.page-about {
  --about-note-width: 280px;
  --about-gap: 40px;
  --about-num-size: 3.2rem;
  --about-deco-color: rgba(0, 212, 255, 0.15);
  display: block;
  max-width: var(--content-max-width, 1200px);
  margin: 0 auto;
  padding: 24px 20px 60px;
  color: var(--color-text-primary, #FFFFFF);
  font-family: Inter, sans-serif;
  line-height: 1.6;
}

/* ----- 面包屑 ----- */
.about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-secondary, #B0B0B0);
  margin-bottom: 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-divider, #00D4FF33);
}
.about-breadcrumb__link {
  color: var(--color-accent-blue, #00D4FF);
  text-decoration: none;
  transition: color 0.2s;
}
.about-breadcrumb__link:hover,
.about-breadcrumb__link:focus-visible {
  color: var(--color-accent-green, #39FF14);
  outline: var(--focus-outline, 2px solid #39FF14);
  outline-offset: 2px;
}
.about-breadcrumb__sep {
  user-select: none;
  opacity: 0.5;
}
.about-breadcrumb__current {
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* ----- 标题区 ----- */
.about-intro {
  position: relative;
  margin-bottom: 48px;
  padding-bottom: 32px;
}
.about-intro__title {
  font-family: Playfair Display, serif;
  font-weight: 900;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.15;
  margin: 0 0 8px;
  color: var(--color-text-primary, #FFFFFF);
  letter-spacing: -0.01em;
}
.about-intro__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary, #B0B0B0);
  max-width: 600px;
  margin: 0 0 20px;
  line-height: 1.5;
}
.about-intro__deco {
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent-blue, #00D4FF), var(--color-accent-green, #39FF14));
  border-radius: 2px;
}

/* ----- 通用分割 ----- */
.about-divider {
  height: 1px;
  margin: 48px 0;
  background: var(--color-divider, #00D4FF33);
  position: relative;
}
.about-divider::after {
  content: "";
  position: absolute;
  left: 0;
  top: -3px;
  width: 40px;
  height: 6px;
  background: var(--color-accent-blue, #00D4FF);
  border-radius: 3px;
  opacity: 0.6;
}

/* ----- 图片块 ----- */
.about-image-block {
  margin: 24px 0 0;
  border-radius: 8px;
  overflow: hidden;
  background: var(--color-chart-bg, #1A1A2E);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.about-image-block__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.about-image-block__cap {
  padding: 8px 14px;
  font-size: 0.8rem;
  color: var(--color-text-secondary, #B0B0B0);
  background: rgba(0,0,0,0.3);
  letter-spacing: 0.03em;
}
.about-image-block--mid {
  max-width: 520px;
}
.about-image-block--small {
  max-width: 360px;
  margin-top: 20px;
}

/* ----- 我们的使命 ----- */
.about-mission {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap, 40px);
}
.about-mission__note {
  padding: 16px 0 0;
  border-top: 3px solid var(--color-accent-blue, #00D4FF);
  flex-shrink: 0;
}
.about-mission__quote {
  font-family: Playfair Display, serif;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-accent-blue, #00D4FF);
  margin: 0 0 8px;
  line-height: 1.3;
}
.about-mission__ref {
  font-size: 0.9rem;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
  line-height: 1.5;
}
.about-mission__content {
  flex: 1;
  min-width: 0;
}
.about-mission__heading {
  font-family: Playfair Display, serif;
  font-weight: 900;
  font-size: 1.7rem;
  margin: 0 0 16px;
  color: var(--color-text-primary, #FFFFFF);
}
.about-mission__text {
  margin: 0 0 14px;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #B0B0B0);
}
.about-mission__text:last-of-type {
  margin-bottom: 0;
}

/* ----- 数据优势 ----- */
.about-data {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap, 40px);
}
.about-data__note {
  padding: 16px 0 0;
  border-top: 3px solid var(--color-accent-green, #39FF14);
  flex-shrink: 0;
}
.about-data__num {
  font-family: JetBrains Mono, monospace;
  font-size: var(--about-num-size, 3.2rem);
  font-weight: 700;
  color: var(--color-accent-green, #39FF14);
  margin: 0 0 4px;
  line-height: 1;
}
.about-data__num-label {
  font-weight: 600;
  font-size: 0.95rem;
  margin: 0 0 6px;
  color: var(--color-text-primary, #FFFFFF);
}
.about-data__ref {
  font-size: 0.85rem;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
  line-height: 1.5;
}
.about-data__content {
  flex: 1;
  min-width: 0;
}
.about-data__heading {
  font-family: Playfair Display, serif;
  font-weight: 900;
  font-size: 1.7rem;
  margin: 0 0 8px;
  color: var(--color-text-primary, #FFFFFF);
}
.about-data__lead {
  font-size: 1.05rem;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0 0 20px;
  line-height: 1.5;
}
.about-data__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.about-data__item {
  background: var(--color-card-bg, #2E0A4E);
  padding: 16px 18px;
  border-radius: 6px;
  border-left: 3px solid var(--color-accent-blue, #00D4FF);
  transition: box-shadow 0.25s, border-color 0.25s;
}
.about-data__item:hover {
  box-shadow: 0 0 0 1px var(--color-accent-blue, #00D4FF), 0 8px 24px rgba(0,212,255,0.12);
  border-left-color: var(--color-accent-green, #39FF14);
}
.about-data__item-title {
  display: block;
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-accent-blue, #00D4FF);
  margin-bottom: 4px;
}
.about-data__item-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary, #B0B0B0);
  line-height: 1.5;
}

