/* ===== 品牌档案页专属样式 ===== */
.page-about {
  --about-hero-min-height: 480px;
  --about-card-radius: 20px;
  --about-timeline-gold: #D4A843;
  --about-timeline-line: #2A3F5F;
  --about-section-gap: 3rem;
  color: var(--color-text-primary, #111111);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  min-height: var(--about-hero-min-height);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(145deg, #0A2342 0%, #0f2f5a 60%, #1a3a5c 100%);
  padding: 2rem 1.5rem;
}

.page-about .about-hero__image-wrap {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.page-about .about-hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  opacity: 0.25;
}

.page-about .about-hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(to bottom, rgba(10,35,66,0.60) 0%, rgba(10,35,66,0.85) 100%);
}

.page-about .about-hero__content {
  position: relative;
  z-index: 3;
  max-width: 720px;
  text-align: center;
  padding: 1rem 0;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  color: rgba(255,255,255,0.7);
  margin-bottom: 1.5rem;
}

.page-about .about-breadcrumb__link {
  color: var(--about-timeline-gold);
  text-decoration: none;
  transition: opacity var(--transition-default, 0.3s);
}

.page-about .about-breadcrumb__link:hover,
.page-about .about-breadcrumb__link:focus-visible {
  opacity: 0.8;
  text-decoration: underline;
}

.page-about .about-breadcrumb__sep {
  color: rgba(255,255,255,0.35);
}

.page-about .about-breadcrumb__current {
  color: rgba(255,255,255,0.9);
}

.page-about .about-hero__title {
  font-family: var(--font-heading, "Arial Black", Impact, sans-serif);
  font-size: 2.8rem;
  line-height: 1.1;
  color: var(--color-text-on-dark, #FFFFFF);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.page-about .about-hero__title-accent {
  display: inline-block;
  background: linear-gradient(135deg, #D4A843 0%, #f0c860 60%, #D4A843 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-left: 0.2em;
}

.page-about .about-hero__desc {
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.88);
  max-width: 580px;
  margin: 0 auto 1.8rem;
}

.page-about .about-hero__cta {
  display: inline-block;
  padding: 0.75rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  color: #0A2342;
  background: linear-gradient(135deg, #D4A843 0%, #e8c060 100%);
  border-radius: var(--radius-capsule, 50px);
  transition: transform var(--transition-default, 0.3s), box-shadow var(--transition-default, 0.3s);
  box-shadow: 0 4px 16px rgba(212,168,67,0.3);
}

.page-about .about-hero__cta:hover,
.page-about .about-hero__cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(212,168,67,0.45);
}

/* ---------- 通用章节标题 ---------- */
.page-about .about-section__title {
  font-family: var(--font-heading, "Arial Black", Impact, sans-serif);
  font-size: 2rem;
  line-height: 1.2;
  color: var(--color-primary, #0A2342);
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}

.page-about .about-section__title--light {
  color: var(--color-text-on-dark, #FFFFFF);
}

.page-about .about-section__lead {
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 1rem;
  line-height: 1.7;
  color: #444;
  max-width: 640px;
  margin: 0 0 2rem;
}

.page-about .about-section__lead--light {
  color: rgba(255,255,255,0.85);
}

/* ---------- 我们的服务 ---------- */
.page-about .about-services {
  background: var(--color-background-light, #F5F3EE);
  padding: 3rem 1.5rem;
}

.page-about .about-services__inner {
  max-width: 1100px;
  margin: 0 auto;
}

.page-about .about-services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-about .about-service-card {
  background: #FFFFFF;
  border-radius: var(--about-card-radius);
  padding: 1.8rem 1.5rem;
  box-shadow: 0 2px 12px rgba(10,35,66,0.06);
  transition: transform var(--transition-default, 0.3s), box-shadow var(--transition-default, 0.3s);
  border: 1px solid rgba(212,168,67,0.08);
}

.page-about .about-service-card:hover,
.page-about .about-service-card:focus-within {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 8px 30px rgba(10,35,66,0.12);
  border-color: rgba(212,168,67,0.25);
}

.page-about .about-service-card__icon {
  color: var(--color-accent, #D4A843);
  margin-bottom: 1rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(212,168,67,0.08);
}

