.page-about {
  --about-tint: rgba(224, 27, 60, .045);
  --about-rail: 168px;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  padding-block: clamp(26px, 4.4vw, 54px) clamp(34px, 5.4vw, 74px);
  color: var(--white);
}

.page-about .about-intro .eyebrow {
  color: var(--gold);
}

.page-about .about-intro__grid {
  display: grid;
  gap: clamp(30px, 4.4vw, 58px);
  margin-top: clamp(18px, 2.8vw, 34px);
}

.page-about .about-intro__title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.18;
  letter-spacing: .01em;
  color: var(--white);
}

.page-about .about-intro__title span {
  display: block;
}

.page-about .about-intro__title span:last-child {
  color: var(--ruby);
}

.page-about .about-intro__lede {
  max-width: 44ch;
  margin: 0;
  color: rgba(255, 255, 255, .78);
  font-size: clamp(.95rem, 1.6vw, 1.05rem);
}

.page-about .about-intro__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 26px) clamp(16px, 2.4vw, 28px);
  margin: 0;
  padding-top: clamp(20px, 2.6vw, 28px);
  border-top: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
}

.page-about .about-fact__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-fact__value {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.8vw, 2.15rem);
  line-height: 1.06;
  color: var(--white);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(26px, 3.6vw, 44px);
}

.page-about .about-jump__link {
  border: 1px solid var(--line-light);
  background: rgba(255, 255, 255, .04);
  color: rgba(255, 255, 255, .82);
  transition: border-color var(--ease), color var(--ease), background var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  border-color: var(--ruby);
  background: rgba(224, 27, 60, .16);
  color: var(--white);
}

@media (min-width: 900px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
  }
}

/* ---------- 缘起 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(28px, 4.2vw, 56px);
}

.page-about .about-origin .section-title {
  max-width: 22ch;
}

.page-about .about-origin__list {
  display: grid;
  gap: 14px;
  margin: clamp(22px, 3.2vw, 32px) 0 0;
  padding: clamp(18px, 2.6vw, 26px) 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-origin__list li {
  position: relative;
  padding-left: 24px;
  font-size: .96rem;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-origin__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .62em;
  width: 8px;
  height: 8px;
  background: var(--ruby);
  transform: rotate(45deg);
}

.page-about .about-origin__figure {
  margin: 0;
}

.page-about .about-origin__frame {
  aspect-ratio: 4 / 3;
  border-radius: var(--r-xl);
  overflow: hidden;
}

.page-about .about-origin__frame img,
.page-about .about-team__frame img,
.page-about .about-years__frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
  }
}

/* ---------- 三条做法 ---------- */
.page-about .about-beliefs__grid {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(26px, 3.8vw, 46px);
}

.page-about .about-belief {
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 2.6vw, 30px);
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about .about-belief::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0));
}

.page-about .about-belief:hover,
.page-about .about-belief:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.page-about .about-belief .card__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.2vw, 1.35rem);
}

.page-about .about-belief .card__text {
  margin: 0;
  font-size: .96rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-belief__make {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: .84rem;
  line-height: 1.6;
  color: var(--grey);
}

.page-about .about-belief__make span {
  flex: none;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  padding: 3px 8px;
  border-radius: var(--r-pill);
  background: var(--ruby-soft);
  color: var(--ruby);
}

@media (min-width: 780px) {
  .page-about .about-beliefs__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-beliefs__grid > :nth-child(2) {
    transform: translateY(-18px);
  }

  .page-about .about-beliefs__grid > :nth-child(2):hover {
    transform: translateY(-20px);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  color: var(--white);
}

.page-about .about-team .eyebrow {
  color: var(--gold);
}

.page-about .about-team__list {
  display: grid;
  gap: 0;
  margin-top: clamp(24px, 3.6vw, 42px);
  border-top: 1px solid var(--line-light);
}

.page-about .about-team__row {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 2.8vw, 28px) clamp(12px, 2vw, 22px);
  border-bottom: 1px solid var(--line-light);
  transition: background var(--ease);
}

.page-about .about-team__row:hover,
.page-about .about-team__row:focus-within {
  background: rgba(255, 255, 255, .035);
}

.page-about .about-team__code {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-team__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  color: var(--white);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, .74);
}

.page-about .about-team__duties {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  opacity: .6;
  transition: opacity var(--ease);
}

.page-about .about-team__row:hover .about-team__duties,
.page-about .about-team__row:focus-within .about-team__duties {
  opacity: 1;
}

