.page-about {
  --about-gap: 16px;
  background: var(--hm-ink);
  color: var(--hm-paper);
  font-family: var(--hm-sans);
  overflow-x: clip;
  padding-bottom: 8px;
}

.page-about a:focus-visible,
.page-about [tabindex]:focus-visible {
  outline: 2px solid var(--hm-gold-lt);
  outline-offset: 3px;
  border-radius: 8px;
}

/* 首屏 */
.page-about .about-hero {
  padding: 26px 0 10px;
  background:
    radial-gradient(95% 55% at 90% -10%, rgba(200, 162, 74, 0.14), transparent 62%),
    radial-gradient(70% 55% at -5% 18%, rgba(46, 74, 64, 0.4), transparent 70%);
}

.page-about h1 {
  margin: 16px 0 0;
  font-family: var(--hm-serif);
  font-weight: 800;
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.16;
  letter-spacing: 0.01em;
  color: var(--hm-paper);
}

.page-about .about-hero-lead .hm-lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(243, 238, 227, 0.78);
}

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

.page-about .about-hero-grid {
  display: grid;
  gap: 26px;
  margin-top: 26px;
}

.page-about .about-hero-grid > * {
  animation: about-fade 0.7s var(--hm-ease) both;
}

.page-about .about-hero-grid > *:nth-child(2) {
  animation-delay: 0.08s;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hm-line);
  border: 1px solid var(--hm-line);
  border-radius: var(--hm-radius);
  overflow: hidden;
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--hm-ink-2);
}

.page-about .about-figure .hm-num {
  font-family: var(--hm-mono);
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--hm-gold);
}

.page-about .about-figure span:last-child {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--hm-stone);
}

.page-about .about-figure--wide {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: baseline;
  gap: 12px;
  background: linear-gradient(90deg, rgba(178, 59, 46, 0.18), var(--hm-ink-2) 62%);
}

.page-about .about-hero-collage {
  display: grid;
  gap: var(--about-gap);
  margin-top: 30px;
}

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

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--hm-line);
}

.page-about .hm-figure-caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--hm-stone);
}

.page-about .about-quote {
  margin: 0;
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  border: 1px solid var(--hm-line);
  border-radius: var(--hm-radius);
  background: linear-gradient(155deg, rgba(46, 74, 64, 0.9), rgba(23, 26, 24, 0.96));
  font-family: var(--hm-serif);
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(19px, 3vw, 24px);
  line-height: 1.6;
  color: var(--hm-paper);
}

.page-about .about-quote cite {
  font-family: var(--hm-mono);
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--hm-gold-lt);
}

.page-about .about-quote cite::before {
  content: "— ";
}

/* 双栏主体 */
.page-about .about-body {
  display: grid;
  gap: 20px;
  padding: 42px 0 0;
}

.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail-title {
  margin: 0 0 10px;
  font-family: var(--hm-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--hm-stone);
}

.page-about .about-rail .hm-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-rail .hm-rail-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail .hm-rail-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 14px;
  white-space: nowrap;
  font-size: 13.5px;
  text-decoration: none;
  color: var(--hm-stone);
  border: 1px solid var(--hm-line);
  border-radius: 999px;
  background: rgba(23, 26, 24, 0.7);
  transition: color 0.3s var(--hm-ease), border-color 0.3s var(--hm-ease), background 0.3s var(--hm-ease);
}

.page-about .about-rail .hm-rail-link .hm-num {
  font-family: var(--hm-mono);
  font-size: 11px;
  color: var(--hm-brass);
}

.page-about .about-rail .hm-rail-link:hover {
  color: var(--hm-paper);
  border-color: rgba(200, 162, 74, 0.48);
}

.page-about .about-rail .hm-rail-link[data-active] {
  color: var(--hm-ink);
  background: var(--hm-gold);
  border-color: var(--hm-gold);
}

.page-about .about-rail .hm-rail-link[data-active] .hm-num {
  color: rgba(13, 15, 14, 0.7);
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-section {
  padding: 36px 0;
  border-top: 1px solid var(--hm-line-soft);
  scroll-margin-top: 96px;
}

