/* ===== 品牌历程 · 页面专属样式 ===== */

.page-about {
  --about-rail: 118px;
  --about-gap: clamp(18px, 3.2vw, 52px);
  --about-pad: clamp(46px, 7vw, 108px);
  --about-hair: rgba(143, 167, 154, 0.22);
  --about-brown-line: rgba(34, 26, 20, 0.22);
  background: var(--ink);
  color: var(--chalk);
  overflow-x: hidden;
}

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

/* ---------- 封面 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(40px, 6vw, 78px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-hair) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-hair) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(130% 92% at 12% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(130% 92% at 12% 0%, #000 0%, transparent 72%);
  opacity: 0.65;
  pointer-events: none;
}

.page-about .about-hero__eyebrow {
  margin-top: clamp(20px, 3vw, 42px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 16em;
  font-size: clamp(30px, 5.6vw, 70px);
  font-weight: 300;
  line-height: 1.13;
  letter-spacing: -0.012em;
  color: var(--chalk);
}

.page-about .about-hero__lede {
  margin-top: 22px;
  max-width: 46ch;
  color: rgba(247, 245, 239, 0.76);
}

.page-about .about-hero__marks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 5vw, 58px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-mark {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--ink);
}

.page-about .about-mark__num {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange);
}

.page-about .about-mark__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  padding: var(--about-pad) 0 clamp(38px, 5vw, 68px);
  background: var(--ink);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(26px, 4vw, 50px);
  margin-top: clamp(22px, 3.6vw, 42px);
}

.page-about .about-origin__prose {
  margin-top: 18px;
  max-width: 42ch;
  color: rgba(247, 245, 239, 0.8);
}

.page-about .about-origin__prose p + p {
  margin-top: 16px;
}

.page-about .about-quote {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: clamp(18px, 3vw, 28px);
  background: var(--cream);
  color: var(--brown);
  border: 3px solid var(--brown);
  box-shadow: var(--hard-shadow);
}

.page-about .about-quote__text {
  margin: 0;
  font-size: clamp(24px, 3.6vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--brown);
}

.page-about .about-quote__note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--brown);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(34, 26, 20, 0.78);
}

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

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  padding: var(--about-pad) 0;
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline__list {
  position: relative;
  margin: clamp(26px, 4.4vw, 54px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stop {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 3.2vw, 34px) 0;
  border-top: 1px solid var(--line);
  transition: background-color 0.24s var(--ease);
}

.page-about .about-stop:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-stop__mark {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-stop__year {
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--mist);
  transition: color 0.28s var(--ease);
}

.page-about .about-stop.is-in .about-stop__year {
  color: var(--orange);
}

.page-about .about-stop__phase {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(143, 167, 154, 0.85);
}

.page-about .about-stop__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--chalk);
}

.page-about .about-stop__body p {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(247, 245, 239, 0.74);
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-scope {
  padding: var(--about-pad) 0;
  background: var(--ink);
}

.page-about .about-scope__board {
  margin-top: clamp(24px, 4vw, 46px);
  padding: clamp(20px, 3.4vw, 42px);
  background: var(--cream);
  color: var(--brown);
  border: 3px solid var(--brown);
  box-shadow: var(--hard-shadow);
}

.page-about .about-scope__head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--brown);
}

.page-about .about-scope__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(34, 26, 20, 0.62);
}

.page-about .about-scope__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 3vw, 40px);
  padding: clamp(18px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--about-brown-line);
}

.page-about .about-scope__figure {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-scope__big {
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--brown);
}

.page-about .about-scope__unit {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(34, 26, 20, 0.68);
}

.page-about .about-scope__rows {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-scope__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-brown-line);
}

.page-about .about-scope__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-about .about-scope__label {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 800;
  color: var(--brown);
}

.page-about .about-scope__row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(34, 26, 20, 0.78);
}

.page-about .about-scope__note {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 16px 18px;
  border-left: 5px solid var(--orange);
  background: rgba(34, 26, 20, 0.06);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(34, 26, 20, 0.82);
}

/* ---------- 数据团队 ---------- */

.page-about .about-team {
  padding: var(--about-pad) 0;
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 50px);
}

.page-about .about-team__prose {
  margin-top: 18px;
  max-width: 44ch;
  color: rgba(247, 245, 239, 0.8);
}

.page-about .about-team__prose p + p {
  margin-top: 16px;
}

.page-about .about-team__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--panel);
}

.page-about .about-team__fact-num {
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
}

.page-about .about-team__fact-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

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

/* ---------- 使用规模 ---------- */

.page-about .about-scale {
  padding: var(--about-pad) 0;
  background: var(--ink);
}

.page-about .about-scale__lede {
  margin-top: 18px;
  max-width: 48ch;
  color: rgba(247, 245, 239, 0.76);
}

.page-about .about-scale__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-scale__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 3vw, 28px) clamp(14px, 2.4vw, 22px);
  background: var(--ink);
}

.page-about .about-scale__num {
  display: block;
  font-size: clamp(30px, 4.4vw, 50px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-scale__unit {
  margin-left: 4px;
  font-size: 0.42em;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-scale__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.page-about .about-scale__media {
  margin: clamp(28px, 4.4vw, 52px) 0 0;
}

/* ---------- 下一步 ---------- */

.page-about .about-next {
  padding: var(--about-pad) 0 calc(var(--about-pad) + 12px);
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.page-about .about-next__list {
  margin: clamp(24px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__item {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 3vw, 28px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-next__item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-next__idx {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-about .about-next__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--chalk);
}

.page-about .about-next__body p {
  margin: 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(247, 245, 239, 0.74);
}

.page-about .about-next__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .about-next__more {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-next__link {
  color: var(--orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  color: var(--chalk);
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-about .about-hero__marks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-scope__row {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
    padding: 18px 0;
  }

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

@media (min-width: 900px) {
  .page-about .about-origin__grid,
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-stop {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-stop__mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .about-timeline__list::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: calc(var(--about-rail) - 2px);
    width: 1px;
    background: var(--line);
    pointer-events: none;
  }

  .page-about .about-next__item {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
    padding: clamp(20px, 3vw, 30px) 0;
  }

  .page-about .about-next__idx {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stop,
  .page-about .about-stop__year {
    transition: none;
  }
}
<<<END>>>