.page-about {
  --about-index-w: 190px;
  --about-gap: clamp(24px, 5vw, 64px);
  display: block;
  background: var(--abyss-900);
  color: var(--fog-050);
}

.page-about .breadcrumb {
  max-width: var(--page-max);
  margin-inline: auto;
  padding: 18px var(--gutter) 0;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.04em;
  color: var(--fog-400);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 8px;
  color: var(--abyss-600);
}

.page-about .breadcrumb__link {
  color: var(--fog-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--coral-300);
  border-bottom-color: var(--coral-300);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(36px, 6vw, 76px) clamp(44px, 7vw, 92px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 6vw, 68px);
  align-items: center;
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

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

.page-about .about-hero__copy .eyebrow {
  display: block;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mint-400);
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-size: var(--fs-900);
  font-weight: 700;
  line-height: 1.07;
  letter-spacing: -0.02em;
  color: var(--fog-050);
}

.page-about .about-hero .lede {
  margin: 0 0 30px;
  max-width: 32em;
  font-size: var(--fs-500);
  line-height: 1.68;
  color: var(--fog-200);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0 0 34px;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: var(--fs-300);
  color: var(--fog-200);
}

.page-about .about-hero__k {
  flex: 0 0 auto;
  min-width: 5.2em;
  font-family: var(--font-mono);
  font-size: var(--fs-400);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--coral-500);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero__figure {
  margin: 0;
  padding: 14px;
  background: linear-gradient(150deg, var(--abyss-800) 0%, var(--abyss-700) 100%);
  clip-path: polygon(0 0, calc(100% - 46px) 0, 100% 46px, 100% 100%, 0 100%);
}

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

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: flex;
  flex-direction: column;
  gap: clamp(36px, 6vw, 60px);
  padding-bottom: clamp(56px, 9vw, 110px);
}

@media (min-width: 1040px) {
  .page-about .about-shell {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--about-gap);
  }
}

.page-about .about-index {
  min-width: 0;
  border-top: 1px solid var(--line-soft);
  padding-top: 16px;
}

@media (min-width: 1040px) {
  .page-about .about-index {
    flex: 0 0 var(--about-index-w);
    position: sticky;
    top: calc(var(--header-h) + 32px);
    border-top: 0;
    border-left: 1px solid var(--line-soft);
    padding: 4px 0 0 20px;
  }
}

.page-about .about-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog-400);
}

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

@media (max-width: 1039px) {
  .page-about .about-index__list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
  }

  .page-about .about-index__list > li {
    flex: 0 0 auto;
  }
}

@media (min-width: 1040px) {
  .page-about .about-index__list {
    display: grid;
    gap: 2px;
  }
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px;
  border-left: 2px solid transparent;
  font-size: var(--fs-200);
  line-height: 1.5;
  color: var(--fog-400);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__link .index-list__num {
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.08em;
  color: var(--coral-500);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--fog-050);
  background: rgba(18, 58, 87, 0.62);
  border-left-color: var(--coral-500);
}

.page-about .about-flow {
  display: grid;
  gap: clamp(46px, 7vw, 88px);
  min-width: 0;
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  position: relative;
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-about .about-sec .eyebrow {
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fog-400);
}

.page-about .about-sec h2 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 600;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--fog-050);
}

.page-about .about-sec__intro {
  margin: 0 0 26px;
  max-width: 52ch;
  font-size: var(--fs-400);
  line-height: 1.75;
  color: var(--fog-200);
}

.page-about .about-sec__foot {
  margin: 26px 0 0;
  max-width: 52ch;
  font-size: var(--fs-200);
  line-height: 1.75;
  color: var(--fog-400);
}

.page-about .about-link {
  color: var(--coral-300);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 158, 128, 0.45);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

/* ---------- 01 自述 ---------- */
.page-about .about-sec--light {
  background: var(--fog-050);
  color: var(--ink-900);
  padding: clamp(26px, 4.6vw, 46px) clamp(20px, 3.6vw, 44px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-sec--light .eyebrow {
  color: var(--mint-700);
}

.page-about .about-sec--light h2 {
  color: var(--ink-900);
}

.page-about .about-prose {
  display: grid;
  gap: 16px;
  max-width: 62ch;
}

.page-about .about-prose p {
  margin: 0;
  font-size: var(--fs-400);
  line-height: 1.78;
  color: #1c3245;
}

.page-about .about-sec--light .about-prose b {
  font-family: var(--font-mono);
  font-size: 1.04em;
  font-weight: 600;
  color: var(--mint-700);
}

/* ---------- 02 历程 ---------- */
.page-about .about-journey__figure {
  margin: 0 0 32px;
  background: var(--abyss-800);
  border: 1px solid var(--line-soft);
}

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

.page-about .about-timeline {
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 14px;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline:focus-visible {
  outline: 2px solid var(--coral-500);
  outline-offset: 6px;
}

