.page-about {
  --time-pad: clamp(2.6rem, 8vw, 3.4rem);
  --about-card-bg: #fffdf5;
  background: var(--deep-blue);
  color: var(--text-light);
  overflow-x: clip;
}

.page-about .about-inner {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.5rem);
}

.page-about a:focus-visible {
  outline: 3px solid var(--focus-blue);
  outline-offset: 3px;
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  padding: 1.6rem 0 2.4rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--muted-gray);
}

.page-about .about-crumbs a {
  color: var(--gold);
  text-decoration: none;
}

.page-about .about-crumbs a:hover {
  text-decoration: underline;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-bottom: clamp(3rem, 7vw, 5rem);
  background:
    radial-gradient(110% 80% at 85% -10%, rgba(226,177,60,.22), transparent 52%),
    linear-gradient(135deg, #10101f 0%, var(--deep-blue) 68%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 0 55%, rgba(226,177,60,.08) 55% 100%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2.2rem;
}

.page-about .about-kicker {
  margin: 0 0 .6rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-hero h1 {
  position: relative;
  margin: 0 0 1.2rem;
  padding-bottom: .45em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 5vw, 3.8rem);
  line-height: 1.1;
  letter-spacing: -.01em;
}

.page-about .about-hero h1::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 84px;
  height: 5px;
  background: var(--gold);
}

.page-about .about-hero-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-light);
  opacity: .92;
}

.page-about .about-hero-note {
  margin: 1.4rem 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--border-dark);
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--muted-gray);
  max-width: 58ch;
}

.page-about .about-hero-index {
  display: grid;
  gap: .55rem;
  align-content: start;
  padding: .4rem 0 .2rem 1.25rem;
  border-left: 3px solid var(--gold);
}

.page-about .about-hero-index::before {
  content: "本页目录";
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: .25rem;
}

.page-about .about-hero-index a {
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--text-light);
  text-decoration: none;
  padding: .35rem 0;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s, padding-left .2s;
}

.page-about .about-hero-index a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
  padding-left: .4rem;
}

.page-about .about-milestones {
  background: var(--warm-paper);
  color: var(--ink-black);
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.page-about .about-section-head {
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
  margin-bottom: 2rem;
}

.page-about .about-section-num {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  margin: .2rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--ink-black);
  background: var(--gold);
  border: 2px solid var(--ink-black);
  transform: rotate(-4deg);
}

.page-about .about-section-head h2 {
  margin: 0 0 .5rem;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.6vw, 2.7rem);
  font-weight: 800;
  line-height: 1.15;
}

.page-about .about-section-desc {
  margin: 0;
  max-width: 58ch;
  font-size: .98rem;
  line-height: 1.7;
  opacity: .8;
}

.page-about .about-timeline {
  position: relative;
  margin: 2.8rem 0 0;
  padding-left: var(--time-pad);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: calc(var(--time-pad) / 2 - 1.5px);
  width: 3px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(226,177,60,.12) 100%);
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.page-about .about-timeline-item:last-child {
  margin-bottom: 0;
}

.page-about .about-node {
  position: absolute;
  top: .5rem;
  left: calc(-1 * var(--time-pad) / 2 - 11px);
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  background: var(--gold);
  border: 2px solid var(--ink-black);
  transform: rotate(45deg);
  box-shadow: 0 4px 0 rgba(15,15,26,.25);
}

.page-about .about-node span {
  transform: rotate(-45deg);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .7rem;
  line-height: 1;
  color: var(--ink-black);
}

.page-about .about-node-card {
  background: var(--about-card-bg);
  border: 2px solid var(--ink-black);
  padding: 1.15rem 1.25rem;
  box-shadow: 6px 6px 0 rgba(15,15,26,.14);
  transition: transform .25s, box-shadow .25s;
}

.page-about .about-node-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 rgba(226,177,60,.45);
}

.page-about .about-node-stage {
  margin: 0 0 .2rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--crimson);
}

.page-about .about-node-card h3 {
  margin: 0 0 .4rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1.25;
}

.page-about .about-node-card p:last-child {
  margin: 0;
  font-size: .9rem;
  line-height: 1.65;
  color: rgba(15,15,26,.82);
}

.page-about .about-milestone-figure {
  margin: 2.6rem 0 0;
  border: 3px solid var(--ink-black);
  background: var(--deep-blue);
  box-shadow: 12px 12px 0 rgba(226,177,60,.28);
}

.page-about .about-milestone-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-milestone-figure figcaption {
  padding: .8rem 1rem;
  border-top: 3px solid var(--ink-black);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-light);
}

.page-about .about-data {
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(226,177,60,.18), transparent 50%),
    linear-gradient(150deg, #12121f 0%, var(--deep-blue) 80%);
  color: var(--text-light);
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2.4rem;
}

.page-about .about-data-cell {
  padding: 1.5rem 1.3rem;
  background: rgba(15,15,26,.36);
  border: 2px solid var(--border-dark);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.page-about .about-data-cell:hover {
  transform: translateY(-5px);
  border-color: var(--gold);
  box-shadow: 0 14px 28px rgba(0,0,0,.28);
}

