.page-about {
  --about-rule-soft: rgba(44, 74, 62, 0.6);
  --about-gap: clamp(2.4rem, 7vw, 5.5rem);
  --about-prose: 34rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .prose {
  max-width: var(--about-prose);
}

.page-about .prose p {
  margin: 0 0 1.1rem;
  line-height: 1.85;
  color: var(--paper);
}

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

.page-about .prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 面包屑 ---------- */

.page-about .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 1.4rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.page-about .crumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--rule);
}

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

.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: 0 0 clamp(2.4rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 84% -10%, rgba(41, 224, 200, 0.16), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-deep) 100%);
  border-bottom: 1px solid var(--rule);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
  padding-top: clamp(1.8rem, 5vw, 3.2rem);
}

.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.32em;
  color: var(--cyan);
}

.page-about .display-xl {
  margin: 0.6rem 0 1.3rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.7rem, 11.5vw, 7rem);
  line-height: 0.94;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .lede {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  line-height: 1.9;
  color: var(--paper);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin: 1.8rem 0 0;
}

.page-about .side-note {
  writing-mode: vertical-rl;
  margin: 0;
  padding-right: 0.7rem;
  border-right: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.34em;
  color: var(--mute);
  justify-self: start;
}

/* ---------- 指标条 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  list-style: none;
  margin: clamp(2rem, 5vw, 3.4rem) 0 0;
  padding: 0;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .metric {
  padding: 1.1rem 1rem 1.2rem;
  background: var(--ink-deep);
}

.page-about .metric__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-about .metric__num {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.25rem, 4.6vw, 1.9rem);
  line-height: 1.1;
  color: var(--cyan);
  white-space: nowrap;
}

/* ---------- 色带 ---------- */

.page-about .about-band {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: var(--band-h);
  padding: 0 clamp(1rem, 4vw, 5rem);
  background: var(--ink-deep);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.4em;
  color: rgba(242, 245, 241, 0.75);
}

.page-about .about-band--wine {
  background: var(--wine);
  border-color: transparent;
  color: rgba(242, 245, 241, 0.9);
}

.page-about .about-band--violet {
  background: var(--violet);
  border-color: transparent;
  color: rgba(242, 245, 241, 0.9);
}

/* ---------- 章节 ---------- */

.page-about .chapter {
  padding: clamp(2.8rem, 7vw, 5.5rem) 0;
}

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

.page-about .section-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding-bottom: 1.2rem;
  margin-bottom: clamp(1.8rem, 4vw, 3rem);
  border-bottom: 1px solid var(--rule);
}

.page-about .section-head__num {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.36em;
  color: var(--cyan);
}

.page-about .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.7rem, 5.4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

/* ---------- 立站初衷 ---------- */

.page-about .founding-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

/* ---------- 图片框 ---------- */

.page-about .media-frame {
  margin: 0;
  background: var(--ink);
  border: 1px solid var(--rule);
}

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

.page-about .media-frame__cap {
  padding: 0.7rem 0.9rem;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--mute);
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 5vw, 3.5rem);
  align-items: center;
}

.page-about .ring {
  display: block;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

.page-about .ring circle {
  fill: none;
  stroke-width: 18;
  transform-box: fill-box;
  transform-origin: center;
  transform: rotate(-90deg);
}

.page-about .ring__track {
  stroke: var(--rule);
}

.page-about .ring__seg--1 {
  stroke: var(--cyan);
}

.page-about .ring__seg--2 {
  stroke: var(--cyan-soft);
}

.page-about .ring__seg--3 {
  stroke: var(--mute);
}

.page-about .ring__center {
  fill: var(--paper);
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
}

.page-about .ring__unit {
  fill: var(--mute);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
}

.page-about .ring-key {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.2rem;
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--mute);
}

.page-about .ring-key li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.page-about .ring-key__dot {
  width: 9px;
  height: 9px;
  display: inline-block;
}

.page-about .ring-key__dot--a {
  background: var(--cyan);
}

.page-about .ring-key__dot--b {
  background: var(--cyan-soft);
}

.page-about .ring-key__dot--c {
  background: var(--mute);
}

.page-about .role-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .role {
  padding: 1.2rem 1.1rem 1.3rem;
  background: var(--ink);
}

