.page-about {
  --about-line: rgba(28, 42, 68, 0.95);
  --about-text-soft: rgba(244, 246, 251, 0.78);
  --about-paper-line: rgba(26, 26, 34, 0.16);
  --about-paper-soft: rgba(26, 26, 34, 0.78);
  background: var(--ink);
  color: var(--fog);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .breadcrumb a {
  color: var(--grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--fog);
  border-bottom-color: var(--blue);
}

.page-about .breadcrumb__sep {
  color: rgba(138, 144, 166, 0.6);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--fog);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(26px, 5vw, 60px)) 0 clamp(44px, 7vw, 84px);
  overflow: hidden;
  background:
    radial-gradient(90% 70% at 88% -10%, rgba(123, 47, 247, 0.34), transparent 62%),
    radial-gradient(60% 60% at 0% 100%, rgba(47, 128, 255, 0.16), transparent 70%),
    var(--ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(90deg, rgba(28, 42, 68, 0.55) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(0deg, rgba(28, 42, 68, 0.4) 0 1px, transparent 1px 84px);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grey);
}

.page-about .about-eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(46, 230, 168, 0.14);
  animation: about-pulse 2.4s ease-in-out infinite;
}

@keyframes about-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-lead {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.8;
  color: var(--about-text-soft);
}

.page-about .hero-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0 0 28px;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-line);
}

.page-about .hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .hero-stats__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1;
  color: var(--yellow);
}

.page-about .hero-stats__label {
  font-size: 11.5px;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-about .about-actions .btn--primary {
  background: var(--purple);
  color: var(--fog);
  box-shadow: 0 16px 34px -20px rgba(123, 47, 247, 0.95);
}

.page-about .about-actions .btn--primary:hover {
  background: #8C46FF;
}

.page-about .about-actions .btn--ghost {
  background: rgba(47, 128, 255, 0.08);
  border-color: rgba(47, 128, 255, 0.6);
  color: var(--fog);
}

.page-about .about-actions .btn--ghost:hover {
  background: rgba(47, 128, 255, 0.2);
}

.page-about .about-hero__media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(123, 47, 247, 0.32);
  background:
    radial-gradient(circle at 30% 20%, rgba(47, 128, 255, 0.25), transparent 60%),
    var(--ink-2);
  box-shadow: var(--glow);
}

.page-about .about-hero__media img {
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .media-frame__caption {
  margin: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--grey);
  border-top: 1px solid var(--about-line);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  background: var(--ink-2);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-index__inner {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-block: 12px;
  scrollbar-width: none;
}

.page-about .about-index__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-index a {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  color: rgba(244, 246, 251, 0.8);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: border-color 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.page-about .about-index a span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--blue);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--blue);
  background: rgba(47, 128, 255, 0.12);
  color: var(--fog);
  outline: none;
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding: clamp(46px, 7vw, 88px) 0;
}

.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .about-sec--paper::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--purple), var(--blue) 58%, var(--yellow));
}

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: clamp(24px, 4vw, 40px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-sec--paper .about-sec__head {
  border-bottom-color: var(--about-paper-line);
}

.page-about .about-sec__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(36px, 7.5vw, 68px);
  line-height: 0.88;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(123, 47, 247, 0.75);
}

.page-about .about-sec--paper .about-sec__num {
  -webkit-text-stroke-color: rgba(42, 17, 80, 0.55);
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-about .about-sec__lead {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text-soft);
  max-width: 52ch;
}

.page-about .about-sec--paper .about-sec__lead {
  color: var(--about-paper-soft);
}

.page-about .about-split {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .about-prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-text-soft);
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-sec--paper .about-prose p {
  color: var(--about-paper-soft);
}

.page-about .about-note {
  padding: 18px 20px;
  border: 1px solid rgba(47, 128, 255, 0.35);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius-sm);
  background: linear-gradient(160deg, rgba(47, 128, 255, 0.14), rgba(18, 24, 38, 0.62));
}

.page-about .about-note__k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
}

.page-about .about-note__v {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--fog);
}

.page-about .about-note__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 246, 251, 0.7);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 4px 0 0 30px;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--purple), var(--blue) 68%, rgba(47, 128, 255, 0));
}

.page-about .about-sec--paper .tl::before {
  background: linear-gradient(180deg, var(--shadow-purple), var(--blue) 68%, rgba(47, 128, 255, 0));
}

.page-about .tl__item {
  position: relative;
  padding-bottom: 22px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--yellow);
  box-shadow: 0 0 0 4px rgba(245, 255, 61, 0.08);
}

.page-about .about-sec--paper .tl__item::before {
  background: var(--paper);
  border-color: var(--purple);
  box-shadow: 0 0 0 4px rgba(123, 47, 247, 0.12);
}

.page-about .tl__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 4.4vw, 30px);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--yellow);
}

.page-about .about-sec--paper .tl__year {
  color: var(--shadow-purple);
}

/* ---------- 折叠 ---------- */
.page-about .fold {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
  background: rgba(18, 24, 38, 0.72);
}

.page-about .fold__summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 14px 44px 14px 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
  color: var(--fog);
}

.page-about .fold__summary::-webkit-details-marker {
  display: none;
}

.page-about .fold__summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--blue);
}

.page-about .fold[open] .fold__summary::after {
  content: "–";
}

.page-about .fold__summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-about .fold__body {
  padding: 0 16px 16px;
}

