.page-about {
  --ab-cut: 16px;
  --ab-cut-lg: 22px;
  --ab-rail: var(--ly-line);
  --ab-spy-w: 208px;
}

/* 面包屑 */
.page-about .ly-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 22px 0 6px;
  font-family: var(--ly-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ly-mist);
}
.page-about .ly-breadcrumb a {
  color: var(--ly-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-about .ly-breadcrumb a:hover,
.page-about .ly-breadcrumb a:focus-visible {
  color: var(--ly-cyan);
  border-bottom-color: var(--ly-cyan);
}
.page-about .ly-breadcrumb__sep {
  color: var(--ly-line);
}

/* 首屏 */
.page-about .ab-hero {
  position: relative;
  padding: 8px 0 40px;
  overflow: hidden;
  background:
    radial-gradient(circle at 88% 8%, rgba(53, 242, 208, 0.16), transparent 46%),
    radial-gradient(circle at 4% 82%, rgba(42, 127, 255, 0.14), transparent 52%),
    linear-gradient(160deg, var(--ly-abyss) 0%, var(--ly-deep) 58%, var(--ly-abyss) 100%);
  border-bottom: 1px solid var(--ly-line);
}
.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -60% -10%;
  height: 220px;
  background: repeating-linear-gradient(
    100deg,
    rgba(53, 242, 208, 0.09) 0 1px,
    transparent 1px 22px
  );
  pointer-events: none;
}
.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}
.page-about .ab-hero__title {
  margin: 10px 0 0;
  font-family: var(--ly-font-display);
  font-size: clamp(30px, 7.6vw, 76px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--ly-ice);
}
.page-about .ab-hero__lead {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--ly-mist);
  font-size: 16px;
  line-height: 1.85;
}
.page-about .ab-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
.page-about .ly-tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ly-cyan);
  border: 1px solid rgba(53, 242, 208, 0.34);
  background: rgba(53, 242, 208, 0.06);
  clip-path: polygon(8px 0, 100% 0, 100% 100%, 0 100%, 0 8px);
}

/* 首屏状态面板 */
.page-about .ab-hero__panel {
  padding: 20px 18px;
  background: linear-gradient(150deg, var(--ly-panel), var(--ly-deep));
  border: 1px solid var(--ly-line);
  border-left: 3px solid var(--ly-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut-lg)), calc(100% - var(--ab-cut-lg)) 100%, 0 100%);
}
.page-about .ab-status {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ly-line);
}
.page-about .ab-status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ly-cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 208, 0.16);
  animation: ab-pulse 2.6s var(--ly-ease) infinite;
}
@keyframes ab-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(53, 242, 208, 0.16); }
  50% { box-shadow: 0 0 0 8px rgba(53, 242, 208, 0.05); }
}
.page-about .ab-status__ver {
  font-size: 13px;
  font-weight: 600;
  color: var(--ly-cyan);
  letter-spacing: 0.08em;
}
.page-about .ab-status__text {
  font-size: 12px;
  color: var(--ly-mist);
}
.page-about .ab-facts {
  margin: 0;
  padding: 6px 0 0;
}
.page-about .ab-facts__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(28, 74, 102, 0.7);
}
.page-about .ab-facts__row:last-child {
  border-bottom: 0;
}
.page-about .ab-facts dt {
  font-size: 12px;
  color: var(--ly-mist);
  letter-spacing: 0.04em;
}
.page-about .ab-facts dd {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ly-ice);
}

/* 主体双栏 */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding-bottom: 72px;
}
.page-about .ab-spy {
  display: none;
}
.page-about .ab-body {
  min-width: 0;
}

/* 章节 */
.page-about .ab-section {
  padding: 42px 0 6px;
  border-top: 1px solid rgba(28, 74, 102, 0.65);
}
.page-about .ab-section:first-child {
  border-top: 0;
}
.page-about .ab-section .ly-title {
  margin: 8px 0 0;
  font-family: var(--ly-font-display);
  font-size: clamp(23px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--ly-ice);
}
.page-about .ab-section p {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ly-mist);
}
.page-about .ab-section p a {
  color: var(--ly-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.4);
}
.page-about .ab-section p a:hover {
  border-bottom-color: var(--ly-cyan);
}

