.page-about {
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 26px 0 46px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -8vw;
  width: min(48vw, 580px);
  height: 340px;
  background:
    linear-gradient(135deg, rgba(255, 106, 42, 0.5), rgba(255, 106, 42, 0) 62%),
    linear-gradient(225deg, rgba(43, 228, 208, 0.22), rgba(43, 228, 208, 0) 72%);
  clip-path: polygon(30% 0, 100% 0, 100% 76%, 0 100%);
  opacity: 0.9;
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 22px;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 6.6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--mist);
}

.page-about .about-hero h1 em {
  position: relative;
  font-style: normal;
  color: var(--orange);
}

.page-about .about-hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.04em;
  height: 7px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 106, 42, 0));
  opacity: 0.4;
  border-radius: 4px;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: rgba(233, 240, 247, 0.78);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
}

.page-about .fact {
  padding: 16px 14px;
  background: linear-gradient(160deg, rgba(20, 49, 79, 0.88), rgba(7, 17, 31, 0.94));
}

.page-about .fact__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .fact__label {
  display: block;
  margin-top: 5px;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--steel);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-flow {
  padding-bottom: 10px;
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  column-gap: 14px;
  padding-top: 46px;
}

.page-about .about-chapter__aside {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.page-about .about-chapter__num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-chapter__tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-about .about-chapter__rule {
  flex: 1 1 auto;
  width: 1px;
  min-height: 44px;
  background: linear-gradient(180deg, var(--cyan), rgba(43, 228, 208, 0.04));
}

.page-about .about-chapter__body {
  min-width: 0;
}

.page-about .about-chapter__body h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.8vw, 2.25rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-text {
  max-width: 34em;
}

.page-about .about-text p {
  margin: 0 0 14px;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: rgba(233, 240, 247, 0.78);
}

.page-about .about-text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 228, 208, 0.45);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-text a:hover,
.page-about .about-text a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 玻璃旁注 ---------- */
.page-about .about-aside {
  max-width: 34em;
  margin-top: 22px;
  padding: 16px 18px;
  background: linear-gradient(140deg, rgba(20, 49, 79, 0.72), rgba(7, 17, 31, 0.5));
  border-left: 2px solid var(--cyan);
  backdrop-filter: blur(6px);
}

.page-about .about-aside__label {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-aside p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(233, 240, 247, 0.76);
}

/* ---------- 流程步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  max-width: 40em;
}

.page-about .about-steps > li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-steps > li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .step-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  transition: color 0.2s var(--ease);
}

.page-about .about-steps > li:hover .step-num {
  color: var(--orange);
}

.page-about .step-body strong {
  display: block;
  margin-bottom: 5px;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .step-body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 24px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* ---------- 折叠旁注 ---------- */
.page-about .about-note {
  max-width: 40em;
  margin-top: 24px;
  padding: 15px 18px;
  background: linear-gradient(140deg, rgba(20, 49, 79, 0.72), rgba(7, 17, 31, 0.55));
  border-left: 2px solid var(--violet);
  backdrop-filter: blur(6px);
}

.page-about .about-note summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--mist);
}

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

.page-about .about-note summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--violet);
}

.page-about .about-note[open] summary::before {
  content: "–";
}

.page-about .about-note p {
  margin: 12px 0 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 场馆全宽带 ---------- */
.page-about .about-band {
  display: grid;
  margin-top: 34px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--orange);
  background: var(--ink-2);
}

.page-about .about-band__media {
  min-width: 0;
}

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

.page-about .about-band__panel {
  padding: 26px 22px 28px;
}

.page-about .about-band__panel h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .field-list {
  margin: 16px 0 0;
  padding: 0;
}

.page-about .field-list > div {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .field-list > div:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-about .field-list dt {
  font-size: 0.875rem;
  color: var(--mist);
}

.page-about .field-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline-layout {
  display: grid;
  gap: 28px;
  margin-top: 22px;
}

.page-about .tl {
  list-style: none;
  max-width: 38em;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--line);
}

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

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .tl__item:hover::before,
.page-about .tl__item:focus-within::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 42, 0.16);
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  transition: color 0.2s var(--ease);
}

.page-about .tl__item:hover .tl__year {
  color: var(--orange);
}

.page-about .tl__title {
  display: block;
  margin-top: 5px;
  font-size: 1rem;
  color: var(--mist);
}

.page-about .tl__desc {
  margin: 6px 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  display: grid;
  margin-top: 20px;
  max-width: 54em;
}

.page-about .aud {
  padding: 18px 0 16px;
  border-top: 1px solid var(--line-soft);
}

.page-about .aud:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .aud__k {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.page-about .aud h3 {
  margin: 7px 0 6px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .aud p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 团队与协作 ---------- */
.page-about .team-roles {
  list-style: none;
  max-width: 34em;
  margin: 20px 0 22px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-roles li {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr) 2.4em;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
}

.page-about .team-roles__name {
  color: var(--steel);
}

.page-about .team-roles__track {
  display: block;
  height: 6px;
  background: rgba(124, 140, 163, 0.18);
  border-radius: 3px;
  overflow: hidden;
}

.page-about .team-roles__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-about .team-roles__fill--edit {
  width: 43%;
}

.page-about .team-roles__fill--tech {
  width: 33%;
}

.page-about .team-roles__fill--ops {
  width: 24%;
}

.page-about .team-roles__num {
  font-family: var(--font-mono);
  text-align: right;
  color: var(--mist);
}

.page-about .about-net {
  margin: 24px 0 0;
  border: 1px solid var(--line);
  background: radial-gradient(circle at 50% 45%, rgba(122, 92, 255, 0.16), rgba(7, 17, 31, 0) 62%);
}

.page-about .about-net svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-net text {
  font-family: var(--font-body);
}

.page-about .about-net figcaption {
  padding: 0 14px 14px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 22px;
  margin-top: 54px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.2vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 32em;
  font-size: 1rem;
  line-height: 1.72;
  color: var(--steel);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 860px) {
  .page-about .about-hero {
    padding: 34px 0 62px;
  }

  .page-about .about-chapter {
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: 32px;
    padding-top: 68px;
  }

  .page-about .about-chapter__tag {
    writing-mode: vertical-rl;
    text-orientation: mixed;
  }

  .page-about .about-chapter__num {
    font-size: 0.875rem;
  }

  .page-about .about-band__panel {
    padding: 34px 30px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.92fr);
    align-items: end;
    gap: 44px;
    margin-top: 30px;
  }

  .page-about .about-band {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }

  .page-about .about-band__media img {
    height: 100%;
    max-height: 440px;
  }

  .page-about .about-band__panel {
    border-left: 1px solid var(--line);
  }

  .page-about .about-timeline-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: 42px;
  }

  .page-about .about-audience {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 36px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    margin-top: 68px;
    padding-top: 36px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero h1 {
    max-width: 15em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-text a,
  .page-about .step-num,
  .page-about .tl__year,
  .page-about .tl__item::before {
    transition: none;
  }
}
<<<END>>>