.page-about {
  --about-panel: rgba(11, 46, 89, .52);
  --about-hair: rgba(158, 179, 199, .16);
  background: var(--night);
  color: var(--white);
  overflow-x: hidden;
}

.page-about .about-crumb-wrap {
  padding-top: clamp(12px, 2vw, 20px);
}

.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 36px) 0 clamp(34px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(20, 103, 196, .38), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, #08182a 68%, var(--night) 100%);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: 16%;
  width: 48%;
  height: 60%;
  background: linear-gradient(118deg, rgba(201, 255, 61, .14), rgba(11, 85, 99, .34) 55%, transparent 88%);
  transform: skewY(-6deg);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 5vw, 48px);
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.7rem);
  line-height: 1.12;
  letter-spacing: -.012em;
  margin: 10px 0 18px;
  max-width: 20ch;
}

.page-about .about-hero-copy .lede {
  color: var(--mist);
  font-size: clamp(.98rem, 2.3vw, 1.08rem);
  line-height: 1.8;
  max-width: 58ch;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-board {
  align-self: end;
  padding: 20px 22px 8px;
  background: var(--about-panel);
  border-left: 3px solid var(--lime);
  border-top: 1px solid var(--about-hair);
}

.page-about .board-label {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 14px;
}

.page-about .board-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .board-list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--about-hair);
}

.page-about .board-list li:last-child {
  border-bottom: 0;
}

.page-about .board-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.35rem, 3.2vw, 1.75rem);
  line-height: 1;
  color: var(--info);
  min-width: 4.4em;
}

.page-about .board-text {
  font-size: .82rem;
  color: var(--mist);
  line-height: 1.5;
}

.page-about .about-section {
  position: relative;
  padding: clamp(42px, 8vw, 92px) 0;
}

.page-about .about-split {
  display: grid;
  gap: clamp(16px, 3vw, 34px);
}

.page-about .about-index {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-index-label {
  margin: 0;
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--mist);
}

.page-about .section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -.008em;
  margin: 0 0 18px;
  max-width: 22ch;
}

.page-about .about-text {
  font-size: .97rem;
  line-height: 1.85;
  color: rgba(243, 239, 228, .84);
  margin: 0 0 16px;
  max-width: 62ch;
}

.page-about .about-quote {
  margin-top: 26px;
  padding: 18px 22px;
  background: var(--paper);
  color: var(--ink);
  border-left: 4px solid var(--blue-stand);
  transform: rotate(-.5deg);
}

.page-about .about-quote p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  font-weight: 600;
}

.page-about .about-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-head-note {
  margin: 0;
  color: var(--mist);
  font-size: .9rem;
  line-height: 1.7;
  max-width: 52ch;
}

.page-about .about-head .section-index {
  display: inline-block;
  margin-bottom: 10px;
}

/* 五步流程 */
.page-about .about-flow {
  background: linear-gradient(180deg, var(--night), #0a1c2f 50%, var(--night));
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-steps li {
  padding: 18px 18px 20px;
  background: rgba(11, 46, 89, .34);
  border-top: 2px solid var(--teal);
}

.page-about .about-steps li:nth-child(2) {
  border-top-color: var(--blue-stand);
}

.page-about .about-steps li:nth-child(3) {
  border-top-color: var(--lime);
}

.page-about .about-steps li:nth-child(4) {
  border-top-color: var(--orange);
}

.page-about .about-steps li:nth-child(5) {
  border-top-color: var(--info);
}

.page-about .step-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--lime);
  margin-bottom: 10px;
}

.page-about .about-steps h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  letter-spacing: .02em;
}

.page-about .about-steps p {
  margin: 0;
  font-size: .84rem;
  line-height: 1.75;
  color: var(--mist);
}

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

.page-about .team-cards {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  position: relative;
  padding: 18px 20px 18px 24px;
  background: rgba(6, 19, 31, .7);
  border-left: 2px solid var(--blue-stand);
}

.page-about .team-card:nth-child(even) {
  border-left-color: var(--teal);
}

.page-about .team-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.65rem;
  line-height: 1;
  color: var(--info);
  margin: 0 0 6px;
}

.page-about .team-card h3 {
  font-size: 1rem;
  margin: 0 0 7px;
}

.page-about .team-card p {
  margin: 0;
  font-size: .84rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .team-figure {
  margin: 0;
  position: relative;
}

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

.page-about .team-figure figcaption {
  margin-top: 10px;
  font-size: .76rem;
  line-height: 1.6;
  color: var(--mist);
  border-left: 2px solid var(--lime);
  padding-left: 10px;
}

