.page-about {
  --about-body: rgba(233, 239, 247, 0.8);
  --about-gap: clamp(56px, 8vw, 104px);
  --about-grid: 88px;
  --about-gold-soft: rgba(240, 194, 76, 0.16);
  color: var(--white);
}

.page-about .about-h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 4.6vw, 64px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 16em;
}

.page-about .about-lede {
  margin-top: 22px;
  color: var(--about-body);
  max-width: 36em;
}

/* ---------- 开篇 ---------- */
.page-about .about-intro {
  position: relative;
  padding: clamp(40px, 6vw, 84px) 0 clamp(40px, 6vw, 72px);
  overflow: hidden;
}

.page-about .about-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(138, 153, 184, 0.13) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 153, 184, 0.13) 1px, transparent 1px);
  background-size: var(--about-grid) var(--about-grid);
  -webkit-mask-image: linear-gradient(150deg, #000 0%, transparent 62%);
  mask-image: linear-gradient(150deg, #000 0%, transparent 62%);
}

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

.page-about .about-figures {
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  border-radius: 2px;
}

.page-about .about-figures__item {
  background: var(--ink);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-figures__num {
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-figures__label {
  font-size: 13px;
  color: var(--line);
  letter-spacing: 0.04em;
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  padding: var(--about-gap) 0;
  border-top: 1px solid var(--hair);
}

.page-about .chapter-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num heading"
    "note note";
  gap: 14px 18px;
  align-items: start;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .chapter-num {
  grid-area: num;
  align-self: center;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
  border: 1px solid var(--about-gold-soft);
  border-radius: 2px;
  padding: 4px 9px;
}

.page-about .chapter-heading {
  grid-area: heading;
  min-width: 0;
}

.page-about .chapter-kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--stone);
}

.page-about .chapter-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 60px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 14em;
}

.page-about .chapter-note {
  display: none;
  grid-area: note;
}

.page-about .chapter-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .prose p {
  margin: 0 0 1.15em;
  color: var(--about-body);
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

.page-about .prose a {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .prose a:hover {
  text-decoration-thickness: 2px;
}

/* ---------- 工序步骤轴 ---------- */
.page-about .steps {
  list-style: none;
  margin: 26px 0 30px;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--hair);
  counter-reset: step;
}

.page-about .steps__item {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 26px;
}

.page-about .steps__item:last-child {
  padding-bottom: 6px;
}

.page-about .steps__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
}

.page-about .steps__item:first-child::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 4px var(--about-gold-soft);
}

.page-about .steps__num {
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 0.1em;
  padding-top: 2px;
}

.page-about .steps__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.01em;
}

.page-about .steps__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-body);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  background: var(--ink-2);
  border: 1px solid var(--hair);
  border-radius: 14px 2px 14px 2px;
}

.page-about .about-figure__cap {
  margin: 12px 0 0;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--line);
}

.page-about .about-figure--wide {
  margin-top: 32px;
}

/* ---------- 更新节奏 ---------- */
.page-about .phases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.page-about .phase {
  background: var(--core);
  border-radius: 2px 12px 2px 12px;
  border-left: 2px solid var(--line);
  padding: 20px 18px 22px;
}

.page-about .phase--prep {
  border-left-color: var(--gold);
}

.page-about .phase--ship {
  border-left-color: var(--moss);
}

.page-about .phase--watch {
  border-left-color: var(--stone);
}

.page-about .phase__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--line);
}

.page-about .phase__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-about .phase__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body);
}

/* ---------- 团队角色 ---------- */
.page-about .roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 26px 0 28px;
}

.page-about .role {
  background: var(--ink-2);
  border: 1px solid var(--hair);
  border-radius: 12px 2px 12px 2px;
  padding: 18px 18px 20px;
  outline: none;
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .role:hover,
.page-about .role:focus-visible {
  border-color: var(--gold);
  transform: translateY(-2px);
}