/* 精度交互 */
.about-data__extra {
  margin: 12px 0 20px;
}
.about-data__detail-btn {
  background: transparent;
  border: 1px solid var(--color-accent-blue, #00D4FF);
  color: var(--color-accent-blue, #00D4FF);
  font-family: Inter, sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.about-data__detail-btn:hover,
.about-data__detail-btn:focus-visible {
  background: var(--color-accent-blue, #00D4FF);
  color: #1A0A2E;
  outline: var(--focus-outline, 2px solid #39FF14);
  outline-offset: 2px;
}
.about-data__detail-panel {
  margin-top: 12px;
  padding: 16px 18px;
  background: var(--color-card-bg, #2E0A4E);
  border-radius: 6px;
  border: 1px solid var(--color-divider, #00D4FF33);
  font-size: 0.9rem;
  color: var(--color-text-secondary, #B0B0B0);
  line-height: 1.6;
}
.about-data__detail-panel[hidden] {
  display: none;
}

/* ----- 团队承诺 ----- */
.about-commitment {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap, 40px);
}
.about-commitment__note {
  padding: 16px 0 0;
  border-top: 3px solid var(--color-accent-blue, #00D4FF);
  flex-shrink: 0;
}
.about-commitment__tag {
  font-family: Playfair Display, serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-accent-blue, #00D4FF);
  margin: 0 0 6px;
}
.about-commitment__ref {
  font-size: 0.85rem;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
  line-height: 1.5;
}
.about-commitment__content {
  flex: 1;
  min-width: 0;
}
.about-commitment__heading {
  font-family: Playfair Display, serif;
  font-weight: 900;
  font-size: 1.7rem;
  margin: 0 0 16px;
  color: var(--color-text-primary, #FFFFFF);
}
.about-commitment__text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0 0 14px;
}
.about-commitment__link {
  color: var(--color-accent-blue, #00D4FF);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.about-commitment__link:hover,
.about-commitment__link:focus-visible {
  color: var(--color-accent-green, #39FF14);
  outline: var(--focus-outline, 2px solid #39FF14);
  outline-offset: 2px;
}
.about-commitment__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-divider, #00D4FF33);
}
.about-commitment__meta-item {
  font-size: 0.8rem;
  color: var(--color-text-secondary, #B0B0B0);
  font-family: JetBrains Mono, monospace;
  letter-spacing: 0.02em;
}

/* ----- 底部CTA ----- */
.about-cta {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 2px solid var(--color-divider, #00D4FF33);
  text-align: center;
}
.about-cta__heading {
  font-family: Playfair Display, serif;
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0 0 20px;
  color: var(--color-text-primary, #FFFFFF);
}
.about-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ----- 桌面端媒体查询 ----- */
@media (min-width: 768px) {
  .page-about {
    padding: 32px 40px 80px;
  }
  .about-mission,
  .about-data,
  .about-commitment {
    flex-direction: row;
    align-items: flex-start;
  }
  .about-mission__note,
  .about-data__note,
  .about-commitment__note {
    width: var(--about-note-width, 280px);
    flex-shrink: 0;
    padding-right: 24px;
    border-top: none;
    border-left: 3px solid var(--color-accent-blue, #00D4FF);
    padding-left: 20px;
    margin-top: 6px;
  }
  .about-data__note {
    border-left-color: var(--color-accent-green, #39FF14);
  }
  .about-commitment__note {
    border-left-color: var(--color-accent-blue, #00D4FF);
  }
  .about-intro {
    padding-left: calc(var(--about-note-width, 280px) + var(--about-gap, 40px));
  }
  .about-intro__title {
    font-size: 3.4rem;
  }
  .about-mission__content,
  .about-data__content,
  .about-commitment__content {
    flex: 1;
    min-width: 0;
  }
  .about-data__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .about-data__item:last-child {
    grid-column: 1 / -1;
  }
  .about-image-block--mid {
    max-width: 480px;
  }
  .about-image-block--small {
    max-width: 280px;
  }
  .about-commitment__meta {
    flex-direction: row;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding: 40px 60px 100px;
  }
  .about-data__list {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .about-data__item:last-child {
    grid-column: auto;
  }
  .about-image-block--mid {
    max-width: 560px;
  }
  .about-image-block--small {
    max-width: 320px;
  }
}