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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--umi-header-h) + 40px) 0 56px;
  background: linear-gradient(180deg, var(--umi-white) 0%, var(--umi-cream) 82%);
  border-bottom: 1px solid var(--umi-line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(20, 24, 28, .045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 24, 28, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: 28px;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--umi-sans);
  font-weight: 800;
  font-size: clamp(34px, 6.2vw, 80px);
  line-height: 1.06;
  letter-spacing: -.02em;
}

.page-about .about-hero__accent {
  color: var(--umi-orange);
}

.page-about .about-hero__lead {
  margin: 24px 0 0;
  max-width: 760px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--umi-graphite);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--umi-line);
  border: 1px solid var(--umi-line);
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 20px;
  background: var(--umi-white);
}

.page-about .about-hero__figure {
  font-family: var(--umi-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--umi-ink);
}

.page-about .about-hero__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--umi-graphite);
  letter-spacing: .04em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  padding: 56px 0;
  background: var(--umi-cream);
  border-bottom: 1px solid var(--umi-line);
}

.page-about .about-chapter--mist {
  background: var(--umi-mist-soft);
}

.page-about .about-chapter--stages {
  background: var(--umi-cream);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .about-chapter__aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-num {
  display: inline-block;
  width: max-content;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--umi-orange);
  font-family: var(--umi-mono);
  font-size: clamp(46px, 8vw, 88px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.05em;
  color: var(--umi-ink);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--umi-sans);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.3;
  letter-spacing: -.01em;
}

.page-about .about-chapter__main {
  max-width: 840px;
}

.page-about .about-chapter__main p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--umi-ink);
}

.page-about .about-chapter__lede {
  font-family: var(--umi-serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--umi-ink);
}

.page-about .about-chapter__more {
  margin-top: 26px;
}

.page-about .about-link {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
  font-size: 15px;
  font-weight: 600;
  color: var(--umi-blue-deep);
  text-decoration: none;
  transition: color var(--umi-ease), border-color var(--umi-ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--umi-orange);
}

/* ---------- 插图 ---------- */
.page-about .about-figure {
  margin: 32px 0 0;
  padding: 10px;
  background: var(--umi-white);
  border: 1px solid var(--umi-line);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--umi-mist);
}

.page-about .about-figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--umi-graphite);
}

/* ---------- 核验流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 28px 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--umi-line);
  border: 1px solid var(--umi-line);
}

.page-about .about-flow__step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px 20px;
  background: var(--umi-white);
  border-top: 3px solid transparent;
  transition: border-color var(--umi-ease), background var(--umi-ease);
}

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-within {
  border-top-color: var(--umi-orange);
  background: #FFF7F0;
}

.page-about .about-flow__num {
  font-family: var(--umi-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--umi-blue);
}

.page-about .about-flow__name {
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-flow__note {
  font-size: 13px;
  line-height: 1.65;
  color: var(--umi-graphite);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  list-style: none;
  margin: 28px 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-team__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--umi-white);
  border: 1px solid var(--umi-line);
  transition: border-color var(--umi-ease);
}

.page-about .about-team__item:hover {
  border-color: var(--umi-line-strong);
}

.page-about .about-team__value {
  font-family: var(--umi-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--umi-blue);
}

.page-about .about-team__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--umi-graphite);
}

/* ---------- 两版栏目镜像对照 ---------- */
.page-about .about-mirror {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 28px 0 0;
  background: var(--umi-line);
  border: 1px solid var(--umi-line);
}

.page-about .about-mirror__head {
  padding: 12px 14px;
  font-family: var(--umi-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-about .about-mirror__head--prev {
  background: var(--umi-mist);
  color: var(--umi-graphite);
}

.page-about .about-mirror__head--now {
  background: var(--umi-blue);
  color: var(--umi-white);
}

.page-about .about-mirror__cell {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 14px;
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-mirror__cell--prev {
  background: var(--umi-mist-soft);
  color: var(--umi-graphite);
}

.page-about .about-mirror__cell--now {
  background: var(--umi-blue-soft);
  color: var(--umi-ink);
}

.page-about .about-changes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0;
}

/* ---------- 节奏卡片 ---------- */
.page-about .about-rhythm {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 28px 0;
}

.page-about .about-rhythm__card {
  padding: 22px 22px 24px;
  background: var(--umi-white);
  border: 1px solid var(--umi-line);
  border-left: 4px solid var(--umi-line-strong);
}

.page-about .about-rhythm__card--now {
  border-left-color: var(--umi-orange);
}

.page-about .about-rhythm__tag {
  margin: 0;
  font-family: var(--umi-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--umi-blue);
}

.page-about .about-rhythm__title {
  margin: 10px 0 10px;
  font-family: var(--umi-sans);
  font-size: 19px;
  font-weight: 700;
}

.page-about .about-rhythm__card p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--umi-graphite);
}

.page-about .about-rhythm__card p.about-rhythm__tag {
  margin: 0;
}

/* ---------- 五阶段轴 ---------- */
.page-about .about-stages {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .about-stage {
  position: relative;
  margin-left: 10px;
  padding: 0 0 30px 32px;
  border-left: 1px solid var(--umi-line-strong);
}

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

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 5px;
  width: 11px;
  height: 11px;
  margin-left: -6px;
  background: var(--umi-cream);
  border: 2px solid var(--umi-graphite);
  transition: transform var(--umi-ease), background var(--umi-ease), border-color var(--umi-ease);
}

.page-about .about-stage:hover::before,
.page-about .about-stage:focus-within::before {
  transform: scale(1.45);
  background: var(--umi-orange);
  border-color: var(--umi-orange);
}

.page-about .about-stage__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--umi-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--umi-orange);
}

.page-about .about-stage__name {
  margin: 0 0 8px;
  font-family: var(--umi-serif);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-stage__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--umi-graphite);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  padding: 56px 0 64px;
  background: var(--umi-orange-soft);
  border-top: 1px solid var(--umi-line);
}

.page-about .about-cta__title {
  margin: 10px 0 16px;
  font-family: var(--umi-sans);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.22;
  letter-spacing: -.01em;
}

.page-about .about-cta__text {
  max-width: 720px;
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--umi-graphite);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--umi-header-h) + 64px) 0 72px;
  }

  .page-about .about-chapter {
    padding: 80px 0;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 56px;
  }

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

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

  .page-about .about-rhythm {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-figure--offset {
    width: calc(100% - 96px);
    margin-left: 96px;
  }

  .page-about .about-stages {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    margin-top: 48px;
  }

  .page-about .about-stage {
    margin-left: 0;
    padding: 30px 20px 0 0;
    border-left: 0;
    border-top: 1px solid var(--umi-line-strong);
  }

  .page-about .about-stage::before {
    left: 0;
    top: -6px;
    margin-left: 0;
  }

  .page-about .about-cta {
    padding: 72px 0 80px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-mirror__head {
    font-size: 13px;
  }

  .page-about .about-mirror__cell {
    font-size: 15px;
    padding: 16px 18px;
  }
}

@media (max-width: 480px) {
  .page-about .about-hero__figure {
    font-size: 24px;
  }

  .page-about .about-flow__step {
    padding: 16px 14px 18px;
  }

  .page-about .about-mirror__cell {
    padding: 12px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage::before,
  .page-about .about-flow__step,
  .page-about .about-team__item,
  .page-about .about-link {
    transition: none;
  }

  .page-about .about-stage:hover::before,
  .page-about .about-stage:focus-within::before {
    transform: none;
  }
}