.page-about {
  --about-rail: 168px;
  --about-gap: clamp(18px, 3.2vw, 46px);
  --about-edge: var(--tz-lime);
  background: var(--tz-chalk);
  color: var(--tz-ink);
  font-family: var(--tz-font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

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

.page-about .about-crumb {
  padding-top: 14px;
}

.page-about .about-crumb .breadcrumb {
  font-family: var(--tz-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3.6vw, 36px) 0 clamp(30px, 5vw, 64px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--tz-font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.05rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.page-about .about-hero__title em {
  font-style: normal;
  display: inline-block;
  padding: 0 0.12em;
  background: var(--tz-gold);
  color: var(--tz-slate);
  box-shadow: 4px 4px 0 var(--tz-ink);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: 1.0625rem;
  color: var(--tz-ink-70);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__panel {
  position: relative;
  padding: 22px 20px 30px;
  background: var(--tz-slate);
  color: var(--tz-chalk);
  border: var(--tz-border);
  box-shadow: var(--tz-shadow);
}

.page-about .about-hero__panel::after {
  content: "";
  position: absolute;
  left: -2px;
  right: -2px;
  bottom: -2px;
  height: 12px;
  background: var(--tz-gold);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.page-about .about-hero__panel-label {
  color: var(--tz-gold-soft);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-panel-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--tz-line-light);
}

.page-about .about-panel-stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-stat__num {
  font-family: var(--tz-font-mono);
  font-weight: 700;
  font-size: clamp(38px, 7vw, 58px);
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--tz-gold-soft);
}

.page-about .about-stat__unit {
  font-family: var(--tz-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(247, 243, 234, 0.78);
}

.page-about .about-hero__panel-note {
  margin: 18px 0 0;
  font-family: var(--tz-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--tz-gold-soft);
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-hero__panel {
    margin-top: 18px;
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(34px, 6vw, 78px) 0;
  border-top: var(--tz-border);
}

.page-about .about-chapter--process {
  background: #fff;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-rail__num {
  font-family: var(--tz-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  padding: 3px 8px;
  background: var(--tz-gold);
  color: var(--tz-slate);
  border: 2px solid var(--tz-ink);
}

.page-about .about-rail__note {
  font-family: var(--tz-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--tz-ink-45);
}

.page-about .about-body h2 {
  margin: 0 0 14px;
  font-family: var(--tz-font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.8vw, 2.45rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-body p {
  margin: 0 0 1.15em;
  max-width: 62ch;
  color: var(--tz-ink-70);
}

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

.page-about .about-quote {
  margin: 20px 0 !important;
  padding: 6px 0 6px 16px;
  border-left: 6px solid var(--tz-gold);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--tz-slate) !important;
  max-width: 40ch !important;
}

@media (min-width: 900px) {
  .page-about .about-chapter__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  .page-about .about-rail__note {
    writing-mode: vertical-rl;
    letter-spacing: 0.32em;
    max-height: 320px;
  }
}

/* ---------- 四个小组 ---------- */
.page-about .about-teams {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-team {
  padding: 16px 16px 18px;
  background: var(--tz-chalk);
  border: var(--tz-border);
  box-shadow: var(--tz-shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .about-team:hover {
  transform: translateY(-2px);
  box-shadow: var(--tz-shadow-hover);
}

.page-about .about-team__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-team__count {
  font-family: var(--tz-font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--tz-slate);
  letter-spacing: -0.02em;
}

.page-about .about-team__count span {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--tz-ink-45);
  margin-left: 2px;
}

.page-about .about-team h3 {
  margin: 0;
  font-family: var(--tz-font-display);
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .about-team p {
  margin: 10px 0 0 !important;
  max-width: none !important;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--tz-ink-70);
}

.page-about .about-teams__figure {
  margin: 24px 0 0;
}

@media (min-width: 760px) {
  .page-about .about-teams {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-teams > li:nth-child(even) {
    margin-top: 26px;
  }

  .page-about .about-teams__figure {
    max-width: 640px;
  }
}

/* ---------- 覆盖 ---------- */
.page-about .about-cover {
  margin: 24px 0 0;
}

.page-about .about-facts {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  border: var(--tz-border);
  background: #fff;
  box-shadow: var(--tz-shadow-sm);
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--about-edge);
}

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

.page-about .about-fact__num {
  font-family: var(--tz-font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--tz-slate);
}

.page-about .about-fact__num span {
  font-size: 14px;
  color: var(--tz-gold);
  margin-left: 2px;
}

.page-about .about-fact__label {
  font-family: var(--tz-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--tz-ink-45);
}

@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-fact:nth-child(odd) {
    border-right: 1px solid var(--about-edge);
  }

  .page-about .about-fact:nth-last-child(2) {
    border-bottom: 0;
  }
}

@media (min-width: 1000px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-fact {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    border-bottom: 0;
    border-right: 1px solid var(--about-edge);
  }

  .page-about .about-fact:last-child {
    border-right: 0;
  }
}

/* ---------- 流程 ---------- */
.page-about .about-process__intro {
  display: grid;
  gap: 20px;
  margin-bottom: 26px;
}

.page-about .about-process__figure {
  margin: 0;
  max-width: 320px;
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-step {
  position: relative;
  padding: 20px 16px 16px;
  background: var(--tz-chalk);
  border: var(--tz-border);
  box-shadow: var(--tz-shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--tz-gold);
  clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
}

