.page-about {
  background: var(--ink-900);
  color: var(--text-000);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(32px, 6vw, 72px);
}

.page-about a {
  color: var(--gold-200);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 164, 76, 0.5);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-about .breadcrumbs {
  padding-top: 18px;
  padding-bottom: 4px;
}

.page-about .breadcrumbs a {
  border-bottom: 0;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(28px, 6vw, 76px) clamp(22px, 4vw, 48px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -16%;
  right: -30%;
  width: min(82vw, 660px);
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 34% 32%, rgba(79, 227, 208, 0.16), transparent 60%),
    linear-gradient(135deg, rgba(31, 107, 84, 0.62), rgba(7, 18, 15, 0) 72%);
  clip-path: polygon(20% 0, 100% 14%, 84% 100%, 0 76%);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 8.4vw, 86px);
  line-height: 1.03;
  letter-spacing: 0.02em;
  margin: 12px 0 0;
  max-width: 15ch;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--gold-400);
}

.page-about .about-hero__lede {
  margin: clamp(16px, 3vw, 28px) 0 0;
  max-width: 44ch;
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.85;
  color: var(--text-400);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--hairline);
}

.page-about .about-stats > li {
  padding: 16px 10px 16px 0;
  border-bottom: 1px solid rgba(201, 164, 76, 0.14);
  min-width: 0;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.1;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--gold-400);
  margin-bottom: 6px;
}

.page-about .about-stats__k {
  display: block;
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-400);
}

/* ---------- 通用文本 ---------- */

.page-about .about-copy p {
  margin: 0 0 1em;
  max-width: 40em;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.85;
  color: var(--text-400);
}

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

.page-about .about-lead {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-400);
}

.page-about .section-title {
  letter-spacing: 0.02em;
  line-height: 1.14;
  margin: 10px 0 0;
  max-width: 20ch;
}

.page-about .section-title em {
  font-style: normal;
  color: var(--gold-400);
}

/* ---------- 图片块 ---------- */

.page-about .about-fig {
  margin: 0;
  border: 2px solid var(--gold-400);
  box-shadow: var(--shadow-hard);
  background: var(--ink-800);
  overflow: hidden;
}

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

.page-about .about-fig figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--text-400);
  padding: 10px 12px;
  border-top: 1px solid rgba(201, 164, 76, 0.24);
  background: var(--ink-700);
}

/* ---------- 起点 ---------- */

.page-about .about-origin {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  align-items: start;
  padding-block: clamp(26px, 5vw, 64px);
  border-top: 1px solid var(--hairline);
}

/* ---------- 四步流程 ---------- */

.page-about .about-flow {
  padding-block: clamp(32px, 6vw, 80px);
  border-top: 1px solid var(--hairline);
  background: linear-gradient(
    180deg,
    rgba(12, 29, 24, 0) 0%,
    rgba(12, 29, 24, 0.72) 16%,
    rgba(12, 29, 24, 0.72) 84%,
    rgba(12, 29, 24, 0) 100%
  );
}

.page-about .about-flow__grid {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  margin-top: clamp(20px, 4vw, 36px);
}

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

.page-about .about-step {
  position: relative;
  padding: 18px 16px 18px 64px;
  background: var(--ink-800);
  border: 2px solid rgba(201, 164, 76, 0.26);
  min-width: 0;
}

.page-about .about-step__no {
  position: absolute;
  left: 14px;
  top: 18px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-900);
  background: var(--gold-400);
}

.page-about .about-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 26px;
  bottom: -13px;
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 7px solid var(--jade-500);
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--text-000);
}

.page-about .about-step p {
  margin: 0 0 8px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-400);
}

.page-about .about-step__out {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan-400);
}

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

/* ---------- 三组分工 ---------- */

.page-about .about-team {
  padding-block: clamp(32px, 6vw, 80px);
  border-top: 1px solid var(--hairline);
}

.page-about .about-team__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-crew {
  position: relative;
  min-width: 0;
  padding: 20px 18px 22px;
  background: var(--ink-800);
  border: 2px solid rgba(201, 164, 76, 0.24);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.page-about .about-crew__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-200);
}

.page-about .about-crew__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--text-000);
}

.page-about .about-crew__sum {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-400);
}

.page-about .about-crew__more p {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-400);
}

.page-about .about-crew__out {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan-400);
}

/* ---------- 版本演进时间轴 ---------- */

.page-about .about-timeline {
  padding-block: clamp(32px, 6vw, 80px);
  border-top: 1px solid var(--hairline);
}

.page-about .about-tl {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(
    180deg,
    rgba(201, 164, 76, 0.7),
    rgba(201, 164, 76, 0.12)
  );
}

.page-about .about-tl__item {
  position: relative;
  padding-left: 36px;
  padding-bottom: clamp(24px, 4vw, 46px);
  min-width: 0;
}

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

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--gold-400);
  background: var(--ink-900);
  z-index: 1;
  transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

.page-about .about-tl__item.is-in::before {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  box-shadow: 0 0 0 5px rgba(79, 227, 208, 0.12);
}

.page-about .about-tl__year {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--gold-400);
  margin-bottom: 10px;
  transition: color 0.4s ease;
}

