.page-about {
  --rail-w: 20px;
  --about-hair: var(--ps-line-200);
  display: block;
  background: var(--ps-paper-50);
  color: var(--ps-ink-900);
  font-family: var(--ps-font);
  font-size: 17px;
  line-height: 1.75;
}

@media (min-width: 960px) {
  .page-about {
    --rail-w: 88px;
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 20px 0 44px;
  background-color: var(--ps-white);
  background-image:
    linear-gradient(180deg, rgba(5, 166, 92, 0.09), rgba(255, 255, 255, 0) 62%),
    repeating-linear-gradient(90deg, var(--ps-grid) 0 1px, transparent 1px 56px);
  border-bottom: 1px solid var(--ps-line-200);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -10%;
  top: 13%;
  width: 44%;
  height: 5px;
  border-radius: var(--ps-r-pill);
  background: linear-gradient(90deg, rgba(255, 106, 26, 0), var(--ps-orange-500));
  transform: skewY(-4deg);
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 24px;
  margin-top: 20px;
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .about-hero-lead {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-h1 {
  margin: 12px 0 24px;
  font-size: clamp(30px, 8.4vw, 46px);
  line-height: 1.14;
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--ps-ink-900);
}

.page-about .about-h1-mark {
  position: relative;
  display: inline-block;
  color: var(--ps-green-800);
  padding: 0 2px;
  box-shadow: inset 0 -0.34em 0 rgba(255, 210, 51, 0.62);
}

.page-about .about-hero-side {
  display: grid;
  gap: 22px;
}

.page-about .about-facts {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ps-line-200);
  border: 1px solid var(--ps-line-200);
  border-radius: var(--ps-r-md);
  overflow: hidden;
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--ps-white);
}

@media (min-width: 680px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-fact-num {
  font-family: var(--ps-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--ps-green-800);
}

.page-about .about-fact-label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ps-ink-soft);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 竖向轨道与章节 ---------- */
.page-about .about-rail {
  padding: 6px 0 0;
}

.page-about .about-chapter {
  position: relative;
  display: flow-root;
  padding: 32px 0 32px var(--rail-w);
  border-left: 1px solid var(--ps-line-200);
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 38px;
  width: 3px;
  height: 30px;
  border-radius: var(--ps-r-pill);
  background: linear-gradient(180deg, var(--ps-green-600), var(--ps-orange-500));
}

.page-about .about-chapter-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--ps-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.09em;
  color: var(--ps-green-800);
}

.page-about .about-chapter-mark::after {
  content: "";
  flex: 0 1 auto;
  width: 64px;
  height: 1px;
  background: var(--ps-line-200);
}

.page-about .about-h2 {
  position: relative;
  margin: 0 0 18px;
  font-size: clamp(23px, 6vw, 33px);
  line-height: 1.22;
  font-weight: 900;
  font-style: italic;
  letter-spacing: -0.015em;
  color: var(--ps-ink-900);
}

.page-about .about-h2::after {
  content: "";
  display: block;
  width: 54px;
  height: 6px;
  margin-top: 12px;
  border-radius: var(--ps-r-pill);
  background: linear-gradient(90deg, var(--ps-green-600), var(--ps-yellow-400));
  transform: skewX(-24deg);
}

.page-about .about-p {
  max-width: 68ch;
  margin: 0 0 16px;
  color: var(--ps-ink-soft);
}

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

.page-about .about-p strong {
  color: var(--ps-ink-900);
  font-weight: 700;
}

.page-about .about-inline-link {
  color: var(--ps-green-800);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(5, 102, 58, 0.35);
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover {
  text-decoration-color: var(--ps-green-800);
}

/* 数据旁注 */
.page-about .about-side {
  margin: 0 0 20px;
  padding: 14px 16px;
  background: var(--ps-white);
  border: 1px solid var(--ps-silver-300);
  border-radius: var(--ps-r-md);
  box-shadow: var(--ps-shadow-1);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ps-ink-soft);
}

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

.page-about .about-side-title {
  display: block;
  margin-bottom: 6px;
  font-family: var(--ps-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ps-orange-500);
}

.page-about .about-side strong {
  font-family: var(--ps-mono);
  color: var(--ps-ink-900);
}

@media (min-width: 1040px) {
  .page-about .about-side {
    float: right;
    width: 264px;
    margin: 4px 0 18px 32px;
  }
}

