.page-about {
  --about-rule: rgba(69, 224, 190, .22);
  --about-rule-dark: rgba(11, 36, 31, .14);
  --about-band: rgba(69, 224, 190, .06);
}

/* ---------- 页头 ---------- */
.page-about .about-hero {
  padding-top: clamp(28px, 4vw, 56px);
  padding-bottom: 0;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: end;
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-hero__title {
  margin: 14px 0 20px;
  font-weight: 200;
  letter-spacing: -.02em;
  line-height: 1.02;
}

.page-about .lede {
  max-width: 46ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-figure {
  background: var(--ink);
  padding: 20px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-figure .stat__num {
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  font-weight: 300;
}

.page-about .about-figure__unit {
  font-size: .5em;
  margin-left: 2px;
  color: var(--acid-mist);
}

.page-about .about-figure .stat__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--acid-mist);
}

/* ---------- 横向主题带 ---------- */
.page-about .about-band {
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
  background: var(--about-band);
  padding: 12px 0;
}

.page-about .about-band .band__item {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--acid-mist);
  white-space: nowrap;
}

/* ---------- 左索引 + 右正文 骨架 ---------- */
.page-about .about-rail {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
}

.page-about .about-index {
  display: none;
}

.page-about .about-index__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--stone);
  margin: 0;
}

.page-about .about-column {
  min-width: 0;
}

.page-about .about-column__note {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--stone);
  max-width: 22ch;
  margin: 0;
}

.page-about .about-section-title {
  margin: 10px 0 0;
  font-weight: 200;
  line-height: 1.06;
}

.page-about .about-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  color: var(--acid);
  text-decoration: none;
  border-bottom: 1px solid var(--about-rule);
  padding-bottom: 3px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--acid-mist);
  border-bottom-color: var(--acid-mist);
}

/* ---------- 标签切换 ---------- */
.page-about .about-tabs {
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-tabs__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--about-rule);
  padding-bottom: 14px;
}

.page-about .about-tab {
  appearance: none;
  border: 1px solid var(--about-rule);
  background: transparent;
  color: var(--acid-mist);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .06em;
  padding: 9px 16px;
  border-radius: var(--pill);
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.page-about .about-tab:hover,
.page-about .about-tab:focus-visible {
  border-color: var(--acid);
  color: var(--white);
}

.page-about .about-tab.is-active,
.page-about .about-tab[aria-selected="true"] {
  background: var(--acid);
  border-color: var(--acid);
  color: var(--ink);
  font-weight: 600;
}

.page-about .about-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 40px);
  padding-top: clamp(22px, 3vw, 34px);
}

.page-about .about-panel__title {
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--white);
}

.page-about .about-panel__text p {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(243, 239, 228, .82);
  margin: 0;
}

.page-about .about-dl {
  margin: 20px 0 0;
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-dl > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  background: var(--ink);
  padding: 11px 14px;
}

.page-about .about-dl dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--stone);
  white-space: nowrap;
}

.page-about .about-dl dd {
  margin: 0;
  font-size: 14px;
  color: var(--cream);
  text-align: right;
}

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

/* ---------- 满幅断章图 ---------- */
.page-about .about-break {
  margin: clamp(48px, 7vw, 96px) 0;
  padding: 0 clamp(20px, 4vw, 40px);
}

.page-about .about-break__frame {
  max-width: var(--shell);
  margin: 0 auto;
  border-radius: var(--r-lg);
  overflow: hidden;
  position: relative;
}

.page-about .about-break__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 23, 19, .12), rgba(7, 23, 19, .62));
  pointer-events: none;
}

.page-about .about-break__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.9) contrast(1.04);
}

.page-about .about-break--moss .about-break__frame::after {
  background: linear-gradient(180deg, rgba(79, 122, 94, .18), rgba(7, 23, 19, .68));
}

/* ---------- 生产流程 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  background: var(--ink-deep);
  padding: 20px 18px;
  align-items: start;
}

.page-about .about-step__no {
  font-size: 22px;
  font-weight: 300;
  color: var(--stand);
  letter-spacing: .02em;
  line-height: 1;
  padding-top: 3px;
}

.page-about .about-step__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(243, 239, 228, .76);
}

.page-about .about-flow__note {
  margin-top: clamp(22px, 3vw, 32px);
  border-left: 3px solid var(--ref);
  padding-left: 18px;
}

.page-about .about-flow__note p:last-child {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 239, 228, .8);
  max-width: 52ch;
}

.page-about .eyebrow--warm {
  color: var(--ref);
}

/* ---------- 团队与城市 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-team__chart {
  display: grid;
  gap: 12px;
}

.page-about .about-team__bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--pill);
  background: rgba(11, 36, 31, .07);
  overflow: hidden;
}

