.page-about {
  --about-toc-width: 224px;
  position: relative;
  display: block;
  background:
    var(--grid-pattern),
    linear-gradient(180deg, var(--navy-900) 0%, var(--navy-800) 26%, var(--navy-900) 58%, var(--navy-800) 100%);
  color: var(--silver-300);
  padding: 40px 20px 96px;
  min-height: 60vh;
  font-family: var(--font-sans);
}

.page-about__frame {
  max-width: 1280px;
  margin: 0 auto;
  position: relative;
}

.page-about .breadcrumb {
  margin: 0 0 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--silver-300);
}

.page-about .breadcrumb a {
  color: var(--orange-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 108, 44, 0.35);
  transition: color 0.2s, border-color 0.2s;
}

.page-about .breadcrumb a:hover {
  color: var(--orange-500);
  border-color: var(--orange-500);
}

.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: rgba(192, 199, 207, 0.5);
}

.page-about__intro {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 24px 0 48px;
  scroll-margin-top: 110px;
}

.page-about__intro-vertical {
  position: absolute;
  top: 0;
  right: 0;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.42em;
  color: rgba(192, 199, 207, 0.42);
  text-transform: uppercase;
  pointer-events: none;
}

.page-about__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange-500);
  text-transform: uppercase;
}

.page-about__intro h1 {
  margin: 0 0 22px;
  font-size: 34px;
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--silver-100);
  border-left: 6px solid var(--orange-500);
  padding-left: 18px;
}

.page-about__intro-copy p:not(.page-about__kicker):not(.page-about__lead):not(.page-about__intro-stats) {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver-300);
}

.page-about__intro .page-about__lead {
  margin: 0 0 18px;
  font-size: 18px;
  line-height: 1.75;
  color: var(--silver-200);
  font-weight: 600;
}

.page-about__intro-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
}

.page-about__intro-stats span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--silver-200);
  border: 2px solid rgba(192, 199, 207, 0.22);
  border-radius: var(--radius-pill);
  background: var(--navy-800);
  box-shadow: var(--shadow-1);
}

.page-about__intro-stats strong {
  font-size: 18px;
  font-weight: 700;
  color: var(--orange-400);
}

.page-about__intro-side {
  position: relative;
}

.page-about .figure__frame {
  border-radius: var(--radius-md);
  border: 2px solid rgba(192, 199, 207, 0.18);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  background: var(--navy-800);
}

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

.page-about .figure__caption {
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--silver-300);
}

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

.page-about__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-top: 12px;
}

.page-about__toc {
  min-width: 0;
}

.page-about__toc-inner {
  padding: 20px;
  background: var(--navy-800);
  border: 2px solid rgba(192, 199, 207, 0.16);
  border-left: 5px solid var(--orange-500);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
}

.page-about__toc-label {
  width: 100%;
  margin: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange-400);
}

.page-about__toc nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about__toc nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 13px;
  font-size: 13px;
  font-weight: 600;
  color: var(--silver-300);
  text-decoration: none;
  border: 1px solid rgba(192, 199, 207, 0.2);
  border-radius: var(--radius-pill);
  background: var(--navy-800);
  transition: background 0.25s, color 0.25s, border-color 0.25s, transform 0.25s;
}

.page-about__toc nav a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange-400);
}

.page-about__toc nav a:hover,
.page-about__toc nav a:focus-visible {
  background: var(--navy-700);
  color: var(--silver-100);
  border-color: var(--orange-500);
  transform: translateX(3px);
}

.page-about__toc-live {
  display: none;
  margin: 16px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed rgba(192, 199, 207, 0.22);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--silver-300);
}

.page-about__toc-live span {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--orange-500);
  vertical-align: middle;
  animation: honorBlink 2.2s ease-in-out infinite;
}

.page-about__backtop {
  display: inline-block;
  margin-left: auto;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange-400);
  text-decoration: none;
  border: 1px solid rgba(255, 108, 44, 0.45);
  border-radius: var(--radius-pill);
  transition: background 0.25s, color 0.25s;
}

.page-about__backtop:hover {
  background: var(--orange-500);
  color: var(--navy-900);
}

.page-about__content {
  min-width: 0;
}

.page-about__section {
  position: relative;
  margin-bottom: 88px;
  scroll-margin-top: 132px;
}

.page-about__section-head {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 22px;
}

