.page-about {
  --ab-glass: rgba(255, 255, 255, 0.045);
  --ab-rail: 30px;
  background-color: var(--ink-void);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(26px, 5vw, 46px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line-blueprint);
  background:
    radial-gradient(circle at 84% 8%, rgba(138, 92, 255, 0.22), transparent 58%),
    radial-gradient(circle at 6% 92%, rgba(255, 107, 44, 0.13), transparent 55%),
    var(--ink-void);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(35, 35, 58, 0.85) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(35, 35, 58, 0.85) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(circle at 62% 38%, #000, transparent 76%);
  mask-image: radial-gradient(circle at 62% 38%, #000, transparent 76%);
}

.page-about .ab-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .breadcrumbs {
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .ab-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cold-blue);
}

.page-about .ab-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 6.6vw, 84px);
  line-height: 1.04;
  letter-spacing: 0.005em;
  transform: skewX(-1.2deg);
  text-shadow: 0 0 34px rgba(138, 92, 255, 0.2);
}

.page-about .ab-hero__accent {
  color: var(--arena-orange);
}

.page-about .ab-hero__lede {
  max-width: 64ch;
  margin: clamp(18px, 3vw, 30px) 0 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: rgba(244, 239, 230, 0.82);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 5vw, 50px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-blueprint);
  border: 1px solid var(--line-blueprint);
}

.page-about .ab-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--ink-slate);
}

.page-about .ab-stats__num {
  font-family: var(--font-num);
  font-size: clamp(30px, 5vw, 50px);
  line-height: 1;
  color: var(--arena-orange);
}

.page-about .ab-stats__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--stone);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .ab-jump__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
  margin-right: 4px;
}

.page-about .ab-jump__item {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--line-blueprint);
  background: var(--ink-slate);
  color: rgba(244, 239, 230, 0.86);
  text-decoration: none;
  font-size: 13px;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .ab-jump__item .num {
  font-family: var(--font-num);
  color: var(--cold-blue);
  font-size: 14px;
}

.page-about .ab-jump__item:hover,
.page-about .ab-jump__item:focus-visible {
  border-color: var(--volt-purple);
  color: var(--white);
  transform: translateY(-2px);
}

.page-about .ab-track {
  position: relative;
  margin: 0;
  padding: 6px 0 0 var(--ab-rail);
  list-style: none;
  counter-reset: stage;
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--volt-purple), var(--cold-blue) 55%, var(--arena-orange));
  opacity: 0.55;
}

.page-about .ab-node {
  position: relative;
  counter-increment: stage;
  padding-bottom: clamp(26px, 4vw, 46px);
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: calc(12px - var(--ab-rail) - 6.5px);
  top: 8px;
  width: 13px;
  height: 13px;
  border: 1px solid var(--volt-purple);
  border-radius: 50%;
  background: var(--ink-void);
  box-shadow: 0 0 0 4px rgba(138, 92, 255, 0.09);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
  z-index: 1;
}

.page-about .ab-node:hover::before {
  background: var(--arena-orange);
  border-color: var(--arena-orange);
  box-shadow: 0 0 14px rgba(255, 107, 44, 0.6);
}

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

.page-about .ab-node__year {
  font-family: var(--font-num);
  font-size: 20px;
  letter-spacing: 0.06em;
  color: var(--cold-blue);
}

.page-about .ab-node__stage {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--stone);
}

.page-about .ab-node__stage::before {
  content: "阶段 " counter(stage, decimal-leading-zero);
}

.page-about .ab-node__body {
  max-width: 760px;
  padding: clamp(16px, 3vw, 26px);
  border: 1px solid var(--line-blueprint);
  border-left: 2px solid var(--line-blueprint);
  background: var(--ab-glass);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .ab-node:hover .ab-node__body,
.page-about .ab-node:focus-within .ab-node__body {
  border-color: rgba(138, 92, 255, 0.55);
  border-left-color: var(--volt-purple);
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(3px);
}

.page-about .ab-node:nth-child(even) .ab-node__body {
  max-width: 620px;
  margin-left: clamp(0px, 5%, 64px);
}

.page-about .ab-node__title {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.78);
}

.page-about .ab-node__note {
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  padding-left: 10px;
  border-left: 2px solid var(--cold-blue);
  font-size: 13px;
  line-height: 1.7;
  color: var(--cold-blue);
  transition: max-height 0.24s var(--ease), opacity 0.2s var(--ease), margin-top 0.24s var(--ease);
}

