.page-about {
  background: var(--ink-purple);
  color: var(--cream);
  overflow-x: hidden;
}

.page-about .section {
  padding-block: clamp(48px, 7vw, 100px);
}

.page-about .section > * {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ========== 首屏 ========== */
.page-about .ab-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) var(--gutter) clamp(56px, 8vw, 96px);
  background:
    radial-gradient(ellipse 60% 50% at 82% 12%, rgba(61, 225, 255, 0.12), transparent 62%),
    radial-gradient(ellipse 55% 45% at 12% 88%, rgba(255, 61, 190, 0.1), transparent 60%),
    var(--ink-purple);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  max-width: var(--shell);
  margin: 0 auto;
  align-items: start;
}

.page-about .ab-hero__story .eyebrow {
  margin-top: 22px;
}

.page-about .ab-hero__story h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.6vw, 4rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 16px 0 20px;
  color: var(--cream);
}

.page-about .ab-hero__story .lede {
  font-size: clamp(0.98rem, 1.15vw, 1.1rem);
  line-height: 1.78;
  color: var(--mauve);
  max-width: 48ch;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .ab-hero__aside {
  display: grid;
  gap: 16px;
}

.page-about .ab-hero__media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--plum);
  border: 1px solid var(--glass);
}

.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-hero__caption {
  padding: 12px 16px;
  font-size: 0.84rem;
  color: var(--mauve);
  border-top: 1px solid var(--glass);
}

.page-about .ab-index {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
  gap: 8px;
}

.page-about .ab-index__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--glass-soft);
  border: 1px solid var(--glass);
  color: var(--cream);
  text-decoration: none;
  font-size: 0.86rem;
  transition: background 220ms var(--ease), border-color 220ms var(--ease), transform 220ms var(--ease);
}

.page-about .ab-index__item:hover,
.page-about .ab-index__item:focus-visible {
  background: rgba(61, 225, 255, 0.12);
  border-color: var(--cyan);
  transform: translateX(2px);
  outline: none;
}

.page-about .ab-index__num {
  font-size: 0.72rem;
  color: var(--gold);
  letter-spacing: 0.06em;
}

/* ========== 历程 ========== */
.page-about .ab-journey {
  background: var(--ink-purple);
}

.page-about .ab-journey__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  color: var(--cream);
}

.page-about .ab-journey__lede {
  color: var(--mauve);
  line-height: 1.75;
  max-width: 56ch;
}

.page-about .ab-timeline {
  list-style: none;
  padding: 24px 0 0;
  margin: 40px 0 0;
  display: grid;
  gap: 18px;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 30px;
  bottom: 30px;
  width: 2px;
  background: linear-gradient(var(--cyan), var(--magenta), var(--gold));
  opacity: 0.55;
}

.page-about .ab-stage {
  position: relative;
  padding-left: 52px;
}

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 26px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink-purple);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px var(--ink-purple), 0 0 18px rgba(61, 225, 255, 0.35);
  z-index: 1;
}

.page-about .ab-stage:nth-child(2)::before {
  border-color: var(--magenta);
  box-shadow: 0 0 0 4px var(--ink-purple), 0 0 18px rgba(255, 61, 190, 0.35);
}

.page-about .ab-stage:nth-child(3)::before {
  border-color: var(--gold);
  box-shadow: 0 0 0 4px var(--ink-purple), 0 0 18px rgba(242, 184, 75, 0.35);
}

.page-about .ab-stage__inner {
  background: rgba(36, 17, 38, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-stage__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 18px 20px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-stage__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-stage__head::marker {
  content: "";
}

.page-about .ab-stage__num {
  font-size: 0.74rem;
  color: var(--gold);
  padding: 4px 10px;
  background: rgba(242, 184, 75, 0.14);
  border-radius: 999px;
  white-space: nowrap;
  letter-spacing: 0.06em;
}

.page-about .ab-stage__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.06rem, 1.7vw, 1.4rem);
  font-weight: 800;
  color: var(--cream);
  flex: 1;
  line-height: 1.25;
}

.page-about .ab-stage__mark {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--glass-soft);
  border: 1px solid var(--glass);
  position: relative;
  flex-shrink: 0;
}

.page-about .ab-stage__mark::before,
.page-about .ab-stage__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
}

.page-about .ab-stage__mark::before {
  width: 10px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-about .ab-stage__mark::after {
  width: 2px;
  height: 10px;
  transform: translate(-50%, -50%);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-about .ab-stage__inner[open] .ab-stage__mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-about .ab-stage__body {
  padding: 0 18px 22px 20px;
  border-top: 1px solid var(--glass);
  padding-top: 16px;
}

