/* ==========================================
   品牌档案页 · 杂志式长文排版
   作用域：.page-about
   ========================================== */

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

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

.page-about .media-frame {
  border-radius: calc(var(--radius) + 2px);
  overflow: hidden;
}

.page-about .media-frame img {
  width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about__hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 92vh;
  padding: 6.5rem 1.25rem 3rem;
  background: var(--color-deep);
  color: var(--color-cream);
  overflow: hidden;
}

.page-about__hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.page-about__hero-shade {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(circle at 82% 22%, rgba(212, 175, 55, 0.20), transparent 42%),
    linear-gradient(180deg, rgba(11, 59, 71, 0.86), rgba(11, 59, 71, 0.72) 55%, rgba(11, 59, 71, 0.96));
}

.page-about__hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .breadcrumb {
  margin: 0 0 2rem;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

.page-about .breadcrumb li + li::before {
  content: "—";
  color: rgba(244, 241, 230, 0.4);
  margin-right: 0.75rem;
}

.page-about .breadcrumb a {
  color: rgba(244, 241, 230, 0.8);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--color-gold);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-gold);
}

.page-about .eyebrow {
  margin: 0 0 0.6rem;
  color: var(--color-gold);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-about__hero-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  letter-spacing: 0.1em;
  line-height: 1.1;
  color: var(--color-gold);
  text-transform: uppercase;
}

.page-about__hero-declaration {
  display: block;
  margin-top: 0.7rem;
  font-size: clamp(3rem, 11vw, 6.8rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.02;
  color: var(--color-cream);
  text-transform: none;
  max-width: 8ch;
}

.page-about__hero-lead {
  max-width: 36rem;
  margin: 1.75rem 0 0;
  font-family: var(--font-body);
  font-size: 1.06rem;
  line-height: 1.85;
  color: rgba(244, 241, 230, 0.9);
}

.page-about__hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 2.5rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid rgba(244, 241, 230, 0.18);
  max-width: 34rem;
}

.page-about__stat {
  margin: 0;
}

.page-about__stat dd {
  margin: 0 0 0.2rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.2rem, 4.2vw, 2rem);
  line-height: 1.1;
  color: var(--color-gold);
  white-space: nowrap;
}

.page-about__stat dt {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: rgba(244, 241, 230, 0.78);
}

/* ---------- 主体网格与目录 ---------- */
.page-about__layout {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 3rem 1.25rem 4.5rem;
}

.page-about__toc {
  margin-bottom: 2.5rem;
  padding: 1.35rem 1.25rem;
  background: var(--color-mist);
  border-radius: var(--radius);
}

.page-about__toc-label {
  margin: 0 0 0.8rem;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-teal);
}

.page-about__toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about__toc-list a {
  display: inline-block;
  padding: 0.3rem 0;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-deep);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.page-about__toc-list a:hover {
  color: var(--color-teal);
  border-bottom-color: var(--color-gold);
}

.page-about__toc-cta {
  display: none;
  margin-top: 1.75rem;
}

/* ---------- 章节通用 ---------- */
.page-about__section {
  padding: 2.75rem 0;
  border-bottom: 1px solid var(--color-warm);
}

.page-about__section--commitment {
  border-bottom: none;
}

.page-about__section-head {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  margin-bottom: 2rem;
}

.page-about__section-index {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--color-gold);
  border-radius: 50%;
  background: var(--color-cream);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--color-teal);
}

.page-about__section-head h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.7rem, 4.5vw, 2.5rem);
  line-height: 1.18;
  color: var(--color-ink);
}

.page-about__section-intro {
  max-width: 46rem;
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-slate);
}

/* ---------- 品牌脉络 / 时间轴 ---------- */
.page-about__timeline {
  margin: 2.75rem 0 2rem;
}

.page-about__timeline-item {
  position: relative;
  padding-left: 1.75rem;
  padding-bottom: 1.5rem;
}

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: 0.375rem;
  top: 0.95rem;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-mist), rgba(220, 227, 225, 0.25));
}

.page-about__timeline-item:last-child::before {
  background: transparent;
}

.page-about__timeline-head {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  list-style: none;
  padding: 0;
}

.page-about__timeline-head::-webkit-details-marker {
  display: none;
}

.page-about__timeline-head::marker {
  content: none;
}

.page-about__timeline-dot {
  position: absolute;
  left: 0;
  top: 0.15rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

.page-about__timeline-year {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.25rem;
  color: var(--color-deep);
}

.page-about__timeline-body {
  padding-top: 0.5rem;
}

.page-about__timeline-body h3,
.page-about__timeline-body p {
  margin: 0 0 0.3rem;
}

.page-about__timeline-body h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-ink);
}

.page-about__timeline-body p {
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-slate);
}

.page-about__timeline-figure {
  margin: 2.5rem 0 0;
  background: var(--color-deep);
}

/* ---------- 数据管理原则 ---------- */
.page-about__principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}

.page-about__principles-list {
  display: grid;
  gap: 1rem;
  margin: 0 0 1.75rem;
  padding: 0;
  list-style: none;
}

