.page-about {
  --ab-rail: 132px;
  background: var(--ink);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: calc(var(--header-h) + 28px) 0 56px;
  background:
    radial-gradient(circle at 84% 6%, rgba(43, 240, 200, 0.16), transparent 58%),
    radial-gradient(circle at 6% 88%, rgba(255, 122, 47, 0.1), transparent 52%),
    linear-gradient(180deg, #071613 0%, var(--ink) 78%);
  border-bottom: 2px solid var(--line);
  overflow: hidden;
}
.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.28;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}
.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .ab-hero__crumb {
  margin-bottom: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-about .ab-hero__crumb a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .ab-hero__crumb a:hover {
  color: var(--ice);
}
.page-about .ab-hero__crumb .st-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .ab-hero__crumb .st-breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 28px;
}
.page-about .ab-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: #ffffff;
  max-width: 14ch;
}
.page-about .ab-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}
.page-about .ab-hero__meta {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .ab-hero__media {
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--stand);
}
.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}
.page-about .ab-hero__media .st-media__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist);
  border-top: 2px solid var(--line);
}

/* ---------- 通用小节间距 ---------- */
.page-about .st-section {
  padding: 56px 0;
  border-bottom: 1px solid rgba(22, 52, 45, 0.7);
}
.page-about .st-section__head {
  margin-bottom: 28px;
}
.page-about .st-h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.4vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ice);
  max-width: 20ch;
}
.page-about .st-lede {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
}
.page-about .st-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-transform: uppercase;
}

/* ---------- 起点 ---------- */
.page-about .ab-origin__grid {
  display: grid;
  gap: 28px;
}
.page-about .ab-origin__text p {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
}
.page-about .ab-origin__why {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .ab-origin__why li {
  padding: 16px 18px;
  background: var(--stand);
  border: 2px solid var(--line);
  border-left: 4px solid var(--cyan);
  box-shadow: var(--shadow-hard);
}
.page-about .ab-origin__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
  margin-bottom: 6px;
}
.page-about .ab-origin__why strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 6px;
}
.page-about .ab-origin__why p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 数据流水线 ---------- */
.page-about .ab-flow {
  background:
    linear-gradient(180deg, rgba(10, 30, 27, 0.85), rgba(5, 16, 14, 0.95));
}
.page-about .ab-flow__banner {
  margin: 0 0 26px;
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--stand);
}
.page-about .ab-flow__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}
.page-about .ab-flow__banner .st-media__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  border-top: 2px solid var(--line);
}
.page-about .ab-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
  counter-reset: none;
}
.page-about .ab-flow__card {
  position: relative;
  padding: 20px 18px 18px;
  background: linear-gradient(160deg, #0C2320 0%, var(--stand) 100%);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  outline: none;
}
.page-about .ab-flow__card:hover,
.page-about .ab-flow__card:focus-visible,
.page-about .ab-flow__card:focus-within {
  transform: translate(2px, 2px);
  border-color: var(--cyan);
  box-shadow: var(--shadow-press);
}
.page-about .ab-flow__card:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan), var(--shadow-press);
}
.page-about .ab-flow__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--cyan);
  padding: 2px 8px;
  margin-bottom: 12px;
}
.page-about .ab-flow__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ice);
}
.page-about .ab-flow__card > p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .ab-flow__more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  padding-top: 0;
  border-top: 1px dashed transparent;
  transition: max-height 0.2s var(--ease), opacity 0.2s var(--ease),
    margin-top 0.2s var(--ease), padding-top 0.2s var(--ease);
  font-size: 13.5px !important;
  line-height: 1.7;
  color: var(--text) !important;
}
.page-about .ab-flow__card:hover .ab-flow__more,
.page-about .ab-flow__card:focus .ab-flow__more,
.page-about .ab-flow__card:focus-within .ab-flow__more {
  max-height: 160px;
  opacity: 1;
  margin-top: 12px;
  padding-top: 12px;
  border-top-color: var(--line);
}
.page-about .ab-flow__time {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--orange);
  margin-right: 8px;
}