.page-about .role__title {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  margin: 0 0 0.5rem;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--paper);
}

.page-about .role__key {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .role__body {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .role:hover,
.page-about .role:focus-within {
  background: var(--ink-deep);
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.6rem;
  border-left: 1px solid var(--rule);
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(1.4rem, 4vw, 2.2rem);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1.6rem - 4.5px);
  top: 0.5rem;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  transition: transform 240ms ease-out;
}

.page-about .timeline__item--gold::before {
  background: var(--gold);
}

.page-about .timeline__item:hover::before {
  transform: scale(1.7);
}

.page-about .tl-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.8rem;
}

.page-about .tl-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 4vw, 1.7rem);
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .timeline__item--gold .tl-num {
  color: var(--gold);
}

.page-about .tl-title {
  margin: 0;
  font-size: clamp(1rem, 2.6vw, 1.15rem);
  font-weight: 600;
  color: var(--paper);
}

.page-about .tl-note {
  margin: 0.4rem 0 0;
  max-width: 44ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .tl-extra {
  margin: 0.5rem 0 0;
  max-width: 44ch;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.75;
  color: var(--mute);
  border-left: 1px solid var(--rule);
  padding-left: 0;
  transition: max-height 320ms ease-out, opacity 320ms ease-out, padding-left 320ms ease-out;
}

.page-about .timeline__item:hover .tl-extra,
.page-about .timeline__item:focus-within .tl-extra {
  max-height: 10rem;
  opacity: 1;
  padding-left: 0.8rem;
}

/* ---------- 流程 ---------- */

.page-about .process-media {
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .step-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .step {
  padding: 1.2rem 1.1rem 1.3rem;
  background: var(--ink);
}

.page-about .step__sum {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  cursor: pointer;
  list-style: none;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--paper);
}

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

.page-about .step__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--cyan);
}

.page-about .step details[open] .step__sum::after {
  content: "–";
}

.page-about .step__idx {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .step__body {
  margin: 0.8rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .step__sum:focus-visible {
  outline: 1px solid var(--cyan-soft);
  outline-offset: 4px;
}

/* ---------- 合作 ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 5vw, 3.2rem);
  align-items: start;
}

.page-about .partner-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-about .partner-facts li {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 1.1rem;
  background: var(--ink);
}

.page-about .partner-facts__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 6vw, 2.3rem);
  line-height: 1;
  color: var(--gold);
}

.page-about .partner-facts__label {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 沙龙 ---------- */

.page-about .salon-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

/* ---------- 结尾行动区 ---------- */

.page-about .about-cta {
  padding: clamp(2.6rem, 7vw, 4.5rem) 0 clamp(3rem, 8vw, 5rem);
  background: linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 100%);
  border-top: 1px solid var(--rule);
}

.page-about .cta-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 5vw, 2.6rem);
  line-height: 1.1;
  color: var(--paper);
}

.page-about .cta-text {
  margin: 0 0 1.6rem;
  max-width: 40ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mute);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

/* ---------- 响应式 ---------- */

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

  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: 9fr 3fr;
    align-items: start;
    gap: 3rem;
  }

  .page-about .side-note {
    justify-self: end;
  }

  .page-about .section-head {
    grid-template-columns: 8fr 4fr;
    align-items: end;
    gap: 2rem;
  }

  .page-about .founding-grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .team-grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .partner-grid {
    grid-template-columns: 6fr 6fr;
  }

  .page-about .salon-grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .timeline {
    padding-left: 2.2rem;
  }

  .page-about .timeline__item::before {
    left: calc(-2.2rem - 4.5px);
  }
}

@media (min-width: 1100px) {
  .page-about .step-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .cta-grid {
    display: grid;
    grid-template-columns: 7fr 5fr;
    align-items: end;
    gap: 2rem;
  }

  .page-about .cta-title {
    grid-column: 1 / 2;
  }

  .page-about .cta-text {
    grid-column: 1 / 2;
    margin-bottom: 0;
  }

  .page-about .cta-actions {
    grid-column: 2 / 3;
    grid-row: 1 / 3;
    align-self: end;
    justify-content: flex-end;
  }
}
<<<END>>>