.page-about .about-timeline__list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(220px, 258px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 42px 26px 24px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-timeline__node {
  position: absolute;
  top: -5px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--abyss-900);
  border: 2px solid var(--mint-400);
  box-sizing: border-box;
}

.page-about .about-timeline__item.is-now .about-timeline__node {
  background: var(--coral-500);
  border-color: var(--coral-500);
  box-shadow: 0 0 0 5px rgba(255, 107, 74, 0.18);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-700);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--fog-400);
}

.page-about .about-timeline__item.is-now .about-timeline__year {
  color: var(--coral-500);
}

.page-about .about-timeline__label {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--fs-500);
  font-weight: 600;
  line-height: 1.32;
  color: var(--fog-050);
}

.page-about .about-timeline__meta {
  margin: 0;
  font-size: var(--fs-200);
  line-height: 1.75;
  color: var(--fog-400);
  transition: color 0.2s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__meta,
.page-about .about-timeline__item:focus-within .about-timeline__meta {
  color: var(--fog-200);
}

/* ---------- 03 团队 ---------- */
.page-about .about-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
  max-width: 640px;
}

.page-about .about-bars__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.page-about .about-bars__name {
  font-size: var(--fs-300);
  font-weight: 600;
  color: var(--fog-050);
}

.page-about .about-bars__count {
  font-family: var(--font-mono);
  font-size: var(--fs-500);
  letter-spacing: 0.02em;
  color: var(--coral-500);
}

.page-about .about-bars__track {
  display: block;
  height: 8px;
  background: var(--abyss-800);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-bars__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--mint-400) 0%, var(--coral-500) 100%);
}

.page-about .about-bars__row:nth-child(1) .about-bars__fill {
  width: 100%;
}

.page-about .about-bars__row:nth-child(2) .about-bars__fill {
  width: 84%;
}

.page-about .about-bars__row:nth-child(3) .about-bars__fill {
  width: 75%;
}

.page-about .about-bars__note {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: var(--fs-200);
  line-height: 1.72;
  color: var(--fog-400);
  transition: color 0.2s var(--ease);
}

.page-about .about-bars__row:hover .about-bars__note {
  color: var(--fog-200);
}

.page-about .about-bars__row:hover .about-bars__fill {
  filter: brightness(1.14);
}

/* ---------- 04 进入路径 ---------- */
.page-about .about-entry__figure {
  margin: 0 0 28px;
  background: var(--abyss-800);
  border: 1px solid var(--line-soft);
}

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

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

@media (min-width: 760px) {
  .page-about .about-entry__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-entry__card {
  padding: 22px 24px 26px;
  background: var(--abyss-800);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .about-entry__card--mint {
  background: linear-gradient(160deg, rgba(18, 112, 94, 0.34) 0%, var(--abyss-800) 62%);
}

.page-about .about-entry__tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.08em;
  color: var(--coral-300);
  border: 1px solid rgba(255, 158, 128, 0.5);
}

.page-about .about-entry__tag--mint {
  color: var(--mint-400);
  border-color: rgba(69, 214, 176, 0.55);
}

.page-about .about-entry__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: var(--fs-500);
  font-weight: 600;
  line-height: 1.32;
  color: var(--fog-050);
}

.page-about .about-entry__card p {
  margin: 0;
  font-size: var(--fs-200);
  line-height: 1.78;
  color: var(--fog-200);
}

/* ---------- 05 规模 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stats__item {
  background: var(--abyss-900);
  padding: 24px 22px 26px;
}

.page-about .about-stats__num {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(30px, 4.2vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--coral-500);
}

.page-about .about-stats__num span {
  margin-left: 3px;
  font-size: 0.46em;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--fog-200);
}

.page-about .about-stats__label {
  margin: 0;
  font-size: var(--fs-200);
  line-height: 1.72;
  color: var(--fog-200);
}

/* ---------- 06 合规 ---------- */
.page-about .about-compliance dl {
  margin: 0 0 26px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

@media (min-width: 640px) {
  .page-about .about-compliance dl {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-compliance dl > div {
  background: var(--abyss-900);
  padding: 16px 18px 18px;
}

.page-about .about-compliance dt {
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-100);
  letter-spacing: 0.12em;
  color: var(--fog-400);
}

.page-about .about-compliance dd {
  margin: 0;
  font-size: var(--fs-300);
  line-height: 1.6;
  color: var(--fog-050);
}

.page-about .about-compliance__note {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: var(--fs-300);
  line-height: 1.78;
  color: var(--fog-200);
}

.page-about .about-compliance__links {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-200);
  color: var(--fog-400);
}

/* ---------- 滚动显现（渐进增强） ---------- */
.page-about .js-ready .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

.page-about .js-ready .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .js-ready .reveal,
  .page-about .js-ready .reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-index__link,
  .page-about .about-bars__fill,
  .page-about .about-bars__note,
  .page-about .about-timeline__meta {
    transition: none;
  }
}
</main>