.page-about {
  --ab-soft: rgba(244, 237, 225, 0.72);
  --ab-dim: rgba(244, 237, 225, 0.46);
  --ab-hair: rgba(201, 183, 156, 0.2);
  --ab-hair-mid: rgba(201, 183, 156, 0.4);
  isolation: isolate;
  color: var(--c-paper);
  padding-bottom: clamp(40px, 7vw, 90px);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumbs {
  padding-top: clamp(18px, 3.5vw, 34px);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--ab-dim);
}

.page-about .ab-crumbs a {
  color: var(--ab-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-crumbs a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* ---------- 刊头 ---------- */
.page-about .ab-masthead {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 5vw, 52px) 0 clamp(28px, 5vw, 52px);
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(46% 60% at 18% 24%, rgba(53, 240, 208, 0.16), transparent 68%),
    radial-gradient(40% 54% at 88% 6%, rgba(255, 122, 47, 0.14), transparent 70%),
    radial-gradient(70% 60% at 62% 108%, rgba(22, 32, 61, 0.9), transparent 74%);
}

.page-about .ab-masthead__title {
  margin: 0.28em 0 0.4em;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.5rem, 8.4vw, 5.6rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-about .ab-masthead__lede {
  max-width: 62ch;
  color: var(--ab-soft);
}

.page-about .ab-masthead__stats {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}

.page-about .ab-masthead__stats > li {
  background: var(--c-void);
  padding: 16px 16px 18px;
}

.page-about .ab-masthead__stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3.6vw, 2.2rem);
  line-height: 1.1;
  color: var(--c-cyan);
  letter-spacing: 0.01em;
}

.page-about .ab-masthead__stats > li:nth-child(2) .stat__num {
  color: var(--c-orange);
}

.page-about .ab-masthead__stats .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--ab-soft);
}

/* ---------- 章节索引 ---------- */
.page-about .ab-jump {
  display: flex;
  flex-wrap: nowrap;
  gap: 1px;
  margin: clamp(20px, 3.4vw, 34px) 0 0;
  border: 1px solid var(--ab-hair);
  background: var(--ab-hair);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .ab-jump::-webkit-scrollbar {
  display: none;
}

.page-about .ab-jump a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 15px;
  background: var(--c-void);
  color: var(--ab-soft);
  font-size: 0.85rem;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .ab-jump a:hover,
.page-about .ab-jump a:focus-visible {
  background: var(--c-cabin);
  color: var(--c-cyan);
}

.page-about .ab-jump__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--c-orange);
}

/* ---------- 通用节奏 ---------- */
.page-about .ab-position,
.page-about .ab-timeline,
.page-about .ab-team,
.page-about .ab-flow,
.page-about .ab-principle,
.page-about .ab-partner,
.page-about .ab-next {
  padding-block: clamp(34px, 6vw, 72px);
  scroll-margin-top: calc(var(--entry-h, 48px) + 16px);
}

.page-about .ab-position:target,
.page-about .ab-timeline:target,
.page-about .ab-team:target,
.page-about .ab-flow:target,
.page-about .ab-principle:target,
.page-about .ab-partner:target {
  box-shadow: inset 3px 0 0 var(--c-cyan);
}

.page-about .ab-num {
  margin-right: 8px;
  font-family: var(--font-mono);
  color: var(--c-orange);
}

.page-about .ab-position .h2,
.page-about .ab-timeline .h2,
.page-about .ab-team .h2,
.page-about .ab-flow .h2,
.page-about .ab-principle .h2,
.page-about .ab-partner .h2,
.page-about .ab-next .h2 {
  margin-top: 0.35em;
}

.page-about .lede {
  max-width: 58ch;
  color: var(--ab-soft);
}

/* ---------- 01 品牌定位 ---------- */
.page-about .ab-position__body > p {
  max-width: 56ch;
  color: var(--ab-soft);
}

.page-about .ab-axis {
  list-style: none;
  margin: clamp(20px, 3.2vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-axis > li {
  position: relative;
  padding: 14px 16px 16px 18px;
  background: var(--c-cabin);
  border-left: 3px solid var(--c-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-about .ab-axis > li:nth-child(2) {
  border-left-color: var(--c-orange);
}

.page-about .ab-axis > li:nth-child(3) {
  border-left-color: var(--c-line);
}

.page-about .ab-axis > li:hover {
  background: var(--c-panel);
  transform: translateX(3px);
}

.page-about .ab-axis__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-about .ab-axis > li:nth-child(2) .ab-axis__k {
  color: var(--c-orange);
}

.page-about .ab-axis > li:nth-child(3) .ab-axis__k {
  color: var(--c-line);
}

.page-about .ab-axis__v {
  margin: 8px 0 0;
  color: var(--ab-soft);
  font-size: 0.95rem;
}