.page-about__section-num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  min-height: 46px;
  padding: 0 10px;
  background: linear-gradient(135deg, var(--orange-500), var(--orange-400));
  color: var(--navy-900);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  clip-path: polygon(9px 0, 100% 0, calc(100% - 9px) 100%, 0 100%);
  box-shadow: var(--shadow-orange);
}

.page-about__section-tag {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange-400);
}

.page-about__section-head h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--silver-100);
}

.page-about__section-vertical {
  position: absolute;
  right: 0;
  top: 6px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: rgba(192, 199, 207, 0.34);
  pointer-events: none;
}

.page-about__section-lead {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--silver-200);
  font-weight: 600;
}

.page-about__section > p:not(.page-about__section-lead):not(.page-about__subnote) {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver-300);
  max-width: 720px;
}

.page-about__subnote {
  margin: 18px 0 0;
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver-300);
  background: rgba(255, 108, 44, 0.07);
  border: 1px solid rgba(255, 108, 44, 0.18);
  border-radius: var(--radius-sm);
}

.page-about__subnote a {
  color: var(--orange-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about__section--metrics::before {
  content: "3,000+ RECORDS / 18 TEAMS / 46 ROUNDS / 20–50 DAILY";
  display: block;
  width: fit-content;
  max-width: 100%;
  margin-bottom: 24px;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(192, 199, 207, 0.42);
  border: 1px solid rgba(192, 199, 207, 0.16);
  border-radius: var(--radius-pill);
  background: rgba(11, 31, 58, 0.5);
}

.page-about__section--metrics::after {
  content: "";
  display: block;
  height: 3px;
  margin-top: 32px;
  background: linear-gradient(90deg, transparent, var(--orange-500), transparent);
  background-size: 60% 100%;
  background-repeat: no-repeat;
  animation: honorSweep 2.6s ease-in-out infinite;
}

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

.page-about__timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 17px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange-500) 0%, var(--navy-700) 82%);
}

.page-about__timeline li {
  position: relative;
  padding: 0 0 30px 52px;
}

.page-about__timeline li:last-child {
  padding-bottom: 0;
}

.page-about__timeline li::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  z-index: 1;
  width: 16px;
  height: 16px;
  border: 4px solid var(--orange-500);
  border-radius: 50%;
  background: var(--navy-900);
  box-shadow: 0 0 0 4px rgba(255, 108, 44, 0.13);
}

.page-about__year {
  display: inline-block;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--orange-400);
  border: 1px solid rgba(255, 108, 44, 0.35);
  border-radius: var(--radius-pill);
  background: rgba(255, 108, 44, 0.09);
}

.page-about__timeline h3 {
  margin: 12px 0 6px;
  font-size: 18px;
  line-height: 1.3;
  color: var(--silver-200);
  font-weight: 700;
}

.page-about__timeline p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver-300);
}

.page-about__quote {
  margin: 30px 0 0;
  padding: 22px 26px;
  border-left: 5px solid var(--orange-500);
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(255, 108, 44, 0.13), transparent 64%);
}

.page-about__quote p {
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: var(--silver-200);
  font-weight: 600;
}

.page-about__flow {
  list-style: none;
  margin: 30px 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about__flow li {
  position: relative;
  padding: 22px;
  background: var(--navy-800);
  border: 2px solid rgba(192, 199, 207, 0.14);
  border-top: 5px solid var(--orange-500);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-about__flow-num {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--orange-400);
}

.page-about__flow h3 {
  margin: 0 0 6px;
  font-size: 19px;
  color: var(--silver-200);
  font-weight: 700;
}

.page-about__flow p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--silver-300);
}

.page-about__workflow-figure {
  margin: 28px 0 0;
}

.page-about__metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 28px 0 24px;
}

.page-about__metrics > div {
  position: relative;
  overflow: hidden;
  padding: 22px;
  background: var(--navy-800);
  border: 2px solid rgba(192, 199, 207, 0.16);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-about__metrics > div::after {
  content: "VIA LEYU";
  position: absolute;
  right: -14px;
  top: -6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(255, 108, 44, 0.12);
  transform: rotate(32deg);
  pointer-events: none;
}

.page-about__metrics dt {
  margin-bottom: 4px;
  color: var(--orange-400);
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.1;
}

.page-about__metrics dd {
  margin: 0;
}

.page-about__metrics dd:nth-of-type(1) {
  margin-bottom: 6px;
  color: var(--silver-100);
  font-size: 15px;
  font-weight: 600;
}

.page-about__metrics dd:nth-of-type(2) {
  color: var(--silver-300);
  font-size: 13px;
  line-height: 1.65;
}

