.page-about {
  --about-rail: 208px;
  --about-gap: clamp(1.4rem, 3.6vw, 3.4rem);
  --about-pad: clamp(2.6rem, 7vw, 5.6rem);
  background: var(--paper);
  color: var(--ink-deep);
  font-family: var(--font-sans);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .about-inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: calc(var(--header-h) + clamp(2.2rem, 6vw, 4.4rem));
  padding-bottom: clamp(2.4rem, 6vw, 4.6rem);
  background:
    repeating-linear-gradient(180deg, rgba(201, 191, 176, 0.16) 0 1px, transparent 1px 26px),
    radial-gradient(120% 90% at 88% 0%, rgba(242, 140, 56, 0.18), transparent 62%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  list-style: none;
  margin: 0 0 clamp(1.4rem, 3vw, 2.2rem);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 0.45rem;
  color: var(--line);
}

.page-about .breadcrumb-item a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .breadcrumb-item a:hover,
.page-about .breadcrumb-item a:focus-visible {
  border-bottom-color: var(--apricot);
}

.page-about .about-kicker {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--apricot-deep);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(1.1rem, 2.6vw, 1.8rem);
  max-width: 16ch;
  font-size: clamp(2.3rem, 7vw, 4.8rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-lead {
  max-width: 58ch;
  margin: 0;
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  font-weight: 500;
  color: var(--ink-deep);
}

.page-about .about-hero-facts {
  display: grid;
  gap: 1px;
  margin: clamp(2rem, 4.5vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 1rem 1.15rem;
  background: var(--white);
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--apricot-deep);
}

.page-about .fact-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding-block: var(--about-pad);
  border-bottom: 1px solid rgba(201, 191, 176, 0.55);
}

.page-about .about-section--sage {
  background: var(--sage);
}

.page-about .about-row {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-aside .section-label {
  border-left: 3px solid var(--apricot);
  padding-left: 0.9rem;
}

.page-about .label-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--apricot-deep);
}

.page-about .label-title {
  margin: 0.35rem 0 0.3rem;
  font-size: clamp(1.3rem, 3.2vw, 1.6rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--ink);
}

.page-about .label-note {
  margin: 0;
  font-size: 0.84rem;
  color: var(--steel);
}

.page-about .about-body p {
  margin: 0 0 1.1rem;
  max-width: 66ch;
  font-size: 1rem;
}

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

.page-about .about-lede {
  font-size: clamp(1.05rem, 1.9vw, 1.24rem) !important;
  font-weight: 500;
  line-height: 1.68;
  color: var(--ink);
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.4rem !important;
}

.page-about a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--apricot);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.page-about a:hover,
.page-about a:focus-visible {
  background: var(--apricot-soft);
  color: var(--apricot-deep);
}

/* ---------- 步骤卡 ---------- */
.page-about .step-list {
  list-style: none;
  margin: 0 0 clamp(1.8rem, 4vw, 2.8rem);
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .card-step {
  position: relative;
  padding: 1.3rem 1.25rem 1.4rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
}

.page-about .card-step .num {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.18rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--apricot);
  border-radius: 2px;
}

.page-about .card-step h3 {
  margin: 0 0 0.45rem;
  font-size: 1.08rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .card-step p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-deep);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

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

.page-about .figure-caption {
  padding: 0.7rem 0.9rem 0.8rem;
  font-family: var(--font-quote);
  font-style: italic;
  font-size: 0.86rem;
  color: var(--steel);
  background: var(--white);
  border-top: 1px solid var(--line);
}

/* ---------- 团队斜切块 ---------- */
.page-about .team-bleed {
  background: var(--ink);
  color: var(--paper);
  clip-path: polygon(0 2.4%, 100% 0, 100% 97.6%, 0 100%);
  padding-block: calc(var(--about-pad) + 1.6rem);
  border-bottom: 0;
}

.page-about .team-bleed .section-label {
  border-left: 3px solid var(--apricot);
  padding-left: 0.9rem;
}

.page-about .team-bleed .label-index {
  color: var(--apricot);
}

.page-about .team-bleed .label-title {
  color: var(--paper);
}

.page-about .team-bleed .label-note {
  color: rgba(247, 241, 231, 0.62);
}

.page-about .team-lede {
  max-width: 52ch;
  margin: 1.6rem 0 clamp(1.8rem, 4vw, 2.6rem);
  font-size: clamp(1rem, 1.8vw, 1.16rem);
  font-weight: 500;
  color: rgba(247, 241, 231, 0.86);
}

