/* =============================================
   page-about – 公司介绍页面专属样式
   作用域限定：.page-about
   移动端优先，含断点适配
   ============================================= */

.page-about {
  --about-gold-line: linear-gradient(90deg, var(--color-gold), var(--color-red));
  --about-card-hover-bg: rgba(242, 201, 76, 0.08);
  --about-brand-min-height: 360px;
  --about-content-gap: 2.5rem;
  --about-section-spacing: 3.5rem;
  --about-icon-size: 80px;
  --about-compliance-border: 1px solid rgba(242, 201, 76, 0.35);

  /* 继承全局设计令牌 */
  font-family: var(--font-body);
  color: var(--color-white);
  background-color: var(--color-deep-blue);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.6rem;
  padding: 0.75rem 1.25rem;
  font-size: 0.8rem;
  color: var(--color-gray-1);
  background: rgba(11, 26, 46, 0.85);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  max-width: var(--max-width);
  margin: 0 auto;
}
.page-about .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--color-white);
  outline: none;
  text-decoration: underline;
}
.page-about .breadcrumb-sep {
  color: var(--color-gray-1);
  font-weight: 300;
  opacity: 0.6;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-white);
  font-weight: 500;
}

/* ---------- 通用章节容器 ---------- */
.page-about .about-section {
  padding: var(--about-section-spacing) 1.25rem;
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}
.page-about .content-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0;
}
.page-about .section-number {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--color-gold);
  opacity: 0.7;
  line-height: 1;
  margin-bottom: 0.4rem;
}
.page-about .section-title {
  font-family: var(--font-heading);
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--color-white);
  margin: 0 0 0.6rem;
  font-size: 1.8rem;
  line-height: 1.25;
}
.page-about .section-desc {
  font-size: 1rem;
  color: var(--color-gray-1);
  margin: 0 0 1.8rem;
  line-height: 1.5;
}
.page-about .section-header {
  margin-bottom: 2.2rem;
}

/* ---------- 01 品牌宣言 ---------- */
.page-about .about-brand {
  position: relative;
  min-height: var(--about-brand-min-height);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1.25rem;
  overflow: hidden;
  margin-top: 0;
}
.page-about .about-brand-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .about-brand-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}
.page-about .about-brand-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(11, 26, 46, 0.88) 30%, rgba(11, 26, 46, 0.65) 70%, rgba(11, 26, 46, 0.4) 100%);
}
.page-about .about-brand-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  padding: 1.2rem 0;
}
.page-about .about-brand-title {
  font-size: 2.4rem;
  letter-spacing: 0.08em;
  margin-bottom: 1.2rem;
  background: var(--color-gold-red-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}
.page-about .about-brand-desc {
  font-size: 1.05rem;
  color: var(--color-white);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto 1.6rem;
  opacity: 0.92;
}
.page-about .about-brand-line {
  width: 100px;
  height: 4px;
  background: var(--about-gold-line);
  border-radius: 4px;
  margin: 0 auto;
}
.page-about .about-brand .section-number {
  position: static;
  display: block;
  margin-bottom: 0.6rem;
  font-size: 2.4rem;
}

