.page-about {
  --about-rail-pad: clamp(28px, 4vw, 48px);
  --about-dot: 14px;
}

.page-about .about-hero {
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 5vw, 64px);
  background:
    radial-gradient(circle at 92% 6%, rgba(181, 227, 42, .26), transparent 40%),
    radial-gradient(circle at 4% 96%, rgba(107, 46, 143, .13), transparent 44%),
    var(--paper);
  border-bottom: 1px solid var(--blue-line);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-about .about-hero__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -.022em;
  color: var(--ink);
  margin: 12px 0 0;
  max-width: 17ch;
}

.page-about .about-hero__lede {
  margin-top: 18px;
  max-width: 34ch;
  color: var(--ink);
}

.page-about .about-hero__side {
  border-left: 2px solid var(--grape);
  padding-left: clamp(16px, 2vw, 24px);
}

.page-about .about-hero__side-label {
  color: var(--moss);
  margin: 0;
}

.page-about .about-hero__ver {
  font-family: var(--ff-geo);
  font-weight: 200;
  font-size: clamp(60px, 11vw, 116px);
  line-height: .88;
  letter-spacing: -.045em;
  color: var(--grape-deep);
  margin: 6px 0 12px;
}

.page-about .about-hero__side-note {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 30ch;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--blue-line);
  border: 1px solid var(--blue-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--paper);
  padding: clamp(14px, 2vw, 22px);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-stat__num {
  font-family: var(--ff-geo);
  font-weight: 300;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--grape);
}

.page-about .about-stat__label {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .07em;
  color: var(--moss);
}

/* ---------- 为什么反复调整 ---------- */

.page-about .about-why {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--paper);
}

.page-about .about-why__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 40px);
}

.page-about .about-why__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--ink);
  margin: 10px 0 20px;
  max-width: 22ch;
}

.page-about .about-why__text {
  font-size: 17px;
  line-height: 1.78;
  color: var(--ink);
  margin: 0 0 16px;
  max-width: 36ch;
}

.page-about .about-why__side {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .why-card {
  border: 1px solid var(--blue-line);
  border-radius: var(--r-md);
  padding: clamp(16px, 2vw, 22px);
  background: var(--paper-2);
}

.page-about .why-card--deep {
  background: var(--grape-deep);
  border-color: var(--grape-deep);
}

.page-about .why-card--deep .why-card__label,
.page-about .why-card--deep .why-card__note {
  color: rgba(248, 242, 231, .78);
}

.page-about .why-card--deep .why-card__num {
  color: var(--lime);
}

.page-about .why-card__label {
  color: var(--moss);
  margin: 0 0 6px;
}

.page-about .why-card__num {
  font-family: var(--ff-geo);
  font-weight: 300;
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--grape);
  margin: 0 0 8px;
}

.page-about .why-card__note {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink);
  margin: 0;
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--paper-2);
  border-top: 1px solid var(--blue-line);
  border-bottom: 1px solid var(--blue-line);
}

.page-about .about-timeline__figure {
  margin: clamp(24px, 3vw, 40px) 0 clamp(36px, 5vw, 60px);
}

.page-about .about-timeline__caption {
  display: block;
  margin-top: 10px;
  color: var(--moss);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--about-rail-pad);
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: calc(var(--about-rail-pad) / 2);
  top: 10px;
  bottom: 10px;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg,
    var(--grape) 0%,
    var(--grape-soft) 48%,
    rgba(199, 184, 214, .38) 100%);
  border-radius: 2px;
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(34px, 4.6vw, 62px);
}

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

.page-about .timeline__dot {
  position: absolute;
  left: calc(var(--about-rail-pad) / -2);
  top: 12px;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  transform: translateX(-50%);
  background: var(--gold);
  box-shadow: 0 0 0 4px var(--paper-2), 0 0 0 5px var(--grape-soft);
}