/* ---------- 版本时间轴 ---------- */
.page-about .ab-time__wrap {
  display: grid;
  gap: 22px;
}
.page-about .ab-time__rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
}
.page-about .ab-time__rail-link {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  padding: 6px 14px;
  border: 2px solid var(--line);
  background: var(--stand);
  transition: border-color 0.12s var(--ease), color 0.12s var(--ease), background 0.12s var(--ease);
}
.page-about .ab-time__rail-link:hover,
.page-about .ab-time__rail-link:focus-visible {
  border-color: var(--cyan);
  background: rgba(43, 240, 200, 0.12);
  color: var(--ice);
  outline: none;
}
.page-about .ab-time__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 16px;
  display: grid;
  gap: 16px;
  border-left: 2px solid var(--line);
}
.page-about .ab-time__item {
  position: relative;
  padding: 18px 18px 18px 20px;
  background: var(--stand);
  border: 2px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 16px);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about .ab-time__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 26px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--line);
  transform: rotate(45deg);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .ab-time__item:target {
  border-color: var(--cyan);
  box-shadow: var(--shadow-hard);
}
.page-about .ab-time__item:target::before {
  background: var(--cyan);
  border-color: var(--cyan);
}
.page-about .ab-time__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.page-about .ab-time__ver {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--yellow);
}
.page-about .ab-time__item .st-h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ice);
}
.page-about .ab-time__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}
.page-about .ab-time__note {
  margin-top: 10px !important;
  font-size: 13px !important;
  color: var(--mist) !important;
  padding-left: 12px;
  border-left: 2px solid var(--violet);
}
.page-about .st-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border: 1px solid var(--line);
  color: var(--mist);
}
.page-about .st-tag--orange {
  color: var(--ink);
  background: var(--orange);
  border-color: var(--orange);
}
.page-about .st-tag--violet {
  color: var(--violet);
  border-color: var(--violet);
}

/* ---------- 覆盖范围 ---------- */
.page-about .ab-cov__bento {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.page-about .ab-cov__cell {
  padding: 18px 16px;
  background: var(--stand);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  min-width: 0;
}
.page-about .ab-cov__cell--wide {
  grid-column: 1 / -1;
  background: linear-gradient(120deg, rgba(43, 240, 200, 0.14), var(--stand) 62%);
  border-color: var(--cyan);
}
.page-about .ab-cov__cell--amber {
  background: linear-gradient(150deg, rgba(255, 122, 47, 0.16), var(--stand) 70%);
}
.page-about .ab-cov__cell--violet {
  background: linear-gradient(150deg, rgba(139, 107, 255, 0.16), var(--stand) 70%);
}
.page-about .ab-cov__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 8vw, 52px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--yellow);
}
.page-about .ab-cov__num small {
  font-size: 0.42em;
  margin-left: 2px;
  color: var(--mist);
}
.page-about .ab-cov__label {
  margin: 10px 0 0;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ice);
}
.page-about .ab-cov__desc {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 合作与反馈 ---------- */
.page-about .ab-partner__grid {
  display: grid;
  gap: 22px;
}
.page-about .ab-partner__cards {
  display: grid;
  gap: 14px;
}
.page-about .ab-partner__card {
  padding: 18px;
  background: var(--stand);
  border: 2px solid var(--line);
  border-top: 4px solid var(--orange);
  box-shadow: var(--shadow-hard);
}
.page-about .ab-partner__card--plain {
  border-top-color: var(--cyan);
}
.page-about .ab-partner__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}
.page-about .ab-partner__title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ice);
}
.page-about .ab-partner__card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .ab-partner__link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 2px solid var(--cyan);
  padding-bottom: 2px;
}
.page-about .ab-partner__link:hover {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

.page-about .ab-partner__gauges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 20px 16px 16px;
  background: var(--ink);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}
.page-about .ab-gauge {
  text-align: center;
  min-width: 0;
}
.page-about .ab-gauge__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 190px;
  margin: 0 auto;
}
.page-about .ab-gauge__track,
.page-about .ab-gauge__arc {
  fill: none;
  stroke-width: 12;
  stroke-linecap: round;
}
.page-about .ab-gauge__track {
  stroke: var(--line);
}
.page-about .ab-gauge__arc {
  stroke-dasharray: 251.33;
  stroke-dashoffset: var(--ab-off, 0);
  transition: stroke-dashoffset 0.9s var(--ease);
}
.page-about .ab-gauge__arc--a {
  stroke: var(--cyan);
  --ab-off: 10;
}
.page-about .ab-gauge__arc--b {
  stroke: var(--yellow);
  --ab-off: 17.6;
}
.page-about .ab-gauge__num {
  margin: -26px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 6vw, 30px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #ffffff;
}
.page-about .ab-gauge__num small {
  font-size: 0.5em;
  color: var(--cyan);
}
.page-about .ab-gauge__label {
  margin: 20px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}
.page-about .ab-partner__source {
  grid-column: 1 / -1;
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.st-js .page-about [data-reveal]:not(.is-in) .ab-gauge__arc {
  stroke-dashoffset: 251.33;
}

