.page-about {
  --about-rule: rgba(217, 162, 74, 0.42);
  --about-rule-soft: rgba(217, 162, 74, 0.2);
  --about-anchor: 120px;
  background-color: var(--yl-cream);
  color: var(--yl-ink);
}

.page-about [id] {
  scroll-margin-top: var(--about-anchor);
}

.page-about .yl-eyebrow {
  letter-spacing: 0.18em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -8% -6% auto -6%;
  height: 72%;
  pointer-events: none;
  background:
    radial-gradient(58% 52% at 72% 12%, rgba(200, 38, 43, 0.10), transparent 70%),
    radial-gradient(46% 46% at 12% 34%, rgba(217, 162, 74, 0.16), transparent 72%);
}

.page-about .about-hero > .yl-shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 5vw, 48px);
  margin-top: clamp(20px, 4vw, 38px);
}

.page-about .about-hero__title {
  margin: 0.4em 0 0;
  font-size: clamp(2rem, 6.4vw, 3.75rem);
  line-height: 1.12;
  letter-spacing: -0.012em;
  text-shadow: 2px 2px 0 rgba(142, 26, 31, 0.14);
}

.page-about .about-hero__lede {
  margin-top: 1.15em;
  font-size: clamp(1rem, 1.7vw, 1.14rem);
}

.page-about .about-hero__body {
  margin-top: 1em;
  max-width: 38em;
  color: var(--yl-muted);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  font-size: 0.88rem;
  background: var(--yl-sand);
  border-left: 3px solid var(--yl-vermilion);
  color: var(--yl-ink);
}

.page-about .about-fact__num {
  font-family: var(--yl-font-mono);
  font-size: 1.02rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--yl-vermilion-deep);
}

/* ---------- 图片容器 ---------- */
.page-about .about-photo {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--yl-sand);
  max-width: 100%;
}

.page-about .about-photo img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-photo--hero {
  aspect-ratio: 7 / 5;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-photo--team {
  aspect-ratio: 14 / 9;
}

.page-about .about-photo__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 7px 14px;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--yl-cream);
  background: rgba(18, 58, 50, 0.86);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-timeline__lede {
  max-width: 36em;
  margin-top: 0.9em;
}

.page-about .about-line {
  position: relative;
  margin: clamp(28px, 5vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-line::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(180deg, var(--yl-gold), rgba(217, 162, 74, 0.14));
}

.page-about .about-line__item {
  position: relative;
  padding-left: 42px;
  margin-bottom: clamp(28px, 4vw, 44px);
}

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

.page-about .about-line__dot {
  position: absolute;
  left: 2px;
  top: 7px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--yl-cream);
  border: 3px solid var(--yl-gold);
  box-sizing: border-box;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-line__item:hover .about-line__dot {
  border-color: var(--yl-vermilion);
  box-shadow: 0 0 0 7px rgba(200, 38, 43, 0.12);
}

.page-about .about-line__year {
  display: inline-block;
  margin-bottom: 6px;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--yl-vermilion);
}

.page-about .about-line__body .yl-h3 {
  margin: 0 0 0.5em;
}

.page-about .about-line__body .yl-body {
  margin: 0;
  max-width: 36em;
  color: var(--yl-muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, rgba(234, 225, 208, 0.55), rgba(247, 242, 231, 0));
}

.page-about .about-team__figure {
  margin-top: clamp(26px, 4vw, 40px);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(26px, 4vw, 38px);
}

.page-about .about-card {
  position: relative;
  padding: 26px 22px 30px;
  background: var(--yl-sand);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-card__index {
  margin: 0;
  font-size: 0.86rem;
  letter-spacing: 0.16em;
  color: var(--yl-vermilion);
}

.page-about .about-card .yl-h3 {
  margin: 0.5em 0 0.8em;
}

.page-about .about-card__list {
  margin: 0;
  padding-left: 1.05em;
  display: grid;
  gap: 8px;
}

.page-about .about-card__list li {
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-about .about-card--guide {
  border-top: 4px solid var(--yl-vermilion);
}

.page-about .about-card--quota {
  background: var(--yl-green);
  color: var(--yl-cream);
}

.page-about .about-card--quota .about-card__index {
  color: var(--yl-gold);
}

.page-about .about-card--quota .yl-h3 {
  color: var(--yl-gold-light);
}

.page-about .about-card--quota .about-card__list li {
  color: rgba(247, 242, 231, 0.9);
}

.page-about .about-card--data {
  border-top: 4px solid var(--yl-neon-blue);
}

/* ---------- 协作网络 ---------- */
.page-about .about-network__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .about-network__text .yl-h2 {
  margin-top: 0.35em;
}

.page-about .about-network__text .yl-body {
  max-width: 34em;
  color: var(--yl-muted);
  margin-top: 1em;
}

.page-about .about-network__more {
  margin-top: 1.2em;
  padding-left: 16px;
  border-left: 3px solid var(--yl-gold);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--yl-muted);
}

.page-about .about-map {
  position: relative;
  margin: 0;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background:
    radial-gradient(64% 58% at 52% 42%, var(--yl-green-mid) 0%, var(--yl-green) 72%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 30px 100%, 0 calc(100% - 30px));
}

.page-about .about-map img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.92;
}

