.page-about {
  --about-shadow: 0 3px 14px rgba(13, 27, 42, 0.08);
  --about-shadow-hover: 0 8px 22px rgba(13, 27, 42, 0.14);
  --about-grid-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cpath d='M0 40 40 0' stroke='%23ffffff' stroke-opacity='0.055' stroke-width='1'/%3E%3C/svg%3E");
  --about-grid-mist: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32' viewBox='0 0 32 32'%3E%3Cpath d='M0 32 32 0' stroke='%230D1B2A' stroke-opacity='0.035' stroke-width='1'/%3E%3C/svg%3E");
}

.page-about :focus-visible {
  outline: 2px solid var(--hh-green);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-about-hero {
  position: relative;
  overflow: hidden;
  padding: 2.75rem 0 4rem;
  background-color: var(--hh-blue);
  background-image: var(--about-grid-dark);
  background-size: 40px 40px;
  color: var(--hh-white);
}

.page-about-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: -18%;
  right: -14%;
  width: 58%;
  height: 130%;
  background: linear-gradient(135deg, rgba(255, 127, 17, 0.2) 0%, rgba(255, 127, 17, 0) 68%);
  transform: rotate(11deg);
  pointer-events: none;
}

.page-about-hero::after {
  content: "";
  position: absolute;
  z-index: 2;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 3rem;
  background: var(--hh-fog);
  clip-path: polygon(0 100%, 0 42%, 100% 100%);
  pointer-events: none;
}

.page-about-hero .hh-container {
  position: relative;
  z-index: 1;
}

.page-about-hero .hh-page-index {
  display: inline-block;
  margin-bottom: 0.75rem;
  font-family: var(--hh-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--hh-green);
}

.page-about-hero .hh-page-title {
  margin: 0 0 1rem;
  color: var(--hh-white);
}

.page-about-hero-copy .hh-page-desc {
  max-width: 42rem;
  margin-bottom: 1.75rem;
  color: rgba(255, 255, 255, 0.85);
}

.page-about-hero-grid {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}

.page-about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about-hero-figure {
  position: relative;
  margin: 0;
}

.page-about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--hh-radius);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
}

.page-about-hero-badge {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: 0.5rem 0.875rem;
  background: var(--hh-orange);
  color: var(--hh-white);
  font-family: var(--hh-mono);
  font-size: 0.75rem;
  line-height: 1;
  letter-spacing: 0.06em;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.24);
}

/* ---------- 发展里程碑 ---------- */
.page-about-milestones {
  background-color: var(--hh-fog);
  background-image: var(--about-grid-mist);
  background-size: 32px 32px;
}

.page-about-timeline {
  position: relative;
  max-width: 54rem;
  margin: 2.25rem auto 0;
  padding: 0.5rem 0 0.25rem;
}

.page-about-timeline::before {
  content: "";
  position: absolute;
  top: 0.75rem;
  bottom: 0.75rem;
  left: calc(0.5rem - 1px);
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--hh-green) 0%,
    var(--hh-orange) 58%,
    var(--hh-edge) 100%
  );
  opacity: 0.8;
}

.page-about-milestone {
  display: flex;
  gap: 1.125rem;
  position: relative;
  margin-bottom: 1.5rem;
}

.page-about-milestone-marker {
  flex: 0 0 auto;
  position: relative;
  z-index: 1;
  width: 1rem;
  height: 1rem;
  margin-top: 1.625rem;
  border-radius: 50%;
  background: var(--hh-green);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.18), 0 0 0 1px var(--hh-blue);
}

.page-about-milestone-card {
  flex: 1 1 auto;
  min-width: 0;
  background: var(--hh-white);
  border: 1px solid var(--hh-edge);
  border-radius: var(--hh-radius);
  box-shadow: var(--about-shadow);
  padding: 1.25rem;
  transition: box-shadow var(--hh-ease), border-color var(--hh-ease), transform var(--hh-ease);
}

.page-about-milestone-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 127, 17, 0.55);
  box-shadow: var(--about-shadow-hover);
}

.page-about-milestone-card summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  list-style: none;
  cursor: pointer;
}

.page-about-milestone-card summary::-webkit-details-marker {
  display: none;
}

.page-about-milestone-card summary .hh-card-index {
  flex: 0 0 auto;
  font-family: var(--hh-mono);
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--hh-orange);
  background: rgba(255, 127, 17, 0.1);
  border-radius: 999px;
  padding: 0.3125rem 0.625rem;
  letter-spacing: 0.05em;
}

.page-about-milestone-card summary .hh-card-title {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.35;
}

.page-about-milestone-card summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--hh-mono);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
  color: var(--hh-orange);
}

.page-about-milestone-card[open] summary::after {
  content: "−";
}

.page-about-milestone-content {
  margin-top: 0.875rem;
  padding-top: 0.875rem;
  border-top: 1px dashed var(--hh-edge);
}

.page-about-milestone-content .hh-card-text {
  margin-bottom: 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--hh-gray);
}

.page-about-milestone-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ---------- 数据服务能力 ---------- */
.page-about-capability {
  background-color: var(--hh-blue);
  background-image: var(--about-grid-dark);
  background-size: 40px 40px;
}

