/* ======= page-about 专属样式 ======= */
.page-about {
  --section-number-size: clamp(4rem, 8vw, 7rem);
  --hero-min-height: 60vh;
  font-family: var(--font-display, Impact, 'Arial Black', sans-serif);
}

/* 面包屑 */
.page-about .breadcrumb {
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-family: var(--font-body, Inter, sans-serif);
  color: var(--color-text-secondary, #8899AA);
}
.page-about .breadcrumb a {
  color: var(--color-primary, #00FF88);
  text-decoration: underline;
  transition: opacity 0.25s;
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  opacity: 0.8;
}
.page-about .breadcrumb-sep {
  margin: 0 0.2rem;
  font-size: 1.2rem;
  color: var(--color-text-secondary, #8899AA);
}

/* ===== 首屏分屏 ===== */
.page-about .hero-split {
  display: flex;
  flex-direction: column;
  min-height: var(--hero-min-height);
  background: var(--color-bg, #0B1A2E);
  position: relative;
  overflow: hidden;
}
/* 斜线切割装饰（伪元素） */
.page-about .hero-split::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, transparent 45%, var(--color-card, #1A2D44) 45%);
  opacity: 0.3;
  pointer-events: none;
}
.page-about .hero-text {
  position: relative;
  z-index: 1;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.page-about .hero-text h1 {
  font-family: var(--font-display, Impact, 'Arial Black', sans-serif);
  font-size: 2.8rem;
  line-height: 1.1;
  color: var(--color-text, #E0E6ED);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin: 0 0 0.5rem;
}
.page-about .hero-text .hero-sub {
  font-size: 1.4rem;
  color: var(--color-primary, #00FF88);
  margin: 0 0 1rem;
  font-weight: 700;
}
.page-about .hero-text p {
  font-family: var(--font-body, Inter, sans-serif);
  font-weight: 400;
  color: var(--color-text, #E0E6ED);
  max-width: 600px;
}
.page-about .hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}
.page-about .hero-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 0 30px rgba(0,255,136,0.15);
}

/* ===== 章节区块 ===== */
.page-about .section-block {
  display: flex;
  flex-direction: column;
  padding: 2rem 1.5rem;
  border-bottom: 1px solid var(--color-border, rgba(255,255,255,0.1));
  gap: 1rem;
}
.page-about .section-number {
  font-family: var(--font-display, Impact, 'Arial Black', sans-serif);
  font-size: var(--section-number-size);
  line-height: 1;
  color: var(--color-accent, #FF6B35);
  opacity: 0.6;
  user-select: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.page-about .section-block:hover .section-number {
  transform: scale(1.05);
  opacity: 0.9;
}
.page-about .section-body {
  flex: 1;
  font-family: var(--font-body, Inter, sans-serif);
}
.page-about .section-body h2 {
  font-family: var(--font-display, Impact, 'Arial Black', sans-serif);
  font-size: 1.8rem;
  margin: 0 0 0.8rem;
  color: var(--color-text, #E0E6ED);
  letter-spacing: 1px;
}
.page-about .section-body p {
  line-height: 1.7;
  margin-bottom: 1rem;
  color: var(--color-text, #E0E6ED);
}
.page-about .section-body .img-inline {
  margin-top: 1.5rem;
}
.page-about .section-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

/* ===== 可折叠细节 ===== */
.page-about .service-details {
  background: var(--color-card, #1A2D44);
  border: 1px solid var(--color-border, rgba(255,255,255,0.1));
  border-radius: 10px;
  margin-bottom: 0.8rem;
  transition: border-color 0.3s;
}
.page-about .service-details[open] {
  border-color: var(--color-primary, #00FF88);
}
.page-about .service-details summary {
  padding: 1rem 1.2rem;
  font-weight: 700;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--color-text, #E0E6ED);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s;
}
.page-about .service-details summary::-webkit-details-marker {
  display: none;
}
.page-about .service-details summary::before {
  content: '▶';
  font-size: 0.9rem;
  color: var(--color-primary, #00FF88);
  transition: transform 0.25s;
}
.page-about .service-details[open] summary::before {
  transform: rotate(90deg);
}
.page-about .service-details summary:hover {
  color: var(--color-primary, #00FF88);
}
.page-about .service-details > *:not(summary) {
  padding: 0 1.2rem 1rem;
  color: var(--color-text-secondary, #8899AA);
  line-height: 1.6;
}
.page-about .service-details .btn {
  margin-top: 0.5rem;
  display: inline-block;
}

/* ===== 按钮 ===== */
.page-about .btn {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  border-radius: 30px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.3s, transform 0.2s;
  font-family: var(--font-body, Inter, sans-serif);
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
}
.page-about .btn-primary {
  background: var(--color-primary, #00FF88);
  color: #0B1A2E;
}
.page-about .btn-primary:hover,
.page-about .btn-primary:focus-visible {
  background: #00cc6a;
  transform: scale(1.02);
}
.page-about .btn-accent {
  background: var(--color-accent, #FF6B35);
  color: #fff;
}
.page-about .btn-accent:hover,
.page-about .btn-accent:focus-visible {
  background: #e85a2a;
  transform: scale(1.02);
}

/* ===== 联系方式列表 ===== */
.page-about .contact-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0.5rem;
}
.page-about .contact-list li {
  padding: 0.3rem 0;
  color: var(--color-text, #E0E6ED);
  font-size: 1rem;
}
.page-about .contact-list strong {
  color: var(--color-primary, #00FF88);
}
.page-about .contact-list a {
  color: var(--color-accent, #FF6B35);
  text-decoration: underline;
}
.page-about .contact-note {
  font-size: 0.9rem;
  color: var(--color-text-secondary, #8899AA);
  margin-top: 0.6rem;
}

/* ===== 信任声明 ===== */
.page-about .trust-statement {
  margin: 1.5rem;
  padding: 1rem;
  background: var(--color-glass, rgba(255,255,255,0.08));
  border-radius: 12px;
  backdrop-filter: blur(6px);
  border: 1px solid var(--color-border, rgba(255,255,255,0.15));
}
.page-about .trust-statement p {
  font-size: 0.9rem;
  color: var(--color-text-secondary, #8899AA);
  text-align: center;
  margin: 0;
}

/* ===== 响应式桌面 ===== */
@media (min-width: 768px) {
  .page-about {
    max-width: 1200px;
    margin: 0 auto;
  }
  .page-about .hero-split {
    flex-direction: row;
    align-items: stretch;
  }
  .page-about .hero-text {
    flex: 1;
    padding: 3rem 2.5rem;
  }
  .page-about .hero-visual {
    flex: 1;
    padding: 2rem;
  }
  .page-about .hero-text h1 {
    font-size: 3.6rem;
  }
  .page-about .section-block {
    flex-direction: row;
    align-items: flex-start;
    padding: 3rem 2.5rem;
    gap: 2rem;
  }
  .page-about .section-number {
    flex-shrink: 0;
    width: 100px;
    text-align: right;
    font-size: clamp(5rem, 10vw, 8rem);
    margin-top: -0.2rem;
  }
  .page-about .section-body {
    max-width: 700px;
  }
  .page-about .contact-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
  }
  .page-about .contact-list li {
    min-width: 200px;
  }
  .page-about .img-inline {
    display: inline-block;
    margin-right: 1rem;
  }
  .page-about .service-details {
    max-width: 600px;
  }
  .page-about .trust-statement {
    margin: 2rem auto;
    max-width: 800px;
  }
}

.page-about {
  --font-body: inherit;
}