.page-about {
  --about-num: clamp(40px, 7vw, 64px);
  background: var(--ivory);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 8vw, 88px) 0 clamp(56px, 9vw, 112px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(52vw, 540px);
  height: min(52vw, 540px);
  background: var(--moss-tint);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

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

.page-about .about-hero__title {
  margin: 12px 0 20px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(34px, 5.4vw, 68px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .about-hero__lead {
  margin: 0;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  max-width: 46ch;
  color: var(--ink);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 20px 0 0;
  border-top: var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--sage);
}

.page-about .about-hero__facts .mono {
  font-family: var(--f-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-green);
  letter-spacing: 0.02em;
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
}

.page-about .about-hero__figure .media {
  background: var(--moss-tint);
  border: var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-hero__caption {
  display: block;
  margin-top: 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sage);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }
}

/* ---------- 章节基本 ---------- */

.page-about .section {
  position: relative;
  padding: clamp(56px, 8vw, 96px) 0;
}

.page-about .section > .wrap > .section__head {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .section__head h2 {
  margin: 10px 0 16px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .section__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--sage);
}

.page-about .eyebrow {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--vermilion-deep);
}

/* ---------- 为什么改 ---------- */

.page-about .about-why__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-why__story p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 62ch;
}

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

.page-about .about-why__rule {
  position: relative;
  padding: 28px 24px 28px 28px;
  background: var(--ink-green);
  color: var(--ivory);
  border-left: 6px solid var(--vermilion);
  box-shadow: var(--shadow-hard);
}

.page-about .about-why__rule-label {
  margin: 0 0 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-why__rule-text {
  margin: 0;
  font-family: var(--f-display);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ivory);
}

@media (min-width: 900px) {
  .page-about .about-why__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  background: var(--paper);
  border-top: var(--line-soft);
  border-bottom: var(--line-soft);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 17px;
  width: 2px;
  background: var(--ink-green);
  opacity: 0.18;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 32px 56px;
}

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

.page-about .tl__node {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--jade);
  border: var(--line);
  box-shadow: var(--shadow-small);
  text-decoration: none;
  color: var(--paper);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .tl__node:hover,
.page-about .tl__node:focus-visible {
  transform: translate(-1px, -1px);
  box-shadow: 6px 6px 0 var(--ink-green);
}

.page-about .tl__item--now .tl__node {
  background: var(--vermilion);
}

.page-about .tl__ver {
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

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

.page-about .tl__stage {
  margin: 0 0 6px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .tl__title {
  margin: 0 0 8px;
  font-family: var(--f-display);
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--ink-green);
}

.page-about .tl__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 62ch;
}

@media (min-width: 900px) {
  .page-about .tl::before {
    left: 27px;
  }

  .page-about .tl__item {
    padding-left: 88px;
    padding-bottom: 48px;
  }

  .page-about .tl__node {
    width: 56px;
    height: 56px;
    top: -6px;
  }

  .page-about .tl__ver {
    font-size: 15px;
  }

  .page-about .tl__stage {
    font-size: 13px;
  }
}

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

  .page-about .tl__node:hover,
  .page-about .tl__node:focus-visible {
    transform: none;
    box-shadow: var(--shadow-small);
  }
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-team__card {
  padding: 24px;
  background: var(--paper);
  border: var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .about-team__card--qa {
  background: var(--moss-tint);
}

.page-about .about-team__card--support {
  background: var(--blush);
}

.page-about .about-team__count {
  margin: 0 0 6px;
  font-family: var(--f-mono);
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-family: var(--f-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--ink-green);
}

.page-about .about-team__card > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-team__card ul {
  list-style: none;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: var(--line-soft);
}

.page-about .about-team__card li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage);
}

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

.page-about .about-team__card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--gold);
}

@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .page-about .about-team__card--editor {
    grid-column: span 3;
  }

  .page-about .about-team__card--qa {
    grid-column: span 3;
  }

  .page-about .about-team__card--support {
    grid-column: span 6;
  }
}

@media (min-width: 1024px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
  }