/* ---------- 02 核心服务概览 ---------- */
.page-about .about-services {
  padding-top: var(--about-section-spacing);
  padding-bottom: var(--about-section-spacing);
}
.page-about .services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 2rem;
}
.page-about .service-card {
  position: relative;
  background: var(--color-gray-2);
  border-radius: var(--card-radius);
  padding: 1.75rem 1.5rem 1.5rem;
  transition: transform 0.25s ease, box-shadow 0.3s ease, background 0.3s ease;
  cursor: default;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.page-about .service-card:hover,
.page-about .service-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(242, 201, 76, 0.2);
  background: var(--about-card-hover-bg);
}
.page-about .service-card-icon {
  width: var(--about-icon-size);
  height: var(--about-icon-size);
  margin-bottom: 1rem;
  border-radius: 50%;
  background: rgba(242, 201, 76, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid rgba(242, 201, 76, 0.15);
  transition: border-color 0.3s, background 0.3s;
}
.page-about .service-card:hover .service-card-icon,
.page-about .service-card:focus-within .service-card-icon {
  border-color: var(--color-gold);
  background: rgba(242, 201, 76, 0.18);
}
.page-about .service-icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 50%;
}
.page-about .service-card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  color: var(--color-white);
  margin: 0 0 0.5rem;
}
.page-about .service-card-desc {
  font-size: 0.9rem;
  color: var(--color-gray-1);
  line-height: 1.55;
  margin: 0;
}
.page-about .service-card-hover {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(242, 201, 76, 0.15);
  transition: opacity 0.3s ease, transform 0.3s ease;
  opacity: 0;
  transform: translateY(6px);
}
.page-about .service-card:hover .service-card-hover,
.page-about .service-card:focus-within .service-card-hover {
  opacity: 1;
  transform: translateY(0);
}
.page-about .hover-hint {
  font-size: 0.85rem;
  color: var(--color-gold);
  font-style: italic;
}
.page-about .about-services-cta {
  text-align: center;
  margin-top: 2rem;
}
.page-about .about-services-cta .btn {
  display: inline-block;
  padding: 0.8rem 2.4rem;
  background: var(--color-gold);
  color: var(--color-deep-blue);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
  border-radius: 40px;
  text-decoration: none;
  transition: background 0.3s, transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 4px 16px rgba(242, 201, 76, 0.25);
}
.page-about .about-services-cta .btn:hover,
.page-about .about-services-cta .btn:focus-visible {
  background: var(--color-gold-red-gradient);
  transform: scale(1.03);
  box-shadow: 0 6px 24px rgba(230, 57, 70, 0.3);
  outline: none;
}

/* ---------- 03 合规与联系方式 ---------- */
.page-about .about-compliance {
  padding-top: var(--about-section-spacing);
  padding-bottom: 3rem;
}
.page-about .compliance-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.page-about .compliance-card {
  background: rgba(44, 62, 80, 0.55);
  border: var(--about-compliance-border);
  border-radius: var(--card-radius);
  padding: 1.75rem 1.5rem;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  transition: box-shadow 0.3s, border-color 0.3s;
}
.page-about .compliance-card:hover {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 2px rgba(242, 201, 76, 0.1);
}
.page-about .compliance-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.page-about .compliance-icon {
  font-size: 1.6rem;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(242, 201, 76, 0.1);
  border-radius: 50%;
  flex-shrink: 0;
}
.page-about .compliance-card-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  color: var(--color-white);
  margin: 0;
}
.page-about .compliance-card-desc {
  font-size: 0.9rem;
  color: var(--color-gray-1);
  line-height: 1.6;
  margin: 0 0 0.8rem;
}
.page-about .compliance-icp {
  font-family: var(--font-data);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-gold);
  letter-spacing: 0.06em;
  margin: 0.3rem 0 1rem;
  padding: 0.4rem 0.8rem;
  background: rgba(242, 201, 76, 0.06);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 4px 4px 0;
}
.page-about .compliance-card-footer {
  margin-top: 1.2rem;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}
.page-about .compliance-link {
  color: var(--color-gold);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s, text-decoration 0.2s;
}
.page-about .compliance-link:hover,
.page-about .compliance-link:focus-visible {
  color: var(--color-white);
  text-decoration: underline;
  outline: none;
}
.page-about .compliance-link-sep {
  color: var(--color-gray-1);
  opacity: 0.4;
  font-size: 0.85rem;
}
.page-about .compliance-contact-list {
  list-style: none;
  padding: 0;
  margin: 0.8rem 0 1rem;
}
.page-about .compliance-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  padding: 0.4rem 0;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--color-white);
  flex-wrap: wrap;
}
.page-about .contact-label {
  flex-shrink: 0;
  color: var(--color-gray-1);
  min-width: 3.2rem;
}
.page-about .contact-value {
  word-break: break-all;
  color: var(--color-white);
}
.page-about .contact-email {
  color: var(--color-gold);
  text-decoration: none;
  border-bottom: 1px dotted rgba(242, 201, 76, 0.3);
  transition: border-color 0.2s;
}
.page-about .contact-email:hover {
  border-bottom-color: var(--color-gold);
}
.page-about .contact-copy-btn {
  background: transparent;
  border: 1px solid rgba(242, 201, 76, 0.3);
  color: var(--color-gold);
  font-size: 0.75rem;
  padding: 0.1rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
  font-family: var(--font-body);
}
.page-about .contact-copy-btn:hover,
.page-about .contact-copy-btn:focus-visible {
  background: rgba(242, 201, 76, 0.12);
  border-color: var(--color-gold);
  outline: none;
}
.page-about .compliance-card-note {
  font-size: 0.82rem;
  color: var(--color-gray-1);
  font-style: italic;
  margin: 0.4rem 0 0;
}
.page-about .compliance-visual {
  text-align: center;
  margin-top: 1.8rem;
}
.page-about .compliance-visual-img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: var(--card-radius);
  border: 1px solid rgba(242, 201, 76, 0.15);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
  object-fit: cover;
  display: inline-block;
}

