.page-about {
  --page-primary: #1A237E;
  --page-accent: #00E676;
  --page-gold: #FFD700;
  --page-surface: #0D1B2A;
  --page-on-surface: #E0E0E0;
  --page-glass-bg: rgba(26, 35, 126, 0.55);
  --page-glass-border: rgba(255, 255, 255, 0.06);
  --page-diagonal-angle: 165deg;
  --page-timeline-marker-size: 14px;
  --page-card-radius: 12px;
  --page-spacing-sm: 1rem;
  --page-spacing-md: 2rem;
  --page-spacing-lg: 4rem;
  --page-spacing-xl: 6rem;

  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--page-spacing-lg);
  padding: 0 0 var(--page-spacing-lg);
  color: var(--page-on-surface);
  background-color: var(--page-surface);
  overflow-x: hidden;
}

/* ── 对角线分割背景 ── */
.page-about__diagonal-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    var(--page-diagonal-angle),
    var(--page-primary) 0%,
    var(--page-primary) 35%,
    var(--page-surface) 35%,
    var(--page-surface) 100%
  );
  pointer-events: none;
  z-index: 0;
}

/* ── 面包屑 ── */
.page-about__breadcrumb {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: calc(var(--header-height, 56px) + 1rem);
  font-size: 0.85rem;
  color: rgba(224, 224, 224, 0.65);
  font-family: var(--font-body, Inter, sans-serif);
}

.page-about__breadcrumb-link {
  color: var(--page-accent);
  text-decoration: none;
  transition: color 0.25s;
}
.page-about__breadcrumb-link:hover {
  color: #fff;
  text-decoration: underline;
}

.page-about__breadcrumb-sep {
  color: rgba(224, 224, 224, 0.35);
}

.page-about__breadcrumb-current {
  color: var(--page-on-surface);
  font-weight: 500;
}

/* ── 首屏英雄区 ── */
.page-about__hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--page-spacing-md);
  padding-top: var(--page-spacing-md);
  align-items: center;
}

.page-about__hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--page-spacing-sm);
}

.page-about__hero-headline {
  font-family: var(--font-headline, Montserrat, sans-serif);
  font-weight: 900;
  font-size: clamp(2.2rem, 7vw, 3.8rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 0;
}

.page-about__hero-sub {
  font-family: var(--font-body, Inter, sans-serif);
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  line-height: 1.7;
  color: var(--page-on-surface);
  max-width: 70ch;
  margin: 0;
}

.page-about__hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--page-spacing-sm);
  margin-top: var(--page-spacing-sm);
}

.page-about__stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 1.5rem;
  background: var(--page-glass-bg);
  border: 1px solid var(--page-glass-border);
  border-radius: var(--page-card-radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-about__stat-num {
  font-family: var(--font-headline, Montserrat, sans-serif);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--page-accent);
}

.page-about__stat-label {
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 0.8rem;
  color: rgba(224, 224, 224, 0.7);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-about__hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  border-radius: var(--page-card-radius);
  background: var(--page-glass-bg);
  border: 1px solid var(--page-glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.page-about__hero-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
}

/* ── 品牌理念 ── */
.page-about__mission {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--page-spacing-md);
  padding-top: var(--page-spacing-sm);
}

.page-about__section-headline {
  font-family: var(--font-headline, Montserrat, sans-serif);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 900;
  color: #fff;
  margin: 0 0 var(--page-spacing-sm);
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
}

.page-about__section-headline::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--page-accent), var(--page-gold));
  margin-top: 0.5rem;
  border-radius: 2px;
}

.page-about__mission-content {
  display: flex;
  flex-direction: column;
  gap: var(--page-spacing-sm);
}

.page-about__mission-text {
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--page-on-surface);
  max-width: 75ch;
  margin: 0;
}

.page-about__mission-ps {
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(224, 224, 224, 0.75);
  font-style: italic;
  border-left: 3px solid var(--page-gold);
  padding-left: 1.2rem;
  margin: 0;
}

.page-about__mission-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about__mission-img {
  width: 100%;
  max-width: 400px;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  opacity: 0.9;
}

/* ── 服务承诺 ── */
.page-about__promises {
  position: relative;
  z-index: 1;
  padding-top: var(--page-spacing-sm);
}

.page-about__promises-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--page-spacing-md);
  margin-top: var(--page-spacing-sm);
}

.page-about__promise-card {
  padding: 1.8rem;
  border-radius: var(--page-card-radius);
  background: rgba(26, 35, 126, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  cursor: default;
}

.page-about__promise-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 230, 118, 0.08);
  border-color: rgba(0, 230, 118, 0.2);
}

.page-about__promise-icon {
  display: inline-block;
  font-size: 1.6rem;
  color: var(--page-gold);
  margin-bottom: 0.75rem;
  line-height: 1;
}

.page-about__promise-title {
  font-family: var(--font-headline, Montserrat, sans-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin: 0 0 0.6rem;
}

.page-about__promise-text {
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--page-on-surface);
  margin: 0;
}

/* ── 时间轴优化进程 ── */
.page-about__timeline-section {
  position: relative;
  z-index: 1;
  padding-top: var(--page-spacing-sm);
}

.page-about__timeline-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--page-spacing-md);
  margin-top: var(--page-spacing-sm);
  position: relative;
}

.page-about__timeline-visual {
  display: none;
  align-items: flex-start;
  justify-content: flex-start;
}

