.page-about {
  --about-step: clamp(3.5rem, 8vw, 7rem);
  --about-rule: 1px solid var(--line);
  --about-grid-gap: clamp(1.5rem, 4vw, 3rem);
  background: var(--arena-deep);
  color: var(--cream);
  overflow-x: clip;
  padding-bottom: clamp(2rem, 6vw, 4rem);
}

.page-about .breadcrumb {
  padding-top: clamp(0.9rem, 3vw, 1.6rem);
  margin-bottom: clamp(1.4rem, 4vw, 2.4rem);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

/* ---- 封面 ---- */

.page-about .cvr {
  padding-bottom: var(--about-step);
  border-bottom: var(--about-rule);
  position: relative;
}

.page-about .cvr::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 90% at 92% 6%, rgba(255, 77, 46, 0.16), transparent 58%),
    radial-gradient(90% 70% at 6% 96%, rgba(53, 240, 200, 0.12), transparent 62%);
  pointer-events: none;
}

.page-about .cvr__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-grid-gap);
}

.page-about .cvr__tag {
  margin: 0 0 clamp(1rem, 3vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .cvr__h1 {
  margin: 0 0 clamp(1.1rem, 3vw, 1.9rem);
  max-width: 16ch;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 7.4vw, 4.9rem);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .cvr__h1 em {
  font-style: normal;
  color: var(--blaze);
  display: inline-block;
  padding-bottom: 0.06em;
  border-bottom: 0.14em solid var(--neon);
}

.page-about .cvr__lead {
  margin: 0;
  max-width: 38em;
  font-size: clamp(1rem, 1.25vw, 1.1rem);
  line-height: 1.82;
  color: var(--cream-dim);
}

.page-about .cvr__stats {
  list-style: none;
  margin: clamp(2rem, 5vw, 2.9rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(0.9rem, 2.4vw, 1.5rem);
}

.page-about .cvr__stat {
  padding-left: 0.9rem;
  border-left: 2px solid var(--line);
}

.page-about .cvr__stat .figure {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4.4vw, 2.7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .figure--volt {
  color: var(--volt);
}

.page-about .figure--blaze {
  color: var(--blaze);
}

.page-about .cvr__unit {
  margin-left: 0.12em;
  font-size: 0.55em;
}

.page-about .cvr__stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--steel);
}

.page-about .cvr__side {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: flex-end;
  padding-top: 0.4rem;
  min-height: 2.6rem;
}

.page-about .cvr__side .vlabel {
  color: var(--steel);
  font-family: var(--font-mono);
  letter-spacing: 0.22em;
}

.page-about .cvr__side .vlabel--alt {
  color: var(--neon);
}

/* ---- 章节框架 ---- */

.page-about .chapter {
  position: relative;
  padding: var(--about-step) 0;
  border-bottom: var(--about-rule);
}

.page-about .chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-grid-gap);
  align-items: start;
}

.page-about .chapter__index {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .chapter__h2 {
  margin: 0 0 clamp(0.9rem, 2.5vw, 1.4rem);
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.4vw, 2.7rem);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--cream);
}

.page-about .chapter__intro {
  margin: 0;
  max-width: 38em;
  font-size: clamp(0.96rem, 1.15vw, 1.05rem);
  line-height: 1.82;
  color: var(--cream-dim);
}

.page-about .chapter__media {
  margin: 0;
}

.page-about .chapter__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  object-fit: cover;
  background: var(--panel);
}

.page-about .chapter__caption {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--steel);
}

/* ---- 时间线 ---- */

.page-about .timeline {
  list-style: none;
  margin: clamp(2.2rem, 5vw, 3.4rem) 0 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
  padding: 1.2rem 0 1.3rem 1.1rem;
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.55rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--steel);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .timeline__item:hover,
.page-about .timeline__item:focus-within {
  background: rgba(53, 240, 200, 0.05);
  padding-left: 1.4rem;
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--neon);
  box-shadow: 0 0 0 4px rgba(53, 240, 200, 0.18);
}

.page-about .timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  font-weight: 800;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 42em;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

/* ---- 团队 ---- */

.page-about .team-list {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.6rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .team-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  column-gap: 1.1rem;
  align-items: baseline;
  padding: clamp(1rem, 2.6vw, 1.4rem);
  background: var(--arena-mid);
}

.page-about .team-item .figure {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}

.page-about .team-item__name {
  grid-area: name;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--neon);
  letter-spacing: 0.02em;
}

.page-about .team-item__desc {
  grid-area: desc;
  margin-top: 0.32rem;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--cream-dim);
}

/* ---- 版本 ---- */

.page-about .chapter__head--wide {
  max-width: 46rem;
}

.page-about .version-grid {
  margin-top: clamp(2rem, 4.5vw, 3rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.5vw, 1.6rem);
}

.page-about .version-card {
  position: relative;
  padding: clamp(1.2rem, 3vw, 1.8rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  outline: none;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .version-card::after {
  content: "";
  position: absolute;
  left: clamp(1.2rem, 3vw, 1.8rem);
  right: clamp(1.2rem, 3vw, 1.8rem);
  top: 0;
  height: 2px;
  background: var(--neon);
  transform: scaleX(0.14);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.page-about .version-card--alt::after {
  background: var(--volt);
}

.page-about .version-card--volt::after {
  background: var(--blaze);
}

.page-about .version-card:hover,
.page-about .version-card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(53, 240, 200, 0.4);
}

.page-about .version-card:hover::after,
.page-about .version-card:focus-visible::after {
  transform: scaleX(1);
}

.page-about .version-card:focus-visible {
  box-shadow: 0 0 0 3px rgba(53, 240, 200, 0.4);
}

