.page-about {
  --about-gap: clamp(24px, 4vw, 56px);
  --about-pad: clamp(52px, 7.5vw, 104px);
  background: var(--ink);
  color: var(--text);
  overflow-x: hidden;
}

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

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text);
  margin: 0;
}

.page-about .section__title {
  font-size: clamp(26px, 3.6vw, 44px);
}

.page-about .section__note {
  max-width: 46em;
}

.page-about .about-hero__cta .btn,
.page-about .about-next__cta .btn {
  text-decoration: none;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: clamp(20px, 3vw, 34px) 0 var(--about-pad);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(53, 240, 208, 0.09) 0%, transparent 58%),
    linear-gradient(180deg, var(--ink-3) 0%, var(--ink) 68%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(22px, 3vw, 40px);
}

.page-about .about-hero h1 {
  font-size: clamp(34px, 6.6vw, 78px);
  margin-top: 14px;
  text-wrap: balance;
}

.page-about .about-hero__text {
  margin: 22px 0 0;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.75;
  color: var(--text-soft);
  max-width: 34em;
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__board {
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--radius);
}

.page-about .about-hero__board .panel__value {
  font-family: var(--font-mono);
  font-size: clamp(38px, 5vw, 56px);
  color: var(--blade);
  line-height: 1.1;
  margin: 8px 0 0;
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-hero__meta li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-hero__meta span {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--blade);
}

/* ---------- 数字带 ---------- */

.page-about .stat-band {
  list-style: none;
  margin: clamp(34px, 5vw, 64px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .stat-band__item {
  background: var(--ink);
  padding: clamp(20px, 2.4vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 7px;
  transition: background var(--dur-s) var(--ease);
}

.page-about .stat-band__item:hover {
  background: var(--ink-2);
}

.page-about .stat-band__num {
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--blade);
}

.page-about .stat-band__num small {
  font-size: 0.4em;
  margin-left: 4px;
  color: var(--text-soft);
}

.page-about .stat-band__unit {
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .stat-band__cap {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 发展历程 ---------- */

.page-about .about-chron {
  padding: var(--about-pad) 0;
  background: var(--ink-2);
  border-top: 1px solid var(--line);
}

.page-about .about-chron__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(22px, 3vw, 36px);
}

.page-about .about-chron__visual {
  margin: 0 0 clamp(28px, 4vw, 44px);
}

.page-about .about-chron__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink);
}

.page-about .about-chron__frame img {
  width: 100%;
  opacity: 0.5;
}

.page-about .about-chron__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 17, 15, 0.1) 0%, rgba(6, 17, 15, 0.82) 100%);
  pointer-events: none;
}

.page-about .about-chron__visual figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .tl {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 24px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: var(--line);
}

.page-about .tl__item {
  position: relative;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .tl__item:first-child {
  padding-top: 8px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 30px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--blade-dim);
  transition: background var(--dur-h) var(--ease), box-shadow var(--dur-h) var(--ease), transform var(--dur-h) var(--ease);
}

.page-about .tl__item:first-child::before {
  top: 16px;
}

.page-about .tl__item:hover::before {
  background: var(--blade);
  box-shadow: 0 0 0 5px rgba(53, 240, 208, 0.16);
  transform: scale(1.1);
}

.page-about .tl__item:hover {
  border-bottom-color: var(--blade-dim);
}

.page-about .tl__tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--blade);
}

.page-about .tl__title {
  font-size: clamp(19px, 2.1vw, 24px);
}

.page-about .tl__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-soft);
  max-width: 42em;
}

.page-about .about-chron__axis {
  order: -1;
}

.page-about .about-axis__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 0;
}

.page-about .about-axis__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-axis__item {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--muted);
  border-bottom: 2px solid var(--line);
  transition: color var(--dur-h) var(--ease), border-color var(--dur-h) var(--ease), background var(--dur-h) var(--ease);
}

.page-about .about-axis__item small {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blade-dim);
}

/* ---------- 两端差异 ---------- */

.page-about .about-pair {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-pair__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-pair__text h2 {
  font-size: clamp(26px, 3.6vw, 44px);
  margin-top: 14px;
}

.page-about .about-pair__text p {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-soft);
  max-width: 40em;
}

.page-about .about-pair__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-pair__list li {
  background: var(--ink);
  padding: 16px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  transition: background var(--dur-s) var(--ease), box-shadow var(--dur-s) var(--ease);
}

.page-about .about-pair__list li:hover {
  background: var(--ink-2);
  box-shadow: inset 3px 0 0 0 var(--blade);
}

.page-about .about-pair__list strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
  font-weight: 700;
}

.page-about .about-pair__text .btn {
  margin-top: 28px;
  text-decoration: none;
}

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

.page-about .about-pair__media img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-about .about-pair__media figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: var(--about-pad) 0;
  background: var(--ink-2);
  border-top: 1px solid var(--line);
}

.page-about .about-team__grid {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__card {
  background: var(--ink);
  padding: clamp(22px, 3vw, 34px);
  transition: background var(--dur-s) var(--ease);
}

.page-about .about-team__card:hover {
  background: var(--ink-3);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--blade);
}

