.page-about {
  --about-gap: clamp(56px, 8vw, 112px);
  --about-radius: var(--pl-r-l);
  --about-ink-soft: rgba(18, 25, 23, .72);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 28px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 32px 0 clamp(48px, 7vw, 88px);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(217, 164, 65, .16), transparent 58%),
    linear-gradient(180deg, var(--pl-paper) 0%, rgba(216, 235, 225, .5) 100%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.14;
  font-weight: 900;
  color: var(--pl-green-900);
  letter-spacing: -.01em;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 38em;
  font-size: 17px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

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

.page-about .about-hero__panel {
  position: relative;
  padding: 26px 22px;
  border: 1px solid var(--pl-line);
  border-radius: var(--about-radius);
  background: #fff;
  box-shadow: var(--pl-shadow-card);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 22px;
  width: 78px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: var(--pl-gold-500);
}

.page-about .about-hero__panel-title {
  margin: 0 0 18px;
  font-size: 13px;
  letter-spacing: .1em;
  font-weight: 700;
  color: var(--pl-green-500);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 14px;
  margin: 0;
}

.page-about .about-stats__item {
  border-left: 2px solid var(--pl-green-100);
  padding-left: 12px;
}

.page-about .about-stats dt {
  font-size: 13px;
  color: var(--about-ink-soft);
}

.page-about .about-stats dd {
  margin: 4px 0 0;
  display: flex;
  align-items: baseline;
  gap: 3px;
  color: var(--pl-green-900);
}

.page-about .about-stats__num {
  font-family: var(--pl-font-num);
  font-size: clamp(30px, 7vw, 40px);
  font-weight: 700;
  line-height: 1;
}

.page-about .about-stats__unit {
  font-size: 14px;
  color: var(--pl-green-500);
}

.page-about .about-hero__panel-note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--pl-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

/* ---------- 章节速览条 ---------- */
.page-about .about-map {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: 10px 0;
  background: rgba(246, 248, 245, .86);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--pl-line-soft);
}

.page-about .about-map__inner {
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-map__inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-map__list {
  flex-wrap: nowrap;
  white-space: nowrap;
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  padding: var(--about-gap) 0 0;
}

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

.page-about .about-sec__head .pl-title {
  margin-top: 8px;
}

.page-about .about-sec__lede {
  margin-top: 16px;
  max-width: 46em;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 32px;
}

.page-about .about-origin__text p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

.page-about .about-origin__text .pl-lede {
  color: var(--pl-ink);
}

.page-about .about-origin__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-origin__tag {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--pl-green-100);
  color: var(--pl-green-700);
  font-size: 13px;
  font-weight: 500;
}

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

/* ---------- 02 里程碑 ---------- */
.page-about .about-milestone-cover {
  margin: 0 0 clamp(32px, 5vw, 56px);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 4px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 13px;
  width: 2px;
  background: linear-gradient(180deg, var(--pl-green-300), var(--pl-gold-200));
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 0 16px;
  padding-bottom: 34px;
}

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

.page-about .about-timeline__dot {
  grid-column: 1;
  grid-row: 1;
  width: 14px;
  height: 14px;
  margin: 6px 0 0 7px;
  border-radius: 50%;
  background: var(--pl-paper);
  border: 3px solid var(--pl-green-500);
  transition: transform .3s var(--pl-ease), border-color .3s var(--pl-ease);
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  transform: scale(1.3);
  border-color: var(--pl-coral);
}

.page-about .about-timeline__item--now .about-timeline__dot {
  border-color: var(--pl-gold-500);
  background: var(--pl-gold-200);
}

.page-about .about-timeline__year {
  grid-column: 2;
  font-family: var(--pl-font-num);
  font-size: clamp(26px, 7vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: rgba(217, 164, 65, .9);
  letter-spacing: .02em;
}

.page-about .about-timeline__body {
  grid-column: 2;
  margin-top: 8px;
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--pl-green-900);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink-soft);
  max-width: 42em;
}

/* ---------- 03 团队 ---------- */
.page-about .about-sec--team {
  position: relative;
}

.page-about .about-team {
  display: grid;
  gap: 36px;
}

.page-about .about-team__bars {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 22px;
}

.page-about .about-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.page-about .about-bar__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--pl-green-900);
}

.page-about .about-bar__count {
  font-family: var(--pl-font-num);
  font-size: 20px;
  font-weight: 700;
  color: var(--pl-green-500);
}

.page-about .about-bar__track {
  position: relative;
  height: 10px;
  border-radius: 999px;
  background: rgba(18, 63, 50, .08);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pl-green-500), var(--pl-green-300));
  transition: width .8s var(--pl-ease);
}

.page-about .about-bar:nth-child(1) .about-bar__fill { width: 34.6%; }
.page-about .about-bar:nth-child(2) .about-bar__fill { width: 26.9%; }
.page-about .about-bar:nth-child(3) .about-bar__fill { width: 23.1%; }
.page-about .about-bar:nth-child(4) .about-bar__fill { width: 15.4%; background: linear-gradient(90deg, var(--pl-gold-500), var(--pl-gold-200)); }