.page-about .role__kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--line);
  transition: color 0.24s var(--ease);
}

.page-about .role:hover .role__kicker,
.page-about .role:focus-visible .role__kicker {
  color: var(--gold);
}

.page-about .role__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body);
}

/* ---------- 侧栏卡片 ---------- */
.page-about .chapter-side {
  display: grid;
  gap: 16px;
}

.page-about .side-card {
  background: var(--ink-2);
  border-left: 2px solid var(--gold);
  border-radius: 2px 12px 2px 12px;
  padding: 20px 18px 22px;
}

.page-about .side-card__label {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .side-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body);
}

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

.page-about .side-list li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--about-body);
  padding-left: 12px;
  position: relative;
}

.page-about .side-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--line);
}

.page-about .side-list .mono {
  color: var(--white);
}

.page-about .chapter-cta {
  margin: 24px 0 0;
}

/* ---------- 历程阶段带 ---------- */
.page-about .timeline {
  margin-top: 28px;
}

.page-about .timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .timeline__item {
  position: relative;
}

.page-about .stage {
  border-left: 1px solid var(--hair);
  padding: 0 0 22px 22px;
}

.page-about .timeline__item:last-child .stage {
  padding-bottom: 0;
}

.page-about .stage__head {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  list-style: none;
  padding: 2px 0;
}

.page-about .stage__head::-webkit-details-marker {
  display: none;
}

.page-about .stage__head::before {
  content: "";
  flex: 0 0 auto;
  order: -1;
  width: 9px;
  height: 9px;
  margin-left: -27px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--ink);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-about .stage[open] .stage__head::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 4px var(--about-gold-soft);
}

.page-about .stage__step {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--line);
}

.page-about .stage__name {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-about .stage__desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body);
  max-width: 30em;
}

/* ---------- 结尾 ---------- */
.page-about .chapter--end {
  padding-bottom: clamp(72px, 10vw, 128px);
}

.page-about .end-cta {
  background: linear-gradient(140deg, var(--ink-2) 0%, var(--core) 100%);
  border: 1px solid var(--hair);
  border-radius: 18px 2px 18px 2px;
  padding: clamp(26px, 4vw, 48px);
  position: relative;
  overflow: hidden;
}

.page-about .end-cta::after {
  content: "";
  position: absolute;
  right: -80px;
  top: -80px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(240, 194, 76, 0.18);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .end-cta__title {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .end-cta__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--about-body);
}

.page-about .end-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .roles .role:last-child {
    grid-column: 1 / -1;
  }
}

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

  .page-about .phases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .chapter-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .chapter-grid .about-figure {
    margin-top: 6px;
  }

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

  .page-about .roles .role:last-child {
    grid-column: auto;
  }

  .page-about .chapter--end .end-cta {
    margin-left: auto;
    margin-right: 0;
    max-width: 62%;
  }
}

@media (min-width: 1100px) {
  .page-about .chapter-head {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "num heading note";
    gap: 18px 26px;
  }

  .page-about .chapter-note {
    display: block;
    writing-mode: vertical-rl;
    font-size: 11px;
    letter-spacing: 0.34em;
    color: var(--line);
    border-left: 1px solid var(--hair);
    padding: 4px 0 4px 14px;
    max-height: 170px;
    align-self: start;
  }

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

  .page-about .timeline__item {
    border-top: 1px solid var(--hair);
    padding-right: 20px;
  }

  .page-about .teimeline__item:last-child {
    padding-right: 0;
  }

  .page-about .timeline__item:last-child {
    padding-right: 0;
  }

  .page-about .stage {
    border-left: 0;
    padding: 16px 0 0 0;
  }

  .page-about .stage__head {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .page-about .stage__head::before {
    position: absolute;
    top: -5px;
    left: 0;
    margin-left: 0;
  }

  .page-about .timeline__item:last-child .stage {
    padding-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role,
  .page-about .role__kicker,
  .page-about .stage__head::before {
    transition: none;
  }

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