.page-about .ab-node:hover .ab-node__note,
.page-about .ab-node:focus-within .ab-node__note {
  max-height: 90px;
  margin-top: 12px;
  opacity: 1;
}

.page-about .ab-node__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cold-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(69, 200, 255, 0.35);
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .ab-node__link:hover,
.page-about .ab-node__link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--volt-purple);
}

.page-about .ab-shot {
  position: relative;
  margin-top: 16px;
  border: 1px solid var(--line-blueprint);
  overflow: hidden;
  background: var(--ink-slate);
}

.page-about .ab-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.06) brightness(0.84);
}

.page-about .ab-shot::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(160deg, transparent 52%, rgba(7, 7, 11, 0.78));
}

.page-about .ab-band {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(12px, 3vw, 28px);
  margin-top: clamp(14px, 3vw, 26px);
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line-blueprint);
  background: linear-gradient(100deg, rgba(69, 200, 255, 0.09), rgba(7, 7, 11, 0) 62%);
}

.page-about .ab-band__num {
  font-family: var(--font-num);
  font-size: clamp(48px, 9vw, 96px);
  line-height: 0.9;
  color: var(--cold-blue);
}

.page-about .ab-band__text {
  flex: 1 1 240px;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.78);
}

/* ---------- 服务对象 ---------- */
.page-about .ab-aud-grid {
  display: grid;
  gap: 16px;
  counter-reset: aud;
}

.page-about .ab-aud {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line-blueprint);
  background: linear-gradient(180deg, var(--ab-glass), rgba(16, 16, 24, 0.65));
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .ab-aud::before {
  counter-increment: aud;
  content: counter(aud, decimal-leading-zero);
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-num);
  font-size: 42px;
  line-height: 1;
  color: rgba(69, 200, 255, 0.32);
}

.page-about .ab-aud:nth-child(2)::before {
  color: rgba(138, 92, 255, 0.4);
}

.page-about .ab-aud:nth-child(3)::before {
  color: rgba(255, 107, 44, 0.4);
}

.page-about .ab-aud:hover {
  border-color: rgba(138, 92, 255, 0.55);
  transform: translateY(-3px);
}

.page-about .ab-aud h3 {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: 19px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-aud p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.76);
}

.page-about .ab-aud__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-blueprint);
}

.page-about .ab-aud__list li {
  position: relative;
  padding: 9px 0 9px 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
  border-bottom: 1px solid rgba(35, 35, 58, 0.72);
}

.page-about .ab-aud__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  background: var(--volt-purple);
  transform: rotate(45deg);
}

/* ---------- 内容生产 ---------- */
.page-about .ab-crew {
  display: grid;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .ab-crew__item {
  padding: 18px 0 0;
  border-top: 2px solid var(--volt-purple);
}

.page-about .ab-crew__item:nth-child(2) {
  border-top-color: var(--cold-blue);
}

.page-about .ab-crew__item:nth-child(3) {
  border-top-color: var(--arena-orange);
}

.page-about .ab-crew__num {
  font-family: var(--font-num);
  font-size: clamp(44px, 7vw, 64px);
  line-height: 0.9;
  color: var(--paper);
}

.page-about .ab-crew__role {
  margin: 8px 0 8px;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cold-blue);
}

.page-about .ab-crew__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.74);
}

.page-about .ab-making__lower {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .ab-making__sub {
  margin: 0 0 14px;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}

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

.page-about .ab-flow li {
  position: relative;
  padding: 13px 15px 13px 44px;
  border: 1px solid var(--line-blueprint);
  background: var(--ink-slate);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 239, 230, 0.8);
  transition: border-color 0.22s var(--ease);
}

.page-about .ab-flow li::before {
  counter-increment: flow;
  content: counter(flow);
  position: absolute;
  left: 14px;
  top: 12px;
  font-family: var(--font-num);
  font-size: 19px;
  color: var(--arena-orange);
}

.page-about .ab-flow li:hover {
  border-color: rgba(138, 92, 255, 0.5);
}

.page-about .ab-making__text {
  margin: 18px 0 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(244, 239, 230, 0.76);
}

.page-about .ab-shot--tall {
  margin-top: 0;
}

/* ---------- 技术与数据 ---------- */
.page-about .ab-tech {
  position: relative;
  overflow: hidden;
}

