.page-about {
  background: var(--c-paper);
  color: var(--tx);
  font-family: var(--f-body);
}

.page-about .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--ln);
  background:
    linear-gradient(180deg, rgba(31, 138, 76, 0.06), transparent 60%),
    var(--c-paper);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -60px;
  width: clamp(180px, 28vw, 340px);
  height: clamp(180px, 28vw, 340px);
  background: linear-gradient(135deg, var(--c-green) 0%, var(--c-green-deep) 100%);
  transform: rotate(-6deg);
  opacity: 0.14;
  pointer-events: none;
}

.page-about .about-hero .crumbs {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--c-green-deep);
  margin: 0 0 clamp(14px, 2vw, 20px);
}

.page-about .about-hero__eyebrow .mono {
  color: var(--c-orange);
  font-weight: 700;
  letter-spacing: 0.18em;
}

.page-about .about-hero__title {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--tx);
  margin: 0 0 clamp(18px, 3vw, 26px);
  max-width: 20ch;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--c-green-deep);
  background-image: linear-gradient(transparent 62%, var(--c-lime) 62%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  padding-right: 0.05em;
}

.page-about .about-hero__lead {
  max-width: 64ch;
  margin: 0 0 clamp(28px, 4vw, 40px);
  color: var(--tx-soft);
}

.page-about .about-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 24px;
  margin: 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px dashed var(--ln-strong);
}

.page-about .about-hero__meta > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  padding-left: 14px;
}

.page-about .about-hero__meta > div::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 6px;
  height: 6px;
  background: var(--c-lime);
  border: 1px solid var(--c-green-deep);
  transform: rotate(45deg);
}

.page-about .about-hero__meta dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--tx-soft);
  margin: 0;
}

.page-about .about-hero__meta dd {
  margin: 0;
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 30px);
  letter-spacing: -0.01em;
  color: var(--tx);
  line-height: 1.1;
}

.page-about .about-hero__meta dd .about-hero__num {
  display: inline-block;
  border-bottom: 3px solid var(--c-orange);
  padding-bottom: 2px;
}

/* ---------- 章节头 ---------- */

.page-about .about-heading {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
  margin-bottom: clamp(18px, 3vw, 28px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--ln);
}

.page-about .about-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 32px;
  padding: 0 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-lime);
  background: var(--c-ink);
  border: 1px solid var(--c-ink);
  transform: skewX(-6deg);
}

.page-about .about-title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--tx);
  margin: 0;
}

.page-about .about-heading--invert {
  border-bottom-color: var(--ln-dark);
}

.page-about .about-heading--invert .about-title {
  color: var(--tx-invert);
}

/* ---------- 正文 ---------- */

.page-about .about-prose {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 18px);
  max-width: 68ch;
}

.page-about .about-prose p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--tx);
}

.page-about .about-quote {
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: clamp(22px, 3vw, 32px) clamp(24px, 3vw, 36px);
  background: var(--c-green);
  color: #FFFFFF;
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  line-height: 1.55;
  border-left: 8px solid var(--c-lime);
  border-radius: 0 6px 6px 0;
  position: relative;
  max-width: 68ch;
  transition: transform 520ms var(--ease), opacity 520ms var(--ease);
}

.page-about .about-quote p {
  margin: 0;
}

.has-js .page-about .about-quote[data-reveal] {
  opacity: 0;
  transform: translateX(-14px);
}

.has-js .page-about .about-quote[data-reveal].is-in {
  opacity: 1;
  transform: translateX(0);
}

/* ---------- 图像 ---------- */

.page-about .about-media {
  display: block;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  position: relative;
  border: 1px solid var(--ln);
  background: var(--c-mist);
  box-shadow: var(--sh-card);
}

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

.page-about .about-media figcaption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--tx-soft);
  background: var(--c-paper);
  border-top: 1px solid var(--ln);
}

/* ---------- 四组人 ---------- */

.page-about .about-cols {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
}

.page-about .about-col {
  background: var(--c-paper);
  border: 1px solid var(--ln);
  border-top: 4px solid var(--c-green);
  padding: clamp(20px, 2.6vw, 26px);
  transition: transform 320ms var(--ease), box-shadow 320ms var(--ease), border-top-color 320ms var(--ease);
}