.page-about .fold__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 246, 251, 0.76);
}

.page-about .about-sec--paper .fold {
  background: rgba(255, 255, 255, 0.58);
  border-color: var(--about-paper-line);
}

.page-about .about-sec--paper .fold__summary {
  color: var(--paper-ink);
}

.page-about .about-sec--paper .fold__summary::after {
  color: var(--purple);
}

.page-about .about-sec--paper .fold__body p {
  color: var(--about-paper-soft);
}

/* ---------- 章节配图 ---------- */
.page-about .about-sec__media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--about-line);
  background: var(--ink-2);
}

.page-about .about-sec__media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-sec--paper .about-sec__media {
  border-color: var(--about-paper-line);
  background: rgba(255, 255, 255, 0.6);
}

.page-about .about-sec--paper .media-frame__caption {
  border-top-color: var(--about-paper-line);
  color: rgba(26, 26, 34, 0.62);
}

.page-about .about-sec__media--crew {
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-sec__media--crew img {
  aspect-ratio: 10 / 7;
}

/* ---------- 四级赛事 ---------- */
.page-about .tiers {
  display: grid;
  gap: 14px;
}

.page-about .tier {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 20px 20px 20px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--about-line);
  background: linear-gradient(150deg, rgba(18, 24, 38, 0.95), rgba(14, 14, 18, 0.6));
}

.page-about .tier::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 3px;
  background: var(--purple);
}

.page-about .tier:nth-child(2)::before {
  background: var(--blue);
}

.page-about .tier:nth-child(3)::before {
  background: var(--green);
}

.page-about .tier:nth-child(4)::before {
  background: var(--yellow);
}

.page-about .tier__code {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--grey);
}

.page-about .tier__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--fog);
}

.page-about .tier__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(244, 246, 251, 0.76);
}

.page-about .tier__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--blue);
}

.page-about .about-foot {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--grey);
}

.page-about .about-foot a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 128, 255, 0.5);
}

.page-about .about-foot a:hover {
  border-bottom-color: var(--blue);
}

/* ---------- 团队 ---------- */
.page-about .crew {
  display: grid;
  gap: 14px;
}

.page-about .crew__card {
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--about-paper-line);
  background: rgba(255, 255, 255, 0.55);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.page-about .crew__card:hover,
.page-about .crew__card:focus,
.page-about .crew__card:focus-within {
  transform: translateY(-3px);
  background: #FFFFFF;
  box-shadow: 0 18px 36px -26px rgba(42, 17, 80, 0.8);
  outline: none;
}

.page-about .crew__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--paper-ink);
}

.page-about .crew__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-paper-soft);
}

.page-about .crew__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .crew__tags li {
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid rgba(123, 47, 247, 0.4);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #4A1E9E;
}

/* ---------- 区域覆盖 ---------- */
.page-about .cover {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .cover__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 20px;
  padding: 0;
}

.page-about .cover__stats li {
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--about-line);
  background: rgba(18, 24, 38, 0.7);
}

.page-about .cover__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  color: var(--yellow);
}

.page-about .cover__label {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--grey);
}

.page-about .cover__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-text-soft);
}

.page-about .cover__text:last-child {
  margin-bottom: 0;
}

.page-about .cover__text a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 128, 255, 0.5);
}

.page-about .cover__text a:hover {
  border-bottom-color: var(--blue);
}

.page-about .about-facts {
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid rgba(123, 47, 247, 0.34);
  background: linear-gradient(160deg, rgba(123, 47, 247, 0.16), rgba(14, 14, 18, 0.62));
  box-shadow: var(--glow);
}

.page-about .about-facts__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog);
}

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

.page-about .about-facts__row {
  padding: 12px 0;
  border-top: 1px solid rgba(28, 42, 68, 0.95);
}

.page-about .about-facts__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-facts__row dt {
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--grey);
}

.page-about .about-facts__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fog);
  word-break: break-word;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  padding: clamp(46px, 6vw, 78px) 0;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(123, 47, 247, 0.9), rgba(47, 128, 255, 0.7) 62%, rgba(47, 128, 255, 0.15));
  clip-path: polygon(0 9%, 100% 0, 100% 91%, 0 100%);
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 18px;
  align-items: center;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.8vw, 34px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 246, 251, 0.88);
}

.page-about .about-cta__btn {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid rgba(244, 246, 251, 0.32);
  background: var(--ink);
  color: var(--fog);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-about .about-cta__btn:hover {
  background: #1B1230;
  border-color: var(--yellow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .crew {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .tiers {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 28px;
  }
}

@media (hover: hover) and (min-width: 760px) {
  .page-about .crew__tags {
    opacity: 0;
    transform: translateY(4px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .page-about .crew__card:hover .crew__tags,
  .page-about .crew__card:focus .crew__tags,
  .page-about .crew__card:focus-within .crew__tags {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: center;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-about .cover {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (max-width: 480px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }

  .page-about .hero-stats__num {
    font-size: 22px;
  }

  .page-about .about-sec__head {
    gap: 10px;
  }

  .page-about .tl {
    padding-left: 24px;
  }

  .page-about .tl__item::before {
    left: -23px;
    width: 10px;
    height: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-eyebrow .dot {
    animation: none;
  }

  .page-about .crew__card,
  .page-about .crew__tags,
  .page-about .about-index a {
    transition: none;
  }

  .page-about .crew__card:hover {
    transform: none;
  }
}
<<<END>>>