.page-about .about-bar__desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

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

.page-about .about-team__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

/* ---------- 04 节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: 28px;
}

.page-about .about-cadence__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  counter-reset: cadence;
  border-left: 2px solid var(--pl-green-100);
}

.page-about .about-cadence__step {
  position: relative;
  padding: 0 0 28px 22px;
}

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

.page-about .about-cadence__num {
  position: absolute;
  left: -17px;
  top: -4px;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--pl-gold-200);
  color: var(--pl-green-900);
  font-family: var(--pl-font-num);
  font-size: 14px;
  font-weight: 700;
}

.page-about .about-cadence__step h3 {
  margin: 2px 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--pl-green-900);
}

.page-about .about-cadence__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-cadence__side {
  padding: 24px 22px;
  border-radius: var(--about-radius);
  background: var(--pl-green-900);
  color: var(--pl-paper);
}

.page-about .about-cadence__side-title {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--pl-gold-200);
}

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

.page-about .about-cadence__list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--pl-line-invert);
}

.page-about .about-cadence__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-cadence__key {
  font-size: 14px;
  color: rgba(246, 248, 245, .74);
}

.page-about .about-cadence__val {
  font-family: var(--pl-font-num);
  font-size: 18px;
  font-weight: 700;
  color: var(--pl-gold-200);
}

.page-about .about-cadence__link {
  margin-top: 20px;
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-sec--eco {
  background: linear-gradient(180deg, transparent, rgba(216, 235, 225, .45) 30%, transparent);
}

.page-about .about-eco {
  display: grid;
  gap: 32px;
}

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

.page-about .about-eco__figure {
  padding: 24px 22px;
  border-radius: var(--about-radius);
  background: #fff;
  border: 1px solid var(--pl-line);
}

.page-about .about-eco__big {
  display: block;
  font-family: var(--pl-font-num);
  font-size: clamp(46px, 13vw, 68px);
  font-weight: 700;
  line-height: 1;
  color: var(--pl-green-500);
}

.page-about .about-eco__label {
  margin: 6px 0 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--pl-green-900);
}

.page-about .about-eco__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .about-eco__ways-title {
  margin: 0 0 16px;
  font-size: 18px;
  font-weight: 700;
  color: var(--pl-green-900);
}

.page-about .about-eco__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.page-about .about-eco__list li {
  padding: 18px 16px;
  border-radius: var(--pl-r-m);
  background: rgba(255, 255, 255, .82);
  border: 1px solid var(--pl-line-soft);
  transition: transform .3s var(--pl-ease), border-color .3s var(--pl-ease);
}

.page-about .about-eco__list li:hover {
  transform: translateY(-3px);
  border-color: var(--pl-green-300);
}

.page-about .about-eco__list h4 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--pl-green-700);
}

.page-about .about-eco__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .about-eco__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--pl-gold-500);
  background: rgba(241, 220, 169, .28);
  border-radius: 0 var(--pl-r-s) var(--pl-r-s) 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--pl-green-900);
}

.page-about .about-eco__ways .pl-btn {
  margin-top: 20px;
}

/* ---------- 06 承诺 ---------- */
.page-about .about-sec--promise {
  padding-bottom: clamp(64px, 9vw, 120px);
}

.page-about .about-promise {
  display: grid;
  gap: 26px;
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--pl-r-xl);
  background: var(--pl-green-900);
  color: var(--pl-paper);
}

.page-about .about-promise .pl-contact__key {
  color: rgba(246, 248, 245, .7);
}

.page-about .about-promise .pl-contact__value {
  color: var(--pl-paper);
  font-size: 16px;
  word-break: break-all;
}

.page-about .about-promise .pl-contact__item {
  border-color: var(--pl-line-invert);
}

.page-about .about-promise__lead {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--pl-gold-200);
}

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

.page-about .about-promise__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(246, 248, 245, .86);
}

.page-about .about-promise__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--pl-coral);
  transform: rotate(45deg);
}

.page-about .about-promise__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-cadence__steps {
    padding-left: 8px;
  }

  .page-about .about-promise {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
    align-items: start;
    gap: 34px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 48px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-hero__panel {
    margin-top: 12px;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-cadence {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .9fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.4fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .about-timeline {
    padding-left: 0;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 132px 28px minmax(0, 1fr);
    gap: 0 20px;
  }

  .page-about .about-timeline__dot {
    grid-column: 2;
    margin-left: 7px;
  }

  .page-about .about-timeline__year {
    grid-column: 1;
    text-align: right;
    grid-row: 1;
    font-size: 34px;
  }

  .page-about .about-timeline__body {
    grid-column: 3;
    margin-top: 0;
  }

  .page-about .about-timeline::before {
    left: 141px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-bar__fill,
  .page-about .about-timeline__dot,
  .page-about .about-eco__list li {
    transition: none;
  }
}
</main>