.page-about {
  --ab-rule-ink: rgba(30, 26, 22, 0.14);
  --ab-rule-night: rgba(201, 169, 106, 0.22);
  --ab-radius: 20px;
  --ab-gap: clamp(1rem, 3.4vw, 2rem);
  background:
    radial-gradient(70rem 42rem at 6% -12%, rgba(43, 179, 163, 0.16), transparent 62%),
    radial-gradient(52rem 34rem at 98% 6%, rgba(240, 90, 40, 0.10), transparent 58%),
    linear-gradient(180deg, var(--ky-night) 0%, var(--ky-abyss) 100%);
  color: var(--ky-cream);
  font-family: var(--ky-font-body);
  overflow-x: clip;
  padding-bottom: clamp(2.6rem, 7vw, 5rem);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--ky-font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.08;
  margin: 0;
  color: inherit;
}

.page-about h1 {
  font-size: clamp(2.1rem, 8.2vw, 4.3rem);
  line-height: 1.02;
  margin-bottom: 1rem;
}

.page-about h2 {
  font-size: clamp(1.55rem, 5.2vw, 2.6rem);
  margin-bottom: 0.9rem;
}

.page-about h3 {
  font-size: clamp(1.02rem, 3.1vw, 1.22rem);
  margin-bottom: 0.45rem;
}

.page-about p {
  margin: 0 0 0.9rem;
  line-height: 1.75;
}

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

/* ---------- 面包屑与首屏 ---------- */
.page-about .ky-crumb {
  padding-top: clamp(0.9rem, 3vw, 1.6rem);
}

.ab-hero {
  padding-top: clamp(1rem, 3.5vw, 2.2rem);
}

.ab-hero__grid {
  display: grid;
  gap: var(--ab-gap);
}

.ab-hero__copy {
  max-width: 62ch;
}

.ab-hero__p {
  color: rgba(244, 239, 228, 0.78);
  font-size: 1rem;
  max-width: 56ch;
}

.ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.ab-hero__aside {
  display: grid;
  gap: 1rem;
}

.ab-figure {
  margin: 0;
}

.page-about .ab-figure .ky-figure__media {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--ab-rule-night);
  box-shadow: var(--ky-shadow-panel);
}

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

.page-about .ab-figure .ky-figure__cap {
  margin-top: 0.55rem;
  color: var(--ky-mist);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.ab-slice {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.ab-slice__item {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding: 0.55rem 0.85rem;
  border-left: 1px solid var(--ab-rule-night);
  background: linear-gradient(90deg, rgba(201, 169, 106, 0.10), transparent 72%);
}

.ab-slice__num {
  flex: 0 0 auto;
  min-width: 5.6rem;
  color: var(--ky-teal);
  font-size: 1rem;
}

.ab-slice__label {
  color: var(--ky-mist);
  font-size: 0.88rem;
  line-height: 1.55;
}

/* ---------- 页内索引 ---------- */
.ab-index {
  margin-top: clamp(1.4rem, 4vw, 2.4rem);
}

.ab-index__list {
  list-style: none;
  margin: 0;
  padding: 0.6rem 0;
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  border-top: 1px solid var(--ab-rule-night);
  border-bottom: 1px solid var(--ab-rule-night);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.ab-index__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  padding: 0.45rem 0.85rem;
  font-size: 0.88rem;
  color: var(--ky-cream);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: background 0.22s var(--ky-ease), border-color 0.22s var(--ky-ease), color 0.22s var(--ky-ease);
}

.ab-index__num {
  color: var(--ky-sand);
  font-size: 0.74rem;
}

.ab-index__link:hover,
.ab-index__link:focus-visible {
  border-color: var(--ab-rule-night);
  background: rgba(43, 179, 163, 0.12);
}

/* ---------- 章节骨架 ---------- */
.ab-sec {
  padding: clamp(2.2rem, 6.5vw, 4.4rem) 0 0;
}

.ab-stack {
  display: grid;
  gap: 1rem;
}

.ab-stack__aside {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}

.ab-stack__body {
  max-width: 76ch;
}

.ab-head {
  max-width: 62ch;
  margin-bottom: clamp(1.2rem, 4vw, 2rem);
}

.ab-head .ky-index {
  display: block;
  margin-bottom: 0.45rem;
}

.ab-head__lead {
  color: var(--ky-mist);
  font-size: 1rem;
  margin-top: 0.7rem;
}

