.page-about {
  background: var(--void);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .pa-eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .13em;
  color: var(--bolt);
  background: rgba(123, 59, 255, .16);
  border: 1px solid rgba(123, 59, 255, .45);
  border-radius: var(--radius);
}

/* ---------- 首屏 ---------- */
.page-about .pa-hero {
  position: relative;
  padding: 104px 0 58px;
  overflow: hidden;
  background:
    radial-gradient(115% 82% at 90% -14%, rgba(123, 59, 255, .34), transparent 62%),
    linear-gradient(180deg, var(--void) 0%, var(--void-deep) 100%);
}

.page-about .pa-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(123, 59, 255, .6) 24%, rgba(43, 231, 231, .45) 70%, transparent);
}

.page-about .pa-hero .tk-crumb {
  margin-bottom: 30px;
  font-size: 12.5px;
}

.page-about .pa-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-about .pa-hero h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 8vw, 56px);
  line-height: 1.14;
  letter-spacing: -.01em;
  max-width: 17em;
}

.page-about .pa-hero__intro {
  margin: 20px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 246, 255, .78);
}

.page-about .pa-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .pa-hero__side {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(42, 27, 87, .62) 0%, rgba(16, 16, 36, .9) 64%);
  box-shadow: 0 16px 36px -24px rgba(123, 59, 255, .85);
}

.page-about .pa-side__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .pa-nodes {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
}

.page-about .pa-nodes a {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 11px 6px;
  border-bottom: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
  transition: background .18s var(--ease), padding-left .18s var(--ease);
}

.page-about .pa-nodes li:last-child a {
  border-bottom: 0;
}

.page-about .pa-nodes a:hover,
.page-about .pa-nodes a:focus-visible {
  background: rgba(123, 59, 255, .18);
  padding-left: 12px;
}

.page-about .pa-nodes__year {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--bolt);
}

.page-about .pa-nodes__txt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 时间轴阶段 ---------- */
.page-about .pa-phase {
  position: relative;
  padding: 46px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}

.page-about .pa-phase__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .pa-phase__year {
  position: relative;
  display: inline-block;
  padding: 12px 32px 14px 16px;
  background: linear-gradient(100deg, rgba(123, 59, 255, .42) 0%, rgba(42, 27, 87, .7) 54%, rgba(42, 27, 87, .05) 100%);
  clip-path: polygon(0 0, 100% 0, calc(100% - 22px) 100%, 0 100%);
}

.page-about .pa-phase__year::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--neon) 0%, var(--volt) 100%);
}

.page-about .pa-phase__year::after {
  content: "";
  position: absolute;
  top: 18px;
  right: 18px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(43, 231, 231, .14);
}

.page-about .pa-year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(46px, 12vw, 68px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--bolt);
}

.page-about .pa-year--sm {
  font-size: clamp(34px, 9vw, 48px);
}

.page-about .pa-phase__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .pa-phase__hover {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding-right: 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  transition: max-height .18s var(--ease), opacity .18s var(--ease), margin-top .18s var(--ease);
}

.page-about .pa-phase__year:hover .pa-phase__hover,
.page-about .pa-phase__year:focus-within .pa-phase__hover {
  max-height: 72px;
  margin-top: 10px;
  opacity: 1;
}

.page-about .pa-phase__body h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 5.4vw, 28px);
  line-height: 1.34;
  letter-spacing: -.005em;
}

.page-about .pa-phase__body > p {
  margin: 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 246, 255, .76);
}

.page-about .pa-points {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 11px;
}

.page-about .pa-points li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(244, 246, 255, .66);
}

.page-about .pa-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 10px;
  height: 1px;
  background: var(--neon);
}

.page-about .pa-points strong {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 图片 ---------- */
.page-about .pa-figure {
  margin: 28px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel-strong);
}

.page-about .pa-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 数据摘要带 ---------- */
.page-about .pa-band {
  position: relative;
  padding: 30px 0;
  background: linear-gradient(96deg, rgba(42, 27, 87, .55) 0%, rgba(16, 16, 36, .9) 58%, rgba(7, 7, 15, .97) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .pa-band__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
}

.page-about .pa-band__cell {
  display: block;
  padding: 20px 22px 22px;
  background: var(--panel-strong);
  border-left: 2px solid transparent;
  color: inherit;
  text-decoration: none;
  transition: background .18s var(--ease), border-left-color .18s var(--ease);
}

.page-about .pa-band__cell:hover,
.page-about .pa-band__cell:focus-visible {
  background: rgba(123, 59, 255, .18);
  border-left-color: var(--neon);
}

