.page-about {
  --about-rule: 2px solid var(--ink);
  --about-head-gap: clamp(24px, 3vw, 40px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
}

.page-about .about-hero__kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ochre);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 76px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 44ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__fact {
  padding: 7px 12px;
  border: var(--about-rule);
  background: var(--paper-white);
  box-shadow: var(--shadow-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink);
}

.page-about .about-hero__figure {
  margin: 0;
  border: var(--about-rule);
  background: var(--paper-white);
  box-shadow: 8px 8px 0 var(--ochre);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-bottom: var(--about-rule);
}

.page-about .about-hero__figure figcaption {
  padding: 9px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stone);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-block: clamp(38px, 6vw, 78px);
}

.page-about .about-section__head {
  display: grid;
  gap: 10px;
  margin-bottom: var(--about-head-gap);
  padding-top: 18px;
  border-top: var(--about-rule);
}

.page-about .about-section__label {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ochre);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(25px, 3.6vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-section__text {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--stone);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 38px);
}

.page-about .about-origin__lead {
  margin: 0;
  max-width: 42ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.9;
  color: var(--ink);
}

.page-about .about-origin__notes {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-origin__note {
  margin: 0;
  padding: 14px 16px;
  border: var(--about-rule);
  background: var(--paper-white);
  box-shadow: var(--shadow-soft);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-origin__note-key {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ochre);
}

/* ---------- 02 团队靛蓝色带 ---------- */
.page-about .about-team {
  position: relative;
  margin-block: clamp(20px, 4vw, 48px);
  padding-block: clamp(42px, 6vw, 82px);
  background: var(--indigo);
  color: var(--paper-white);
}

.page-about .about-team .about-section__head {
  border-top-color: var(--flag-yellow);
}

.page-about .about-team .about-section__label,
.page-about .about-team .section-no {
  color: var(--flag-yellow);
}

.page-about .about-team .about-section__title {
  color: var(--paper-white);
}

.page-about .about-team__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team__card {
  padding: 22px 20px;
  border: 2px solid var(--paper-white);
  background: rgba(253, 251, 246, 0.06);
  transition: border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  border-color: var(--flag-yellow);
  box-shadow: 6px 6px 0 var(--ochre);
}

.page-about .about-team__role {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--flag-yellow);
}

.page-about .about-team__title {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.35;
  color: var(--paper-white);
}

.page-about .about-team__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(253, 251, 246, 0.82);
}

.page-about .about-team__figure {
  margin: clamp(24px, 3vw, 36px) 0 0;
  border: 2px solid var(--paper-white);
  background: var(--paper-white);
  box-shadow: 8px 8px 0 var(--ochre);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  padding: 9px 14px;
  border-top: var(--about-rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stone);
}

/* ---------- 03 时间轴 ---------- */
.page-about .about-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px clamp(14px, 2vw, 30px);
  padding: 22px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-timeline__year {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 54px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
  transition: color 160ms var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__year,
.page-about .about-timeline__item:focus-within .about-timeline__year {
  color: var(--ochre);
}

.page-about .about-timeline__body {
  max-width: 58ch;
}

.page-about .about-timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(16px, 1.9vw, 21px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-timeline__extra {
  margin: 10px 0 0;
  padding-left: 12px;
  border-left: 3px solid var(--ochre);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 04 发布流程 ---------- */
.page-about .about-flow__steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-flow__step {
  padding: 20px;
  border: var(--about-rule);
  background: var(--paper-white);
  box-shadow: var(--shadow-hard);
  transition: box-shadow 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .about-flow__step:hover {
  transform: translate(3px, 3px);
  box-shadow: 2px 2px 0 var(--ink);
}

.page-about .about-flow__no {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 34px;
  line-height: 1;
  color: var(--ochre);
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-flow__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-flow__figure {
  margin: clamp(24px, 3vw, 36px) 0 0;
  border: var(--about-rule);
  background: var(--paper-white);
  box-shadow: 8px 8px 0 var(--ochre-pale);
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-flow__figure figcaption {
  padding: 9px 14px;
  border-top: var(--about-rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--stone);
}

/* ---------- 05 稳定与回访 ---------- */
.page-about .about-stable__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  background: var(--ink);
  border: var(--about-rule);
  box-shadow: 8px 8px 0 var(--ochre-pale);
}

.page-about .about-stable__stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  background: var(--paper-white);
}

.page-about .about-stable__num {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--indigo);
}

.page-about .about-stable__label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--stone);
}

.page-about .about-stable__note {
  margin: 0;
  max-width: 52ch;
  padding-left: 14px;
  border-left: 3px solid var(--flag-blue);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 06 往前看 ---------- */
.page-about .about-next__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--about-rule);
}

.page-about .about-next__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: var(--about-rule);
}

.page-about .about-next__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: var(--about-rule);
  background: var(--ochre-pale);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink);
}

.page-about .about-next__title {
  margin: 0 0 6px;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-next__text {
  margin: 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 出站指引 ---------- */
.page-about .about-links {
  padding-bottom: clamp(44px, 7vw, 92px);
}

.page-about .about-links__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding-top: 18px;
  border-top: var(--about-rule);
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.25;
  color: var(--ink);
}

.page-about .about-links__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-links__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px;
  border: var(--about-rule);
  background: var(--paper-white);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  color: var(--ink);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 16px;
  transition: background-color 150ms var(--ease), color 150ms var(--ease),
    transform 150ms var(--ease), box-shadow 150ms var(--ease);
}

.page-about .about-links__item:hover {
  background: var(--indigo);
  color: var(--paper-white);
  transform: translate(2px, 2px);
  box-shadow: 0 0 0 var(--ink);
}

.page-about .about-links__item:focus-visible {
  outline: 2px solid var(--flag-yellow);
  outline-offset: 3px;
}

.page-about .about-links__arrow {
  font-family: var(--font-mono);
  font-size: 16px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-links__grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: clamp(28px, 4vw, 48px);
  }

  .page-about .about-team__cards {
    grid-template-columns: 1.25fr 1fr 1fr;
    align-items: start;
  }

  .page-about .about-team__card:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-team__card:nth-child(3) {
    margin-top: 52px;
  }

  .page-about .about-flow__steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
  }

  .page-about .about-flow__step {
    position: relative;
  }

  .page-about .about-flow__step::after {
    content: "";
    position: absolute;
    top: 36px;
    right: -13px;
    width: 12px;
    height: 2px;
    background: var(--ink);
  }

  .page-about .about-flow__step:last-child::after {
    display: none;
  }

  .page-about .about-timeline__item {
    grid-template-columns: minmax(140px, 200px) 1fr;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .page-about .about-section__head {
    grid-template-columns: 1fr;
    align-items: end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step,
  .page-about .about-links__item,
  .page-about .about-team__card,
  .page-about .about-timeline__year {
    transition: none;
  }

  .page-about .about-flow__step:hover,
  .page-about .about-links__item:hover {
    transform: none;
  }
}