.page-about .about-data-label {
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-data-value {
  margin: .6rem 0 .5rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 6vw, 3.1rem);
  line-height: 1;
  color: var(--text-light);
}

.page-about .about-big {
  color: var(--gold);
}

.page-about .about-unit {
  margin-left: .2rem;
  font-size: .45em;
  color: var(--text-light);
}

.page-about .about-data-extra {
  margin: 0;
  font-size: .82rem;
  line-height: 1.5;
  color: var(--muted-gray);
}

.page-about .about-region {
  background: var(--warm-paper);
  color: var(--ink-black);
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.page-about .about-region-grid {
  display: grid;
  gap: 2.2rem;
  align-items: center;
}

.page-about .about-region-figure {
  margin: 0;
  border: 3px solid var(--ink-black);
  box-shadow: 12px 12px 0 rgba(226,177,60,.38);
}

.page-about .about-region-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-region-figure figcaption {
  padding: .75rem 1rem;
  background: var(--ink-black);
  color: var(--text-light);
  font-family: var(--font-mono);
  font-size: .74rem;
}

.page-about .about-region-copy p {
  margin: 0 0 1.1rem;
  font-size: .97rem;
  line-height: 1.8;
  color: rgba(15,15,26,.84);
}

.page-about .about-region-copy p:last-of-type {
  margin-bottom: 1.6rem;
}

.page-about .about-region-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .9rem 1.5rem;
  border: 2px solid var(--ink-black);
  background: var(--gold);
  color: var(--ink-black);
  font-weight: 600;
  font-size: .92rem;
  text-decoration: none;
  line-height: 1.2;
  box-shadow: 6px 6px 0 rgba(15,15,26,.18);
  transition: transform .22s, box-shadow .22s, background .22s;
}

.page-about .about-region-btn:hover {
  transform: translate(-3px, -3px);
  box-shadow: 9px 9px 0 rgba(15,15,26,.22);
  background: #f0bd40;
}

.page-about .about-team {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(226,177,60,.1) 0%, transparent 40%),
    var(--deep-blue);
  color: var(--text-light);
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.page-about .about-team-grid {
  display: grid;
  gap: 2.4rem;
  align-items: start;
  margin-top: 2.2rem;
}

.page-about .about-team-roles {
  display: grid;
  gap: 1rem;
}

.page-about .about-role {
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--border-dark);
  border-left: 5px solid var(--gold);
  background: rgba(15,15,26,.34);
  transition: transform .25s, border-color .2s, background .25s;
}

.page-about .about-role:hover {
  transform: translateX(6px);
  border-left-color: var(--crimson);
  background: rgba(15,15,26,.52);
}

.page-about .about-role-code {
  display: inline-block;
  margin-bottom: .45rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-about .about-role h3 {
  margin: 0 0 .35rem;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 800;
}

.page-about .about-role p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.65;
  color: rgba(240,230,210,.84);
}

.page-about .about-team-figure {
  margin: 0;
  border: 3px solid var(--ink-black);
  box-shadow: 14px 14px 0 rgba(0,0,0,.36);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-team-figure figcaption {
  padding: .75rem 1rem;
  background: var(--ink-black);
  color: var(--text-light);
  font-family: var(--font-mono);
  font-size: .74rem;
}

.page-about .about-more {
  background:
    linear-gradient(120deg, rgba(26,26,46,.14) 0%, transparent 38%),
    var(--gold);
  color: var(--ink-black);
  padding-block: clamp(3rem, 7vw, 5rem);
  text-align: center;
}

.page-about .about-more h2 {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 900;
}

.page-about .about-more > .about-inner > p {
  margin: 0 auto 2rem;
  max-width: 44ch;
  font-size: .96rem;
  line-height: 1.7;
  color: rgba(15,15,26,.78);
}

.page-about .about-more-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.page-about .about-more-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .85rem 1.6rem;
  border: 2px solid var(--ink-black);
  background: var(--ink-black);
  color: var(--text-light);
  font-weight: 600;
  font-size: .92rem;
  text-decoration: none;
  line-height: 1.2;
  box-shadow: 5px 5px 0 rgba(15,15,26,.22);
  transition: transform .22s, box-shadow .22s, background .22s, color .22s;
}

.page-about .about-more-btn:hover {
  transform: translate(-3px, -3px);
  box-shadow: 8px 8px 0 rgba(15,15,26,.26);
  background: var(--deep-blue);
  color: var(--gold);
}

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

  .page-about .about-team-roles {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 4rem;
    align-items: end;
  }

  .page-about .about-hero-index {
    margin-bottom: .6rem;
  }

  .page-about .about-data-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-region-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 3.5rem;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 3.5rem;
  }

  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline-item {
    width: calc(50% - 2.5rem);
    margin-left: 0;
  }

  .page-about .about-timeline-item:nth-child(even) {
    margin-left: calc(50% + 2.5rem);
  }

  .page-about .about-node {
    top: .6rem;
    left: auto;
    right: calc(-2.5rem - 11px);
  }

  .page-about .about-timeline-item:nth-child(even) .about-node {
    right: auto;
    left: calc(-2.5rem - 11px);
  }
}