair);
  position: relative;
  z-index: 1;
}

.page-about .about-stat {
  background: var(--ink-950);
  padding: 16px 18px 18px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 28px);
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--flame-300);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-xs);
  letter-spacing: .06em;
  color: var(--text-dim);
}

.page-about .about-index {
  padding-block: 16px;
  border-bottom: var(--about-hair);
}

.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding-block: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .04em;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--flame-300);
  border-bottom-color: var(--flame-500);
}

.page-about .about-index__n {
  color: var(--flame-500);
}

.page-about .about-chapter {
  position: relative;
  padding-block: clamp(44px, 6.5vw, 96px);
  border-bottom: var(--about-hair);
  scroll-margin-top: 96px;
}

.page-about .about-chapter__head {
  display: grid;
  gap: 12px;
  max-width: 68ch;
  margin-bottom: clamp(24px, 3.6vw, 44px);
}

.page-about .about-chapter__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .18em;
  color: var(--flame-500);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: .03em;
  color: var(--ivory-100);
}

.page-about .about-chapter__lede {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-md);
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-prose p {
  max-width: 66ch;
  margin: 0 0 1.2em;
  font-size: var(--fs-base);
  line-height: 1.82;
  color: var(--text-dim);
}

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

.page-about .about-prose p:first-child {
  color: var(--text);
}

/* 时间线 */
.page-about .about-timeline {
  position: relative;
  border-top: var(--about-hair);
  margin-top: 4px;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .18;
  pointer-events: none;
}

.page-about .about-timeline__scroller {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 0;
  margin: 0;
  padding: 30px var(--pad-x) 26px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-tl__item {
  flex: 0 0 min(80vw, 320px);
  scroll-snap-align: start;
  position: relative;
  padding: 22px 22px 10px 0;
  margin-right: 22px;
  border-right: var(--about-hair);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 8px;
  height: 8px;
  border: 1px solid var(--flame-500);
  background: var(--ink-950);
  transform: rotate(45deg);
}

.page-about .about-tl__k {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: .14em;
  color: var(--chart-400);
}

.page-about .about-tl__h {
  margin: 0 0 10px;
  font-size: var(--fs-md);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .02em;
  color: var(--ivory-100);
}

.page-about .about-tl__p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--text-dim);
}

/* 原则章节：陶土撞色 */
.page-about .about-chapter--principle {
  background: var(--terra-500);
  border-bottom: 1px solid rgba(5, 9, 18, .28);
}

.page-about .about-chapter--principle .about-chapter__num {
  color: rgba(5, 9, 18, .72);
}

.page-about .about-chapter--principle .about-chapter__title {
  color: var(--ivory-100);
}

.page-about .about-chapter--principle .about-chapter__lede {
  color: rgba(244, 240, 230, .88);
}

.page-about .about-principles {
  display: grid;
  gap: 1px;
  background: rgba(5, 9, 18, .24);
  border: 1px solid rgba(5, 9, 18, .24);
}

.page-about .about-principle {
  background: var(--terra-500);
  background-image: linear-gradient(180deg, rgba(244, 240, 230, .09), rgba(244, 240, 230, 0) 62%);
  padding: 22px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-principle__num {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 26px;
  line-height: 1;
  color: rgba(5, 9, 18, .55);
}

.page-about .about-principle__title {
  margin: 0 0 4px;
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--ivory-100);
}

.page-about .about-principle__row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding-top: 10px;
  border-top: 1px solid rgba(244, 240, 230, .3);
}

.page-about .about-principle__k {
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: .1em;
  line-height: 1.9;
  color: rgba(5, 9, 18, .78);
}

.page-about .about-principle__row p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: rgba(244, 240, 230, .95);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-team__body p {
  max-width: 60ch;
  margin: 0 0 1.2em;
  font-size: var(--fs-base);
  line-height: 1.82;
  color: var(--text-dim);
}

.page-about .about-team__facts {
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  background: var(--edge);
  border: var(--about-hair);
}

.page-about .about-team__fact {
  background: var(--ink-950);
  padding: 12px 16px;
  display: grid;
  gap: 4px;
}

.page-about .about-team__fact dt {
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: .12em;
  color: var(--flame-500);
}

.page-about .about-team__fact dd {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--text);
}

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

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

.page-about .about-team__figure .figure__cap {
  border-left: 2px solid var(--chart-400);
  padding-left: 10px;
}

