/* ==========================================
   品牌概况页 · 页面专属样式
   作用域：.page-about
   ========================================== */
.page-about {
  background: var(--rice);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-intro {
  background: var(--deep-blue);
  color: var(--rice);
  padding: clamp(3rem, 6vw, 5.5rem) 0;
  position: relative;
  overflow: hidden;
}

.page-about .about-intro .breadcrumb {
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.page-about .about-intro .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 0;
  margin: 0;
}

.page-about .about-intro .breadcrumb li {
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .04em;
}

.page-about .about-intro .breadcrumb li + li::before {
  content: "/";
  margin-right: .5rem;
  color: rgba(255, 255, 255, .4);
}

.page-about .about-intro .breadcrumb a {
  color: rgba(255, 255, 255, .72);
  text-decoration: none;
  transition: color .3s var(--ease-out);
}

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

.page-about .about-intro .breadcrumb [aria-current="page"] {
  color: rgba(255, 255, 255, .45);
}

.page-about .about-intro-frame {
  position: relative;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 4.5rem);
  z-index: 1;
}

.page-about .about-intro-frame::before {
  content: "";
  position: absolute;
  inset: .65rem;
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: calc(var(--radius-lg) - .5rem);
  pointer-events: none;
}

.page-about .about-intro-frame::after {
  content: "";
  position: absolute;
  top: -.5rem;
  left: -.5rem;
  width: 2.2rem;
  height: 2.2rem;
  border-top: 2px solid var(--neon);
  border-left: 2px solid var(--neon);
  border-top-left-radius: var(--radius-lg);
  opacity: .85;
}

.page-about .about-intro-starfield {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .08em;
  margin-bottom: 1.75rem;
  position: relative;
  z-index: 1;
}

.page-about .about-intro-chapter {
  color: rgba(255, 255, 255, .55);
}

.page-about .about-intro-signal {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  color: rgba(255, 255, 255, .78);
}

.page-about .about-intro-signal i {
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(0, 255, 136, .18), 0 0 12px rgba(0, 255, 136, .6);
}

.page-about .about-intro h1 {
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 5.6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: .01em;
  margin: 1.25rem 0 1.75rem;
  position: relative;
  z-index: 1;
}

.page-about .about-intro-summary {
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, .72);
  max-width: 34em;
  margin: 0 0 2.25rem;
  position: relative;
  z-index: 1;
}

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

.page-about .about-intro-ruler {
  display: none;
}

/* ---------- 品牌缘起 ---------- */
.page-about .about-origin-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-origin-media {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-about .about-origin-media::after {
  content: "";
  position: absolute;
  top: .75rem;
  left: .75rem;
  width: 2rem;
  height: 2rem;
  border-top: 2px solid var(--terra);
  border-left: 2px solid var(--terra);
  border-top-left-radius: .5rem;
  z-index: 1;
  pointer-events: none;
}

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

.page-about .about-origin-content h2 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.3;
  margin: .75rem 0 1.25rem;
}

.page-about .about-origin-content p {
  font-size: .98rem;
  line-height: 1.85;
  color: var(--rock);
  margin-bottom: 1rem;
}

.page-about .about-origin-link {
  display: inline-block;
  font-family: var(--font-data);
  font-size: .85rem;
  font-weight: 700;
  color: var(--moss);
  text-decoration: none;
  letter-spacing: .03em;
  padding-bottom: .3rem;
  border-bottom: 2px solid transparent;
  transition: border-color .3s var(--ease-out), color .3s var(--ease-out);
}

.page-about .about-origin-link:hover {
  border-color: var(--moss);
  color: var(--terra);
}

.page-about .about-origin-link span {
  display: inline-block;
  transition: transform .3s var(--ease-out);
}

.page-about .about-origin-link:hover span {
  transform: translateX(.35rem);
}

/* ---------- 里程碑时间线 ---------- */
.page-about .about-milestones .section-head {
  margin-bottom: 2rem;
}

.page-about .about-timeline {
  position: relative;
  margin-top: 1rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 1.25rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--terra), var(--deep-blue), var(--neon));
  opacity: .28;
}

.page-about .about-timeline-item {
  position: relative;
  padding-left: 3.5rem;
  margin-bottom: 2.25rem;
}

.page-about .about-timeline-badge {
  position: absolute;
  left: 0;
  top: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--terra);
  color: var(--rice);
  border: 4px solid var(--rice);
  box-shadow: 0 0 0 2px var(--terra), 0 6px 18px rgba(184, 93, 62, .25);
  font-family: var(--font-data);
  font-size: .7rem;
  font-weight: 700;
  z-index: 1;
  transition: box-shadow .35s var(--ease-out), transform .35s var(--ease-out);
}

.page-about .about-timeline-item:hover .about-timeline-badge {
  box-shadow: 0 0 0 2px var(--neon), 0 0 18px rgba(0, 255, 136, .3);
  transform: scale(1.08);
}

.page-about .about-timeline-card {
  background: #fff;
  border: 1px solid var(--silver);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  transition: border-color .3s var(--ease-out), box-shadow .3s var(--ease-out), transform .3s var(--ease-out);
}

.page-about .about-timeline-item:hover .about-timeline-card {
  border-color: var(--moss);
  box-shadow: var(--shadow-float);
  transform: translateY(-3px);
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--rock);
  margin: 0 0 .5rem;
}

.page-about .about-timeline-card p {
  font-size: .92rem;
  line-height: 1.75;
  color: var(--rock);
  margin: 0;
}

.page-about .about-timeline-media {
  margin-top: 1rem;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

