.page-about {
  --about-gap: clamp(18px, 3vw, 34px);
  background: var(--rh-cream);
  color: var(--rh-ink);
  font-family: var(--rh-sans);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .rh-media img {
  display: block;
  width: 100%;
  object-fit: cover;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 52px) 0 clamp(38px, 6vw, 78px);
  background:
    radial-gradient(120% 92% at 88% 4%, rgba(200, 162, 74, 0.24), transparent 62%),
    linear-gradient(158deg, var(--rh-purple) 0%, var(--rh-night) 78%);
  color: var(--rh-cream);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(114deg, rgba(240, 212, 138, 0.055) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(-66deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 38px);
}

.page-about .about-hero .rh-container {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 40px);
  align-items: start;
}

.page-about .about-hero__main .rh-eyebrow {
  color: var(--rh-gold-lt);
}

.page-about .about-hero__title {
  color: var(--rh-cream);
  font-family: var(--rh-serif);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 48ch;
  color: rgba(245, 237, 224, 0.86);
}

.page-about .about-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__panel {
  background: var(--rh-glass);
  border: 1px solid rgba(240, 212, 138, 0.3);
  border-radius: 18px;
  padding: 20px 22px 14px;
  backdrop-filter: blur(6px);
}

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

.page-about .about-figures__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(240, 212, 138, 0.24);
}

.page-about .about-figures__row:last-child {
  border-bottom: 0;
}

.page-about .about-figures dt {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: rgba(245, 237, 224, 0.72);
}

.page-about .about-figures dd {
  margin: 0;
  font-family: var(--rh-mono);
  font-size: 20px;
  letter-spacing: 0.04em;
  color: var(--rh-gold-lt);
}

.page-about .about-figures dd span {
  margin-left: 3px;
  font-size: 12px;
  color: rgba(245, 237, 224, 0.7);
}

/* ---------- 锚点条 ---------- */

.page-about .about-anchors {
  margin-top: 0;
}

/* ---------- 通用小标题区 ---------- */

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-head__lead {
  margin-top: 14px;
  font-size: 16.5px;
  line-height: 1.78;
  color: rgba(29, 23, 32, 0.78);
}

/* ---------- 我们做什么 ---------- */

.page-about .about-what__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-what__intro p {
  margin-top: 14px;
  font-size: 16.5px;
  line-height: 1.78;
  color: rgba(29, 23, 32, 0.8);
  max-width: 46ch;
}

.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-line {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 16px;
  padding: 18px;
  background: var(--rh-paper);
  border: 1px solid var(--rh-line);
  border-radius: 14px;
  transition: transform 0.22s var(--rh-ease), border-color 0.22s var(--rh-ease), box-shadow 0.22s var(--rh-ease);
}

.page-about .about-line:hover,
.page-about .about-line:focus-within {
  transform: translateY(-4px);
  border-color: var(--rh-gold);
  box-shadow: var(--rh-shadow);
}

.page-about .about-line__num {
  font-family: var(--rh-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--rh-gold);
  padding-top: 4px;
}

.page-about .about-line__title {
  margin: 0 0 8px;
  font-family: var(--rh-serif);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.page-about .about-line__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(29, 23, 32, 0.78);
}

.page-about .about-line__link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--rh-jade);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 143, 130, 0.42);
  transition: color 0.22s var(--rh-ease), border-color 0.22s var(--rh-ease);
}

.page-about .about-line__link:hover {
  color: var(--rh-purple);
  border-bottom-color: var(--rh-purple);
}

/* ---------- 九年历程 ---------- */

.page-about .about-timeline {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

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

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 34px 26px;
  border-left: 2px solid var(--rh-line);
  transition: background 0.22s var(--rh-ease);
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--rh-gold);
  box-shadow: 0 0 0 4px rgba(200, 162, 74, 0.18);
}

.page-about .about-tl__item:target {
  background: linear-gradient(90deg, rgba(200, 162, 74, 0.15), transparent 74%);
}

.page-about .about-tl__item:target::before {
  background: var(--rh-gold-lt);
  box-shadow: 0 0 0 7px rgba(240, 212, 138, 0.3);
}

.page-about .about-tl__node {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}

.page-about .about-tl__num {
  font-family: var(--rh-mono);
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: 0.04em;
  color: var(--rh-gold);
}

.page-about .about-tl__stage {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: rgba(29, 23, 32, 0.58);
}

.page-about .about-tl__title {
  margin: 10px 0 8px;
  font-family: var(--rh-serif);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 23px);
  letter-spacing: -0.01em;
}

.page-about .about-tl__text {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(29, 23, 32, 0.8);
}

/* ---------- 团队与分工 ---------- */

.page-about .about-team {
  background: linear-gradient(180deg, rgba(222, 210, 192, 0.34), rgba(245, 237, 224, 0) 72%);
}

.page-about .about-team__figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

.page-about .about-tracks {
  display: grid;
  gap: 16px;
}

.page-about .about-track {
  position: relative;
  padding: 26px 20px 20px;
  background: var(--rh-paper);
  border: 1px solid var(--rh-line);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.22s var(--rh-ease), border-color 0.22s var(--rh-ease), box-shadow 0.22s var(--rh-ease);
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 5px;
  background: var(--rh-jade);
}

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

.page-about .about-track--vermilion::before {
  background: var(--rh-vermilion);
}

.page-about .about-track:hover,
.page-about .about-track:focus-visible {
  transform: translateY(-6px);
  border-color: var(--rh-gold);
  box-shadow: var(--rh-shadow);
}

.page-about .about-track__title {
  margin: 0 0 10px;
  font-family: var(--rh-serif);
  font-weight: 800;
  font-size: 19px;
}

