.page-about {
  --about-rail-w: 288px;
  --about-radius: 18px;
  --about-r-lg: 24px;
  position: relative;
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 背景装饰 ---------- */
.page-about .about-field {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.page-about .about-field-line {
  position: absolute;
  display: block;
  height: 1px;
}
.page-about .about-field-line--a {
  top: 9%;
  left: -12%;
  width: 72%;
  background: linear-gradient(90deg, transparent, rgba(110, 200, 255, 0.42), transparent);
  transform: rotate(-12deg);
}
.page-about .about-field-line--b {
  top: 54%;
  right: -16%;
  width: 84%;
  background: linear-gradient(90deg, transparent, rgba(184, 255, 61, 0.26), transparent);
  transform: rotate(9deg);
}
.page-about .about-field-glow {
  position: absolute;
  top: -150px;
  right: -140px;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(110, 200, 255, 0.16), transparent 68%);
}

.page-about .about-open,
.page-about .about-layout {
  position: relative;
  z-index: 1;
}

/* ---------- 首屏 ---------- */
.page-about .about-open {
  padding: clamp(28px, 6vw, 64px) 0 clamp(32px, 6vw, 68px);
}
.page-about .about-open-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-rail {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}
.page-about .about-rail-kicker {
  margin: 10px 0 16px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--ice);
  text-transform: uppercase;
}
.page-about .about-rail-figure {
  margin: 0;
  border-radius: var(--about-r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
  box-shadow: var(--shadow);
  clip-path: polygon(0 0, 100% 4%, 96% 100%, 3% 96%);
}
.page-about .about-rail-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}
.page-about .about-rail-note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.page-about .about-lead {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: clamp(0.98rem, 2.4vw, 1.1rem);
  line-height: 1.9;
  color: var(--gray);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  overflow: hidden;
}
.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px;
  background: linear-gradient(160deg, rgba(11, 20, 34, 0.95), rgba(5, 8, 15, 0.95));
}
.page-about .about-figure-num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 4.4vw, 1.9rem);
  font-weight: 700;
  color: var(--ice);
  line-height: 1;
}
.page-about .about-figure-label {
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--gray);
}

.page-about .about-open-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 正文骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(52px, 9vw, 120px);
}

.page-about .about-toc {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
.page-about .about-toc-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray);
}
.page-about .about-toc-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-toc-list a {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 0.82rem;
  color: var(--gray);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-about .about-toc-list a:hover,
.page-about .about-toc-list a:focus-visible {
  color: var(--paper);
  border-color: var(--ice);
}
.page-about .about-toc-list a[aria-current="true"] {
  color: var(--ink);
  background: var(--ice);
  border-color: var(--ice);
  font-weight: 700;
}
.page-about .about-toc-foot {
  margin: 16px 0 0;
  font-size: 0.8rem;
  color: var(--gray);
}
.page-about .about-toc-foot a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-about .about-body {
  display: flex;
  flex-direction: column;
  gap: clamp(44px, 7vw, 82px);
  min-width: 0;
}

.page-about .about-block {
  scroll-margin-top: 24px;
}
.page-about .about-block-head {
  margin-bottom: 22px;
}
.page-about .about-block-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 4.4vw, 2.05rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .about-block-lead {
  margin: 0 0 24px;
  max-width: 68ch;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--gray);
}
.page-about .about-prose p {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--gray);
}
.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-points {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.page-about .about-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-left: 2px solid var(--ice);
  background: linear-gradient(90deg, rgba(110, 200, 255, 0.09), rgba(110, 200, 255, 0));
  border-radius: 0 var(--about-radius) var(--about-radius) 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--paper);
}
.page-about .about-point-dot {
  flex: none;
  width: 7px;
  height: 7px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--lime);
}

/* ---------- 运营方法 ---------- */
.page-about .about-figure-wide {
  margin: 0 0 30px;
  border-radius: var(--about-r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
}
.page-about .about-figure-wide img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}
.page-about .about-figure-wide .media-caption {
  padding: 12px 16px;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--gray);
  background: var(--ink-2);
  border-top: 1px solid var(--line-soft);
}

.page-about .method-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-about .method-card {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  background: linear-gradient(155deg, rgba(18, 58, 69, 0.42), rgba(11, 20, 34, 0.86));
  transition: border-color 0.24s ease, transform 0.24s ease;
}
.page-about .method-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  width: 44px;
  height: 2px;
  background: linear-gradient(90deg, var(--ice), var(--lime));
}
.page-about .method-card:hover,
.page-about .method-card:focus-within {
  border-color: var(--ice);
  transform: translateY(-3px);
}
.page-about .method-title {
  margin: 12px 0 10px;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}
.page-about .method-text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--gray);
}
.page-about .method-more {
  margin: 12px 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--lime);
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.24s ease, max-height 0.28s ease;
}
.page-about .method-card:hover .method-more,
.page-about .method-card:focus-within .method-more {
  opacity: 1;
  max-height: 120px;
}

