/* ===== 页面专属样式：.page-about ===== */
.page-about {
  --hero-padding: var(--gap-xl) var(--gap-md);
  --grid-gap: var(--gap-lg);
  --card-min-width: 260px;
  --accent-font: 'Playfair Display', Georgia, 'Times New Roman', serif;
  display: flex;
  flex-direction: column;
  gap: var(--gap-xl);
  max-width: var(--max-w, 1200px);
  margin: 0 auto;
  padding-bottom: var(--gap-xl);
}

/* 第一部分：英雄区域（厚封面首屏） */
.about-hero {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
  padding: var(--hero-padding);
  background: linear-gradient(135deg, var(--color-bg-dark, #0B1026) 0%, var(--color-bg-medium, #151A3A) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
  margin-bottom: var(--gap-md);
}

.about-hero-text {
  flex: 1 1 60%;
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
}

.about-hero-visual {
  flex: 1 1 30%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 180px;
}

.hero-visual-bg {
  position: absolute;
  inset: 20%;
  background: var(--color-accent-gradient, linear-gradient(135deg, #8B5CF6, #FF6600));
  opacity: 0.15;
  filter: blur(40px);
  border-radius: 50%;
  z-index: 0;
}

.about-hero-visual .brand-icon-shape {
  position: relative;
  z-index: 1;
  object-fit: contain;
  border: 2px solid var(--color-primary, #FF6600);
  padding: var(--gap-sm);
  background: var(--color-bg-dark, #0B1026);
  box-shadow: 0 0 30px rgba(255, 102, 0, 0.3);
  aspect-ratio: 1/1;
}

.section-tag {
  align-self: flex-start;
  margin-bottom: var(--gap-sm);
}

.hero-heading {
  font-family: var(--accent-font, serif);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.1;
  color: var(--color-white, #FFFFFF);
  text-shadow: 2px 2px 0 var(--color-primary, #FF6600);
}

.hero-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-primary, #E5E7EB);
  max-width: 65ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-md);
  margin-top: var(--gap-sm);
}

/* 第二部分：服务内容（宽章节） */
.about-services {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
  padding: 0 var(--gap-md);
}

.services-header {
  text-align: center;
}

.section-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--color-white, #FFFFFF);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-accent-gradient, linear-gradient(135deg, #8B5CF6, #FF6600));
  margin-top: var(--gap-sm);
  transform: skewX(-15deg);
}

.section-subtitle {
  color: var(--color-text-secondary, #9CA3AF);
  margin-top: var(--gap-sm);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--card-min-width), 1fr));
  gap: var(--grid-gap);
}

.service-card {
  background: var(--color-bg-medium, #151A3A);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: var(--gap-lg);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  transition: all var(--transition-med, 0.35s ease);
  clip-path: polygon(calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px), 0 0);
  cursor: default;
}

.service-card:hover,
.service-card:focus-within {
  border-color: var(--color-primary, #FF6600);
  box-shadow: 0 8px 30px rgba(255, 102, 0, 0.3);
  transform: translateY(-4px);
}

.service-icon {
  font-size: 2.2rem;
  line-height: 1;
  margin-bottom: var(--gap-sm);
}

.service-heading {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-primary, #FF6600);
}

.service-summary {
  color: var(--color-text-secondary, #9CA3AF);
  font-size: 0.95rem;
  line-height: 1.6;
  flex: 1;
}

.service-detail {
  display: flex;
  align-items: center;
  gap: var(--gap-sm);
  padding-top: var(--gap-sm);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: auto;
  font-size: 0.85rem;
  color: var(--color-text-muted, #6B7280);
}

.services-visual {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-top: var(--gap-md);
}

.services-visual img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-md, 8px);
  border: 1px solid rgba(139, 92, 246, 0.3);
  background: var(--color-bg-light, #1E2450);
}

/* 第三部分：联系区域（窄章节） */
.about-contact {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg);
  padding: var(--gap-xl) var(--gap-md);
  background: linear-gradient(145deg, var(--color-bg-medium, #151A3A), var(--color-bg-dark, #0B1026));
  clip-path: polygon(0 0, 100% 40px, 100% 100%, 0 calc(100% - 40px));
  margin-top: var(--gap-lg);
}

.contact-content {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

.contact-desc {
  color: var(--color-text-primary, #E5E7EB);
  line-height: 1.7;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  padding: var(--gap-md) 0;
}

.contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap-sm) var(--gap-md);
  padding: var(--gap-md);
  background: rgba(255, 255, 255, 0.03);
  border-left: 4px solid var(--color-primary, #FF6600);
}

.contact-label {
  font-weight: 600;
  color: var(--color-white, #FFFFFF);
  min-width: 90px;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-value {
  color: var(--color-text-primary, #E5E7EB);
  word-break: break-all;
  flex: 1;
}

.email-value {
  font-family: monospace;
  font-size: 1.1rem;
  color: var(--color-primary, #FF6600);
}

.contact-item .btn {
  flex-shrink: 0;
}

.contact-address {
  margin-top: var(--gap-md);
  padding: var(--gap-md);
  background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.2);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap-sm);
}

.trust-statement {
  width: 100%;
  font-size: 0.85rem;
  color: var(--color-text-muted, #6B7280);
  font-style: italic;
  margin-top: var(--gap-sm);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: var(--gap-sm);
}

.contact-visual {
  width: 100%;
  margin-top: var(--gap-md);
}

.contact-visual img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md, 8px);
  opacity: 0.7;
}

/* 响应式：桌面端（窄屏优先，宽屏增强） */
@media (min-width: 768px) {
  .about-hero {
    flex-direction: row;
    align-items: center;
    padding: var(--gap-xl) var(--gap-lg);
  }

  .about-hero-visual {
    min-height: 240px;
    justify-content: flex-end;
  }

  .about-hero-visual .brand-icon-shape {
    width: 150px;
    height: 150px;
  }

  .hero-heading {
    font-size: 3rem;
  }

  .services-grid {
    --card-min-width: 280px;
  }

  .service-card {
    padding: var(--gap-lg) var(--gap-xl);
  }

  .about-contact {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--gap-xl) var(--gap-lg);
  }

  .contact-content {
    flex: 1 1 60%;
  }

  .contact-visual {
    flex: 1 1 35%;
  }

  .contact-visual img {
    height: 300px;
    object-fit: cover;
  }

  .section-title {
    font-size: 2.2rem;
  }
}

@media (min-width: 1024px) {
  .about-hero {
    padding: calc(var(--gap-xl) * 1.5) var(--gap-xl);
  }

  .hero-heading {
    font-size: 3.8rem;
  }

  .about-services {
    padding: 0 var(--gap-xl);
  }
}