.page-about .about-track__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(29, 23, 32, 0.78);
}

.page-about .about-track__meta {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--rh-line);
  font-family: var(--rh-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: rgba(29, 23, 32, 0.58);
}

.page-about .about-flow {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: about-flow;
}

.page-about .about-flow__step {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  background: rgba(42, 27, 74, 0.05);
  border-left: 3px solid var(--rh-purple);
  border-radius: 0 12px 12px 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(29, 23, 32, 0.76);
}

.page-about .about-flow__step span {
  font-family: var(--rh-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--rh-purple);
  white-space: nowrap;
}

/* ---------- 覆盖范围与场景 ---------- */

.page-about .about-reach__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

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

.page-about .about-reach__body p {
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(29, 23, 32, 0.78);
  max-width: 48ch;
}

.page-about .about-scenes {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-scene {
  padding-left: 18px;
  border-left: 3px solid var(--rh-jade);
}

.page-about .about-scene:nth-child(2) {
  border-left-color: var(--rh-gold);
}

.page-about .about-scene:nth-child(3) {
  border-left-color: var(--rh-vermilion);
}

.page-about .about-scene__title {
  margin: 0 0 6px;
  font-family: var(--rh-serif);
  font-weight: 800;
  font-size: 17px;
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(29, 23, 32, 0.78);
}

/* ---------- 协作与坚持（深色区） ---------- */

.page-about .about-partners {
  background:
    radial-gradient(90% 70% at 10% 4%, rgba(200, 162, 74, 0.18), transparent 62%),
    linear-gradient(182deg, var(--rh-purple) 0%, var(--rh-night) 88%);
  color: var(--rh-cream);
}

.page-about .about-partners .rh-eyebrow {
  color: var(--rh-gold-lt);
}

.page-about .about-partners .about-head__lead {
  color: rgba(245, 237, 224, 0.82);
}

.page-about .about-eco {
  display: grid;
  gap: 0;
  margin-top: clamp(24px, 3vw, 34px);
  border: 1px solid rgba(240, 212, 138, 0.28);
  border-radius: 16px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-eco__item {
  padding: 18px 20px;
  border-bottom: 1px solid rgba(240, 212, 138, 0.18);
}

.page-about .about-eco__item:last-child {
  border-bottom: 0;
}

.page-about .about-eco__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--rh-mono);
  font-size: 24px;
  letter-spacing: 0.04em;
  color: var(--rh-gold-lt);
}

.page-about .about-eco__label {
  font-size: 14px;
  color: rgba(245, 237, 224, 0.82);
}

.page-about .about-acc {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-acc__mark {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-left: 10px;
  vertical-align: middle;
  border-right: 2px solid var(--rh-gold-lt);
  border-bottom: 2px solid var(--rh-gold-lt);
  transform: rotate(45deg);
  transition: transform 0.22s var(--rh-ease);
}

.page-about .rh-accordion__btn[aria-expanded="true"] .about-acc__mark {
  transform: rotate(-135deg);
}

/* ---------- 结尾指引 ---------- */

.page-about .about-next {
  padding-top: clamp(44px, 7vw, 88px);
  padding-bottom: clamp(50px, 8vw, 96px);
}

.page-about .about-next__inner {
  display: grid;
  gap: 16px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--rh-line);
  border-radius: 22px;
  background:
    radial-gradient(80% 120% at 96% 0%, rgba(200, 162, 74, 0.22), transparent 60%),
    linear-gradient(135deg, rgba(47, 143, 130, 0.12), rgba(245, 237, 224, 0.4));
}

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

.page-about .about-next__text {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(29, 23, 32, 0.78);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.page-about .about-next__links a {
  display: inline-block;
  padding: 10px 18px;
  border: 1px solid var(--rh-purple);
  border-radius: 999px;
  font-size: 14.5px;
  color: var(--rh-purple);
  text-decoration: none;
  transition: background 0.22s var(--rh-ease), color 0.22s var(--rh-ease), border-color 0.22s var(--rh-ease);
}

.page-about .about-next__links a:hover {
  background: var(--rh-purple);
  border-color: var(--rh-purple);
  color: var(--rh-cream);
}

/* ---------- 响应式 ---------- */

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

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

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

  .page-about .about-eco__item {
    border-right: 1px solid rgba(240, 212, 138, 0.18);
  }

  .page-about .about-eco__item:nth-child(2n) {
    border-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(270px, 0.65fr);
    gap: clamp(34px, 5vw, 76px);
  }

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

  .page-about .about-eco__item {
    border-bottom: 0;
    border-right: 1px solid rgba(240, 212, 138, 0.18);
  }

  .page-about .about-eco__item:nth-child(2n) {
    border-right: 1px solid rgba(240, 212, 138, 0.18);
  }

  .page-about .about-eco__item:last-child {
    border-right: 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-what__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
    gap: clamp(34px, 5vw, 72px);
  }

  .page-about .about-lines {
    margin-top: 42px;
  }

  .page-about .about-timeline {
    grid-template-columns: minmax(220px, 320px) minmax(0, 1fr);
    gap: clamp(34px, 6vw, 82px);
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: calc(var(--rh-topbar-h) + 30px);
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: center;
    gap: clamp(38px, 5vw, 76px);
  }

  .page-about .about-reach__body {
    margin-top: -40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-track,
  .page-about .about-tl__item,
  .page-about .about-next__links a,
  .page-about .about-acc__mark {
    transition: none;
  }

  .page-about .about-line:hover,
  .page-about .about-track:hover {
    transform: none;
  }
}