.page-about .about-content > .about-section:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .about-h2 {
  margin: 12px 0 18px;
  font-family: var(--hm-serif);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.3;
  color: var(--hm-paper);
}

.page-about .about-h3 {
  margin: 14px 0 8px;
  font-family: var(--hm-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--hm-gold-lt);
}

.page-about .about-p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(243, 238, 227, 0.78);
}

/* 时间轴 */
.page-about .about-timeline-wrap {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(200, 162, 74, 0.55), rgba(200, 162, 74, 0.06));
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 28px 34px;
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 7px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--hm-ink);
  border: 1px solid var(--hm-red);
  box-shadow: 0 0 0 4px rgba(178, 59, 46, 0.13);
}

.page-about .about-tl-year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--hm-mono);
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--hm-gold);
}

.page-about .about-tl-title {
  margin: 0 0 6px;
  font-family: var(--hm-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--hm-paper);
}

.page-about .about-tl-item .about-p {
  margin: 0;
  font-size: 14.5px;
}

.page-about .about-tl-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--hm-line);
}

/* 团队 */
.page-about .about-team-intro {
  display: grid;
  gap: 18px;
  margin-bottom: 6px;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--hm-line);
}

.page-about .about-team-grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-team-card {
  position: relative;
  padding: 20px 18px 20px 22px;
  border: 1px solid var(--hm-line);
  border-radius: var(--hm-radius);
  background: var(--hm-ink-2);
  transition: transform 0.3s var(--hm-ease), border-color 0.3s var(--hm-ease), background 0.3s var(--hm-ease);
}

.page-about .about-team-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 3px;
  background: var(--hm-green);
  opacity: 0.85;
}

.page-about .about-team-card--red::before {
  background: var(--hm-red);
}

.page-about .about-team-card:hover {
  transform: translateY(-2px);
  border-color: rgba(200, 162, 74, 0.5);
  background: #1b1f1c;
}

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

.page-about .about-team-name {
  margin: 0;
  font-family: var(--hm-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--hm-paper);
}

.page-about .about-team-count {
  margin-left: auto;
  font-family: var(--hm-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--hm-gold-lt);
}

.page-about .about-team-line {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--hm-stone);
}

.page-about .about-team-detail {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(243, 238, 227, 0.72);
  transition: max-height 0.45s var(--hm-ease), opacity 0.35s var(--hm-ease), margin-top 0.35s var(--hm-ease);
}

/* 更新节奏 */
.page-about .about-cadence {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.page-about .about-cad-card {
  padding: 20px 18px;
  border: 1px solid var(--hm-line);
  border-radius: 16px;
  background: var(--hm-ink-2);
}

.page-about .about-cad-card--hero {
  background: linear-gradient(135deg, rgba(46, 74, 64, 0.62), var(--hm-ink-2) 72%);
  border-color: rgba(111, 143, 124, 0.34);
}

.page-about .about-cad-card .hm-num {
  display: block;
  font-family: var(--hm-mono);
  font-size: clamp(28px, 5.4vw, 40px);
  line-height: 1;
  color: var(--hm-gold);
}

.page-about .about-unit {
  margin-left: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--hm-stone);
}

.page-about .about-cad-card .about-h3 {
  margin: 12px 0 6px;
  font-size: 16px;
  color: var(--hm-paper);
}

.page-about .about-cad-card .about-p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
}

/* 气质：浅色块 */
.page-about .about-ethos {
  position: relative;
  overflow: hidden;
  margin: 40px 0 8px;
  padding: 30px 22px;
  border-radius: 28px;
  background: var(--hm-paper);
  color: var(--hm-ink);
  border-top: 0;
}

.page-about .about-ethos::after {
  content: "";
  position: absolute;
  right: -70px;
  top: -70px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 162, 74, 0.26), transparent 68%);
  pointer-events: none;
}

.page-about .about-ethos-inner {
  position: relative;
  display: grid;
  gap: 20px;
}

.page-about .about-ethos .hm-eyebrow {
  color: var(--hm-brass);
}

.page-about .about-ethos .about-h2 {
  margin-top: 10px;
  color: var(--hm-ink);
}

