.page-about {
  --ab-line: rgba(34, 211, 238, 0.22);
  --ab-line-soft: rgba(201, 214, 228, 0.12);
  --ab-card: rgba(18, 41, 74, 0.68);
  --ab-card-deep: rgba(10, 23, 48, 0.72);
  color: var(--text);
}

.page-about .ab-crumbs-row {
  padding-top: clamp(16px, 2.4vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(20px, 3vw, 36px) 0 0;
  overflow: hidden;
}

.page-about .ab-hero__inner {
  position: relative;
  border: 1px solid var(--ab-line);
  border-radius: 10px;
  padding: clamp(24px, 3.6vw, 48px);
  background:
    linear-gradient(152deg, rgba(18, 41, 74, 0.82), rgba(11, 27, 51, 0.42) 62%),
    radial-gradient(120% 90% at 92% 4%, rgba(168, 85, 247, 0.16), transparent 60%);
  overflow: hidden;
}

.page-about .ab-hero__inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(0deg, rgba(28, 110, 126, 0.09) 0 1px, transparent 1px 6px);
  pointer-events: none;
}

.page-about .ab-hero__inner::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, rgba(34, 211, 238, 0.42) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-about .ab-hero__title {
  position: relative;
  margin: 14px 0 0;
  max-width: 22ch;
  font-size: clamp(28px, 4.6vw, 52px);
  line-height: 1.22;
  letter-spacing: 0.06em;
  color: var(--bright);
}

.page-about .ab-hero__lede {
  position: relative;
  margin: 22px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
}

.page-about .ab-hero__facts {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-fact {
  border: 1px solid var(--ab-line-soft);
  border-top: 2px solid var(--cyan);
  border-radius: 6px;
  background: var(--ab-card-deep);
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-fact__value {
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--bright);
  letter-spacing: 0.02em;
}

.page-about .ab-fact__label {
  font-size: 13px;
  color: var(--text);
  opacity: 0.82;
}

/* ---------- 横向主题带 ---------- */
.page-about .ab-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  border: 1px solid var(--ab-line-soft);
  border-radius: 10px;
  background: var(--ab-line-soft);
  overflow: hidden;
}

.page-about .ab-band__cell {
  position: relative;
  padding: clamp(22px, 3vw, 34px) clamp(18px, 2.4vw, 28px);
  background: linear-gradient(160deg, rgba(18, 41, 74, 0.92), rgba(11, 27, 51, 0.6));
  overflow: hidden;
}

.page-about .ab-band__cell::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(0deg, rgba(28, 110, 126, 0.08) 0 1px, transparent 1px 5px);
  pointer-events: none;
}

.page-about .ab-band__cell:first-child {
  border-left: 3px solid var(--cyan);
}

.page-about .ab-band__cell:nth-child(2) {
  border-left: 3px solid var(--purple);
}

.page-about .ab-band__cell:last-child {
  border-left: 3px solid var(--amber);
}

.page-about .ab-band__idx {
  position: relative;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  opacity: 0.85;
}

.page-about .ab-band__title {
  position: relative;
  margin: 10px 0 0;
  font-size: clamp(20px, 2.4vw, 26px);
  letter-spacing: 0.14em;
  color: var(--bright);
}

.page-about .ab-band__text {
  position: relative;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  max-width: 42ch;
}

/* ---------- 时间轴 ---------- */
.page-about .ab-history__figure {
  margin: clamp(26px, 3.6vw, 40px) 0 0;
}

.page-about .ab-tl {
  margin: clamp(36px, 5vw, 64px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: clamp(40px, 5.4vw, 76px);
}

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

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 48px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.5), rgba(168, 85, 247, 0.28) 60%, transparent);
}

.page-about .ab-tl__item:last-child::before {
  display: none;
}

.page-about .ab-tl__idx {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--ab-line);
  border-radius: 50%;
  background: var(--panel-deep);
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .ab-tl__item:hover .ab-tl__idx,
.page-about .ab-tl__item:focus-within .ab-tl__idx,
.page-about .ab-tl__item:focus .ab-tl__idx {
  border-color: var(--amber);
  color: var(--amber);
  box-shadow: 0 0 0 4px rgba(245, 165, 36, 0.08);
}

.page-about .ab-tl__item:focus {
  outline: none;
}

.page-about .ab-tl__body {
  padding-top: 8px;
}

.page-about .ab-tl__title {
  margin: 0;
  font-size: clamp(17px, 1.9vw, 21px);
  letter-spacing: 0.06em;
  color: var(--bright);
}

.page-about .ab-tl__text {
  margin: 10px 0 0;
  max-width: 70ch;
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .ab-tl__more {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--cyan);
  opacity: 0.6;
  transform: translateY(-2px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.page-about .ab-tl__item:hover .ab-tl__more,
.page-about .ab-tl__item:focus-within .ab-tl__more,
.page-about .ab-tl__item:focus .ab-tl__more {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 分类体系 ---------- */
.page-about .ab-catwrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(28px, 4vw, 44px);
}

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

.page-about .ab-catwrap__lede {
  margin: 0;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  max-width: 60ch;
}

.page-about .ab-counts {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  border: 1px solid var(--ab-line-soft);
  border-radius: 8px;
  background: var(--ab-line-soft);
  overflow: hidden;
}

.page-about .ab-count {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 16px;
  background: var(--ab-card-deep);
}

.page-about .ab-count--total {
  background: linear-gradient(120deg, rgba(34, 211, 238, 0.14), rgba(168, 85, 247, 0.14));
}

