.page-about {
  --about-band-h: 72px;
  --about-line: rgba(242, 237, 228, 0.12);
  --about-gold-line: rgba(232, 185, 106, 0.34);
  padding-bottom: 72px;
  background: var(--ink);
  color: var(--cream);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding: 20px 0 4px;
}

.page-about .breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--stone);
}

.page-about .breadcrumbs-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(242, 237, 228, 0.28);
}

.page-about .breadcrumbs-list a {
  color: var(--stone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .breadcrumbs-list a:hover,
.page-about .breadcrumbs-list a:focus-visible {
  color: var(--gold-light);
  border-bottom-color: var(--gold-line);
}

.page-about .breadcrumbs-list [aria-current="page"] {
  color: var(--cream);
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 32px 0 56px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 16px 0 24px;
  background:
    radial-gradient(circle at 82% 22%, rgba(63, 224, 208, 0.08), transparent 42%),
    radial-gradient(circle at 12% 78%, rgba(232, 185, 106, 0.1), transparent 46%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: 32px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  padding: 28px 20px 32px;
  background: linear-gradient(160deg, rgba(18, 38, 63, 0.9), rgba(11, 26, 46, 0.72));
}

.page-about .about-hero-grid::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 88px;
  height: 3px;
  background: var(--gold);
}

.page-about .about-hero-copy .eyebrow {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  margin: 0 0 18px;
}

.page-about .about-hero-copy .display-title {
  margin: 0 0 22px;
  font-size: clamp(30px, 8vw, 58px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-hero-copy .lede {
  margin: 0 0 28px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--stone);
}

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

.page-about .about-hero-figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-about .media-frame-caption {
  display: block;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--stone);
  background: rgba(11, 26, 46, 0.82);
  border-top: 1px solid var(--about-line);
}

/* ---------- 暖金色带 ---------- */
.page-about .about-band {
  display: flex;
  align-items: center;
  justify-content: center;
  height: var(--about-band-h);
  margin: 0;
  background: linear-gradient(90deg, rgba(232, 185, 106, 0) 0%, rgba(232, 185, 106, 0.22) 22%, rgba(232, 185, 106, 0.22) 78%, rgba(232, 185, 106, 0) 100%);
  border-top: 1px solid rgba(232, 185, 106, 0.28);
  border-bottom: 1px solid rgba(232, 185, 106, 0.28);
}

.page-about .about-band-note {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.34em;
  color: var(--gold-light);
  white-space: nowrap;
}

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding: 48px 0;
}

.page-about .section-head {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "idx title"
    "note note";
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 16px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .section-index {
  grid-area: idx;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .section-title {
  grid-area: title;
  margin: 0;
  font-size: clamp(22px, 5.4vw, 34px);
  font-weight: 900;
  line-height: 1.3;
  color: var(--cream);
}

.page-about .section-note {
  grid-area: note;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--stone);
}

.page-about .lede {
  font-size: 16px;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin-body {
  display: grid;
  gap: 28px;
}

.page-about .about-origin-longform p {
  margin: 0 0 1.2em;
  font-size: 16px;
  line-height: 1.82;
  color: rgba(242, 237, 228, 0.86);
  max-width: 66ch;
}

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

.page-about .about-origin-aside {
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  background: var(--glass);
  padding: 20px 18px;
}

.page-about .about-fact-list {
  margin: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-fact {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--about-line);
}

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

.page-about .about-fact dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-about .about-fact dd {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--gold-light);
}

.page-about .about-fact dd.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---------- 02 分区动线 ---------- */
.page-about .about-zones-lede {
  margin: 0 0 26px;
  max-width: 64ch;
}

.page-about .about-zone-flow {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
  counter-reset: zone;
}

.page-about .about-zone {
  position: relative;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(18, 38, 63, 0.92), rgba(11, 26, 46, 0.78));
  padding: 22px 18px 20px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-zone:hover,
.page-about .about-zone:focus-within {
  transform: translateY(-4px);
  border-color: var(--about-gold-line);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.32);
}

.page-about .about-zone-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--gold);
  margin-bottom: 14px;
}

.page-about .about-zone-title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--cream);
}

.page-about .about-zone p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(242, 237, 228, 0.78);
}

.page-about .about-zone .tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
}

.page-about .tag-cyan { color: var(--cyan); }
.page-about .tag-moss { color: #7FA98C; }
.page-about .tag-clay { color: #D98A6B; }
.page-about .tag-coral { color: var(--coral); }

.page-about .about-zone-hint {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 22px;
  padding: 16px 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: var(--glass);
}

.page-about .about-zone-hint .status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(63, 224, 208, 0.14);
  animation: about-breathe 2.4s ease-in-out infinite;
}

.page-about .about-zone-hint p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 237, 228, 0.8);
}

.page-about .about-zone-hint a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid var(--about-gold-line);
}

.page-about .about-zone-hint a:hover,
.page-about .about-zone-hint a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

@keyframes about-breathe {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 4px rgba(63, 224, 208, 0.14); }
  50% { opacity: 0.62; box-shadow: 0 0 0 9px rgba(63, 224, 208, 0.05); }
}

/* ---------- 03 团队 ---------- */
.page-about .about-team-tabs {
  margin-bottom: 26px;
}

.page-about .tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.page-about .tab {
  appearance: none;
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  letter-spacing: 0.06em;
  padding: 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: transparent;
  color: var(--stone);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .tab:hover {
  color: var(--cream);
  border-color: var(--about-gold-line);
}

.page-about .tab[aria-selected="true"],
.page-about .tab.is-active {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
  font-weight: 700;
}

