.page-about {
  --about-line: rgba(31, 122, 106, .18);
  --about-pad: clamp(56px, 8vw, 108px);
  position: relative;
  color: var(--ink);
  padding-bottom: clamp(24px, 4vw, 48px);
  background:
    radial-gradient(900px 520px at 94% -8%, rgba(207, 224, 220, .62), transparent 68%),
    radial-gradient(720px 420px at -10% 34%, rgba(247, 214, 208, .38), transparent 72%),
    linear-gradient(180deg, var(--mist) 0%, #ffffff 46%, var(--mist) 100%);
}

.page-about .about-head { padding-top: 22px; }

.page-about .crumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-green);
}

.page-about .crumbs__link {
  color: var(--jade);
  text-decoration: none;
  font-weight: 600;
}

.page-about .crumbs__link:hover { color: var(--red); }

.page-about .crumbs__sep { opacity: .5; }

/* ---------- hero ---------- */

.page-about .about-hero { padding-top: 20px; }

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  align-items: end;
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--haze), var(--coral));
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.page-about .about-hero__eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--mist-2);
  color: var(--jade);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
}

.page-about .about-hero__copy h1 {
  margin: 0;
  font-size: clamp(30px, 5.2vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink-jade);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.88;
  color: var(--ink-jade);
}

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

.page-about .about-stats {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stats__item {
  padding: 18px 20px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .8);
}

.page-about .about-stats__num {
  display: block;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--jade);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--gray-green);
}

/* ---------- jump nav ---------- */

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 36px;
}

.page-about .about-jump__link {
  flex: 0 0 auto;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: #fff;
  color: var(--ink-jade);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background .25s var(--ease), color .25s var(--ease), transform .25s var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  background: var(--jade);
  color: #fff;
  transform: translateY(-2px);
}

/* ---------- section head ---------- */

.page-about .about-section { padding-top: var(--about-pad); }

.page-about .about-section .section-head { margin-bottom: 34px; }

.page-about .section-head__num {
  display: block;
  font-size: clamp(38px, 6vw, 58px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--haze);
}

.page-about .section-head__title {
  margin: 8px 0 0;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink-jade);
}

.page-about .section-head__lead {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.88;
  color: var(--gray-green);
}

/* ---------- origin ---------- */

.page-about .about-origin__grid {
  display: grid;
  gap: 26px;
}

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

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

.page-about .about-origin__aside {
  padding: 26px 24px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--mist-2), #ffffff 72%);
}

.page-about .about-origin__aside-title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--ink-jade);
}

.page-about .about-origin__aside p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray-green);
}

.page-about .about-topics {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-origin__aside-note a {
  color: var(--red);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 58, 43, .35);
}

.page-about .about-origin__aside-note a:hover { border-bottom-color: var(--red); }

/* ---------- timeline ---------- */

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

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

.page-about .about-node {
  position: relative;
  padding: 0 0 22px 46px;
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 34px;
  bottom: -4px;
  width: 2px;
  background: linear-gradient(180deg, rgba(31, 122, 106, .5), rgba(31, 122, 106, .06));
}

.page-about .about-node:last-child::before { display: none; }

.page-about .about-node__dot {
  position: absolute;
  left: 0;
  top: 4px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--jade);
  background: var(--mist);
  color: var(--jade);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: -.02em;
}

.page-about .about-node__body {
  padding: 18px 20px 16px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: 0 16px 34px -30px rgba(14, 59, 52, .6);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-node__body:hover {
  transform: translateY(-3px);
  box-shadow: 0 24px 42px -30px rgba(14, 59, 52, .72);
}

.page-about .about-node__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-size: 13px;
  color: var(--gray-green);
}

.page-about .about-node__title {
  margin: 10px 0 6px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink-jade);
}

.page-about .about-node__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-jade);
}

.page-about .about-node__more {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--about-line);
}

.page-about .about-node__more summary {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  list-style: none;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--jade);
}

.page-about .about-node__more summary::-webkit-details-marker { display: none; }

.page-about .about-node__more summary::after {
  content: "展开";
  margin-left: auto;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-green);
}

.page-about .about-node__more[open] summary::after { content: "收起"; }

.page-about .about-node__more p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray-green);
}

.page-about .about-archive {
  padding: 22px 22px 26px;
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, var(--ink-jade), #12493f);
  color: var(--mist);
  overflow: hidden;
}

.page-about .about-archive__figure {
  margin: 0 0 18px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--haze);
}

.page-about .about-archive__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-archive__title {
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.4;
  color: #ffffff;
}

.page-about .about-archive__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 250, 249, .78);
}

.page-about .about-archive__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-archive__list li {
  padding-top: 9px;
  border-top: 2px solid var(--gold);
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(247, 250, 249, .72);
}

.page-about .about-archive__list strong {
  display: block;
  margin-bottom: 2px;
  font-size: 19px;
  font-weight: 900;
  color: var(--gold);
}

/* ---------- team ---------- */

.page-about .about-team {
  display: grid;
  gap: 28px;
}

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

.page-about .about-team__sub {
  margin: 26px 0 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink-jade);
}

