/* ===== 品牌概况 - 页面专属样式 ===== */
.page-about {
  --about-gold-light: rgba(255, 193, 7, 0.14);
  --about-green-light: rgba(0, 230, 118, 0.12);
  --about-stroke: rgba(255, 255, 255, 0.14);
  --about-timeline-width: 2px;
  background-color: var(--color-surface);
}

/* ---- 页头 ---- */
.page-about__hero {
  background-color: var(--color-primary);
  background-image:
    radial-gradient(circle at 82% 18%, var(--about-green-light) 0%, transparent 44%),
    linear-gradient(135deg, transparent 0%, rgba(0, 230, 118, 0.05) 52%, transparent 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  padding: 44px 0 56px;
}
.page-about__hero::before {
  content: "";
  position: absolute;
  top: 18px;
  right: 12%;
  width: 200px;
  height: 200px;
  border: 1px solid var(--about-stroke);
  border-radius: 50%;
  pointer-events: none;
}
.page-about__hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(0, 230, 118, 0.16);
  border-radius: 50%;
  pointer-events: none;
}
.page-about__hero .container {
  position: relative;
  z-index: 1;
}
.page-about__hero .breadcrumb__link {
  color: rgba(255, 255, 255, 0.68);
}
.page-about__hero .breadcrumb__link:hover {
  color: var(--color-secondary);
}
.page-about__hero .breadcrumb__item,
.page-about__hero .breadcrumb__sep {
  color: rgba(255, 255, 255, 0.5);
}
.page-about__hero-inner {
  margin-top: 28px;
}
.page-about__hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.64);
  margin-bottom: 20px;
}
.page-about__hero-index {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 4px;
}
.page-about__hero-side {
  margin-left: auto;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.72);
}
.page-about__hero-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.08;
  margin: 0 0 18px;
  letter-spacing: 0.01em;
  color: #fff;
}
.page-about__hero-title-mark {
  display: block;
  font-size: 0.46em;
  font-weight: 400;
  color: var(--color-secondary);
  margin-top: 6px;
  letter-spacing: 0.02em;
}
.page-about__hero-desc {
  max-width: 680px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  margin: 0 0 24px;
}
.page-about__hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about__hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 999px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.92);
}

/* ---- 品牌使命 ---- */
.page-about__mission {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about__mission-grid {
  display: grid;
  gap: var(--space-5);
}
.page-about__lead {
  font-size: 22px;
  line-height: 1.6;
  font-weight: 700;
  color: var(--color-primary);
  border-left: 4px solid var(--color-secondary);
  padding-left: var(--space-3);
  margin-bottom: var(--space-4);
}
.page-about__mission-copy p {
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.page-about__mission-copy .page-about__note {
  margin-top: var(--space-4);
}
.page-about__note {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  padding: 14px 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}
.page-about__note-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 700;
  margin-bottom: 4px;
}
.page-about__mission-media {
  margin: 0;
}
.page-about__mission-img,
.page-about__milestones-img,
.page-about__team-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-about__figcap {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 10px;
  font-family: var(--font-mono);
}
.page-about__figcap-index {
  color: var(--color-secondary);
  background: var(--color-primary);
  padding: 2px 8px;
  border-radius: 3px;
  font-size: 12px;
}

/* ---- 发展里程碑 ---- */
.page-about__milestones {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about__section-desc {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin: 12px 0 0;
  max-width: 720px;
}
.page-about__milestones-wrap {
  margin-top: var(--space-5);
  display: grid;
  gap: var(--space-5);
}
.page-about__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
}
.page-about__timeline-line {
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: var(--about-timeline-width);
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  opacity: 0.2;
}
.page-about__timeline-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: var(--space-5);
}
.page-about__timeline-item:last-child {
  padding-bottom: 0;
}
.page-about__timeline-dot {
  position: absolute;
  left: 4px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 4px solid var(--color-primary);
  z-index: 1;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}
.page-about__timeline-dot--current {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 4px var(--about-green-light);
}
.page-about__timeline-item:hover .page-about__timeline-dot {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 6px var(--about-green-light);
  transform: scale(1.12);
}
.page-about__timeline-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.page-about__timeline-item:hover .page-about__timeline-card {
  border-color: var(--color-secondary);
  box-shadow: 0 8px 28px rgba(10, 31, 68, 0.1);
  transform: translateY(-2px);
}
.page-about__timeline-card--current {
  border-color: var(--color-secondary);
  background: linear-gradient(180deg, var(--about-green-light) 0%, var(--color-surface) 100%);
}
.page-about__timeline-version {
  font-family: var(--font-display);
  font-size: 26px;
  margin: 10px 0 2px;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}
.page-about__timeline-era {
  display: block;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  margin-bottom: 8px;
}
.page-about__timeline-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text);
}
.page-about__milestones-media {
  margin: 0;
}

