.page-about {
  --about-index-w: 214px;
  --about-rule: rgba(201, 194, 182, 0.22);
  background: var(--ink-900);
  color: var(--white);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(44px, 7vw, 88px));
  padding-bottom: clamp(40px, 6vw, 72px);
  background:
    radial-gradient(1100px 520px at 80% 4%, rgba(57, 215, 230, 0.16), transparent 62%),
    radial-gradient(760px 440px at 8% 92%, rgba(227, 168, 59, 0.14), transparent 66%),
    var(--ink-950);
  border-bottom: 3px solid var(--amber);
}

.page-about .about-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4.5vw, 48px);
  align-items: start;
}

.page-about .about-crumbs {
  margin-bottom: 22px;
}

.page-about .about-eyebrow {
  color: var(--amber-soft);
  margin: 0 0 16px;
}

.page-about .about-hero-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.2rem, 6.2vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 22px;
  max-width: 15ch;
  color: var(--white);
}

.page-about .about-hero-lead {
  max-width: 54ch;
  margin: 0;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.8;
  color: var(--warm-300);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-hero-media {
  position: relative;
  margin: 0;
  border: 3px solid var(--line-strong);
  background: var(--ink-800);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    135deg,
    rgba(57, 215, 230, 0.09) 0 2px,
    transparent 2px 11px
  );
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-hero-media .media-caption {
  position: relative;
  z-index: 1;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--warm-300);
  border-top: 1px solid var(--about-rule);
  background: var(--ink-900);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin-top: clamp(32px, 5vw, 54px);
  padding-top: 22px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-hero-stats dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--warm-300);
  margin-bottom: 6px;
}

.page-about .about-hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1.1;
  color: var(--amber);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 84px);
}

.page-about .about-index {
  border-bottom: 2px solid var(--about-rule);
  padding-bottom: 20px;
}

.page-about .about-index-head {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-index-head::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--amber);
  box-shadow: 2px 2px 0 var(--ink-950);
}

.page-about .about-index-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 14px;
}

.page-about .about-index-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 7px 0 7px 8px;
  border-left: 2px solid transparent;
  text-decoration: none;
  color: var(--warm-300);
  font-size: 0.9rem;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-index-list a:hover,
.page-about .about-index-list a:focus-visible {
  color: var(--white);
  border-left-color: var(--cyan);
}

.page-about .about-index-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-index-note {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.9;
  letter-spacing: 0.03em;
  color: var(--slate);
}

/* ---------- 章节 ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-body > .about-section + .about-section {
  margin-top: clamp(44px, 6vw, 78px);
  padding-top: clamp(32px, 4vw, 52px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-sec-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-sec-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.65rem, 4.2vw, 3.1rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
  color: var(--white);
}

.page-about .about-sec-lead {
  max-width: 62ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--warm-300);
}

/* ---------- 服务范围 ---------- */
.page-about .about-scope-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(24px, 3.6vw, 36px);
}

.page-about .about-scope-card {
  border: 2px solid var(--line-strong);
  padding: 20px 18px;
  background: linear-gradient(180deg, rgba(22, 35, 61, 0.92), rgba(11, 18, 32, 0.92));
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-scope-card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .about-scope-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--amber-soft);
}

.page-about .about-scope-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--warm-300);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-about .about-tl-item {
  position: relative;
  border-left: 2px solid var(--about-rule);
  padding: 0 0 26px 24px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
}

.page-about .about-tl-item:first-child::before {
  background: var(--amber);
  border-color: var(--amber);
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-tl-ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-about .about-tl-item h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-tl-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--warm-300);
}

/* ---------- 图片块 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border: 2px solid var(--line-strong);
  background: var(--ink-800);
  box-shadow: 5px 5px 0 var(--ink-950);
  overflow: hidden;
}

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

.page-about .about-figure .media-caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--slate);
  border-top: 1px solid var(--about-rule);
  background: var(--ink-900);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(24px, 3.6vw, 36px);
}

.page-about .about-team-card {
  border: 2px solid var(--line-strong);
  background: var(--ink-800);
  box-shadow: 5px 5px 0 var(--ink-950);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-team-card:hover {
  transform: translate(-2px, -2px);
  border-color: var(--amber);
}

.page-about .about-team-card[open] {
  border-color: var(--cyan);
}

.page-about .about-team-card summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-team-card summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team-card summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-team-card[open] summary::after {
  content: "−";
  color: var(--cyan);
}

.page-about .about-team-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.2vw, 1.9rem);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-team-name {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-team-desc {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--warm-300);
  border-top: 1px dashed var(--about-rule);
  padding-top: 14px;
}

/* ---------- 合作 ---------- */
.page-about .about-partner-stats {
  list-style: none;
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-partner-stats li {
  border: 2px solid var(--about-rule);
  padding: 18px 14px;
  background: linear-gradient(180deg, rgba(22, 35, 61, 0.9), rgba(11, 18, 32, 0.9));
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-partner-num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-partner-label {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--warm-300);
}

.page-about .about-partner-text {
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--warm-300);
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
}

/* ---------- 品质 ---------- */
.page-about .about-mech {
  list-style: none;
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-mech li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--about-rule);
}

.page-about .about-mech li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-mech-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--ink-950);
  background: var(--amber);
  padding: 4px 7px;
  box-shadow: 2px 2px 0 var(--ink-950);
}

.page-about .about-mech h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-mech p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--warm-300);
}

.page-about .about-quote {
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: clamp(22px, 3.2vw, 34px);
  background: var(--paper);
  color: var(--ink-900);
  border-left: 6px solid var(--amber);
  box-shadow: var(--shadow-hard);
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.3vw, 1.45rem);
  line-height: 1.55;
  letter-spacing: 0.005em;
}

/* ---------- 去向 ---------- */
.page-about .about-next-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: clamp(24px, 3.6vw, 34px);
}

.page-about .about-next-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border: 2px solid var(--line-strong);
  background: var(--ink-800);
  text-decoration: none;
  color: var(--white);
  transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.page-about .about-next-link:hover,
.page-about .about-next-link:focus-visible {
  border-color: var(--amber);
  transform: translate(-3px, -3px);
  box-shadow: 5px 5px 0 var(--ink-950);
}

.page-about .about-next-kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-next-title {
  font-size: 1.02rem;
  font-weight: 600;
}

.page-about .about-next-desc {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--warm-300);
}

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

@media (min-width: 760px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-tl-item {
    border-left: 0;
    border-top: 2px solid var(--about-rule);
    padding: 30px 20px 0 0;
  }

  .page-about .about-tl-item::before {
    left: 0;
    top: -8px;
  }

  .page-about .about-tl-item:last-child {
    border-top-color: var(--about-rule);
  }

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

@media (min-width: 920px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }

  .page-about .about-hero-media {
    margin-top: 8px;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    align-self: start;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding: 0 0 0 18px;
  }

  .page-about .about-index-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .page-about .about-figure--narrow {
    max-width: 620px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-scope-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-scope-card:nth-child(even) {
    transform: translateY(14px);
  }

  .page-about .about-scope-card:nth-child(even):hover {
    transform: translateY(12px);
  }
}
<<<END>>>