.page-about {
  --about-rule: rgba(18, 25, 30, .14);
  --about-line-soft: rgba(245, 243, 238, .2);
  background: var(--snow);
  color: var(--ink);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--deep);
  color: var(--snow);
  padding: 36px 0 40px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, rgba(201, 162, 39, .14) 0%, rgba(201, 162, 39, 0) 44%),
    repeating-linear-gradient(90deg, rgba(245, 243, 238, .05) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-kicker {
  color: var(--gold);
  margin: 18px 0 0;
}

.page-about .about-h1 {
  font-size: clamp(2rem, 8.4vw, 4.6rem);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: -.01em;
  margin: 10px 0 20px;
  max-width: 15ch;
}

.page-about .about-lede {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(.96rem, 2.1vw, 1.1rem);
  line-height: 1.8;
  color: rgba(245, 243, 238, .82);
}

.page-about .about-facts {
  list-style: none;
  margin: 32px 0 0;
  padding: 20px 0 0;
  border-top: 2px solid var(--about-line-soft);
  display: grid;
  gap: 16px 24px;
  grid-template-columns: repeat(auto-fit, minmax(128px, 1fr));
}

.page-about .about-facts__k {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1.2;
  color: var(--gold);
}

.page-about .about-facts__v {
  display: block;
  margin-top: 4px;
  font-size: .78rem;
  letter-spacing: .16em;
  color: rgba(245, 243, 238, .6);
}

/* ---------- 横向图像切片 ---------- */
.page-about .about-slice {
  position: relative;
  margin: 0;
  background: var(--deep-2);
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
}

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

.page-about .about-slice__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: 8px 14px;
  background: var(--deep);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  line-height: 1.5;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: 48px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section:first-of-type {
  border-top: 0;
}

.page-about .about-section--last {
  padding-bottom: 64px;
  background: linear-gradient(180deg, var(--snow) 0%, rgba(216, 205, 184, .28) 100%);
}

.page-about .about-cols {
  display: grid;
  gap: 18px;
}

.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 2.2rem;
  line-height: 1;
  color: var(--gold);
  letter-spacing: .02em;
}

.page-about .about-rail__line {
  height: 2px;
  width: 48px;
  background: var(--gold);
  flex: 0 0 auto;
}

.page-about .about-body {
  min-width: 0;
  overflow-wrap: break-word;
}

.page-about .about-h2 {
  margin: 0 0 16px;
  font-size: clamp(1.45rem, 4.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.01em;
}

.page-about .about-body p {
  margin: 0 0 1.2em;
  max-width: 68ch;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-about .about-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 引文 ---------- */
.page-about .about-quote {
  margin: 28px 0 0;
  padding: 22px 24px;
  background: var(--sand);
  border: var(--line) solid var(--ink);
  border-left: 8px solid var(--saffron);
  font-size: clamp(1.02rem, 2.4vw, 1.3rem);
  line-height: 1.6;
  font-weight: 500;
  color: var(--ink);
  max-width: 60ch;
}

/* ---------- 阶段跳转 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 26px;
}

.page-about .about-jump a {
  display: inline-block;
  padding: 6px 12px;
  border: var(--line) solid var(--ink);
  background: var(--snow);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  text-decoration: none;
  transition: background-color .16s ease, color .16s ease;
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  background: var(--gold);
  color: var(--ink);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 4px 0 4px 32px;
  display: grid;
  gap: 18px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--saffron) 52%, var(--blue) 100%);
}

.page-about .about-stage {
  position: relative;
  background: var(--snow);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
  padding: 20px 20px 22px;
  scroll-margin-top: 96px;
  transition: box-shadow .18s ease, transform .18s ease, border-color .18s ease;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 24px;
  width: 14px;
  height: 14px;
  border: var(--line) solid var(--ink);
  border-radius: 50%;
  background: var(--snow);
}

.page-about .about-stage:hover {
  box-shadow: var(--shadow);
  transform: translate(-2px, -2px);
}

.page-about .about-stage:target {
  border-color: var(--gold);
  box-shadow: var(--shadow);
  transform: translate(-2px, -2px);
}

.page-about .about-stage:target::before {
  background: var(--gold);
}

.page-about .about-stage__ver {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--saffron);
}

.page-about .about-stage__title {
  margin: 0 0 10px;
  font-size: 1.14rem;
  font-weight: 700;
  line-height: 1.35;
}

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

.page-about .about-more {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--fog);
}

.page-about .about-more summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--blue);
}

.page-about .about-more summary::-webkit-details-marker {
  display: none;
}

.page-about .about-more summary::before {
  content: "+";
  font-size: 1rem;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-more[open] summary::before {
  content: "–";
}

.page-about .about-more p {
  margin: 10px 0 0;
  font-size: .94rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 6px 0 26px;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-team__card {
  background: var(--snow);
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  display: grid;
  gap: 8px;
  align-content: start;
  transition: box-shadow .18s ease, transform .18s ease;
}

.page-about .about-team__card:hover {
  box-shadow: var(--shadow);
  transform: translate(-2px, -2px);
}

.page-about .about-team__tag {
  justify-self: start;
  padding: 4px 10px;
  border: 1px solid var(--blue);
  background: rgba(46, 94, 140, .08);
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
}

.page-about .about-team__title {
  margin: 2px 0 0;
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.72;
}

/* ---------- 工作习惯 ---------- */
.page-about .about-habits {
  list-style: none;
  margin: 6px 0 26px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--line) solid var(--ink);
  border-bottom: var(--line) solid var(--ink);
}

.page-about .about-habits__item {
  padding: 20px 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-habits__item:first-child {
  border-top: 0;
}

.page-about .about-habits__title {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: .01em;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-habits__title::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--saffron);
  transform: translateY(-1px);
}

.page-about .about-habits__item p {
  margin: 0;
  font-size: .95rem;
}

/* ---------- 内嵌图 ---------- */
.page-about .about-figure {
  margin: 6px 0 0;
  border: var(--line) solid var(--ink);
  box-shadow: var(--shadow-sm);
  background: var(--deep);
}

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

.page-about .about-figure__cap {
  padding: 10px 14px;
  background: var(--deep);
  color: rgba(245, 243, 238, .86);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
}

/* ---------- 成果数字 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--about-line-soft);
  border: var(--line) solid var(--ink);
}

.page-about .about-stats li {
  background: var(--deep);
  padding: 20px 18px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: .8rem;
  letter-spacing: .1em;
  color: rgba(245, 243, 238, .7);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-cta .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: 76px 0 68px;
  }

  .page-about .about-section {
    padding: 68px 0;
  }

  .page-about .about-section--last {
    padding-bottom: 88px;
  }

  .page-about .about-cols {
    grid-template-columns: 116px minmax(0, 1fr);
    column-gap: 48px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 32px;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .page-about .about-rail__no {
    font-size: 2.8rem;
  }

  .page-about .about-rail__line {
    width: 2px;
    height: 88px;
  }

  .page-about .about-timeline {
    padding-left: 40px;
  }

  .page-about .about-stage::before {
    left: -40px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-figure--portrait {
    max-width: 760px;
  }
}

@media (max-width: 619px) {
  .page-about .about-slice__cap {
    position: static;
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage,
  .page-about .about-team__card,
  .page-about .about-jump a {
    transition: none;
  }

  .page-about .about-stage:hover,
  .page-about .about-stage:target,
  .page-about .about-team__card:hover {
    transform: none;
  }
}