.page-about {
  --about-gap: clamp(1rem, 2.6vw, 1.75rem);
  --about-pad: clamp(1.15rem, 3vw, 2.5rem);
  --about-ring: rgba(0, 229, 208, .16);
  background: var(--abyss);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-top: 1.15rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .2rem;
  font-size: .875rem;
}
.page-about .crumbs__sep {
  color: var(--mist);
  margin: 0 .3rem;
  opacity: .7;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 3rem) 0 clamp(2.25rem, 5vw, 4rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 208, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 208, .07) 1px, transparent 1px);
  background-size: 74px 74px;
  -webkit-mask-image: radial-gradient(120% 82% at 72% 8%, #000 18%, transparent 72%);
  mask-image: radial-gradient(120% 82% at 72% 8%, #000 18%, transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -30%;
  width: min(760px, 180vw);
  height: min(760px, 180vw);
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(0, 229, 208, .10), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.75rem);
  align-items: start;
}

.page-about .about-hero__title {
  margin: .6rem 0 0;
  font-size: clamp(2rem, 6.4vw, 4rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: .01em;
}
.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: clamp(64px, 16vw, 132px);
  height: 3px;
  margin-top: clamp(.9rem, 2vw, 1.4rem);
  background: linear-gradient(90deg, var(--neon), rgba(0, 229, 208, 0));
}

.page-about .about-hero__lead {
  margin: clamp(1rem, 2.4vw, 1.5rem) 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.85;
  color: var(--white);
  opacity: .92;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(1.4rem, 3vw, 2.1rem) 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-hero__facts li {
  background: var(--deep);
  padding: .85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
.page-about .about-hero__fact-num {
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  font-weight: 500;
  color: var(--gold);
  letter-spacing: .02em;
}
.page-about .about-hero__fact-label {
  font-size: .8125rem;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--deep);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}
.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(0, 229, 208, .14), transparent 46%);
  pointer-events: none;
}
.page-about .about-hero__corner {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46px;
  height: 46px;
  border-right: 2px solid var(--neon);
  border-bottom: 2px solid var(--neon);
  opacity: .8;
}

/* ---------- 章节堆叠容器 ---------- */
.page-about .about-flow {
  padding-top: clamp(1.4rem, 3.5vw, 2.6rem);
  padding-bottom: clamp(1.4rem, 3.5vw, 2.6rem);
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
}

.page-about .about-block {
  position: relative;
  padding: var(--about-pad);
  border-radius: var(--radius);
}
.page-about .about-block::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--neon);
}

.page-about .about-block__inner {
  display: grid;
  gap: clamp(1rem, 2.6vw, 1.9rem);
}

.page-about .about-block__aside {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.page-about .sec-num {
  margin: 0;
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: .1em;
  color: var(--neon);
}

.page-about .sec-title {
  margin: 0;
  font-size: clamp(1.4rem, 3.4vw, 2.25rem);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .about-block__aside .meta {
  font-size: .8125rem;
  color: var(--mist);
  line-height: 1.6;
}

.page-about .about-block__body p {
  margin: 0 0 .85rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--white);
  opacity: .92;
}
.page-about .about-block__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-block__note {
  margin-top: .4rem;
  padding-left: .9rem;
  border-left: 2px solid var(--neon);
  font-size: .9375rem;
  color: var(--neon-soft) !important;
}

.page-about .about-block__intro {
  max-width: 62ch;
}

/* ---------- 02 场景卡片 ---------- */
.page-about .about-scenes {
  margin-top: clamp(1rem, 2.4vw, 1.6rem);
}

.page-about .about-scene {
  position: relative;
  padding: clamp(1rem, 2.2vw, 1.5rem);
  background: var(--deep);
  border: 1px solid var(--line);
  border-left: 2px solid var(--neon);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: .55rem;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.page-about .about-scene:hover,
.page-about .about-scene:focus-within {
  transform: translateY(-2px);
  border-color: var(--neon);
  box-shadow: 0 14px 34px rgba(0, 229, 208, .12);
}
.page-about .about-scene__kicker {
  margin: 0;
  font-size: .8125rem;
  letter-spacing: .16em;
  color: var(--neon);
}
.page-about .about-scene__title {
  margin: 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}
.page-about .about-scene__text {
  margin: 0 !important;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .about-scene__link {
  color: var(--neon-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--about-ring);
}
.page-about .about-scene__link:hover,
.page-about .about-scene__link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 03 价值承诺 ---------- */
.page-about .about-promises {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.5rem);
  margin-top: .4rem;
}

.page-about .about-promise {
  padding: clamp(1rem, 2.2vw, 1.6rem);
  background: linear-gradient(180deg, rgba(0, 229, 208, .07), rgba(10, 39, 69, .9) 55%);
  border: 1px solid var(--line);
  border-top: 3px solid var(--neon);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: .6rem;
  transition: transform .25s ease, box-shadow .25s ease;
}
.page-about .about-promise:hover,
.page-about .about-promise:focus-within {
  transform: translateY(-2px);
  box-shadow: 0 16px 38px rgba(0, 229, 208, .13);
}

.page-about .about-promise__icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  color: var(--neon);
  border: 1px solid var(--about-ring);
  border-radius: var(--radius);
  background: rgba(0, 229, 208, .09);
}
.page-about .about-promise__icon svg {
  width: 20px;
  height: 20px;
  display: block;
}