.page-about .ab-position__note {
  margin-top: clamp(18px, 3vw, 26px);
  padding-left: 14px;
  border-left: 1px solid var(--ab-hair-mid);
  color: var(--ab-dim);
}

.page-about .ab-position__media {
  margin: clamp(22px, 4vw, 0) 0 0;
}

.page-about .ab-position__media img {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

/* ---------- 02 赛季时间轴 ---------- */
.page-about .ab-timeline__head {
  row-gap: clamp(18px, 3vw, 26px);
}

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

.page-about .ab-track {
  position: relative;
  list-style: none;
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding: 0 0 0 30px;
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(
    180deg,
    rgba(53, 240, 208, 0.9),
    rgba(53, 240, 208, 0.16) 62%,
    rgba(255, 122, 47, 0.5)
  );
}

.page-about .ab-track__item {
  position: relative;
  padding-bottom: 26px;
}

.page-about .ab-track__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--c-void);
  border: 2px solid var(--c-cyan);
  transform: rotate(45deg);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.page-about .ab-track__item:last-child::before {
  border-color: var(--c-orange);
}

.page-about .ab-track__side {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .ab-track__year {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 3.4vw, 1.6rem);
  letter-spacing: 0.02em;
  color: var(--c-orange);
}

.page-about .ab-track__note {
  margin: 0;
  color: var(--ab-dim);
}

.page-about .ab-track__card {
  padding: 15px 17px 17px;
  background: var(--c-cabin);
  border: 1px solid var(--ab-hair);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-about .ab-track__item:hover .ab-track__card,
.page-about .ab-track__item:focus-within .ab-track__card {
  background: var(--c-panel);
  border-color: var(--c-cyan);
  transform: translateX(3px);
}

.page-about .ab-track__item:hover::before {
  background: var(--c-cyan);
}

.page-about .ab-track__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.4vw, 1.22rem);
  letter-spacing: 0.01em;
  color: var(--c-paper);
}

.page-about .ab-track__text {
  margin: 8px 0 0;
  color: var(--ab-soft);
  font-size: 0.94rem;
}

.page-about .ab-track__more {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--ab-hair);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  color: var(--c-cyan);
}

/* ---------- 03 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(22px, 4vw, 34px);
}

.page-about .ab-team__card {
  position: relative;
  padding: 20px 20px 22px;
  background: var(--c-cabin);
  border: 1px solid var(--ab-hair);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  outline: none;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-about .ab-team__card:hover,
.page-about .ab-team__card:focus-visible {
  background: var(--c-panel);
  border-color: var(--c-cyan);
  transform: translateY(-3px);
}

.page-about .ab-team__card--a {
  border-top: 3px solid var(--c-orange);
}

.page-about .ab-team__card--b {
  border-top: 3px solid var(--c-cyan);
}

.page-about .ab-team__card--c {
  border-top: 3px solid var(--c-line);
}

.page-about .ab-team__card--d {
  border-top: 3px solid var(--c-orange);
}

.page-about .ab-team__count {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 6vw, 3.1rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-cyan);
}

.page-about .ab-team__card--a .ab-team__count,
.page-about .ab-team__card--d .ab-team__count {
  color: var(--c-orange);
}

.page-about .ab-team__role {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.6vw, 1.32rem);
  letter-spacing: 0.02em;
  color: var(--c-paper);
}

.page-about .ab-team__brief {
  margin: 8px 0 0;
  color: var(--ab-soft);
  font-size: 0.94rem;
}

.page-about .ab-team__detail {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--ab-hair);
  font-size: 0.86rem;
  color: var(--ab-dim);
}

/* ---------- 04 内容生产 ---------- */
.page-about .ab-flow__steps {
  list-style: none;
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-flow__step {
  padding: 20px 20px 22px;
  background: var(--c-cabin);
  border: 1px solid var(--ab-hair);
  border-top: 3px solid var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-about .ab-flow__step:hover {
  background: var(--c-panel);
  transform: translateY(-3px);
}

.page-about .ab-flow__steps > li:nth-child(2) {
  border-top-color: var(--c-cyan);
}

.page-about .ab-flow__steps > li:nth-child(3) {
  border-top-color: var(--c-line);
}

.page-about .ab-flow__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--c-orange);
}

.page-about .ab-flow__steps > li:nth-child(2) .ab-flow__idx {
  color: var(--c-cyan);
}

.page-about .ab-flow__steps > li:nth-child(3) .ab-flow__idx {
  color: var(--c-line);
}

.page-about .ab-flow__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.08rem, 2.6vw, 1.35rem);
  letter-spacing: 0.02em;
  color: var(--c-paper);
}

.page-about .ab-flow__text {
  margin: 8px 0 0;
  color: var(--ab-soft);
  font-size: 0.94rem;
}

.page-about .ab-flow__time {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--ab-hair);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--c-cyan);
}

/* ---------- 05 服务原则 ---------- */
.page-about .ab-principle__list {
  list-style: none;
  margin: clamp(20px, 3.4vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}

