.page-about {
  --about-year-rail: 150px;
  --about-block-gap: 34px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: 22px 46px;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange-ink);
  margin: 0 0 14px;
}

.page-about .eyebrow .section-num {
  color: var(--orange);
  margin-right: 6px;
}

.page-about h1 {
  font-size: clamp(30px, 7.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink);
  margin: 0 0 20px;
  max-width: 20ch;
}

.page-about .about-hero .lead {
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 0 34px;
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: var(--cream);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-facts__num {
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--navy);
}

.page-about .about-facts__label {
  font-size: 13px;
  color: var(--ink-soft);
}

/* ---------- 左轨 + 正文 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 28px;
}

.page-about .year-rail {
  display: none;
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-year-rail) minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .year-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

.page-about .year-rail__cap {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .year-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 16px;
  border-left: 1px solid var(--line-soft);
}

.page-about .year-rail__item {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 0;
  font-size: 12px;
  color: var(--ink-soft);
}

.page-about .year-rail__item::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cream);
  border: 1px solid var(--line-soft);
  transform: translateY(-50%);
}

.page-about .year-rail__item.is-current {
  color: var(--orange-ink);
  font-weight: 700;
}

.page-about .year-rail__item.is-current::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.16);
}

.page-about .year-rail__year {
  font-size: 12px;
  color: var(--steel);
}

.page-about .year-rail__item.is-current .year-rail__year {
  color: var(--orange-ink);
}

.page-about .year-rail__note {
  font-size: 12px;
}

/* ---------- 章节 ---------- */
.page-about .about-block {
  padding-block: var(--about-block-gap);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-body > .about-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-block h2 {
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.26;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 22ch;
}

.page-about .about-block .prose p {
  max-width: 42em;
}

.page-about .about-text {
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
  max-width: 42em;
  margin: 0 0 24px;
}

/* ---------- 版本时间线 ---------- */
.page-about .vline {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .vline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--orange-soft) 52%, var(--teal) 100%);
}

.page-about .vline__item {
  position: relative;
  padding: 0 0 22px;
}

.page-about .vline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cream);
  border: 2px solid var(--orange);
}

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

.page-about .vline__item:last-child::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 43, 0.14);
}

.page-about .vline__title {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 6px;
}

.page-about .vline__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--orange-ink);
}

.page-about .vline__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.74;
  color: var(--ink-soft);
  max-width: 44em;
}

/* ---------- 图片 ---------- */
.page-about .figure {
  margin: 28px 0 0;
}

.page-about .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .figure__cap {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 片区（深色分区） ---------- */
.page-about .about-districts {
  background: var(--navy);
  color: var(--cream);
  padding-block: 54px;
}

.page-about .about-districts .eyebrow {
  color: var(--orange);
}

.page-about .about-districts h2 {
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cream);
  margin: 0 0 16px;
  max-width: 24ch;
}

.page-about .about-districts__lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 52ch;
  margin: 0 0 28px;
}

.page-about .district-tabs {
  margin: 0 0 30px;
}

.page-about .district-tabs .tabs__list {
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .district {
  display: grid;
  gap: 18px;
  padding-block: 22px;
  border-top: 1px solid var(--line-dark);
}

@media (min-width: 768px) {
  .page-about .district {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }
}

.page-about .district__stat {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .district__num {
  font-size: clamp(40px, 7vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .district__unit {
  font-size: 13px;
  color: var(--mist);
}

.page-about .district__desc {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--cream);
  max-width: 46em;
}

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

.page-about .about-districts .tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 13px;
  line-height: 1.5;
  border-radius: var(--radius);
  background: rgba(244, 239, 230, 0.07);
  border: 1px solid var(--line-dark);
  color: var(--cream);
}

.page-about .about-districts .tag--core {
  background: rgba(255, 106, 43, 0.18);
  border-color: rgba(255, 106, 43, 0.5);
  color: var(--orange-soft);
  font-weight: 700;
}

.page-about .figure--dark .figure__cap {
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 30px;
}

@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 46px;
    align-items: start;
  }
}

.page-about .roles {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .roles__item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) 60px;
  align-items: center;
  gap: 12px;
}

.page-about .roles__name {
  font-size: 14px;
  color: var(--ink);
  font-weight: 500;
}

.page-about .roles__bar {
  display: block;
  height: 8px;
  border-radius: 999px;
  background: var(--paper);
  overflow: hidden;
}

.page-about .roles__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-about .roles__item:nth-child(1) .roles__fill {
  width: 37%;
  background: linear-gradient(90deg, var(--orange), var(--orange-soft));
}

.page-about .roles__item:nth-child(2) .roles__fill {
  width: 25%;
  background: linear-gradient(90deg, var(--steel), var(--mist));
}

.page-about .roles__item:nth-child(3) .roles__fill {
  width: 30%;
  background: linear-gradient(90deg, var(--teal), #6fd3bd);
}

.page-about .roles__item:nth-child(4) .roles__fill {
  width: 9%;
  background: linear-gradient(90deg, var(--mist), var(--line-soft));
}

.page-about .roles__num {
  font-size: 14px;
  text-align: right;
  color: var(--ink-soft);
}

.page-about .review-steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .review-steps .tag {
  display: inline-block;
  padding: 5px 12px;
  font-size: 13px;
  border-radius: var(--radius);
}

/* ---------- 合作 ---------- */
.page-about .coop {
  display: grid;
  gap: 18px;
}

@media (min-width: 768px) {
  .page-about .coop {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

.page-about .coop__item {
  background: var(--cream);
  border: 1px solid var(--line-soft);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius);
  padding: 22px 20px;
}

.page-about .coop__num {
  display: block;
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--navy);
  margin-bottom: 10px;
}

.page-about .coop__title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  margin: 0 0 10px;
}

.page-about .coop__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--ink-soft);
}

/* ---------- 响应支持 ---------- */
.page-about .sla {
  display: grid;
  gap: 14px;
  margin-bottom: 8px;
}

@media (min-width: 768px) {
  .page-about .sla {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .sla__item {
  background: var(--paper);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .sla__num {
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange-ink);
}

.page-about .sla__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-contact {
  margin: 18px 0 0;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--steel);
  word-break: break-all;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .year-rail,
  .page-about .vline__item,
  .page-about .coop__item {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</｜｜DSML｜｜ parameter>