.page-about .ab-stage__body p {
  color: var(--mauve);
  line-height: 1.75;
  margin: 0 0 14px;
  font-size: 0.95rem;
}

.page-about .ab-stage__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.page-about .ab-stage__list li {
  position: relative;
  padding-left: 18px;
  color: var(--cream);
  font-size: 0.9rem;
  line-height: 1.6;
}

.page-about .ab-stage__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ========== 团队 ========== */
.page-about .ab-team {
  background: var(--paper);
  color: var(--ink);
}

.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .ab-team h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 12px 0 18px;
  color: var(--ink);
}

.page-about .ab-team__copy > p {
  color: var(--ink-soft);
  line-height: 1.78;
}

.page-about .ab-roles__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 20px;
}

.page-about .ab-roles__filter .filter-btn {
  padding: 8px 14px;
  border-radius: 999px;
  background: transparent;
  border: 1px solid rgba(30, 16, 24, 0.18);
  color: var(--ink-soft);
  font-size: 0.84rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 200ms var(--ease), color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .ab-roles__filter .filter-btn:hover,
.page-about .ab-roles__filter .filter-btn:focus-visible {
  border-color: var(--ink-purple);
  color: var(--ink);
  outline: none;
}

.page-about .ab-roles__filter .filter-btn[aria-pressed="true"] {
  background: var(--ink-purple);
  color: var(--cream);
  border-color: var(--ink-purple);
}

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

.page-about .ab-role {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px 18px;
  background: var(--paper-warm);
  border-radius: 14px;
  border-left: 4px solid var(--cyan);
}

.page-about .ab-role[data-tags*="规则校对"] {
  border-left-color: var(--magenta);
}

.page-about .ab-role[data-tags*="客服顾问"] {
  border-left-color: var(--gold);
}

.page-about .ab-role__count {
  font-size: 2rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
  flex-shrink: 0;
}

.page-about .ab-role h3 {
  margin: 0 0 4px;
  font-size: 1rem;
  color: var(--ink);
  font-weight: 700;
}

.page-about .ab-role p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .ab-team [data-filter-empty] {
  margin-top: 16px;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.page-about .ab-team [data-filter-empty][hidden] {
  display: none;
}

.page-about .ab-team__media {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .ab-team__frame {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-purple);
  border: 1px solid rgba(30, 16, 24, 0.12);
}

.page-about .ab-team__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-team__caption {
  padding: 12px 16px;
  font-size: 0.82rem;
  color: var(--ink-soft);
  background: var(--paper-warm);
}

.page-about .ab-flow {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-flow li {
  flex: 1 1 140px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--ink-purple);
  color: var(--cream);
  font-size: 0.86rem;
}

.page-about .ab-flow li .mono {
  color: var(--gold);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
}

/* ========== 玩法分类 ========== */
.page-about .ab-library {
  background: var(--ink-purple);
}

.page-about .ab-library__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  color: var(--cream);
}

.page-about .ab-library__head > p {
  color: var(--mauve);
  line-height: 1.75;
  max-width: 60ch;
}

.page-about .ab-cats {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-cat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  border-radius: 14px;
  background: var(--plum);
  border: 1px solid var(--glass);
  color: var(--cream);
  position: relative;
  overflow: hidden;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .ab-cat::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  opacity: 0.85;
}

.page-about .ab-cat--1::after { background: var(--cyan); }
.page-about .ab-cat--2::after { background: var(--magenta); }
.page-about .ab-cat--3::after { background: var(--gold); }
.page-about .ab-cat--4::after { background: var(--mint); }
.page-about .ab-cat--5::after { background: var(--signal); }
.page-about .ab-cat--6::after { background: var(--cyan); }
.page-about .ab-cat--7::after { background: var(--magenta); }
.page-about .ab-cat--8::after { background: var(--gold); }

.page-about .ab-cat:hover,
.page-about .ab-cat:focus-within {
  transform: translateY(-3px);
  border-color: var(--cyan);
}

.page-about .ab-cat__idx {
  font-size: 0.7rem;
  color: var(--gold);
  letter-spacing: 0.08em;
}

.page-about .ab-cat__name {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-about .ab-library__stat {
  margin-top: 28px;
  padding: clamp(24px, 4vw, 40px);
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

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

.page-about .ab-library__big-num {
  font-size: clamp(3rem, 6vw, 4.6rem);
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-purple);
  letter-spacing: -0.04em;
}