/* 生态 */
.page-about .about-eco {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-about .about-eco__map {
  display: flex;
  justify-content: center;
}

.page-about .eco-map {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
}

.page-about .eco-map__ring circle {
  fill: none;
  stroke: rgba(155, 163, 180, .3);
  stroke-width: 1;
}

.page-about .eco-map__ring circle:nth-child(2) {
  stroke-dasharray: 3 6;
}

.page-about .eco-map__hub circle {
  fill: var(--flame-500);
}

.page-about .eco-map__hub text {
  fill: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  text-anchor: middle;
}

.page-about .eco-map__node circle {
  fill: var(--chart-400);
  transition: fill .2s var(--ease), r .2s var(--ease);
}

.page-about .eco-map__node:hover circle {
  fill: var(--flame-300);
  r: 7;
}

.page-about .about-eco__stats {
  display: grid;
  gap: 1px;
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  list-style: none;
  background: var(--edge);
  border: var(--about-hair);
}

.page-about .about-eco__stats li {
  background: var(--ink-950);
  padding: 12px 16px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-eco__n {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  color: var(--chart-400);
  min-width: 3.4em;
}

.page-about .about-eco__t {
  font-size: var(--fs-sm);
  color: var(--text-dim);
}

.page-about .about-eco__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: eco;
  display: grid;
  gap: 16px;
}

.page-about .about-eco__steps li {
  counter-increment: eco;
  position: relative;
  padding-left: 34px;
}

.page-about .about-eco__steps li::before {
  content: counter(eco, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: .06em;
  color: var(--flame-300);
}

.page-about .about-eco__steps h3 {
  margin: 0 0 4px;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--ivory-100);
}

.page-about .about-eco__steps p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--text-dim);
  max-width: 54ch;
}

.page-about .about-eco__figure {
  margin-top: clamp(28px, 4vw, 48px);
  max-width: 520px;
}

.page-about .about-eco__figure .figure__cap {
  border-left: 2px solid var(--moss-500);
  padding-left: 10px;
}

/* 荣誉 */
.page-about .about-honor {
  display: grid;
  gap: 1px;
  background: rgba(231, 180, 92, .42);
  border: 1px solid rgba(231, 180, 92, .42);
}

.page-about .about-honor__item {
  background: var(--ink-950);
  padding: 22px 20px 24px;
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-honor__id {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: .16em;
  color: var(--gold-400);
}

.page-about .about-honor__title {
  margin: 0;
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: .02em;
  color: var(--ivory-100);
}

.page-about .about-honor__p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: var(--text-dim);
}

/* 结尾 */
.page-about .about-cta {
  background: var(--flame-500);
  color: var(--ink-950);
  padding-block: clamp(40px, 6vw, 84px);
}

.page-about .about-cta__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: .16em;
  color: rgba(5, 9, 18, .7);
}

.page-about .about-cta__title {
  margin: 14px 0 0;
  font-size: clamp(24px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: .03em;
  color: var(--ink-950);
  max-width: 18em;
}

.page-about .about-cta__lede {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: var(--fs-base);
  line-height: 1.78;
  color: rgba(5, 9, 18, .82);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-cta__link {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  border: 1px solid rgba(5, 9, 18, .55);
  font-size: var(--fs-sm);
  letter-spacing: .04em;
  color: var(--ink-950);
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  background: var(--ink-950);
  border-color: var(--ink-950);
  color: var(--ivory-100);
}

.page-about .about-cta__link--solid {
  background: var(--ink-950);
  border-color: var(--ink-950);
  color: var(--ivory-100);
  font-weight: 600;
}

.page-about .about-cta__link--solid:hover,
.page-about .about-cta__link--solid:focus-visible {
  background: var(--space-800);
  border-color: var(--space-800);
}

.page-about .about-cta__note {
  margin: 20px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: rgba(5, 9, 18, .78);
}

.page-about .about-cta__note a {
  color: var(--ink-950);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-cta__note a:hover,
.page-about .about-cta__note a:focus-visible {
  color: var(--space-800);
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 880px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 380px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-eco__map {
    position: sticky;
    top: 96px;
  }

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

  .page-about .about-eco__stats li {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-principles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-principle {
    padding: 26px 20px 28px;
  }

  .page-about .about-principle__row {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .eco-map__node circle,
  .page-about .about-cta__link {
    transition: none;
  }
}