.page-about-capability .hh-section-index,
.page-about-compliance .hh-section-index {
  color: var(--hh-green);
}

.page-about-capability .hh-section-title,
.page-about-compliance .hh-section-title {
  color: var(--hh-white);
}

.page-about-capability .hh-section-desc,
.page-about-compliance .hh-section-desc {
  color: rgba(255, 255, 255, 0.78);
}

.page-about-capability-grid {
  gap: 1rem;
  margin-top: 2rem;
}

.page-about-stat-block {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  min-height: 10.5rem;
  padding: 1.375rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-left: 3px solid var(--hh-orange);
  transition: background var(--hh-ease), border-color var(--hh-ease), transform var(--hh-ease);
}

.page-about-stat-block:hover {
  border-color: rgba(255, 127, 17, 0.7);
  border-left-color: var(--hh-green);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.page-about-stat-block .hh-tag {
  align-self: flex-start;
}

.page-about-stat-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.page-about-stat-num {
  font-family: var(--hh-mono);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 2.75rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--hh-yellow);
  word-break: break-word;
  animation: about-count-in 0.7s ease-out both;
}

.page-about-stat-unit {
  font-family: var(--hh-mono);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.68);
}

.page-about-stat-block .hh-card-text {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.72);
}

@keyframes about-count-in {
  from {
    opacity: 0;
    transform: translateY(0.625rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 团队与价值观 ---------- */
.page-about-team {
  background-color: var(--hh-white);
}

.page-about-team-grid {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}

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

.page-about-team-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 16rem;
  object-fit: cover;
  border-radius: var(--hh-radius);
}

.page-about-team-figure .hh-figure-caption {
  margin-top: 0.625rem;
}

.page-about-team-panel {
  display: flex;
}

.page-about-team-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1.75rem;
  background-color: var(--hh-blue);
  background-image: var(--about-grid-dark);
  background-size: 40px 40px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 3px solid var(--hh-orange);
  color: var(--hh-white);
}

.page-about-team-card .hh-card-index {
  font-family: var(--hh-mono);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--hh-green);
}

.page-about-team-card .hh-card-title {
  margin: 0.5rem 0 0.75rem;
  color: var(--hh-white);
}

.page-about-team-card .hh-card-text {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.75;
}

.page-about-roles {
  gap: 1rem;
  margin-top: 1.25rem;
}

.page-about-role {
  display: flex;
  flex-direction: column;
  padding: 1.375rem;
  background: var(--hh-fog);
  border: 1px solid var(--hh-edge);
  border-top: 2px solid var(--hh-green);
  border-radius: var(--hh-radius);
  transition: border-color var(--hh-ease), background var(--hh-ease), transform var(--hh-ease);
}

.page-about-role:hover {
  border-color: var(--hh-orange);
  border-top-color: var(--hh-orange);
  background: var(--hh-white);
  transform: translateY(-2px);
}

.page-about-role .hh-tag {
  display: inline-block;
  margin-bottom: 0.625rem;
}

.page-about-role .hh-card-title {
  margin: 0 0 0.375rem;
  font-size: 1rem;
}

.page-about-role .hh-card-text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--hh-gray);
}

/* ---------- 资质与合规 ---------- */
.page-about-compliance {
  background-color: var(--hh-blue-deep);
  background-image: var(--about-grid-dark);
  background-size: 40px 40px;
}

.page-about-compliance-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about-compliance-icp,
.page-about-compliance-center {
  padding: 1.375rem;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-top: 3px solid var(--hh-green);
  border-radius: var(--hh-radius);
}

.page-about-compliance-icp .hh-card-title,
.page-about-compliance-center .hh-card-title {
  margin: 0.875rem 0 0.5rem;
  color: var(--hh-white);
  font-size: 1.125rem;
}

.page-about-compliance-icp .hh-card-text,
.page-about-compliance-center .hh-card-text {
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about-icp-id {
  margin: 0.625rem 0;
  font-family: var(--hh-mono);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--hh-yellow);
}

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

.page-about-compliance-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 12rem;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--hh-radius);
}

.page-about-compliance-figure .hh-figure-caption {
  margin-top: 0.625rem;
}

/* ---------- 信任声明 ---------- */
.page-about-trust {
  position: relative;
  margin-top: 2rem;
  padding: 1.5rem 1.5rem 1.75rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--hh-radius);
  background: rgba(255, 255, 255, 0.04);
  text-align: center;
}

.page-about-trust-text {
  margin: 0 auto 1rem;
  max-width: 46rem;
  color: rgba(255, 255, 255, 0.86);
  line-height: 1.75;
}

.page-about-trust-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 48rem) {
  .page-about-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 2.5rem;
  }

  .page-about-team-grid {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: stretch;
  }

  .page-about-trust {
    padding: 1.75rem 2.5rem;
  }
}

@media (min-width: 64rem) {
  .page-about-hero {
    padding: 3.5rem 0 5rem;
  }

  .page-about-milestone-card {
    padding: 1.375rem 1.5rem;
  }

  .page-about-stat-block {
    padding: 1.5rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition: none !important;
  }
}