.page-about .pa-band__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--neon);
}

.page-about .pa-band__unit {
  margin-left: 5px;
  font-size: 13px;
  font-weight: 500;
  color: var(--mist);
}

.page-about .pa-band__label {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--mist);
}

/* ---------- 对阵双版本 ---------- */
.page-about .pa-versions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 26px;
}

.page-about .pa-versions__card {
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-about .pa-versions__card--official {
  border-top: 2px solid var(--volt);
}

.page-about .pa-versions__card--data {
  border-top: 2px solid var(--neon);
  background: linear-gradient(172deg, rgba(43, 231, 231, .09) 0%, var(--panel) 48%);
}

.page-about .pa-versions__card h3 {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .pa-versions__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(244, 246, 255, .74);
}

/* ---------- 团队 ---------- */
.page-about .pa-team-section {
  padding: 52px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}

.page-about .pa-section__head {
  margin-bottom: 30px;
}

.page-about .pa-section__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--volt);
  margin-bottom: 12px;
}

.page-about .pa-section__head h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(21px, 5.6vw, 30px);
  line-height: 1.32;
}

.page-about .pa-section__head p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 246, 255, .74);
}

.page-about .pa-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .pa-figure--team {
  margin: 0;
}

.page-about .pa-team__lead {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .13em;
  color: var(--mist);
}

.page-about .pa-stack {
  display: grid;
  gap: 15px;
}

.page-about .pa-stack__row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) 48px;
  gap: 12px;
  align-items: center;
}

.page-about .pa-stack__name {
  font-size: 12.5px;
  color: rgba(244, 246, 255, .8);
}

.page-about .pa-stack__track {
  position: relative;
  display: block;
  height: 8px;
  border-radius: 999px;
  background: rgba(35, 37, 68, .95);
  overflow: hidden;
}

.page-about .pa-stack__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  transition: filter .16s var(--ease);
}

.page-about .pa-stack__fill--a {
  background: var(--volt);
}

.page-about .pa-stack__fill--b {
  background: var(--neon);
}

.page-about .pa-stack__fill--c {
  background: var(--bolt);
}

.page-about .pa-stack__row:hover .pa-stack__fill {
  filter: brightness(1.24);
}

.page-about .pa-stack__val {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink);
  text-align: right;
}

/* ---------- 合作 ---------- */
.page-about .pa-partner-section {
  padding: 52px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}

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

.page-about .pa-collab__item {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  background: var(--panel-strong);
  transition: background .18s var(--ease);
}

.page-about .pa-collab__item:hover {
  background: rgba(42, 27, 87, .72);
}

.page-about .pa-collab__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .13em;
  color: var(--bolt);
}

.page-about .pa-collab__v {
  font-size: 14px;
  line-height: 1.72;
  color: rgba(244, 246, 255, .72);
}

.page-about .pa-partner__note {
  margin: 22px 0 0;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 联系收口 ---------- */
.page-about .pa-contact {
  padding: 52px 0 66px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 90px;
}

.page-about .pa-contact__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding: 26px 22px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(123, 59, 255, .24), transparent 58%),
    linear-gradient(180deg, var(--panel) 0%, var(--void-deep) 100%);
}

.page-about .pa-contact__main h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 5.2vw, 28px);
  line-height: 1.34;
}

.page-about .pa-contact__main p {
  margin: 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 246, 255, .75);
}

.page-about .pa-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .pa-contact__list {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .pa-contact__row {
  display: grid;
  gap: 6px;
  padding: 15px 18px;
  background: var(--panel-strong);
}

.page-about .pa-contact__row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .pa-contact__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
  word-break: break-word;
}

.page-about .pa-backtop {
  padding: 0 0 56px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .pa-band__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .pa-versions {
    grid-template-columns: 1.06fr .94fr;
    gap: 22px;
    align-items: start;
  }

  .page-about .pa-versions__card--data {
    margin-top: 32px;
  }

  .page-about .pa-collab__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

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

@media (min-width: 900px) {
  .page-about .pa-hero {
    padding: 132px 0 76px;
  }

  .page-about .pa-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .pa-phase {
    padding: 60px 0;
  }

  .page-about .pa-phase__grid {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .pa-phase__year {
    display: block;
    padding: 18px 34px 20px 18px;
  }

  .page-about .pa-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .pa-contact__panel {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 44px;
    padding: 36px 34px 38px;
  }
}
<<<END>>>