.page-about {
  --about-line: rgba(42, 46, 53, 0.16);
  --about-shadow: 5px 5px 0 rgba(242, 101, 34, 0.42);
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-hero {
  padding: clamp(16px, 3vw, 30px) 0 clamp(28px, 5vw, 56px);
  border-bottom: 1px solid var(--about-line);
  background:
    linear-gradient(114deg, rgba(242, 101, 34, 0.16) 0%, rgba(242, 101, 34, 0) 44%),
    linear-gradient(180deg, rgba(207, 232, 213, 0.42) 0%, rgba(207, 232, 213, 0) 72%),
    var(--paper);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 20px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.92rem, 5.4vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 14px 0 18px;
  transform: rotate(-1.4deg);
  transform-origin: left center;
}

.page-about .about-hero__lede {
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.92;
  margin: 0;
  max-width: 33em;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-figure {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--about-line);
}

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

.page-about .about-figure .media__caption {
  display: block;
  padding: 9px 12px 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__figure {
  box-shadow: var(--about-shadow);
}

.page-about .about-index {
  background: var(--card);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-index__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 18px;
  padding-top: 12px;
  padding-bottom: 12px;
}

.page-about .about-index__label {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--slate);
  margin-right: 4px;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  padding: 3px 0;
  border-bottom: 2px solid transparent;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-about .about-index__link::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--orange);
  transform: skewX(-14deg);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--orange);
}

.page-about .about-body {
  padding-top: clamp(8px, 2vw, 18px);
  padding-bottom: clamp(32px, 5vw, 64px);
}

.page-about .about-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(26px, 4.6vw, 50px) 0;
  border-bottom: 1px solid var(--about-line);
  scroll-margin-top: 24px;
}

.page-about .about-chapter--last {
  border-bottom: 0;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--orange);
  margin-bottom: 8px;
}

.page-about .about-chapter h2 {
  font-family: var(--font-display);
  font-size: clamp(1.34rem, 3vw, 1.82rem);
  font-weight: 800;
  line-height: 1.38;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  max-width: 22em;
}

.page-about .about-chapter p {
  font-size: 1rem;
  line-height: 1.9;
  margin: 0 0 1em;
  max-width: 34em;
}

.page-about .about-chapter__aside {
  margin-top: 26px;
}

.page-about .about-aside {
  background: var(--card);
  border: 1px solid var(--about-line);
  border-top: 4px solid var(--green);
  padding: 16px 18px 18px;
}

.page-about .about-aside__kicker {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--slate);
  margin: 0 0 10px;
}

.page-about .about-aside__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-aside__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.9;
  border-top: 1px solid var(--about-line);
}

.page-about .about-aside__list li:first-child {
  border-top: 0;
}

.page-about .about-aside__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 7px;
  height: 7px;
  background: var(--clay);
  border-radius: 50%;
}

.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.page-about .flow-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--about-line);
  clip-path: polygon(14px 0, 100% 0, 100% 100%, 0 100%, 0 14px);
  box-shadow: 3px 3px 0 rgba(42, 46, 53, 0.07);
  padding: 14px 16px 14px;
  transition: background-color 220ms var(--ease);
}

.page-about .flow-card[open] {
  background: var(--mint);
  box-shadow: 3px 3px 0 rgba(31, 122, 61, 0.28);
}

.page-about .flow-card summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
}

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

.page-about .flow-card summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--clay);
  flex: none;
}

.page-about .flow-card[open] summary::after {
  content: "收起";
  color: var(--green);
}

.page-about .flow-card__step {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--green);
  flex: none;
}

.page-about .flow-card__title {
  flex: 1 1 auto;
}

.page-about .flow-card__body {
  padding-top: 10px;
}

.page-about .flow-card__body p {
  font-size: 14px;
  line-height: 1.85;
  margin: 0 0 10px;
  max-width: none;
}

.page-about .flow-card__meta {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--slate);
  border-top: 1px dashed var(--about-line);
  padding-top: 8px;
  margin: 0;
}

.page-about .about-figure--wide {
  margin: clamp(24px, 4vw, 44px) 0 clamp(24px, 4vw, 44px);
  border-color: var(--about-line);
  box-shadow: 8px 8px 0 rgba(14, 27, 51, 0.12);
}

.page-about .about-figure--wide img {
  aspect-ratio: 7 / 4;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  margin: 26px 0 4px;
}

.page-about .about-stat {
  background: var(--card);
  padding: 16px 12px 14px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.32rem, 3vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--green);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--slate);
}

.page-about .about-vertical {
  writing-mode: vertical-rl;
  letter-spacing: 0.36em;
  font-size: 12px;
  color: var(--slate);
  margin: 16px 0 0 auto;
  padding: 6px 0;
  border-left: 2px solid var(--clay);
  padding-left: 8px;
  display: block;
}

.page-about .about-roles {
  margin: 26px 0 0;
  border-top: 2px solid var(--ink);
}

.page-about .about-role {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-role__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  color: var(--ink);
}

.page-about .about-role__desc {
  font-size: 15px;
  line-height: 1.85;
  margin: 0;
  max-width: 30em;
}

.page-about .about-coop {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-coop details {
  background: var(--card);
  border: 1px solid var(--about-line);
  border-left: 4px solid var(--clay);
  padding: 12px 16px;
  transition: background-color 220ms var(--ease);
}

.page-about .about-coop details[open] {
  background: var(--peach);
  border-left-color: var(--orange);
}

.page-about .about-coop summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
}

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

.page-about .about-coop summary::after {
  content: "＋";
  font-family: var(--font-num);
  font-weight: 700;
  color: var(--orange);
  flex: none;
}

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

.page-about .about-coop p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.85;
  max-width: none;
}

.page-about .about-coop__note {
  margin-top: 18px;
  font-size: 15px;
}

.page-about .about-coop__note .link-arrow {
  color: var(--clay);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 1px;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about .feedback-dock {
  margin-top: clamp(8px, 2vw, 16px);
}

@media (min-width: 560px) {
  .page-about .about-role {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-stat {
    padding: 18px 16px 16px;
  }
}

@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: 84px minmax(0, 1fr) minmax(0, 292px);
    column-gap: 34px;
  }

  .page-about .about-chapter__num {
    grid-column: 1;
    grid-row: 1;
    margin-bottom: 0;
    font-size: clamp(2.2rem, 3.4vw, 3.2rem);
    padding-top: 4px;
  }

  .page-about .about-chapter__body {
    grid-column: 2;
    grid-row: 1;
    min-width: 0;
  }

  .page-about .about-chapter__aside {
    grid-column: 3;
    grid-row: 1;
    margin-top: 4px;
  }

  .page-about .about-vertical {
    margin-top: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .flow-card,
  .page-about .about-coop details {
    transition: none;
  }

  .page-about .about-hero h1 {
    transform: none;
  }
}
<<<END>>>