/* ---- 资质与认证 ---- */
.page-about__cert {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
  color: rgba(255, 255, 255, 0.88);
}
.page-about__cert .section-head__title {
  color: #fff;
}
.page-about__cert .section-head__index {
  color: var(--color-secondary);
}
.page-about__cert-grid {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-5);
}
.page-about__cert-badge-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.page-about__cert-badge {
  width: 200px;
  height: 240px;
  perspective: 1000px;
  cursor: pointer;
}
.page-about__cert-badge-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
}
.page-about__cert-badge:hover .page-about__cert-badge-inner,
.page-about__cert-badge:focus-visible .page-about__cert-badge-inner {
  transform: rotateY(180deg);
}
.page-about__cert-badge-front,
.page-about__cert-badge-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  text-align: center;
}
.page-about__cert-badge-front {
  background:
    radial-gradient(circle at 30% 20%, var(--about-gold-light) 0%, transparent 50%),
    var(--color-primary-deep);
  border: 1px solid rgba(255, 193, 7, 0.5);
  box-shadow: 0 0 0 5px var(--about-gold-light), 0 18px 40px rgba(0, 0, 0, 0.4);
}
.page-about__cert-badge-front .status-dot--gold {
  margin-bottom: 10px;
}
.page-about__cert-badge-name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 4px;
}
.page-about__cert-badge-ver {
  font-family: var(--font-display);
  font-size: 52px;
  line-height: 1;
  color: var(--color-accent);
  text-shadow: 0 0 24px rgba(255, 193, 7, 0.32);
}
.page-about__cert-badge-sub {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.64);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  width: 100%;
}
.page-about__cert-badge-back {
  background: var(--color-surface);
  border: 1px solid var(--color-secondary);
  transform: rotateY(180deg);
  color: var(--color-text);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
}
.page-about__cert-badge-back p {
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  color: var(--color-text);
}
.page-about__cert-hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.08em;
  text-align: center;
  margin: 0;
}
.page-about__cert-list {
  display: grid;
  gap: 14px;
}
.page-about__cert-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 18px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}
.page-about__cert-item:hover {
  border-color: rgba(0, 230, 118, 0.5);
  background: rgba(255, 255, 255, 0.1);
}
.page-about__cert-item-no {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-secondary);
  line-height: 1.2;
}
.page-about__cert-item h3 {
  font-size: 18px;
  margin: 0 0 6px;
  color: #fff;
}
.page-about__cert-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

/* ---- 团队 ---- */
.page-about__team {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about__team-grid {
  display: grid;
  gap: var(--space-5);
  margin-top: var(--space-5);
}
.page-about__team-media {
  margin: 0;
}
.page-about__team-content p {
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}
.page-about__team-lead {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  border-left: 4px solid var(--color-accent);
  padding-left: var(--space-3);
}
.page-about__team-stats {
  display: flex;
  gap: var(--space-3);
  margin: var(--space-4) 0;
}
.page-about__team-stat {
  flex: 1;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px 16px;
  text-align: center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.page-about__team-stat:hover {
  border-color: var(--color-secondary);
  box-shadow: 0 6px 20px var(--about-green-light);
}
.page-about__team-stat .data-number {
  font-size: 44px;
  line-height: 1;
  display: block;
}
.page-about__team-stat-label {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text);
  margin-top: 8px;
}
.page-about__team-stat-sub {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ---- 合作生态 ---- */
.page-about__eco {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}
.page-about__eco-grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-5);
}
.page-about__eco-item {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 20px 20px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}
.page-about__eco-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 10px 30px rgba(10, 31, 68, 0.1);
  transform: translateY(-3px);
}
.page-about__eco-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-primary);
  color: var(--color-secondary);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 14px;
}
.page-about__eco-item h3 {
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--color-primary);
}
.page-about__eco-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-muted);
}

/* ---- 信任CTA ---- */
.page-about__cta {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
  color: rgba(255, 255, 255, 0.88);
}
.page-about__cta-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.page-about__cta-title {
  font-family: var(--font-display);
  font-size: 28px;
  color: #fff;
  margin: 0 0 10px;
}
.page-about__cta-desc {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  margin: 0;
  max-width: 620px;
}
.page-about__cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---- 桌面端布局 ---- */
@media (min-width: 768px) {
  .page-about__hero {
    padding: 56px 0 72px;
  }
  .page-about__hero-title {
    font-size: 56px;
  }
  .page-about__mission-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: var(--space-6);
  }
  .page-about__milestones-wrap {
    grid-template-columns: 1fr 0.85fr;
    align-items: start;
    gap: var(--space-6);
  }
  .page-about__cert-grid {
    grid-template-columns: 0.8fr 1.2fr;
    gap: var(--space-6);
  }
  .page-about__team-grid {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: center;
    gap: var(--space-6);
  }
  .page-about__eco-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
  .page-about__cta-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .page-about__cta-copy {
    flex: 1;
  }
  .page-about__cta-actions {
    flex-shrink: 0;
  }
}

@media (min-width: 1024px) {
  .page-about__eco-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}