.page-about {
  background: var(--ink-0);
  color: var(--fog);
}

/* 面包屑 */
.page-about .about-crumb {
  padding-bottom: clamp(16px, 2.4vw, 28px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.page-about .about-crumb a {
  color: var(--mute);
  text-decoration: none;
}
.page-about .about-crumb a:hover {
  color: var(--orange);
}
.page-about .about-crumb .breadcrumb__current {
  color: var(--fog);
}

/* 首屏框景 */
.page-about .about-hero {
  padding: clamp(24px, 4vw, 56px) 0 clamp(40px, 6vw, 88px);
}
.page-about .about-hero__frame {
  position: relative;
  overflow: hidden;
  border: var(--line-w) solid var(--line);
  background: linear-gradient(158deg, var(--ink-1) 0%, var(--ink-0) 62%);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 3vw, 44px);
}
.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: -14%;
  right: -8%;
  width: 58%;
  height: 2px;
  background: var(--orange);
  transform: rotate(-24deg);
  transform-origin: right center;
  opacity: 0.75;
}
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 96px;
  height: 96px;
  border-left: var(--line-w) solid var(--orange);
  border-bottom: var(--line-w) solid var(--orange);
  opacity: 0.5;
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}
.page-about .about-hero__copy .eyebrow {
  margin-bottom: clamp(14px, 2vw, 22px);
}
.page-about .about-hero h1 {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(38px, 6.2vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--white);
}
.page-about .about-hero h1 strong {
  display: block;
  font-weight: 700;
  color: var(--orange);
}
.page-about .about-hero__lede {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--fog);
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .about-hero__media {
  margin: 0;
  border: var(--line-w) solid var(--line);
  background: var(--ink-1);
  box-shadow: var(--shadow-hard);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
}
.page-about .about-hero__media figcaption,
.page-about .about-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mute);
  padding: 10px 14px;
  border-top: var(--line-w) solid var(--line);
  background: var(--ink-1);
}

/* 章节骨架 */
.page-about .about-chapter {
  padding: clamp(36px, 6vw, 84px) 0;
  border-top: var(--line-w) solid var(--line);
}
.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 40px);
}
.page-about .about-chapter__num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}
.page-about .about-chapter__title {
  margin: 0 0 12px;
  font-family: var(--font-body);
  font-size: clamp(25px, 3.4vw, 44px);
  font-weight: 300;
  line-height: 1.18;
  color: var(--white);
  max-width: 14em;
}
.page-about .about-chapter__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mute);
}
.page-about .about-chapter__body > p {
  margin: 0 0 1.1em;
  max-width: 40em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.82;
  color: var(--fog);
}
.page-about .about-chapter__body > p:last-child {
  margin-bottom: 0;
}
.page-about .about-chapter__lead {
  font-size: clamp(17px, 2vw, 21px) !important;
  font-weight: 300;
  line-height: 1.7 !important;
  color: var(--white) !important;
  padding-left: 16px;
  border-left: var(--line-w) solid var(--orange-dim);
}

/* 时间线 */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0 0 0 clamp(16px, 2.4vw, 26px);
  border-left: var(--line-w) solid var(--line);
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
}
.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: clamp(13px, 1.8vw, 18px) clamp(14px, 2vw, 20px);
  background: var(--ink-1);
  border: var(--line-w) solid var(--line);
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 22px;
  left: calc(-1 * clamp(16px, 2.4vw, 26px) - 7px);
  width: 12px;
  height: 12px;
  background: var(--ink-0);
  border: var(--line-w) solid var(--orange);
  border-radius: 50%;
}
.page-about .about-timeline__item:hover {
  transform: translateX(2px);
  border-color: var(--orange);
}
.page-about .about-timeline__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mint);
}
.page-about .about-timeline__text h3 {
  margin: 0 0 5px;
  font-size: 16.5px;
  font-weight: 500;
  color: var(--white);
}
.page-about .about-timeline__text p {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mute);
}

/* 通用插图 */
.page-about .about-figure {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  border: var(--line-w) solid var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--ink-1);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* 团队 */
.page-about .about-crew {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 1.6vw, 18px);
}
.page-about .about-crew__item {
  position: relative;
  overflow: hidden;
  padding: clamp(18px, 2.2vw, 26px) clamp(16px, 2vw, 22px);
  background: var(--ink-2);
  border: var(--line-w) solid var(--line);
}
.page-about .about-crew__item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: var(--accent, var(--orange));
}
.page-about .about-crew__item--a { --accent: var(--indigo); }
.page-about .about-crew__item--b { --accent: var(--orange); }
.page-about .about-crew__item--c { --accent: var(--mint); }
.page-about .about-crew__item--d { --accent: var(--wine); }
.page-about .about-crew__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 4.4vw, 52px);
  line-height: 1;
  color: var(--white);
}
.page-about .about-crew__item h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--mint);
}
.page-about .about-crew__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--fog);
}

/* 组织方式清单 */
.page-about .about-rules {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  border-top: var(--line-w) solid var(--line);
}
.page-about .about-rules__row {
  display: grid;
  gap: 6px;
  padding: clamp(14px, 1.8vw, 18px) 0;
  border-bottom: var(--line-w) solid var(--line);
}
.page-about .about-rules dt {
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
}
.page-about .about-rules dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mute);
}

/* 规模数据 */
.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(10px, 1.4vw, 16px);
}
.page-about .about-stats li {
  padding: clamp(14px, 1.8vw, 18px) clamp(14px, 1.8vw, 20px);
  background: var(--ink-1);
  border: var(--line-w) solid var(--line);
  border-left: 6px solid var(--mint);
}
.page-about .about-stats__n {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  color: var(--white);
}
.page-about .about-stats__u {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mint);
  margin-left: 3px;
}
.page-about .about-stats__l {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

/* 页尾行动区 */
.page-about .about-cta {
  margin-top: clamp(36px, 5vw, 72px);
  border-top: var(--line-w) solid var(--line);
  background: linear-gradient(118deg, var(--indigo) 0%, var(--ink-1) 58%, var(--ink-0) 100%);
}
.page-about .about-cta__inner {
  padding: clamp(36px, 5.4vw, 76px) 0 clamp(40px, 5.6vw, 80px);
}
.page-about .about-cta h2 {
  margin: 0 0 14px;
  max-width: 18em;
  font-size: clamp(24px, 3.4vw, 42px);
  font-weight: 300;
  line-height: 1.2;
  color: var(--white);
}
.page-about .about-cta p {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 38em;
  font-size: clamp(14.5px, 1.5vw, 16.5px);
  line-height: 1.78;
  color: var(--fog);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 桌面布局 */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4.4vw, 64px);
  }
  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
  .page-about .about-chapter__head {
    position: sticky;
    top: calc(var(--cmdbar-h) + 24px);
    align-self: start;
  }
  .page-about .about-rules__row {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(18px, 2.6vw, 34px);
    align-items: baseline;
  }
}

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

@media (min-width: 860px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .page-about .about-stats {
    grid-template-columns: 1fr;
  }
  .page-about .about-chapter__lead {
    padding-left: 12px;
  }
}

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