.page-about {
  background: var(--ivory);
  color: var(--ink);
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--black);
  color: var(--white);
  padding: clamp(38px, 7vw, 92px) 0 clamp(46px, 8vw, 110px);
}

.page-about .about-hero__glow {
  position: absolute;
  inset: -20% -10% auto auto;
  width: min(760px, 92%);
  height: 620px;
  background:
    radial-gradient(48% 52% at 62% 34%, rgba(228, 0, 127, .42), transparent 70%),
    radial-gradient(38% 44% at 22% 68%, rgba(200, 164, 92, .22), transparent 72%);
  filter: blur(6px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(30px, 5vw, 58px);
  align-items: end;
}

.page-about .about-hero__lead h1 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(2.05rem, 6.4vw, 4.1rem);
  line-height: 1.1;
  letter-spacing: -.02em;
  margin: .35em 0 .5em;
  color: var(--white);
}

.page-about .about-hero__lead .lede {
  max-width: 36em;
  color: rgba(246, 239, 230, .86);
  font-size: var(--s3);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-about .about-index {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(200, 164, 92, .38);
  border-radius: 4px;
  padding: 18px 16px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-about .about-index__title {
  margin: 0 0 12px;
  color: var(--gold);
  letter-spacing: .14em;
  font-size: var(--s1);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index__list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px;
  border-radius: 3px;
  color: rgba(255, 255, 255, .8);
  font-size: var(--s2);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}

.page-about .about-index__list a .mono {
  color: var(--gold);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--white);
  border-left-color: var(--gold);
  background: rgba(255, 255, 255, .06);
}

.page-about .about-index__list a[data-active] {
  color: var(--pink-bright);
  border-left-color: var(--pink-bright);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: clamp(50px, 8vw, 108px) 0;
  border-top: var(--hair);
}

.page-about .about-chapter--ivory {
  background: var(--white);
}

.page-about .about-chapter--dark {
  background: var(--ink);
  color: var(--ivory);
  border-top: none;
}

.page-about .about-chapter__grid {
  display: grid;
  gap: clamp(18px, 3vw, 26px);
}

.page-about .about-chapter__num {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid rgba(228, 0, 127, .4);
  border-radius: 2px;
  color: var(--pink);
  font-size: var(--s2);
  letter-spacing: .14em;
}

.page-about .about-chapter__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.15rem);
  line-height: 1.24;
  letter-spacing: -.02em;
  margin: 14px 0 0;
}

.page-about .about-chapter--dark .about-chapter__title {
  color: var(--white);
}

.page-about .about-lead {
  font-size: var(--s3);
  line-height: 1.8;
  max-width: 34em;
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .about-lead--inverse {
  color: rgba(246, 239, 230, .88);
}

.page-about .about-note {
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 16px 18px;
  background: var(--pink-wash);
  border-left: 3px solid var(--pink);
  border-radius: 0 4px 4px 0;
  font-size: var(--s2);
  line-height: 1.7;
  max-width: 44em;
}

.page-about .about-note .tag {
  margin-right: 10px;
}

/* ---------- 01 定位 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
  align-items: start;
}

.page-about .about-audience {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-audience li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  padding-bottom: 18px;
  border-bottom: var(--hair);
}

.page-about .about-audience__tag {
  grid-row: span 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  color: var(--gold-deep);
  font-size: var(--s1);
}

.page-about .about-audience h3 {
  font-family: var(--font-serif);
  font-size: var(--s4);
  margin: 0;
  letter-spacing: -.01em;
}

.page-about .about-audience p {
  margin: 0;
  font-size: var(--s2);
  line-height: 1.8;
  color: var(--graphite);
}

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

/* ---------- 02 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 16px;
}

.page-about .about-team__card {
  position: relative;
  background: var(--white);
  border: var(--hair);
  border-radius: 4px;
  padding: 24px 22px;
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-about .about-chapter--ivory .about-team__card {
  background: var(--ivory);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus-within {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: var(--shadow-lift);
}

.page-about .about-team__count {
  font-family: var(--font-mono);
  font-size: var(--s7);
  line-height: 1;
  color: var(--pink);
  margin: 0;
  letter-spacing: -.02em;
}

.page-about .about-team__name {
  font-family: var(--font-serif);
  font-size: var(--s4);
  margin: 12px 0 8px;
}

.page-about .about-team__text {
  margin: 0 0 16px;
  font-size: var(--s2);
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-team__duties {
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  border-top: var(--hair-gold);
  display: grid;
  gap: 8px;
}

.page-about .about-team__duties li {
  position: relative;
  padding-left: 16px;
  font-size: var(--s2);
  line-height: 1.7;
}

.page-about .about-team__duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .65em;
  width: 6px;
  height: 1px;
  background: var(--pink);
}

/* ---------- 03 流程 ---------- */
.page-about .about-flow {
  list-style: none;
  counter-reset: about-flow;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--hair);
}

.page-about .about-flow__step {
  background: var(--ivory);
  padding: 20px 20px 22px;
  transition: background-color var(--t) var(--ease);
}

.page-about .about-flow__step:hover {
  background: var(--pink-wash);
}

.page-about .about-flow__num {
  color: var(--pink);
  font-size: var(--s2);
  letter-spacing: .12em;
}

.page-about .about-flow__step h3 {
  font-family: var(--font-serif);
  font-size: var(--s4);
  margin: 8px 0 6px;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: var(--s2);
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .about-rhythm {
  margin-top: clamp(26px, 4vw, 40px);
  padding: 22px 20px 20px;
  background: var(--black);
  border-radius: 4px;
}

