.page-about {
  background: var(--ink-deep);
  color: var(--white);
  overflow-x: clip;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 118px 0 60px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 82% at 84% 0%, rgba(43, 231, 224, 0.16), transparent 62%),
    radial-gradient(90% 60% at 0% 100%, rgba(255, 61, 139, 0.10), transparent 62%),
    linear-gradient(180deg, var(--navy) 0%, var(--ink-deep) 88%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(234, 242, 255, 0.045) 0 1px, transparent 1px 4px);
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  margin-top: 30px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.6vw, 56px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  max-width: 22ch;
}

.page-about .about-hero-lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .hero-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-cyan);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.page-about .hero-board-item {
  padding: 20px 18px;
  background: linear-gradient(160deg, rgba(19, 26, 69, 0.96), rgba(10, 16, 48, 0.96));
}

.page-about .hero-board-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(19px, 4.6vw, 26px);
  letter-spacing: 0.04em;
  color: var(--gold);
  line-height: 1.2;
}

.page-about .hero-board-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- Timeline ---------- */
.page-about .year-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 34px;
}

.page-about .year-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border: 1px solid var(--line-cyan);
  background: rgba(19, 26, 69, 0.7);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .year-chip:hover,
.page-about .year-chip:focus-visible {
  background: var(--cyan);
  color: var(--ink-deep);
}

.page-about .tl {
  position: relative;
  margin: 0;
  padding: 6px 0 6px 34px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--cyan) 58%, rgba(43, 231, 224, 0) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 34px;
  scroll-margin-top: 104px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-dot {
  position: absolute;
  left: -33px;
  top: 16px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 193, 48, 0.14), 0 0 18px rgba(255, 193, 48, 0.5);
}

.page-about .tl-card {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(19, 26, 69, 0.92), rgba(13, 19, 52, 0.92));
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.35);
}

.page-about .tl-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--gold), rgba(255, 193, 48, 0));
}

.page-about .tl-card-now {
  border-color: var(--line-cyan);
}

.page-about .tl-card-now::before {
  background: linear-gradient(180deg, var(--cyan), rgba(43, 231, 224, 0));
}

.page-about .tl-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .tl-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.45;
  color: var(--white);
}

.page-about .tl-text {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- Team ---------- */
.page-about .team-art {
  margin: 0 0 30px;
  border: 1px solid var(--line-cyan);
  background: var(--navy);
  overflow: hidden;
}

.page-about .team-art img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(1.05);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .filter-bar .filter-count {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

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

.page-about .team-card {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(19, 26, 69, 0.9), rgba(10, 16, 48, 0.9));
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .team-card:hover {
  border-color: var(--line-cyan);
  transform: translateY(-3px);
}

.page-about .team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--magenta);
}

.page-about .team-name {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .team-size {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .team-desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .filter-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 20px;
  border: 1px dashed var(--line-cyan);
  font-size: 15px;
  color: var(--muted);
}

/* ---------- Flow ---------- */
.page-about .flow-figure {
  margin: 0 0 26px;
  border: 1px solid var(--line-cyan);
  background: var(--navy);
  overflow: hidden;
}

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

.page-about .flow-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-cell {
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(19, 26, 69, 0.9), rgba(10, 16, 48, 0.9));
}

.page-about .flow-cell::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 3px;
  background: var(--cyan);
}

.page-about .flow-summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .flow-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .flow-details[open] .flow-summary::after {
  content: "−";
}

.page-about .flow-step {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .flow-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .flow-text {
  margin: 0;
  padding: 0 18px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- Principles ---------- */
.page-about .principle-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .paper-note {
  position: relative;
  padding: 24px 22px 26px;
  background: var(--paper);
  color: var(--paper-ink);
  border: 2px solid var(--paper-ink);
  box-shadow: 8px 8px 0 rgba(43, 231, 224, 0.18);
}

.page-about .note-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 10px;
  background: var(--paper-ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .paper-note h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  color: var(--paper-ink);
}

.page-about .paper-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(27, 20, 16, 0.82);
}

/* ---------- Partners ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .partner-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 4px;
}

.page-about .partner-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .partner-key {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--cyan);
  color: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.page-about .partner-name {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--white);
}

.page-about .partner-text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .partner-art {
  margin: 0 0 20px;
  border: 1px solid var(--line-cyan);
  background: var(--navy);
  overflow: hidden;
}

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

.page-about .honor-card {
  padding: 22px 20px 24px;
  border: 1px solid var(--line-cyan);
  background: linear-gradient(160deg, rgba(255, 193, 48, 0.08), rgba(19, 26, 69, 0.92));
}

.page-about .honor-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .honor-name {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.5;
  color: var(--white);
}

.page-about .honor-text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- Contact ---------- */
.page-about .contact-slab {
  position: relative;
  padding: 32px 22px 46px;
  border: 1px solid var(--line-cyan);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(43, 231, 224, 0.16), transparent 62%),
    linear-gradient(160deg, rgba(19, 26, 69, 0.96), rgba(10, 16, 48, 0.96));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .contact-lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
}

.page-about .contact-paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 26px;
}

.page-about .path-card {
  display: block;
  padding: 22px 20px 24px;
  border: 1px solid var(--line-cyan);
  background: rgba(10, 16, 48, 0.72);
  color: inherit;
  text-decoration: none;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .path-card:hover,
.page-about .path-card:focus-visible {
  border-color: var(--gold);
  background: rgba(19, 26, 69, 0.95);
  transform: translateY(-3px);
}

.page-about .path-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .path-title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 19px;
  color: var(--white);
}

.page-about .path-text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .path-go {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* ---------- Responsive ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 148px 0 76px;
  }

  .page-about .contact-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

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

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

  .page-about .contact-slab {
    padding: 40px 34px 56px;
  }
}

@media (min-width: 900px) {
  .page-about .flow-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    align-items: start;
  }

  .page-about .flow-cell:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -9px;
    top: 28px;
    width: 10px;
    height: 10px;
    border-top: 2px solid var(--cyan);
    border-right: 2px solid var(--cyan);
    transform: rotate(45deg);
    z-index: 2;
  }

  .page-about .tl {
    max-width: 860px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

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

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

  .page-about .partner-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero {
    padding: 168px 0 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .path-card,
  .page-about .year-chip {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .path-card:hover {
    transform: none;
  }
}