.page-about {
  --ab-rail: 210px;
  --ab-node-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(40px, 7vw, 84px) 0 clamp(32px, 5vw, 60px);
  background:
    radial-gradient(1100px 480px at 84% -12%, rgba(217, 164, 65, .16), transparent 60%),
    radial-gradient(760px 420px at 6% 108%, rgba(69, 214, 214, .12), transparent 62%),
    linear-gradient(158deg, var(--wb-deep) 0%, var(--wb-midnight) 100%);
  border-bottom: 1px solid var(--wb-line);
  overflow: hidden;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 auto;
  width: min(46vw, 520px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--wb-gold-deep), var(--wb-gold));
  opacity: .7;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  margin-top: 20px;
}

.page-about .ab-h1 {
  margin: 8px 0 0;
  font-family: var(--wb-font-display);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.06;
  text-wrap: balance;
}

.page-about .ab-lead {
  max-width: 56ch;
  margin-top: 18px;
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__figure {
  margin: 0;
}

.page-about .ab-media {
  border-radius: 0;
  overflow: hidden;
  border: 1px solid var(--wb-line);
  clip-path: polygon(0 0, calc(100% - var(--wb-cut)) 0, 100% var(--wb-cut), 100% 100%, var(--wb-cut) 100%, 0 calc(100% - var(--wb-cut)));
}

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

.page-about .ab-hero__caption {
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--wb-text-dim);
}

/* ---------- 数字铭牌 ---------- */
.page-about .ab-statstrip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  background: var(--wb-line);
  border: 1px solid var(--wb-line);
  border-radius: 0;
  clip-path: polygon(0 0, calc(100% - var(--wb-cut)) 0, 100% var(--wb-cut), 100% 100%, 0 100%);
}

.page-about .ab-stat {
  padding: 16px 16px 18px;
  background: linear-gradient(180deg, rgba(18, 43, 64, .92), rgba(11, 27, 43, .96));
}

.page-about .ab-stat dt {
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--wb-mist);
}

.page-about .ab-stat dd {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--wb-text-dim);
}

.page-about .ab-stat__num {
  margin-right: 6px;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1;
  color: var(--wb-gold);
}

/* ---------- 主体双栏 ---------- */
.page-about .ab-body {
  padding: clamp(36px, 6vw, 76px) 0 clamp(48px, 7vw, 96px);
  background:
    linear-gradient(180deg, var(--wb-deep) 0%, var(--wb-ink) 46%, var(--wb-deep) 100%);
}

.page-about .ab-body__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

/* ---------- 书签式侧栏 ---------- */
.page-about .ab-side {
  align-self: start;
}

.page-about .ab-side__title {
  margin: 0 0 12px;
  font-family: var(--wb-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--wb-gold);
}

.page-about .ab-side__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .ab-side__link {
  position: relative;
  display: block;
  padding: 9px 16px 9px 14px;
  font-size: 14px;
  white-space: nowrap;
  color: var(--wb-text-dim);
  text-decoration: none;
  background: rgba(18, 43, 64, .72);
  border-left: 3px solid var(--wb-line-gold);
  border-radius: 0 3px 3px 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: color var(--wb-dur) var(--wb-ease), background var(--wb-dur) var(--wb-ease), border-color var(--wb-dur) var(--wb-ease);
}

.page-about .ab-side__link:hover,
.page-about .ab-side__link:focus-visible {
  color: var(--wb-gold-light);
  background: rgba(217, 164, 65, .14);
  border-left-color: var(--wb-gold);
}

/* ---------- 章节 ---------- */
.page-about .ab-read {
  min-width: 0;
}

.page-about .ab-chapter {
  padding: clamp(28px, 4vw, 44px) 0;
  border-top: 1px solid var(--wb-line);
}

.page-about .ab-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .ab-chapter__index {
  display: inline-block;
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--wb-coral);
}

.page-about .ab-chapter__lead {
  max-width: 62ch;
  margin-bottom: 26px;
}

.page-about .ab-chapter__cols {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: 18px;
}

/* ---------- 价格侧卡 ---------- */
.page-about .ab-aside-card {
  align-self: start;
  padding: 22px 22px 24px;
  background: linear-gradient(165deg, rgba(217, 164, 65, .13), rgba(8, 18, 28, .82));
  border: 1px solid var(--wb-line-gold);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .ab-aside-card__label {
  margin: 0;
  font-family: var(--wb-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--wb-gold);
}