  .page-about .about-team__card--editor {
    grid-column: span 5;
  }

  .page-about .about-team__card--qa {
    grid-column: span 4;
  }

  .page-about .about-team__card--support {
    grid-column: span 3;
  }
}

/* ---------- 五步流程 ---------- */

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

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

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

.page-about .steps > li {
  padding: 18px 0;
  border-top: var(--line-soft);
}

.page-about .steps > li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .steps__num {
  display: block;
  margin-bottom: 4px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--vermilion-deep);
}

.page-about .steps h3 {
  margin: 0 0 6px;
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--ink-green);
}

.page-about .steps > li p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  max-width: 56ch;
}

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

.page-about .about-process__figure .media {
  background: var(--moss-tint);
  border: var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-process__caption {
  display: block;
  margin-top: 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sage);
}

@media (min-width: 900px) {
  .page-about .about-process__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 云南 ---------- */

.page-about .about-yunnan {
  background: var(--moss-tint);
}

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

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

.page-about .about-yunnan__text h2 {
  margin: 10px 0 18px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .about-yunnan__text p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  max-width: 60ch;
}

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

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

.page-about .about-yunnan__figure .media {
  background: var(--paper);
  border: var(--line);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-yunnan__caption {
  display: block;
  margin-top: 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ink-green);
}

@media (min-width: 900px) {
  .page-about .about-yunnan__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: center;
  }
}

/* ---------- 数字 ---------- */

.page-about .about-numbers {
  background: var(--ink-green);
  color: var(--ivory);
}

.page-about .about-numbers .section__head h2 {
  color: var(--ivory);
}

.page-about .about-numbers .eyebrow {
  color: var(--gold);
}

.page-about .about-numbers__grid {
  display: grid;
  gap: 0;
  margin: 8px 0 32px;
  border-top: 1px solid rgba(243, 238, 224, 0.2);
  border-bottom: 1px solid rgba(243, 238, 224, 0.2);
}

.page-about .about-numbers__big {
  padding: 24px 0;
  border-top: 1px solid rgba(243, 238, 224, 0.18);
}

.page-about .about-numbers__big:first-child {
  border-top: 0;
}

.page-about .about-numbers__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 0;
  font-family: var(--f-mono);
  font-size: var(--about-num);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ivory);
}

.page-about .about-numbers__unit {
  font-size: 0.55em;
  color: var(--gold);
}

.page-about .about-numbers__label {
  margin: 10px 0 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--ivory);
}

.page-about .about-numbers__note {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(243, 238, 224, 0.7);
}

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

.page-about .about-numbers__list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(243, 238, 224, 0.9);
}

.page-about .about-numbers__list .mono {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold);
  min-width: 26px;
}

.page-about .about-numbers__foot {
  margin: 28px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(243, 238, 224, 0.18);
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(243, 238, 224, 0.82);
}

.page-about .about-numbers__foot a {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-numbers__foot a:hover,
.page-about .about-numbers__foot a:focus-visible {
  color: var(--ivory);
}

@media (min-width: 720px) {
  .page-about .about-numbers__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-numbers__big {
    padding: 36px 24px;
    border-top: 0;
    border-left: 1px solid rgba(243, 238, 224, 0.18);
  }

  .page-about .about-numbers__big:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-about .about-numbers__big:last-child {
    padding-right: 0;
  }

  .page-about .about-numbers__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px 32px;
  }
}

/* ---------- 下一步 ---------- */

.page-about .about-next {
  padding: clamp(56px, 8vw, 96px) 0;
  background: var(--ivory);
  border-top: var(--line);
}

.page-about .about-next__inner {
  display: grid;
  gap: 24px;
}

.page-about .about-next h2 {
  margin: 8px 0 12px;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink-green);
}

.page-about .about-next p {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--sage);
  max-width: 56ch;
}

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

@media (min-width: 720px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(24px, 5vw, 56px);
  }
}