.page-about {
  background: var(--ink);
  color: var(--mist);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(20px, 4vw, 36px) 0 clamp(64px, 10vw, 132px);
  background: var(--ink);
}

.page-about .hero-media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-about .hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
}

.page-about .hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(102deg, rgba(11, 18, 16, 0.97) 0%, rgba(14, 42, 34, 0.9) 52%, rgba(11, 18, 16, 0.55) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -1px;
  height: clamp(44px, 8vw, 110px);
  background: var(--ink);
  clip-path: polygon(0 66%, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

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

.page-about .breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
  margin-bottom: clamp(20px, 4vw, 40px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

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

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

.page-about .breadcrumbs span:last-child {
  color: var(--lime);
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(18, 61, 49, 0.6);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .hero-title {
  margin: 20px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 7.4vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  max-width: 15ch;
  color: var(--mist);
}

.page-about .hero-title em {
  font-style: normal;
  color: var(--lime);
  display: inline-block;
}

.page-about .hero-lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--steel);
}

.page-about .hero-stats {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-width: 820px;
}

.page-about .hero-stats li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(18, 61, 49, 0.55);
  backdrop-filter: blur(2px);
}

.page-about .hero-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  color: var(--lime);
  line-height: 1.1;
}

.page-about .hero-stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 章节索引 ---------- */
.page-about .chapter-index {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .chapter-index .container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.page-about .chapter-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  color: var(--mist);
  text-decoration: none;
  font-size: 13.5px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .chapter-link span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
}

.page-about .chapter-link:hover,
.page-about .chapter-link:focus-visible {
  border-color: var(--lime);
  background: rgba(18, 61, 49, 0.8);
  color: var(--lime);
  outline: none;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(52px, 8vw, 104px) 0;
}

.page-about .about-section--field {
  background: linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-section--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .section-head {
  max-width: 780px;
}

.page-about .section-head .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 4.2vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-section--paper .section-title {
  color: var(--ink);
}

.page-about .about-section--paper .section-head .eyebrow {
  color: #B0490A;
}

.page-about .section-lede {
  margin: 16px 0 0;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--steel);
  max-width: 56ch;
}

.page-about .about-section--paper .section-lede {
  color: #3E5450;
}

/* ---------- 起点 ---------- */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .origin-copy p {
  margin: 0 0 18px;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.9;
  color: var(--mist);
  max-width: 62ch;
}

.page-about .origin-copy p:last-child {
  margin-bottom: 0;
  color: var(--steel);
}

.page-about .note-card {
  position: relative;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--field);
  align-self: start;
}

.page-about .note-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 4px;
  border-radius: var(--pill);
  background: var(--lime);
}

.page-about .note-label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .note-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .note-list li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
  padding-left: 0;
}

.page-about .note-list strong {
  display: inline-block;
  min-width: 3.6em;
  color: var(--mist);
  font-family: var(--font-display);
  font-weight: 800;
}

/* ---------- 留白引语 ---------- */
.page-about .about-pause {
  padding: clamp(56px, 11vw, 140px) 0;
  background: var(--ink);
  border-top: 1px solid var(--line);
}

.page-about .pause-inner {
  max-width: 900px;
  position: relative;
}

.page-about .pause-mark {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(60px, 12vw, 140px);
  line-height: 0.7;
  color: var(--orange);
  opacity: 0.75;
}

.page-about .pause-quote {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.6vw, 42px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .pause-sign {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

/* ---------- 内容工序 ---------- */
.page-about .craft-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .craft-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .craft-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(18, 61, 49, 0.45);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .craft-item:hover {
  border-color: var(--lime);
  transform: translateY(-2px);
}

.page-about .craft-no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background: var(--lime);
  border-radius: var(--pill);
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
}

.page-about .craft-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.35;
  color: var(--mist);
}

.page-about .craft-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--field);
}

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

.page-about .about-figure figcaption {
  padding: 12px 18px 14px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 时间轴 ---------- */
.page-about .track {
  list-style: none;
  margin: clamp(30px, 4vw, 52px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--field) 26%, var(--line) 100%);
}

.page-about .track-node {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 40px) 40px;
}

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

.page-about .track-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--field);
  box-shadow: 0 0 0 4px rgba(42, 71, 64, 0.4);
}

.page-about .track-node.is-now::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 5px rgba(182, 255, 59, 0.16);
}

.page-about .track-year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .track-node.is-now .track-year {
  color: var(--lime);
}

.page-about .track-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.25;
  color: var(--mist);
}

.page-about .track-text {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 团队 ---------- */
.page-about .crew-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .crew-card {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid rgba(11, 18, 16, 0.14);
  border-radius: var(--radius-lg);
  background: #FFFFFF;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .crew-card:hover,
.page-about .crew-card:focus-within {
  border-color: var(--field);
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(11, 18, 16, 0.12);
}

.page-about .crew-no {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--lime);
  border-radius: var(--pill);
  padding: 4px 12px;
}

.page-about .crew-name {
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.25;
  color: var(--ink);
}

.page-about .crew-text {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.8;
  color: #3E5450;
}

.page-about .crew-hand {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(11, 18, 16, 0.18);
  font-size: 13px;
  line-height: 1.7;
  color: #5C7268;
}

/* ---------- 服务标准 ---------- */
.page-about .standard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .standard-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(18, 61, 49, 0.5);
}

.page-about .standard-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(19px, 2.6vw, 26px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--lime);
}

.page-about .standard-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 1.9vw, 20px);
  line-height: 1.3;
  color: var(--mist);
}

.page-about .standard-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

.page-about .standard-foot {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap);
  margin-top: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-about .standard-note {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius-md);
  background: var(--ink-2);
}

.page-about .standard-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .standard-list li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .standard-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--lime);
  transform: rotate(45deg);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 9vw, 108px);
  background:
    linear-gradient(120deg, rgba(14, 42, 34, 0.95) 0%, rgba(11, 18, 16, 0.9) 65%),
    var(--ink);
  border-top: 1px solid var(--line);
}

.page-about .cta-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 36px);
  align-items: center;
}

.page-about .cta-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .cta-text {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .cta-actions .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 960px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(30px, 4vw, 60px);
  }

  .page-about .craft-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .track::before {
    left: 9px;
  }

  .page-about .track-node {
    padding-left: 56px;
  }

  .page-about .track-node::before {
    left: 2px;
  }

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

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

  .page-about .standard-foot {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(30px, 5vw, 64px);
  }

  .page-about .cta-actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .craft-item,
  .page-about .crew-card,
  .page-about .chapter-link,
  .page-about .breadcrumbs a {
    transition: none;
  }

  .page-about .craft-item:hover,
  .page-about .crew-card:hover,
  .page-about .crew-card:focus-within {
    transform: none;
  }
}
<<<END>>>