.page-about {
  --about-card: rgba(11, 59, 60, .55);
  --about-card-deep: rgba(7, 26, 28, .68);
  --about-card-hover: rgba(11, 59, 60, .92);
  position: relative;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(44px, 8vw, 104px) 0 clamp(36px, 6vw, 72px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -180px;
  width: min(700px, 82vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 40% 40%, rgba(31, 107, 255, .28), rgba(31, 107, 255, 0) 66%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -140px;
  bottom: -200px;
  width: 460px;
  height: 460px;
  background: linear-gradient(155deg, rgba(94, 125, 90, .45), rgba(242, 169, 59, .10));
  clip-path: polygon(0 0, 100% 32%, 76% 100%, 0 84%);
  opacity: .55;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-hero__text {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-hero__eyebrow {
  color: var(--moss-light);
  margin: 0;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 6.4vw, 74px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--paper);
}

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

.page-about .about-hero__lead {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--cool);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--about-card-deep);
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__media::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--moss), var(--amber));
  z-index: 2;
}

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

.page-about .about-hero__media .img-cap {
  display: block;
  padding: 10px 16px;
  font-size: 12px;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--cool);
  background: rgba(7, 26, 28, .88);
  border-top: 1px solid var(--line);
}

/* ---------- 数字条 ---------- */

.page-about .about-figures {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: clamp(30px, 4.5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-figures__item {
  background: linear-gradient(180deg, rgba(11, 59, 60, .72), rgba(7, 26, 28, .78));
  padding: clamp(16px, 2.4vw, 26px);
  display: grid;
  gap: 8px;
  align-content: start;
  transition: background .22s var(--ease);
}

.page-about .about-figures__item:hover {
  background: var(--about-card-hover);
}

.page-about .about-figures__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--blue-soft);
}

.page-about .about-figures__unit {
  font-size: .42em;
  letter-spacing: .1em;
  color: var(--amber);
  margin-left: 4px;
}

.page-about .about-figures__label {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cool);
  line-height: 1.6;
}

/* ---------- 章节跳转 ---------- */

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(26px, 3.6vw, 42px);
  padding-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line);
}

.page-about .about-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-size: 13px;
  color: var(--cool);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--white);
  border-color: var(--blue);
  background: rgba(31, 107, 255, .14);
}

.page-about .about-jump__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--moss-light);
}

/* ---------- 通用章节头 ---------- */

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

.page-about .about-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-head__title {
  margin: 0;
  font-weight: 300;
  letter-spacing: -.01em;
}

.page-about .about-head__lead {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--cool);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .about-tl {
  display: grid;
  gap: 10px;
}

.page-about .about-tl__era {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--stone-2);
}

.page-about .about-tl__era::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--moss);
  background: var(--ink);
}

.page-about .about-tl:nth-child(2n) .about-tl__era::before {
  border-color: var(--stone-2);
}

.page-about .about-tl__card {
  position: relative;
  padding: clamp(18px, 2.6vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(11, 59, 60, .74), rgba(7, 26, 28, .64));
  transition: border-color .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .about-tl__card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 20px;
  bottom: 20px;
  width: 3px;
  border-radius: 3px;
  background: var(--moss);
  transition: background .22s var(--ease);
}

.page-about .about-tl:nth-child(2n) .about-tl__card::before {
  background: var(--stone);
}

.page-about .about-tl:hover .about-tl__card {
  border-color: var(--line-2);
  transform: translateX(4px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-tl:hover .about-tl__card::before {
  background: var(--amber);
}

.page-about .about-tl__title {
  margin: 0 0 10px;
  font-weight: 400;
  letter-spacing: -.01em;
}

.page-about .about-tl__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cool);
}

.page-about .about-tl__meta {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-tl__meta li {
  padding: 4px 12px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--cool);
}

/* ---------- 内容组织 ---------- */

.page-about .about-ledger {
  display: grid;
  gap: clamp(22px, 3.4vw, 46px);
}

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

.page-about .about-ledger__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(42px, 8vw, 78px);
  line-height: .9;
  letter-spacing: -.04em;
  color: rgba(94, 125, 90, .55);
}

.page-about .about-ledger__rail .h2 {
  margin: 0;
  font-weight: 300;
  letter-spacing: -.01em;
}

.page-about .about-ledger__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--stone-2);
  max-width: 34ch;
}

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

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

.page-about .about-row {
  display: grid;
  gap: 8px;
  padding: clamp(16px, 2.4vw, 24px) 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left .22s var(--ease), background .22s var(--ease);
}

.page-about .about-row:hover {
  padding-left: 12px;
  background: linear-gradient(90deg, rgba(31, 107, 255, .09), rgba(31, 107, 255, 0) 72%);
}

