.page-about {
  --about-paper-line: rgba(11, 15, 13, .14);
  --about-paper-text: rgba(11, 15, 13, .74);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.4rem, 4vw, 2.6rem) 0 clamp(2.8rem, 8vw, 5.4rem);
  background: linear-gradient(158deg, var(--ink) 0%, var(--ink-deep) 60%, var(--ink-soft) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -36%;
  right: -26%;
  width: min(640px, 84vw);
  aspect-ratio: 1 / 1;
  background: linear-gradient(145deg, rgba(15, 92, 63, .92), rgba(45, 125, 255, .1) 72%);
  border-radius: 38% 62% 46% 54% / 52% 40% 60% 48%;
  transform: rotate(-22deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 44%;
  background: linear-gradient(to top right, rgba(255, 106, 26, .18), rgba(255, 106, 26, 0) 62%);
  clip-path: polygon(0 100%, 0 28%, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs {
  margin-bottom: clamp(1.1rem, 3vw, 1.8rem);
  font-size: .82rem;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: .5rem;
  color: rgba(201, 209, 217, .4);
}

.page-about .breadcrumbs a {
  color: var(--silver);
  text-decoration: none;
  transition: color .25s var(--ease);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--orange);
}

.page-about .breadcrumbs li[aria-current] {
  color: rgba(201, 209, 217, .62);
}

.page-about .about-hero__title {
  margin: .6rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.6vw, 3.9rem);
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--orange);
}

.page-about .about-hero__lede {
  margin-top: 1.1rem;
  max-width: 48ch;
  color: rgba(247, 241, 230, .82);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(.9rem, 4vw, 2.8rem);
  margin-top: clamp(1.8rem, 5vw, 2.8rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-fact {
  min-width: 8.5rem;
}

.page-about .about-fact__num {
  display: block;
  font-size: clamp(1.45rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .about-fact__label {
  display: block;
  margin-top: .3rem;
  font-size: .8rem;
  line-height: 1.5;
  color: var(--silver);
}

/* ---------- 区块骨架 ---------- */
.page-about .about-section {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 9vw, 6.5rem) 0;
  background: var(--ink);
}

.page-about .about-section--mantra {
  background: linear-gradient(200deg, var(--ink-soft) 0%, var(--ink) 52%, var(--ink-deep) 100%);
}

.page-about .about-section--mantra::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -14%;
  width: min(540px, 74vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 42% 42%, rgba(15, 92, 63, .6), rgba(15, 92, 63, 0) 72%);
  border-radius: 44% 56% 62% 38% / 58% 42% 58% 42%;
  pointer-events: none;
}

.page-about .about-section--paper {
  background: var(--paper);
  color: var(--black);
}

.page-about .about-section--paper .section-title {
  color: var(--black);
}

.page-about .about-section--paper .prose p,
.page-about .about-section--paper .about-head__lede {
  color: var(--about-paper-text);
}

.page-about .about-index {
  display: block;
  font-size: clamp(2.1rem, 7vw, 3.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--orange);
}

.page-about .about-section--paper .about-index {
  color: var(--grass);
}

/* ---------- 图文两栏 ---------- */
.page-about .about-grid {
  display: grid;
  gap: clamp(1.8rem, 5vw, 3.2rem);
}

.page-about .about-grid__lead .section-title {
  margin-top: .5rem;
}

.page-about .about-grid__lead .prose {
  margin-top: 1rem;
}

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

.page-about .about-prose p {
  color: rgba(201, 209, 217, .8);
}

/* ---------- 理念区 ---------- */
.page-about .about-mantra {
  position: relative;
  z-index: 1;
}

.page-about .about-mantra__title {
  margin-top: .5rem;
  max-width: 18ch;
}

.page-about .about-mantra__lede {
  margin-top: 1rem;
  max-width: 46ch;
  color: rgba(247, 241, 230, .82);
}

.page-about .about-mantra__list {
  display: grid;
  gap: 1px;
  margin: clamp(1.8rem, 5vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
  background: var(--line-strong);
}