.page-about .ab-library__big-label {
  font-size: 0.8rem;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
}

.page-about .ab-library__stat > p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.75;
  font-size: 0.95rem;
}

.page-about .ab-library__stat .btn {
  justify-self: start;
}

/* ========== 西藏线下 ========== */
.page-about .ab-tibet {
  background: var(--plum);
}

.page-about .ab-tibet__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-about .ab-tibet__copy h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  color: var(--cream);
}

.page-about .ab-tibet__copy > p {
  color: var(--mauve);
  line-height: 1.78;
}

.page-about .ab-tibet__stats {
  margin: 22px 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .ab-tibet__stats > div {
  padding: 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass);
}

.page-about .ab-tibet__stats dt {
  font-size: 0.78rem;
  color: var(--mauve);
  margin-bottom: 6px;
}

.page-about .ab-tibet__stats dd {
  margin: 0;
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.05;
}

.page-about .ab-tibet__addr {
  color: var(--cream);
  font-size: 0.92rem;
  line-height: 1.7;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 3px solid var(--gold);
  border-radius: 6px;
  margin-bottom: 22px;
}

.page-about .ab-tibet__media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-purple);
  border: 1px solid var(--glass);
}

.page-about .ab-tibet__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .ab-tibet__caption {
  padding: 12px 16px;
  font-size: 0.84rem;
  color: var(--mauve);
  border-top: 1px solid var(--glass);
}

/* ========== 合作与荣誉 ========== */
.page-about .ab-partners {
  background: var(--paper);
  color: var(--ink);
}

.page-about .ab-partners__head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.6rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  color: var(--ink);
}

.page-about .ab-partners__head > p {
  color: var(--ink-soft);
  line-height: 1.78;
  max-width: 62ch;
}

.page-about .ab-partners__list {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-partners__list > li {
  padding: 22px;
  background: var(--paper-warm);
  border-radius: 16px;
  border-bottom: 4px solid var(--cyan);
}

.page-about .ab-partners__list > li:nth-child(2) {
  border-bottom-color: var(--magenta);
}

.page-about .ab-partners__list > li:nth-child(3) {
  border-bottom-color: var(--gold);
}

.page-about .ab-partners__num {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1;
}

.page-about .ab-partners__list h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  color: var(--ink);
  font-weight: 700;
}

.page-about .ab-partners__list p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

.page-about .ab-partners__award {
  margin-top: 22px;
  padding: 20px 24px;
  background: var(--ink-purple);
  color: var(--cream);
  border-radius: var(--radius);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .ab-partners__award p {
  margin: 0;
  color: var(--cream);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ========== 回访提示 ========== */
.page-about .ab-recall {
  background: var(--ink-purple);
}

.page-about .ab-recall__inner {
  padding: clamp(26px, 4vw, 52px);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 88% 18%, rgba(255, 61, 190, 0.16), transparent 60%),
    radial-gradient(circle at 8% 82%, rgba(61, 225, 255, 0.12), transparent 60%),
    rgba(36, 17, 38, 0.62);
  border: 1px solid var(--glass);
}

.page-about .ab-recall__tag {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 12px;
}

.page-about .ab-recall h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.6vw, 2.1rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--cream);
  margin: 0 0 14px;
}

.page-about .ab-recall p {
  color: var(--mauve);
  line-height: 1.78;
  margin: 0 0 22px;
  max-width: 60ch;
}

.page-about .ab-recall__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ========== 响应式 ========== */
@media (min-width: 640px) {
  .page-about .ab-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .ab-partners__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .page-about .ab-timeline::before {
    left: 36px;
  }

  .page-about .ab-stage {
    padding-left: 88px;
  }

  .page-about .ab-stage::before {
    left: 27px;
  }

  .page-about .ab-stage__head {
    padding: 22px 24px 22px 26px;
  }

  .page-about .ab-stage__body {
    padding: 18px 24px 26px 26px;
  }

  .page-about .ab-library__stat {
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 32px;
  }

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

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(40px, 5vw, 72px);
  }

  .page-about .ab-team__grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .ab-tibet__grid {
    grid-template-columns: 5fr 7fr;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__item,
  .page-about .ab-cat,
  .page-about .ab-stage__mark::after,
  .page-about .ab-roles__filter .filter-btn {
    transition: none;
  }

  .page-about .ab-index__item:hover,
  .page-about .ab-cat:hover {
    transform: none;
  }
}
<<<END>>>