.page-about {
  --about-radius: 26px 26px 26px 8px;
  --about-line: rgba(201, 162, 39, .3);
  --about-line-cool: rgba(93, 122, 138, .32);
  background: var(--paper);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  background: var(--paper);
  padding: 26px 0 0;
}

/* ---------- 扉页 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--paper);
  padding: clamp(26px, 4vw, 46px) 0 clamp(46px, 8vw, 92px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 48% at 10% 6%, rgba(93, 122, 138, .14), transparent 70%),
    radial-gradient(46% 40% at 94% 88%, rgba(201, 162, 39, .16), transparent 72%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .eyebrow,
.page-about .about-band--paper .eyebrow {
  color: #8A6E12;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6.2vw, 64px);
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--ink-deep);
  margin: 16px 0 0;
  max-width: 14em;
}

.page-about .about-hero__lead {
  margin: 24px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.9;
  color: #3A4653;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(30px, 5vw, 54px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--paper-line);
  border: 1px solid var(--paper-line);
  border-radius: 18px;
  overflow: hidden;
}

.page-about .about-hero__facts li {
  background: var(--paper);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  letter-spacing: .02em;
  color: #A8851B;
}

.page-about .about-hero__facts li span:last-child {
  font-size: 14px;
  line-height: 1.75;
  color: #55606D;
}

/* ---------- 通用区块 ---------- */
.page-about .about-band {
  position: relative;
  padding: clamp(52px, 8vw, 100px) 0;
}

.page-about .about-band--ink { background: var(--ink); }
.page-about .about-band--deep { background: var(--ink-deep); }
.page-about .about-band--paper { background: var(--paper); }

.page-about .about-band--ink,
.page-about .about-band--deep { color: var(--body-text); }

.page-about .about-band--paper { color: var(--ink); }

.page-about .about-band h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.25;
  letter-spacing: -.01em;
  margin: 14px 0 0;
}

.page-about .about-band--ink h2,
.page-about .about-band--deep h2 { color: var(--paper); }
.page-about .about-band--paper h2 { color: var(--ink-deep); }

.page-about .about-band h3 {
  font-family: var(--font-display);
  color: var(--paper);
  line-height: 1.4;
}

.page-about .about-band--paper h3 { color: var(--ink-deep); }

.page-about .about-band p {
  max-width: 34em;
  margin: 16px 0 0;
  font-size: 16.5px;
  line-height: 1.85;
}

.page-about .about-band--ink p,
.page-about .about-band--deep p { color: var(--body-text); }
.page-about .about-band--paper p { color: #3D4854; }

.page-about .about-lead {
  font-size: 17px;
}

/* ---------- 起点 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .origin-figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--about-line);
  box-shadow: var(--shadow);
}

.page-about .origin-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .origin-lines {
  list-style: none;
  margin: 30px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--about-line-cool);
  border: 1px solid var(--about-line-cool);
  border-radius: 18px;
  overflow: hidden;
}

.page-about .origin-lines li {
  background: var(--ink-lift);
  padding: 15px 20px;
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .origin-lines .mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--gold);
  flex: none;
}

/* ---------- 三件事 ---------- */
.page-about .work-grid {
  margin-top: clamp(32px, 5vw, 58px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .work-card {
  position: relative;
  background: var(--ink);
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  padding: clamp(24px, 3vw, 34px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .work-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0) 78%);
}

.page-about .work-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .work-card__title {
  font-size: 22px;
  margin: 12px 0 0;
}

.page-about .work-card p {
  max-width: none;
  margin: 12px 0 0;
  font-size: 15.5px;
  line-height: 1.88;
}

/* ---------- 时间线 ---------- */
.page-about .tl-list {
  list-style: none;
  margin: clamp(30px, 5vw, 56px) 0 0;
  padding: 0 0 0 28px;
  position: relative;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, .1));
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 42px);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 1px solid var(--gold);
  transition: background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .tl-item:hover::before,
.page-about .tl-item:focus-within::before {
  background: var(--gold-hi);
  box-shadow: 0 0 0 5px rgba(201, 162, 39, .16);
}

.page-about .tl-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .tl-title {
  font-size: clamp(19px, 2.4vw, 23px);
  margin: 8px 0 0;
}