.page-about .about-mantra__item {
  padding: clamp(1.2rem, 3.5vw, 1.9rem) clamp(1rem, 3vw, 1.5rem);
  background: var(--ink-deep);
}

.page-about .about-mantra__item h3 {
  margin: 0 0 .55rem;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-mantra__item p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.75;
  color: rgba(201, 209, 217, .8);
}

/* ---------- 里程碑 ---------- */
.page-about .about-head {
  max-width: 56ch;
  margin-bottom: clamp(1.8rem, 5vw, 3rem);
}

.page-about .about-head__lede {
  margin-top: .9rem;
}

.page-about .about-milestones {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

.page-about .about-timeline {
  display: grid;
  gap: .9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: .4rem;
  padding: 1.05rem 1.15rem 1.2rem 1.5rem;
  border: 1px solid var(--about-paper-line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .55);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 1rem;
  bottom: 1rem;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(to bottom, var(--orange), rgba(255, 106, 26, .18));
  opacity: .45;
  transition: opacity .3s var(--ease);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: -5px;
  top: 1.55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 106, 26, .16);
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus-within {
  transform: translateY(-3px);
  border-color: rgba(255, 106, 26, .5);
  box-shadow: var(--shadow-lift);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  opacity: 1;
}

.page-about .about-timeline__year {
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--grass);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 .35rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--black);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--about-paper-text);
}

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

/* ---------- 团队数据 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(201, 209, 217, .16);
  overflow: hidden;
}

.page-about .about-stat {
  padding: 1rem .85rem 1.1rem;
  background: var(--ink);
}

.page-about .about-stat__num {
  display: block;
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--orange);
}

.page-about .about-stat__label {
  display: block;
  margin-top: .3rem;
  font-size: .78rem;
  color: var(--silver);
}

/* ---------- 服务地区 ---------- */
.page-about .about-region {
  display: grid;
  gap: clamp(1.8rem, 5vw, 3rem);
}

.page-about .about-region__lead .section-title {
  margin-top: .5rem;
}

.page-about .about-region__lead .prose {
  margin-top: 1rem;
}

.page-about .about-region__card {
  padding: clamp(1.4rem, 4vw, 2rem);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--ink) 0%, var(--grass) 140%);
  color: var(--paper);
  box-shadow: var(--shadow-lift);
}

.page-about .about-region__tag {
  display: inline-block;
  padding: .28rem .7rem;
  border: 1px solid rgba(255, 106, 26, .6);
  border-radius: 999px;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-region__word {
  margin: 1.1rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 9vw, 3.2rem);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-about .about-region__desc {
  margin: .9rem 0 0;
  font-size: .92rem;
  line-height: 1.75;
  color: rgba(247, 241, 230, .8);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  background: linear-gradient(120deg, var(--ink-deep) 0%, var(--ink) 58%, var(--ink-soft) 100%);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: -18%;
  bottom: -30%;
  width: min(460px, 72vw);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 50% 50%, rgba(255, 106, 26, .2), rgba(255, 106, 26, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-cta__text .prose {
  margin-top: 1rem;
  max-width: 52ch;
}

.page-about .about-cta__text .prose p {
  color: rgba(201, 209, 217, .82);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 1.7rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-timeline__item {
    grid-template-columns: 6.5rem minmax(0, 1fr);
    align-items: start;
    gap: 1.2rem;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }

  .page-about .about-region {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }

  .page-about .about-cta__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 2rem;
  }

  .page-about .about-cta__actions {
    margin-top: 0;
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .about-milestones {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-milestones__aside {
    position: sticky;
    top: 2rem;
  }
}

@media (hover: hover) {
  .page-about .about-region__card {
    transition: transform .35s var(--ease), box-shadow .35s var(--ease);
  }

  .page-about .about-region__card:hover {
    transform: translateY(-4px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-region__card,
  .page-about .about-timeline__item::before {
    transition: none;
  }

  .page-about .about-timeline__item:hover,
  .page-about .about-timeline__item:focus-within,
  .page-about .about-region__card:hover {
    transform: none;
  }
}