/* ---------- 返回顶部 ---------- */
.page-about .back-to-top {
  position: fixed;
  bottom: 1.2rem;
  right: 1.2rem;
  z-index: 999;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-gold);
  color: var(--color-deep-blue);
  font-size: 1.3rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(242, 201, 76, 0.3);
  transition: opacity 0.35s, transform 0.25s, visibility 0.35s;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.page-about .back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.page-about .back-to-top:hover,
.page-about .back-to-top:focus-visible {
  background: var(--color-gold-red-gradient);
  transform: scale(1.08) translateY(0);
  outline: none;
  box-shadow: 0 6px 24px rgba(230, 57, 70, 0.35);
}

/* ---------- fade-in-section 渐入 ---------- */
.page-about .fade-in-section {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.page-about .fade-in-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   响应式 – 平板 ≥ 600px
   ============================================= */
@media (min-width: 600px) {
  .page-about .about-section {
    padding-left: 2rem;
    padding-right: 2rem;
  }
  .page-about .brand-title {
    font-size: 2.8rem;
  }
  .page-about .services-grid {
    gap: 1.5rem;
  }
  .page-about .compliance-grid {
    gap: 2rem;
  }
  .page-about .about-brand-line {
    width: 140px;
  }
  .page-about .about-brand-content {
    padding: 2rem 0;
  }
}

/* =============================================
   响应式 – 桌面 ≥ 900px
   ============================================= */
@media (min-width: 900px) {
  .page-about .about-section {
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }
  .page-about .section-number {
    font-size: 3.2rem;
  }
  .page-about .section-title {
    font-size: 2.2rem;
  }
  .page-about .about-brand-title {
    font-size: 3.2rem;
  }
  .page-about .about-brand-desc {
    font-size: 1.1rem;
  }
  .page-about .about-brand .section-number {
    font-size: 2.8rem;
  }
  .page-about .services-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
  }
  .page-about .compliance-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .service-card {
    padding: 2rem 1.75rem 1.75rem;
  }
  .page-about .compliance-visual {
    text-align: right;
    margin-top: 0;
    position: relative;
    top: -2rem;
  }
  .page-about .compliance-visual-img {
    max-width: 280px;
  }
  .page-about .about-brand {
    min-height: 420px;
  }
}

/* =============================================
   响应式 – 宽屏 ≥ 1200px
   ============================================= */
@media (min-width: 1200px) {
  .page-about .services-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-section {
    padding-left: 0;
    padding-right: 0;
  }
  .page-about .about-brand {
    border-radius: 0 0 24px 24px;
  }
  .page-about .about-brand-title {
    font-size: 3.6rem;
  }
  .page-about .about-brand {
    min-height: 460px;
  }
  .page-about .compliance-visual-img {
    max-width: 300px;
  }
}

/* ---------- 打印与辅助 ---------- */
@media print {
  .page-about .back-to-top {
    display: none !important;
  }
  .page-about .about-brand-bg {
    display: none;
  }
  .page-about .about-brand-overlay {
    background: none;
  }
  .page-about .about-brand-title {
    -webkit-text-fill-color: var(--color-gold);
    color: var(--color-gold);
  }
  .page-about .service-card-hover {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- 偏好减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .page-about .fade-in-section {
    opacity: 1;
    transform: none;
  }
  .page-about .back-to-top {
    transition: none;
  }
}
</style>