.page-about {
  --about-lead: 1.0625rem;
  --about-card-pad: clamp(0.95rem, 2.4vw, 1.25rem);
  position: relative;
  color: var(--text);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about h2 {
  font-size: clamp(1.5rem, 3.6vw, 2.35rem);
  line-height: 1.18;
  margin: 0 0 1rem;
}

.page-about h3 {
  font-size: 1.0625rem;
  line-height: 1.4;
  margin: 0 0 0.4rem;
}

.page-about p {
  margin: 0 0 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-crumb {
  padding-top: 1.1rem;
  padding-bottom: 0.2rem;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.2rem, 3.5vw, 2.4rem) 0 clamp(2.2rem, 5vw, 3.6rem);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(29, 68, 82, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29, 68, 82, 0.6) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(120% 95% at 14% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 95% at 14% 0%, #000 0%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__tag {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.26em;
  color: var(--muted);
}

.page-about .about-hero__tag::before {
  content: "";
  width: 2.4rem;
  height: 1px;
  background: var(--cyan);
}

.page-about h1 {
  font-size: clamp(1.9rem, 5vw, 3.3rem);
  line-height: 1.08;
  margin: 0 0 1.1rem;
  max-width: 22ch;
}

.page-about .about-hero__lead {
  max-width: 64ch;
  font-size: var(--about-lead);
  color: var(--silver);
}

.page-about .about-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 2rem 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

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

.page-about .about-stat {
  background: var(--ink);
  padding: 0.95rem 1rem 1.05rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-stat__num--silver {
  color: var(--silver);
}

.page-about .about-stat__label {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 通用档案行 ---------- */

.page-about .about-block {
  border-bottom: 1px solid rgba(29, 68, 82, 0.6);
}

.page-about .about-row {
  display: grid;
  gap: 1.1rem;
}

@media (min-width: 900px) {
  .page-about .about-row {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: 2.4rem;
  }
}

.page-about .about-margin {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.page-about .about-margin::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: var(--cyan);
  flex: 0 0 auto;
}

@media (min-width: 900px) {
  .page-about .about-margin {
    writing-mode: vertical-rl;
    align-items: flex-start;
    padding-top: 0.35rem;
    height: max-content;
  }

  .page-about .about-margin::before {
    width: 1px;
    height: 2rem;
  }
}

.page-about .about-block__lead {
  font-size: var(--about-lead);
  color: var(--silver);
  max-width: 66ch;
}

.page-about .about-facts {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-about .about-facts li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 0.5rem;
  height: 0.5rem;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-facts b {
  font-family: var(--font-mono);
  color: var(--text);
  font-weight: 700;
}

/* ---------- 版本轨道 ---------- */

.page-about .about-track {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
  counter-reset: vtrack;
}

@media (min-width: 1024px) {
  .page-about .about-track {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.7rem;
  }
}

.page-about .about-track__item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1rem 0.95rem 1.15rem;
  box-shadow: 3px 3px 0 rgba(4, 18, 26, 0.75);
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-track__item:hover,
.page-about .about-track__item:focus-within {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-track__ver {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  color: var(--ink);
  background: var(--cyan);
  padding: 0.18rem 0.5rem;
}

.page-about .about-track__item:last-child .about-track__ver {
  background: var(--orange);
}

.page-about .about-track__name {
  margin: 0.6rem 0 0.35rem;
  font-size: 1rem;
}

.page-about .about-track__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 图片框 ---------- */

.page-about .about-figure {
  position: relative;
  margin: 1.9rem 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 4px 4px 0 rgba(4, 18, 26, 0.7);
  overflow: hidden;
}

.page-about .about-figure--track {
  margin-top: 1.6rem;
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.92);
}

.page-about .about-figure__cap {
  display: block;
  padding: 0.7rem 0.9rem 0.8rem;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--ink);
}

.page-about .about-figure__stamp {
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--paper);
  padding: 0.2rem 0.5rem;
}

.page-about .about-figure--team,
.page-about .about-figure--verify {
  max-width: 640px;
}

/* ---------- 团队分工切换 ---------- */

.page-about .about-roles {
  position: relative;
  margin-top: 1.7rem;
}

.page-about .about-roles__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
  clip-path: inset(50%);
}

.page-about .about-roles__tabs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