.page-about .about-col:hover,
.page-about .about-col:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--sh-card);
  border-top-color: var(--c-orange);
}

.page-about .about-col__num {
  display: block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-orange);
  margin-bottom: 12px;
}

.page-about .about-col__title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--tx);
}

.page-about .about-col__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--tx-soft);
}

/* ---------- 节奏 ---------- */

.page-about .about-rhythm {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 36px);
}

.page-about .about-rhythm__text {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 18px);
  max-width: 68ch;
}

.page-about .about-rhythm__text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--tx);
}

.page-about .about-media--flow {
  margin: 0;
  border-color: var(--c-green-deep);
  box-shadow: 0 20px 40px -30px rgba(11, 27, 51, 0.6);
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  border-top: 1px solid var(--ln);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--ln);
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--c-lime);
  transition: width 380ms var(--ease);
}

.page-about .about-timeline__item:hover::before {
  width: 88px;
}

.page-about .about-timeline__year {
  display: inline-block;
  align-self: start;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-orange);
  padding-bottom: 2px;
  border-bottom: 2px solid var(--c-ink);
}

.page-about .about-timeline__record {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--tx);
}

.page-about .about-timeline__record strong {
  color: var(--c-green-deep);
  font-weight: 700;
}

/* ---------- 原则 ---------- */

.page-about .about-principles {
  list-style: none;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  counter-reset: pride;
}

.page-about .about-principles > li {
  counter-increment: pride;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 18px;
  padding: 22px 0;
  border-top: 1px solid var(--ln);
  align-items: start;
}

.page-about .about-principles > li:last-child {
  border-bottom: 1px solid var(--ln);
}

.page-about .about-principles > li::before {
  content: "0" counter(pride);
  font-family: var(--f-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--c-lime);
  background: var(--c-ink);
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transform: skewX(-6deg);
}

.page-about .about-principles h3 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--tx);
}

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

/* ---------- 地域 ---------- */

.page-about .about-map {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 36px);
  align-items: start;
}

.page-about .about-map__text {
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vw, 18px);
  max-width: 66ch;
}

.page-about .about-map__text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.9;
  color: var(--tx-invert);
}

.page-about .about-map__media {
  margin: 0;
  border: 1px solid var(--ln-dark);
  background: var(--c-ink-2);
  box-shadow: 0 24px 44px -30px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}

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

/* ---------- 收束 ---------- */

.page-about .about-closing {
  background: var(--c-green);
  color: #FFFFFF;
  padding: clamp(32px, 5vw, 56px) 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-closing::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 40%, rgba(232, 255, 58, 0.22) 40%, rgba(232, 255, 58, 0.22) 46%, transparent 46%);
  pointer-events: none;
}

.page-about .about-closing__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  align-items: center;
}

.page-about .about-closing__line {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0;
  color: #FFFFFF;
}

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

.page-about .about-closing__actions .btn--cta {
  background: var(--c-ink);
  color: var(--c-lime);
  border-color: var(--c-ink);
}

.page-about .about-closing__actions .btn--ghost {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.55);
}

.page-about .about-closing__actions .btn--line {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.25);
}

/* ---------- 响应式 ---------- */

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

  .page-about .about-timeline__item {
    grid-template-columns: 130px 1fr;
    gap: 28px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-cols {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-col:nth-child(2),
  .page-about .about-col:nth-child(4) {
    transform: translateY(22px);
  }

  .page-about .about-col:nth-child(2):hover,
  .page-about .about-col:nth-child(4):hover,
  .page-about .about-col:nth-child(2):focus-within,
  .page-about .about-col:nth-child(4):focus-within {
    transform: translateY(16px);
  }

  .page-about .about-rhythm {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .page-about .about-rhythm__text {
    order: 1;
  }

  .page-about .about-media--flow {
    order: 2;
    margin-top: 8px;
  }

  .page-about .about-map {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-about .about-closing__inner {
    grid-template-columns: 1fr auto;
    gap: 32px;
  }

  .page-about .about-closing__line {
    max-width: 24ch;
  }
}

@media (min-width: 1100px) {
  .page-about .about-prose,
  .page-about .about-quote,
  .page-about .about-rhythm__text,
  .page-about .about-map__text {
    padding-left: clamp(0px, 3vw, 48px);
  }
}