.page-about {
  --about-pad: clamp(16px, 4vw, 40px);
  --about-gap: clamp(64px, 9vw, 112px);
  --about-plate: rgba(20, 53, 42, .8);
  color: var(--white);
  padding-bottom: clamp(72px, 10vw, 128px);
  font-family: var(--font-body);
}

.page-about .container {
  padding-inline: var(--about-pad);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: clamp(16px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}
.page-about .crumbs ol,
.page-about .crumbs ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .crumbs a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 169, 245, .35);
}
.page-about .crumbs a:hover {
  color: var(--blue-pale);
}
.page-about .crumbs [aria-current="page"] {
  color: var(--muted);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(28px, 5vw, 56px);
}
.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--blue-pale);
}
.page-about .about-hero__kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--signal);
}
.page-about .about-hero__grid {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  align-items: end;
}
.page-about .about-hero__mark {
  display: flex;
  flex-direction: column;
}
.page-about .about-hero__year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(68px, 15vw, 164px);
  font-weight: 700;
  line-height: .82;
  letter-spacing: -.05em;
  font-variant-numeric: tabular-nums;
  color: var(--signal-soft);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-about .about-hero__year {
    background: linear-gradient(155deg, var(--signal) 0%, var(--signal-soft) 44%, var(--blue-pale) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}
.page-about .about-hero__since {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--muted);
}
.page-about .about-hero__title {
  margin: 0;
  font-size: clamp(26px, 4.4vw, 50px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.025em;
  color: var(--white);
}
.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 34em;
  font-size: clamp(15.5px, 1.5vw, 18px);
  line-height: 1.9;
  color: rgba(243, 248, 245, .86);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.6vw, 36px);
}
.page-about .about-hero__actions .btn {
  min-width: 148px;
  justify-content: center;
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(190px, .42fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }
}

/* ---------- 数字带 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(34px, 5vw, 58px) 0 0;
  padding: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.page-about .about-stats__cell {
  background: linear-gradient(180deg, rgba(14, 36, 25, .94), rgba(8, 23, 15, .94));
  padding: clamp(16px, 2.2vw, 24px) clamp(14px, 2vw, 22px);
}
.page-about .about-stats dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}
.page-about .about-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--yellow);
}
.page-about .about-stats__unit {
  margin-left: 4px;
  font-family: var(--font-body);
  font-size: .46em;
  font-weight: 500;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  position: relative;
  margin-top: var(--about-gap);
}
.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: clamp(24px, 3.4vw, 40px);
}
.page-about .about-sec__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  color: rgba(31, 90, 66, .4);
  -webkit-text-stroke: 1px rgba(31, 90, 66, .95);
}
.page-about .about-sec__title {
  margin: 0;
  font-size: clamp(21px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--white);
}

/* ---------- 展签说明牌 ---------- */
.page-about .about-plate {
  position: relative;
  padding: clamp(20px, 2.4vw, 28px) clamp(18px, 2.4vw, 26px);
  padding-left: clamp(28px, 3.4vw, 38px);
  background: var(--about-plate);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
}
.page-about .about-plate::before {
  content: "";
  position: absolute;
  left: 12px;
  top: clamp(20px, 2.4vw, 28px);
  bottom: clamp(20px, 2.4vw, 28px);
  width: 3px;
  background: linear-gradient(180deg, var(--signal), rgba(255, 106, 46, 0));
}
.page-about .about-plate::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 16px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grid);
  box-shadow: 0 9px 0 var(--grid), 0 18px 0 var(--grid);
  opacity: .65;
}
.page-about .about-plate__idx {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--blue-pale);
}
.page-about .about-plate__text {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(243, 248, 245, .82);
}
.page-about .about-plate--wide {
  margin-top: clamp(20px, 3vw, 32px);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}
.page-about .about-origin__copy p {
  margin: 0 0 18px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(243, 248, 245, .85);
}
.page-about .about-origin__copy p:last-child {
  margin-bottom: 0;
}
@media (min-width: 900px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}

/* ---------- 02 三件事 ---------- */
.page-about .about-trio {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.2vw, 24px);
}
@media (min-width: 780px) {
  .page-about .about-trio {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-trio__card {
  position: relative;
  padding: 26px 22px 28px;
  background: linear-gradient(170deg, rgba(20, 53, 42, .94), rgba(14, 36, 25, .78));
  border: 1px solid var(--line-soft);
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.page-about .about-trio__card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--signal), rgba(255, 106, 46, 0));
}
.page-about .about-trio__card:hover {
  transform: translateY(-4px);
  border-color: var(--grid);
  box-shadow: var(--shadow-card);
}
.page-about .about-trio__idx {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue-pale);
}
.page-about .about-trio__card h3 {
  margin: 0 0 10px;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}
.page-about .about-trio__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(243, 248, 245, .78);
}