/* ---------- 三件事折叠 ---------- */
.page-about .about-accordion {
  margin: 0 0 12px;
  background: var(--ps-white);
  border: 1px solid var(--ps-line-200);
  border-radius: var(--ps-r-md);
  box-shadow: var(--ps-shadow-1);
  overflow: hidden;
}

.page-about .about-accordion summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ps-ink-900);
}

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

.page-about .about-accordion summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--ps-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--ps-green-800);
}

.page-about .about-accordion[open] summary::after {
  content: "–";
  color: var(--ps-orange-500);
}

.page-about .about-accordion summary:focus-visible {
  outline: 2px solid var(--ps-orange-500);
  outline-offset: -2px;
}

.page-about .about-acc-num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--ps-mono);
  font-size: 13px;
  color: var(--ps-orange-500);
}

.page-about .about-accordion .ps-accordion-body {
  padding: 0 18px 18px 46px;
  color: var(--ps-ink-soft);
  font-size: 16px;
}

.page-about .about-accordion .ps-accordion-body p {
  margin: 0;
}

/* ---------- 分段切换 ---------- */
.page-about .about-tabs {
  margin-top: 6px;
  padding-bottom: 18px;
}

.page-about .about-tabs .ps-tablist {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ps-line-200);
}

.page-about .about-tabs .ps-tab {
  appearance: none;
  padding: 8px 15px;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ps-ink-soft);
  background: var(--ps-white);
  border: 1px solid var(--ps-line-200);
  border-radius: var(--ps-r-pill);
  cursor: pointer;
  transition: color var(--ps-fast) var(--ps-ease), background-color var(--ps-fast) var(--ps-ease), border-color var(--ps-fast) var(--ps-ease);
}

.page-about .about-tabs .ps-tab:hover {
  border-color: var(--ps-green-600);
  color: var(--ps-green-800);
}

.page-about .about-tabs .ps-tab[aria-selected="true"] {
  color: var(--ps-white);
  background: var(--ps-green-600);
  border-color: var(--ps-green-600);
}

.page-about .about-tabs .ps-tab:focus-visible {
  outline: 2px solid var(--ps-orange-500);
  outline-offset: 2px;
}

.page-about .about-tabs .ps-tabpanel {
  padding: 18px 18px 20px;
  background: var(--ps-white);
  border: 1px solid var(--ps-line-200);
  border-left: 4px solid var(--ps-orange-500);
  border-radius: 0 var(--ps-r-md) var(--ps-r-md) 0;
}

.page-about .about-tabs .ps-tabpanel:focus-visible {
  outline: 2px solid var(--ps-orange-500);
  outline-offset: 2px;
}

.page-about .about-tabs .ps-tabpanel .about-p {
  margin: 0;
}

/* ---------- 满出血数据条 ---------- */
.page-about .about-break {
  margin: 10px 0 10px calc(var(--rail-w) * -1);
  padding: 28px 20px;
  border-radius: var(--ps-r-md);
  background-color: var(--ps-blue-900);
  background-image: radial-gradient(120% 150% at 88% 0%, rgba(5, 166, 92, 0.34), rgba(5, 166, 92, 0) 62%);
  color: var(--ps-white);
}

@media (min-width: 960px) {
  .page-about .about-break {
    padding: 42px 40px;
    border-radius: var(--ps-r-lg);
  }
}

.page-about .about-break-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 18px;
}

@media (min-width: 860px) {
  .page-about .about-break-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
  }
}

.page-about .about-break-num {
  display: block;
  font-family: var(--ps-mono);
  font-size: clamp(25px, 6.4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--ps-yellow-400);
}

.page-about .about-break-label {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-break.is-revealed .about-break-item {
  animation: about-grow 560ms var(--ps-ease) both;
}

.page-about .about-break.is-revealed .about-break-item:nth-child(2) {
  animation-delay: 70ms;
}

.page-about .about-break.is-revealed .about-break-item:nth-child(3) {
  animation-delay: 140ms;
}

.page-about .about-break.is-revealed .about-break-item:nth-child(4) {
  animation-delay: 210ms;
}

@keyframes about-grow {
  from {
    transform: translateY(14px);
  }
  to {
    transform: translateY(0);
  }
}