.page-about .about-team__bar::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--w);
  background: linear-gradient(90deg, rgba(69, 224, 190, .34), rgba(69, 224, 190, .08));
  border-radius: var(--pill);
}

.page-about .about-team__role {
  position: relative;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--ink);
}

.page-about .about-team__count {
  position: relative;
  font-size: 18px;
  font-weight: 600;
  color: var(--ink-deep);
}

.page-about .about-team__copy p {
  font-size: 16px;
  line-height: 1.82;
  color: rgba(11, 36, 31, .78);
  margin: 0 0 16px;
}

.page-about .about-team__copy .about-link {
  color: var(--ink);
  border-bottom-color: var(--about-rule-dark);
}

.page-about .about-team__copy .about-link:hover,
.page-about .about-team__copy .about-link:focus-visible {
  color: var(--moss);
  border-bottom-color: var(--moss);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0 0 0 26px;
  position: relative;
  display: grid;
  gap: clamp(24px, 3vw, 36px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--acid), rgba(69, 224, 190, .1));
}

.page-about .about-node {
  position: relative;
}

.page-about .about-node__dot {
  position: absolute;
  left: -26px;
  top: 9px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--acid);
  box-shadow: 0 0 0 4px rgba(69, 224, 190, .12);
}

.page-about .about-node__stage {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--stand);
}

.page-about .about-node__title {
  margin: 8px 0 10px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 600;
  color: var(--white);
}

.page-about .about-node p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(243, 239, 228, .76);
  max-width: 56ch;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-partner {
  border: 1px solid rgba(69, 224, 190, .28);
}

.page-about .about-partner .card__meta {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ref);
  margin: 0 0 10px;
}

.page-about .about-partner .card__title {
  font-size: 18px;
  line-height: 1.4;
}

.page-about .about-partner .card__body {
  font-size: 14px;
  line-height: 1.78;
  color: rgba(243, 239, 228, .78);
}

.page-about .about-partner__cta {
  margin-top: clamp(26px, 3.5vw, 40px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-partner__cta p {
  margin: 0;
  font-size: 15px;
  color: rgba(243, 239, 228, .84);
  max-width: 44ch;
}

/* ---------- 长期使用 ---------- */
.page-about .about-steady {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-steady__intro .prose {
  margin-top: 16px;
  max-width: 52ch;
}

.page-about .about-steady__points {
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .about-point {
  border-top: 1px solid var(--about-rule);
  padding-top: 18px;
}

.page-about .about-point__no {
  margin: 0;
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--clay);
}

.page-about .about-point__title {
  margin: 10px 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-point p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(243, 239, 228, .76);
}

.page-about .about-steady__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  padding: clamp(22px, 3vw, 30px);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(69, 224, 190, .12), rgba(240, 118, 43, .08));
}

.page-about .about-steady__cta p {
  margin: 0;
  font-size: 15px;
  color: var(--cream);
  max-width: 42ch;
}

.page-about .about-steady__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 交互与可见性 ---------- */
.page-about .tabs__panel[hidden] {
  display: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-panel {
    grid-template-columns: 1.05fr .95fr;
    align-items: start;
  }

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

  .page-about .about-step {
    grid-template-columns: 72px 1fr;
    padding: 24px 22px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.15fr .85fr;
  }

  .page-about .about-rail {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    display: block;
    position: sticky;
    top: 120px;
  }

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

  .page-about .about-index__link {
    display: flex;
    gap: 10px;
    align-items: baseline;
    font-size: 13px;
    letter-spacing: .04em;
    color: var(--stone);
    text-decoration: none;
    border-left: 2px solid transparent;
    padding-left: 10px;
    transition: color .2s ease, border-color .2s ease;
  }

  .page-about .about-index__link .mono-num {
    font-size: 11px;
    letter-spacing: .12em;
    color: var(--stand);
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    color: var(--acid-mist);
    border-left-color: var(--acid);
  }

  .page-about .section--cream .about-index__link:hover,
  .page-about .section--cream .about-index__link:focus-visible {
    color: var(--ink);
    border-left-color: var(--moss);
  }

  .page-about .section--cream .about-index__label {
    color: var(--moss);
  }

  .page-about .about-steady {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-steady__intro {
    position: sticky;
    top: 130px;
  }

  .page-about .about-break {
    margin: clamp(72px, 9vw, 132px) 0;
  }
}

@media (min-width: 1280px) {
  .page-about .about-rail {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(48px, 5vw, 88px);
  }

  .page-about .about-hero__figures {
    gap: 1px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tab,
  .page-about .about-link,
  .page-about .about-index__link {
    transition: none;
  }
}

.page-about {
  --w: 1rem;
}