.page-about {
  --about-gap: clamp(18px, 2.6vw, 36px);
  --about-frame: 1px solid var(--line-soft);
  overflow-x: clip;
}

.page-about p {
  color: rgba(242, 239, 230, 0.82);
  line-height: 1.72;
  margin: 0 0 14px;
}

.page-about .muted {
  color: var(--moss);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .lede {
  color: rgba(242, 239, 230, 0.88);
  font-size: clamp(15px, 2.1vw, 18px);
  line-height: 1.72;
  margin: 0 0 18px;
}

.page-about h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4.4vw, 44px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--paper);
  margin: 12px 0 18px;
}

.page-about .hl {
  color: var(--neon);
}

.page-about .inline-link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.42);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .inline-link:hover,
.page-about .inline-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
  outline: none;
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 5vw, 56px) 0 clamp(34px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(12, 43, 35, 0.92) 0%, rgba(11, 15, 14, 0.98) 62%),
    var(--ink);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(168, 184, 176, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(168, 184, 176, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .crumbs {
  margin-bottom: clamp(20px, 3.6vw, 42px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(34px, 7.6vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  font-weight: 800;
  color: var(--paper);
  margin: 12px 0 18px;
}

.page-about .hero-meta {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 18px 0 0;
  border-top: var(--about-frame);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.page-about .hero-meta__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .hero-meta__num {
  font-family: var(--font-mono);
  font-size: clamp(19px, 3vw, 28px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--neon);
}

.page-about .hero-meta__label {
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.page-about .about-hero__figure {
  margin: 0;
  position: relative;
  border: var(--about-frame);
  background: var(--forest-deep);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  max-width: 100%;
}

/* 品牌主张 */
.page-about .claim-quote {
  margin: 0;
  align-self: start;
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.3vw, 23px);
  line-height: 1.55;
  color: var(--paper);
  border-left: 2px solid var(--amber);
  padding: 6px 0 6px 18px;
}

/* 四步流程 */
.page-about .flow {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 38px);
}

.page-about .flow-step {
  border: var(--about-frame);
  background: rgba(22, 62, 52, 0.6);
  padding: 14px 16px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .flow-step:hover {
  border-color: var(--glaze);
  transform: translateY(-2px);
}

.page-about .flow-step[open] {
  border-color: rgba(53, 242, 208, 0.5);
  background: rgba(12, 43, 35, 0.92);
}

.page-about .flow-step__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .flow-step__head:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 4px;
}

.page-about .flow-step__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-about .flow-step__name {
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 600;
  color: var(--paper);
}

.page-about .flow-step__body {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 239, 230, 0.8);
}

.page-about .flow-step__out {
  margin: 10px 0 0;
  padding-top: 9px;
  border-top: 1px solid var(--line-faint);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--neon);
}

.page-about .flow-figure {
  margin: clamp(22px, 3.4vw, 38px) 0 0;
  border: var(--about-frame);
  background: var(--forest-deep);
}

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

/* 时间线 */
.page-about .tl {
  list-style: none;
  position: relative;
  margin: clamp(22px, 3.6vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line-soft);
}

.page-about .tl__item {
  position: relative;
  padding-left: 26px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 9px;
  height: 9px;
  background: var(--glaze);
  border: 1px solid var(--neon);
}

.page-about .tl__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-about .tl__title {
  display: block;
  margin-top: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .tl__more {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--moss);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.22s var(--ease), opacity 0.22s var(--ease), margin 0.22s var(--ease);
}

.page-about .tl__item:hover .tl__more,
.page-about .tl__item:focus .tl__more,
.page-about .tl__item:focus-within .tl__more {
  max-height: 140px;
  opacity: 1;
}

.page-about .tl__item:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 6px;
}

.page-about .tl__item--now::before {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .tl__item--now .tl__year {
  color: var(--amber);
}

/* 团队 */
.page-about .squad {
  display: grid;
  gap: clamp(22px, 3.4vw, 44px);
  align-items: start;
}

.page-about .squad__grid {
  display: grid;
  gap: 12px;
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-about .squad-card {
  border: var(--about-frame);
  background: rgba(22, 62, 52, 0.5);
  padding: 15px 16px;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .squad-card:hover {
  border-color: var(--neon);
  background: rgba(22, 62, 52, 0.9);
  transform: translateY(-2px);
}

.page-about .squad-card__name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-about .squad-card__duty {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--moss);
  transition: color 0.2s var(--ease);
}

.page-about .squad-card:hover .squad-card__duty {
  color: rgba(242, 239, 230, 0.86);
}

.page-about .squad-figure {
  margin: 0;
  border: var(--about-frame);
  background: var(--forest-deep);
}

.page-about .squad-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  max-width: 100%;
}

/* 合作网络 */
.page-about .eco {
  display: grid;
  gap: clamp(24px, 3.6vw, 48px);
  align-items: center;
}

.page-about .eco__ring {
  position: relative;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px dashed var(--line-soft);
  background:
    radial-gradient(circle at 50% 50%, rgba(53, 242, 208, 0.12) 0%, rgba(53, 242, 208, 0.04) 42%, transparent 66%),
    rgba(12, 43, 35, 0.7);
  display: grid;
  place-items: center;
}

.page-about .eco__center {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.14em;
  text-align: center;
  color: var(--moss);
}

.page-about .eco__node {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-align: center;
}

.page-about .eco__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.8vw, 23px);
  line-height: 1.1;
  color: var(--neon);
  transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .eco__label {
  font-size: 11px;
  line-height: 1.35;
  max-width: 84px;
  color: var(--moss);
}

.page-about .eco__node:hover .eco__num {
  transform: scale(1.18);
  color: var(--amber);
}

.page-about .eco__node--a {
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
}

.page-about .eco__node--b {
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
}

.page-about .eco__node--c {
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
}

.page-about .eco__node--d {
  left: -4px;
  top: 50%;
  transform: translateY(-50%);
}

.page-about .honor {
  margin-top: clamp(20px, 3vw, 32px);
  border-left: 3px solid var(--amber);
  padding: 4px 0 4px 16px;
}

.page-about .honor__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .honor__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--moss);
}

.page-about .about-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* 响应式 */
@media (min-width: 640px) {
  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .squad__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .eco__ring {
    max-width: 340px;
  }

  .page-about .eco__label {
    max-width: 96px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 0.94fr 1.06fr;
    align-items: end;
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .squad {
    grid-template-columns: 1.08fr 0.92fr;
  }

  .page-about .eco {
    grid-template-columns: 0.82fr 1.18fr;
  }

  .page-about .eco__ring {
    max-width: 380px;
  }

  .page-about .tl {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
    padding-top: 24px;
  }

  .page-about .tl::before {
    left: 0;
    right: 0;
    top: 8px;
    bottom: auto;
    width: auto;
    height: 1px;
  }

  .page-about .tl__item {
    padding-left: 0;
  }

  .page-about .tl__item::before {
    left: 0;
    top: -16px;
  }
}

@media (min-width: 1120px) {
  .page-about .flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (hover: none) {
  .page-about .tl__more {
    max-height: none;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow-step,
  .page-about .squad-card,
  .page-about .eco__num,
  .page-about .tl__more,
  .page-about .inline-link,
  .page-about .squad-card__duty {
    transition: none;
  }

  .page-about .flow-step:hover,
  .page-about .squad-card:hover {
    transform: none;
  }

  .page-about .eco__node:hover .eco__num {
    transform: none;
  }
}