/* ---------- 图片容器 ---------- */
.page-about .about-media {
  margin: 0 0 20px;
  background: var(--ps-white);
  border: 1px solid var(--ps-line-200);
  border-radius: var(--ps-r-md);
  box-shadow: var(--ps-shadow-1);
  overflow: hidden;
}

.page-about .about-media--tight {
  margin-bottom: 4px;
}

.page-about .about-media--narrow {
  max-width: 640px;
}

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

.page-about .about-media .ps-figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ps-ink-soft);
  border-top: 1px solid var(--ps-line-200);
  background: var(--ps-paper-50);
}

/* ---------- 团队角色 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

@media (min-width: 760px) {
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-role {
  padding: 18px;
  background: var(--ps-white);
  border: 1px solid var(--ps-line-200);
  border-top: 3px solid var(--ps-green-600);
  border-radius: var(--ps-r-md);
  box-shadow: var(--ps-shadow-1);
}

.page-about .about-role:nth-child(2) {
  border-top-color: var(--ps-orange-500);
}

.page-about .about-role:nth-child(3) {
  border-top-color: var(--ps-blue-700);
}

.page-about .about-role-num {
  font-family: var(--ps-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--ps-ink-soft);
}

.page-about .about-role-title {
  margin: 6px 0 8px;
  font-size: 18px;
  font-weight: 800;
  font-style: italic;
  color: var(--ps-ink-900);
}

.page-about .about-role-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ps-ink-soft);
}

/* ---------- 发展时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 6px 0 0;
  padding: 0 0 0 24px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--ps-green-600), var(--ps-line-200) 72%);
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 26px;
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 10px;
  height: 10px;
  margin-left: -4.5px;
  border-radius: 50%;
  background: var(--ps-green-600);
  box-shadow: 0 0 0 4px rgba(5, 166, 92, 0.14);
  transition: background-color var(--ps-base) var(--ps-ease), box-shadow var(--ps-base) var(--ps-ease);
}

.page-about .about-tl-item:hover::before,
.page-about .about-tl-item:focus-within::before {
  background: var(--ps-orange-500);
  box-shadow: 0 0 0 6px rgba(255, 106, 26, 0.18);
}

.page-about .about-tl-figure::before {
  display: none;
}

.page-about .about-tl-year {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 11px;
  font-family: var(--ps-mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ps-white);
  background: var(--ps-blue-700);
  border-radius: var(--ps-r-pill);
}

.page-about .about-tl-title {
  margin: 0 0 6px;
  font-size: 19px;
  font-weight: 800;
  font-style: italic;
  line-height: 1.4;
  color: var(--ps-ink-900);
}

.page-about .about-tl-text {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.72;
  color: var(--ps-ink-soft);
}

.page-about .about-tl-text .about-inline-link {
  font-weight: 700;
}

/* ---------- 合作生态 ---------- */
.page-about .about-coop {
  display: grid;
  gap: 12px;
  margin: 20px 0 22px;
}

@media (min-width: 780px) {
  .page-about .about-coop {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-coop-item {
  padding: 16px 18px;
  background: var(--ps-white);
  border: 1px solid var(--ps-line-200);
  border-left: 4px solid var(--ps-orange-500);
  border-radius: 0 var(--ps-r-sm) var(--ps-r-sm) 0;
  box-shadow: var(--ps-shadow-1);
}

.page-about .about-coop-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ps-ink-900);
}

.page-about .about-coop-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ps-ink-soft);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: 40px 0 56px;
}

.page-about .about-cta-card {
  position: relative;
  padding: 30px 22px 30px 28px;
  background: var(--ps-white);
  border: 1px solid var(--ps-line-200);
  border-radius: var(--ps-r-lg);
  box-shadow: var(--ps-shadow-2);
  overflow: hidden;
}

.page-about .about-cta-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--ps-green-600), var(--ps-orange-500) 58%, var(--ps-yellow-400));
}

@media (min-width: 960px) {
  .page-about .about-cta-card {
    padding: 44px 48px 44px 52px;
  }
}

.page-about .about-cta-title {
  margin: 0 0 12px;
  font-size: clamp(23px, 6vw, 30px);
  font-weight: 900;
  font-style: italic;
  line-height: 1.24;
  color: var(--ps-ink-900);
}

.page-about .about-cta-text {
  max-width: 62ch;
  margin: 0 0 22px;
  color: var(--ps-ink-soft);
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}
</main>