.page-about .about-city-band {
  margin-top: clamp(28px, 5vw, 48px);
  padding: clamp(20px, 4vw, 30px);
  background: var(--paper);
  color: var(--ink);
  transform: rotate(-.4deg);
}

.page-about .city-band-title {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  margin: 0 0 10px;
  letter-spacing: .01em;
}

.page-about .about-city-band p:last-child {
  margin: 0;
  font-size: .88rem;
  line-height: 1.8;
}

/* 年表 */
.page-about .about-history {
  background: linear-gradient(180deg, #07182a, var(--night));
}

.page-about .about-history-head {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  align-items: end;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .history-figure {
  margin: 0;
}

.page-about .history-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-bottom: 3px solid var(--lime);
}

.page-about .about-timeline {
  border-top: 1px solid var(--about-hair);
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .about-timeline .filter-bar {
  margin-bottom: clamp(16px, 3vw, 26px);
  flex-wrap: wrap;
  gap: 8px;
}

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

.page-about .timeline-item {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .timeline-item[hidden] {
  display: none;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.15rem;
  letter-spacing: .04em;
  color: var(--lime);
}

.page-about .tl-body h3 {
  font-size: 1rem;
  margin: 0 0 6px;
  letter-spacing: .01em;
}

.page-about .tl-body p {
  margin: 0;
  font-size: .86rem;
  line-height: 1.75;
  color: var(--mist);
  max-width: 60ch;
}

/* 规模 */
.page-about .about-scale {
  border-top: 1px solid var(--about-hair);
}

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

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 20px;
  background: var(--night);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 4vw, 2.15rem);
  line-height: 1;
  color: var(--lime);
  letter-spacing: -.01em;
}

.page-about .stat-unit {
  font-size: .52em;
  margin-left: 2px;
  color: var(--info);
}

.page-about .stat-label {
  font-size: .78rem;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-partners {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(20px, 4vw, 30px);
  background: rgba(11, 85, 99, .3);
  border-left: 3px solid var(--orange);
}

.page-about .partners-title {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--orange);
  margin: 0 0 14px;
}

.page-about .partners-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .partners-list li {
  font-size: .88rem;
  line-height: 1.6;
  color: rgba(243, 239, 228, .88);
  padding-left: 16px;
  border-left: 1px solid var(--line-strong);
}

.page-about .partners-list strong {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--info);
  margin-right: 6px;
}

.page-about .partners-note {
  margin: 0;
  font-size: .86rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 64ch;
}

/* 本地 */
.page-about .about-local {
  background: linear-gradient(180deg, var(--night), #0a1a2b 60%, #0B2E59 100%);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-local-grid {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  align-items: start;
}

.page-about .about-local-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 20px;
}

.page-about .local-figure {
  margin: 0;
}

.page-about .local-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-top: 3px solid var(--blue-stand);
}

.page-about .about-next {
  margin-top: clamp(28px, 5vw, 48px);
  padding: 22px clamp(18px, 4vw, 28px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  background: rgba(6, 19, 31, .62);
  border: 1px solid var(--line-strong);
}

.page-about .about-next p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: rgba(243, 239, 228, .88);
  max-width: 46ch;
}

.page-about .about-top {
  margin: 26px 0 0;
  text-align: right;
}

@media (min-width: 720px) {
  .page-about .timeline-item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }

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

  .page-about .partners-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-about .about-split {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-index {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    align-self: start;
    border-top: 2px solid var(--blue-stand);
    padding-top: 12px;
  }

  .page-about .about-index-label {
    writing-mode: horizontal-tb;
    font-size: .74rem;
    letter-spacing: .2em;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    border-top: 2px solid var(--line-strong);
  }

  .page-about .about-steps li {
    background: transparent;
    padding: 22px 18px 20px;
    border-top: 0;
    border-left: 1px solid var(--about-hair);
    position: relative;
  }

  .page-about .about-steps li::before {
    content: "";
    position: absolute;
    top: -5px;
    left: 18px;
    width: 8px;
    height: 8px;
    background: var(--lime);
    transform: rotate(45deg);
  }

  .page-about .about-steps li:first-child {
    border-left: 0;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

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

  .page-about .team-card:nth-child(3) {
    transform: translateY(10px);
  }

  .page-about .about-history-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
  }

  .page-about .about-local-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 1100px) {
  .page-about .about-stats {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-quote,
  .page-about .about-city-band,
  .page-about .team-card:nth-child(3) {
    transform: none;
  }
}