.page-about .about-team__duties li {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  padding: 5px 11px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-light);
  color: rgba(255, 255, 255, .8);
  white-space: nowrap;
  transition: border-color var(--ease), color var(--ease);
}

.page-about .about-team__row:hover .about-team__duties li {
  border-color: rgba(224, 27, 60, .55);
  color: var(--white);
}

.page-about .about-team__figure {
  margin: clamp(28px, 4vw, 46px) 0 0;
}

.page-about .about-team__frame {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-xl);
  overflow: hidden;
}

@media (min-width: 860px) {
  .page-about .about-team__row {
    grid-template-columns: 56px minmax(150px, 190px) minmax(0, 1fr) auto;
    align-items: start;
    gap: clamp(16px, 2.4vw, 32px);
  }

  .page-about .about-team__code {
    padding-top: 6px;
  }

  .page-about .about-team__duties {
    margin: 2px 0 0;
    max-width: 320px;
    justify-content: flex-end;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-years__band {
  margin: clamp(24px, 3.6vw, 40px) 0 0;
}

.page-about .about-years__frame {
  aspect-ratio: 12 / 5;
  border-radius: var(--r-xl);
  overflow: hidden;
}

.page-about .about-spine {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(26px, 3.8vw, 44px);
}

.page-about .about-spine__row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 20px 18px 20px 22px;
  border-left: 1px solid var(--line);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
  transition: background var(--ease), border-color var(--ease);
}

.page-about .about-spine__row::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 28px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  transition: background var(--ease), transform var(--ease);
}

.page-about .about-spine__row:hover,
.page-about .about-spine__row:focus-visible,
.page-about .about-spine__row:focus-within {
  background: var(--about-tint);
  border-left-color: var(--ruby);
  outline: none;
}

.page-about .about-spine__row:hover::before,
.page-about .about-spine__row:focus-visible::before,
.page-about .about-spine__row:focus-within::before {
  background: var(--ruby);
  transform: scale(1.7);
}

.page-about .about-spine__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: .08em;
  font-size: clamp(1.35rem, 4vw, 1.7rem);
  color: var(--ink);
  transition: color var(--ease);
}

.page-about .about-spine__row:hover .about-spine__year,
.page-about .about-spine__row:focus-visible .about-spine__year,
.page-about .about-spine__row:focus-within .about-spine__year {
  color: var(--ruby);
}

.page-about .about-spine__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.08rem, 2.2vw, 1.3rem);
  color: var(--ink);
}

.page-about .about-spine__body p {
  margin: 0 0 10px;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-spine__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--sapphire);
}

.page-about .about-spine__band {
  position: relative;
  margin: 0;
  padding: clamp(16px, 2.2vw, 22px) clamp(18px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(.98rem, 2vw, 1.14rem);
  line-height: 1.5;
  color: var(--white);
  background: linear-gradient(105deg, var(--ink) 0%, var(--deep) 82%);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--r-lg) var(--r-lg) var(--r-lg);
  overflow: hidden;
}

.page-about .about-spine__band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 44%, rgba(201, 162, 39, .3) 50%, transparent 56%);
  pointer-events: none;
}

@media (min-width: 820px) {
  .page-about .about-spine__row {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(22px, 3vw, 44px);
    padding: 30px clamp(18px, 2.4vw, 30px) 30px 26px;
  }

  .page-about .about-spine__row::before {
    top: 38px;
  }

  .page-about .about-spine__year {
    font-size: clamp(1.6rem, 2.6vw, 2rem);
  }
}

/* ---------- 合作 ---------- */
.page-about .about-partners__bento {
  margin-top: clamp(26px, 3.8vw, 44px);
}

.page-about .about-partner {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(22px, 2.6vw, 30px);
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about .about-partner:hover,
.page-about .about-partner:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.page-about .about-partner .card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.1vw, 1.3rem);
}

.page-about .about-partner .card__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-partner--cta .about-partner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: auto;
  padding-top: clamp(14px, 2vw, 20px);
}

@media (min-width: 900px) {
  .page-about .about-partners__bento {
    align-items: stretch;
  }

  .page-about .about-partner--cta .about-partner__actions {
    padding-top: 24px;
  }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-belief,
  .page-about .about-partner,
  .page-about .about-team__duties,
  .page-about .about-spine__row,
  .page-about .about-spine__row::before,
  .page-about .about-spine__year {
    transition: none;
  }

  .page-about .about-belief:hover,
  .page-about .about-partner:hover {
    transform: none;
  }
}