.page-about {
  --about-note: rgba(31, 26, 23, 0.62);
  --about-goldline: rgba(201, 162, 39, 0.55);
  background: var(--sand);
  color: var(--ink);
}

/* 面包屑 */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: clamp(16px, 3vw, 28px);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
}
.page-about .about-crumb a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-gold);
  padding-bottom: 2px;
}
.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--crimson);
  border-bottom-color: var(--crimson);
}
.page-about .about-crumb__slash {
  color: var(--gold);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 3vw, 36px) clamp(64px, 9vw, 120px);
  background:
    linear-gradient(180deg, var(--sand) 0%, var(--sand) 62%, var(--mist) 100%);
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: end;
}
.page-about .about-hero__lead {
  position: relative;
  z-index: 2;
}
.page-about .about-hero__ghost {
  position: absolute;
  top: -0.42em;
  right: -0.06em;
  z-index: 0;
  font-family: var(--font-display);
  font-size: clamp(112px, 24vw, 300px);
  font-weight: 200;
  line-height: 0.78;
  letter-spacing: 0.04em;
  white-space: nowrap;
  color: rgba(201, 162, 39, 0.12);
  -webkit-text-stroke: 1px rgba(201, 162, 39, 0.34);
  pointer-events: none;
  user-select: none;
}
.page-about .about-hero__title {
  position: relative;
  z-index: 1;
  margin: clamp(16px, 3vw, 28px) 0 0;
  max-width: 13em;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}
.page-about .about-hero__intro {
  position: relative;
  z-index: 1;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--about-note);
}
.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px clamp(24px, 4vw, 48px);
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}
.page-about .about-hero__fact dt {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
}
.page-about .about-hero__fact dd {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.1;
  color: var(--ink);
  border-bottom: 2px solid var(--gold);
  display: inline-block;
  padding-bottom: 4px;
}
.page-about .about-hero__figure {
  position: relative;
  z-index: 1;
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--mist);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero__cap {
  padding: 10px 14px 12px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--stone);
  border-top: 1px solid var(--rule-soft);
}
.page-about .about-hero__ridge {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  width: 100%;
  height: clamp(58px, 11vw, 130px);
  color: var(--gold);
  opacity: 0.7;
  pointer-events: none;
}

/* 章节头 */
.page-about .about-section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 48px);
}
.page-about .about-section-head__sub {
  max-width: 40em;
  margin: 4px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-note);
}
.page-about .about-section-head--light .about-section-head__sub {
  color: rgba(245, 239, 230, 0.78);
}

/* 缘起 */
.page-about .about-origin {
  background: var(--sand);
}
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}
.page-about .about-origin__main .heading-slab {
  margin-top: 6px;
}
.page-about .about-origin__main p {
  margin: 0 0 1.2em;
}
.page-about .about-quote {
  margin: clamp(24px, 3vw, 36px) 0;
  padding: 18px 0 18px 22px;
  border-left: 3px solid var(--crimson);
  background: linear-gradient(90deg, rgba(139, 30, 63, 0.06), transparent 70%);
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.6;
  color: var(--crimson);
}
.page-about .about-quote p {
  margin: 0;
}
.page-about .about-origin__notes {
  display: grid;
  gap: 16px;
  align-content: start;
}
.page-about .margin-note {
  padding: 14px 16px;
  background: var(--mist);
  border: 1px solid var(--rule-soft);
  border-left: 2px solid var(--about-goldline);
  transition: border-left-color 0.28s var(--ease-out), background 0.28s var(--ease-out), transform 0.28s var(--ease-out);
}
.page-about .margin-note:hover,
.page-about .margin-note:focus-visible,
.page-about .margin-note:focus-within {
  border-left-color: var(--gold);
  background: #fffdf8;
  transform: translateX(2px);
  outline: none;
}
.page-about .margin-note__tag {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
}
.page-about .margin-note__lead {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.4;
}
.page-about .margin-note__body {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--about-note);
  transition: color 0.28s var(--ease-out);
}
.page-about .margin-note:hover .margin-note__body,
.page-about .margin-note:focus-visible .margin-note__body {
  color: var(--ink);
}

/* 阶段 */
.page-about .about-stages {
  background: var(--mist);
}
.page-about .stage-layout {
  display: grid;
  gap: clamp(20px, 3vw, 48px);
}
.page-about .stage-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  -webkit-overflow-scrolling: touch;
}
.page-about .stage-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.25s var(--ease-out), background 0.25s var(--ease-out);
}
.page-about .stage-index__link span {
  font-family: var(--font-mono);
  color: var(--gold);
}
.page-about .stage-index__link:hover,
.page-about .stage-index__link:focus-visible {
  border-bottom-color: var(--gold);
  background: rgba(201, 162, 39, 0.1);
  outline: none;
}
.page-about .stage-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .stage {
  display: grid;
  gap: 8px 20px;
  padding-block: clamp(20px, 3vw, 36px);
  border-top: 1px solid var(--rule);
  scroll-margin-top: 110px;
}
.page-about .stage:last-child {
  border-bottom: 1px solid var(--rule);
}
.page-about .stage__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 300;
  line-height: 1;
  color: var(--gold);
}
.page-about .stage__kicker {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--crimson);
}
.page-about .stage__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 500;
  line-height: 1.35;
}
.page-about .stage__body p {
  margin: 0;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-note);
}
.page-about .stage__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px clamp(24px, 4vw, 44px);
  margin: 18px 0 0;
}
.page-about .stage__stat dt {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}
.page-about .stage__stat dd {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.2;
  color: var(--ink);
  border-bottom: 2px solid var(--gold);
  display: inline-block;
  padding-bottom: 3px;
}

