.page-about {
  --about-gap: clamp(48px, 8vw, 104px);
  background:
    radial-gradient(1100px 520px at 84% -10%, rgba(53, 240, 192, 0.10), transparent 62%),
    radial-gradient(760px 440px at 2% 14%, rgba(122, 92, 255, 0.08), transparent 60%),
    var(--ink);
  color: var(--cream);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: rgba(155, 176, 168, 0.55);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb li[aria-current="page"] {
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  padding: clamp(26px, 4.5vw, 52px) 0 clamp(24px, 4vw, 44px);
}

.page-about .about-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  padding: 7px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
}

.page-about h1 {
  margin: 22px 0 0;
  max-width: 15ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.2rem, 6.4vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 54ch;
  padding-left: clamp(16px, 2.4vw, 24px);
  border-left: 3px solid var(--cyan);
  font-size: clamp(0.98rem, 1.35vw, 1.1rem);
  line-height: 1.9;
  color: rgba(255, 248, 234, 0.82);
}

.page-about .about-facts {
  display: grid;
  align-content: end;
  border-top: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-fact-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.6vw, 1.75rem);
  line-height: 1;
  color: var(--cream);
  letter-spacing: -0.01em;
}

.page-about .about-fact-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mute);
}

.page-about .about-hero-figure {
  margin: 0 0 clamp(8px, 2vw, 18px);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: clamp(180px, 28vw, 340px);
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  filter: saturate(0.82);
}

.page-about .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
  color: var(--mute);
}

/* ---------- 正文与章节索引 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(30px, 5vw, 52px);
  padding: clamp(24px, 4vw, 40px) 0 var(--about-gap);
}

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

.page-about .about-toc-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mute);
}

.page-about .about-toc-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--r-sm);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--mute);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-toc-num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  opacity: 0.65;
}

.page-about .about-toc-link:hover,
.page-about .about-toc-link:focus-visible {
  color: var(--cream);
  background: rgba(53, 240, 192, 0.07);
}

.page-about .about-toc-link[aria-current="true"] {
  color: var(--cyan);
  background: rgba(53, 240, 192, 0.1);
  box-shadow: inset 2px 0 0 var(--cyan);
}

.page-about .about-toc-link[aria-current="true"] .about-toc-num {
  opacity: 1;
}

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

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 22px);
  padding: clamp(32px, 5.5vw, 58px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-about .about-sec-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-sec-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 5.6vw, 3.9rem);
  line-height: 0.9;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 2px var(--cyan);
  opacity: 0.5;
}

.page-about h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 3.6vw, 2.45rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about h3 {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.7vw, 1.12rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--cream);
}

.page-about .about-sec-lede {
  margin: clamp(14px, 2.4vw, 20px) 0 0;
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.3vw, 1.02rem);
  line-height: 1.9;
  color: rgba(255, 248, 234, 0.74);
}

.page-about .about-section p {
  margin: 0 0 10px;
  font-size: 0.95rem;
  line-height: 1.88;
  color: rgba(255, 248, 234, 0.72);
}

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

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl-item {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 0 0 clamp(22px, 3.6vw, 34px) 28px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .about-tl-item::after {
  content: "";
  position: absolute;
  left: -3.5px;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 192, 0.14);
}

.page-about .about-timeline > li:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline > li:last-child::before {
  background: linear-gradient(to bottom, var(--line), transparent);
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-tl-body p {
  margin: 0;
  max-width: 60ch;
}

.page-about .about-tl-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .about-tl-figure img {
  display: block;
  width: 100%;
  height: clamp(170px, 24vw, 280px);
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  filter: saturate(0.8);
}

/* ---------- 日常维护四条线 ---------- */
.page-about .about-lanes {
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lane {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 3vw, 26px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-lane:first-child {
  border-top: 1px solid var(--line);
}

.page-about .about-lane-title {
  margin: 0;
  color: var(--cyan);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.page-about .about-lane-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lane-meta li {
  padding: 5px 12px;
  border-radius: var(--r-pill);
  background: rgba(53, 240, 192, 0.08);
  border: 1px solid rgba(53, 240, 192, 0.18);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

/* ---------- 服务原则 ---------- */
.page-about .about-rules {
  display: grid;
  gap: clamp(16px, 2.6vw, 24px);
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: rule;
}

.page-about .about-rule {
  padding: 0 0 0 clamp(16px, 2.4vw, 22px);
  border-left: 2px solid rgba(53, 240, 192, 0.45);
}

.page-about .about-rule-index {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-rule h3 {
  margin-bottom: 8px;
}

/* ---------- 团队与协作 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: clamp(14px, 2.4vw, 22px);
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

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

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--mute);
}

.page-about .about-team {
  display: grid;
  gap: clamp(20px, 3.4vw, 32px);
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-team-figure {
  margin: 0;
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: clamp(180px, 30vw, 300px);
  object-fit: cover;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  filter: saturate(0.78);
}

/* ---------- 认可与下一步 ---------- */
.page-about .about-honor {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 14px;
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  padding: clamp(16px, 2.6vw, 24px) 0 clamp(16px, 2.6vw, 24px) clamp(16px, 2.6vw, 22px);
  border-left: 2px solid var(--amber);
}

.page-about .about-honor p {
  flex: 1 1 260px;
  margin: 0;
}

.page-about .about-next-title {
  margin: clamp(26px, 4vw, 38px) 0 10px;
  color: var(--cream);
}

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

.page-about .about-next li {
  position: relative;
  padding: 11px 0 11px 22px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.94rem;
  line-height: 1.85;
  color: rgba(255, 248, 234, 0.72);
}

.page-about .about-next li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 20px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(24px, 4vw, 36px);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 760px) {
  .page-about .about-tl-item {
    grid-template-columns: 88px minmax(0, 1fr);
    column-gap: 24px;
    padding-left: 32px;
  }

  .page-about .about-tl-item::after {
    top: 9px;
  }

  .page-about .about-lane {
    grid-template-columns: 148px minmax(0, 1fr);
    column-gap: 26px;
    align-items: start;
  }

  .page-about .about-lane-title {
    padding-top: 3px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    column-gap: clamp(40px, 6vw, 80px);
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-sec-head {
    flex-direction: row;
    align-items: baseline;
    gap: 18px;
  }

  .page-about .about-sec-num {
    flex: 0 0 auto;
    font-size: 3.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc-link,
  .page-about .breadcrumb a {
    transition: none;
  }
}
<<<END>>>