/* ---------- 奶油画板 ---------- */
.ab-panel-cream {
  background: var(--ky-cream);
  color: var(--ky-ink);
  border: 1px solid rgba(201, 169, 106, 0.42);
  border-radius: var(--ab-radius);
  box-shadow: var(--ky-shadow-panel);
  padding: clamp(1.2rem, 4.2vw, 2.4rem);
}

.ab-panel-cream p {
  color: rgba(30, 26, 22, 0.82);
}

.ab-facts {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.ab-facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.55rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--ab-rule-ink);
  font-size: 0.92rem;
  color: rgba(30, 26, 22, 0.8);
}

.ab-facts .ky-mono {
  color: var(--ky-sand-ink);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* ---------- 服务对象卡片 ---------- */
.ab-audience__grid {
  display: grid;
  gap: 1rem;
}

.ab-card {
  background: var(--ky-cream);
  color: var(--ky-ink);
  border: 1px solid rgba(201, 169, 106, 0.4);
  border-radius: var(--ab-radius);
  box-shadow: var(--ky-shadow-soft);
  padding: clamp(1.1rem, 3.4vw, 1.7rem);
  transition: transform 0.26s var(--ky-ease), box-shadow 0.26s var(--ky-ease);
}

.ab-card:hover,
.ab-card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--ky-shadow-panel);
}

.ab-card__tag {
  margin: 0 0 0.55rem;
  color: var(--ky-sand-ink);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.ab-card p {
  color: rgba(30, 26, 22, 0.8);
  font-size: 0.94rem;
}

.ab-card h3 + p {
  margin-bottom: 0;
}

/* ---------- 团队标签页 ---------- */
.ab-tabs {
  margin-top: 1.4rem;
}

.ab-tabs__nav {
  display: flex;
  gap: 0.35rem;
  overflow-x: auto;
  padding-bottom: 0.4rem;
  -webkit-overflow-scrolling: touch;
}

.ab-tabs__tab {
  flex: 0 0 auto;
  cursor: pointer;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--ab-rule-ink);
  color: rgba(30, 26, 22, 0.82);
  font-size: 0.86rem;
  line-height: 1.4;
  user-select: none;
  transition: background 0.2s var(--ky-ease), color 0.2s var(--ky-ease), border-color 0.2s var(--ky-ease);
}

.ab-tabs__tab:hover {
  border-color: var(--ky-sand);
}

.ab-tabs__panels {
  margin-top: 1rem;
}

.ab-tabs__panel {
  display: none;
}

.ab-tabs__panel p {
  font-size: 0.96rem;
}

.ab-tabs__meta {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0.9rem 0 0;
  border-top: 1px solid var(--ab-rule-ink);
  display: grid;
  gap: 0.45rem;
  font-size: 0.88rem;
  color: rgba(30, 26, 22, 0.76);
}

.ab-tabs__meta li {
  position: relative;
  padding-left: 0.95rem;
}

.ab-tabs__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ky-teal);
}

#ab-team-product:checked ~ .ab-tabs__panels > #ab-panel-product,
#ab-team-data:checked ~ .ab-tabs__panels > #ab-panel-data,
#ab-team-front:checked ~ .ab-tabs__panels > #ab-panel-front,
#ab-team-ops:checked ~ .ab-tabs__panels > #ab-panel-ops {
  display: block;
}

#ab-team-product:checked ~ .ab-tabs__nav [for="ab-team-product"],
#ab-team-data:checked ~ .ab-tabs__nav [for="ab-team-data"],
#ab-team-front:checked ~ .ab-tabs__nav [for="ab-team-front"],
#ab-team-ops:checked ~ .ab-tabs__nav [for="ab-team-ops"] {
  background: var(--ky-ink);
  color: var(--ky-cream);
  border-color: var(--ky-ink);
}

#ab-team-product:focus-visible ~ .ab-tabs__nav [for="ab-team-product"],
#ab-team-data:focus-visible ~ .ab-tabs__nav [for="ab-team-data"],
#ab-team-front:focus-visible ~ .ab-tabs__nav [for="ab-team-front"],
#ab-team-ops:focus-visible ~ .ab-tabs__nav [for="ab-team-ops"] {
  outline: 2px solid var(--ky-teal);
  outline-offset: 2px;
}

