.page-about {
  --about-soft: rgba(42, 51, 88, 0.72);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-block: 1.5rem 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(115% 85% at 88% 4%, rgba(56, 240, 216, 0.13), transparent 60%),
    radial-gradient(95% 75% at 4% 2%, rgba(30, 42, 94, 0.9), transparent 66%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-hero__lead h1 {
  margin: 0.6rem 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lead .lede {
  margin-top: 1.1rem;
  max-width: 56ch;
}

.page-about .about-hero__lead .cta-row {
  margin-top: 1.75rem;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900) 72%);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 服务对象 ---------- */
.page-about .about-personas {
  list-style: none;
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-personas__item {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  align-items: baseline;
  gap: 0.4rem 0.9rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--t), padding-inline var(--t);
}

.page-about .about-personas__item:hover {
  background: linear-gradient(90deg, rgba(56, 240, 216, 0.08), transparent 74%);
}

.page-about .about-personas__num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-personas__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--star);
}

.page-about .about-personas__text {
  margin: 0.45rem 0 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--haze);
}

.page-about .about-personas__item .tag {
  grid-column: 2;
  justify-self: start;
}

/* ---------- 数据展签 ---------- */
.page-about .about-plates {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 1.25rem;
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .about-plates .plate {
  padding: 1.1rem 0 1.1rem 1rem;
  border-top: 1px solid var(--line);
  transition: transform var(--t), border-color var(--t);
}

.page-about .about-plates .plate:hover,
.page-about .about-plates .plate:focus-visible {
  transform: translateY(-3px);
  border-top-color: var(--cyan);
}

.page-about .about-plates .plate:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-plates .plate__value {
  display: block;
  margin-top: 0.35rem;
  font-size: clamp(1.9rem, 4.2vw, 2.8rem);
  line-height: 1;
}

.page-about .about-plates__unit {
  margin-left: 0.2rem;
  font-size: 0.5em;
  letter-spacing: 0.06em;
  color: var(--haze);
}

/* ---------- 时间轴 ---------- */
.page-about .about-journey__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.6rem;
  bottom: 1.6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-deep) 42%, var(--line) 100%);
}

.page-about .about-stage {
  position: relative;
  padding: 0 0 1.85rem 2.4rem;
}

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

.page-about .about-stage .timeline__marker {
  position: absolute;
  left: 0;
  top: 0.45rem;
  display: block;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--ink-900);
  transition: background var(--t), box-shadow var(--t);
}

.page-about .about-stage:hover .timeline__marker,
.page-about .about-stage:focus-within .timeline__marker {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(56, 240, 216, 0.14);
}

.page-about .about-stage__ver {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-stage__title {
  margin: 0.3rem 0 0;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--star);
}

.page-about .about-stage__text {
  margin: 0.4rem 0 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--haze);
}

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

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

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

.page-about .about-team__body h2 {
  margin: 0.6rem 0 0;
}

.page-about .about-team__body p {
  margin: 1rem 0 0;
  max-width: 62ch;
  line-height: 1.75;
  color: var(--haze);
}

.page-about .about-team__facts {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__facts li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9375rem;
  color: var(--haze);
}

.page-about .about-team__facts .data-num {
  color: var(--amber-soft);
  font-weight: 600;
}

/* ---------- 用户构成与地域 ---------- */
.page-about .about-region__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-region__number {
  display: block;
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 7vw, 4rem);
  font-weight: 600;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-region__caption {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: var(--haze);
}

.page-about .about-region__split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.page-about .about-region__split-item {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--cyan);
}

.page-about .about-region__split-label {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--haze);
}

.page-about .about-region__body h2 {
  margin: 0;
}

.page-about .about-region__body p {
  margin: 1rem 0 0;
  max-width: 64ch;
  line-height: 1.75;
  color: var(--haze);
}

.page-about .about-region__map {
  display: block;
  width: min(100%, 340px);
  height: auto;
  margin-top: 1.75rem;
}

.page-about .about-region__map path {
  fill: rgba(56, 240, 216, 0.06);
  stroke: var(--cyan);
  stroke-width: 1.2;
  stroke-linejoin: round;
}

/* ---------- 协作网络 ---------- */
.page-about .about-folds {
  display: grid;
  gap: 0.9rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .about-folds .fold {
  border-radius: var(--r-md);
  transition: transform var(--t);
}

.page-about .about-folds .fold:hover {
  transform: translateY(-2px);
}

.page-about .about-folds .fold__panel p {
  margin: 0;
  max-width: 66ch;
  line-height: 1.75;
  color: var(--haze);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(1.75rem, 5vw, 3rem);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 140% at 88% 0%, rgba(255, 138, 61, 0.16), transparent 58%),
    linear-gradient(140deg, var(--ink-800), var(--ink-700) 96%);
}

.page-about .about-cta h2 {
  margin: 0.6rem 0 0;
  max-width: 24ch;
}

.page-about .about-cta p {
  margin: 1rem 0 0;
  max-width: 58ch;
  line-height: 1.75;
  color: var(--haze);
}

.page-about .about-cta .cta-row {
  margin-top: 1.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-personas__item {
    grid-template-columns: 3rem minmax(0, 1fr) auto;
    align-items: center;
    gap: 0 1.5rem;
  }

  .page-about .about-personas__item .tag {
    grid-column: auto;
    justify-self: end;
  }

  .page-about .about-plates {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-journey__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 22rem);
    align-items: start;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
    gap: clamp(2rem, 5vw, 3.5rem);
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 3.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-plates .plate:hover,
  .page-about .about-folds .fold:hover {
    transform: none;
  }
}