.page-about .about-tl__item.is-in .about-tl__year {
  color: var(--cyan-400);
}

.page-about .about-tl__year em {
  font-style: normal;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--text-400);
}

.page-about .about-tl__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 22px);
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--text-000);
}

.page-about .about-tl__body p {
  margin: 0;
  max-width: 40em;
  font-size: clamp(14.5px, 1.7vw, 16px);
  line-height: 1.85;
  color: var(--text-400);
}

/* ---------- 读者分布 ---------- */

.page-about .about-audience {
  padding-block: clamp(32px, 6vw, 80px);
  border-top: 1px solid var(--hairline);
}

.page-about .about-aud-grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  margin-top: clamp(20px, 4vw, 34px);
  align-items: start;
}

.page-about .about-bars {
  border: 2px solid rgba(201, 164, 76, 0.28);
  background: var(--ink-800);
  padding: 18px 16px 16px;
  min-width: 0;
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) 52px;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.page-about .about-bar__k {
  font-size: 13px;
  color: var(--text-400);
}

.page-about .about-bar__track {
  display: block;
  height: 10px;
  background: rgba(31, 107, 84, 0.28);
  border-left: 2px solid var(--jade-500);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--jade-500), var(--gold-400));
}

.page-about .about-bar__fill--68 { width: 68%; }
.page-about .about-bar__fill--27 { width: 27%; }
.page-about .about-bar__fill--05 { width: 5%; }

.page-about .about-bar__v {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--gold-400);
  text-align: right;
}

.page-about .about-bars__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid rgba(201, 164, 76, 0.16);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-400);
}

.page-about .about-bars__note .mono {
  font-family: var(--font-mono);
  color: var(--gold-200);
}

/* ---------- 合作与收录 ---------- */

.page-about .about-partners {
  padding-block: clamp(32px, 6vw, 80px);
  border-top: 1px solid var(--hairline);
}

.page-about .about-partners__grid {
  display: grid;
  gap: clamp(18px, 3.5vw, 40px);
  margin-top: clamp(22px, 4vw, 38px);
}

/* ---------- 联系收束 ---------- */

.page-about .about-contact {
  padding-block: clamp(32px, 6vw, 80px) clamp(20px, 4vw, 40px);
}

.page-about .about-contact__panel {
  position: relative;
  padding: clamp(22px, 4vw, 48px);
  background: var(--ink-700);
  border: 2px solid var(--gold-400);
  box-shadow: var(--shadow-hard);
  background-image:
    radial-gradient(circle at 100% 0%, rgba(79, 227, 208, 0.1), transparent 52%),
    linear-gradient(180deg, rgba(12, 29, 24, 0) 0%, rgba(7, 18, 15, 0.5) 100%);
}

.page-about .about-contact__panel > p {
  margin: 14px 0 0;
  max-width: 42em;
  font-size: clamp(14.5px, 1.8vw, 16.5px);
  line-height: 1.85;
  color: var(--text-400);
}

.page-about .about-contact__dl {
  margin: clamp(20px, 3vw, 30px) 0 clamp(20px, 3vw, 28px);
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(201, 164, 76, 0.22);
}

.page-about .about-contact__dl > div {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr);
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(201, 164, 76, 0.16);
}

.page-about .about-contact__dl dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gold-200);
  line-height: 1.9;
}

.page-about .about-contact__dl dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-000);
  word-break: break-word;
}

/* ---------- 平板 ---------- */

@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stats > li {
    padding: 18px 14px 18px 16px;
    border-left: 1px solid rgba(201, 164, 76, 0.14);
  }

  .page-about .about-stats > li:first-child {
    padding-left: 0;
    border-left: 0;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 880px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  }

  .page-about .about-origin__media {
    margin-top: 42px;
  }

  .page-about .about-aud-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (min-width: 860px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border-top: 3px solid var(--gold-400);
    border-bottom: 3px solid var(--gold-400);
  }

  .page-about .about-crew {
    border: 0;
    padding: 24px 22px 28px;
  }

  .page-about .about-team__grid > .about-crew + .about-crew {
    border-left: 1px solid rgba(201, 164, 76, 0.16);
  }

  .page-about .about-crew:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 16%;
    bottom: 16%;
    right: -2px;
    width: 3px;
    background: var(--coral-500);
  }

  .page-about .about-crew:hover {
    background: var(--ink-700);
  }
}

@media (hover: hover) and (min-width: 860px) {
  .page-about .about-crew__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.28s ease;
  }

  .page-about .about-crew:hover .about-crew__more,
  .page-about .about-crew:focus-within .about-crew__more {
    max-height: 260px;
    opacity: 1;
  }
}

@media (min-width: 960px) {
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .about-tl__item {
    display: grid;
    grid-template-columns: minmax(140px, 180px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 40px);
    padding-left: 46px;
  }

  .page-about .about-tl::before {
    left: 20px;
  }

  .page-about .about-tl__item::before {
    left: 14px;
    top: 10px;
  }

  .page-about .about-tl__year {
    font-size: clamp(36px, 4.2vw, 48px);
    margin-bottom: 0;
    padding-top: 2px;
    flex-wrap: wrap;
  }

  .page-about .about-tl__year em {
    font-size: 13px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-flow__media {
    margin-top: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<END>>>