.page-about {
  --about-gold-line: rgba(232, 180, 90, 0.34);
  --about-gold-wash: rgba(232, 180, 90, 0.09);
  --about-mint-line: rgba(79, 224, 193, 0.32);
  --about-mint-wash: rgba(79, 224, 193, 0.08);
  --about-coral-line: rgba(255, 107, 74, 0.32);
  --about-gap: clamp(18px, 3.6vw, 40px);
  color: var(--text);
}

/* ============ 首屏框景 ============ */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 36px) 0 clamp(46px, 8vw, 96px);
  overflow: hidden;
  background:
    radial-gradient(120% 80% at 10% 0%, rgba(42, 30, 74, 0.72) 0%, rgba(11, 27, 43, 0) 62%),
    radial-gradient(90% 70% at 100% 14%, rgba(14, 47, 58, 0.92) 0%, rgba(11, 27, 43, 0) 58%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: clamp(8px, 1.8vw, 20px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  pointer-events: none;
}

.page-about .about-hero .shell {
  position: relative;
  padding-top: clamp(22px, 4vw, 40px);
}

.page-about .about-hero__vlabel {
  display: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(18px, 3vw, 34px);
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 26px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
}

.page-about .about-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-hero__meta-num {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-about .about-hero__meta-label {
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--teal-deep);
}

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

/* ============ 主体双栏 ============ */
.page-about .about-body {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(48px, 8vw, 96px);
  min-width: 0;
}

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

.page-about .about-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-index__label {
  flex: 0 0 auto;
  margin: 0;
  align-self: center;
  padding-right: 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.24em;
  color: var(--slate);
  text-transform: uppercase;
  white-space: nowrap;
}

.page-about .about-index .chapter-index__link {
  flex: 0 0 auto;
  display: block;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-size: 0.84rem;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-index .chapter-index__link:hover {
  color: var(--mist);
  background: rgba(143, 163, 184, 0.12);
}

.page-about .about-index .chapter-index__link.is-active {
  color: var(--gold);
  border-color: var(--about-gold-line);
  background: var(--about-gold-wash);
}

/* ============ 章节通用 ============ */
.page-about .about-section {
  padding: clamp(28px, 5vw, 52px) 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-section__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.42rem, 3.2vw, 2.3rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--mist);
}

.page-about .about-section__body p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-quote {
  margin: 26px 0 0;
  padding: 20px 22px;
  border-left: 3px solid var(--coral);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(42, 30, 74, 0.46);
  font-family: var(--font-display);
  font-size: clamp(1rem, 2vw, 1.18rem);
  line-height: 1.75;
  color: var(--mist);
}

/* ============ 空间 ============ */
.page-about .about-space__figure,
.page-about .about-rights__figure {
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--teal-deep);
}

.page-about .about-space__figure img,
.page-about .about-rights__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-zones {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-zones__item {
  padding: 18px 20px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--teal-deep);
  border-radius: var(--radius-md);
  background: rgba(14, 47, 58, 0.62);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-zones__item:hover {
  border-left-color: var(--mint);
  background: rgba(14, 47, 58, 0.9);
}

.page-about .about-zones__name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--mist);
}

.page-about .about-zones__item p {
  margin: 8px 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ============ 权益 ============ */
.page-about .about-rights__figure {
  border-color: var(--about-gold-line);
  background: linear-gradient(140deg, rgba(90, 31, 46, 0.5), rgba(42, 30, 74, 0.6));
}

.page-about .about-rights {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .right-card {
  border: 1px solid var(--about-gold-line);
  border-radius: var(--pill);
  background: var(--about-gold-wash);
  overflow: hidden;
  transition: border-radius 0.35s var(--ease), background 0.35s var(--ease);
}

.page-about .right-card[open] {
  border-radius: var(--radius-lg);
  background: rgba(232, 180, 90, 0.13);
}

.page-about .right-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  color: var(--gold);
}

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

.page-about .right-card__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--slate);
}

.page-about .right-card[open] .right-card__head::after {
  content: "−";
  color: var(--gold);
}

.page-about .right-card__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .right-card__name {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.page-about .right-card__body {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--mist);
  opacity: 0.88;
}

/* ============ 团队 ============ */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 3.5vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__card {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(170deg, rgba(42, 30, 74, 0.5), rgba(11, 27, 43, 0.5));
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-team__label {
  display: block;
  margin-top: 6px;
  font-size: 0.86rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-team__card p {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-flow {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow__step {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-flow__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--coral);
}

/* ============ 时间线 ============ */
.page-about .about-timeline {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(212px, 76vw);
  gap: 14px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0 0 14px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 30px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(42, 30, 74, 0.44), rgba(11, 27, 43, 0.36));
  scroll-snap-align: start;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 18px;
  right: 18px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--about-gold-line) 0 6px, transparent 6px 12px);
}

.page-about .about-timeline__item:hover {
  border-color: var(--about-gold-line);
  background: linear-gradient(180deg, rgba(42, 30, 74, 0.62), rgba(11, 27, 43, 0.42));
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.12rem;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .about-timeline__phase {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 11px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-about .about-timeline__item p {
  margin: 12px 0 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ============ 伙伴 ============ */
.page-about .about-partners {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 3.5vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__item {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(14, 47, 58, 0.5);
}

.page-about .about-partners__item p {
  margin: 12px 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ============ 开始 ============ */
.page-about .about-start__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3.5vw, 34px);
}

.page-about .about-start__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: rgba(11, 27, 43, 0.72);
  text-decoration: none;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-start__card--mint {
  border-color: var(--about-mint-line);
  background: linear-gradient(160deg, var(--about-mint-wash), rgba(11, 27, 43, 0.72) 62%);
}

.page-about .about-start__card--gold {
  border-color: var(--about-gold-line);
  background: linear-gradient(160deg, var(--about-gold-wash), rgba(11, 27, 43, 0.72) 62%);
}

.page-about .about-start__card--coral {
  border-color: var(--about-coral-line);
  background: linear-gradient(160deg, rgba(255, 107, 74, 0.1), rgba(11, 27, 43, 0.72) 62%);
}

.page-about .about-start__card:hover {
  transform: translateY(-3px);
}

.page-about .about-start__kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--slate);
  text-transform: uppercase;
}

.page-about .about-start__title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-start__go {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--coral);
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-about .about-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-about .about-zones,
  .page-about .about-team,
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-zones__item:nth-child(even) {
    margin-top: 20px;
  }

  .page-about .about-zones {
    padding-bottom: 20px;
  }

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

@media (min-width: 760px) {
  .page-about .about-rights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
  }

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

@media (min-width: 960px) {
  .page-about .about-timeline {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    overflow: visible;
    padding-bottom: 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-body__rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-index {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0 0 0 14px;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .about-index__label {
    padding: 0 0 10px;
    align-self: flex-start;
  }

  .page-about .about-index .chapter-index__link {
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    white-space: normal;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__vlabel {
    display: block;
    position: absolute;
    right: clamp(12px, 2vw, 28px);
    top: 50%;
    transform: translateY(-50%);
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.4em;
    color: var(--slate);
    opacity: 0.65;
    pointer-events: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-start__card,
  .page-about .about-zones__item,
  .page-about .about-timeline__item {
    transition: none;
  }

  .page-about .about-start__card:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>