.page-about .about-row__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--moss-light);
}

.page-about .about-row__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cool);
}

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

/* ---------- 团队与节奏 ---------- */

.page-about .about-team {
  display: grid;
  gap: clamp(28px, 4.4vw, 54px);
}

.page-about .about-team__intro {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-team__title {
  margin: 0;
  font-weight: 300;
  letter-spacing: -.01em;
}

.page-about .about-team__text {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cool);
}

.page-about .about-team__media {
  margin: 8px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--about-card-deep);
}

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

.page-about .about-team__media .img-cap {
  display: block;
  padding: 10px 16px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--cool);
  border-top: 1px solid var(--line);
  background: rgba(7, 26, 28, .88);
}

.page-about .about-team__side {
  display: grid;
  gap: clamp(18px, 2.6vw, 26px);
  align-content: start;
}

.page-about .about-roster {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-roster li {
  background: var(--about-card-deep);
  padding: clamp(14px, 2vw, 22px);
  display: grid;
  gap: 8px;
  align-content: start;
  transition: background .22s var(--ease);
}

.page-about .about-roster li:hover {
  background: var(--about-card-hover);
}

.page-about .about-roster__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -.02em;
}

.page-about .about-roster__label {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--cool);
}

.page-about .about-clock {
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--about-card);
}

.page-about .about-clock__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--moss-light);
}

.page-about .about-clock ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-clock li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--cool);
}

.page-about .about-clock li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-clock li .mono {
  color: var(--blue-soft);
  font-size: 12.5px;
  letter-spacing: .06em;
  min-width: 88px;
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  display: grid;
  gap: clamp(28px, 4.2vw, 50px);
}

.page-about .about-eco__net {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  align-content: start;
  min-width: 0;
}

.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-partner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px 16px;
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2.4vw, 24px);
  background: var(--about-card-deep);
  transition: background .22s var(--ease);
}

.page-about .about-partner:hover {
  background: rgba(31, 107, 255, .13);
}

.page-about .about-partner__name {
  font-size: 15px;
  color: var(--paper);
}

.page-about .about-partner__num {
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--blue-soft);
}

.page-about .about-creds {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-creds li {
  padding: 8px 16px;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--paper);
  background: rgba(94, 125, 90, .16);
  transition: border-color .2s var(--ease), transform .2s var(--ease), background .2s var(--ease);
}

.page-about .about-creds li:hover {
  border-color: var(--moss-light);
  background: rgba(94, 125, 90, .28);
  transform: translateY(-2px);
}

.page-about .about-eco__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--about-card-deep);
}

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

.page-about .about-eco__media .img-cap {
  display: block;
  padding: 10px 16px;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--cool);
  border-top: 1px solid var(--line);
  background: rgba(7, 26, 28, .88);
}

/* ---------- 适用场景 ---------- */

.page-about .about-scenes {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-scene {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(20px, 2.8vw, 32px);
  background: var(--about-card);
  transition: background .22s var(--ease);
}

.page-about .about-scene:hover {
  background: var(--about-card-hover);
}

.page-about .about-scene__title {
  margin: 0;
  font-weight: 400;
  letter-spacing: -.01em;
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--cool);
}

.page-about .about-scene__link {
  justify-self: start;
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-scene__link:hover,
.page-about .about-scene__link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--amber);
}

/* ---------- 收尾 ---------- */

.page-about .about-block--cta {
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-cta {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(31, 107, 255, .18), rgba(94, 125, 90, .14) 55%, rgba(242, 169, 59, .10));
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-weight: 300;
  letter-spacing: -.01em;
}

.page-about .about-cta__text p,
.page-about .about-cta__text {
  margin: 0;
}

.page-about .about-cta__text p {
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cool);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: center;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-about .about-hero__title br {
    display: inline;
  }
}

@media (min-width: 720px) {
  .page-about .about-row {
    grid-template-columns: minmax(0, 140px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-row__k {
    padding-top: 3px;
  }

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

@media (min-width: 880px) {
  .page-about .about-tl {
    grid-template-columns: 156px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
    align-items: start;
  }

  .page-about .about-tl__era {
    padding-top: 8px;
    justify-content: flex-start;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: end;
    gap: clamp(36px, 6vw, 76px);
  }

  .page-about .about-ledger {
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__card,
  .page-about .about-row,
  .page-about .about-scene,
  .page-about .about-figures__item,
  .page-about .about-creds li,
  .page-about .about-jump__link {
    transition: none;
  }

  .page-about .about-tl:hover .about-tl__card,
  .page-about .about-creds li:hover {
    transform: none;
  }
}