.page-about__timeline-deco {
  width: 100%;
  max-width: 200px;
  height: auto;
  object-fit: contain;
  opacity: 0.25;
}

.page-about__timeline-list {
  display: flex;
  flex-direction: column;
  gap: var(--page-spacing-md);
  position: relative;
}

.page-about__timeline-item {
  display: grid;
  grid-template-columns: var(--page-timeline-marker-size) 1fr;
  gap: 1rem;
  align-items: flex-start;
  cursor: pointer;
  transition: opacity 0.3s;
}

.page-about__timeline-item:hover {
  opacity: 0.9;
}

.page-about__timeline-marker {
  width: var(--page-timeline-marker-size);
  height: var(--page-timeline-marker-size);
  border-radius: 50%;
  background: var(--page-accent);
  margin-top: 6px;
  position: relative;
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.2);
  transition: box-shadow 0.3s, transform 0.3s;
}

.page-about__timeline-item:hover .page-about__timeline-marker {
  box-shadow: 0 0 0 5px rgba(0, 230, 118, 0.3);
  transform: scale(1.15);
}

.page-about__timeline-content {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-bottom: var(--page-spacing-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.page-about__timeline-label {
  font-family: var(--font-special, "Playfair Display", serif);
  font-size: 0.85rem;
  color: var(--page-gold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.page-about__timeline-headline {
  font-family: var(--font-headline, Montserrat, sans-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
}

.page-about__timeline-desc {
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--page-on-surface);
  margin: 0;
  max-width: 65ch;
}

/* ── CTA 区块 ── */
.page-about__cta {
  position: relative;
  z-index: 1;
}

.page-about__cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--page-spacing-sm);
  padding: var(--page-spacing-md);
  border-radius: var(--page-card-radius);
  background: var(--page-glass-bg);
  border: 1px solid var(--page-glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  text-align: center;
}

.page-about__cta-text {
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--page-on-surface);
  max-width: 60ch;
  margin: 0;
}

.page-about__cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--page-spacing-sm);
  justify-content: center;
}

.page-about__cta-links .btn {
  padding: 0.6rem 1.6rem;
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.3s, color 0.3s, box-shadow 0.3s;
  cursor: pointer;
  border: 1px solid transparent;
}

.page-about__cta-links .btn-primary {
  background: var(--page-accent);
  color: #000;
  border-color: var(--page-accent);
}
.page-about__cta-links .btn-primary:hover {
  background: #00c853;
  box-shadow: 0 4px 16px rgba(0, 230, 118, 0.3);
}

.page-about__cta-links .btn-ghost {
  background: transparent;
  color: var(--page-accent);
  border-color: rgba(0, 230, 118, 0.3);
}
.page-about__cta-links .btn-ghost:hover {
  background: rgba(0, 230, 118, 0.08);
  border-color: var(--page-accent);
}

/* ── 信任徽标 ── */
.page-about__trust {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}

.page-about__trust .trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1.2rem;
  background: rgba(0, 230, 118, 0.06);
  border: 1px solid rgba(0, 230, 118, 0.12);
  border-radius: 100px;
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 0.8rem;
  color: var(--page-accent);
}

.trust-badge__icon {
  font-size: 1rem;
  color: var(--page-gold);
}

/* ── 全局容器复用 ── */
.page-about .container {
  width: 100%;
  max-width: var(--container-max, 1280px);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--page-spacing-sm);
  padding-right: var(--page-spacing-sm);
  box-sizing: border-box;
}

/* ── 文字色彩辅助 ── */
.page-about .text-accent {
  color: var(--page-accent);
  font-weight: 600;
}

.page-about .text-gold {
  color: var(--page-gold);
  font-weight: 600;
}

/* ── 数据揭示动效 ── */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-about [data-reveal][data-revealed] {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about__promise-card:hover {
    transform: none;
  }
  .page-about__timeline-item:hover .page-about__timeline-marker {
    transform: none;
  }
}

/* ── 桌面端：≥768px ── */
@media (min-width: 768px) {
  .page-about {
    gap: var(--page-spacing-xl);
    padding: 0 0 var(--page-spacing-xl);
  }

  .page-about__hero {
    grid-template-columns: 1fr 1fr;
    gap: var(--page-spacing-lg);
    padding-top: var(--page-spacing-lg);
  }

  .page-about__hero-headline {
    font-size: 3.8rem;
  }

  .page-about__mission {
    grid-template-columns: 3fr 2fr;
    gap: var(--page-spacing-lg);
    padding-top: var(--page-spacing-md);
    align-items: center;
  }

  .page-about__promises-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__timeline-wrapper {
    grid-template-columns: auto 1fr;
    gap: var(--page-spacing-lg);
    align-items: flex-start;
  }

  .page-about__timeline-visual {
    display: flex;
    position: sticky;
    top: calc(var(--header-height, 56px) + 2rem);
  }

  .page-about__timeline-list {
    gap: var(--page-spacing-lg);
  }

  .page-about__cta-inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    padding: var(--page-spacing-md) var(--page-spacing-lg);
  }

  .page-about__cta-text {
    flex: 1;
  }

  .page-about .container {
    padding-left: var(--page-spacing-md);
    padding-right: var(--page-spacing-md);
  }
}

/* ── 大桌面端：≥1024px ── */
@media (min-width: 1024px) {
  .page-about__promises-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__hero {
    gap: var(--page-spacing-xl);
  }

  .page-about .container {
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }
}