/* ===== page-about 专属样式 ===== */
.page-about {
  --adelais-stripe: repeating-linear-gradient(
    90deg,
    #D43F36 0px, #D43F36 6px,
    #F2C94C 6px, #F2C94C 12px,
    #1E5B9E 12px, #1E5B9E 18px,
    #27AE60 18px, #27AE60 24px
  );
  --section-gap: var(--space-lg);
  --hero-min-h: 70vh;
  font-family: var(--font-body);
  color: var(--text-dark);
  background: var(--bg-light);
  overflow-x: hidden;
}

/* ---- 面包屑 ---- */
.page-about__breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.875rem;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.page-about__breadcrumb a {
  color: var(--primary-blue);
  text-decoration: none;
  font-weight: 700;
  transition: color 0.2s;
}
.page-about__breadcrumb a:hover,
.page-about__breadcrumb a:focus {
  color: var(--primary-red);
  text-decoration: underline;
}
.page-about__breadcrumb-sep {
  color: var(--accent-gold);
  font-size: 0.6rem;
  line-height: 1;
}
.page-about__breadcrumb [aria-current="page"] {
  font-weight: 600;
  color: var(--text-dark);
}

/* ---- 框景首屏 ---- */
.page-about__hero {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto var(--section-gap);
  min-height: var(--hero-min-h);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  border: 4px solid var(--primary-blue);
  outline: 2px solid var(--accent-gold);
  outline-offset: -8px;
  background: linear-gradient(145deg, var(--primary-blue) 0%, #0f3b6a 100%);
}
.page-about__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--adelais-stripe);
  opacity: 0.08;
  mix-blend-mode: overlay;
  pointer-events: none;
}
.page-about__hero::after {
  content: "";
  position: absolute;
  top: 10px; left: 10px; right: 10px; bottom: 10px;
  border: 1px dashed var(--accent-gold);
  opacity: 0.35;
  pointer-events: none;
}
.page-about__hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about__hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
  opacity: 0.45;
}
.page-about__hero-overlay {
  position: relative;
  z-index: 1;
  padding: var(--space-md) var(--space-sm);
  width: 100%;
  background: linear-gradient(transparent 0%, rgba(26,26,46,0.85) 100%);
}
.page-about__hero-title {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  letter-spacing: -0.02em;
  color: var(--text-light);
  margin: 0 0 var(--space-xs);
  text-shadow: 0 2px 12px rgba(0,0,0,0.5);
  line-height: 1.1;
}
.page-about__hero-sub {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin: 0 0 var(--space-xs);
  letter-spacing: 0.04em;
  text-shadow: 0 1px 6px rgba(0,0,0,0.4);
}
.page-about__hero-desc {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-light);
  max-width: 640px;
  margin: 0;
  text-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

/* ---- 纵向叙事章节通用 ---- */
.section-item {
  max-width: var(--max-width);
  margin: 0 auto var(--section-gap);
  padding: 0 var(--space-sm);
  position: relative;
  opacity: 0;
  animation: pageAboutFadeIn 1s ease-out forwards;
}
.page-about .section-item:nth-child(2) { animation-delay: 0.15s; }
.page-about .section-item:nth-child(4) { animation-delay: 0.35s; }
.page-about .section-item:nth-child(6) { animation-delay: 0.55s; }
.page-about .section-item:nth-child(8) { animation-delay: 0.75s; }

@keyframes pageAboutFadeIn {
  0%   { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

.page-about__section-title {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  letter-spacing: -0.02em;
  color: var(--primary-blue);
  margin: 0 0 var(--space-sm);
  line-height: 1.15;
}

/* ---- 01 我们的使命 ---- */
.page-about__mission {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-sm);
  border-left: 6px solid var(--primary-red);
  background: linear-gradient(135deg, #fff 0%, #f5f0eb 100%);
}
.page-about__mission-number {
  font-family: var(--font-heading);
  font-size: 3.6rem;
  line-height: 1;
  color: var(--primary-red);
  opacity: 0.2;
  letter-spacing: -0.04em;
  margin-bottom: -0.6em;
}
.page-about__mission-body {
  position: relative;
}
.page-about__mission-rule {
  width: 60px;
  height: 4px;
  background: var(--accent-gold);
  margin-bottom: var(--space-sm);
  border-radius: 2px;
}
.page-about__mission-text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
  margin: 0 0 var(--space-sm);
  max-width: 680px;
}
.page-about__mission-text:last-child {
  margin-bottom: 0;
}

