.page-about {
  --about-line: rgba(212, 160, 23, 0.28);
  --about-line-soft: rgba(212, 160, 23, 0.14);
  --about-card: #FCF8F0;
  --about-ink-line: rgba(14, 15, 18, 0.10);
}

/* ---------- 首屏 ---------- */
.page-about .story-hero {
  position: relative;
  padding: clamp(36px, 6vw, 88px) 0 clamp(52px, 7vw, 108px);
  overflow: hidden;
}

.page-about .story-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: center;
}

.page-about .story-hero .breadcrumb__link {
  color: var(--fq-ivory);
}

.page-about .story-hero .breadcrumb__current {
  color: var(--fq-gold);
}

.page-about .story-hero .breadcrumb__list {
  margin: 0;
}

.page-about .story-hero .eyebrow {
  display: inline-block;
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--fq-gold);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--fq-gold);
}

.page-about .story-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 5.6vw, 60px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--fq-porcelain);
  text-shadow: 0 2px 24px rgba(14, 15, 18, 0.7);
}

.page-about .story-hero__lead {
  max-width: 58ch;
  margin: 20px 0 0;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.95;
  color: var(--fq-ivory);
}

.page-about .story-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .story-hero__fact {
  padding-left: 14px;
  border-left: 1px solid var(--about-line);
}

.page-about .story-hero__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--fq-gold);
}

.page-about .story-hero__num em {
  font-style: normal;
  font-size: 0.6em;
  margin-left: 2px;
}

.page-about .story-hero__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--fq-slate);
}

.page-about .story-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.page-about .story-hero__media {
  margin: 0;
  width: 100%;
  max-width: 340px;
  justify-self: center;
}

/* ---------- 章节通用 ---------- */
.page-about .chapter {
  padding: clamp(56px, 8vw, 112px) 0;
}

.page-about .chapter--growth {
  padding-top: 0;
}

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--about-line);
  margin-bottom: clamp(22px, 3.6vw, 40px);
}

.page-about .chapter__num {
  flex: none;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.26em;
  color: var(--fq-gold);
}

.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(25px, 3.4vw, 40px);
  font-weight: 700;
  line-height: 1.26;
  color: var(--fq-text);
}

.page-about .chapter__lead {
  max-width: 62ch;
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
  color: var(--fq-slate-deep);
}

.page-about .chapter__body p {
  max-width: 66ch;
  margin: 0 0 18px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
  color: var(--fq-text);
}

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

.page-about .section--dark .chapter__title {
  color: var(--fq-porcelain);
}

.page-about .section--dark .chapter__lead,
.page-about .section--dark .chapter__body p {
  color: var(--fq-ivory);
}

.page-about .section--dark .chapter__head {
  border-top-color: var(--about-line);
}

/* ---------- 起步清单 ---------- */
.page-about .start-list {
  display: grid;
  gap: 1px;
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--about-ink-line);
  background: var(--about-ink-line);
}

.page-about .start-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 18px 20px;
  background: var(--about-card);
}

.page-about .start-list__num {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--fq-red);
}

.page-about .start-list__text {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--fq-text);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline__item {
  position: relative;
  padding: 26px 0 26px 30px;
  border-left: 1px solid var(--about-line);
  transition: border-color 0.32s var(--ease), transform 0.32s var(--ease);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 32px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--fq-gold);
  box-shadow: 0 0 0 4px rgba(212, 160, 23, 0.14);
}

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

.page-about .timeline__stage {
  display: block;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--fq-text);
}

.page-about .timeline__text {
  max-width: 46ch;
  margin: 8px 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fq-slate-deep);
}

.page-about .timeline__item:hover {
  border-left-color: var(--fq-gold);
  transform: translateX(3px);
}

/* ---------- 色板 ---------- */
.page-about .palette {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .palette__item {
  padding: 16px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius-m);
  background: rgba(242, 233, 216, 0.05);
  transition: border-color 0.32s var(--ease), transform 0.32s var(--ease);
}

.page-about .palette__item:hover {
  border-color: var(--fq-gold);
  transform: translateY(-3px);
}

.page-about .palette__swatch {
  display: block;
  height: 44px;
  border-radius: var(--radius-s);
  margin-bottom: 14px;
}