.page-about .team-grid {
  display: grid;
  gap: 1px;
  background: rgba(247, 241, 231, 0.18);
  border: 1px solid rgba(247, 241, 231, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-card {
  padding: 1.3rem 1.2rem 1.45rem;
  background: var(--ink);
}

.page-about .team-index {
  display: inline-block;
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--apricot);
}

.page-about .team-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.06rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .team-card p {
  margin: 0;
  font-size: 0.92rem;
  color: rgba(247, 241, 231, 0.72);
}

/* ---------- 时间线 ---------- */
.page-about .tl-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: clamp(1.6rem, 3.5vw, 2.4rem);
}

.page-about .tl-jump-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0.2rem 0.72rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 999px;
}

.page-about .tl-jump-link:hover,
.page-about .tl-jump-link:focus-visible {
  background: var(--apricot);
  border-color: var(--apricot);
  color: var(--ink);
}

.page-about .tl-wrap {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.75rem;
  border-left: 1px solid var(--line);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 1.9rem;
  scroll-margin-top: calc(var(--header-h) + 2rem);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem - 6px);
  top: 0.45rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--apricot);
  box-shadow: 0 0 0 3px var(--paper);
}

.page-about .tl-year {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--apricot-deep);
}

.page-about .tl-h {
  margin: 0 0 0.35rem;
  font-size: 1.06rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .tl-p {
  margin: 0;
  max-width: 46ch;
  font-size: 0.94rem;
  color: var(--ink-deep);
}

/* ---------- 服务规模 ---------- */
.page-about .stats-grid {
  list-style: none;
  margin: 0 0 clamp(1.6rem, 4vw, 2.4rem);
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(201, 191, 176, 0.7);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1.15rem 1.1rem 1.25rem;
  background: var(--white);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .stat-label {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--apricot-deep);
}

.page-about .stat-note {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .scale-tail {
  max-width: 60ch;
  font-size: 0.95rem;
}

/* ---------- 内容原则 ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: clamp(1.3rem, 3vw, 1.9rem);
}

.page-about .filter-btn {
  min-height: 40px;
  padding: 0.3rem 0.9rem;
  font-family: var(--font-sans);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 0.16s ease, border-color 0.16s ease;
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  border-color: var(--apricot);
}

.page-about .filter-btn[aria-pressed="true"],
.page-about .filter-btn.is-active {
  background: var(--apricot);
  border-color: var(--apricot);
}

.page-about .principle-grid {
  display: grid;
  gap: 0.85rem;
}

.page-about .principle-card {
  padding: 1.15rem 1.1rem 1.25rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 3px solid var(--steel);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lift);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.page-about .principle-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .principle-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-deep);
}

.page-about .principle-card.is-filtered-out {
  display: none;
}

.page-about .quote-note {
  margin: clamp(1.6rem, 3.5vw, 2.2rem) 0 0;
  padding: 1.15rem 1.2rem 1.2rem 1.5rem;
  font-family: var(--font-quote);
  font-style: italic;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--quote-bg);
  border-left: 3px solid var(--feedback, var(--steel));
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---------- 页尾信任段 ---------- */
.page-about .about-closing {
  padding-block: var(--about-pad);
  background: var(--paper);
}

.page-about .closing-inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.6rem);
  align-items: center;
}

.page-about .about-figure--seal {
  max-width: 420px;
}

.page-about .closing-copy h2 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .closing-copy p {
  margin: 0 0 1.4rem;
  max-width: 56ch;
  font-size: 0.98rem;
}

.page-about .closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-about .closing-actions .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1.35rem;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius);
  border: 1px solid transparent;
  border-bottom: 1px solid transparent;
}

.page-about .closing-actions .btn-primary {
  background: var(--apricot);
  color: var(--ink);
}

.page-about .closing-actions .btn-primary:hover,
.page-about .closing-actions .btn-primary:focus-visible {
  background: var(--apricot-deep);
  color: var(--ink-deep);
}

.page-about .closing-actions .btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}

.page-about .closing-actions .btn-ghost:hover,
.page-about .closing-actions .btn-ghost:focus-visible {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .principle-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .page-about .about-aside {
    position: sticky;
    top: calc(var(--header-h) + 1.6rem);
    align-self: start;
  }

  .page-about .tl-wrap {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-figure--tall {
    position: sticky;
    top: calc(var(--header-h) + 1.6rem);
  }

  .page-about .closing-inner {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  }

  .page-about .about-hero h1 {
    max-width: 20ch;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-about .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }
}
<<<PAGE_CSS_END>>>

.page-about {
  --feedback: currentColor;
}