.page-about .about-service-card__title {
  font-family: var(--font-heading, "Arial Black", Impact, sans-serif);
  font-size: 1.2rem;
  color: var(--color-primary, #0A2342);
  margin: 0 0 0.5rem;
}

.page-about .about-service-card__desc {
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 0.92rem;
  line-height: 1.7;
  color: #444;
  margin: 0;
}

/* ---------- 数据保障 ---------- */
.page-about .about-guarantee {
  background: linear-gradient(145deg, #0A2342 0%, #123a5e 100%);
  padding: 3rem 1.5rem;
}

.page-about .about-guarantee__inner {
  max-width: 1100px;
  margin: 0 auto;
}

.page-about .about-guarantee__content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  margin-top: 1.5rem;
}

.page-about .about-guarantee__visual {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* SVG 时间线 */
.page-about .about-timeline-svg {
  margin: 0;
  text-align: center;
}

.page-about .about-timeline-svg__graph {
  width: 100%;
  max-width: 600px;
  height: auto;
  display: block;
  margin: 0 auto;
}

.page-about .about-timeline-svg__caption {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  margin-top: 0.5rem;
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
}

/* 交互式时间线详情 */
.page-about .about-timeline-details {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}

.page-about .about-timeline-details__item {
  border-radius: 12px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
  transition: background var(--transition-default, 0.3s);
}

.page-about .about-timeline-details__item:hover,
.page-about .about-timeline-details__item:focus-within {
  background: rgba(255,255,255,0.1);
}

.page-about .about-timeline-details__item--highlight {
  border-color: rgba(212,168,67,0.35);
  background: rgba(212,168,67,0.08);
}

.page-about .about-timeline-details__item--highlight:hover,
.page-about .about-timeline-details__item--highlight:focus-within {
  background: rgba(212,168,67,0.14);
}

.page-about .about-timeline-details__summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.2rem;
  cursor: pointer;
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-on-dark, #FFFFFF);
  list-style: none;
  user-select: none;
}

.page-about .about-timeline-details__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline-details__summary::marker {
  display: none;
}

.page-about .about-timeline-details__dot {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-timeline-line);
  border: 2px solid transparent;
}

.page-about .about-timeline-details__dot--gold {
  background: var(--about-timeline-gold);
  border-color: var(--about-timeline-gold);
  box-shadow: 0 0 8px rgba(212,168,67,0.5);
}

.page-about .about-timeline-details__label--gold {
  color: var(--about-timeline-gold);
}

.page-about .about-timeline-details__text {
  padding: 0 1.2rem 1rem;
  margin: 0;
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.78);
}

.page-about .about-guarantee__image-wrap {
  border-radius: var(--about-card-radius);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
  max-width: 600px;
  margin: 0 auto;
}

.page-about .about-guarantee__image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---------- 为什么选择我们 ---------- */
.page-about .about-why-us {
  background: var(--color-background-light, #F5F3EE);
  padding: 3rem 1.5rem;
}

.page-about .about-why-us__inner {
  max-width: 1100px;
  margin: 0 auto;
}

.page-about .about-why-us__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin: 1.5rem 0 2rem;
}

.page-about .about-why-card {
  background: #FFFFFF;
  border-radius: var(--about-card-radius);
  padding: 1.5rem 1.5rem 1.8rem;
  position: relative;
  border-left: 4px solid var(--color-accent, #D4A843);
  box-shadow: 0 2px 10px rgba(10,35,66,0.05);
  transition: transform var(--transition-default, 0.3s), box-shadow var(--transition-default, 0.3s);
}

.page-about .about-why-card:hover,
.page-about .about-why-card:focus-within {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(10,35,66,0.1);
}

.page-about .about-why-card__num {
  font-family: var(--font-heading, "Arial Black", Impact, sans-serif);
  font-size: 2rem;
  line-height: 1;
  color: rgba(212,168,67,0.2);
  position: absolute;
  top: 0.6rem;
  right: 1rem;
  pointer-events: none;
  user-select: none;
}

.page-about .about-why-card__title {
  font-family: var(--font-heading, "Arial Black", Impact, sans-serif);
  font-size: 1.1rem;
  color: var(--color-primary, #0A2342);
  margin: 0 0 0.4rem;
}

.page-about .about-why-card__desc {
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 0.9rem;
  line-height: 1.7;
  color: #555;
  margin: 0;
}