/* 进入方式 */
.page-about .ab-entry {
  margin-top: 24px;
  padding: 18px;
  background: rgba(14, 47, 74, 0.62);
  border: 1px solid var(--ly-line);
  clip-path: polygon(var(--ab-cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--ab-cut));
}
.page-about .ab-entry__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ly-mist);
}
.page-about .ab-entry__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-entry__list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--ly-ice);
  background: rgba(4, 18, 31, 0.6);
  border-left: 2px solid var(--ly-cyan);
}
.page-about .ab-entry__list .ly-mono {
  font-size: 11px;
  color: var(--ly-mist);
  letter-spacing: 0.08em;
}

/* 团队 */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.page-about .ly-media {
  margin: 20px 0 0;
  background:
    linear-gradient(115deg, rgba(53, 242, 208, 0.1), rgba(42, 127, 255, 0.08)),
    var(--ly-panel);
  border: 1px solid var(--ly-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut-lg)), calc(100% - var(--ab-cut-lg)) 100%, 0 100%);
  overflow: hidden;
}
.page-about .ly-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ly-media__cap {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--ly-mist);
  border-top: 1px solid var(--ly-line);
}
.page-about .ab-team__media {
  margin-top: 4px;
}
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}
.page-about .ly-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 12px;
  background: var(--ly-deep);
  border-top: 2px solid var(--ly-cyan);
}
.page-about .ly-metric__value {
  font-size: clamp(24px, 6vw, 34px);
  font-weight: 600;
  line-height: 1;
  color: var(--ly-cyan);
  font-variant-numeric: tabular-nums;
}
.page-about .ly-metric__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ly-mist);
}

/* 版本演进 */
.page-about .ab-roadmap__media {
  margin-top: 22px;
}
.page-about .ab-timeline {
  position: relative;
  margin: 30px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}
.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 1px;
  background: linear-gradient(180deg, var(--ly-cyan), var(--ly-line) 34%, var(--ly-line) 78%, transparent);
}
.page-about .ab-timeline__item {
  position: relative;
  padding-bottom: 22px;
}
.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  top: 10px;
  left: -22px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ly-deep);
  border: 2px solid var(--ly-line);
}
.page-about .ab-timeline__item--now::before {
  background: var(--ly-cyan);
  border-color: var(--ly-cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 208, 0.16);
}
.page-about .ab-timeline__year {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ly-gold);
}
.page-about .ab-timeline__card {
  padding: 16px 16px 14px;
  background: rgba(14, 47, 74, 0.55);
  border: 1px solid var(--ly-line);
  transform: skewX(0deg);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
  transition: border-color 180ms var(--ly-ease), transform 180ms var(--ly-ease);
}
.page-about .ab-timeline__card:hover {
  border-color: rgba(53, 242, 208, 0.5);
  transform: translateY(-2px);
}
.page-about .ab-timeline__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ly-ice);
  line-height: 1.4;
}
.page-about .ab-timeline__card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
}
.page-about .ab-more {
  margin-top: 12px;
  border-top: 1px dashed rgba(28, 74, 102, 0.8);
  padding-top: 10px;
}
.page-about .ab-more summary {
  cursor: pointer;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ly-cyan);
  list-style: none;
}
.page-about .ab-more summary::-webkit-details-marker {
  display: none;
}
.page-about .ab-more summary::before {
  content: "+ ";
  font-family: var(--ly-font-mono);
}
.page-about .ab-more[open] summary::before {
  content: "− ";
}
.page-about .ab-more p {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--ly-mist);
}

/* 认证 */
.page-about .ab-cert {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 12px;
}
.page-about .ab-badge {
  position: relative;
  margin: 0;
  padding: 18px;
  background:
    radial-gradient(circle at 30% 20%, rgba(53, 242, 208, 0.16), transparent 58%),
    var(--ly-deep);
  border: 1px solid rgba(53, 242, 208, 0.35);
  clip-path: polygon(var(--ab-cut-lg) 0, 100% 0, 100% calc(100% - var(--ab-cut-lg)), calc(100% - var(--ab-cut-lg)) 100%, 0 100%, 0 var(--ab-cut-lg));
  outline: none;
}
.page-about .ab-badge img {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
  object-fit: contain;
}
.page-about .ab-badge__cap {
  margin-top: 12px;
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ly-cyan);
}
.page-about .ab-badge__note {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ly-mist);
}
.page-about .ab-cert__list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-cert__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ly-ice);
  border-bottom: 1px dashed rgba(28, 74, 102, 0.7);
}
.page-about .ab-cert__dot {
  flex: 0 0 auto;
  margin-top: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ly-cyan);
}

