.page-about {
  --about-line: rgba(185, 203, 216, 0.16);
  --about-line-strong: rgba(53, 224, 208, 0.4);
  --about-ink-soft: rgba(26, 18, 11, 0.76);
}

.page-about .about-crumb {
  padding-top: 18px;
}

.page-about .about-crumb .breadcrumb {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 58px) 0 clamp(30px, 5vw, 62px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -15% auto;
  height: 150%;
  background:
    radial-gradient(58% 62% at 82% 8%, rgba(53, 224, 208, 0.22), transparent 66%),
    radial-gradient(46% 52% at 10% 22%, rgba(255, 107, 74, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(185, 203, 216, 0.07) 0 1px, transparent 1px 74px),
    repeating-linear-gradient(0deg, rgba(185, 203, 216, 0.05) 0 1px, transparent 1px 74px);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 82%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.85), transparent 82%);
  pointer-events: none;
}

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

.page-about .about-hero__tag {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(28px, 5.6vw, 52px);
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  max-width: 620px;
}

.page-about .hero-stats__item {
  position: relative;
  padding: 14px 12px 14px 14px;
  border-radius: var(--r-m);
  background: linear-gradient(150deg, rgba(18, 58, 84, 0.95), rgba(12, 38, 59, 0.85));
  border: 1px solid var(--about-line);
}

.page-about .hero-stats__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 3px;
  background: var(--cyan);
}

.page-about .hero-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 32px);
  letter-spacing: 0.05em;
  color: var(--cyan-soft);
}

.page-about .hero-stats__txt {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--mist);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: block;
  padding-bottom: clamp(40px, 7vw, 84px);
}

.page-about .about-toc {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 0 14px;
  margin-bottom: 10px;
  scrollbar-width: thin;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  flex: 0 0 auto;
  padding: 8px 13px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: rgba(12, 38, 59, 0.6);
  color: var(--mist);
  text-decoration: none;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .about-toc__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color 0.24s var(--ease);
}

.page-about .about-toc__label {
  font-size: 13px;
  white-space: nowrap;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-color: var(--about-line-strong);
  color: var(--cream);
}

.page-about .about-toc__link.is-active {
  border-color: var(--about-line-strong);
  background: rgba(53, 224, 208, 0.1);
  color: var(--cream);
}

.page-about .about-toc__link.is-active .about-toc__no {
  color: var(--sand);
}

.page-about .about-sec {
  scroll-margin-top: 110px;
  padding-top: clamp(28px, 5vw, 48px);
}

.page-about .about-sec + .about-sec {
  margin-top: clamp(34px, 6vw, 68px);
  border-top: 1px solid var(--about-line);
}

.page-about .sec-head {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .sec-no {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--sand);
}

.page-about .sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.3;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .sec-lede {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .sec-note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--about-line-strong);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .sec-note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 图片 ---------- */
.page-about .about-photo {
  margin: 0;
  border-radius: var(--r-m);
  overflow: hidden;
  background: var(--night);
  border: 1px solid var(--about-line);
}

.page-about .about-photo img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-photo--wide img {
  aspect-ratio: 14 / 9;
}

.page-about .about-photo--tall img {
  aspect-ratio: 4 / 3;
}

.page-about .about-photo__cap {
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  background: rgba(7, 26, 43, 0.72);
}

/* ---------- 阶段卡片 ---------- */
.page-about .stage-list {
  display: grid;
  gap: 12px;
}

.page-about .stage {
  border-radius: var(--r-l);
  background: var(--night);
  border: 1px solid var(--about-line);
  overflow: hidden;
  transition: border-color 0.28s var(--ease);
}

.page-about .stage:hover {
  border-color: var(--about-line-strong);
}

.page-about .stage--cream {
  background: var(--cream);
  border-color: transparent;
  color: var(--ink);
}

.page-about .stage__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .stage__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--sand);
  white-space: nowrap;
}

.page-about .stage--cream .stage__no {
  color: #8a5a1f;
}

.page-about .stage__title {
  font-family: var(--font-display);
  font-size: 16.5px;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .stage--cream .stage__title {
  color: var(--ink);
}

.page-about .stage__cue {
  position: relative;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid currentColor;
  color: var(--cyan);
  opacity: 0.75;
  flex: 0 0 auto;
}

.page-about .stage--cream .stage__cue {
  color: #8a5a1f;
}

.page-about .stage__cue::before,
.page-about .stage__cue::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-about .stage__cue::before {
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-about .stage__cue::after {
  top: 5px;
  bottom: 5px;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
  transition: opacity 0.24s var(--ease);
}

.page-about .stage[open] .stage__cue::after {
  opacity: 0;
}

.page-about .stage__body {
  padding: 0 18px 20px;
  display: grid;
  gap: 16px;
}

.page-about .stage__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .stage--cream .stage__body p {
  color: var(--about-ink-soft);
}

.page-about .stage__list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .stage__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .stage--cream .stage__list li {
  color: var(--about-ink-soft);
}

.page-about .stage__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 2px;
  background: var(--coral);
}

.page-about .stage--cream .about-photo {
  border-color: rgba(26, 18, 11, 0.16);
}

.page-about .stage--cream .about-photo__cap {
  background: rgba(26, 18, 11, 0.06);
  color: var(--about-ink-soft);
}

/* ---------- 场馆 ---------- */
.page-about .about-photo--wide {
  margin-bottom: 18px;
}

.page-about .venue-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .venue-chip {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: rgba(12, 38, 59, 0.7);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease), background 0.24s var(--ease);
}