/* ---------- 版本演进 ---------- */
.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}
.page-about .filter-bar .chip {
  cursor: pointer;
  font-family: var(--font-body);
}
.page-about .filter-bar .chip[aria-pressed="true"] {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
  font-weight: 700;
}

.page-about .version-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .version-card {
  position: relative;
  padding: 24px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  background: var(--ink-2);
}
.page-about .version-card::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 20px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ice);
  box-shadow: 0 0 0 4px rgba(110, 200, 255, 0.14);
}
.page-about .version-card[data-tags*="订阅"]::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(184, 255, 61, 0.14);
}
.page-about .version-card[data-tags*="移动端"]::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 176, 32, 0.14);
}
.page-about .version-title {
  margin: 14px 0 10px;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--paper);
}
.page-about .version-text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.82;
  color: var(--gray);
}
.page-about .version-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.7;
  color: var(--ice);
}

/* ---------- 团队 ---------- */
.page-about .team-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}
.page-about .team-figure {
  margin: 0;
  border-radius: var(--about-r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
}
.page-about .team-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .team-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 30px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  overflow: hidden;
}
.page-about .team-role {
  padding: 20px 18px;
  background: linear-gradient(170deg, rgba(11, 20, 34, 0.96), rgba(5, 8, 15, 0.96));
}
.page-about .team-role-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--amber);
}
.page-about .team-role-title {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}
.page-about .team-role-text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--gray);
}

/* ---------- 覆盖与支持 ---------- */
.page-about .coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: start;
}
.page-about .coverage-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}
.page-about .coverage-list li {
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(110, 200, 255, 0.06);
  border: 1px solid var(--line-soft);
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--gray);
}
.page-about .coverage-list strong {
  color: var(--paper);
  font-weight: 700;
}

.page-about .coverage-card {
  padding: 24px 20px;
  border-radius: var(--about-r-lg);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-about .coverage-card-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--paper);
}
.page-about .coverage-card .contact-value a {
  color: var(--ice);
  text-decoration: none;
  word-break: break-all;
}
.page-about .coverage-card .contact-value a:hover {
  text-decoration: underline;
}
.page-about .coverage-card .btn {
  align-self: flex-start;
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next {
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.page-about .about-next-title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: clamp(1.1rem, 3.4vw, 1.4rem);
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-next-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-about .next-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--about-radius);
  text-decoration: none;
  background: linear-gradient(160deg, rgba(11, 20, 34, 0.92), rgba(5, 8, 15, 0.92));
  transition: border-color 0.22s ease, transform 0.22s ease;
}
.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--lime);
  transform: translateY(-3px);
}
.page-about .next-card-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--lime);
}
.page-about .next-card-text {
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--gray);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .method-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .version-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .team-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-open-grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }
  .page-about .about-rail {
    padding-left: 22px;
    position: sticky;
    top: 32px;
  }
  .page-about .about-rail-note {
    writing-mode: vertical-rl;
    position: absolute;
    right: -6px;
    bottom: 4px;
    margin: 0;
    letter-spacing: 0.22em;
  }

  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 78px);
    align-items: start;
  }
  .page-about .about-toc {
    position: sticky;
    top: 32px;
    border-top: none;
    border-left: 1px solid var(--line);
    padding: 4px 0 4px 20px;
  }
  .page-about .about-toc-list {
    flex-direction: column;
    gap: 8px;
  }
  .page-about .about-toc-list a {
    border-radius: 8px;
    padding: 8px 12px;
  }

  .page-about .version-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    position: relative;
  }
  .page-about .version-track::after {
    content: "";
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 1px;
    background: linear-gradient(90deg, var(--ice), rgba(184, 255, 61, 0.5), var(--amber));
    opacity: 0.5;
    pointer-events: none;
  }
  .page-about .version-card::before {
    top: -5px;
    z-index: 1;
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(24px, 3vw, 40px);
  }
  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(24px, 3vw, 40px);
  }
}

@media (min-width: 1180px) {
  .page-about .method-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .method-card,
  .page-about .next-card,
  .page-about .method-more {
    transition: none;
  }
}
<<<END>>>