.page-about {
  --ab-line: rgba(34, 224, 208, 0.22);
  --ab-line-soft: rgba(216, 201, 164, 0.16);
  --ab-card-bg: rgba(14, 42, 35, 0.86);
  --ab-cut: 14px;
  position: relative;
  padding-bottom: clamp(48px, 8vw, 104px);
  color: var(--paper);
}

.page-about .ab-crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- hero ---------- */

.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 5vw, 54px) 0 clamp(30px, 5vw, 56px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  left: -14%;
  top: -22%;
  width: min(780px, 104%);
  height: 156%;
  background: linear-gradient(148deg, var(--indigo) 0%, var(--ink-800) 58%, rgba(14, 42, 35, 0) 100%);
  transform: rotate(-6deg);
  border-right: 1px solid var(--ab-line);
}

.page-about .ab-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: end;
}

.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 8.4vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0.5rem 0 0.9rem;
  max-width: 22ch;
  color: var(--paper);
}

.page-about .ab-hero__text .lede {
  max-width: 56ch;
  color: rgba(234, 247, 244, 0.82);
  margin: 0 0 clamp(20px, 3vw, 30px);
}

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

.page-about .ab-hero__figure {
  margin: 0;
  border: 1px solid var(--ab-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
  background: var(--ink-800);
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

/* ---------- facts ---------- */

.page-about .ab-facts {
  list-style: none;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
}

.page-about .ab-facts li {
  background: var(--ink-900);
  padding: clamp(14px, 2.4vw, 22px);
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-about .ab-facts b {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 5vw, 2.1rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .ab-facts span {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 通用区块 ---------- */

.page-about .ab-section {
  padding: clamp(44px, 7vw, 88px) 0 0;
}

.page-about .ab-section h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 5.4vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0.4rem 0 0;
  max-width: 26ch;
}

.page-about .ab-section p {
  color: rgba(234, 247, 244, 0.78);
}

/* ---------- 起点 ---------- */

.page-about .ab-origin__grid {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .ab-origin__aside {
  border-left: 2px solid var(--lime);
  padding: 4px 0 4px clamp(14px, 2vw, 20px);
}

.page-about .ab-quote {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 4.6vw, 1.9rem);
  line-height: 1.24;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--paper) !important;
}

.page-about .ab-quote__note {
  margin: 0;
  font-size: 0.86rem;
  color: var(--mist) !important;
}

.page-about .ab-origin__body p {
  margin: 0 0 1em;
}

.page-about .ab-origin__body .link-arrow {
  display: inline-block;
  margin-top: 6px;
}

/* ---------- 时间轴 ---------- */

.page-about .ab-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(20px, 3vw, 30px) 0 clamp(24px, 4vw, 38px);
}

.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .ab-node {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-about .ab-node__year {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.8rem, 8vw, 2.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan);
}

.page-about .ab-node__body {
  background: var(--ab-card-bg);
  border: 1px solid var(--ab-line);
  padding: clamp(16px, 2.8vw, 26px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

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

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

.page-about .ab-node__body p {
  margin: 0;
  font-size: 0.95rem;
}

/* ---------- 团队 ---------- */

.page-about .ab-team__grid {
  align-items: start;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .ab-team__figure {
  margin: 0;
  border: 1px solid var(--ab-line-soft);
  background: var(--ink-800);
  padding: 10px;
}

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

.page-about .ab-team__figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
  color: var(--mist);
  padding: 10px 2px 2px;
}

.page-about .ab-metrics {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--ab-line-soft);
}

.page-about .ab-metrics li {
  background: var(--ink-900);
  padding: 14px 12px;
  display: grid;
  gap: 5px;
}

.page-about .ab-metrics b {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 4vw, 1.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-metrics span {
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  color: var(--mist);
}

/* ---------- 协作网络 ---------- */

.page-about .ab-net__grid {
  margin-top: clamp(22px, 3.5vw, 36px);
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .ab-net__card {
  background: linear-gradient(160deg, rgba(27, 20, 53, 0.9), rgba(6, 23, 19, 0.95));
  border: 1px solid var(--ab-line-soft);
  border-top: 3px solid var(--cyan);
  padding: clamp(18px, 3vw, 28px);
  transition: border-color 0.25s ease;
}

.page-about .ab-net__card:hover {
  border-top-color: var(--lime);
}

.page-about .ab-net__idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .ab-net__card h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.16rem;
  letter-spacing: -0.01em;
  margin: 10px 0 8px;
  color: var(--paper);
}

.page-about .ab-net__card p {
  margin: 0;
  font-size: 0.92rem;
}

.page-about .ab-net__more {
  margin: clamp(18px, 3vw, 26px) 0 0;
}

/* ---------- 资质与荣誉 ---------- */

.page-about .ab-honor__grid {
  align-items: center;
  gap: clamp(24px, 4vw, 46px);
}

.page-about .ab-honor__figure {
  margin: 0;
  border: 1px solid var(--ab-line);
  padding: 12px;
  background:
    repeating-linear-gradient(45deg, rgba(216, 201, 164, 0.06) 0 5px, transparent 5px 12px),
    var(--ink-800);
}

.page-about .ab-honor__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .ab-honor__list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--ab-line-soft);
}

.page-about .ab-honor__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--ab-line-soft);
}

.page-about .ab-honor__list b {
  font-family: var(--font-mono);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--lime);
  min-width: 5.6em;
}

.page-about .ab-honor__list span {
  font-size: 0.92rem;
  color: rgba(234, 247, 244, 0.78);
}

/* ---------- 更新节奏 ---------- */

.page-about .ab-rhythm__list {
  list-style: none;
  margin: clamp(22px, 3.5vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .ab-rhythm__item {
  position: relative;
  background: rgba(6, 23, 19, 0.7);
  border: 1px solid var(--ab-line-soft);
  border-left: 3px solid var(--ember);
  padding: clamp(16px, 2.6vw, 24px);
  display: grid;
  gap: 6px;
}

.page-about .ab-rhythm__time {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ember);
}

.page-about .ab-rhythm__item h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--paper);
}

.page-about .ab-rhythm__item p {
  margin: 0;
  font-size: 0.92rem;
}

/* ---------- 收尾 ---------- */

.page-about .ab-start__panel {
  background: linear-gradient(120deg, var(--indigo) 0%, var(--wine) 100%);
  border: 1px solid var(--ab-line);
  padding: clamp(24px, 4vw, 46px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}

.page-about .ab-start__panel h2 {
  max-width: 20ch;
}

.page-about .ab-start__panel p {
  max-width: 52ch;
  margin: 14px 0 clamp(20px, 3vw, 28px);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .ab-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 880px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .ab-honor__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

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

  .page-about .ab-track {
    position: relative;
  }

  .page-about .ab-track::before {
    content: "";
    position: absolute;
    left: 117px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background: linear-gradient(180deg, var(--cyan), rgba(34, 224, 208, 0.06));
  }

  .page-about .ab-node {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 0;
    align-items: start;
  }

  .page-about .ab-node__year {
    text-align: right;
    position: relative;
    padding-top: 3px;
    font-size: clamp(1.7rem, 2.2vw, 2.1rem);
  }

  .page-about .ab-node__year::after {
    content: "";
    position: absolute;
    right: -6px;
    top: 9px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--ink-900);
    border: 2px solid var(--cyan);
    box-shadow: 0 0 12px rgba(34, 224, 208, 0.45);
  }

  .page-about .ab-node__body {
    margin-left: 30px;
  }

  .page-about .ab-node__body p {
    max-width: 62ch;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-hero h1 {
    font-size: 4.1rem;
  }

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