.page-about .timeline__item--now .timeline__dot {
  background: var(--lime);
  box-shadow: 0 0 0 4px var(--paper-2), 0 0 0 5px var(--grape);
}

.page-about .timeline__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
}

.page-about .timeline__year {
  font-family: var(--ff-geo);
  font-weight: 200;
  font-size: clamp(40px, 6.4vw, 76px);
  line-height: .9;
  letter-spacing: -.045em;
  color: var(--grape-deep);
}

.page-about .timeline__phase {
  color: var(--moss);
  border-bottom: 1px solid var(--blue-line);
  padding-bottom: 2px;
}

.page-about .timeline__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 14px;
}

.page-about .timeline__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .timeline__text {
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink);
  margin: 0;
  max-width: 38ch;
}

.page-about .timeline__side-label {
  color: var(--moss);
  margin: 0 0 10px;
}

.page-about .timeline__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tag {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .05em;
  padding: 4px 10px;
  border: 1px solid var(--grape-soft);
  border-radius: 999px;
  color: var(--grape-deep);
  background: rgba(168, 124, 198, .14);
  white-space: nowrap;
}

/* ---------- 十二次调整 ---------- */

.page-about .about-changes {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--paper);
}

.page-about .changes-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .change-card {
  border: 1px solid var(--blue-line);
  border-radius: var(--r-lg);
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--paper-2);
  position: relative;
  overflow: hidden;
}

.page-about .change-card::after {
  content: "";
  position: absolute;
  top: -34px;
  right: -34px;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: rgba(107, 46, 143, .1);
}

.page-about .change-card--b::after {
  background: rgba(181, 227, 42, .3);
}

.page-about .change-card--c::after {
  background: rgba(227, 160, 60, .25);
}

.page-about .change-card--d::after {
  background: rgba(47, 74, 60, .16);
}

.page-about .change-card__tag {
  color: var(--moss);
  margin: 0 0 8px;
}

.page-about .change-card__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.24;
  color: var(--ink);
  margin: 0 0 12px;
}

.page-about .change-card__text {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0 0 14px;
  max-width: 40ch;
}

.page-about .change-card__result {
  color: var(--grape);
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  border-top: 1px dashed var(--blue-line);
  padding-top: 12px;
}

.page-about .tagcloud-wrap {
  margin-top: clamp(32px, 4vw, 52px);
  padding-top: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--blue-line);
}

.page-about .tagcloud__label {
  color: var(--moss);
  margin: 0 0 18px;
}

.page-about .tagcloud {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 12px;
}

.page-about .tagcloud__item {
  font-family: var(--ff-geo);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.2;
  padding: 6px 14px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  transition: border-color .2s ease-out, background-color .2s ease-out;
}

.page-about .tagcloud__item:hover {
  border-color: var(--grape);
  background: rgba(181, 227, 42, .18);
}

.page-about .tagcloud__item--xl {
  font-size: clamp(22px, 3vw, 34px);
  color: var(--grape-deep);
  background: rgba(168, 124, 198, .16);
}

.page-about .tagcloud__item--lg {
  font-size: clamp(18px, 2.3vw, 25px);
  color: var(--grape);
  background: rgba(107, 46, 143, .08);
}

.page-about .tagcloud__item--md {
  font-size: clamp(15px, 1.7vw, 18px);
  color: var(--moss);
  background: rgba(47, 74, 60, .08);
}

.page-about .tagcloud__item--sm {
  font-family: var(--ff-mono);
  font-weight: 400;
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--moss);
  border-color: var(--blue-line);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--paper-2);
  border-top: 1px solid var(--blue-line);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-team__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--ink);
  margin: 10px 0 18px;
}

.page-about .about-team__text {
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink);
  margin: 0 0 14px;
  max-width: 36ch;
}

.page-about .about-team__caption {
  display: block;
  margin-top: 10px;
  color: var(--moss);
}

.page-about .team-roles {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--blue-line);
  border: 1px solid var(--blue-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .team-role {
  background: var(--paper);
  padding: clamp(14px, 2vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .team-role__num {
  font-family: var(--ff-geo);
  font-weight: 300;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--grape);
}