/* 覆盖 */
.page-about .ab-cover {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.page-about .ab-cover__cell {
  padding: 16px 14px;
  background: linear-gradient(155deg, var(--ly-panel), rgba(10, 34, 56, 0.9));
  border: 1px solid var(--ly-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
}
.page-about .ab-cover__num {
  display: block;
  font-size: clamp(26px, 7vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--ly-cyan);
  font-variant-numeric: tabular-nums;
}
.page-about .ab-cover__name {
  margin: 8px 0 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--ly-ice);
}
.page-about .ab-cover__desc {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ly-mist);
  max-width: none;
}
.page-about .ab-cover__tail {
  font-size: 14px;
}

/* 维护节奏 */
.page-about .ab-cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 24px;
}
.page-about .ab-cadence__item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 14px;
  border-left: 2px solid var(--ly-blue);
  background: rgba(14, 47, 74, 0.5);
}
.page-about .ab-cadence__k {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ly-gold);
}
.page-about .ab-cadence__v {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ly-ice);
}
.page-about .ab-mail {
  font-size: 14px;
}

/* 下一步 */
.page-about .ab-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 24px;
}
.page-about .ab-next__card {
  display: block;
  padding: 20px 18px;
  text-decoration: none;
  color: inherit;
  background: linear-gradient(150deg, rgba(14, 47, 74, 0.85), rgba(4, 18, 31, 0.9));
  border: 1px solid var(--ly-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut-lg)), calc(100% - var(--ab-cut-lg)) 100%, 0 100%);
  transition: border-color 180ms var(--ly-ease), transform 180ms var(--ly-ease);
}
.page-about .ab-next__card:hover,
.page-about .ab-next__card:focus-visible {
  border-color: rgba(53, 242, 208, 0.55);
  transform: translateY(-2px);
}
.page-about .ab-next__title {
  margin: 12px 0 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ly-ice);
}
.page-about .ab-next__card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ly-mist);
}
.page-about .ab-next__go {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--ly-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ly-cyan);
}

/* 交互态 */
.page-about .ly-spy__link.is-active {
  color: var(--ly-cyan);
  border-left-color: var(--ly-cyan);
  background: rgba(53, 242, 208, 0.08);
}

/* 平板 */
@media (min-width: 640px) {
  .page-about .ab-entry__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-cover {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-cert {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    align-items: start;
    gap: 28px;
  }
  .page-about .ab-badge img {
    max-width: none;
  }
  .page-about .ab-hero {
    padding-bottom: 56px;
  }
}

/* 桌面 */
@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 48px;
  }
  .page-about .ab-hero__panel {
    align-self: end;
    margin-bottom: 8px;
  }
  .page-about .ab-team {
    grid-template-columns: minmax(0, 1fr) 380px;
    align-items: start;
    gap: 32px;
  }
  .page-about .ab-team__media {
    margin-top: 20px;
  }
  .page-about .ab-badge__note {
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 180ms var(--ly-ease), transform 180ms var(--ly-ease);
  }
  .page-about .ab-badge:hover .ab-badge__note,
  .page-about .ab-badge:focus-visible .ab-badge__note,
  .page-about .ab-badge:focus-within .ab-badge__note {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 1080px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-spy-w) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .ab-spy {
    display: block;
    position: sticky;
    top: calc(var(--ly-header-offset) + 20px);
    align-self: start;
    padding: 4px 0 16px;
  }
  .page-about .ab-spy__label {
    margin: 0 0 12px;
  }
  .page-about .ab-spy__nav {
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--ly-line);
  }
  .page-about .ly-spy__link {
    display: block;
    padding: 9px 12px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--ly-mist);
    text-decoration: none;
    border-left: 2px solid transparent;
    margin-left: -1px;
    transition: color 180ms var(--ly-ease), background 180ms var(--ly-ease), border-color 180ms var(--ly-ease);
  }
  .page-about .ly-spy__link:hover {
    color: var(--ly-ice);
    background: rgba(28, 74, 102, 0.32);
  }
  .page-about .ab-section {
    padding-top: 52px;
  }
  .page-about .ab-cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-cadence__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-status__dot {
    animation: none;
  }
  .page-about .ab-timeline__card,
  .page-about .ab-next__card,
  .page-about .ab-badge__note {
    transition: none;
  }
}
<<<END>>>