.page-about .version-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
}

.page-about .version-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.7vw, 1.24rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--cream);
}

.page-about .version-card__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .version-card--alt .version-card__tag {
  color: var(--volt);
}

.page-about .version-card--volt .version-card__tag {
  color: var(--blaze);
}

.page-about .version-card__desc {
  margin: 0 0 1rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--cream-dim);
}

.page-about .version-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px dashed var(--line-soft);
  padding-top: 0.9rem;
}

.page-about .version-card__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.86rem;
  line-height: 1.9;
  color: var(--steel);
}

.page-about .version-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 0.42rem;
  height: 0.42rem;
  background: currentColor;
  opacity: 0.7;
}

.page-about .version-figure {
  margin: clamp(2rem, 4vw, 2.8rem) 0 0;
}

.page-about .version-note {
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--cream-dim);
  max-width: 44em;
}

.page-about .version-note a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .version-note a:hover {
  color: var(--blaze);
}

/* ---- 合作与荣誉 ---- */

.page-about .partner-grid {
  list-style: none;
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.6rem, 2vw, 1rem);
}

.page-about .partner-cell {
  padding: clamp(0.85rem, 2.4vw, 1.2rem);
  border-top: 2px solid var(--blaze);
  background: var(--arena-mid);
}

.page-about .partner-cell .figure {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cream);
}

.page-about .partner-cell__name {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.82rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-about .chapter__aside {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.5vw, 1.4rem);
}

.page-about .honor {
  padding: clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .honor__label,
.page-about .numbers__label {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-about .numbers__label {
  color: var(--ink);
}

.page-about .honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .honor__item + .honor__item {
  margin-top: 1.2rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.page-about .honor__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--volt);
}

.page-about .honor__title {
  margin: 0.4rem 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .honor__desc {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--cream-dim);
}

.page-about .numbers {
  padding: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--ink);
}

.page-about .numbers__list {
  margin: 0;
}

.page-about .numbers__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(27, 21, 18, 0.14);
}

.page-about .numbers__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .numbers__row dt {
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: rgba(27, 21, 18, 0.72);
}

.page-about .numbers__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .numbers__row .mono {
  font-size: 1.5rem;
}

/* ---- 服务范围 ---- */

.page-about .coverage {
  max-width: 62rem;
}

.page-about .coverage__h2 {
  max-width: 26ch;
}

.page-about .coverage__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(0.96rem, 1.15vw, 1.05rem);
  line-height: 1.82;
  color: var(--cream-dim);
}

.page-about .coverage__lead a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-about .coverage__lead a:hover {
  color: var(--blaze);
}

.page-about .coverage__paths {
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .coverage__path {
  display: block;
  padding: clamp(1.1rem, 3vw, 1.5rem);
  background: var(--arena-mid);
  text-decoration: none;
  transition: background 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-about .coverage__path:hover,
.page-about .coverage__path:focus-visible {
  background: var(--panel);
  padding-left: clamp(1.4rem, 3.6vw, 1.9rem);
  outline: none;
}

.page-about .coverage__path:focus-visible {
  box-shadow: inset 0 0 0 2px var(--neon);
}

.page-about .coverage__path-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .coverage__path-title {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-display);
  font-size: clamp(1.02rem, 1.6vw, 1.2rem);
  font-weight: 800;
  line-height: 1.4;
  color: var(--neon);
}

.page-about .coverage__path-desc {
  display: block;
  margin-top: 0.4rem;
  max-width: 34em;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--cream-dim);
}

/* ---- 收束横幅 ---- */

.page-about .about-close {
  margin-top: clamp(3rem, 7vw, 5rem);
  padding: clamp(2rem, 5vw, 3rem) 0;
}

.page-about .about-close__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.2rem, 3vw, 2rem);
  align-items: center;
}

.page-about .about-close__text {
  margin: 0;
  max-width: 40em;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.1vw, 1.4rem);
  font-weight: 700;
  line-height: 1.62;
  color: var(--arena-deep);
}

.page-about .about-close__btn {
  justify-self: start;
}

/* ---- 响应式 ---- */

@media (min-width: 46rem) {
  .page-about .cvr__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .timeline__item {
    grid-template-columns: minmax(4.5rem, 6rem) minmax(0, 1fr);
    gap: 1.6rem;
    align-items: baseline;
    padding-left: 1.4rem;
  }

  .page-about .timeline__item:hover,
  .page-about .timeline__item:focus-within {
    padding-left: 1.8rem;
  }

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

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

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

  .page-about .about-close__inner {
    grid-template-columns: minmax(0, 1.6fr) auto;
  }

  .page-about .about-close__btn {
    justify-self: end;
  }
}

@media (min-width: 64rem) {
  .page-about .cvr__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.55fr);
    align-items: end;
  }

  .page-about .cvr__side {
    justify-content: flex-end;
    padding-bottom: 0.6rem;
  }

  .page-about .chapter__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-about .chapter__grid--rev {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-about .chapter__grid--rev .chapter__head {
    order: 2;
  }

  .page-about .chapter__grid--rev .chapter__media {
    order: 1;
  }

  .page-about .version-figure {
    max-width: 62rem;
  }
}

@media (min-width: 80rem) {
  .page-about .cvr__grid {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 0.5fr);
  }

  .page-about .chapter--origin .chapter__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .version-card,
  .page-about .timeline__item,
  .page-about .coverage__path,
  .page-about .version-card::after {
    transition: none;
  }

  .page-about .version-card:hover,
  .page-about .version-card:focus-visible {
    transform: none;
  }
}
<<<END>>>