.page-about {
  background: var(--ink-800);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(26px, 5vw, 52px) 0 clamp(38px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.38) brightness(0.4) contrast(1.06);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 46% at 82% 14%, rgba(39, 225, 210, 0.16), transparent 68%),
    radial-gradient(52% 52% at 8% 92%, rgba(255, 90, 31, 0.18), transparent 70%),
    linear-gradient(180deg, rgba(5, 8, 20, 0.22) 0%, rgba(10, 18, 48, 0.92) 82%, var(--ink-800) 100%);
}

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

.page-about .about-hero__eyebrow {
  margin: clamp(20px, 4vw, 36px) 0 0;
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.page-about .about-hero__title {
  margin: clamp(12px, 2vw, 22px) 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.5rem, 8.4vw, 6.6rem);
  line-height: 0.98;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-about .about-hero__lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 60ch;
  font-size: clamp(0.98rem, 1.6vw, 1.12rem);
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: clamp(28px, 4.5vw, 52px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-hero__fact-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-hero__fact:first-child .about-hero__fact-num {
  color: var(--orange);
}

.page-about .about-hero__unit {
  margin-left: 2px;
  font-size: 0.5em;
  color: var(--cyan);
}

.page-about .about-hero__fact-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 画布与目录 ---------- */
.page-about .about-canvas {
  padding-top: clamp(34px, 6vw, 72px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-canvas__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-toc {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 4px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms ease, border-color 120ms ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link[aria-current] {
  color: var(--paper);
}

.page-about .about-toc__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

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

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-top: clamp(28px, 4.6vw, 50px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-h) + 24px);
}

.page-about .about-main > .about-chapter:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-chapter + .about-chapter {
  margin-top: clamp(34px, 5.6vw, 64px);
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 20px);
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-chapter__idx {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(0.85rem, 1.6vw, 1.05rem);
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-chapter__title {
  margin: 0;
  color: var(--white);
}

.page-about .about-chapter__body > * + * {
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-prose p {
  max-width: 66ch;
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .about-prose .about-lead {
  max-width: 46ch;
  margin: 0 0 clamp(16px, 2.4vw, 22px);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.7;
  color: var(--paper);
}

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

.page-about .about-quote {
  max-width: 640px;
  margin: clamp(24px, 3.6vw, 38px) 0 0;
  padding-left: clamp(16px, 3vw, 26px);
  border-left: 2px solid var(--orange);
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.25rem, 2.9vw, 1.85rem);
  line-height: 1.45;
  letter-spacing: 0.01em;
  color: var(--paper);
}

/* ---------- 三条原则 ---------- */
.page-about .about-rules {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rule {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.6vw, 28px);
  align-items: start;
  padding: clamp(18px, 3vw, 28px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-rule:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-rule__mark {
  min-width: 1.2em;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.7rem, 5vw, 3.1rem);
  line-height: 0.88;
  color: rgba(39, 225, 210, 0.4);
}

.page-about .about-rule__title {
  margin: 0 0 8px;
  font-size: clamp(1rem, 2vw, 1.15rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.4;
  color: var(--white);
}

.page-about .about-rule__text p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(20px, 3.6vw, 34px);
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(24px, 3.6vw, 38px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 0.62em;
  left: calc(-1 * clamp(20px, 3.6vw, 34px) - 4px);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-800);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(39, 225, 210, 0.08);
}

.page-about .about-timeline__scale {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .about-timeline__item p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-timeline__scale {
  max-width: none;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__cell {
  background: var(--ink-800);
  padding: clamp(16px, 2.4vw, 24px);
}

.page-about .about-team__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-team__role {
  margin: 0 0 6px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-about .about-team__cell p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-shifts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-shifts li {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-shifts strong {
  color: var(--paper);
  font-weight: 700;
}

/* ---------- 图文容器 ---------- */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-900);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.55) contrast(1.03);
}

.page-about .about-figure figcaption {
  padding: 11px clamp(14px, 2vw, 18px);
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 站内指引 ---------- */
.page-about .about-links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 16px;
  padding: clamp(14px, 2.2vw, 20px) 0;
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  transition: padding-left 140ms ease, border-color 140ms ease;
}

.page-about .about-link:hover {
  padding-left: 8px;
  border-bottom-color: var(--orange);
}

.page-about .about-link__name {
  grid-column: 1;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-link__desc {
  grid-column: 1;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-link__arrow {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--orange);
}

/* ---------- 联系 ---------- */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-contact {
  margin-top: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line);
  padding-top: 4px;
}

.page-about .about-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 16px;
  margin: 0;
  padding: 10px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-contact__label {
  min-width: 48px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-contact__value {
  color: var(--paper);
  word-break: break-word;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 479px) {
  .page-about .about-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-about .about-rule {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .page-about .about-rule__mark {
    min-width: 0;
    text-align: left;
    font-size: 1.5rem;
  }

  .page-about .about-quote {
    max-width: 100%;
  }

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

  .page-about .about-link__arrow {
    grid-column: 1;
    grid-row: auto;
    align-self: start;
    margin-top: 4px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-canvas__grid {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-side {
    position: sticky;
    top: calc(var(--topbar-h) + 28px);
  }

  .page-about .about-toc__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-toc__link {
    display: flex;
    width: 100%;
    padding: 11px 0 11px 12px;
    border-bottom: 1px solid var(--line-soft);
    border-left: 2px solid transparent;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link[aria-current] {
    border-left-color: var(--orange);
  }
}
<<<END>>>