.page-about {
  --about-section-pad: 56px;
  --about-section-pad-lg: 96px;
  background: var(--c-paper);
  color: var(--c-ink);
}
.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 品牌宣言 ---------- */
.page-about .brand-declaration {
  position: relative;
  background: linear-gradient(135deg, var(--c-space) 0%, var(--c-teal) 62%, var(--c-indigo) 100%);
  color: var(--c-white);
  overflow: hidden;
  padding: 32px 0 72px;
}
.page-about .brand-declaration-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .brand-declaration-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .brand-declaration-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 27, 61, 0.74) 0%, rgba(11, 27, 61, 0.24) 46%, rgba(20, 66, 76, 0.56) 100%);
}
.page-about .brand-declaration .container {
  position: relative;
  z-index: 1;
}
.page-about .brand-declaration .breadcrumb {
  margin: 0 0 44px;
  padding: 0;
}
.page-about .brand-declaration .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .brand-declaration .breadcrumb-item {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}
.page-about .brand-declaration .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(255, 255, 255, 0.36);
}
.page-about .brand-declaration .breadcrumb-item a {
  color: var(--c-lime);
  text-decoration: none;
}
.page-about .brand-declaration-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}
.page-about .brand-declaration-content .kicker {
  color: var(--c-lime);
}
.page-about .brand-declaration-content h1 {
  font-family: var(--font-heading);
  font-size: clamp(42px, 9vw, 72px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 16px 0 24px;
}
.page-about .brand-declaration-lead {
  max-width: 560px;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.86);
  margin-bottom: 32px;
}
.page-about .brand-declaration-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.page-about .brand-dashboard {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(192, 192, 200, 0.38);
  border-radius: var(--radius-card);
  padding: 6px 24px;
}
.page-about .brand-dashboard .panel-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(192, 192, 200, 0.18);
}
.page-about .brand-dashboard .panel-row:last-child {
  border-bottom: 0;
}
.page-about .brand-dashboard .data-label {
  color: rgba(255, 255, 255, 0.62);
}
.page-about .brand-dashboard .data-value {
  color: var(--c-lime);
  font-size: 18px;
}

/* ---------- 品牌理念 ---------- */
.page-about .brand-mission {
  padding: var(--about-section-pad) 0;
}
.page-about .brand-mission .section-head,
.page-about .brand-timeline .section-head,
.page-about .brand-team .section-head,
.page-about .brand-trust .section-head {
  margin-bottom: 40px;
}
.page-about .brand-mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .brand-mission-card {
  background: var(--c-white);
  border: 1px solid rgba(27, 27, 27, 0.08);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .brand-mission-card:hover {
  transform: translateY(-4px);
  border-color: var(--c-lime);
  box-shadow: var(--shadow-lift);
}
.page-about .brand-mission-card h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--c-space);
}
.page-about .brand-mission-card p {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(26, 26, 26, 0.72);
}

/* ---------- 发展历程时间轴 ---------- */
.page-about .brand-timeline {
  background: var(--c-white);
  padding: var(--about-section-pad) 0 72px;
}
.page-about .timeline-wrap {
  --tl-line-x: 14px;
  --tl-gap: 64px;
  position: relative;
  padding-left: var(--tl-gap);
  margin-top: 48px;
}
.page-about .timeline-line {
  position: absolute;
  left: calc(var(--tl-line-x) - 2px);
  top: 20px;
  bottom: 20px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(to bottom, var(--c-lime) 0%, rgba(0, 255, 135, 0.2) 100%);
}
.page-about .milestone {
  position: relative;
  margin-bottom: 28px;
}
.page-about .milestone-card {
  background: var(--c-teal);
  border: 1px solid transparent;
  border-radius: var(--radius-card);
  color: var(--c-white);
  outline: none;
  padding: 26px;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .milestone-card:hover,
.page-about .milestone-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--c-lime);
  box-shadow: var(--shadow-lift), 0 0 0 3px rgba(0, 255, 135, 0.18);
}
.page-about .milestone-card h3 {
  font-size: 24px;
  font-weight: 800;
  margin: 12px 0 12px;
}
.page-about .milestone-card p {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 18px;
}
.page-about .milestone-data {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  padding-top: 14px;
}
.page-about .milestone-data .data-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.62);
}
.page-about .milestone-data .data-value {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-lime);
}
.page-about .milestone-marker {
  position: absolute;
  left: calc(var(--tl-line-x) - var(--tl-gap) - 19px);
  top: 28px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--c-space);
  border: 2px solid var(--c-lime);
  color: var(--c-lime);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-about .timeline-outro {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 20px;
  padding: 24px;
  background: var(--c-paper);
  border: 1px solid rgba(27, 27, 27, 0.08);
  border-radius: var(--radius-card);
}
.page-about .timeline-outro-media img {
  width: 100%;
  border-radius: 14px;
}
.page-about .timeline-outro-copy .kicker {
  color: var(--c-orange);
}
.page-about .timeline-outro-copy h3 {
  font-size: 24px;
  font-weight: 800;
  color: var(--c-space);
  margin: 8px 0 12px;
}
.page-about .timeline-outro-copy p {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(26, 26, 26, 0.74);
}