.page-about .ab-ghost {
  position: absolute;
  right: -8px;
  top: -46px;
  font-family: var(--font-num);
  font-size: clamp(150px, 26vw, 320px);
  line-height: 1;
  color: rgba(244, 239, 230, 0.04);
  pointer-events: none;
  user-select: none;
}

.page-about .ab-tech .shell {
  position: relative;
  z-index: 1;
}

.page-about .ab-banner {
  position: relative;
  margin-bottom: clamp(22px, 3.5vw, 36px);
  border: 1px solid var(--line-blueprint);
  overflow: hidden;
  background: var(--ink-slate);
}

.page-about .ab-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.1) brightness(0.8);
}

.page-about .ab-banner__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 12px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(244, 239, 230, 0.78);
  background: linear-gradient(0deg, rgba(7, 7, 11, 0.92), rgba(7, 7, 11, 0));
}

.page-about .ab-caps {
  display: grid;
  gap: 14px;
}

.page-about .ab-cap {
  padding: 6px 0 6px 16px;
  border-left: 1px solid var(--line-blueprint);
  transition: border-left-color 0.22s var(--ease);
}

.page-about .ab-cap:hover {
  border-left-color: var(--cold-blue);
}

.page-about .ab-cap h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-cap p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.74);
}

.page-about .ab-tech__link {
  margin: clamp(22px, 3vw, 34px) 0 0;
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .ab-partner {
  padding: 20px 18px;
  border: 1px solid var(--line-blueprint);
  background: linear-gradient(150deg, rgba(138, 92, 255, 0.08), transparent 68%);
}

.page-about .ab-partner__num {
  font-family: var(--font-num);
  font-size: clamp(40px, 7vw, 60px);
  line-height: 0.9;
  color: var(--paper);
}

.page-about .ab-partner__label {
  margin: 8px 0 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--arena-orange);
}

.page-about .ab-partner__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.74);
}

.page-about .ab-eco__text {
  max-width: 78ch;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-blueprint);
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(244, 239, 230, 0.76);
}

/* ---------- 内容排期 ---------- */
.page-about .ab-cal {
  border-top: 1px solid var(--line-blueprint);
}

.page-about .ab-cal__row {
  display: grid;
  gap: 8px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line-blueprint);
  transition: background 0.22s var(--ease);
}

.page-about .ab-cal__row:hover {
  background: rgba(138, 92, 255, 0.07);
}

.page-about .ab-cal__tag {
  justify-self: start;
}

.page-about .ab-cal__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .ab-cal__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.72);
}

.page-about .ab-cal__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 收束 ---------- */
.page-about .ab-end {
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about .ab-end__panel {
  position: relative;
  padding: clamp(24px, 5vw, 50px);
  border: 1px solid rgba(138, 92, 255, 0.4);
  background:
    linear-gradient(135deg, rgba(138, 92, 255, 0.16), rgba(255, 107, 44, 0.09) 68%, transparent),
    var(--ink-slate);
  overflow: hidden;
}

.page-about .ab-end__panel::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -70px;
  width: 220px;
  height: 220px;
  border: 1px solid rgba(69, 200, 255, 0.24);
  transform: rotate(8deg);
  pointer-events: none;
}

.page-about .ab-end__kicker {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cold-blue);
}

.page-about .ab-end__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 46px);
  line-height: 1.1;
  transform: skewX(-1.2deg);
  color: var(--paper);
}

.page-about .ab-end__text {
  max-width: 66ch;
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: 15px;
  line-height: 1.9;
  color: rgba(244, 239, 230, 0.8);
}

.page-about .ab-end__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  position: relative;
  z-index: 1;
}

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

  .page-about .ab-stats li {
    padding: 20px 18px;
  }
}

@media (min-width: 760px) {
  .page-about .ab-crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .ab-caps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 32px;
  }

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

  .page-about .ab-cal__row {
    grid-template-columns: 168px minmax(0, 1fr) minmax(0, 1.7fr);
    gap: 20px;
    align-items: baseline;
    padding: 18px 8px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-aud-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

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

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

  .page-about .ab-track {
    padding-left: 56px;
  }

  .page-about .ab-track::before {
    left: 24px;
  }

  .page-about .ab-node::before {
    left: calc(24px - 56px - 6.5px);
    width: 13px;
    height: 13px;
  }

  .page-about .ab-node {
    padding-bottom: clamp(32px, 4vw, 56px);
  }
}
<<<END>>>