.page-about .venue-chip:hover,
.page-about .venue-chip:focus-visible {
  border-color: var(--cyan);
  color: var(--cream);
  background: rgba(53, 224, 208, 0.12);
}

.page-about .venue-panel {
  display: none;
  padding: 18px 18px 18px 20px;
  border-radius: var(--r-m);
  background: var(--surface);
  border-left: 3px solid var(--coral);
}

.page-about .venue-panel:first-child {
  display: block;
}

.page-about .venue-zone:has(.venue-panel:target) .venue-panel:first-child {
  display: none;
}

.page-about .venue-panel:target {
  display: block;
  animation: about-fade 0.3s var(--ease) both;
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.page-about .venue-panel__name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.06em;
  color: var(--cream);
}

.page-about .venue-panel__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .venue-panel__meta {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sand);
}

/* ---------- 分类 ---------- */
.page-about .cat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .cat-item {
  padding: 16px 14px;
  border-radius: var(--r-m);
  background: linear-gradient(160deg, rgba(18, 58, 84, 0.92), rgba(12, 38, 59, 0.92));
  border: 1px solid var(--about-line);
  transition: border-color 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-about .cat-item:hover {
  border-color: var(--about-line-strong);
  transform: translateY(-2px);
}

.page-about .cat-item__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: var(--cyan);
  border: 1px solid rgba(53, 224, 208, 0.34);
  background: radial-gradient(circle at 30% 25%, rgba(53, 224, 208, 0.22), transparent 72%);
}

.page-about .cat-item__name {
  margin: 12px 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--cream);
}

.page-about .cat-item__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 节奏（奶油纸） ---------- */
.page-about .about-band--cream {
  padding: clamp(20px, 4vw, 38px);
  border-radius: var(--r-l);
  background: var(--cream);
  color: var(--ink);
}

.page-about .sec-head--in-band {
  margin-bottom: 22px;
}

.page-about .sec-no--ink {
  color: #8a5a1f;
}

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

.page-about .sec-lede--ink {
  color: var(--about-ink-soft);
}

.page-about .rhythm {
  margin: 0;
  padding: 0 0 0 20px;
  list-style: none;
  border-left: 2px solid rgba(26, 18, 11, 0.16);
  display: grid;
  gap: 20px;
}

.page-about .rhythm__step {
  position: relative;
}

.page-about .rhythm__step::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--coral);
}

.page-about .rhythm__when {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: #8a5a1f;
}

.page-about .rhythm__what {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

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

.page-about .band-note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .band-note a {
  color: #9a3b21;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: 18px;
}

.page-about .team-side__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-stat {
  padding: 14px 14px 16px;
  border-radius: var(--r-m);
  background: var(--night);
  border: 1px solid var(--about-line);
}

.page-about .team-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 3.6vw, 26px);
  letter-spacing: 0.03em;
  color: var(--sand);
}

.page-about .team-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .team-side__note {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--about-line-strong);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .team-side__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 12px;
}

.page-about .partner-card {
  padding: 20px 18px;
  border-radius: var(--r-l);
  background: linear-gradient(155deg, rgba(23, 68, 95, 0.95), rgba(12, 38, 59, 0.95));
  border: 1px solid var(--about-line);
}

.page-about .partner-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 42px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
}

.page-about .partner-card__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .partner-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .partner-card--wide {
  background: linear-gradient(150deg, rgba(255, 107, 74, 0.16), rgba(12, 38, 59, 0.95) 62%);
  border-color: rgba(255, 107, 74, 0.32);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  display: grid;
  gap: 10px;
  margin-top: clamp(22px, 4vw, 34px);
}

.page-about .about-next__card {
  display: grid;
  gap: 6px;
  padding: 18px;
  border-radius: var(--r-m);
  border: 1px solid var(--about-line);
  background: rgba(7, 26, 43, 0.6);
  text-decoration: none;
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease), transform 0.26s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 224, 208, 0.08);
  transform: translateY(-2px);
}

.page-about .about-next__kicker {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--sand);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-size: 16.5px;
  letter-spacing: 0.04em;
  color: var(--cream);
}

.page-about .about-next__text {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .partner-card--wide {
    grid-column: 1 / -1;
  }

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

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

@media (min-width: 760px) {
  .page-about .stage__summary {
    padding: 18px 22px;
  }

  .page-about .stage__body {
    padding: 0 22px 24px;
  }

  .page-about .stage__body--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
    align-items: start;
    gap: 22px;
  }

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

@media (min-width: 940px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    gap: clamp(24px, 3.6vw, 52px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 108px;
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
    gap: 2px;
    padding: 0 0 0 12px;
    margin-bottom: 0;
    border-left: 1px solid var(--about-line);
  }

  .page-about .about-toc__link {
    border: 0;
    border-radius: 0;
    background: transparent;
    padding: 9px 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 3px;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible,
  .page-about .about-toc__link.is-active {
    background: transparent;
  }

  .page-about .about-toc__label {
    font-size: 12px;
    color: var(--mist);
    white-space: normal;
    transition: color 0.24s var(--ease);
  }

  .page-about .about-toc__link.is-active .about-toc__label {
    color: var(--cream);
  }

  .page-about .about-sec {
    padding-top: 0;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

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

  .page-about .partner-card--wide {
    grid-column: auto;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    max-width: 22ch;
  }

  .page-about .stage__body--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
    gap: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .venue-panel:target {
    animation: none;
  }

  .page-about .cat-item:hover,
  .page-about .about-next__card:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>