.page-about {
  --about-hair: rgba(14, 58, 76, .14);
  --about-hair-strong: rgba(14, 58, 76, .3);
  --about-on-dark: rgba(251, 247, 241, .8);
  --about-on-dark-soft: rgba(251, 247, 241, .6);
  --about-hair-dark: rgba(251, 247, 241, .2);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: var(--gap-m);
  padding-bottom: var(--gap-l);
}

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

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 7.2vw, 3.5rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--c-ink);
  margin: 10px 0 var(--gap-s);
  max-width: 16ch;
}

.page-about .about-hero .lede {
  max-width: 38ch;
  font-size: 17px;
  line-height: 1.78;
  color: var(--c-slate);
  margin: 0;
}

.page-about .hero-facts {
  list-style: none;
  margin: var(--gap-m) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-xs);
  border-top: 1px solid var(--about-hair);
  padding-top: var(--gap-s);
}

.page-about .hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-facts strong {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 900;
  line-height: 1;
  color: var(--c-wood-deep);
  letter-spacing: .01em;
}

.page-about .hero-facts span {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-slate);
}

.page-about .hero-figure {
  margin: 0;
  position: relative;
  background: #fff;
  border: 1px solid var(--about-hair-strong);
  border-top: 2px solid var(--c-wood);
  padding: 8px;
  box-shadow: var(--shadow-card);
}

.page-about .hero-figure::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 30px;
  bottom: 30px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--c-sunset), transparent);
  opacity: .55;
  pointer-events: none;
}

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

.page-about .hero-figure figcaption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-slate);
  padding: 10px 4px 2px;
}

/* ---------- 品牌缘起 ---------- */
.page-about .about-origin .section-head {
  margin-bottom: var(--gap-m);
}

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

.page-about .origin-prose p {
  margin: 0 0 var(--gap-s);
  font-size: 17px;
  line-height: 1.82;
  color: var(--c-ink);
}

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

.page-about .origin-quote {
  border: 1px solid var(--about-hair-strong);
  border-left: 4px solid var(--c-wood);
  background: var(--c-wood-soft);
  padding: var(--gap-s) var(--gap-m);
  align-self: start;
}

.page-about .origin-quote blockquote {
  margin: 0;
  font-family: var(--font-head);
  font-size: 18px;
  line-height: 1.75;
  font-weight: 500;
  color: var(--c-deep);
}

/* ---------- 三类使用场景 ---------- */
.page-about .audience-grid {
  display: grid;
  gap: var(--gap-s);
  margin-top: var(--gap-m);
}

.page-about .audience-card {
  background: var(--c-paper);
  border: 1px solid var(--about-hair);
  border-top: 2px solid var(--c-tide);
  padding: var(--gap-s) var(--gap-s) var(--gap-m);
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about .audience-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.page-about .audience-card h3 {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-deep);
  margin: 14px 0 10px;
}

.page-about .audience-card > p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about .audience-need {
  margin: 0 !important;
  padding-top: 12px;
  border-top: 1px dashed var(--about-hair-strong);
  font-size: 14px !important;
  line-height: 1.65 !important;
  color: var(--c-wood-deep) !important;
}

/* ---------- 年份时间轴 ---------- */
.page-about .about-timeline .section-head {
  margin-bottom: var(--gap-m);
}

.page-about .timeline-layout {
  display: grid;
  gap: var(--gap-m);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  border-left: 2px solid rgba(201, 138, 91, .35);
  display: flex;
  gap: var(--gap-m);
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .rail-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px 0;
  position: relative;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease);
}

.page-about .rail-link::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 14px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-wood);
  opacity: .4;
  transition: opacity var(--ease), transform var(--ease), box-shadow var(--ease);
}

.page-about .rail-link:hover::before,
.page-about .rail-link:focus-visible::before {
  opacity: 1;
  transform: scale(1.3);
  box-shadow: 0 0 0 5px rgba(201, 138, 91, .22);
}

.page-about .rail-link:focus-visible {
  outline: 2px solid var(--c-sunset);
  outline-offset: 4px;
}

.page-about .rail-year {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: .01em;
  color: var(--c-wood-soft);
}

.page-about .rail-note {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--about-on-dark-soft);
}

.page-about .timeline-body {
  display: grid;
  gap: var(--gap-m);
}

.page-about .tl-item {
  scroll-margin-top: 140px;
  border-top: 1px solid var(--about-hair-dark);
  padding-top: var(--gap-s);
}

.page-about .tl-year {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.2rem, 6vw, 2.8rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--c-wood);
  margin: 0 0 10px;
}

.page-about .tl-item h3 {
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--c-paper);
  margin: 0 0 10px;
}

.page-about .tl-item p:not(.tl-year) {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-on-dark);
}

/* ---------- 中段数据条 ---------- */
.page-about .about-index {
  padding-top: var(--gap-l);
  padding-bottom: var(--gap-l);
}

.page-about .index-grid-about {
  display: grid;
  gap: var(--gap-m) var(--gap-m);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--about-hair-strong);
  padding-top: var(--gap-m);
}

.page-about .idx-stat .num-anchor {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2.3rem, 8vw, 4rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--c-wood-deep);
}

.page-about .idx-stat .num-anchor em {
  font-style: normal;
  font-size: .42em;
  font-weight: 700;
  margin-left: 4px;
  color: var(--c-slate);
}

.page-about .idx-stat p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-slate);
  max-width: 20ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team .section-head {
  margin-bottom: var(--gap-m);
}

