.page-about {
  padding-top: calc(var(--header-h) + 20px);
  background:
    radial-gradient(90% 46% at 6% 0%, rgba(143, 184, 216, .18), transparent 62%),
    linear-gradient(180deg, var(--sand) 0%, var(--sand-hi) 40%, var(--sand) 100%);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: hidden;
}

.page-about .about-top { padding-bottom: 6px; }
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}
.page-about .breadcrumb__link {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--teal);
  border-bottom-color: var(--gold);
}
.page-about .breadcrumb__sep { color: var(--line); }

/* 首屏 */
.page-about .about-hero { padding: clamp(16px, 4vw, 34px) 0 clamp(44px, 7vw, 86px); }
.page-about .about-hero__grid { display: grid; gap: clamp(22px, 4vw, 46px); }
.page-about .about-hero__aside {
  border-top: 2px solid var(--teal-deep);
  padding-top: 14px;
}
.page-about .about-coord {
  display: inline-block;
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--teal-deep);
}
.page-about .about-hero__aside-note {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: .05em;
  color: var(--muted);
}
.page-about .about-horizon { display: block; width: 120px; height: 80px; margin-top: 18px; }
.page-about .about-horizon line { stroke: var(--blue-light); stroke-width: 1; }
.page-about .about-horizon circle { fill: var(--gold); }

.page-about .about-hero h1 {
  margin: .3em 0 .45em;
  font-family: var(--sans);
  font-weight: 800;
  font-size: clamp(2rem, 6.2vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--teal-deep);
}
.page-about .about-hero .lede {
  margin: 0;
  max-width: 44em;
  font-size: clamp(1rem, 2.1vw, 1.15rem);
  line-height: 1.9;
  color: var(--ink-soft);
}
.page-about .about-hero__text {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 章节通用 */
.page-about .about-block {
  padding: clamp(42px, 6.5vw, 86px) 0;
  border-top: 1px solid var(--line);
}
.page-about .section__head { max-width: 46em; }
.page-about .section__title { color: var(--teal-deep); }

.page-about .about-figure { margin: clamp(26px, 4vw, 46px) 0 0; }
.page-about .about-figure--band { margin-top: clamp(24px, 3.5vw, 38px); }
.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--sand-hi);
  object-fit: cover;
}
.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* 品牌起源 */
.page-about .about-origin__grid { display: grid; gap: clamp(24px, 4vw, 56px); }
.page-about .about-origin__quote {
  border-left: 2px solid var(--gold);
  padding-left: 18px;
}
.page-about .about-quote {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.3rem, 3.4vw, 1.85rem);
  line-height: 1.55;
  color: var(--teal-deep);
}
.page-about .about-quote__src {
  margin: 14px 0 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}
.page-about .about-origin__body .section__title { margin-top: 0; }
.page-about .about-origin__body .prose p {
  margin: 0 0 1em;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-soft);
}
.page-about .about-points {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .about-points li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: .94rem;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .about-points__key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--blue);
}

/* 时间带 */
.page-about .tl {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .tl-node {
  position: relative;
  padding: 0 0 24px 22px;
  border-left: 1px solid var(--line);
  transition: background-color .16s var(--ease);
}
.page-about .tl-node:last-child { padding-bottom: 0; border-left-color: var(--line); }
.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sand-hi);
  border: 1px solid var(--blue);
  transition: background-color .16s var(--ease), border-color .16s var(--ease), box-shadow .16s var(--ease);
}
.page-about .tl-node:hover::before,
.page-about .tl-node:focus::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 4px rgba(199, 154, 59, .18);
}
.page-about .tl-node:focus { outline: none; }
.page-about .tl-node:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px; }
.page-about .tl-node__year {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-deep);
}
.page-about .tl-node__title {
  margin: 6px 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--teal-deep);
  transition: color .16s var(--ease);
}
.page-about .tl-node:hover .tl-node__title { color: var(--teal); }
.page-about .tl-node__text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 团队分工 */
.page-about .team-grid { display: grid; gap: 14px; margin-top: clamp(24px, 3.5vw, 38px); }
.page-about .about-role {
  position: relative;
  padding: 22px 20px 20px;
  background: var(--sand-hi);
  border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(22, 33, 31, .04);
  transition: border-color .16s var(--ease), transform .16s var(--ease);
}
.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: var(--blue);
  transform: translateY(-2px);
}
.page-about .about-role__idx {
  position: absolute;
  top: 16px;
  right: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--blue-light);
}
.page-about .about-role__title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--teal-deep);
}
.page-about .about-role__text {
  margin: 0;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-role__meta {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--muted);
}