/* ---------- 团队与价值观 ---------- */
.page-about .brand-team {
  padding: var(--about-section-pad) 0;
}
.page-about .brand-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.page-about .team-roles {
  display: grid;
  gap: 18px;
  margin-top: 32px;
}
.page-about .team-role {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background: var(--c-white);
  border: 1px solid rgba(27, 27, 27, 0.08);
  border-radius: 18px;
  padding: 22px;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}
.page-about .team-role:hover {
  transform: translateY(-3px);
  border-color: var(--c-lime);
  box-shadow: var(--shadow-lift);
}
.page-about .team-role-icon {
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  background: var(--c-space);
  border-radius: 14px;
  color: var(--c-lime);
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-about .team-role h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--c-space);
  margin-bottom: 6px;
}
.page-about .team-role p {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(26, 26, 26, 0.74);
}
.page-about .brand-team-visual img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-lift);
}
.page-about .brand-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 48px;
}
.page-about .value-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-indigo) 0%, var(--c-wine) 100%);
  border-radius: var(--radius-card);
  color: var(--c-white);
  padding: 28px;
}
.page-about .value-num {
  position: absolute;
  top: 18px;
  right: 22px;
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  color: rgba(255, 255, 255, 0.18);
}
.page-about .value-card h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 10px;
}
.page-about .value-card p {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
}

/* ---------- 数据可信度 ---------- */
.page-about .brand-trust {
  background: var(--c-space);
  color: var(--c-white);
  padding: var(--about-section-pad) 0;
}
.page-about .brand-trust .section-title {
  color: var(--c-white);
}
.page-about .brand-trust .section-lead {
  color: rgba(255, 255, 255, 0.72);
}
.page-about .brand-trust .section-kicker {
  color: var(--c-lime);
}
.page-about .brand-trust .section-index {
  -webkit-text-stroke-color: rgba(255, 255, 255, 0.4);
}
.page-about .trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 44px;
}
.page-about .trust-panel {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  padding: 28px;
}
.page-about .trust-panel h3 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--c-lime);
  margin-bottom: 10px;
}
.page-about .trust-panel p {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
}
.page-about .trust-cert {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  gap: 28px;
  margin-top: 28px;
  padding: 32px;
  background: linear-gradient(135deg, var(--c-indigo) 0%, var(--c-wine) 100%);
  border-radius: var(--radius-card);
}
.page-about .trust-cert-badge {
  display: grid;
  gap: 4px;
  place-items: center;
  width: 118px;
  height: 118px;
  border: 2px solid var(--c-lime);
  border-radius: 50%;
  background: var(--c-space);
  color: var(--c-lime);
  text-align: center;
}
.page-about .trust-cert-badge .mono {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-white);
}
.page-about .trust-cert-badge span:last-child {
  font-family: var(--font-mono);
  font-size: 12px;
}
.page-about .trust-cert-copy {
  text-align: center;
}
.page-about .trust-cert-copy h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 12px;
}
.page-about .trust-cert-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  margin-bottom: 12px;
}
.page-about .trust-cert-copy a {
  color: var(--c-lime);
  font-weight: 700;
  text-decoration: none;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 1024px) {
  .page-about {
    --about-section-pad: var(--about-section-pad-lg);
  }
  .page-about .brand-declaration {
    padding: 40px 0 96px;
  }
  .page-about .brand-declaration-inner {
    grid-template-columns: 1fr 360px;
    gap: 72px;
    align-items: center;
  }
  .page-about .brand-declaration-content h1 {
    font-size: 72px;
  }
  .page-about .brand-mission-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .timeline-wrap {
    --tl-gap: 0;
    padding-left: 0;
  }
  .page-about .timeline-line {
    left: 50%;
    transform: translateX(-50%);
  }
  .page-about .milestone {
    display: grid;
    grid-template-columns: 1fr 48px 1fr;
    gap: 48px;
    margin-bottom: 52px;
  }
  .page-about .milestone-card {
    grid-column: 1;
    grid-row: 1;
    margin: 0;
  }
  .page-about .milestone--right .milestone-card {
    grid-column: 3;
  }
  .page-about .milestone-marker {
    position: static;
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
    align-self: center;
  }
  .page-about .timeline-outro {
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 40px;
    padding: 32px;
  }

  .page-about .brand-team-grid {
    grid-template-columns: 1.7fr 1fr;
    gap: 64px;
    align-items: start;
  }
  .page-about .brand-values {
    grid-template-columns: repeat(3, 1fr);
    margin-top: 72px;
  }

  .page-about .trust-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .trust-cert {
    grid-template-columns: 200px 1fr;
    justify-items: stretch;
    gap: 40px;
    align-items: center;
    padding: 40px 48px;
  }
  .page-about .trust-cert-copy {
    text-align: left;
  }
}