.page-about {
  --about-grad: linear-gradient(168deg, #F4F0FF 0%, #FFFFFF 56%, #EDE3FF 100%);
  --about-ink-soft: #3D3550;
  --about-deep: rgba(234, 243, 240, 0.78);
}

/* ---------- 面包屑 ---------- */
.page-about .yh-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--muted);
}

.page-about .yh-breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.page-about .yh-breadcrumb li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--line-strong);
}

.page-about .yh-breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .yh-breadcrumb a:hover,
.page-about .yh-breadcrumb a:focus-visible {
  color: var(--purple);
  border-bottom-color: var(--purple);
}

.page-about .yh-breadcrumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background: var(--about-grad);
  border-bottom: 1px solid var(--line);
  padding: 22px 0 54px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-hero__main h1 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-hero__lead {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

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

/* 右侧快速入口 */
.page-about .about-jump {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 16px 14px;
}

.page-about .about-jump__title {
  margin: 0 0 6px;
  padding-left: 8px;
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--muted);
}

.page-about .about-jump__item {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 8px;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: var(--ink);
  font-size: 0.9375rem;
  line-height: 1.6;
  transition: background 0.18s var(--ease), padding-left 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-jump__item:hover,
.page-about .about-jump__item:focus-visible {
  background: var(--lilac);
  padding-left: 14px;
  color: var(--purple);
}

.page-about .about-jump__num {
  flex: none;
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--blue);
  letter-spacing: 0.06em;
}

/* 关键数字 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px;
  padding: 20px 16px;
  background: var(--paper);
}

.page-about .about-stat__num {
  font-family: var(--mono);
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--purple);
  letter-spacing: -0.02em;
}

.page-about .about-stat__unit {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--purple-2);
}

.page-about .about-stat__label {
  flex: 1 0 100%;
  margin-top: 6px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 章节通用标题 ---------- */
.page-about .about-head {
  max-width: 46em;
  margin-bottom: 28px;
}

.page-about .about-head h2 {
  margin: 8px 0 0;
  font-size: clamp(1.5rem, 3.4vw, 2.2rem);
  line-height: 1.24;
  letter-spacing: -0.015em;
  font-weight: 900;
  color: var(--ink);
}

.page-about .about-head__sub {
  margin: 12px 0 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-head--light h2 {
  color: #FFFFFF;
}

.page-about .about-head--light .about-head__sub {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-head__eyebrow-light {
  color: var(--peach);
}

/* ---------- 分工切换 ---------- */
.page-about .about-roles {
  padding: 56px 0;
  background: var(--paper);
}

.page-about .about-roles__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-roles__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

.page-about .about-roles__tab {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-roles__tab:hover {
  background: var(--lilac);
  border-color: var(--purple-2);
}

.page-about .about-roles__count {
  font-family: var(--mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--muted);
}

.page-about #about-role-1:focus-visible ~ .about-roles__tabs .about-roles__tab[for="about-role-1"],
.page-about #about-role-2:focus-visible ~ .about-roles__tabs .about-roles__tab[for="about-role-2"],
.page-about #about-role-3:focus-visible ~ .about-roles__tabs .about-roles__tab[for="about-role-3"] {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about #about-role-1:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-1"],
.page-about #about-role-2:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-2"],
.page-about #about-role-3:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-3"] {
  background: var(--purple);
  border-color: var(--purple);
  color: #FFFFFF;
}

.page-about #about-role-1:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-1"] .about-roles__count,
.page-about #about-role-2:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-2"] .about-roles__count,
.page-about #about-role-3:checked ~ .about-roles__tabs .about-roles__tab[for="about-role-3"] .about-roles__count {
  color: #E3D4FF;
}

.page-about .about-roles__panel {
  display: none;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--purple-2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 22px 20px;
}

.page-about #about-role-1:checked ~ .about-roles__panels [data-role-panel="1"],
.page-about #about-role-2:checked ~ .about-roles__panels [data-role-panel="2"],
.page-about #about-role-3:checked ~ .about-roles__panels [data-role-panel="3"] {
  display: block;
  animation: about-fade 0.18s var(--ease) both;
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-about .about-roles__panel h3 {
  margin: 0 0 10px;
  font-size: 1.1875rem;
  line-height: 1.4;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-roles__panel p {
  margin: 0 0 14px;
  font-size: 0.9688rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-roles__panel ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 1.1em;
}