/* 维护流程 */
.page-about .flow { display: grid; gap: clamp(24px, 4vw, 46px); }
.page-about .flow-list { margin: 18px 0 0; padding: 0; list-style: none; }
.page-about .flow-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.page-about .flow-step:last-child { border-bottom: 1px solid var(--line); }
.page-about .flow-step__num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold-deep);
  padding-top: 5px;
}
.page-about .flow-step__title {
  margin: 0 0 5px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--teal-deep);
}
.page-about .flow-step p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--muted);
}
.page-about .about-figure--side { margin-top: 0; }

/* 服务范围 */
.page-about .scope-list {
  margin-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line);
}
.page-about .scope-row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color .16s var(--ease);
}
.page-about .scope-row:hover { background: rgba(251, 247, 239, .8); }
.page-about .scope-row__key {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--blue);
}
.page-about .scope-row__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-scope__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--ok);
  background: var(--sand-hi);
  font-size: .9rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 版本节奏与联系 */
.page-about .rhythm { max-width: 46em; }
.page-about .rhythm .section__title { margin-top: 0; }
.page-about .rhythm__text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-soft);
}
.page-about .rhythm__links {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .rhythm__links li { border-bottom: 1px solid var(--line); }
.page-about .rhythm__links a {
  display: block;
  padding: 13px 0;
  font-size: .95rem;
  line-height: 1.7;
  color: var(--teal-deep);
  text-decoration: none;
  background-image: linear-gradient(var(--gold), var(--gold));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0 1px;
  transition: background-size .18s var(--ease), color .15s var(--ease);
}
.page-about .rhythm__links a:hover,
.page-about .rhythm__links a:focus-visible {
  color: var(--teal);
  background-size: 100% 1px;
}

.page-about .about-cta {
  display: grid;
  gap: 22px;
  margin-top: clamp(32px, 5vw, 56px);
  padding: clamp(26px, 4.5vw, 48px);
  background: linear-gradient(135deg, var(--teal-deep) 0%, var(--teal) 62%, var(--blue) 100%);
  color: var(--sand-hi);
  box-shadow: 0 1px 0 rgba(22, 33, 31, .08);
}
.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(1.3rem, 3vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--sand-hi);
}
.page-about .about-cta__text {
  margin: 0;
  max-width: 38em;
  font-size: .95rem;
  line-height: 1.85;
  color: rgba(251, 247, 239, .82);
}
.page-about .about-cta__mail {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: clamp(.88rem, 2.4vw, 1.02rem);
  letter-spacing: .03em;
  color: var(--sand-hi);
  overflow-wrap: anywhere;
}

@media (min-width: 640px) {
  .page-about .about-points li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }
  .page-about .team-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 180px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
  .page-about .flow {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
  .page-about .scope-row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
    padding: 18px 0;
  }
  .page-about .rhythm__links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
    border-top: 0;
  }
  .page-about .rhythm__links li { border-top: 1px solid var(--line); }
  .page-about .about-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
  .page-about .about-cta__contact { text-align: right; }
  .page-about .about-cta__mail { margin-bottom: 16px; }
}

@media (min-width: 980px) {
  .page-about .tl {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    border-top: 1px solid var(--line);
    padding-top: 0;
  }
  .page-about .tl-node {
    border-left: 0;
    padding: 26px 18px 0 0;
  }
  .page-about .tl-node:last-child { padding-bottom: 0; padding-right: 0; }
  .page-about .tl-node::before {
    left: 0;
    top: -5px;
  }
  .page-about .tl-node__title { font-size: .98rem; min-height: 2.9em; }
  .page-about .tl-node__text { font-size: .88rem; }
}

@media (min-width: 1024px) {
  .page-about .team-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .page-about .about-role--a { grid-column: span 3; }
  .page-about .about-role--b { grid-column: span 3; }
  .page-about .about-role--c { grid-column: span 2; }
  .page-about .about-role--d { grid-column: span 4; }
  .page-about .about-role__text { font-size: .95rem; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * { transition-duration: .001ms !important; }
  .page-about .about-role:hover { transform: none; }
}

@media print {
  .page-about { padding-top: 0; background: #fff; color: #000; }
  .page-about .about-block { padding: 18px 0; border-top: 1px solid #bbb; }
  .page-about .tl { display: block; border-top: 0; }
  .page-about .tl-node {
    border-left: 1px solid #999;
    padding: 0 0 14px 16px;
    break-inside: avoid;
  }
  .page-about .about-cta {
    background: #fff;
    color: #000;
    border: 1px solid #999;
  }
  .page-about .about-cta__title,
  .page-about .about-cta__mail { color: #000; }
  .page-about .about-cta__text { color: #333; }
  .page-about .about-figure__img { border: 1px solid #999; }
}
<<<PAGE_CSS_END>>>