.page-about {
  --about-rail: 236px;
  --about-body-text: #C7D5E4;
  --about-line: rgba(36, 67, 95, 0.9);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about a:focus-visible,
.page-about .about-tally__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(39, 225, 193, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-link:hover {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 0;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 560px;
  background:
    radial-gradient(58% 62% at 80% 10%, rgba(39, 225, 193, 0.16), transparent 70%),
    radial-gradient(46% 52% at 10% -4%, rgba(242, 184, 75, 0.11), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 7vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: clamp(1rem, 2.2vw, 1.1rem);
  line-height: 1.85;
  color: var(--about-body-text);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: clamp(26px, 5vw, 46px) auto 0;
  padding-left: 0;
  padding-right: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid var(--about-line);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-850));
}

.page-about .about-figure--hero img { aspect-ratio: 3 / 2; }
.page-about .about-figure--wide img { aspect-ratio: 2 / 1; }
.page-about .about-figure--square img { aspect-ratio: 10 / 7; }

.page-about .about-figure__cap {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 关键数字 ---------- */
.page-about .about-tally {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 5vw, 46px);
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: 16px;
  overflow: hidden;
}

.page-about .about-tally__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--ink-850);
  transition: background var(--dur) var(--ease);
}

.page-about .about-tally__item:hover,
.page-about .about-tally__item:focus-within {
  background: var(--ink-800);
}

.page-about .about-tally__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.7rem, 4.4vw, 2.6rem);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .about-tally__unit {
  font-size: 0.48em;
  margin-left: 3px;
  color: var(--amber);
}

.page-about .about-tally__label {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-tally__note {
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--muted);
  transition: opacity var(--dur) var(--ease);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-ledger {
  display: grid;
  gap: 32px;
  padding: clamp(36px, 6vw, 72px) 0 clamp(48px, 7vw, 92px);
}

.page-about .about-rail {
  border-top: 1px solid var(--about-line);
  padding-top: 18px;
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 10px 0;
  font-size: 0.92rem;
  color: var(--about-body-text);
  text-decoration: none;
  border-bottom: 1px solid rgba(36, 67, 95, 0.45);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-rail__link:hover {
  color: var(--cyan);
  padding-left: 6px;
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--amber);
  letter-spacing: 0.08em;
}

.page-about .about-rail__note {
  margin: 18px 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: clamp(28px, 4.4vw, 46px) 0;
  border-top: 1px solid var(--about-line);
}

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

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 16px;
}

.page-about .about-sec__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.6vw, 2.25rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-sec p {
  max-width: 66ch;
  margin: 0 0 16px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-body-text);
}

.page-about .about-sec__lead {
  font-size: clamp(1rem, 2vw, 1.08rem);
  color: var(--paper);
}

.page-about .about-note {
  margin-top: 18px !important;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 0.9rem !important;
  color: var(--muted) !important;
}

/* ---------- 三道工序 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 26px 0 22px;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-flow__step {
  position: relative;
  padding: 18px 16px 16px;
  border-radius: 14px;
  background: linear-gradient(160deg, rgba(16, 38, 61, 0.95), rgba(11, 27, 46, 0.9));
  border: 1px solid var(--about-line);
}

.page-about .about-flow__step::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(39, 225, 193, 0));
  opacity: 0.7;
}

.page-about .about-flow__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-about .about-flow__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.08rem;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--about-body-text);
}

.page-about .about-strip {
  margin: 0;
  padding: 16px 18px;
  border-radius: 12px;
  border-left: 3px solid var(--cyan);
  background: rgba(39, 225, 193, 0.07);
  font-size: 0.94rem !important;
  color: var(--paper) !important;
}

.page-about .about-strip strong {
  font-family: var(--font-mono);
  color: var(--amber);
  font-weight: 600;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 10px;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid var(--about-line);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 184, 75, 0.14);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .about-timeline__text {
  margin: 6px 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--about-body-text);
}

.page-about .about-timeline__text strong {
  display: block;
  color: var(--paper);
  font-weight: 600;
  margin-bottom: 2px;
}

/* ---------- 手册块 ---------- */
.page-about .about-handbook {
  margin: clamp(28px, 4.6vw, 44px) 0;
  padding: clamp(22px, 3.6vw, 38px);
  border-radius: 22px;
  border: 1px solid var(--about-line);
  background:
    radial-gradient(70% 90% at 100% 0%, rgba(39, 225, 193, 0.12), transparent 65%),
    radial-gradient(60% 80% at 0% 100%, rgba(242, 184, 75, 0.1), transparent 65%),
    var(--ink-850);
}