.page-about .about-promise__title {
  margin: .2rem 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}
.page-about .about-promise__text {
  margin: 0 !important;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 04 年轮时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(1.1rem, 2.8vw, 1.9rem) 0 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: .6rem;
  bottom: .6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--neon), rgba(0, 229, 208, .1));
}

.page-about .about-year {
  position: relative;
  padding-left: 2rem;
  padding-bottom: clamp(1rem, 2.4vw, 1.6rem);
}
.page-about .about-year:last-child {
  padding-bottom: 0;
}

.page-about .about-year__dot {
  position: absolute;
  left: 0;
  top: .7rem;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--neon);
  background: var(--abyss);
  box-sizing: border-box;
  transition: background .25s ease, box-shadow .25s ease;
}
.page-about .about-year__dot--current {
  border-color: var(--gold);
  background: var(--gold);
}
.page-about .about-year:hover .about-year__dot,
.page-about .about-year:focus-within .about-year__dot {
  background: var(--neon);
  box-shadow: 0 0 0 6px rgba(0, 229, 208, .15);
}
.page-about .about-year:hover .about-year__dot--current,
.page-about .about-year:focus-within .about-year__dot--current {
  background: var(--gold);
  box-shadow: 0 0 0 6px rgba(242, 184, 75, .18);
}

.page-about .about-year__body {
  padding: clamp(.9rem, 2vw, 1.35rem);
  background: var(--deep);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  transition: border-color .25s ease, transform .25s ease, background .25s ease;
  outline: none;
}
.page-about .about-year__body:hover,
.page-about .about-year__body:focus-visible {
  border-color: var(--neon);
  background: var(--trench);
  transform: translateY(-2px);
}

.page-about .about-year__range {
  margin: 0;
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--neon-soft);
}
.page-about .about-year__range--gold {
  color: var(--gold);
}

.page-about .about-year__title {
  margin: .4rem 0 0;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--white);
}

.page-about .about-year__text {
  margin: .5rem 0 0 !important;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--white);
  opacity: .85;
}

.page-about .about-year__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--neon-soft);
  border-top: 1px dashed transparent;
  transition: max-height .4s ease, opacity .3s ease, margin-top .4s ease, padding-top .4s ease, border-color .4s ease;
}
.page-about .about-year__body:hover .about-year__more,
.page-about .about-year__body:focus-visible .about-year__more {
  max-height: 12rem;
  opacity: 1;
  margin-top: .75rem;
  padding-top: .7rem;
  border-top-color: var(--line);
}

.page-about .about-years__figure {
  margin: clamp(1.2rem, 3vw, 2rem) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--deep);
}
.page-about .about-years__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-about .about-years__caption {
  padding: .75rem 1rem;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 05 团队 ---------- */
.page-about .about-team__stats {
  list-style: none;
  margin: clamp(1rem, 2.4vw, 1.6rem) 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__stat {
  background: var(--deep);
  padding: .95rem 1.05rem;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: .2rem .6rem;
}
.page-about .about-team__stat-value {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 500;
  color: var(--gold);
  letter-spacing: .02em;
}
.page-about .about-team__stat-unit {
  font-size: .875rem;
  color: var(--white);
  font-weight: 700;
}
.page-about .about-team__stat-note {
  grid-column: 1 / -1;
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-team__figure {
  margin: clamp(1.1rem, 2.8vw, 1.8rem) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--deep);
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .about-team__caption {
  padding: .75rem 1rem;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

/* ---------- 尾部行动区 ---------- */
.page-about .about-cta {
  position: relative;
  margin-top: clamp(.5rem, 2vw, 1rem);
  padding: clamp(1.6rem, 4vw, 2.8rem) 0 clamp(2.2rem, 5vw, 3.5rem);
  border-top: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(0, 229, 208, .11), transparent 58%),
    var(--abyss);
  overflow: hidden;
}
.page-about .about-cta__inner {
  position: relative;
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: center;
}
.page-about .about-cta__title {
  margin: .5rem 0 0;
  font-size: clamp(1.5rem, 3.8vw, 2.4rem);
  font-weight: 900;
  line-height: 1.24;
  color: var(--white);
}
.page-about .about-cta__lead {
  margin: .85rem 0 0;
  max-width: 58ch;
  font-size: .9688rem;
  line-height: 1.85;
  color: var(--mist);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
}
.page-about .about-cta__actions .btn {
  white-space: nowrap;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-team__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__stat {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }

  .page-about .about-block__inner {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3.25rem);
  }

  .page-about .about-block__aside {
    position: sticky;
    top: 1.5rem;
    align-self: start;
  }

  .page-about .about-promises {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .about-promise:nth-child(2) {
    margin-top: 1.85rem;
  }
  .page-about .about-promise:nth-child(3) {
    margin-top: .8rem;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }
  .page-about .about-cta__actions {
    justify-content: flex-end;
    max-width: 22rem;
  }
}

@media (min-width: 1100px) {
  .page-about .about-year {
    padding-left: 2.5rem;
  }
  .page-about .about-timeline::before {
    left: 8px;
  }
  .page-about .about-year__dot {
    width: 17px;
    height: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-scene,
  .page-about .about-promise,
  .page-about .about-year__body,
  .page-about .about-year__dot,
  .page-about .about-year__more {
    transition: none !important;
  }
}