/* ---------- 数据与规模 ---------- */
.page-about .about-metrics-panel {
  background: var(--deep-blue);
  border-radius: var(--radius-lg);
  padding: clamp(2rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
}

.page-about .about-metrics-panel::before {
  content: "";
  position: absolute;
  right: -3rem;
  top: -3rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 255, 136, .14) 0%, transparent 65%);
  pointer-events: none;
}

.page-about .about-metrics-panel .section-head {
  margin-bottom: clamp(2rem, 4vw, 3rem);
  position: relative;
  z-index: 1;
}

.page-about .about-metrics-panel .eyebrow {
  color: var(--neon);
}

.page-about .about-metrics-panel h2 {
  color: var(--rice);
}

.page-about .about-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.page-about .about-metric-card {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  position: relative;
  overflow: hidden;
  transition: background .35s var(--ease-out), transform .35s var(--ease-out), border-color .35s var(--ease-out);
}

.page-about .about-metric-card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 0;
  border-radius: 999px;
  background: var(--neon);
  transition: width .45s var(--ease-out);
}

.page-about .about-metric-card:hover {
  background: rgba(255, 255, 255, .09);
  border-color: rgba(0, 255, 136, .35);
  transform: translateY(-4px);
}

.page-about .about-metric-card:hover::after {
  width: 100%;
}

.page-about .about-metric-value {
  font-family: var(--font-data);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--neon);
  letter-spacing: -.01em;
  transition: text-shadow .35s var(--ease-out);
}

.page-about .about-metric-card:hover .about-metric-value {
  text-shadow: 0 0 24px rgba(0, 255, 136, .35);
}

.page-about .about-metric-value em {
  font-style: normal;
  font-size: .6em;
  margin-left: .1em;
}

.page-about .about-metric-label {
  font-size: .88rem;
  color: rgba(255, 255, 255, .72);
  letter-spacing: .04em;
}

.page-about .about-metrics-note {
  margin: 2rem 0 0;
  font-size: .92rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, .62);
  max-width: 46em;
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding-top: 1.5rem;
  position: relative;
  z-index: 1;
}

/* ---------- 专业团队 ---------- */
.page-about .about-team-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-team-content h2 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  line-height: 1.3;
  margin: .75rem 0 1.25rem;
}

.page-about .about-team-content > p {
  font-size: .98rem;
  line-height: 1.85;
  color: var(--rock);
  margin-bottom: 1.5rem;
}

.page-about .about-team-roles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team-roles li {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--silver);
  font-size: .92rem;
  line-height: 1.65;
  color: var(--rock);
}

.page-about .about-team-roles li:first-child {
  border-top: 1px solid var(--silver);
}

.page-about .about-team-roles li span {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--moss);
  text-transform: uppercase;
}

.page-about .about-team-media {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

/* ---------- 资质与合作 ---------- */
.page-about .about-trust-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 2.5rem;
}

.page-about .about-trust-item.card {
  padding: 1.75rem;
  border: 1px solid var(--silver);
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), border-color .35s var(--ease-out);
}

.page-about .about-trust-item.card:hover {
  border-color: var(--moss);
  box-shadow: var(--shadow-float);
  transform: translateY(-4px);
}

.page-about .about-trust-item h3 {
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--rock);
  margin: 0 0 .65rem;
}

.page-about .about-trust-item p {
  font-size: .9rem;
  line-height: 1.75;
  color: var(--rock);
  margin: 0;
}

.page-about .about-trust-footer {
  margin-top: 2.5rem;
  padding: 1.75rem 2rem;
  background: var(--rock);
  color: var(--rice);
  border-radius: var(--radius-md);
  font-size: .95rem;
  line-height: 1.85;
}

.page-about .about-trust-footer p {
  margin: 0;
}

.page-about .about-trust-footer a {
  color: var(--neon);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}

.page-about .about-trust-footer a:hover {
  border-color: var(--neon);
}

/* ---------- 平板与桌面端 ---------- */
@media (min-width: 768px) {
  .page-about .about-intro-ruler {
    display: flex;
    position: absolute;
    right: 1rem;
    top: 2.5rem;
    bottom: 2.5rem;
    flex-direction: column;
    justify-content: space-between;
    font-family: var(--font-data);
    font-size: .62rem;
    color: rgba(255, 255, 255, .35);
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .18em;
    z-index: 2;
    pointer-events: none;
  }

  .page-about .about-timeline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 3rem;
    margin-top: 1.5rem;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .about-timeline-item {
    padding-left: 0;
    padding-right: 3rem;
    margin-bottom: 2.5rem;
  }

  .page-about .about-timeline-item:nth-child(odd) {
    grid-column: 1;
  }

  .page-about .about-timeline-item:nth-child(even) {
    grid-column: 2;
    padding-right: 0;
    padding-left: 3rem;
  }

  .page-about .about-timeline-badge {
    top: 1.5rem;
  }

  .page-about .about-timeline-item:nth-child(odd) .about-timeline-badge {
    left: auto;
    right: -2.75rem;
  }

  .page-about .about-timeline-item:nth-child(even) .about-timeline-badge {
    left: -2.75rem;
    right: auto;
  }

  .page-about .about-metrics-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
  }

  .page-about .about-metric-card {
    padding: 1.75rem 1.5rem;
  }

  .page-about .about-team-roles li {
    flex-direction: row;
    gap: 1rem;
    align-items: baseline;
  }

  .page-about .about-team-roles li span {
    min-width: 6em;
  }

  .page-about .about-trust-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-about .about-origin-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
  }

  .page-about .about-team-grid {
    grid-template-columns: 3fr 2fr;
    gap: 4rem;
  }

  .page-about .about-trust-footer {
    padding: 2rem 2.5rem;
  }
}