.page-about {
  --about-line: 3px solid var(--ink);
  background: var(--cream);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about .about-crumb {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--brown);
  letter-spacing: .04em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero__title {
  margin: 10px 0 16px;
  max-width: 17ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-hero__side {
  border-top: var(--about-line);
  padding-top: 16px;
}

.page-about .about-hero__note {
  writing-mode: vertical-rl;
  height: 176px;
  margin: 0 0 18px;
  padding-left: 10px;
  border-left: var(--about-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--brown);
  white-space: nowrap;
  overflow: hidden;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(94px, 1fr));
  gap: 10px;
  margin: 0;
}

.page-about .about-stat {
  border: var(--bd-2);
  background: var(--cream-2);
  padding: 12px 10px;
}

.page-about .about-stat dt {
  font-size: 12px;
  line-height: 1.4;
  color: var(--brown);
  margin: 0;
}

.page-about .about-stat dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--red);
}

.page-about .about-banner {
  position: relative;
  margin: clamp(28px, 5vw, 54px) 0 0;
  aspect-ratio: 2 / 1;
  border: var(--bd);
  box-shadow: var(--shadow);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-banner__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-banner__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(201, 247, 60, .16) 0 1px, transparent 1px 100%),
    linear-gradient(to bottom, rgba(201, 247, 60, .16) 0 1px, transparent 1px 100%);
  background-size: 72px 72px;
  pointer-events: none;
}

/* ---------- 章节头 ---------- */
.page-about .about-section-head {
  max-width: 64ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-section-head .h2 {
  margin: 10px 0 14px;
}

/* ---------- 时间线 ---------- */
.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-line);
}

.page-about .about-stop {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: clamp(20px, 3.4vw, 34px) 0 clamp(20px, 3.4vw, 34px) 18px;
  border-bottom: var(--bd-2);
  border-left: var(--about-line);
  transition: background var(--t) var(--ease);
}

.page-about .about-stop:hover,
.page-about .about-stop:focus-within {
  background: var(--cream-2);
}

.page-about .about-stop__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 7vw, 56px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.03em;
  color: var(--ink);
  transition: color var(--t) var(--ease);
}

.page-about .about-stop:hover .about-stop__num,
.page-about .about-stop:focus-within .about-stop__num {
  color: var(--red);
}

.page-about .about-stop__tag {
  display: inline-block;
  margin-top: 10px;
}

.page-about .about-stop__body h3 {
  margin: 0 0 10px;
}

.page-about .about-stop__body p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .about-stop__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-about .about-stop__points li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--brown);
}

.page-about .about-stop__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .6em;
  width: 9px;
  height: 9px;
  background: var(--orange);
  border: 2px solid var(--ink);
}

/* ---------- 使用场景 ---------- */
.page-about .about-who__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .about-who__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.6vw, 28px);
  border: var(--bd);
  background: var(--cream-2);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-about .about-who__card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow);
}

.page-about .about-who__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--white);
  background: var(--ink);
  border: var(--bd-2);
  padding: 3px 9px;
  align-self: flex-start;
}

.page-about .about-who__card h3 {
  margin: 4px 0 0;
}

.page-about .about-who__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .about-who__list {
  list-style: none;
  margin: auto 0 0;
  padding: 12px 0 0;
  border-top: var(--bd-2);
  display: grid;
  gap: 6px;
}

.page-about .about-who__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--brown);
}

.page-about .about-who__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .65em;
  width: 7px;
  height: 7px;
  background: var(--lime);
  border: 2px solid var(--ink);
}

/* ---------- 数据流程（深色段） ---------- */
.page-about .about-flow .about-section-head .lead {
  color: var(--on-dark);
}

.page-about .about-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .about-flow__step {
  position: relative;
  padding: clamp(18px, 3vw, 28px);
  border: 3px solid var(--cream);
  background: var(--ink-2);
}

.page-about .about-flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--lime);
  margin-bottom: 12px;
}

.page-about .about-flow__step h3 {
  margin: 0 0 10px;
  color: var(--white);
}

.page-about .about-flow__step p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-dark);
}

.page-about .about-flow__meta {
  margin: 0;
  padding-top: 10px;
  border-top: 2px solid rgba(234, 224, 206, .28);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--lime);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-team__text p {
  max-width: 56ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-team__text .h2 {
  margin: 10px 0 16px;
}

.page-about .about-team__fig {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  border: var(--bd);
  box-shadow: var(--shadow);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-team__grid-line {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(234, 224, 206, .14) 0 1px, transparent 1px 100%),
    linear-gradient(to bottom, rgba(234, 224, 206, .14) 0 1px, transparent 1px 100%);
  background-size: 56px 56px;
  pointer-events: none;
}

.page-about .about-chart__box {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(16px, 2.4vw, 26px);
  border: var(--bd);
  background: var(--cream-2);
  box-shadow: var(--shadow-sm);
}

.page-about .about-chart__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--brown);
}

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

.page-about .about-chart__label {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  fill: var(--ink);
}

.page-about .about-chart__val {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  fill: var(--red);
  transition: fill var(--t) var(--ease);
}

.page-about .about-chart__bar {
  fill: var(--red);
  transition: fill var(--t) var(--ease);
}

.page-about .about-chart__row:hover .about-chart__bar {
  fill: var(--orange);
}

.page-about .about-chart__row:hover .about-chart__val {
  fill: var(--ink);
}

/* ---------- 合作与认可 ---------- */
.page-about .about-partner__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-about .about-partner__item {
  padding: clamp(18px, 2.6vw, 26px);
  border: var(--bd);
  background: var(--cream);
  border-left-width: 8px;
  border-left-color: var(--red);
  transition: border-left-color var(--t) var(--ease), transform var(--t) var(--ease);
}

.page-about .about-partner__item:hover {
  border-left-color: var(--orange);
  transform: translateX(4px);
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--ink);
  margin-bottom: 10px;
}

.page-about .about-partner__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.page-about .about-partner__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--brown);
}

/* ---------- 本地服务 ---------- */
.page-about .about-local__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-local__fig {
  position: relative;
  margin: 0;
  aspect-ratio: 2 / 1;
  border: var(--bd);
  box-shadow: var(--shadow);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-local__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-local__grid-line {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(242, 115, 26, .18) 0 1px, transparent 1px 100%);
  background-size: 48px 100%;
  pointer-events: none;
}

.page-about .about-local__text .h2 {
  margin: 10px 0 16px;
}

.page-about .about-local__text p {
  max-width: 52ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-2);
}

.page-about .about-local__link {
  display: inline-block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  background: var(--ink);
  color: var(--cream);
  border-top: 8px solid var(--red);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  align-items: center;
}

.page-about .about-cta__line {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--on-dark);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-who__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-who__card--mid {
    margin-top: 30px;
  }

  .page-about .about-partner__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    justify-items: start;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(240px, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-stop {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
    padding-left: 26px;
  }

  .page-about .about-stop__year {
    position: sticky;
    top: calc(var(--head-h) + 28px);
    align-self: start;
  }

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

  .page-about .about-flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: calc(var(--gap) / -2);
    width: 12px;
    height: 12px;
    background: var(--orange);
    border: 3px solid var(--cream);
    transform: translate(50%, -50%) rotate(45deg);
    z-index: 2;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stop,
  .page-about .about-stop__num,
  .page-about .about-who__card,
  .page-about .about-partner__item,
  .page-about .about-chart__bar,
  .page-about .about-chart__val {
    transition: none;
  }

  .page-about .about-who__card:hover,
  .page-about .about-partner__item:hover {
    transform: none;
  }
}