.page-about {
  --about-cut: 16px;
  --about-gold-line: rgba(201, 162, 39, 0.38);
  --about-gap: clamp(28px, 4vw, 56px);
  color: var(--porcelain);
  font-family: var(--font-sans);
  line-height: 1.85;
  overflow-x: clip;
}

.page-about .about-wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(56px, 8vw, 104px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding: clamp(20px, 3vw, 32px) 0 0;
}

.page-about .about-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-about .about-crumbs__list a {
  color: rgba(247, 244, 236, 0.6);
  text-decoration: none;
  transition: color 0.24s var(--ease);
}

.page-about .about-crumbs__list a:hover,
.page-about .about-crumbs__list a:focus-visible {
  color: var(--gold-light);
}

.page-about .about-crumbs__sep {
  color: rgba(201, 162, 39, 0.5);
}

.page-about .about-crumbs__current {
  color: var(--gold-light);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: end;
  padding: clamp(32px, 5vw, 56px) 0 clamp(44px, 6vw, 80px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -14%;
  right: -16%;
  width: 68%;
  height: 128%;
  background: linear-gradient(158deg, rgba(42, 27, 77, 0.92), rgba(11, 14, 26, 0));
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-eyebrow__line {
  display: block;
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0));
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(34px, 6vw, 72px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--porcelain);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold-light);
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 56ch;
  font-size: clamp(16px, 1.3vw, 18px);
  color: rgba(247, 244, 236, 0.84);
}

.page-about .about-hero__meta {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(234, 212, 138, 0.78);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  padding: 10px;
  border-top: 1px solid var(--about-gold-line);
  border-left: 1px solid var(--about-gold-line);
  background: linear-gradient(150deg, rgba(91, 58, 166, 0.2), rgba(11, 14, 26, 0) 62%);
}

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

.page-about .about-figure__cap {
  margin: 12px 2px 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(247, 244, 236, 0.6);
}

.page-about .about-figure--wide {
  margin: clamp(24px, 3vw, 36px) 0;
}

/* ---------- 长文骨架 ---------- */
.page-about .about-scroll {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-toc {
  display: none;
}

.page-about .about-toc__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

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

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0 8px 12px;
  border-left: 1px solid var(--edge);
  font-size: 14px;
  line-height: 1.5;
  color: rgba(247, 244, 236, 0.62);
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  color: var(--gold-light);
  border-left-color: var(--gold);
}

.page-about .about-toc__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(201, 162, 39, 0.76);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: clamp(40px, 5.5vw, 72px) 0;
  border-top: 1px solid rgba(56, 64, 92, 0.55);
  scroll-margin-top: 96px;
}

.page-about .about-sec__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(10px, 2vw, 22px);
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-sec__num {
  flex: 0 0 auto;
  font-family: var(--font-brush);
  font-size: clamp(50px, 8.6vw, 100px);
  line-height: 0.8;
  letter-spacing: 0.02em;
  color: rgba(201, 162, 39, 0.14);
  -webkit-text-stroke: 1px rgba(201, 162, 39, 0.62);
  margin-bottom: -0.06em;
}

.page-about .about-sec__title {
  position: relative;
  z-index: 1;
  margin: 0;
  padding-top: 0.14em;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(23px, 3.1vw, 38px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--porcelain);
}

.page-about .about-sec__content p {
  margin: 0 0 20px;
  max-width: 66ch;
  font-size: 17px;
  color: rgba(247, 244, 236, 0.86);
}

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

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  color: var(--purple-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(139, 107, 224, 0.45);
  padding-bottom: 2px;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

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

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 8px 0 0;
  padding: 4px 0 4px 28px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 162, 39, 0), var(--gold) 10%, var(--gold) 90%, rgba(201, 162, 39, 0));
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cinnabar);
  box-shadow: 0 0 0 2px rgba(11, 14, 26, 0.9), 0 0 12px rgba(192, 57, 43, 0.55);
}