.page-about .about-why-us__bottom {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 1rem;
}

.page-about .about-why-us__image-wrap {
  border-radius: var(--about-card-radius);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(10,35,66,0.12);
  max-width: 600px;
  margin: 0 auto;
}

.page-about .about-why-us__image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .about-why-us__cta-wrap {
  text-align: center;
  padding: 0.5rem 0;
}

.page-about .about-why-us__cta-text {
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 0.95rem;
  line-height: 1.7;
  color: #444;
  margin: 0 0 1.2rem;
}

.page-about .about-why-us__cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.page-about .about-why-us__cta-btn {
  display: inline-block;
  padding: 0.65rem 1.8rem;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  color: #0A2342;
  background: linear-gradient(135deg, #D4A843 0%, #e8c060 100%);
  border-radius: var(--radius-capsule, 50px);
  transition: transform var(--transition-default, 0.3s), box-shadow var(--transition-default, 0.3s);
  box-shadow: 0 3px 12px rgba(212,168,67,0.25);
}

.page-about .about-why-us__cta-btn:hover,
.page-about .about-why-us__cta-btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(212,168,67,0.4);
}

.page-about .about-why-us__link {
  font-family: var(--font-body, "Source Sans Pro", Helvetica, sans-serif);
  font-size: 0.95rem;
  color: var(--color-link, #D4A843);
  text-decoration: underline;
  transition: opacity var(--transition-default, 0.3s);
}

.page-about .about-why-us__link:hover,
.page-about .about-why-us__link:focus-visible {
  opacity: 0.8;
}

/* ---------- 桌面端 (≥768px) ---------- */
@media (min-width: 768px) {
  .page-about {
    --about-hero-min-height: 560px;
  }

  .page-about .about-hero__title {
    font-size: 4.2rem;
  }

  .page-about .about-hero__desc {
    font-size: 1.1rem;
  }

  .page-about .about-section__title {
    font-size: 2.6rem;
  }

  .page-about .about-services {
    padding: 4rem 2.5rem;
  }

  .page-about .about-services__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.8rem;
  }

  .page-about .about-service-card {
    padding: 2rem 1.8rem;
  }

  .page-about .about-guarantee {
    padding: 4rem 2.5rem;
  }

  .page-about .about-guarantee__content {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }

  .page-about .about-guarantee__visual {
    flex: 1.3;
  }

  .page-about .about-guarantee__image-wrap {
    flex: 0.9;
    max-width: 400px;
    margin: 0;
  }

  .page-about .about-why-us {
    padding: 4rem 2.5rem;
  }

  .page-about .about-why-us__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-why-us__bottom {
    flex-direction: row;
    align-items: center;
    gap: 3rem;
    margin-top: 2rem;
  }

  .page-about .about-why-us__image-wrap {
    flex: 1;
    max-width: 480px;
    margin: 0;
  }

  .page-about .about-why-us__cta-wrap {
    flex: 1;
    text-align: left;
  }

  .page-about .about-why-us__cta-group {
    justify-content: flex-start;
  }
}

/* ---------- 大桌面端 (≥1024px) ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__title {
    font-size: 5.2rem;
  }

  .page-about .about-hero__content {
    max-width: 820px;
  }

  .page-about .about-section__title {
    font-size: 3rem;
  }

  .page-about .about-services {
    padding: 5rem 2.5rem;
  }

  .page-about .about-guarantee {
    padding: 5rem 2.5rem;
  }

  .page-about .about-why-us {
    padding: 5rem 2.5rem;
  }

  .page-about .about-why-us__grid {
    gap: 1.8rem;
  }
}

/* ---------- 超小屏安全 ---------- */
@media (max-width: 380px) {
  .page-about .about-hero__title {
    font-size: 2rem;
  }

  .page-about .about-hero {
    padding: 1.2rem 1rem;
  }

  .page-about .about-services,
  .page-about .about-guarantee,
  .page-about .about-why-us {
    padding: 2rem 1rem;
  }

  .page-about .about-section__title {
    font-size: 1.5rem;
  }

  .page-about .about-service-card {
    padding: 1.2rem 1rem;
  }

  .page-about .about-why-card {
    padding: 1.2rem 1rem 1.4rem;
  }
}