.page-about {
  --aside-w: 132px;
  --chapter-pad: 52px;
}

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

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 54px;
  background-color: var(--deep);
  background-image:
    radial-gradient(115% 90% at 90% 0%, rgba(200, 255, 61, 0.11), transparent 62%),
    repeating-linear-gradient(90deg, rgba(243, 241, 233, 0.045) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(243, 241, 233, 0.035) 0 1px, transparent 1px 88px);
  color: var(--paper);
}

.page-about .about-hero .breadcrumb {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: rgba(243, 241, 233, 0.62);
}

.page-about .about-hero .breadcrumb a {
  color: var(--signal);
  text-decoration: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  margin-top: 26px;
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  max-width: 16ch;
  font-size: clamp(1.95rem, 8vw, 3.6rem);
  font-weight: 900;
  line-height: 1.07;
  letter-spacing: -0.02em;
}

.page-about .about-hero .lead {
  margin: 18px 0 0;
  max-width: 40ch;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(243, 241, 233, 0.8);
}

.page-about .about-hero__panel {
  padding: 22px 22px 24px;
  border-left: 2px solid var(--signal);
}

.page-about .about-hero__panel-label {
  margin: 0 0 18px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.page-about .about-hero__facts {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
}

.page-about .about-hero__facts .stat {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 0 6px;
  padding-top: 12px;
  border-top: 1px solid rgba(243, 241, 233, 0.16);
}

.page-about .about-hero__facts .stat__value {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__facts .stat__unit {
  font-size: 0.74rem;
  color: rgba(243, 241, 233, 0.7);
}

.page-about .about-hero__facts .stat__label {
  grid-column: 1 / -1;
  margin-top: 6px;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: rgba(243, 241, 233, 0.55);
}

/* ===== 章节骨架与纵向时间轴 ===== */
.page-about .about-chapter {
  padding: var(--chapter-pad) 0;
}

.page-about .about-chapter__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-chapter__aside {
  position: relative;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 14px;
  padding-left: 26px;
}

.page-about .about-chapter__dot {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(180, 98, 60, 0.16);
}

.page-about .about-chapter__num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--stone);
  font-variant-numeric: tabular-nums;
}

.page-about .about-chapter__note {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.page-about .about-chapter__title {
  margin: 0 0 16px;
  font-size: clamp(1.45rem, 4.6vw, 2.15rem);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-about .about-chapter__body .prose {
  max-width: var(--measure);
  margin: 0 0 14px;
  line-height: 1.85;
}

.page-about .band--deep,
.page-about .band--charcoal {
  color: var(--paper);
}

.page-about .band--deep .prose,
.page-about .band--charcoal .prose {
  color: rgba(243, 241, 233, 0.82);
}

.page-about .band--deep .about-chapter__num,
.page-about .band--charcoal .about-chapter__num {
  -webkit-text-stroke-color: rgba(243, 241, 233, 0.45);
}

.page-about .band--deep .about-chapter__note,
.page-about .band--charcoal .about-chapter__note {
  color: rgba(243, 241, 233, 0.6);
}

/* ===== 01 行内数据条 ===== */
.page-about .about-inline-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 24px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px solid var(--hair);
  font-size: 0.82rem;
  color: var(--stone);
}

.page-about .about-inline-stats .num {
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--deep);
  font-variant-numeric: tabular-nums;
}

/* ===== 02 流程 ===== */
.page-about .about-figure {
  margin: 26px 0 30px;
  border-radius: 2px;
  overflow: hidden;
}

.page-about .about-flowlist {
  display: grid;
  gap: 18px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flowlist__item {
  padding: 20px 20px 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-left: 2px solid var(--signal);
  background: var(--glass);
}

.page-about .about-flowlist__idx {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-about .about-flowlist__item h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .about-flowlist__item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(243, 241, 233, 0.72);
}

.page-about .about-cadence {
  margin-top: 28px;
  padding: 20px 22px 22px;
  border-left: 2px solid var(--signal);
}

.page-about .about-cadence__label {
  margin: 0 0 16px;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--signal);
}

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

.page-about .about-cadence__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  font-size: 0.86rem;
  color: rgba(243, 241, 233, 0.82);
}