/* ---- 艾德莱斯分隔线 ---- */
.page-about__divider {
  max-width: var(--max-width);
  margin: 0 auto var(--section-gap);
  height: 12px;
  background: var(--adelais-stripe);
  opacity: 0.6;
  border-radius: 6px;
  transform: scaleX(0.92);
}

/* ---- 02 服务特色 ---- */
.page-about__services {
  padding: var(--space-md) var(--space-sm);
  position: relative;
}
.page-about__services-number {
  font-family: var(--font-heading);
  font-size: 3.6rem;
  line-height: 1;
  color: var(--primary-blue);
  opacity: 0.12;
  letter-spacing: -0.04em;
  margin-bottom: -0.5em;
  pointer-events: none;
}
.page-about__services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}
.page-about__service-card {
  background: #fff;
  border-radius: 8px;
  padding: var(--space-sm);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: box-shadow 0.3s, transform 0.3s;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border: 1px solid var(--border-subtle);
}
.page-about__service-card:hover,
.page-about__service-card:focus-within {
  box-shadow: 0 6px 24px rgba(212,63,54,0.15);
  transform: translateY(-4px);
  border-color: var(--primary-red);
}
.page-about__service-icon {
  position: relative;
  width: 100%;
  max-width: 140px;
  aspect-ratio: 1/1;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: var(--space-xs);
  border: 3px solid var(--accent-gold);
  cursor: default;
}
.page-about__service-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s;
}
.page-about__service-card:hover .page-about__service-img {
  transform: scale(1.05);
}
.page-about__service-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(30,91,158,0.88);
  color: var(--text-light);
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  padding: 0.5rem;
  opacity: 0;
  transition: opacity 0.35s ease;
  backdrop-filter: blur(2px);
}
.page-about__service-card:hover .page-about__service-label,
.page-about__service-card:focus-within .page-about__service-label {
  opacity: 1;
}
.page-about__service-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--primary-blue);
  margin: 0;
  line-height: 1.3;
}

/* ---- 03 文化融合 ---- */
.page-about__culture {
  padding: var(--space-md) var(--space-sm);
}
.page-about__culture-number {
  font-family: var(--font-heading);
  font-size: 3.6rem;
  line-height: 1;
  color: var(--accent-green);
  opacity: 0.15;
  letter-spacing: -0.04em;
  margin-bottom: -0.5em;
  pointer-events: none;
}
.page-about__culture-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.page-about__culture-visual {
  flex: 1 1 45%;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  border: 2px solid var(--accent-gold);
}
.page-about__culture-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 2/1;
}
.page-about__culture-content {
  flex: 1 1 50%;
}
.page-about__culture-rule {
  width: 60px;
  height: 4px;
  background: var(--accent-green);
  margin-bottom: var(--space-sm);
  border-radius: 2px;
}
.page-about__culture-text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
  margin: 0 0 var(--space-sm);
  max-width: 640px;
}
.page-about__culture-text:last-child {
  margin-bottom: 0;
}

/* ---- 联系我们 ---- */
.page-about__connect {
  padding: var(--space-md) var(--space-sm);
  background: linear-gradient(135deg, var(--primary-blue) 0%, #0f3b6a 100%);
  border-radius: 12px;
  max-width: var(--max-width);
  margin: 0 auto var(--section-gap);
  color: var(--text-light);
  position: relative;
  overflow: hidden;
}
.page-about__connect::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--adelais-stripe);
  opacity: 0.06;
  mix-blend-mode: overlay;
  pointer-events: none;
}
.page-about__connect-body {
  position: relative;
  z-index: 1;
}
.page-about__connect-title {
  color: var(--accent-gold);
  margin-bottom: var(--space-xs);
}
.page-about__connect-desc {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: var(--space-sm);
  max-width: 600px;
}
.page-about__connect-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  font-style: normal;
  margin-bottom: var(--space-md);
}
.page-about__connect-item {
  font-size: 0.95rem;
  line-height: 1.5;
}
.page-about__link {
  color: var(--accent-gold);
  text-decoration: underline;
  font-weight: 600;
  transition: color 0.2s;
}
.page-about__link:hover,
.page-about__link:focus {
  color: var(--text-light);
}
.page-about__connect-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.page-about__cta {
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.7rem 1.6rem;
  border-radius: 6px;
  transition: background 0.25s, color 0.25s, transform 0.2s;
  display: inline-block;
}
.page-about__cta:hover,
.page-about__cta:focus {
  transform: translateY(-2px);
}