.page-about .about-step:hover,
.page-about .about-step:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--tz-shadow-hover);
}

.page-about .about-step__n {
  display: block;
  font-family: var(--tz-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--tz-slate-mid);
}

.page-about .about-step__title {
  margin: 6px 0 0;
  font-family: var(--tz-font-display);
  font-size: 1.05rem;
  font-weight: 800;
}

.page-about .about-step__text {
  margin: 8px 0 0;
  max-width: none;
  font-size: 14px;
  line-height: 1.7;
  color: var(--tz-ink-70);
}

.page-about .about-step__detail {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--about-edge);
}

.page-about .about-step__summary {
  cursor: pointer;
  font-family: var(--tz-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--tz-slate);
}

.page-about .about-step__summary:focus-visible {
  outline: 2px solid var(--tz-whistle);
  outline-offset: 3px;
}

.page-about .about-step__detail p {
  margin: 8px 0 0;
  max-width: none;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--tz-ink-70);
}

@media (min-width: 720px) {
  .page-about .about-process__intro {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    align-items: start;
    gap: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
  }

  .page-about .about-steps > li:nth-child(2) {
    margin-top: 22px;
  }

  .page-about .about-steps > li:nth-child(3) {
    margin-top: 44px;
  }

  .page-about .about-steps > li:nth-child(4) {
    margin-top: 66px;
  }
}

/* ---------- 版本 ---------- */
.page-about .about-versions {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-version {
  padding: 4px 0 4px 16px;
  border-left: 4px solid var(--tz-gold);
}

.page-about .about-version__tag {
  display: inline-block;
  font-family: var(--tz-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  padding: 2px 7px;
  background: var(--tz-slate);
  color: var(--tz-chalk);
}

.page-about .about-version__title {
  margin: 10px 0 0;
  font-family: var(--tz-font-display);
  font-size: 1.02rem;
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-version__text {
  margin: 8px 0 0;
  max-width: none;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--tz-ink-70);
}

@media (min-width: 860px) {
  .page-about .about-versions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .about-version:nth-child(even) {
    margin-top: 24px;
  }
}

/* ---------- 合作方 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-partner {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 13px;
  background: #fff;
  border: var(--tz-border);
  box-shadow: var(--tz-shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.page-about .about-partner:hover,
.page-about .about-partner:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--tz-shadow-hover);
  background: var(--tz-gold-soft);
  outline: none;
}

.page-about .about-partner:focus-visible {
  outline: 2px solid var(--tz-whistle);
  outline-offset: 3px;
}

.page-about .about-partner__name {
  font-family: var(--tz-font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.01em;
}

.page-about .about-partner__meta {
  font-family: var(--tz-font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--tz-slate-mid);
}

@media (min-width: 860px) {
  .page-about .about-partner__meta {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.2s ease, opacity 0.2s ease;
  }

  .page-about .about-partner:hover .about-partner__meta,
  .page-about .about-partner:focus-visible .about-partner__meta {
    max-height: 40px;
    opacity: 1;
  }
}

/* ---------- 开放日折叠 ---------- */
.page-about .about-log {
  margin-top: 26px;
  background: var(--tz-chalk);
  border: var(--tz-border);
  box-shadow: var(--tz-shadow-sm);
}

.page-about .about-log__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--tz-font-display);
  font-weight: 800;
  font-size: 1rem;
}

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

.page-about .about-log__summary::after {
  content: "＋";
  font-family: var(--tz-font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--tz-gold);
}

.page-about .about-log[open] .about-log__summary::after {
  content: "－";
}

.page-about .about-log__summary:focus-visible {
  outline: 2px solid var(--tz-whistle);
  outline-offset: -3px;
}

.page-about .about-log__body {
  padding: 0 16px 18px;
  border-top: 1px dashed var(--about-edge);
}

.page-about .about-log__body p {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--tz-ink-70);
}

/* ---------- 页尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(36px, 6vw, 76px) 0 clamp(46px, 7vw, 88px);
  background: var(--tz-slate);
  color: var(--tz-chalk);
  border-top: var(--tz-border);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 12px;
  background: var(--tz-gold);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.page-about .about-cta .mono-label {
  color: var(--tz-gold-soft);
}

.page-about .about-cta__grid {
  display: grid;
  gap: 26px;
}

.page-about .about-cta h2 {
  margin: 10px 0 0;
  font-family: var(--tz-font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.2vw, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--tz-chalk);
}

.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 42em;
  color: rgba(247, 243, 234, 0.82);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 18px 0 0;
  font-family: var(--tz-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
}

.page-about .about-cta__links a {
  color: var(--tz-gold-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  border-bottom-color: var(--tz-gold-soft);
  outline: none;
}

.page-about .about-cta__links a:focus-visible {
  outline: 2px solid var(--tz-whistle);
  outline-offset: 3px;
}

@media (min-width: 880px) {
  .page-about .about-cta__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: end;
    gap: 48px;
  }

  .page-about .about-cta__side {
    padding-bottom: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team,
  .page-about .about-step,
  .page-about .about-partner,
  .page-about .about-partner__meta {
    transition: none;
  }

  .page-about .about-team:hover,
  .page-about .about-step:hover,
  .page-about .about-step:focus-within,
  .page-about .about-partner:hover,
  .page-about .about-partner:focus-visible {
    transform: none;
  }
}
<<<END>>>