.page-about .about-rhythm__chart svg {
  display: block;
  width: 100%;
  height: clamp(72px, 12vw, 120px);
}

.page-about .about-rhythm__caption {
  margin: 14px 0 0;
  font-size: var(--s2);
  line-height: 1.75;
  color: rgba(246, 239, 230, .78);
}

.page-about .about-process__figure {
  margin: clamp(28px, 4.5vw, 44px) 0 0;
}

/* ---------- 04 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--pink), rgba(200, 164, 92, .45));
}

.page-about .about-timeline__node {
  position: relative;
  padding-left: 32px;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 3px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--pink);
  box-shadow: 0 0 0 4px rgba(228, 0, 127, .22);
}

.page-about .about-timeline__ver {
  margin: 0;
  color: var(--gold);
  font-size: var(--s2);
  letter-spacing: .16em;
}

.page-about .about-timeline__node h3 {
  font-family: var(--font-serif);
  font-size: var(--s4);
  color: var(--white);
  margin: 8px 0 8px;
}

.page-about .about-timeline__node p {
  margin: 0;
  font-size: var(--s2);
  line-height: 1.8;
  color: rgba(246, 239, 230, .76);
}

.page-about .about-timeline__figure {
  margin: clamp(30px, 5vw, 48px) 0 0;
}

/* ---------- 05 评分 ---------- */
.page-about .about-score {
  display: grid;
  gap: 14px;
}

.page-about .about-score__row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 18px 16px;
  background: var(--ivory);
  border: var(--hair);
  border-left: 3px solid var(--pink);
  border-radius: 0 4px 4px 0;
}

.page-about .about-score__name {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--s4);
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-score__weight {
  font-size: var(--s2);
  color: var(--rose);
  letter-spacing: .1em;
}

.page-about .about-score__desc {
  grid-column: 1 / -1;
  margin: 0;
  font-size: var(--s2);
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-score__bar {
  grid-column: 1 / -1;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--line);
  overflow: hidden;
}

.page-about .about-score__bar i {
  display: block;
  height: 100%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--pink), var(--pink-bright));
  transition: width var(--t-slow) var(--ease);
}

.page-about .about-score__row--a .about-score__bar i { width: 30%; }
.page-about .about-score__row--b .about-score__bar i { width: 25%; }
.page-about .about-score__row--c .about-score__bar i { width: 25%; }
.page-about .about-score__row--d .about-score__bar i { width: 20%; }

/* ---------- 06 覆盖 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: 14px;
}

.page-about .about-coverage__item {
  padding: 20px 18px;
  border: var(--hair);
  border-top: 2px solid var(--gold);
  background: var(--white);
  border-radius: 0 0 4px 4px;
}

.page-about .about-coverage__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--s5);
  color: var(--pink);
  letter-spacing: -.01em;
}

.page-about .about-coverage__label {
  margin: 10px 0 0;
  font-size: var(--s2);
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-partner {
  margin-top: clamp(28px, 4.5vw, 44px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: var(--hair);
}

.page-about .about-partner__title {
  font-family: var(--font-serif);
  font-size: var(--s4);
  margin: 0 0 18px;
}

.page-about .about-partner__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-partner__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  padding: 14px 0;
  border-bottom: var(--hair);
  font-size: var(--s2);
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-partner__list .mono {
  color: var(--gold-deep);
  font-size: var(--s1);
  padding-top: .25em;
}

.page-about .about-partner__list strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: var(--s3);
  font-weight: 600;
}

.page-about .about-partner__cta {
  margin: 22px 0 0;
}

/* ---------- 结尾导航 ---------- */
.page-about .about-next {
  background: var(--black);
  color: var(--ivory);
  padding: clamp(46px, 7vw, 88px) 0;
}

.page-about .about-next__title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3.2vw, 1.9rem);
  color: var(--white);
  margin: 0 0 clamp(20px, 3vw, 30px);
  letter-spacing: -.02em;
}

.page-about .about-next__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-next__card {
  display: block;
  padding: 22px 20px;
  border: 1px solid rgba(223, 223, 228, .16);
  border-radius: 4px;
  text-decoration: none;
  color: inherit;
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--gold);
  background: rgba(255, 255, 255, .04);
}

.page-about .about-next__num {
  color: var(--pink-bright);
  font-size: var(--s1);
  letter-spacing: .16em;
}

.page-about .about-next__card h3 {
  font-family: var(--font-serif);
  font-size: var(--s4);
  color: var(--white);
  margin: 10px 0 8px;
}

.page-about .about-next__card p {
  margin: 0;
  font-size: var(--s2);
  line-height: 1.75;
  color: rgba(246, 239, 230, .74);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(150px, 230px) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 66px);
  }

  .page-about .about-chapter__aside {
    position: sticky;
    top: 112px;
    align-self: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

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

  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
    padding-top: 22px;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 4px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--pink), rgba(200, 164, 92, .5));
  }

  .page-about .about-timeline__node {
    padding: 26px 16px 0 0;
  }

  .page-about .about-timeline__dot {
    left: 0;
    top: 0;
  }

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

@media (min-width: 1180px) {
  .page-about .about-hero__lead h1 {
    max-width: 14em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__glow {
    display: none;
  }

  .page-about .about-team__card,
  .page-about .about-next__card,
  .page-about .about-flow__step {
    transition: none;
  }
}