/* ---- 全局共享类的补充微调（限定在page-about内） ---- */
.page-about .frame-border {
  border-radius: 0;
}
.page-about .btn-primary {
  background: var(--primary-red);
  color: var(--text-light);
  border: 2px solid var(--primary-red);
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus {
  background: #b8322a;
  border-color: #b8322a;
}
.page-about .btn-outline {
  background: transparent;
  color: var(--accent-gold);
  border: 2px solid var(--accent-gold);
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus {
  background: var(--accent-gold);
  color: var(--primary-blue);
}
.page-about .back-to-top {
  position: fixed;
  bottom: var(--space-md);
  right: var(--space-sm);
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--accent-gold);
  background: var(--primary-blue);
  color: var(--text-light);
  font-size: 1.4rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.page-about .back-to-top.visible,
.page-about .back-to-top[data-back-to-top].visible {
  opacity: 1;
  visibility: visible;
}
.page-about .back-to-top:hover,
.page-about .back-to-top:focus {
  transform: scale(1.08);
  background: var(--primary-red);
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-about__hero-title {
    font-size: 3.6rem;
  }
  .page-about__hero-sub {
    font-size: 1.2rem;
  }
  .page-about__hero-desc {
    font-size: 1.1rem;
  }
  .page-about__hero-overlay {
    padding: var(--space-lg) var(--space-md);
  }

  .page-about__mission {
    flex-direction: row;
    align-items: flex-start;
    padding: var(--space-lg) var(--space-md);
    border-left-width: 8px;
  }
  .page-about__mission-number {
    font-size: 5rem;
    margin-bottom: 0;
    min-width: 100px;
    opacity: 0.15;
  }
  .page-about__section-title {
    font-size: 2.2rem;
  }

  .page-about__services {
    padding: var(--space-lg) var(--space-md);
  }
  .page-about__services-number {
    font-size: 5rem;
  }
  .page-about__services-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
  }
  .page-about__service-icon {
    max-width: 160px;
  }
  .page-about__service-label {
    font-size: 0.9rem;
  }
  .page-about__service-name {
    font-size: 1.15rem;
  }

  .page-about__culture {
    padding: var(--space-lg) var(--space-md);
  }
  .page-about__culture-number {
    font-size: 5rem;
  }
  .page-about__culture-wrap {
    flex-direction: row;
    align-items: center;
  }
  .page-about__culture-text {
    font-size: 1.05rem;
  }

  .page-about__connect {
    padding: var(--space-lg) var(--space-md);
    border-radius: 16px;
  }
  .page-about__connect-details {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-md);
  }
  .page-about__connect-item {
    font-size: 1rem;
  }
  .page-about .back-to-top {
    bottom: var(--space-lg);
    right: var(--space-md);
  }
}

@media (min-width: 1024px) {
  .page-about__hero {
    min-height: 75vh;
    border-width: 6px;
    outline-offset: -12px;
  }
  .page-about__hero::after {
    top: 14px; left: 14px; right: 14px; bottom: 14px;
  }
  .page-about__hero-title {
    font-size: 4.4rem;
  }
  .page-about__hero-sub {
    font-size: 1.35rem;
  }
  .page-about__hero-desc {
    font-size: 1.2rem;
    max-width: 720px;
  }
  .page-about__hero-overlay {
    padding: var(--space-lg) var(--space-xl, 3rem);
  }

  .page-about__mission-number {
    font-size: 6rem;
    min-width: 140px;
  }
  .page-about__mission-text {
    font-size: 1.1rem;
  }

  .page-about__services-grid {
    gap: var(--space-lg);
  }
  .page-about__service-card {
    padding: var(--space-md);
  }
  .page-about__service-icon {
    max-width: 180px;
  }

  .page-about__culture-number {
    font-size: 6rem;
    margin-bottom: -0.6em;
  }
  .page-about__culture-text {
    font-size: 1.1rem;
  }

  .page-about__connect {
    padding: var(--space-lg) var(--space-xl, 3rem);
  }
  .page-about__connect-desc {
    font-size: 1.1rem;
  }
}

.page-about {
  --space-xl: var(--space-xs);
}