.page-about .ab-principle__list > li {
  background: var(--c-void);
  padding: 18px 18px 20px;
}

.page-about .ab-principle__k {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  color: var(--c-orange);
}

.page-about .ab-principle__list > li:nth-child(2) .ab-principle__k {
  color: var(--c-cyan);
}

.page-about .ab-principle__list > li:nth-child(3) .ab-principle__k {
  color: var(--c-line);
}

.page-about .ab-principle__list p {
  margin: 8px 0 0;
  color: var(--ab-soft);
  font-size: 0.94rem;
}

.page-about .ab-principle__media {
  margin: clamp(22px, 4vw, 0) 0 0;
}

.page-about .ab-principle__media img {
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

/* ---------- 06 合作生态 ---------- */
.page-about .ab-partner__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .ab-partner__map-wrap {
  position: relative;
  padding: 10px;
  border: 1px solid var(--ab-hair);
  background:
    radial-gradient(60% 60% at 50% 50%, rgba(53, 240, 208, 0.08), transparent 70%),
    var(--c-void);
}

.page-about .ab-partner__map {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-partner__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}

.page-about .ab-partner__stats > li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  background: var(--c-void);
}

.page-about .ab-partner__num {
  flex: 0 0 auto;
  min-width: 3.4em;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3.2vw, 1.85rem);
  line-height: 1.1;
  color: var(--c-cyan);
}

.page-about .ab-partner__label {
  color: var(--ab-soft);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ---------- 下一步 ---------- */
.page-about .ab-next__inner {
  padding: clamp(24px, 4.5vw, 44px);
  background: linear-gradient(135deg, var(--c-cabin), var(--c-void) 62%);
  border: 1px solid var(--ab-hair);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-about .ab-next__inner p {
  max-width: 60ch;
  margin: 14px 0 0;
  color: var(--ab-soft);
}

.page-about .ab-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3.4vw, 30px);
}

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

/* ---------- 悬停展开：桌面端才收起 ---------- */
@media (hover: hover) and (pointer: fine) {
  .page-about .ab-track__more {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    overflow: hidden;
    opacity: 0;
    border-top-color: transparent;
    transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease,
      padding-top 0.3s ease;
  }

  .page-about .ab-track__item:hover .ab-track__more,
  .page-about .ab-track__item:focus-within .ab-track__more {
    max-height: 90px;
    margin-top: 10px;
    padding-top: 10px;
    opacity: 1;
    border-top-color: var(--ab-hair);
  }

  .page-about .ab-team__detail {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    overflow: hidden;
    opacity: 0;
    border-top-color: transparent;
    transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease,
      padding-top 0.3s ease;
  }

  .page-about .ab-team__card:hover .ab-team__detail,
  .page-about .ab-team__card:focus-visible .ab-team__detail,
  .page-about .ab-team__card:focus-within .ab-team__detail {
    max-height: 150px;
    margin-top: 12px;
    padding-top: 12px;
    opacity: 1;
    border-top-color: var(--ab-hair);
  }
}

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

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

  .page-about .ab-team__card--a,
  .page-about .ab-team__card--d {
    grid-column: span 2;
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .ab-position__media,
  .page-about .ab-principle__media {
    margin-top: 6px;
  }

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

  .page-about .ab-partner__body {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
    align-items: center;
  }

  /* 时间轴：左旁注 + 右卡片 */
  .page-about .ab-track {
    padding-left: 0;
  }

  .page-about .ab-track::before {
    left: 19%;
    top: 10px;
  }

  .page-about .ab-track__item {
    display: grid;
    grid-template-columns: 19% minmax(0, 1fr);
    column-gap: 0;
    padding-bottom: 30px;
  }

  .page-about .ab-track__item::before {
    left: 19%;
    top: 5px;
    transform: translateX(-50%) rotate(45deg);
  }

  .page-about .ab-track__side {
    display: block;
    margin-bottom: 0;
    padding-right: 26px;
    text-align: right;
  }

  .page-about .ab-track__note {
    margin-top: 6px;
  }

  .page-about .ab-track__card {
    margin-left: 26px;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-team__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .ab-team__card--a {
    grid-column: span 6;
  }

  .page-about .ab-team__card--b {
    grid-column: span 6;
  }

  .page-about .ab-team__card--c {
    grid-column: span 5;
  }

  .page-about .ab-team__card--d {
    grid-column: span 7;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-track__card,
  .page-about .ab-team__card,
  .page-about .ab-flow__step,
  .page-about .ab-axis > li,
  .page-about .ab-jump a {
    transition: none;
  }

  .page-about .ab-track__item:hover .ab-track__card,
  .page-about .ab-team__card:hover,
  .page-about .ab-flow__step:hover,
  .page-about .ab-axis > li:hover {
    transform: none;
  }
}