.page-about .about-handbook__title {
  margin: 10px 0 22px;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-handbook__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-handbook__item {
  padding-top: 14px;
  border-top: 1px solid rgba(36, 67, 95, 0.8);
}

.page-about .about-handbook__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-handbook__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.02rem;
  color: var(--paper);
}

.page-about .about-handbook__item p {
  margin: 0;
  max-width: 40ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-body-text);
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  display: grid;
  gap: 14px;
  margin: 24px 0 30px;
}

.page-about .about-crew__row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 8px 12px;
}

.page-about .about-crew__name {
  font-size: 0.94rem;
  color: var(--paper);
}

.page-about .about-crew__val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.02rem;
  color: var(--amber);
}

.page-about .about-crew__bar {
  grid-column: 1 / -1;
  display: block;
  height: 6px;
  border-radius: 4px;
  background: var(--ink-700);
  overflow: hidden;
}

.page-about .about-crew__fill {
  display: block;
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft));
}

.page-about .about-crew__row:nth-child(1) .about-crew__fill { width: 38%; }
.page-about .about-crew__row:nth-child(2) .about-crew__fill { width: 29%; }
.page-about .about-crew__row:nth-child(3) .about-crew__fill { width: 21%; }
.page-about .about-crew__row:nth-child(4) .about-crew__fill { width: 12%; }

.page-about .about-region {
  margin: 0 0 28px;
  padding: 20px 18px;
  border-radius: 16px;
  background: var(--ink-800);
  border: 1px solid var(--about-line);
}

.page-about .about-region__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--paper);
}

.page-about .about-region__mesh {
  height: 96px;
  border-radius: 12px;
  border: 1px solid rgba(36, 67, 95, 0.7);
  background-image: radial-gradient(circle, rgba(39, 225, 193, 0.55) 1.4px, transparent 1.7px);
  background-size: 18px 18px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
  margin-bottom: 14px;
}

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

.page-about .about-region__list li {
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(39, 225, 193, 0.35);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-region p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--about-body-text);
}

.page-about .about-partners {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 26px;
}

.page-about .about-partners__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 12px;
  background: var(--ink-850);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-partners__label {
  font-size: 0.76rem;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 服务 ---------- */
.page-about .about-service {
  list-style: none;
  margin: 22px 0 18px;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-service li {
  padding-left: 16px;
  border-left: 2px solid rgba(39, 225, 193, 0.4);
}

.page-about .about-service h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--paper);
}

.page-about .about-service p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--about-body-text);
}

/* ---------- 认可 ---------- */
.page-about .about-badges {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-badges li {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  background: rgba(16, 38, 61, 0.8);
  font-size: 0.8rem;
  color: var(--about-body-text);
}

.page-about .about-badges li:last-child {
  border-color: rgba(242, 184, 75, 0.45);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: 10px;
  padding-top: 28px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-next .eyebrow {
  margin-bottom: 12px;
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 14px 2px;
  border-bottom: 1px solid rgba(36, 67, 95, 0.6);
  color: var(--paper);
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.6;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-next__link:hover {
  color: var(--cyan);
  padding-left: 10px;
}

.page-about .about-next__arrow {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  color: var(--cyan);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-about .about-tally {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-handbook__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-service {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 820px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 26px 24px;
  }

  .page-about .about-timeline__item {
    padding-left: 0;
    padding-top: 20px;
    border-left: 0;
    border-top: 1px solid var(--about-line);
  }

  .page-about .about-timeline__dot {
    left: 0;
    top: -5px;
  }

  .page-about .about-tally__note {
    opacity: 0;
  }

  .page-about .about-tally__item:hover .about-tally__note,
  .page-about .about-tally__item:focus-within .about-tally__note {
    opacity: 1;
  }
}

/* ---------- 桌面：窄目录 + 宽正文 ---------- */
@media (min-width: 1000px) {
  .page-about .about-ledger {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 64px;
  }

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

  .page-about .about-figure--hero img {
    aspect-ratio: 16 / 9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-next__link,
  .page-about .about-tally__item,
  .page-about .about-tally__note {
    transition: none;
  }
}
<<<END>>>