.page-about .tl-note {
  margin: 8px 0 0;
  font-size: 15.5px;
  line-height: 1.88;
  color: #A6B1BC;
  max-width: 40em;
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  margin-top: clamp(30px, 5vw, 54px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .team-cards {
  display: grid;
  gap: 16px;
}

.page-about .team-card {
  background: #FBF6EB;
  border: 1px solid var(--paper-line);
  border-radius: var(--about-radius);
  padding: clamp(22px, 3vw, 30px);
  box-shadow: 0 20px 42px -38px rgba(14, 27, 42, .8);
}

.page-about .team-card h3 {
  font-size: 20px;
  margin: 0;
}

.page-about .team-card p {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: #3D4854;
}

.page-about .team-card details {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--paper-line);
}

.page-about .team-card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--slate);
  transition: color .2s var(--ease);
}

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

.page-about .team-card summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: #A8851B;
}

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

.page-about .team-card summary:hover,
.page-about .team-card summary:focus-visible {
  color: #A8851B;
}

.page-about .team-figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--paper-line);
  background: #FBF6EB;
  padding: 14px;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 16px 16px 16px 4px;
}

.page-about .team-figure .figure__caption {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: #55606D;
}

.page-about .shift-strip {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--ink);
}

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

.page-about .shift-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 210px;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .shift-copy {
  padding: clamp(24px, 4vw, 40px);
}

.page-about .shift-copy .eyebrow {
  color: var(--gold);
}

.page-about .shift-copy h3 {
  font-size: clamp(19px, 2.4vw, 24px);
  margin: 12px 0 0;
}

.page-about .shift-copy p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.88;
}

/* ---------- 四条做法 ---------- */
.page-about .rule-list {
  list-style: none;
  margin: clamp(30px, 5vw, 54px) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: 20px;
  overflow: hidden;
}

.page-about .rule-item {
  background: var(--ink);
  padding: clamp(22px, 3vw, 30px);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  align-content: start;
}

.page-about .rule-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--gold);
  padding-top: 6px;
}

.page-about .rule-title {
  font-size: 20px;
  margin: 0;
}

.page-about .rule-text {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--body-text);
  max-width: none;
}

/* ---------- 内容互通 ---------- */
.page-about .peer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .peer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .peer-list li {
  background: #FBF6EB;
  border: 1px solid var(--paper-line);
  border-radius: 18px 18px 18px 6px;
  padding: 20px 22px;
}

.page-about .peer-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: #A8851B;
}

.page-about .peer-list h3 {
  font-size: 18px;
  margin: 8px 0 0;
}

.page-about .peer-list p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: #3D4854;
  max-width: none;
}

/* ---------- 下一步 ---------- */
.page-about .next-grid {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .next-card {
  display: block;
  text-decoration: none;
  background: var(--ink-lift);
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  padding: clamp(22px, 3vw, 30px);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--gold);
  transform: translateY(-3px);
}

.page-about .next-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .next-card h3 {
  font-size: 21px;
  margin: 12px 0 0;
}

.page-about .next-card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  max-width: none;
}

.page-about .next-card__go {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--gold-hi);
  border-bottom: 1px solid rgba(232, 199, 102, .45);
  padding-bottom: 2px;
}

.page-about .next-note {
  margin-top: clamp(22px, 3vw, 34px);
  font-size: 15px;
  line-height: 1.9;
}

.page-about .next-note a {
  color: var(--gold-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .next-note a:hover,
.page-about .next-note a:focus-visible {
  color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .work-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 18px;
  }

  .page-about .work-card:nth-child(2) { margin-top: 34px; }
  .page-about .work-card:nth-child(3) { margin-top: 68px; }

  .page-about .next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .rule-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }

  .page-about .origin-figure {
    transform: rotate(-1.1deg);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-about .shift-strip {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  }

  .page-about .peer-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }
}

@media (min-width: 1080px) {
  .page-about .tl-list {
    padding-left: 34px;
  }

  .page-about .tl-item::before {
    left: -34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-card,
  .page-about .tl-item::before,
  .page-about .team-card summary {
    transition: none;
  }

  .page-about .origin-figure {
    transform: none;
  }
}
<<<END>>>