/* 团队 */
.page-about .about-team {
  position: relative;
  background: var(--crimson);
  color: var(--mist);
  overflow: hidden;
}
.page-about .about-team::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: clamp(120px, 26vw, 340px);
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(94, 19, 42, 0.85));
  pointer-events: none;
}
.page-about .about-team .heading-slab {
  color: var(--mist);
}
.page-about .about-team .eyebrow {
  color: var(--gold-light);
}
.page-about .team-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
}
.page-about .team-figure {
  margin: 0;
  border: 1px solid rgba(245, 239, 230, 0.24);
}
.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .team-figure__cap {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(245, 239, 230, 0.7);
  border-top: 1px solid rgba(245, 239, 230, 0.2);
}
.page-about .team-list {
  display: grid;
  gap: 18px;
}
.page-about .team-item {
  padding-top: 14px;
  border-top: 1px solid rgba(245, 239, 230, 0.24);
}
.page-about .team-item__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.page-about .team-item__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
}
.page-about .team-item__count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-light);
}
.page-about .team-item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 239, 230, 0.82);
}

/* 认可 */
.page-about .about-cred {
  background: var(--sand);
}
.page-about .cred-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}
.page-about .cred-figure {
  margin: 0;
  border: 1px solid var(--rule);
  background: var(--mist);
}
.page-about .cred-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .cred-body p {
  margin: 0 0 1.2em;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-note);
}
.page-about .cred-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px clamp(16px, 3vw, 32px);
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding-top: 20px;
  border-top: 1px solid var(--rule);
}
.page-about .cred-stat dt {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}
.page-about .cred-stat dd {
  margin: 4px 0 0;
  display: inline-block;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--gold);
}
.page-about .cred-stat__num {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--crimson);
}
.page-about .cred-stat__unit {
  font-size: 13px;
  color: var(--about-note);
}
.page-about .cred-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 合作 */
.page-about .about-partner {
  background: var(--mist);
}
.page-about .about-partner__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}
.page-about .about-partner__main p {
  margin: 0 0 1.2em;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-note);
}
.page-about .about-partner__link {
  display: inline-block;
  margin-top: 4px;
  padding-bottom: 3px;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid var(--rule-gold);
}
.page-about .about-partner__link:hover,
.page-about .about-partner__link:focus-visible {
  color: var(--crimson);
  border-bottom-color: var(--crimson);
}
.page-about .partner-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .partner-item {
  padding: 18px 0;
  border-top: 1px solid var(--rule);
}
.page-about .partner-item:last-child {
  border-bottom: 1px solid var(--rule);
}
.page-about .partner-item__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}
.page-about .partner-item__name {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 500;
}
.page-about .partner-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--about-note);
}

/* 准则 */
.page-about .about-creed {
  background: var(--ink);
  color: var(--sand);
}
.page-about .about-creed .heading-slab {
  color: var(--sand);
}
.page-about .about-creed .eyebrow {
  color: var(--gold-light);
}
.page-about .creed-list {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .creed-item {
  padding-top: 16px;
  border-top: 2px solid var(--gold);
}
.page-about .creed-item__idx {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold-light);
}
.page-about .creed-item__name {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 500;
  color: var(--sand);
}
.page-about .creed-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(245, 239, 230, 0.8);
}
.page-about .about-creed__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid rgba(245, 239, 230, 0.2);
}

/* 断点 */
@media (min-width: 720px) {
  .page-about .stage {
    grid-template-columns: 76px minmax(0, 1fr);
  }
  .page-about .team-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 28px;
  }
  .page-about .partner-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 24px;
  }
  .page-about .partner-item {
    border-bottom: 1px solid var(--rule);
  }
  .page-about .creed-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-about .stage-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .stage-index {
    flex-direction: column;
    overflow: visible;
    position: sticky;
    top: 116px;
    padding-bottom: 0;
  }
  .page-about .stage-index__link {
    border-bottom: none;
    border-left: 2px solid transparent;
    padding: 10px 12px;
  }
  .page-about .stage-index__link:hover,
  .page-about .stage-index__link:focus-visible {
    border-left-color: var(--gold);
    border-bottom-color: transparent;
  }
  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }
  .page-about .cred-grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  }
  .page-about .about-partner__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
  .page-about .about-hero__figure {
    margin-top: -32px;
  }
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    align-items: start;
  }
  .page-about .about-origin__notes {
    position: sticky;
    top: 116px;
  }
}

@media (max-width: 420px) {
  .page-about .about-hero__ghost {
    font-size: 104px;
    right: -0.14em;
  }
  .page-about .cred-stats {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .about-creed__actions .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .margin-note,
  .page-about .margin-note__body,
  .page-about .stage-index__link {
    transition: none;
  }
  .page-about .margin-note:hover,
  .page-about .margin-note:focus-visible {
    transform: none;
  }
}
<<<END>>>