/* ---------- 渐变节奏带 ---------- */
.page-about .about-band {
  height: 2px;
  max-width: 1200px;
  margin: clamp(48px, 8vw, 96px) auto;
  background: linear-gradient(90deg, rgba(255, 106, 46, 0) 0%, rgba(255, 106, 46, .85) 22%, rgba(63, 169, 245, .85) 78%, rgba(63, 169, 245, 0) 100%);
  opacity: .8;
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}
.page-about .about-split__copy p {
  margin: 0 0 16px;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(243, 248, 245, .84);
}
.page-about .about-split__copy p:last-child {
  margin-bottom: 0;
}
.page-about .about-split__copy a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 169, 245, .45);
}
.page-about .about-split__copy a:hover {
  color: var(--blue-pale);
}
.page-about .about-split__copy .about-plate {
  margin-top: clamp(20px, 3vw, 28px);
}
@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, .8fr);
  }
  .page-about .about-split--media-first {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1fr);
  }
}
@media (max-width: 899px) {
  .page-about .about-split--media-first .about-figure {
    order: 2;
  }
  .page-about .about-split--media-first .about-split__copy {
    order: 1;
  }
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-about .about-figure__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, var(--turf), var(--night));
  box-shadow: var(--shadow-card);
}
.page-about .about-figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(8, 23, 15, 0) 58%, rgba(8, 23, 15, .52) 100%);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.94) contrast(1.04);
}
.page-about .about-figure--wide img {
  aspect-ratio: 16 / 9;
}
.page-about .about-figure--tall img {
  aspect-ratio: 4 / 3;
}
.page-about .about-figure--bg img {
  aspect-ratio: 7 / 4;
}
.page-about .about-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-partners__lede {
  margin: 0 0 clamp(22px, 3.4vw, 36px);
  max-width: 44em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(243, 248, 245, .85);
}
.page-about .about-wall {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
}
@media (min-width: 640px) {
  .page-about .about-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1024px) {
  .page-about .about-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .about-wall__item {
  position: relative;
  padding: 22px 20px 20px;
  background: linear-gradient(160deg, rgba(20, 53, 42, .9), rgba(14, 36, 25, .74));
  border: 1px solid var(--line-soft);
  transition: transform .22s var(--ease), border-color .22s var(--ease), box-shadow .22s var(--ease);
}
.page-about .about-wall__item:hover {
  transform: translateY(-4px);
  border-color: var(--grid);
  box-shadow: var(--shadow-card);
}
.page-about .about-wall__count {
  display: block;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  color: var(--blue);
}
.page-about .about-wall__label {
  display: block;
  margin-top: 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}
.page-about .about-wall__note {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
  opacity: .55;
  transform: translateY(3px);
  transition: opacity .24s var(--ease), color .24s var(--ease), transform .24s var(--ease);
}
.page-about .about-wall__item:hover .about-wall__note {
  opacity: 1;
  transform: translateY(0);
  color: var(--blue-pale);
}

/* ---------- 06 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 106, 46, .9), rgba(31, 90, 66, .55) 24%, rgba(31, 90, 66, .3) 100%);
}
.page-about .about-timeline__item {
  position: relative;
  padding-left: clamp(28px, 4vw, 44px);
  padding-bottom: clamp(32px, 4.6vw, 54px);
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--grid);
  background: var(--night);
  transition: border-color .45s var(--ease), background-color .45s var(--ease), box-shadow .45s var(--ease);
}
.page-about .about-timeline__item.is-in .about-timeline__dot {
  border-color: var(--signal);
  background: rgba(255, 106, 46, .24);
  box-shadow: 0 0 0 5px rgba(255, 106, 46, .12);
}
.page-about .about-timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-bottom: 10px;
}
.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  color: var(--signal-soft);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-about .about-timeline__year {
    background: linear-gradient(118deg, var(--yellow), var(--signal));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}
.page-about .about-timeline__title {
  margin: 0;
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--white);
}
.page-about .about-timeline__text {
  margin: 0;
  max-width: 46em;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(243, 248, 245, .8);
}
.page-about .about-timeline__toggle {
  margin-top: 14px;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--blue-pale);
  background: transparent;
  border: 1px solid rgba(63, 169, 245, .35);
  cursor: pointer;
  transition: background-color .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}
.page-about .about-timeline__toggle:hover {
  background: rgba(63, 169, 245, .12);
  border-color: var(--blue);
  color: var(--white);
}
.page-about .about-timeline__toggle[aria-expanded="true"] {
  border-color: var(--signal);
  color: var(--signal-soft);
}
.page-about .about-timeline__panel {
  margin-top: 12px;
  padding: 14px 18px;
  border-left: 2px solid var(--signal);
  background: rgba(20, 53, 42, .62);
}
.page-about .about-timeline__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(243, 248, 245, .78);
}

/* ---------- 07 合作咨询 ---------- */
.page-about .about-cta {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(28px, 4.2vw, 56px) clamp(20px, 3.4vw, 48px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 6% 0%, rgba(255, 106, 46, .18) 0%, rgba(255, 106, 46, 0) 56%),
    radial-gradient(100% 130% at 96% 100%, rgba(63, 169, 245, .2) 0%, rgba(63, 169, 245, 0) 60%),
    linear-gradient(160deg, rgba(20, 53, 42, .95), rgba(8, 23, 15, .95));
}
@media (min-width: 900px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
    align-items: center;
  }
}
.page-about .about-cta__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--blue-pale);
}
.page-about .about-cta__head {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.025em;
  color: var(--white);
}
.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(243, 248, 245, .82);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-cta__actions .btn {
  min-width: 140px;
  justify-content: center;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.page-about .about-cta__actions .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px -18px rgba(255, 106, 46, .85);
}
.page-about .about-cta__list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}
.page-about .about-cta__list li {
  padding: 16px 18px;
  background: rgba(14, 36, 25, .9);
}
.page-about .about-cta__list strong {
  display: block;
  margin-bottom: 5px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--white);
}
.page-about .about-cta__list span {
  display: block;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 动效 ---------- */
.page-about [data-reveal] {
  transition: opacity .42s var(--ease), transform .42s var(--ease);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    transition: opacity .2s linear;
    transform: none !important;
  }
  .page-about .about-trio__card:hover,
  .page-about .about-wall__item:hover,
  .page-about .about-cta__actions .btn:hover {
    transform: none;
  }
  .page-about .about-timeline__dot,
  .page-about .about-wall__note {
    transition: none;
  }
}