.page-about .about-gen__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 9px 14px;
  border-left: 2px solid transparent;
  cursor: pointer;
  list-style: none;
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease);
}

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

.page-about .about-gen__sum:hover,
.page-about .about-gen__sum:focus-visible {
  background: rgba(91, 58, 166, 0.14);
  border-left-color: var(--gold);
}

.page-about .about-gen__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--gold-light);
}

.page-about .about-gen[open] .about-gen__sum::after {
  content: "–";
}

.page-about .about-gen__gen {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-gen__name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--porcelain);
}

.page-about .about-gen__body {
  padding: 0 14px 12px 14px;
}

.page-about .about-gen__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.74);
}

/* ---------- 色板 ---------- */
.page-about .about-swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 14px;
  list-style: none;
  margin: 26px 0 28px;
  padding: 0;
}

.page-about .about-swatch {
  border: 1px solid var(--edge);
  background: rgba(20, 26, 46, 0.6);
}

.page-about .about-swatch__chip {
  display: block;
  height: 58px;
}

.page-about .about-swatch__chip--ink { background: var(--ink); }
.page-about .about-swatch__chip--purpleDeep { background: var(--purple-deep); }
.page-about .about-swatch__chip--purple { background: var(--purple); }
.page-about .about-swatch__chip--gold { background: var(--gold); }
.page-about .about-swatch__chip--cinnabar { background: var(--cinnabar); }
.page-about .about-swatch__chip--porcelain { background: var(--porcelain); }

.page-about .about-swatch__meta {
  display: block;
  padding: 10px 12px 12px;
}

.page-about .about-swatch__name {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--gold-light);
}

.page-about .about-swatch__desc {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(247, 244, 236, 0.68);
}

/* ---------- 团队 ---------- */
.page-about .about-teams {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  list-style: none;
  margin: 24px 0 28px;
  padding: 0;
}

.page-about .about-teams li {
  padding: 8px 0 8px 14px;
  border-left: 2px solid rgba(91, 58, 166, 0.7);
}

.page-about .about-teams strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--gold-light);
}

.page-about .about-teams span {
  display: block;
  margin-top: 3px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(247, 244, 236, 0.76);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(136px, 1fr));
  gap: 14px;
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
}

.page-about .about-stat {
  padding: 16px 16px 18px;
  border-top: 1px solid var(--about-gold-line);
  background: linear-gradient(180deg, rgba(42, 27, 77, 0.6), rgba(20, 26, 46, 0.18));
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.1;
  color: var(--gold-light);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(247, 244, 236, 0.7);
}

/* ---------- 实验室 ---------- */
.page-about .about-sec__content--split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 36px);
  align-items: start;
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta-panel {
  margin: 28px 0 24px;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(201, 162, 39, 0.3);
  background: linear-gradient(145deg, rgba(42, 27, 77, 0.85), rgba(11, 14, 26, 0.4));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-cta-panel__title {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 18px;
  color: var(--gold-light);
}

.page-about .about-cta-panel__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.page-about .about-cta-panel__list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.82);
}

.page-about .about-cta-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

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

.page-about .about-contact-line {
  font-size: 14px;
  line-height: 1.9;
  color: rgba(247, 244, 236, 0.66);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-teams {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: 7fr 5fr;
  }

  .page-about .about-sec__content--split {
    grid-template-columns: 5fr 7fr;
  }

  .page-about .about-sec__content--split .about-figure--tall {
    grid-column: 1;
  }

  .page-about .about-sec__content--split .about-sec__text {
    grid-column: 2;
  }
}

@media (min-width: 1080px) {
  .page-about .about-scroll {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .about-toc {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
  }

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

  .page-about .about-sec__head {
    align-items: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crumbs__list a,
  .page-about .about-toc__link,
  .page-about .about-link,
  .page-about .about-gen__sum {
    transition: none;
  }
}