/* ---------- 赛季节奏 ---------- */
.page-about .ab-season__band {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}
.page-about .ab-season__phase {
  position: relative;
  padding: 16px 16px 18px;
  background: var(--stand);
  border: 2px solid var(--line);
  border-top: 6px solid var(--line);
}
.page-about .ab-season__phase--hot {
  border-top-color: var(--orange);
  background: linear-gradient(170deg, rgba(255, 122, 47, 0.14), var(--stand) 68%);
}
.page-about .ab-season__phase:nth-child(1) { border-top-color: var(--violet); }
.page-about .ab-season__phase:nth-child(2) { border-top-color: var(--cyan); }
.page-about .ab-season__phase:nth-child(4) { border-top-color: var(--yellow); }
.page-about .ab-season__phase:nth-child(5) { border-top-color: var(--ice); }
.page-about .ab-season__tick {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--cyan);
  padding: 2px 7px;
  margin-bottom: 10px;
}
.page-about .ab-season__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--ice);
}
.page-about .ab-season__phase p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .ab-season__foot {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}
.page-about .ab-season__media {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--stand);
}
.page-about .ab-season__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}
.page-about .ab-season__media .st-media__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mist);
  border-top: 2px solid var(--line);
}
.page-about .ab-season__output {
  padding: 20px 18px;
  background: var(--ink);
  border: 2px solid var(--line);
  border-left: 4px solid var(--yellow);
}
.page-about .ab-season__output-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--yellow);
}
.page-about .ab-season__output-num small {
  font-size: 0.45em;
  color: var(--mist);
}
.page-about .ab-season__output-num--small {
  margin-top: 18px;
  font-size: 30px;
  color: var(--cyan);
}
.page-about .ab-season__output-label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}
.page-about .ab-season__output-desc {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text);
}
.page-about .ab-season__output-desc a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}
.page-about .ab-season__output-desc a:hover {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

/* ---------- 结尾行动 ---------- */
.page-about .ab-cta {
  padding: 48px 0 60px;
  background:
    radial-gradient(circle at 88% 20%, rgba(255, 122, 47, 0.22), transparent 60%),
    linear-gradient(120deg, #0C2320 0%, var(--ink) 70%);
  border-top: 2px solid var(--line);
}
.page-about .ab-cta__inner {
  display: grid;
  gap: 22px;
  align-items: center;
}
.page-about .ab-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 4.6vw, 34px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #ffffff;
}
.page-about .ab-cta__copy p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}
.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .st-section {
    padding: 68px 0;
  }
  .page-about .ab-flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-cov__bento {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-cov__cell--wide {
    grid-column: span 2;
  }
  .page-about .ab-partner__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-partner__card--plain {
    grid-column: 1 / -1;
  }
  .page-about .ab-season__band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-season__foot {
    grid-template-columns: 1.4fr 1fr;
    align-items: start;
  }
  .page-about .ab-cta__inner {
    grid-template-columns: 1.6fr auto;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .ab-hero {
    padding: calc(var(--header-h) + 44px) 0 72px;
  }
  .page-about .ab-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    gap: 44px;
    align-items: center;
  }
  .page-about .ab-hero__lede {
    font-size: 17px;
  }
  .page-about .ab-origin__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 40px;
    align-items: start;
  }
  .page-about .ab-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-time__wrap {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: 36px;
    align-items: start;
  }
  .page-about .ab-time__rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .ab-time__rail-link {
    text-align: center;
    font-size: 15px;
    padding: 10px 0;
  }
  .page-about .ab-partner__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 26px;
    align-items: start;
  }
  .page-about .ab-partner__gauges {
    padding: 26px 20px 20px;
  }
  .page-about .ab-season__band {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-about .ab-season__foot {
    grid-template-columns: 1.55fr 1fr;
    gap: 28px;
  }
  .page-about .ab-cov__cell {
    padding: 22px 20px;
  }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-flow__card,
  .page-about .ab-flow__more,
  .page-about .ab-time__item,
  .page-about .ab-time__rail-link,
  .page-about .ab-gauge__arc {
    transition: opacity 0.01ms linear;
  }
  .page-about .ab-flow__card:hover,
  .page-about .ab-flow__card:focus-visible,
  .page-about .ab-flow__card:focus-within {
    transform: none;
  }
}

/* ---------- 窄屏展开工序说明 ---------- */
@media (max-width: 699px) {
  .page-about .ab-flow__more {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
    padding-top: 12px;
    border-top-color: var(--line);
  }
}
<<<END>>>