.page-about .swatch--red { background: linear-gradient(135deg, #C8102E, #7A0F1E); }
.page-about .swatch--gold { background: linear-gradient(135deg, #D4A017, #B8752E); }
.page-about .swatch--ink { background: linear-gradient(135deg, #0E0F12, #101B2B); }
.page-about .swatch--night { background: linear-gradient(135deg, #101B2B, #1B2E45); }
.page-about .swatch--jade { background: linear-gradient(135deg, #0F8B6C, #0A5F4A); }
.page-about .swatch--porcelain { background: linear-gradient(135deg, #F7F2E8, #E6DECB); }

.page-about .palette__name {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--fq-porcelain);
}

.page-about .palette__hex {
  display: block;
  margin-top: 4px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--fq-gold);
}

.page-about .palette__use {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fq-ivory);
}

/* ---------- 十二栏目 ---------- */
.page-about .chapter__banner {
  margin: 0 0 clamp(26px, 3.6vw, 42px);
}

.page-about .rail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .rail-card {
  padding: 18px 20px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius-m);
  background: var(--about-card);
  transition: border-color 0.32s var(--ease), transform 0.32s var(--ease), box-shadow 0.32s var(--ease);
}

.page-about .rail-card:hover {
  border-color: var(--fq-gold);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .rail-card__num {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--fq-copper);
}

.page-about .rail-card__name {
  margin: 8px 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--fq-text);
}

.page-about .rail-card__meta {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fq-jade);
}

.page-about .rail-card__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--fq-slate-deep);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  align-items: start;
}

.page-about .team-quad {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .team-quad__cell {
  padding: 16px 20px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--radius-m);
  background: rgba(242, 233, 216, 0.05);
  transition: border-color 0.32s var(--ease), transform 0.32s var(--ease);
}

.page-about .team-quad__cell[open] {
  border-color: var(--fq-gold);
}

.page-about .team-quad__cell:hover {
  transform: translateY(-3px);
}

.page-about .team-quad__cell summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--fq-porcelain);
}

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

.page-about .team-quad__cell summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-num);
  font-size: 18px;
  color: var(--fq-gold);
}

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

.page-about .team-quad__cell p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--fq-ivory);
}

.page-about .team-layout__media {
  margin: 0;
}

/* ---------- 里程碑 ---------- */
.page-about .milestones {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .milestone {
  position: relative;
  padding: 24px 22px;
  border: 1px solid var(--about-ink-line);
  border-radius: var(--radius-m);
  background: var(--about-card);
  overflow: hidden;
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, var(--fq-red), var(--fq-gold));
}

.page-about .milestone__num {
  display: block;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.24em;
  color: var(--fq-red);
}

.page-about .milestone__title {
  margin: 10px 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--fq-text);
}

.page-about .milestone p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--fq-slate-deep);
}

/* ---------- 收束 ---------- */
.page-about .closing {
  padding: clamp(64px, 9vw, 140px) 0 clamp(72px, 9vw, 132px);
  background: var(--fq-porcelain);
}

.page-about .closing__inner {
  max-width: 760px;
}

.page-about .closing__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1.26;
  color: var(--fq-text);
}

.page-about .closing__text {
  max-width: 60ch;
  margin: 20px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.95;
  color: var(--fq-slate-deep);
}

.page-about .link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: 32px;
}

.page-about .link-row a {
  position: relative;
  padding-bottom: 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--fq-text);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line);
  transition: color 0.26s var(--ease), border-color 0.26s var(--ease);
}

.page-about .link-row a:hover,
.page-about .link-row a:focus-visible {
  color: var(--fq-red);
  border-bottom-color: var(--fq-red);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .rail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .story-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.72fr);
  }

  .page-about .story-hero__media {
    max-width: 380px;
    justify-self: end;
  }

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

  .page-about .timeline__item {
    padding: 42px 22px 0 0;
    border-left: 0;
    border-top: 1px solid var(--about-line);
  }

  .page-about .timeline__item::before {
    left: 0;
    top: -4.5px;
  }

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

  .page-about .timeline__item:hover {
    border-left-color: transparent;
    border-top-color: var(--fq-gold);
    transform: translateY(-3px);
  }

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

@media (min-width: 1040px) {
  .page-about .rail-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__item,
  .page-about .rail-card,
  .page-about .palette__item,
  .page-about .team-quad__cell,
  .page-about .link-row a {
    transition: none;
  }

  .page-about .timeline__item:hover,
  .page-about .rail-card:hover,
  .page-about .palette__item:hover,
  .page-about .team-quad__cell:hover {
    transform: none;
  }
}