.page-about {
  --ab-aside-w: 272px;
  --ab-hero-lift: 44px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: calc(var(--header-h) + var(--ab-hero-lift)) clamp(40px, 6vw, 84px);
  background:
    radial-gradient(120% 92% at 94% -6%, rgba(242, 184, 198, .52), transparent 58%),
    radial-gradient(86% 74% at 0% 104%, rgba(203, 212, 208, .56), transparent 62%),
    linear-gradient(180deg, var(--paper-2), var(--paper) 62%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--rule-soft);
}

.page-about .ab-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
  align-items: end;
}

.page-about .ab-hero-copy {
  min-width: 0;
}

.page-about .ab-hero h1.display {
  margin: .26em 0 .1em;
  font-size: clamp(34px, 6.6vw, 72px);
  line-height: 1.04;
  letter-spacing: -.028em;
  color: var(--ink-green);
  text-wrap: balance;
}

.page-about .ab-hl {
  position: relative;
  display: inline-block;
  color: var(--ink-green);
  z-index: 0;
}

.page-about .ab-hl::after {
  content: "";
  position: absolute;
  left: -.06em;
  right: -.06em;
  bottom: .08em;
  height: .34em;
  background: var(--sakura);
  z-index: -1;
  border-radius: 2px;
}

.page-about .ab-hero .lede {
  margin-top: 18px;
  max-width: 34em;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
}

.page-about .ab-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 30px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--rule-soft);
}

.page-about .ab-stat {
  min-width: 92px;
}

.page-about .ab-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.9vw, 29px);
  font-weight: 700;
  line-height: 1.12;
  color: var(--ink-green);
  letter-spacing: -.01em;
}

.page-about .ab-stat span {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .ab-hero-visual {
  position: relative;
  min-width: 0;
}

.page-about .ab-hero-frame {
  aspect-ratio: 16 / 11;
  overflow: hidden;
  border: 1px solid var(--rule-soft);
  border-radius: var(--r-m);
  background: var(--winter);
  box-shadow: var(--shadow-2);
}

.page-about .ab-hero-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .ab-hero-stamp {
  position: absolute;
  left: -6px;
  bottom: -16px;
  width: 104px;
  height: 104px;
  margin: 0;
  display: grid;
  place-content: center;
  text-align: center;
  border: 1px solid var(--rule);
  border-radius: 50%;
  background: var(--paper-2);
  color: var(--ink-green);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: .06em;
  transform: rotate(-7deg);
  box-shadow: var(--shadow-1);
}

.page-about .ab-hero-stamp span {
  display: block;
  margin-top: 4px;
  font-size: 10px;
  color: var(--autumn-deep);
  letter-spacing: .14em;
}

/* ---------- 主体两栏 ---------- */
.page-about .ab-body {
  padding-block: clamp(38px, 5.4vw, 76px) clamp(56px, 8vw, 110px);
  background: var(--paper);
}

.page-about .ab-body-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 60px);
  align-items: start;
}

.page-about .ab-main {
  min-width: 0;
}

/* ---------- 侧栏摘要板 ---------- */
.page-about .ab-aside-card {
  border: 1px solid var(--rule-soft);
  border-top: 4px solid var(--ink-green);
  border-radius: var(--r-s);
  background: var(--paper-2);
  padding: 20px 18px 22px;
  box-shadow: var(--shadow-1);
}

.page-about .ab-aside-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--autumn-deep);
}

.page-about .ab-aside-lead {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .ab-aside-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-top: 1px dashed var(--rule-soft);
  padding-top: 12px;
}

.page-about .ab-aside-nav a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 6px;
  border-radius: 4px;
  color: var(--ink-green);
  font-size: 14px;
  text-decoration: none;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.page-about .ab-aside-nav a:hover,
.page-about .ab-aside-nav a:focus-visible {
  background: var(--sakura-soft);
  color: var(--sakura-deep);
}

.page-about .ab-aside-nav .mono {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--ink-soft);
}

.page-about .ab-aside-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--rule-soft);
}

/* ---------- 章节通用 ---------- */
.page-about .ab-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .ab-sec + .ab-sec {
  margin-top: clamp(46px, 6.2vw, 88px);
  padding-top: clamp(34px, 4.4vw, 60px);
  border-top: 1px solid var(--rule-soft);
}

.page-about .ab-sec-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.page-about .ab-sec-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--autumn);
}

.page-about .ab-sec-head h2 {
  margin: 0;
  font-size: clamp(23px, 3.3vw, 35px);
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--ink-green);
}

.page-about .ab-sec-lede {
  max-width: 36em;
  margin: 0 0 clamp(20px, 2.8vw, 30px);
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.page-about .ab-sec-foot {
  margin-top: 22px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-sec-foot a {
  color: var(--summer-deep);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .ab-sec-foot a:hover {
  color: var(--search);
}

/* ---------- 三张理念卡 ---------- */
.page-about .ab-cards3 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  border-left: 4px solid var(--season, var(--ink-green));
}

.page-about .ab-card-num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--season, var(--ink-green));
  opacity: .55;
}

.page-about .ab-card h3 {
  margin: 0;
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--ink-green);
}

.page-about .ab-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 时间线 ---------- */
.page-about .ab-tl-tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 22px;
}

.page-about .ab-tl-tabs .tab {
  font-size: 13px;
  letter-spacing: .03em;
  text-align: center;
}

.page-about .ab-tl {
  position: relative;
  padding-left: 28px;
  border-left: 1px dashed var(--rule-soft);
}

