.page-about {
  --about-rule: rgba(26, 31, 28, 0.15);
  --about-soft: #54655C;
  --about-dim: #7C8A80;
  --about-body: #26302A;
  --about-cut: 14px;
  background: var(--paper);
  color: var(--paper-ink);
  font-family: var(--font-sans);
  padding-block: clamp(24px, 4vw, 52px) clamp(48px, 7vw, 96px);
  overflow-x: clip;
}

.page-about .about-shell {
  width: 100%;
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 48px);
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 3.5vw, 34px);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--about-dim);
}

.page-about .about-crumbs a {
  color: var(--about-body);
  text-decoration: none;
  border-bottom: 1px solid rgba(26, 31, 28, 0.28);
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-crumbs a:hover {
  color: var(--ink);
  border-bottom-color: var(--amber);
}

.page-about .about-crumbs .crumb-sep {
  color: rgba(26, 31, 28, 0.35);
}

.page-about .about-hero {
  padding-bottom: clamp(24px, 3.5vw, 40px);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: #3E4F46;
}

.page-about .about-eyebrow::before {
  content: "";
  width: 9px;
  height: 9px;
  background: var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}

.page-about .about-h1 {
  margin: 16px 0 0;
  max-width: 20ch;
  font-size: clamp(2rem, 6.4vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-hl {
  position: relative;
  display: inline-block;
  padding-inline: 0.08em;
}

.page-about .about-hl::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.22em;
  background: linear-gradient(90deg, var(--amber), rgba(255, 185, 46, 0.25));
  z-index: -1;
}

.page-about .about-lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 60ch;
  font-size: clamp(0.98rem, 1.3vw, 1.1rem);
  line-height: 1.92;
  color: #2E3A33;
}

.page-about .about-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 0;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: #41524A;
}

.page-about .about-meta li + li::before {
  content: "/";
  margin: 0 12px;
  color: rgba(26, 31, 28, 0.3);
}

.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(26px, 4vw, 46px);
}

.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--about-dim);
}

.page-about .about-toc {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc li {
  flex: 0 0 auto;
}

.page-about .about-toc-link {
  display: block;
  padding: 7px 10px;
  font-size: 0.82rem;
  line-height: 1.3;
  white-space: nowrap;
  color: var(--about-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-toc-link:hover {
  color: var(--ink);
  border-bottom-color: var(--amber);
}

.page-about .about-toc-link[aria-current="true"] {
  color: var(--ink);
  border-bottom-color: var(--amber);
  background: rgba(255, 185, 46, 0.16);
}

.page-about .about-article {
  min-width: 0;
}

.page-about .about-chapter {
  padding-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-chapter:first-child {
  padding-top: 0;
  border-top: 0;
}

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

.page-about .about-num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  line-height: 0.9;
  font-weight: 700;
  color: rgba(26, 31, 28, 0.18);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-about .about-num {
    color: transparent;
    -webkit-text-stroke: 1.4px rgba(26, 31, 28, 0.36);
  }
}

.page-about .about-chapter-title {
  margin: 0;
  font-size: clamp(1.28rem, 2.8vw, 1.95rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-chapter-grid {
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-text {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .about-text p {
  margin: 0 0 1em;
  max-width: 60ch;
  font-size: clamp(0.94rem, 1.05vw, 1.01rem);
  line-height: 1.95;
  color: var(--about-body);
}

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

.page-about .about-text a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
  padding-bottom: 1px;
  transition: background 0.18s var(--ease);
}

.page-about .about-text a:hover {
  background: rgba(255, 185, 46, 0.24);
}

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

.page-about .about-figure-inner {
  background: var(--panel);
  border: 1px solid rgba(26, 31, 28, 0.2);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  overflow: hidden;
}

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

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.69rem;
  line-height: 1.65;
  letter-spacing: 0.03em;
  color: var(--about-dim);
}

.page-about .about-wide-figure {
  margin: clamp(22px, 3.2vw, 34px) 0 0;
}

.page-about .about-note {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 14px 22px;
  margin-top: clamp(20px, 3vw, 30px);
  padding: 16px clamp(14px, 2.6vw, 24px);
  background: var(--ink);
  color: var(--haze);
  border-left: 3px solid var(--mint);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

.page-about .about-note-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .about-note-value {
  font-family: var(--font-num);
  font-size: clamp(1.4rem, 2.8vw, 1.95rem);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--amber);
}

.page-about .about-note-item:nth-child(even) .about-note-value {
  color: var(--mint);
}

.page-about .about-note-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-timeline {
  margin-top: clamp(24px, 3.4vw, 34px);
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .about-timeline-inner {
  position: relative;
  min-width: 640px;
  padding-top: 50px;
}

.page-about .about-tl-track {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 50px;
  display: block;
}

.page-about .about-tl-nodes {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl-node {
  position: relative;
  text-align: center;
}

.page-about .about-tl-node::before {
  content: "";
  display: block;
  width: 7px;
  height: 7px;
  margin: 0 auto 8px;
  background: var(--amber);
  transform: rotate(45deg);
}

.page-about .about-tl-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 8px 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--about-soft);
  text-decoration: none;
  border-top: 1px solid transparent;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-tl-link:hover {
  color: var(--ink);
  background: rgba(14, 33, 27, 0.07);
  border-top-color: var(--amber);
}

.page-about .about-tl-season {
  font-family: var(--font-num);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.page-about .about-tl-tag {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  padding: 1px 5px;
  background: var(--amber);
  color: var(--ink-deep);
}

.page-about .about-cross {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: clamp(22px, 3vw, 34px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-cross-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  font-weight: 400;
  color: var(--about-dim);
}

.page-about .about-cross-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-about .about-cross-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 16px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--line);
  color: inherit;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-cross-card:hover,
.page-about .about-cross-card:focus-visible {
  background: #FFFFFF;
  border-left-color: var(--amber);
  transform: translateY(-2px);
}

.page-about .about-cross-card-title {
  font-size: 0.94rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-cross-card-desc {
  font-size: 0.79rem;
  line-height: 1.7;
  color: var(--about-soft);
}

@media (min-width: 640px) {
  .page-about .about-cross-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 760px) {
  .page-about .about-chapter-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(20px, 3vw, 34px);
    align-items: start;
  }

  .page-about .about-chapter-grid .about-text {
    margin-top: 0;
  }

  .page-about .about-figure {
    margin-top: 4px;
  }
}

@media (min-width: 900px) {
  .page-about .about-body {
    grid-template-columns: 184px minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 60px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    padding-left: 14px;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .about-rail-title {
    margin-bottom: 12px;
  }

  .page-about .about-toc {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc-link {
    padding: 8px 12px;
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

  .page-about .about-toc-link:hover {
    border-bottom-color: transparent;
    border-left-color: var(--amber);
  }

  .page-about .about-toc-link[aria-current="true"] {
    border-bottom-color: transparent;
    border-left-color: var(--amber);
  }
}

@media (min-width: 1024px) {
  .page-about .about-cross-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-text p {
    max-width: 56ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc-link,
  .page-about .about-tl-link,
  .page-about .about-cross-card,
  .page-about .about-text a {
    transition: none;
  }

  .page-about .about-cross-card:hover,
  .page-about .about-cross-card:focus-visible {
    transform: none;
  }
}
<<<END>>>