.page-about {
  --about-cut: 20px;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(18px, 3vw, 34px) clamp(44px, 7vw, 96px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 34px);
}

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

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 6.6vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 54ch;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding-top: clamp(16px, 2.4vw, 24px);
  border-top: 1px solid var(--line);
}

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

.page-about .about-fact__key {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-fact__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-hero__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--lime);
}

/* ---------- 年表 ---------- */
.page-about .about-timeline {
  border-top: 1px solid var(--line);
}

.page-about .about-timeline__eyebrow,
.page-about .about-system__eyebrow,
.page-about .about-scale__eyebrow,
.page-about .about-team__eyebrow {
  margin: 0;
}

.page-about .about-timeline__title,
.page-about .about-system__title,
.page-about .about-scale__title,
.page-about .about-team__title {
  margin: 12px 0 0;
  color: var(--white);
}

.page-about .about-timeline__lede,
.page-about .about-system__lede,
.page-about .about-team__lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 60ch;
  color: var(--muted);
}

.page-about .about-timeline__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-timeline__navlink {
  display: inline-block;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--lime);
  border: 1px solid var(--line);
  background: var(--panel-2);
  transition: border-color .3s var(--ease-out), background .3s var(--ease-out), color .3s var(--ease-out);
}

.page-about .about-timeline__navlink:hover,
.page-about .about-timeline__navlink:focus-visible {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.page-about .about-milestones {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(8px, 1.4vw, 16px);
}

.page-about .about-milestone {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-block: clamp(20px, 3.4vw, 32px);
  border-top: 1px solid var(--line);
}

.page-about .about-milestone__year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(46px, 12vw, 64px);
  line-height: 0.84;
  letter-spacing: -0.04em;
  color: var(--lime);
}

.page-about .about-milestone:nth-child(even) .about-milestone__year {
  color: var(--lime-soft);
}

.page-about .about-milestone__body {
  min-width: 0;
}

.page-about .about-milestone__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.28;
  color: var(--white);
}

.page-about .about-milestone__body p {
  margin: 10px 0 0;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- 内容体系 ---------- */
.page-about .about-system__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-system__card {
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: transform .35s var(--ease-out), background .35s var(--ease-out), border-color .35s var(--ease-out);
}

.page-about .about-system__card:hover,
.page-about .about-system__card:focus-within {
  transform: translateY(-5px);
  background: var(--panel-2);
  border-color: var(--lime);
}

.page-about .about-system__tag {
  display: inline-block;
}

.page-about .about-system__cardtitle {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
  color: var(--white);
}

.page-about .about-system__text {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 15px;
}

.page-about .about-system__link {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--lime);
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
  transition: border-color .3s var(--ease-out), color .3s var(--ease-out);
}

.page-about .about-system__link:hover,
.page-about .about-system__link:focus-visible {
  border-color: var(--lime);
  color: var(--lime-soft);
}

.page-about .about-system__figure {
  margin: clamp(26px, 4vw, 44px) 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-system__img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-system__cap {
  display: block;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 覆盖能力 ---------- */
.page-about .about-scale__panel {
  padding: clamp(24px, 4.4vw, 52px);
  background: linear-gradient(150deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--line);
}

.page-about .about-scale__title {
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.16;
}

.page-about .about-scale__list {
  list-style: none;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 2.8vw, 30px);
}

.page-about .about-scale__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

.page-about .about-scale__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 48px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .about-scale__label {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-scale__bar {
  height: 6px;
  margin-top: clamp(24px, 3.4vw, 38px);
  background: linear-gradient(90deg, var(--lime) 0%, var(--lime-soft) 42%, var(--orange) 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
}

.page-about .about-team__roles {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-team__roles li {
  padding-left: 16px;
  border-left: 2px solid var(--lime);
  color: var(--muted);
  line-height: 1.75;
  font-size: 15px;
}

.page-about .about-team__roles strong {
  color: var(--white);
  margin-right: 6px;
}

.page-about .about-team__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team__cap {
  display: block;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 长期协作 ---------- */
.page-about .about-trust {
  background: var(--paper);
  color: var(--paper-ink);
  padding-block: clamp(42px, 7vw, 90px);
}

.page-about .about-trust__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--paper-ink);
  opacity: .62;
}

.page-about .about-trust__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper-ink);
}

.page-about .about-trust__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-trust__card {
  padding: clamp(20px, 2.8vw, 30px);
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(27, 21, 16, .14);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-trust__cardtitle {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.35;
  color: var(--paper-ink);
}

.page-about .about-trust__card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(27, 21, 16, .78);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta__panel {
  padding: clamp(26px, 5vw, 54px);
  background: linear-gradient(140deg, var(--panel) 0%, var(--panel-2) 100%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.2vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 14px 0 0;
  max-width: 58ch;
  color: var(--muted);
  line-height: 1.78;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 响应式 ---------- */
@media (max-width: 639px) {
  .page-about .about-milestones {
    display: flex;
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 14px;
    -webkit-overflow-scrolling: touch;
  }

  .page-about .about-milestone {
    flex: 0 0 82%;
    scroll-snap-align: start;
    border-top: none;
    border-left: 2px solid var(--line);
    padding-left: 16px;
    padding-block: 4px 4px;
  }

  .page-about .about-milestone__year {
    font-size: clamp(40px, 14vw, 56px);
  }
}

@media (min-width: 760px) {
  .page-about .about-system__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-system__card:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-system__card:nth-child(3) {
    margin-top: 52px;
  }

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

@media (min-width: 860px) {
  .page-about .about-scale__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
  }

  .page-about .about-milestone {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-milestone__year {
    font-size: clamp(64px, 7.4vw, 104px);
    position: sticky;
    top: 96px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__figure {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }

  .page-about .about-milestone__year {
    position: static;
  }
}