.page-about .ab-aside-card__text {
  margin: 12px 0 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--wb-text);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  position: relative;
  list-style: none;
  margin: 8px 0 0;
  padding: 0 0 0 30px;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--wb-gold) 0%, rgba(217, 164, 65, .4) 42%, rgba(69, 214, 214, .28) 100%);
}

.page-about .ab-node {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .ab-node[hidden] {
  display: none;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: var(--ab-node-size);
  height: var(--ab-node-size);
  background: var(--wb-deep);
  border: 2px solid var(--wb-gold);
  transform: rotate(45deg);
  transition: background var(--wb-dur) var(--wb-ease), border-color var(--wb-dur) var(--wb-ease);
}

.page-about .ab-node:hover::before {
  background: var(--wb-gold);
  border-color: var(--wb-gold-light);
}

.page-about .ab-node__year {
  display: inline-block;
  padding: 2px 9px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--wb-gold-light);
  background: rgba(217, 164, 65, .12);
  border: 1px solid var(--wb-line-gold);
}

.page-about .ab-node__title {
  margin: 10px 0 8px;
}

.page-about .ab-node__text {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--wb-text-dim);
}

/* ---------- 配图 ---------- */
.page-about .ab-figure {
  margin: clamp(24px, 4vw, 38px) 0 0;
}

.page-about .ab-figure--team {
  margin-top: 0;
}

.page-about .ab-figure__caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--wb-text-dim);
}

/* ---------- 折叠面板 ---------- */
.page-about .ab-folds {
  margin-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--wb-line);
}

.page-about .ab-fold {
  border-bottom: 1px solid var(--wb-line);
}

.page-about .ab-fold__head {
  position: relative;
  padding: 16px 40px 16px 0;
  font-family: var(--wb-font-display);
  font-size: clamp(17px, 2.2vw, 20px);
  font-weight: 600;
  color: var(--wb-text);
  cursor: pointer;
  list-style: none;
  transition: color var(--wb-dur) var(--wb-ease);
}

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

.page-about .ab-fold__head::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--wb-gold);
  border-bottom: 2px solid var(--wb-gold);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--wb-dur) var(--wb-ease);
}

.page-about .ab-fold[open] .ab-fold__head {
  color: var(--wb-gold-light);
}

.page-about .ab-fold[open] .ab-fold__head::after {
  transform: translateY(-30%) rotate(-135deg);
}

.page-about .ab-fold__body {
  padding: 0 0 20px;
}

.page-about .ab-fold__body p {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--wb-text-dim);
}

/* ---------- 生态 Bento ---------- */
.page-about .ab-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 22px;
}

.page-about .ab-eco__cell {
  padding: 22px 20px 24px;
  background: rgba(18, 43, 64, .78);
  border: 1px solid var(--wb-line);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-about .ab-eco__cell--award {
  background: linear-gradient(160deg, rgba(255, 107, 74, .14), rgba(18, 43, 64, .9));
  border-color: rgba(255, 107, 74, .38);
}

.page-about .ab-eco__num {
  margin: 0;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  color: var(--wb-gold);
}

.page-about .ab-eco__cell h3 {
  margin: 10px 0 8px;
}

.page-about .ab-eco__cell p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--wb-text-dim);
}

.page-about .ab-eco__cell .wb-tag {
  margin: 0 0 8px;
}

/* ---------- 收尾 ---------- */
.page-about .ab-next {
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(26px, 4vw, 42px);
  background:
    radial-gradient(620px 300px at 92% 0%, rgba(69, 214, 214, .14), transparent 66%),
    linear-gradient(150deg, rgba(217, 164, 65, .12), rgba(8, 18, 28, .95));
  border: 1px solid var(--wb-line-gold);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-about .ab-next__text {
  max-width: 62ch;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--wb-text-dim);
}

.page-about .ab-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .ab-statstrip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-chapter__cols {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-chapter__cols--reverse {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  }

  .page-about .ab-figure--team {
    margin-top: 0;
  }

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

  .page-about .ab-eco__cell--wide {
    grid-column: span 2;
  }
}

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

@media (min-width: 1000px) {
  .page-about .ab-body__grid {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-side {
    position: sticky;
    top: 128px;
  }

  .page-about .ab-side__list {
    display: block;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .ab-side__list li + li {
    margin-top: 6px;
  }

  .page-about .ab-side__link {
    white-space: normal;
  }

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

  .page-about .ab-eco__cell--wide {
    grid-column: span 2;
  }

  .page-about .ab-eco__cell--award {
    grid-column: span 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-side__link,
  .page-about .ab-node::before,
  .page-about .ab-fold__head::after {
    transition: none;
  }
}