.page-about__crew-figure {
  margin: 28px 0 0;
}

.page-about__crew {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 28px 0 8px;
}

.page-about__crew details {
  background: var(--navy-800);
  border: 2px solid rgba(192, 199, 207, 0.14);
  border-left: 5px solid var(--orange-500);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-about__crew summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 20px;
  cursor: pointer;
  color: var(--silver-200);
  font-size: 16px;
  font-weight: 700;
  transition: background 0.25s;
}

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

.page-about__crew summary:hover,
.page-about__crew summary:focus-visible {
  background: var(--navy-700);
}

.page-about__crew-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--navy-900);
  background: var(--orange-500);
  clip-path: polygon(7px 0, 100% 0, calc(100% - 7px) 100%, 0 100%);
}

.page-about__crew summary small {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--orange-400);
}

.page-about__crew details p {
  margin: 0;
  padding: 2px 20px 20px 68px;
  color: var(--silver-300);
  font-size: 14px;
  line-height: 1.7;
}

.page-about__trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 28px 0 24px;
}

.page-about__trust-card {
  padding: 22px;
  background: var(--navy-800);
  border: 2px solid rgba(192, 199, 207, 0.16);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-about__trust-card h3 {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 108, 44, 0.3);
  color: var(--silver-200);
  font-size: 17px;
}

.page-about__trust-card p {
  margin: 0 0 10px;
  color: var(--silver-300);
  font-size: 14px;
  line-height: 1.7;
}

.page-about__trust-card p:last-child {
  margin-bottom: 0;
}

.page-about__trust-card a {
  color: var(--orange-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about__footnote {
  font-size: 12px;
  color: rgba(192, 199, 207, 0.68);
}

.page-about__outro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: 26px;
  border: 2px dashed rgba(255, 108, 44, 0.3);
  border-radius: var(--radius-md);
  background: rgba(255, 108, 44, 0.05);
}

.page-about__outro-label {
  width: 100%;
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange-400);
}

@media (min-width: 640px) {
  .page-about__metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .page-about__crew {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (min-width: 768px) {
  .page-about__intro h1 {
    font-size: 44px;
  }

  .page-about__section-head h2 {
    font-size: 34px;
  }

  .page-about__flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  .page-about__flow li:not(:last-child)::after {
    content: "→";
    position: absolute;
    right: -16px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 2;
    font-family: var(--font-mono);
    font-size: 18px;
    color: var(--orange-400);
  }
}

@media (min-width: 900px) {
  .page-about__intro {
    grid-template-columns: 58% 42%;
    gap: 40px;
    align-items: center;
    padding: 32px 0 56px;
  }

  .page-about__intro-figure::before {
    content: "";
    position: absolute;
    inset: -14px;
    z-index: 0;
    border: 1px dashed rgba(255, 108, 44, 0.34);
    border-radius: var(--radius-md);
    pointer-events: none;
  }

  .page-about__intro-figure .figure__frame {
    position: relative;
    z-index: 1;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding: 56px 32px 120px;
  }

  .page-about__layout {
    grid-template-columns: var(--about-toc-width) minmax(0, 1fr);
    gap: 56px;
    margin-top: 20px;
  }

  .page-about__toc {
    position: sticky;
    top: 140px;
    height: fit-content;
    z-index: 4;
  }

  .page-about__toc-inner {
    display: block;
    padding: 22px;
  }

  .page-about__toc nav {
    flex-direction: column;
    gap: 4px;
  }

  .page-about__toc nav a {
    display: flex;
    padding: 9px 12px;
    border: 0;
    border-radius: var(--radius-sm);
    background: transparent;
    font-size: 14px;
  }

  .page-about__toc nav a span {
    display: inline;
  }

  .page-about__toc-live {
    display: block;
  }

  .page-about__backtop {
    margin-left: 0;
    margin-top: 14px;
  }

  .page-about__section:nth-child(2) {
    margin-left: 44px;
  }

  .page-about__section:nth-child(3) {
    margin-right: 44px;
  }

  .page-about__section:nth-child(4) {
    margin-left: 44px;
  }

  .page-about__section:nth-child(5) {
    margin-right: 44px;
  }
}

@keyframes honorBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

@keyframes honorSweep {
  0% { background-position: -60% 0; }
  100% { background-position: 160% 0; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about__section--metrics::after,
  .page-about__toc-live span {
    animation: none;
  }

  .page-about__section--metrics::after {
    background: linear-gradient(90deg, transparent, var(--orange-500), transparent);
  }
}