.page-about {
  --ab-body: #C3DBD1;
  --ab-card: rgba(7, 28, 22, 0.44);
  --ab-hair: rgba(232, 245, 240, 0.12);
  background: var(--night);
  color: var(--glass);
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .wrap {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 面包屑 ---------- */
.page-about .crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
}

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

.page-about .crumb a:hover,
.page-about .crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .crumb__sep {
  color: var(--line);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .ab-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  filter: saturate(0.55) brightness(0.5);
}

.page-about .ab-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(125% 95% at 8% 0%, rgba(36, 27, 79, 0.95) 0%, rgba(36, 27, 79, 0.52) 44%, rgba(7, 28, 22, 0.92) 100%),
    linear-gradient(180deg, rgba(7, 28, 22, 0.28) 0%, rgba(7, 28, 22, 0.72) 55%, rgba(7, 28, 22, 0.99) 92%);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 2;
  padding-top: clamp(58px, 12vw, 118px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .ab-kick {
  margin: 22px 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .ab-kick span {
  color: var(--orange);
  padding-inline: 4px;
}

.page-about .ab-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(31px, 7.2vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 15em;
  color: var(--glass);
}

.page-about .ab-lede {
  margin: 22px 0 0;
  max-width: 36em;
  font-size: clamp(15px, 3.6vw, 17px);
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .ab-figures {
  list-style: none;
  margin: clamp(30px, 6vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-figures li {
  background: rgba(7, 28, 22, 0.74);
  backdrop-filter: blur(6px);
  padding: 16px 18px 18px;
}

.page-about .ab-fig__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 4.6vw, 25px);
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .ab-fig__lbl {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 分区色带 ---------- */
.page-about .ab-band {
  padding: clamp(54px, 9vw, 104px) 0;
}

.page-about .ab-band--indigo {
  background: var(--indigo);
}

.page-about .ab-band--wine {
  background: var(--wine);
}

.page-about .ab-band--night {
  background: var(--night);
}

.page-about .ab-band--seam {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-h2 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 5.4vw, 43px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--glass);
  max-width: 19em;
}

.page-about .ab-p {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .ab-p strong {
  color: var(--glass);
  font-weight: 600;
}

.page-about .ab-note {
  margin: 30px 0 0;
  max-width: 42em;
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 01 两栏错位 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
}

.page-about .ab-side {
  align-self: start;
  padding: 24px 22px 26px;
  background: rgba(232, 245, 240, 0.06);
  border: 1px solid rgba(43, 240, 200, 0.28);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}

.page-about .ab-side__title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lemon);
}

.page-about .ab-side__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-side__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--glass);
}

.page-about .ab-side__list .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
  padding-top: 3px;
}

/* ---------- 02 联赛版图 ---------- */
.page-about .ab-regions {
  list-style: none;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 0;
  border: 1px solid var(--ab-hair);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-region {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 14px;
  padding: 18px 20px;
  background: rgba(7, 28, 22, 0.3);
  border-bottom: 1px solid var(--ab-hair);
  transition: background 0.24s ease;
}

.page-about .ab-region:last-child {
  border-bottom: 0;
}

.page-about .ab-region:hover,
.page-about .ab-region:focus-within {
  background: rgba(43, 240, 200, 0.09);
}

.page-about .ab-region__no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
  letter-spacing: 0.02em;
}

.page-about .ab-region__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--glass);
  letter-spacing: 0.01em;
}

.page-about .ab-region__dots {
  display: flex;
  gap: 6px;
}

.page-about .ab-region__dots i {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: 0.8;
}

.page-about .ab-region__desc {
  grid-column: 1 / -1;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ab-body);
  max-width: 44em;
}

/* ---------- 03 团队 ---------- */
.page-about .ab-crew {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(232, 245, 240, 0.14);
  border: 1px solid rgba(232, 245, 240, 0.14);
  border-radius: var(--radius);
  overflow: hidden;
  margin: clamp(28px, 5vw, 46px) 0 0;
}

.page-about .ab-crew__card {
  background: var(--ab-card);
  padding: 24px 22px 26px;
  transition: background 0.24s ease;
}

.page-about .ab-crew__card:hover,
.page-about .ab-crew__card:focus-within {
  background: rgba(232, 245, 240, 0.1);
}

.page-about .ab-crew__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .ab-crew__name {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 4.6vw, 26px);
  letter-spacing: -0.01em;
  color: var(--glass);
}

.page-about .ab-crew__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ab-body);
}

.page-about .ab-shot {
  margin: clamp(32px, 6vw, 52px) 0 0;
  border: 1px solid var(--ab-hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: #05130E;
}

.page-about .ab-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.6) brightness(0.72);
}

.page-about .ab-shot__cap {
  display: block;
  padding: 12px 16px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
  border-top: 1px solid var(--ab-hair);
}

/* ---------- 04 时间轴 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
}

.page-about .ab-timeline__item {
  position: relative;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 38px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 240, 200, 0.16);
}

.page-about .ab-timeline__node {
  display: block;
}

.page-about .ab-timeline__head {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 20px;
  align-items: center;
  gap: 0 14px;
  padding: 22px 0 22px 28px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-about .ab-timeline__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .ab-timeline__label {
  display: grid;
  gap: 6px;
}

.page-about .ab-timeline__era {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .ab-timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 4.4vw, 24px);
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--glass);
  transition: color 0.2s ease;
}

.page-about .ab-timeline__node[open] .ab-timeline__title {
  color: var(--cyan);
}

.page-about .ab-timeline__sign {
  position: relative;
  width: 20px;
  height: 20px;
}

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

.page-about .ab-timeline__sign::before {
  width: 12px;
  height: 1px;
}

.page-about .ab-timeline__sign::after {
  width: 1px;
  height: 12px;
  transition: opacity 0.2s ease;
}

.page-about .ab-timeline__node[open] .ab-timeline__sign::after {
  opacity: 0;
}

.page-about .ab-timeline__body {
  padding: 0 0 26px 28px;
}

.page-about .ab-timeline__body p {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ab-body);
}

/* ---------- 05 核验步骤 ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-step {
  background: #09211A;
  padding: 24px 22px 26px;
  border-left: 2px solid transparent;
  transition: border-color 0.24s ease, background 0.24s ease;
}

.page-about .ab-step:hover,
.page-about .ab-step:focus-within {
  border-left-color: var(--lemon);
  background: #0C2A21;
}

.page-about .ab-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--lemon);
}

.page-about .ab-step__name {
  margin: 12px 0 10px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--glass);
}

.page-about .ab-step__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ab-body);
}

/* ---------- 06 合作与认可 ---------- */
.page-about .ab-creds {
  list-style: none;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-cred {
  background: #09211A;
  padding: 22px 20px 24px;
}

.page-about .ab-cred__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 30px);
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .ab-cred__lbl {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .ab-close {
  margin-top: clamp(32px, 6vw, 52px);
  padding-top: 26px;
  border-top: 1px solid var(--ab-hair);
  display: grid;
  gap: 20px;
}

.page-about .ab-close__text {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--glass);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-crew {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 860px) {
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    align-items: start;
  }

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

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

  .page-about .ab-region {
    padding: 20px 24px;
  }

  .page-about .ab-shot img {
    aspect-ratio: 21 / 9;
  }

  .page-about .ab-close {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-hero h1 {
    max-width: 13em;
  }

  .page-about .ab-timeline__head {
    grid-template-columns: 52px minmax(0, 1fr) 22px;
    padding-left: 32px;
  }

  .page-about .ab-timeline__body {
    padding-left: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}