.page-about .about-ethos .about-p {
  color: rgba(13, 15, 14, 0.78);
}

.page-about .about-ethos-quote {
  margin: 0 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--hm-red);
  font-family: var(--hm-serif);
  font-size: clamp(16px, 2.8vw, 20px);
  line-height: 1.7;
  color: rgba(13, 15, 14, 0.9);
}

.page-about .about-rules {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rules li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  padding: 15px 0;
  border-top: 1px solid rgba(13, 15, 14, 0.14);
}

.page-about .about-rules li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-rules .hm-num {
  font-family: var(--hm-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--hm-brass);
}

.page-about .about-rules strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--hm-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--hm-ink);
}

.page-about .about-rule-text {
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(13, 15, 14, 0.7);
}

/* 电脑端体验 */
.page-about .about-promise {
  margin-top: 4px;
  padding: 28px 20px;
  border-radius: 26px;
  border: 1px solid var(--hm-line-soft);
  background: linear-gradient(160deg, var(--hm-teal), #1a2823 80%);
}

.page-about .about-promise .about-h2 {
  margin-top: 10px;
}

.page-about .about-promise .about-p {
  color: rgba(243, 238, 227, 0.84);
}

.page-about .about-steps {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  padding: 15px 14px;
  border: 1px solid var(--hm-line);
  border-radius: 14px;
  background: rgba(13, 15, 14, 0.38);
}

.page-about .about-step .hm-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--hm-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--hm-gold);
}

.page-about .about-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(243, 238, 227, 0.84);
}

.page-about .about-promise-note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--hm-line);
  font-size: 13.5px;
  color: var(--hm-gold-lt);
}

/* 页尾入口 */
.page-about .about-links {
  display: grid;
  gap: 10px;
  margin-top: 28px;
  padding-bottom: 64px;
}

.page-about .about-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 17px 18px;
  border: 1px solid var(--hm-line);
  border-radius: 14px;
  text-decoration: none;
  color: var(--hm-paper);
  background: rgba(23, 26, 24, 0.6);
  transition: transform 0.3s var(--hm-ease), border-color 0.3s var(--hm-ease), background 0.3s var(--hm-ease);
}

.page-about .about-link strong {
  font-family: var(--hm-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--hm-gold-lt);
}

.page-about .about-link span {
  font-size: 12.5px;
  line-height: 1.5;
  text-align: right;
  color: var(--hm-stone);
}

.page-about .about-link:hover {
  transform: translateY(-2px);
  border-color: rgba(200, 162, 74, 0.5);
  background: var(--hm-ink-2);
}

@keyframes about-fade {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cadence {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-cad-card {
    grid-column: span 3;
  }

  .page-about .about-cad-card--hero {
    grid-column: span 6;
  }

  .page-about .about-cad-card--s {
    grid-column: span 2;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero-collage {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: stretch;
    margin-top: 34px;
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 1fr) 264px;
    align-items: start;
    gap: 34px;
  }

  .page-about .about-tl-figure {
    position: sticky;
    top: 104px;
  }

  .page-about .about-team-intro {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 30px;
    align-items: center;
  }

  .page-about .about-ethos {
    padding: 48px 44px;
  }

  .page-about .about-ethos-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 44px;
  }

  .page-about .about-promise {
    padding: 44px 42px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: var(--hm-rail) minmax(0, 1fr);
    gap: 54px;
    align-items: start;
    padding-top: 58px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }

  .page-about .about-rail .hm-rail-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail .hm-rail-link {
    border-radius: 10px;
    border-color: transparent;
    background: transparent;
    padding: 11px 12px;
  }

  .page-about .about-section {
    padding: 48px 0;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 268px;
    gap: 48px;
    align-items: end;
  }
}

/* 悬停展开职责说明 */
@media (hover: hover) and (pointer: fine) {
  .page-about .about-team-card:hover .about-team-detail,
  .page-about .about-team-card:focus-within .about-team-detail,
  .page-about .about-team-card:focus .about-team-detail {
    max-height: 240px;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (hover: none) {
  .page-about .about-team-detail {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }
}
<<<END>>>