/* ===== 品牌中心 / page-about ===== */
.page-about {
  --about-rail-w: 13.5rem;
  --about-inner: var(--shell-width);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-heading);
  color: var(--mist);
  letter-spacing: 0.01em;
}

.page-about h1 {
  font-size: clamp(2rem, 5.2vw, 3.35rem);
  line-height: 1.24;
  font-weight: 600;
  margin: 0.75rem 0 1.25rem;
}

.page-about h2 {
  font-size: clamp(1.55rem, 3.4vw, 2.3rem);
  line-height: 1.3;
  font-weight: 600;
  margin: 0.6rem 0 1.15rem;
  max-width: 22ch;
}

.page-about h3 {
  font-size: 1.1rem;
  line-height: 1.4;
  font-weight: 600;
  margin: 0.35rem 0 0.55rem;
}

.page-about p {
  margin: 0 0 1.1rem;
}

.page-about a {
  color: inherit;
}

/* ---------- 面包屑 ---------- */
.page-about .about-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  max-width: var(--about-inner);
  margin: 0 auto;
  padding: clamp(1.25rem, 3vw, 2rem) var(--shell-pad) 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-about .about-breadcrumb .breadcrumb__item {
  color: var(--text-dim);
  text-decoration: none;
}

.page-about .about-breadcrumb a.breadcrumb__item:hover,
.page-about .about-breadcrumb a.breadcrumb__item:focus-visible {
  color: var(--accent-soft);
}

.page-about .about-breadcrumb__sep {
  color: var(--blue-600);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  max-width: var(--about-inner);
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.5rem) var(--shell-pad) clamp(3rem, 7vw, 6rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(36rem, 88vw);
  height: min(36rem, 88vw);
  background: radial-gradient(circle at 42% 42%, rgba(212, 175, 55, 0.16), rgba(92, 138, 138, 0.08) 46%, transparent 68%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero__text {
  max-width: 40rem;
}

.page-about .about-hero__lede {
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  color: var(--text-soft);
  line-height: 1.9;
  margin-bottom: 1.75rem;
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  list-style: none;
  margin: 0 0 2rem;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-numeric);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--accent-soft);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.page-about .about-hero__visual {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(160deg, var(--blue-800), var(--blue-700));
  box-shadow: 0 30px 70px rgba(3, 10, 18, 0.55);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

.page-about .about-figcap {
  margin: 0;
  padding: 0.85rem 1.1rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 左右分置骨架 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  max-width: var(--about-inner);
  margin: 0 auto;
  padding: 0 var(--shell-pad) clamp(3rem, 8vw, 6rem);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
}

.page-about .about-rail__list a {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  padding: 0.5rem 0.7rem;
  border-left: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 0.88rem;
  text-decoration: none;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--accent-soft);
  border-left-color: var(--accent);
  background: rgba(212, 175, 55, 0.07);
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.page-about .about-rail__note {
  margin: 1.5rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--blue-700);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.8;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: clamp(2.25rem, 5vw, 3.75rem) 0;
  border-top: 1px solid rgba(27, 58, 87, 0.75);
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-prose {
  max-width: 46rem;
}

.page-about .about-prose p {
  color: var(--text-soft);
}

.page-about .about-lede {
  max-width: 44rem;
  color: var(--text-soft);
  font-size: 1.02rem;
}

.page-about .about-inline-link {
  color: var(--accent-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 175, 55, 0.45);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--accent);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 2rem 0 0;
  padding: 0 0 0 1.75rem;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 1rem;
  bottom: 1rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-500), rgba(27, 58, 87, 0.2));
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -1.61rem;
  top: 1.15rem;
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.13);
}

.page-about .about-tl {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.15rem 1rem;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-tl:hover {
  border-color: rgba(212, 175, 55, 0.5);
  transform: translateY(-2px);
}

.page-about .about-tl[open] {
  background: var(--bg-elevated);
}

.page-about .about-tl__head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.85rem;
  align-items: baseline;
  cursor: pointer;
  list-style: none;
  outline-offset: 4px;
}

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

.page-about .about-tl__head::marker {
  content: "";
}

.page-about .about-tl__ver {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.page-about .about-tl__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--mist);
}

.page-about .about-tl__desc {
  margin: 0.7rem 0 0.1rem;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 图文分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-media {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--blue-800);
  border: 1px solid var(--blue-700);
}

.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-media--wide img {
  aspect-ratio: 3 / 2;
}

.page-about .about-media--tall img {
  aspect-ratio: 3 / 2;
}

/* ---------- 方法论卡片 ---------- */
.page-about .about-cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-card {
  position: relative;
  padding: 1.5rem 1.35rem 1.4rem;
  background: linear-gradient(155deg, var(--blue-700), var(--blue-800) 78%);
  border: 1px solid var(--blue-600);
  border-radius: var(--radius-md);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.page-about .about-card:hover {
  transform: translateY(-4px);
  border-color: rgba(212, 175, 55, 0.45);
}

.page-about .about-card p:last-child {
  margin-bottom: 0;
  color: var(--text-soft);
  font-size: 0.94rem;
}

/* ---------- 八维度 ---------- */
.page-about .about-dims {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-dim {
  padding: 1.35rem 1.25rem 1.4rem;
  background: var(--bg-elevated);
  transition: background 0.3s var(--ease);
}

.page-about .about-dim:hover {
  background: var(--blue-700);
}

.page-about .about-dim__no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--jade);
}

.page-about .about-dim h3 {
  margin: 0.3rem 0 0.45rem;
}

.page-about .about-dim p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 入口卡片 ---------- */
.page-about .about-entries {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .about-entry {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.5rem 1.35rem;
  border: 1px solid var(--blue-600);
  border-radius: var(--radius-md);
  background: rgba(18, 43, 66, 0.55);
}

.page-about .about-entry h3 {
  margin: 0.3rem 0 0.5rem;
}

.page-about .about-entry p {
  color: var(--text-soft);
  font-size: 0.94rem;
}

.page-about .about-entry .btn {
  margin-top: auto;
}

.page-about .about-footnote {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--blue-700);
}

.page-about .about-footnote p {
  margin: 0;
  max-width: 40rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.page-about .about-totop {
  flex: none;
  display: inline-block;
  padding: 0.6rem 1.1rem;
  border: 1px solid var(--blue-600);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  color: var(--accent-soft);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-totop:hover,
.page-about .about-totop:focus-visible {
  border-color: var(--accent);
  background: rgba(212, 175, 55, 0.1);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-about .about-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 780px) {
  .page-about .about-dims {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-card:nth-child(2) {
    margin-top: 2.25rem;
  }

  .page-about .about-card:nth-child(3) {
    margin-top: 4.5rem;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-split--reverse .about-media {
    order: -1;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
    padding-top: clamp(2.5rem, 5vw, 4rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: 6rem;
    align-self: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

/* ---------- 大屏节奏 ---------- */
@media (min-width: 1140px) {
  .page-about .about-hero__visual {
    margin-left: 1.5rem;
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-card:hover,
  .page-about .about-tl:hover {
    transform: none;
  }
}
</｜｜DSML｜｜ parameter>
</invoke>
</result>