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

.page-about .team-cards {
  display: grid;
  gap: var(--gap-s);
}

.page-about .team-card {
  background: #fff;
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--c-palm);
  padding: var(--gap-s) var(--gap-m) var(--gap-s);
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.page-about .team-count {
  margin: 0;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--c-slate);
}

.page-about .team-count strong {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 900;
  color: var(--c-palm);
  margin-right: 4px;
}

.page-about .team-card h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-deep);
  margin: 6px 0 10px;
}

.page-about .team-card > p:not(.team-count) {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-about .team-more {
  margin-top: 14px;
  border-top: 1px dashed var(--about-hair-strong);
  padding-top: 12px;
}

.page-about .team-more summary {
  cursor: pointer;
  list-style: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-wood-deep);
}

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

.page-about .team-more summary::after {
  content: "＋";
  margin-left: 8px;
  font-weight: 700;
}

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

.page-about .team-more summary:focus-visible {
  outline: 2px solid var(--c-sunset);
  outline-offset: 3px;
}

.page-about .team-more p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-slate);
}

.page-about .team-figure,
.page-about .rhythm-figure {
  margin: 0;
  background: var(--c-paper);
  border: 1px solid var(--about-hair-strong);
  border-top: 2px solid var(--c-tide);
  padding: 8px;
  align-self: start;
}

.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-about .team-figure figcaption,
.page-about .rhythm-figure figcaption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-slate);
  padding: 10px 4px 2px;
}

/* ---------- 版本与内容节奏 ---------- */
.page-about .about-rhythm .section-head {
  margin-bottom: var(--gap-m);
}

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

.page-about .rhythm-list {
  display: grid;
  gap: var(--gap-s);
}

.page-about .rhythm-item {
  border-top: 1px solid var(--about-hair-dark);
  padding-top: 16px;
}

.page-about .rhythm-num {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: .01em;
  color: var(--c-wood);
}

.page-about .rhythm-item h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-paper);
  margin: 0 0 8px;
}

.page-about .rhythm-item p {
  margin: 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--about-on-dark);
}

.page-about .rhythm-figure {
  background: rgba(251, 247, 241, .06);
  border: 1px solid var(--about-hair-dark);
  border-top: 2px solid var(--c-wood);
}

.page-about .rhythm-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .rhythm-figure figcaption {
  color: var(--about-on-dark-soft);
}

.page-about .inline-link {
  color: var(--c-wood);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
  transition: color var(--ease);
}

.page-about .inline-link:hover {
  color: var(--c-sunset);
}

.page-about .inline-link:focus-visible {
  outline: 2px solid var(--c-sunset);
  outline-offset: 3px;
}

/* ---------- 问题处理 ---------- */
.page-about .about-care .section-head {
  margin-bottom: var(--gap-m);
}

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

.page-about .care-step {
  background: var(--c-wood-soft);
  border: 1px solid var(--about-hair);
  border-top: 2px solid var(--c-wine);
  padding: var(--gap-s) var(--gap-s) var(--gap-m);
}

.page-about .care-no {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--c-wine);
  opacity: .55;
}

.page-about .care-step h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-deep);
  margin: 0 0 10px;
}

.page-about .care-step p:not(.care-no) {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-ink);
}

/* ---------- 收尾门框 ---------- */
.page-about .about-cta {
  padding-bottom: var(--gap-xl);
}

.page-about .about-cta-frame {
  background: var(--c-paper);
  border: 1px solid var(--about-hair-strong);
  border-top: 2px solid var(--c-wood);
  padding: var(--gap-m) var(--gap-s) var(--gap-m);
  box-shadow: var(--shadow-card);
}

.page-about .about-cta-frame h2 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -.015em;
  color: var(--c-deep);
  margin: 8px 0 12px;
  max-width: 22ch;
}

.page-about .about-cta-frame > p:not(.eyebrow) {
  margin: 0;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-slate);
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-xs);
  margin-top: var(--gap-m);
}

/* ---------- 中屏 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero {
    padding-top: var(--gap-l);
  }

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

  .page-about .audience-card:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .audience-card:nth-child(3) {
    margin-top: 52px;
  }

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

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

  .page-about .care-step:nth-child(2) {
    margin-top: 24px;
  }

  .page-about .about-cta-frame {
    padding: var(--gap-l) var(--gap-l) var(--gap-l);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: var(--gap-l);
    align-items: center;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: var(--gap-l);
  }

  .page-about .origin-quote {
    margin-top: 6px;
  }

  .page-about .timeline-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: var(--gap-xl);
  }

  .page-about .timeline-rail {
    position: sticky;
    top: 130px;
    align-self: start;
  }

  .page-about .rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-left: 22px;
  }

  .page-about .rail-link {
    padding: 11px 0;
  }

  .page-about .rail-link::before {
    left: -28px;
    top: 19px;
  }

  .page-about .timeline-body {
    gap: var(--gap-l);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .8fr);
    gap: var(--gap-l);
  }

  .page-about .team-figure {
    position: sticky;
    top: 130px;
  }

  .page-about .rhythm-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr);
    gap: var(--gap-l);
  }

  .page-about .rhythm-list {
    gap: var(--gap-m);
  }

  .page-about .audience-card {
    padding: var(--gap-m) var(--gap-s) var(--gap-m);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .audience-card,
  .page-about .team-card,
  .page-about .rail-link::before {
    transition: none;
  }

  .page-about .audience-card:hover,
  .page-about .team-card:hover {
    transform: none;
  }
}