.ab-team__figure {
  margin-top: clamp(1.4rem, 4vw, 2.2rem);
}

/* ---------- 时间线 ---------- */
.ab-timeline__grid {
  display: grid;
  gap: var(--ab-gap);
  margin-top: clamp(1rem, 3vw, 1.6rem);
}

.ab-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.5rem;
  position: relative;
}

.ab-timeline__list::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: var(--ab-rule-night);
}

.ab-timeline__item {
  position: relative;
  padding-bottom: clamp(1.4rem, 4vw, 2.1rem);
}

.ab-timeline__item:last-child {
  padding-bottom: 0;
}

.ab-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.5rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: var(--ky-night);
  border: 1px solid var(--ky-sand);
  box-shadow: 0 0 0 3px rgba(11, 27, 43, 0.92);
}

.ab-timeline__item--now::before {
  background: var(--ky-teal);
  border-color: var(--ky-teal);
  box-shadow: 0 0 0 4px rgba(43, 179, 163, 0.2);
}

.ab-timeline__year {
  display: block;
  color: var(--ky-sand);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}

.ab-timeline__item h3 {
  color: var(--ky-white);
}

.ab-timeline__item p {
  margin: 0;
  color: var(--ky-mist);
  font-size: 0.94rem;
}

.ab-figure--slant .ky-figure__media {
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
  border-radius: 0;
}

/* ---------- 服务能力 ---------- */
.ab-cap__list {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
}

.ab-cap__item {
  display: grid;
  gap: 0.3rem;
  padding: 1.05rem 0;
  border-top: 1px solid var(--ab-rule-ink);
}

.ab-cap__item p {
  margin: 0;
  font-size: 0.94rem;
}

.ab-cap__num {
  color: var(--ky-sand-ink);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.ab-legend {
  display: grid;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

.ab-legend__item {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--ab-rule-ink);
  border-radius: 14px;
}

.ab-legend__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-top: 0.4rem;
}

.ab-legend__dot--teal { background: var(--ky-teal); }
.ab-legend__dot--orange { background: var(--ky-orange); }
.ab-legend__dot--sand { background: var(--ky-sand); }

.ab-legend__text {
  font-size: 0.86rem;
  line-height: 1.55;
  color: rgba(30, 26, 22, 0.78);
}

.ab-legend__text b {
  display: block;
  color: var(--ky-ink);
  font-size: 0.92rem;
  font-weight: 600;
  margin-bottom: 0.1rem;
}

/* ---------- 联系引导 ---------- */
.ab-cta {
  padding-top: clamp(2.4rem, 7vw, 4.4rem);
}

.ab-cta__inner {
  border: 1px solid var(--ab-rule-night);
  border-radius: var(--ab-radius);
  padding: clamp(1.4rem, 5vw, 3rem);
  background:
    linear-gradient(135deg, rgba(43, 179, 163, 0.16) 0%, rgba(240, 90, 40, 0.12) 62%, rgba(11, 27, 43, 0) 100%);
}

.ab-cta__inner .ky-index {
  display: block;
  margin-bottom: 0.5rem;
}

.ab-cta__lead {
  max-width: 56ch;
  color: rgba(244, 239, 228, 0.8);
}

.ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.4rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .ab-audience__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ab-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .ab-cap__item {
    grid-template-columns: 3.4rem minmax(0, 1fr) minmax(0, 1.5fr);
    align-items: baseline;
    gap: 1rem;
  }

  .ab-cap__item h3 {
    margin-bottom: 0;
  }
}

@media (min-width: 900px) {
  .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
    align-items: start;
    gap: clamp(1.6rem, 4vw, 3.2rem);
  }

  .ab-hero__aside {
    margin-top: 3.2rem;
  }

  .ab-stack {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .ab-stack__aside {
    flex-direction: column;
    gap: 0.3rem;
    padding-top: 0.4rem;
  }

  .ab-timeline__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .ab-team__figure {
    margin-top: clamp(1.6rem, 4vw, 2.6rem);
    max-width: 900px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-card,
  .page-about .ab-index__link,
  .page-about .ab-tabs__tab {
    transition: none;
  }

  .page-about .ab-card:hover,
  .page-about .ab-card:focus-within {
    transform: none;
  }
}