.page-about .about-roles__panel li {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-roles__aside figure {
  margin: 0;
}

.page-about .about-roles__aside img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--lilac);
  object-fit: cover;
}

.page-about .about-roles__aside figcaption {
  margin-top: 12px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  padding: 56px 0 60px;
  background: radial-gradient(circle at 14% 0%, #1A5A52 0%, #123F3A 48%, #0E312D 100%);
  color: var(--about-deep);
}

.page-about .about-history__map {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-about .about-history__stages {
  display: grid;
  gap: 18px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-history__stage {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.page-about .about-history__era {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--peach);
}

.page-about .about-history__stage h3 {
  margin: 8px 0 10px;
  font-size: 1.125rem;
  font-weight: 800;
  color: #FFFFFF;
}

.page-about .about-history__stage p {
  margin: 0 0 12px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--about-deep);
}

.page-about .about-history__kept {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed rgba(255, 255, 255, 0.2);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--orange);
}

/* ---------- 发布流程 ---------- */
.page-about .about-flow {
  padding: 56px 0;
  background: linear-gradient(180deg, #FFFFFF 0%, var(--lilac) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-flow__map {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  object-fit: cover;
}

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

.page-about .about-flow__step {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 20px 18px 18px;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-flow__step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
  border-color: var(--line-strong);
}

.page-about .about-flow__num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1;
  color: var(--purple);
}

.page-about .about-flow__step h3 {
  margin: 12px 0 8px;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 服务体量 ---------- */
.page-about .about-scale {
  padding: 56px 0;
  background: var(--indigo);
  color: #E7EEF7;
}

.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-scale__grid > li {
  background: var(--indigo);
  padding: 22px 16px;
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.9rem, 4.4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.02em;
}

.page-about .about-scale__label {
  display: block;
  margin-top: 10px;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: rgba(231, 238, 247, 0.76);
}

.page-about .about-scale__note {
  margin: 26px 0 0;
  max-width: 46em;
  font-size: 0.9688rem;
  line-height: 1.85;
  color: rgba(231, 238, 247, 0.8);
}

.page-about .about-scale__note a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 240, 255, 0.5);
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-scale__note a:hover,
.page-about .about-scale__note a:focus-visible {
  color: #FFFFFF;
  border-bottom-color: #FFFFFF;
}

/* ---------- 生态与资质 ---------- */
.page-about .about-trust {
  padding: 56px 0 60px;
  background: var(--paper);
}

.page-about .about-trust__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-trust__card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
  padding: 22px 20px;
}

.page-about .about-trust__card--wine {
  border-left-color: var(--wine);
}

.page-about .about-trust__card h3 {
  margin: 0 0 10px;
  font-size: 1.125rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-trust__card p {
  margin: 0 0 12px;
  font-size: 0.9688rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-trust__meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: 28px;
  padding: 24px 20px;
  background: var(--lilac);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
}

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

/* ---------- 中等屏幕 ---------- */
@media (min-width: 760px) {
  .page-about .about-flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 26px 28px;
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 26px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-about .about-stat {
    padding: 24px 20px;
  }

  .page-about .about-roles__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-roles__panel {
    padding: 26px 26px 24px;
  }

  .page-about .about-history {
    padding: 64px 0 70px;
  }

  .page-about .about-history__stages {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    margin-top: 34px;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
  }

  .page-about .about-history__stage {
    background: transparent;
    border: 0;
    border-left: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 0;
    padding: 24px 20px 4px;
  }

  .page-about .about-history__stage:first-child {
    border-left: 0;
    padding-left: 0;
  }

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

  .page-about .about-flow {
    padding: 64px 0;
  }

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

  .page-about .about-scale {
    padding: 64px 0;
  }

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

  .page-about .about-scale__grid > li {
    padding: 28px 22px;
  }

  .page-about .about-trust {
    padding: 64px 0 68px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about #about-role-1:checked ~ .about-roles__panels [data-role-panel="1"],
  .page-about #about-role-2:checked ~ .about-roles__panels [data-role-panel="2"],
  .page-about #about-role-3:checked ~ .about-roles__panels [data-role-panel="3"] {
    animation: none;
  }

  .page-about .about-flow__step,
  .page-about .about-jump__item {
    transition: none;
  }

  .page-about .about-flow__step:hover {
    transform: none;
  }
}