@media (min-width: 768px) {
  .page-about .about-roles__tabs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-roles__tab {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.4;
  cursor: pointer;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-roles__tab:hover {
  border-color: var(--silver);
  color: var(--text);
}

.page-about .about-roles__tab-num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--silver);
}

.page-about #about-role-edit:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-edit"],
.page-about #about-role-data:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-data"],
.page-about #about-role-tech:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-tech"],
.page-about #about-role-care:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-care"] {
  background: var(--ink-deep);
  border-color: var(--cyan);
  color: var(--text);
  box-shadow: inset 0 -2px 0 var(--cyan);
}

.page-about #about-role-edit:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-edit"] .about-roles__tab-num,
.page-about #about-role-data:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-data"] .about-roles__tab-num,
.page-about #about-role-tech:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-tech"] .about-roles__tab-num,
.page-about #about-role-care:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-care"] .about-roles__tab-num {
  color: var(--cyan);
}

.page-about #about-role-edit:focus-visible ~ .about-roles__tabs .about-roles__tab[for="about-role-edit"],
.page-about #about-role-data:focus-visible ~ .about-roles__tabs .about-roles__tab[for="about-role-data"],
.page-about #about-role-tech:focus-visible ~ .about-roles__tabs .about-roles__tab[for="about-role-tech"],
.page-about #about-role-care:focus-visible ~ .about-roles__tabs .about-roles__tab[for="about-role-care"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-roles__panel {
  display: none;
  margin-top: 0.7rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--ink-deep);
}

.page-about .about-roles__panel p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-about #about-role-edit:checked ~ .about-roles__panels #about-panel-edit,
.page-about #about-role-data:checked ~ .about-roles__panels #about-panel-data,
.page-about #about-role-tech:checked ~ .about-roles__panels #about-panel-tech,
.page-about #about-role-care:checked ~ .about-roles__panels #about-panel-care {
  display: block;
}

/* ---------- 三道流程 ---------- */

.page-about .about-steps {
  list-style: none;
  margin: 1.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

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

.page-about .about-steps__item {
  display: flex;
  gap: 0.85rem;
  padding: var(--about-card-pad);
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
}

.page-about .about-steps__no {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--cyan);
  flex: 0 0 auto;
  padding-top: 0.1rem;
}

.page-about .about-steps__item p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 使用场景 ---------- */

.page-about .about-scenes {
  margin-top: 1.6rem;
  display: grid;
  gap: 0.8rem;
}

@media (min-width: 700px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-scene {
  padding: var(--about-card-pad);
  background: linear-gradient(160deg, var(--panel) 0%, var(--ink-deep) 100%);
  border: 1px solid var(--line);
}

.page-about .about-scene h3 {
  margin: 0.6rem 0 0.4rem;
  font-size: 1.0625rem;
}

.page-about .about-scene p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
}

.page-about .about-route {
  margin-top: 1.7rem;
  padding: 1rem 1.1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid var(--line);
  background: var(--ink-deep);
}

.page-about .about-route__label {
  margin: 0 0.4rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

/* ---------- 运营节奏 ---------- */

.page-about .about-rhythm {
  list-style: none;
  margin: 1.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 820px) {
  .page-about .about-rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-rhythm__item {
  background: var(--ink);
  padding: 1rem 1.1rem;
  display: grid;
  gap: 0.35rem;
}

.page-about .about-rhythm__cycle {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-rhythm__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-rhythm__item:last-child .about-rhythm__cycle {
  color: var(--orange);
}

/* ---------- 结尾行动区 ---------- */

.page-about .about-cta {
  padding: clamp(2.4rem, 6vw, 4rem) 0;
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(53, 240, 208, 0.12) 0%, transparent 60%),
    var(--ink-deep);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 1.4rem;
}

@media (min-width: 860px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.6fr) auto;
    align-items: center;
    gap: 2.4rem;
  }
}

.page-about .about-cta__text h2 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.4rem, 3.2vw, 2rem);
}

.page-about .about-cta__text p {
  margin: 0;
  max-width: 60ch;
  font-size: 0.9375rem;
  color: var(--silver);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

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

  .page-about .about-track__item:hover,
  .page-about .about-track__item:focus-within {
    transform: none;
  }
}
<<<END>>>