.page-about .ab-count__k {
  font-size: 15px;
}

.page-about .ab-count__v {
  font-size: 19px;
  color: var(--bright);
  letter-spacing: 0.02em;
}

.page-about .ab-count--total .ab-count__v {
  color: var(--amber);
}

.page-about .ab-catwrap__note {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text);
  opacity: 0.9;
  padding-left: 14px;
  border-left: 2px solid rgba(168, 85, 247, 0.5);
}

.page-about .ab-inline-btn {
  display: inline-block;
  margin-top: 22px;
}

/* ---------- 团队与节点 ---------- */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(28px, 4vw, 44px);
}

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

.page-about .ab-roles {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .ab-role {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 16px;
  padding: 14px 16px;
  border: 1px solid var(--ab-line-soft);
  border-left: 2px solid rgba(34, 211, 238, 0.45);
  border-radius: 8px;
  background: var(--ab-card);
}

.page-about .ab-role__name {
  font-size: 15.5px;
  color: var(--bright);
  letter-spacing: 0.04em;
}

.page-about .ab-role__num {
  font-size: 17px;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .ab-role__desc {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
  opacity: 0.86;
}

.page-about .ab-nodes {
  margin-top: 24px;
  padding: 18px;
  border: 1px dashed rgba(34, 211, 238, 0.3);
  border-radius: 10px;
  background: linear-gradient(140deg, rgba(10, 23, 48, 0.7), rgba(27, 18, 54, 0.42));
}

.page-about .ab-nodes__caption {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-about .ab-nodes__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-node {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(34, 211, 238, 0.38);
  border-radius: 6px;
  background: radial-gradient(circle at 50% 50%, rgba(34, 211, 238, 0.26), transparent 72%);
  font-size: 11px;
  color: var(--cyan);
}

.page-about .ab-nodes__regions {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--text);
  opacity: 0.78;
}

.page-about .ab-team__extra {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  padding-left: 14px;
  border-left: 2px solid rgba(245, 165, 36, 0.55);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .ab-ring-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-about .ab-ring {
  width: min(100%, 300px);
  height: auto;
}

.page-about .ab-ring__text {
  fill: var(--bright);
  font-size: 30px;
  letter-spacing: 0.02em;
}

.page-about .ab-ring__sub {
  fill: var(--text);
  font-size: 12px;
  letter-spacing: 0.1em;
  opacity: 0.85;
}

.page-about .ab-partners__list {
  display: grid;
  gap: 10px;
}

.page-about .ab-supplier {
  padding: 16px;
  border: 1px solid var(--ab-line-soft);
  border-radius: 8px;
  background: var(--ab-card);
  transition: border-color 0.24s ease, transform 0.24s ease, background 0.24s ease;
}

.page-about .ab-supplier:hover {
  border-color: rgba(168, 85, 247, 0.6);
  transform: translateX(4px);
  background: linear-gradient(120deg, rgba(18, 41, 74, 0.9), rgba(27, 18, 54, 0.6));
}

.page-about .ab-supplier__name {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--bright);
}

.page-about .ab-supplier__meta {
  margin: 8px 0 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--purple);
}

.page-about .ab-supplier__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  opacity: 0.9;
}

.page-about .ab-partners__rule {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  padding: 14px 16px;
  border: 1px solid rgba(34, 211, 238, 0.22);
  border-radius: 8px;
  background: rgba(18, 41, 74, 0.42);
}

/* ---------- 三件事 ---------- */
.page-about .ab-creed__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .ab-creed__card {
  position: relative;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--ab-line-soft);
  border-radius: 10px;
  background: linear-gradient(150deg, rgba(18, 41, 74, 0.78), rgba(10, 23, 48, 0.6));
  overflow: hidden;
}

.page-about .ab-creed__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--purple));
}

.page-about .ab-creed__card::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(0deg, rgba(28, 110, 126, 0.07) 0 1px, transparent 1px 5px);
  pointer-events: none;
}

.page-about .ab-creed__idx {
  position: relative;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-about .ab-creed__title {
  position: relative;
  margin: 12px 0 0;
  font-size: clamp(18px, 2vw, 22px);
  letter-spacing: 0.08em;
  color: var(--bright);
}

.page-about .ab-creed__text {
  position: relative;
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 下一步 ---------- */
.page-about .ab-cta__box {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 36px);
  padding: clamp(24px, 3.6vw, 46px);
  border: 1px solid var(--ab-line);
  border-radius: 12px;
  background:
    linear-gradient(140deg, rgba(27, 18, 54, 0.8), rgba(11, 27, 51, 0.55) 70%),
    radial-gradient(110% 80% at 12% 10%, rgba(34, 211, 238, 0.16), transparent 62%);
}

.page-about .ab-cta__title {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.6vw, 30px);
  line-height: 1.35;
  letter-spacing: 0.06em;
  color: var(--bright);
}

.page-about .ab-cta__text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

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

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

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

  .page-about .ab-partners__rule,
  .page-about .ab-inline-btn {
    grid-column: 1 / -1;
  }
}

@media (min-width: 880px) {
  .page-about .ab-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .ab-catwrap {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    align-items: center;
  }

  .page-about .ab-catwrap__figure {
    order: 2;
  }

  .page-about .ab-catwrap__text {
    order: 1;
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-partners__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: center;
  }

  .page-about .ab-cta__box {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-tl {
    padding-left: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl__idx,
  .page-about .ab-tl__more,
  .page-about .ab-supplier {
    transition: none;
  }
}