.page-about .about-map__pin {
  position: absolute;
  transform: translate(-50%, -50%);
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 6px 11px;
  font-size: 0.8rem;
  font-weight: 700;
  white-space: nowrap;
  color: var(--yl-green);
  background: rgba(247, 242, 231, 0.95);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.page-about .about-map__pin:hover,
.page-about .about-map__pin:focus-within {
  transform: translate(-50%, -50%) scale(1.07);
  background: var(--yl-gold-light);
}

.page-about .about-map__tag {
  font-size: 0.66rem;
  font-weight: 400;
  color: var(--yl-vermilion-deep);
}

.page-about .about-map__pin--nanning { left: 34%; top: 62%; }
.page-about .about-map__pin--liuzhou { left: 55%; top: 47%; }
.page-about .about-map__pin--guilin { left: 66%; top: 26%; }
.page-about .about-map__pin--beihai { left: 46%; top: 84%; }

.page-about .about-map__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 7px 14px;
  font-size: 0.72rem;
  color: var(--yl-cream);
  background: rgba(18, 58, 50, 0.88);
}

/* ---------- 数据一览 ---------- */
.page-about .about-numbers {
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-dash {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-dash__cell {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 24px 20px 26px;
  background: var(--yl-cream);
}

.page-about .about-dash__cell--dark {
  background: var(--yl-green);
  color: var(--yl-cream);
}

.page-about .about-dash__num {
  margin: 0;
  font-family: var(--yl-font-mono);
  font-size: clamp(1.9rem, 4.6vw, 3rem);
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--yl-vermilion);
}

.page-about .about-dash__unit {
  margin-left: 6px;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--yl-muted);
}

.page-about .about-dash__cell--dark .about-dash__num {
  color: var(--yl-gold);
}

.page-about .about-dash__cell--dark .about-dash__unit {
  color: rgba(247, 242, 231, 0.72);
}

.page-about .about-dash__label {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
}

.page-about .about-dash__desc {
  margin: 0;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--yl-muted);
}

.page-about .about-dash__cell--dark .about-dash__desc {
  color: rgba(247, 242, 231, 0.78);
}

/* ---------- 年度报告 ---------- */
.page-about .about-report {
  background: linear-gradient(180deg, rgba(234, 225, 208, 0.6), rgba(247, 242, 231, 0));
}

.page-about .about-report__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
  margin-top: 0.6em;
}

.page-about .about-report__lead .yl-h2 {
  margin: 0.3em 0 0.7em;
}

.page-about .about-quote {
  margin: 0;
  padding: 6px 0 6px clamp(16px, 3vw, 30px);
  border-left: 6px solid var(--yl-vermilion);
  font-size: clamp(1.2rem, 2.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--yl-green);
}

.page-about .about-report__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .about-report__nav a {
  padding: 8px 14px;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--yl-vermilion-deep);
  text-decoration: none;
  border: 1px solid var(--yl-gold);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-about .about-report__nav a:hover {
  background: var(--yl-gold-light);
  color: var(--yl-green);
}

.page-about .about-report__body {
  display: grid;
  gap: 18px;
}

.page-about .about-report__item {
  padding: 20px 22px 22px;
  background: rgba(247, 242, 231, 0.86);
  border-left: 4px solid var(--yl-gold);
}

.page-about .about-report__item .yl-h3 {
  margin: 0 0 0.55em;
}

.page-about .about-report__item .yl-body {
  margin: 0;
  max-width: 34em;
  color: var(--yl-muted);
}

/* ---------- 使用场景 ---------- */
.page-about .about-scenes__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-scene {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 28px;
  background: var(--yl-sand);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-about .about-scene__tag {
  align-self: flex-start;
  margin: 0;
  padding: 4px 10px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--yl-cream);
  background: var(--yl-vermilion);
}

.page-about .about-scene .yl-h3 {
  margin: 0;
}

.page-about .yl-scene__desc {
  margin: 0;
  flex: 1 1 auto;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--yl-muted);
}

.page-about .about-scene__link {
  align-self: flex-start;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--yl-neon-purple);
  text-decoration: none;
  border-bottom: 2px solid rgba(108, 76, 241, 0.35);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-scene__link:hover {
  color: var(--yl-vermilion-deep);
  border-color: var(--yl-vermilion);
}

.page-about .about-scenes__more {
  margin-top: 24px;
  font-size: 0.9rem;
  line-height: 1.9;
}

.page-about .about-inline-link {
  color: var(--yl-vermilion-deep);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 返回顶部 ---------- */
.page-about .yl-totop {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--yl-cream);
  text-decoration: none;
  background: var(--yl-green);
  border: 1px solid var(--yl-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-about .yl-totop:hover {
  background: var(--yl-vermilion);
  transform: translateY(-2px);
}

.page-about .yl-totop__arrow {
  font-size: 0.95rem;
  color: var(--yl-gold);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-dash {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 760px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-line__item {
    padding-left: 210px;
  }

  .page-about .about-line::before {
    left: 169px;
  }

  .page-about .about-line__dot {
    left: 162px;
  }

  .page-about .about-line__year {
    position: absolute;
    left: 0;
    top: 8px;
    width: 140px;
    margin: 0;
    text-align: right;
    font-size: 0.9rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
  }

  .page-about .about-network__grid {
    grid-template-columns: 1fr 0.88fr;
  }

  .page-about .about-report__grid {
    grid-template-columns: 0.92fr 1.08fr;
  }

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

@media (min-width: 1000px) {
  .page-about .about-dash {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-dash__cell--wide {
    grid-column: span 2;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-line__dot,
  .page-about .about-map__pin,
  .page-about .yl-totop {
    transition: none;
  }
}