.page-about .tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-role-grid {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  border: 1px solid var(--about-line);
  border-top: 2px solid var(--gold);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(24, 51, 85, 0.86), rgba(11, 26, 46, 0.84));
  padding: 20px 16px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-3px);
  border-color: var(--about-gold-line);
}

.page-about .about-role-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 9vw, 44px);
  line-height: 1;
  font-weight: 700;
  color: var(--gold-light);
  margin-bottom: 12px;
}

.page-about .about-role-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  color: var(--cream);
}

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 237, 228, 0.76);
}

.page-about .about-venue-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-venue {
  padding: 18px 18px 16px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--glass);
}

.page-about .about-venue h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--cream);
}

.page-about .about-venue p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(242, 237, 228, 0.78);
}

.page-about .about-venue-foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--stone);
  padding-left: 14px;
  border-left: 2px solid var(--about-gold-line);
}

.page-about .about-team-figure {
  margin: 28px 0 0;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

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

/* ---------- 04 时间轴 ---------- */
.page-about .about-milestone-figure {
  margin: 0 0 30px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-milestone-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 2;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 5px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(63, 224, 208, 0.6) 55%, rgba(232, 185, 106, 0.08) 100%);
}

.page-about .about-timeline .timeline-item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 0 0 26px;
}

.page-about .about-timeline .timeline-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline .timeline-item:hover::before,
.page-about .about-timeline .timeline-item:focus-visible::before,
.page-about .about-timeline .timeline-item:focus-within::before {
  transform: scale(1.28);
  border-color: var(--cyan);
  box-shadow: 0 0 0 6px rgba(63, 224, 208, 0.14);
}

.page-about .about-timeline .timeline-item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
  border-radius: var(--radius);
}

.page-about .about-timeline .timeline-date {
  font-family: var(--font-mono);
  font-size: clamp(20px, 5.4vw, 26px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
  line-height: 1.1;
}

.page-about .about-timeline .timeline-body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
  color: var(--cream);
}

.page-about .about-timeline .timeline-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(242, 237, 228, 0.76);
  max-width: 62ch;
}

.page-about .about-timeline .timeline-item--aside::before {
  border-color: var(--coral);
  width: 9px;
  height: 9px;
}

.page-about .about-timeline .timeline-item--aside .timeline-date {
  color: var(--coral);
}

/* ---------- 05 接待标准 ---------- */
.page-about .about-standard-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-standard {
  position: relative;
  padding: 22px 18px 20px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(18, 38, 63, 0.92), rgba(11, 26, 46, 0.8));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-standard:hover {
  transform: translateY(-4px);
  border-color: var(--about-gold-line);
}

.page-about .about-standard-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .about-standard .card-title {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  color: var(--cream);
}

.page-about .about-standard .card-body {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(242, 237, 228, 0.78);
}

.page-about .about-standards-foot {
  display: grid;
  gap: 22px;
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-standards-note p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--stone);
  max-width: 60ch;
}

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

.page-about .about-standards-cta p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 237, 228, 0.82);
}

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

/* ---------- 收尾 ---------- */
.page-about .divider {
  height: 1px;
  margin: 8px 0 0;
  background: linear-gradient(90deg, rgba(232, 185, 106, 0) 0%, rgba(232, 185, 106, 0.5) 50%, rgba(232, 185, 106, 0) 100%);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about {
    --about-band-h: 88px;
  }

  .page-about .section {
    padding: 60px 0;
  }

  .page-about .section-head {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "idx title note";
    gap: 0 18px;
    align-items: center;
  }

  .page-about .section-note {
    text-align: right;
  }

  .page-about .about-hero-grid {
    padding: 40px 36px 44px;
  }

  .page-about .about-hero-grid::after {
    left: 36px;
    width: 120px;
  }

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

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

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

  .page-about .about-zone:nth-child(odd) {
    transform: translateX(-12px);
  }

  .page-about .about-zone:nth-child(even) {
    transform: translateX(12px);
  }

  .page-about .about-zone:nth-child(odd):hover,
  .page-about .about-zone:nth-child(even):hover {
    transform: translate(0, -4px);
  }

  .page-about .about-standards-foot {
    grid-template-columns: 1.5fr 1fr;
    gap: 32px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 44px 0 72px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
    gap: 44px;
    padding: 48px 44px 52px;
  }

  .page-about .about-hero-grid::after {
    left: 44px;
    width: 148px;
  }

  .page-about .about-hero-copy .lede {
    font-size: 17px;
  }

  .page-about .about-origin-body {
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 44px;
    align-items: start;
  }

  .page-about .about-origin-aside {
    position: sticky;
    top: 96px;
    padding: 24px 22px;
  }

  .page-about .about-zone-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-zone:nth-child(odd),
  .page-about .about-zone:nth-child(even) {
    transform: none;
  }

  .page-about .about-zone:nth-child(odd) {
    margin-top: -18px;
  }

  .page-about .about-zone:nth-child(odd):hover {
    transform: translateY(-4px);
  }

  .page-about .about-role-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-teap-team {
    display: block;
  }

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

  .page-about .about-standard-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline {
    padding-left: 34px;
  }

  .page-about .about-timeline::before {
    left: 6px;
    width: 2px;
  }

  .page-about .about-timeline .timeline-item::before {
    left: -34px;
    width: 14px;
    height: 14px;
  }

  .page-about .about-timeline .timeline-item--aside::before {
    width: 10px;
    height: 10px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-zone-flow {
    gap: 20px;
  }

  .page-about .about-timeline .timeline-body p {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}
</main>

.page-about {
  --gold-line: currentColor;
}