.page-about .about-team__card h3 {
  font-size: clamp(18px, 2vw, 22px);
  margin: 14px 0 0;
}

.page-about .about-team__card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .about-team__support {
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(22px, 3vw, 34px);
  border-radius: var(--radius);
  display: grid;
  gap: 18px;
}

.page-about .about-team__support .panel__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 38px);
  color: var(--blade);
  line-height: 1.2;
  margin: 6px 0 0;
}

.page-about .about-team__support-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
  max-width: 48em;
}

.page-about .about-team__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 15px;
  color: var(--blade);
  text-decoration: none;
  border-bottom: 1px solid var(--blade-dim);
  padding-bottom: 2px;
  transition: color var(--dur-h) var(--ease), border-color var(--dur-h) var(--ease);
}

.page-about .about-team__link:hover {
  color: var(--text);
  border-bottom-color: var(--blade);
}

/* ---------- 数据来源 ---------- */

.page-about .about-data {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-data__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-data__text h2 {
  font-size: clamp(26px, 3.6vw, 44px);
  margin-top: 14px;
}

.page-about .about-data__text > p {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-soft);
  max-width: 40em;
}

.page-about .about-data__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-data__facts li {
  padding: 16px 0 16px 18px;
  border-top: 1px solid var(--line);
  border-left: 2px solid var(--line);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  transition: border-left-color var(--dur-h) var(--ease), color var(--dur-h) var(--ease);
}

.page-about .about-data__facts li:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-data__facts li:hover {
  border-left-color: var(--blade);
  color: var(--text-soft);
}

.page-about .about-data__facts span {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--blade);
  margin-right: 8px;
}

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

.page-about .about-data__media img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-about .about-data__media figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 实色白板 ---------- */

.page-about .about-creed {
  padding: 0 0 var(--about-pad);
}

.page-about .about-creed__board {
  background: var(--board);
  color: var(--board-ink);
  border-radius: var(--radius);
  padding: clamp(28px, 5vw, 64px);
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-creed__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--board-accent);
}

.page-about .about-creed__head h2 {
  color: var(--board-ink);
  font-size: clamp(26px, 3.4vw, 42px);
  margin-top: 12px;
}

.page-about .creed-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: creed;
}

.page-about .creed-list__item {
  padding: 22px 0;
  border-top: 1px solid rgba(6, 17, 15, 0.16);
}

.page-about .creed-list__item:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-about .creed-list__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--board-flame);
}

.page-about .creed-list__item h3 {
  color: var(--board-ink);
  font-size: clamp(18px, 2vw, 23px);
  margin-top: 8px;
}

.page-about .creed-list__item p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--board-muted);
  max-width: 44em;
}

/* ---------- 收尾 ---------- */

.page-about .about-next {
  padding: 0 0 var(--about-pad);
}

.page-about .about-next__inner {
  border-top: 1px solid var(--line);
  padding-top: clamp(24px, 3.4vw, 40px);
  display: grid;
  gap: 22px;
}

.page-about .about-next__text {
  margin: 0;
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.7;
  color: var(--text);
  max-width: 40em;
}

.page-about .about-next__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .stat-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-team__support {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-pair__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-creed__board {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .about-next__cta {
    justify-content: flex-end;
  }
}

@media (min-width: 1000px) {
  .page-about .about-chron__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-about .about-chron__grid > .about-chron__axis {
    order: -1;
    position: sticky;
    top: 116px;
  }

  .page-about .about-axis__list {
    flex-direction: column;
    overflow-x: visible;
    margin-top: 16px;
    padding-bottom: 0;
  }

  .page-about .about-axis__item {
    justify-content: space-between;
    width: 100%;
    border-bottom: 0;
    border-left: 2px solid var(--line);
    padding: 11px 14px;
  }

  .page-about .about-chron__grid:has(.tl__item:nth-child(1):hover) .about-axis__item:nth-child(1),
  .page-about .about-chron__grid:has(.tl__item:nth-child(2):hover) .about-axis__item:nth-child(2),
  .page-about .about-chron__grid:has(.tl__item:nth-child(3):hover) .about-axis__item:nth-child(3),
  .page-about .about-chron__grid:has(.tl__item:nth-child(4):hover) .about-axis__item:nth-child(4),
  .page-about .about-chron__grid:has(.tl__item:nth-child(5):hover) .about-axis__item:nth-child(5) {
    border-left-color: var(--blade);
    color: var(--text);
    background: var(--glass);
  }

  .page-about .about-chron__grid:has(.tl__item:nth-child(1):hover) .about-axis__item:nth-child(1) small,
  .page-about .about-chron__grid:has(.tl__item:nth-child(2):hover) .about-axis__item:nth-child(2) small,
  .page-about .about-chron__grid:has(.tl__item:nth-child(3):hover) .about-axis__item:nth-child(3) small,
  .page-about .about-chron__grid:has(.tl__item:nth-child(4):hover) .about-axis__item:nth-child(4) small,
  .page-about .about-chron__grid:has(.tl__item:nth-child(5):hover) .about-axis__item:nth-child(5) small {
    color: var(--blade);
  }
}

@media (min-width: 1080px) {
  .page-about .stat-band {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}