.page-about .about-team__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-team__list li {
  position: relative;
  padding: 14px 18px 14px 42px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-jade);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
}

.page-about .about-team__list strong {
  font-weight: 800;
  color: var(--jade);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--haze), var(--mist-2));
  box-shadow: var(--shadow-soft);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__figure figcaption {
  padding: 12px 16px 14px;
  background: var(--mist-2);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--gray-green);
}

/* ---------- certificates ---------- */

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

.page-about .about-cert {
  padding: 26px 18px 24px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(170deg, #ffffff, var(--mist-2));
  text-align: center;
}

.page-about .about-cert__seal {
  display: grid;
  place-items: center;
  width: 66px;
  height: 66px;
  margin: 0 auto 14px;
  border: 2px dashed var(--jade);
  border-radius: 50%;
  background: rgba(31, 122, 106, .06);
  color: var(--jade);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-about .about-cert__title {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink-jade);
}

.page-about .about-cert__desc {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--gray-green);
}

.page-about .about-cert__note {
  margin: 24px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray-green);
}

.page-about .about-cert__note a {
  color: var(--red);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 58, 43, .35);
}

.page-about .about-cert__note a:hover { border-bottom-color: var(--red); }

/* ---------- honors ---------- */

.page-about .about-honor {
  display: grid;
  gap: 26px;
}

.page-about .about-honor__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
}

.page-about .about-honor__stats li {
  padding: 16px 16px 18px;
  border-radius: var(--radius-sm);
  background: var(--mist-2);
}

.page-about .about-honor__stats strong {
  display: block;
  font-size: 26px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--jade);
}

.page-about .about-honor__stats span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--gray-green);
}

.page-about .about-honor__note {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-jade);
}

.page-about .about-honor__note a {
  color: var(--red);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(217, 58, 43, .35);
}

.page-about .about-honor__note a:hover { border-bottom-color: var(--red); }

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

.page-about .about-honor__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-jade);
}

.page-about .about-honor__list li:first-child { border-top: 1px solid var(--about-line); }

.page-about .about-honor__year {
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--gold);
}

/* ---------- results ---------- */

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

.page-about .about-result {
  position: relative;
  padding: 28px 24px 30px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  background: #fff;
  overflow: hidden;
  box-shadow: 0 20px 44px -38px rgba(14, 59, 52, .85);
}

.page-about .about-result::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--jade), var(--haze));
}

.page-about .about-result__num {
  margin: 0;
  font-size: clamp(38px, 5vw, 54px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--jade);
}

.page-about .about-result__title {
  margin: 14px 0 0;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.45;
  color: var(--ink-jade);
}

.page-about .about-result__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--gray-green);
}

.page-about .about-scenes {
  margin-top: 30px;
  padding: 26px 24px 28px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--mist-2), #ffffff 68%);
}

.page-about .about-scenes__title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--ink-jade);
}

.page-about .about-scenes__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-scenes__list li {
  position: relative;
  padding-left: 20px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-jade);
}

.page-about .about-scenes__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--jade);
}

/* ---------- cta ---------- */

.page-about .about-cta {
  position: relative;
  width: calc(100% - 40px);
  max-width: var(--wrap);
  margin: var(--about-pad) auto 0;
  padding: 44px 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, var(--ink-jade) 0%, #0b3029 58%, #10423a 100%);
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -90px;
  top: -90px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 164, 65, .34), transparent 70%);
}

.page-about .about-cta__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-cta h2 {
  margin: 0;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: #ffffff;
}

.page-about .about-cta p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.88;
  color: rgba(247, 250, 249, .8);
}

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

.page-about .about-cta .btn--primary {
  background: var(--red);
  border-color: var(--red);
  color: #ffffff;
}

.page-about .about-cta .btn--primary:hover {
  background: var(--red-deep);
  border-color: var(--red-deep);
}

.page-about .about-cta .btn--ghost {
  background: transparent;
  border-color: rgba(247, 250, 249, .45);
  color: #ffffff;
}

.page-about .about-cta .btn--ghost:hover {
  background: rgba(247, 250, 249, .12);
  border-color: rgba(247, 250, 249, .75);
}

/* ---------- responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-scenes__list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 28px; }
}

@media (min-width: 780px) {
  .page-about .about-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
}

@media (min-width: 880px) {
  .page-about .about-cert-list { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid { grid-template-columns: 5fr 7fr; gap: 56px; }
  .page-about .about-origin__grid { grid-template-columns: 7fr 5fr; gap: 48px; align-items: start; }
  .page-about .about-team { grid-template-columns: 7fr 5fr; gap: 48px; align-items: start; }
  .page-about .about-honor { grid-template-columns: 7fr 5fr; gap: 48px; align-items: start; }
  .page-about .about-results { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
  .page-about .about-cta { padding: 60px 64px; }
}

@media (min-width: 980px) {
  .page-about .about-timeline__layout { grid-template-columns: 7fr 5fr; gap: 48px; align-items: start; }
  .page-about .about-archive { position: sticky; top: 96px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump__link,
  .page-about .about-node__body { transition: none; }
  .page-about .about-jump__link:hover,
  .page-about .about-node__body:hover { transform: none; }
}