.page-about__principle-item {
  position: relative;
  padding: 1.4rem 1.25rem 1.4rem 3.4rem;
  background: var(--color-cream);
  border: 1px solid rgba(26, 102, 99, 0.18);
  border-left: 4px solid var(--color-teal);
  border-radius: var(--radius);
}

.page-about__principle-num {
  position: absolute;
  top: 1.35rem;
  left: 1.1rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 0.85rem;
  color: var(--color-gold);
}

.page-about__principle-item h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-ink);
}

.page-about__principle-item p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-slate);
}

.page-about__principles-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 0;
}

.page-about__principles-meta > div {
  padding: 1rem 0.6rem;
  background: var(--color-deep);
  border-radius: var(--radius);
  text-align: center;
}

.page-about__principles-meta dt {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: rgba(244, 241, 230, 0.82);
}

.page-about__principles-meta dd {
  margin: 0 0 0.2rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.15rem, 3.5vw, 1.55rem);
  color: var(--color-gold);
  white-space: nowrap;
}

.page-about__principles-figure {
  margin: 0;
  align-self: center;
}

.page-about__principles-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

/* ---------- 团队与组织 ---------- */
.page-about__team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.15rem;
  margin-bottom: 1.75rem;
}

.page-about__team-card {
  padding: 1.6rem 1.4rem;
  background: var(--color-cream);
  border-top: 3px solid var(--color-gold);
  border-radius: var(--radius);
}

.page-about__team-card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-ink);
}

.page-about__team-card p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-slate);
}

.page-about__team-note {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.1rem;
  padding: 1.5rem;
  border-left: 4px solid var(--color-teal);
  background: var(--color-mist);
  border-radius: calc(var(--radius) + 2px);
}

.page-about__team-note p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--color-ink);
}

/* ---------- 服务承诺 ---------- */
.page-about__commitment {
  position: relative;
  margin: 2rem 0 0;
  padding: 2.5rem 1.75rem 1.75rem;
  border: 2px solid var(--color-gold);
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(135deg, rgba(244, 241, 230, 0.88), rgba(244, 241, 230, 0.45));
}

.page-about__commitment .page-about__section-index {
  position: absolute;
  top: -1.5rem;
  left: 1.25rem;
  background: var(--color-deep);
  color: var(--color-gold);
}

.page-about__commitment h2 {
  margin: 0 0 1rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  color: var(--color-deep);
}

.page-about__commitment-text {
  max-width: 44rem;
  margin: 0 0 1.75rem;
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.25rem);
  line-height: 1.65;
  color: var(--color-ink);
}

.page-about__commitment-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {

  .page-about__hero {
    min-height: 92vh;
    padding: 8rem 2rem 4.5rem;
  }

  .page-about__hero-declaration {
    max-width: 9ch;
  }

  .page-about__hero-lead {
    font-size: 1.15rem;
    max-width: 38rem;
  }

  .page-about__hero-stats {
    gap: 2rem;
    max-width: 36rem;
  }

  .page-about__layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 5rem;
    align-items: start;
    padding: 5rem 2rem 6rem;
  }

  .page-about__toc {
    grid-column: 2;
    grid-row: 1;
    width: 250px;
    padding: 0;
    margin: 0;
    background: transparent;
    border-radius: 0;
  }

  .page-about__toc-inner {
    position: sticky;
    top: 7.5rem;
    border-left: 2px solid var(--color-gold);
    padding-left: 1.5rem;
  }

  .page-about__toc-list {
    flex-direction: column;
    gap: 0.5rem;
  }

  .page-about__toc-cta {
    display: block;
  }

  .page-about__content {
    grid-column: 1;
    grid-row: 1;
    min-width: 0;
  }

  .page-about__section {
    padding: 3.75rem 0;
  }

  .page-about__section-head {
    gap: 1.75rem;
    margin-bottom: 2.5rem;
  }

  /* 横向时间轴 */
  .page-about__timeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 2rem;
    border-top: 2px solid var(--color-mist);
    padding-top: 1.5rem;
    margin: 3.5rem 0 2rem;
  }

  .page-about__timeline-item {
    display: block;
    padding: 0;
    margin: 0;
  }

  .page-about__timeline-item::before {
    display: none;
  }

  .page-about__timeline-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
    padding-top: 1.25rem;
  }

  .page-about__timeline-year {
    order: 2;
    font-size: 1.35rem;
  }

  .page-about__timeline-dot {
    position: absolute;
    top: -0.4rem;
    left: 0;
    width: 0.8rem;
    height: 0.8rem;
    box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.18);
  }

  .page-about__timeline-body {
    padding-top: 1rem;
  }

  /* 数据管理两栏 */
  .page-about__principles {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 3.5rem;
    align-items: center;
  }

  .page-about__principles-meta {
    gap: 1rem;
  }

  .page-about__team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about__team-card {
    padding: 1.9rem 1.75rem;
  }

  .page-about__commitment {
    padding: 3rem 2.5rem 2.25rem;
  }
}