.page-about .about-cadence__time {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

/* ===== 03 版本演进 ===== */
.page-about .about-version-graphic {
  margin: 26px 0 10px;
}

.page-about .about-version-graphic img {
  width: 100%;
  border-radius: 2px;
  filter: saturate(0.92);
}

.page-about .about-version-tabs {
  margin-top: 22px;
}

.page-about .about-version-tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .about-version-tabs .tabs__panel {
  padding: 20px 0 4px;
  border-top: 1px solid var(--hair);
}

.page-about .about-version__title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 700;
}

/* ===== 04 团队 ===== */
.page-about .about-teams {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-teams__label {
  margin: 0 0 14px;
  padding-bottom: 10px;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--signal);
  border-bottom: 1px solid var(--hair-light);
}

.page-about .about-roles {
  margin: 0;
  padding: 0;
}

.page-about .about-roles__row {
  display: grid;
  grid-template-columns: 5.2em minmax(0, 1fr);
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed rgba(243, 241, 233, 0.14);
}

.page-about .about-roles__row dt {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-roles__row dd {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(243, 241, 233, 0.72);
}

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

.page-about .about-posts li {
  position: relative;
  padding-left: 20px;
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(243, 241, 233, 0.72);
}

.page-about .about-posts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 9px;
  height: 1px;
  background: var(--signal);
}

/* ===== 05 合作生态 ===== */
.page-about .about-partners {
  display: grid;
  gap: 22px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partner {
  padding: 22px 20px 24px;
  background: rgba(47, 107, 79, 0.07);
  border-top: 3px solid var(--moss);
}

.page-about .about-partner__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--deep);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partner__title {
  margin: 12px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.78;
  color: #4A544F;
}

/* ===== 06 运营状态 ===== */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: rgba(243, 241, 233, 0.14);
}

.page-about .about-metric {
  padding: 20px 18px;
  background: var(--deep);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-metric__value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  font-variant-numeric: tabular-nums;
}

.page-about .about-metric__label {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(243, 241, 233, 0.66);
}

.page-about .about-track-note {
  max-width: var(--measure);
  margin: 26px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--clay);
  font-size: 0.88rem;
  line-height: 1.85;
  color: rgba(243, 241, 233, 0.78);
}

/* ===== 07 下一步 ===== */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-about .about-cta__col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 24px 22px;
  background: rgba(47, 107, 79, 0.05);
  border: 1px solid var(--hair);
  border-left: 3px solid var(--moss);
}

.page-about .about-cta__col h3 {
  margin: 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.page-about .about-cta__col p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--stone);
}

.page-about .about-cta__col .btn {
  margin-top: 6px;
}

.page-about .about-next-links {
  margin: 28px 0 0;
  font-size: 0.85rem;
  line-height: 1.95;
  color: var(--stone);
}

/* ===== 桌面端 ===== */
@media (min-width: 760px) {
  .page-about .about-flowlist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }

  .page-about .about-cta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

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

@media (min-width: 820px) {
  .page-about .about-teams {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    padding: 76px 0;
  }

  .page-about .about-chapter__inner {
    grid-template-columns: var(--aside-w) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-chapter__aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding-left: 30px;
  }

  .page-about .about-chapter__dot {
    left: 0;
    top: 4px;
    transform: none;
  }

  .page-about .about-chapter__aside::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 24px;
    bottom: -96px;
    width: 1px;
    background: linear-gradient(180deg, rgba(180, 98, 60, 0.55), rgba(180, 98, 60, 0));
  }

  .page-about .about-chapter--last .about-chapter__aside::before {
    display: none;
  }

  .page-about .about-chapter__num {
    font-size: 2.75rem;
  }

  .page-about .about-chapter__note {
    writing-mode: vertical-rl;
    letter-spacing: 0.18em;
  }

  .page-about .about-hero {
    padding: 44px 0 76px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 52px;
    align-items: end;
    margin-top: 36px;
  }

  .page-about .about-hero__panel {
    padding: 26px 26px 28px;
  }

  .page-about .about-hero__facts .stat__value {
    font-size: 1.85rem;
  }
}
<<<END>>>