.page-about .team-role__name {
  font-family: var(--ff-geo);
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
}

.page-about .team-role__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--moss);
}

.page-about .team-topics {
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .team-topics__label {
  color: var(--moss);
  margin: 0 0 14px;
}

.page-about .team-topics__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .team-topic {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  border-left: 3px solid var(--grape);
  padding: 8px 0 8px 14px;
}

.page-about .team-topic__name {
  font-family: var(--ff-geo);
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
}

.page-about .team-topic__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--moss);
}

/* ---------- 三条做法 ---------- */

.page-about .about-pledge {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--paper);
}

.page-about .pledge-list {
  list-style: none;
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--blue-line);
  border: 1px solid var(--blue-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .pledge {
  background: var(--paper);
  padding: clamp(20px, 2.8vw, 32px);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 18px;
  align-items: baseline;
}

.page-about .pledge__idx {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold);
  grid-row: span 2;
}

.page-about .pledge__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.24;
  color: var(--ink);
  margin: 0;
}

.page-about .pledge__text {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0;
  max-width: 52ch;
}

/* ---------- 安徽 ---------- */

.page-about .about-anhui {
  padding: clamp(44px, 6vw, 88px) 0;
  background: var(--grape-deep);
  color: var(--paper);
}

.page-about .about-anhui__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-anhui__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: var(--paper);
  margin: 10px 0 18px;
  max-width: 20ch;
}

.page-about .about-anhui .eyebrow {
  color: var(--lime);
}

.page-about .about-anhui__text {
  font-size: 16.5px;
  line-height: 1.78;
  color: rgba(248, 242, 231, .86);
  margin: 0 0 14px;
  max-width: 36ch;
}

.page-about .about-anhui__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-anhui__caption {
  display: block;
  margin-top: 10px;
  color: rgba(248, 242, 231, .68);
}

/* ---------- 结尾 ---------- */

.page-about .about-more {
  padding: clamp(40px, 5vw, 72px) 0 clamp(48px, 7vw, 96px);
  background: var(--paper);
}

.page-about .about-more__panel {
  border: 1px solid var(--grape);
  border-radius: var(--r-lg);
  background:
    radial-gradient(circle at 96% 0%, rgba(181, 227, 42, .3), transparent 44%),
    var(--paper-2);
  padding: clamp(24px, 3.4vw, 44px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-more__title {
  font-family: var(--ff-geo);
  font-weight: 800;
  font-size: clamp(22px, 2.8vw, 32px);
  line-height: 1.15;
  color: var(--ink);
  margin: 0 0 12px;
}

.page-about .about-more__text {
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0;
  max-width: 46ch;
}

.page-about .about-more__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .team-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-more__panel {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 820px) {
  .page-about .timeline__body {
    grid-template-columns: 62fr 30fr;
    column-gap: 8fr;
    align-items: start;
  }

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

  .page-about .change-card--a,
  .page-about .change-card--d {
    margin-top: 0;
  }

  .page-about .change-card--b {
    margin-top: clamp(18px, 3vw, 36px);
  }

  .page-about .change-card--c {
    margin-top: calc(-1 * clamp(10px, 1.6vw, 20px));
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 62fr 30fr;
    column-gap: 8fr;
    align-items: start;
  }

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

  .page-about .about-why__grid {
    grid-template-columns: 62fr 30fr;
    column-gap: 8fr;
  }

  .page-about .about-team__grid {
    grid-template-columns: 38fr 54fr;
    column-gap: 8fr;
  }

  .page-about .about-anhui__grid {
    grid-template-columns: 38fr 54fr;
    column-gap: 8fr;
  }

  .page-about .pledge {
    grid-template-columns: auto 22ch 1fr;
    align-items: baseline;
  }

  .page-about .pledge__idx {
    grid-row: auto;
  }
}

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