.page-about .ab-tl-node {
  position: relative;
  padding-bottom: 22px;
}

.page-about .ab-tl-node:last-child {
  padding-bottom: 0;
}

.page-about .ab-tl-node::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--paper-2);
  border: 2px solid var(--ink-green);
  box-sizing: content-box;
}

.page-about .ab-tl-node:first-child::before {
  background: var(--sakura);
}

.page-about .ab-tl-year {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--autumn-deep);
}

.page-about .ab-tl-node p:not(.ab-tl-year) {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--ink-soft);
  max-width: 34em;
}

/* ---------- 案例中心 ---------- */
.page-about .ab-center-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: center;
  margin-bottom: 26px;
}

.page-about .ab-ring {
  position: relative;
  width: 188px;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
}

.page-about .ab-ring svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .ab-ring-center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  gap: 2px;
}

.page-about .ab-ring-center b {
  font-size: 34px;
  line-height: 1;
  color: var(--ink-green);
}

.page-about .ab-ring-center span {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-soft);
}

.page-about .ab-note-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-note-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-about .ab-note-list b {
  color: var(--ink-green);
  margin-right: 6px;
}

.page-about .ab-dot {
  position: absolute;
  left: 0;
  top: .62em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-about .ab-dot--spring { background: var(--sakura); }
.page-about .ab-dot--summer { background: var(--summer); }
.page-about .ab-dot--autumn { background: var(--autumn); }
.page-about .ab-dot--winter { background: var(--winter); }

.page-about .ab-center-figure {
  margin: 0 0 22px;
  border-radius: var(--r-m);
  overflow: hidden;
  border: 1px solid var(--rule-soft);
}

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

.page-about .ab-matrix {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 13px 13px 15px;
  background: var(--paper-2);
  border: 1px solid var(--rule-soft);
  border-top: 3px solid var(--season, var(--ink-green));
  border-radius: 0 0 var(--r-s) var(--r-s);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .ab-cell:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.page-about .ab-cell-meta {
  margin: 0;
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--ink-soft);
}

.page-about .ab-cell-scene {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-green);
  letter-spacing: -.01em;
}

.page-about .ab-cell-text {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
}

.page-about .ab-role-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-role-list li {
  padding-left: 16px;
  border-left: 2px solid var(--rule-soft);
}

.page-about .ab-role-name {
  margin: 0 0 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--summer-deep);
}

.page-about .ab-role-list li p:not(.ab-role-name) {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-about .ab-team-more {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--rule-soft);
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .ab-team-figure {
  margin: 0;
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border: 1px solid var(--rule-soft);
  border-radius: var(--r-m);
  background: var(--winter);
}

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

/* ---------- 适合谁用 ---------- */
.page-about .ab-who-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .ab-who {
  padding: 18px 18px 20px;
  border: 1px solid var(--rule-soft);
  border-radius: var(--r-s);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--season) 18%, transparent), transparent 62%),
    var(--paper-2);
}

.page-about .ab-who h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  letter-spacing: -.01em;
  color: var(--ink-green);
}

.page-about .ab-who p {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--ink-soft);
}

/* ---------- 理由手风琴 ---------- */
.page-about .ab-accordion {
  border-top: 1px solid var(--rule-soft);
}

.page-about .ab-accordion .accordion-item {
  border-bottom: 1px solid var(--rule-soft);
}

.page-about .ab-accordion .accordion-trigger {
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--ink-green);
}

.page-about .ab-accordion .accordion-panel p {
  margin: 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--ink-soft);
}

/* ---------- 收尾 CTA ---------- */
.page-about .ab-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(22px, 3.4vw, 34px);
  border-radius: var(--r-m);
  background:
    radial-gradient(90% 130% at 100% 0%, rgba(47, 111, 143, .22), transparent 62%),
    var(--ink-green);
  color: var(--footer-ink);
}

.page-about .ab-cta-title {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: clamp(19px, 2.6vw, 25px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -.015em;
  color: #fff;
}

.page-about .ab-cta-text p:not(.ab-cta-title) {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(231, 227, 214, .82);
}

.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

.page-about .ab-cta-actions .btn-ghost {
  border-color: rgba(231, 227, 214, .5);
  color: var(--footer-ink);
}

.page-about .ab-cta-actions .btn-ghost:hover,
.page-about .ab-cta-actions .btn-ghost:focus-visible {
  border-color: #fff;
  color: #fff;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .ab-cards3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .ab-who-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .ab-matrix { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .ab-hero-stats { gap: 18px 36px; }
}

@media (min-width: 760px) {
  .page-about .ab-tl-tabs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .ab-center-top { grid-template-columns: 200px minmax(0, 1fr); }
  .page-about .ab-ring { margin-inline: 0; }
  .page-about .ab-cta { grid-template-columns: minmax(0, 1fr) auto; align-items: center; }
}

@media (min-width: 900px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  }
  .page-about .ab-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  }
}

@media (min-width: 1000px) {
  .page-about .ab-body-grid {
    grid-template-columns: var(--ab-aside-w) minmax(0, 1fr);
  }
  .page-about .ab-aside {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }
  .page-about .ab-matrix { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (max-width: 599px) {
  .page-about .ab-hero-stamp {
    width: 84px;
    height: 84px;
    font-size: 9.5px;
    left: -4px;
    bottom: -10px;
  }
  .page-about .ab-hero-stamp span { font-size: 8.5px; }
  .page-about .ab-stat { min-width: 76px; }
  .page-about .ab-sec-lede { font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-cell,
  .page-about .ab-aside-nav a {
    transition: none;
  }
  .page-about .ab-cell:hover {
    transform: none;
  }
  .page-about .ab-hero-stamp {
    transform: none;
  }
}

.page-about {
  --season: transparent;
}