.page-about {
  --about-hero-bg: #F8F8F8;
  --about-grid-color: rgba(30, 144, 255, 0.08);
  --about-card-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  --about-card-radius: 12px;
  display: block;
  width: 100%;
  min-height: 100vh;
  background: var(--about-hero-bg);
  font-family: var(--font-body, 'Google Sans', Arial, sans-serif);
  color: var(--color-text, #222);
  line-height: 1.6;
}

/* ── 面包屑 ── */
.page-about .breadcrumb {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
  font-size: 0.8rem;
  color: #666;
  letter-spacing: 0.02em;
}
.page-about .breadcrumb a {
  color: var(--color-secondary, #1E90FF);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .breadcrumb a:hover {
  color: var(--color-primary, #CC2936);
}
.page-about .breadcrumb span[aria-current="page"] {
  color: var(--color-text, #222);
  font-weight: 600;
}
.page-about .breadcrumb span[aria-hidden="true"] {
  margin: 0 0.4rem;
  color: #aaa;
}

/* ── Hero 首屏 ── */
.page-about__hero {
  position: relative;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 3rem 1.25rem 4rem;
  text-align: center;
  overflow: hidden;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.page-about__hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}
.page-about__hero-title {
  position: relative;
  z-index: 1;
  font-family: var(--font-heading, Impact, sans-serif);
  font-size: clamp(2.8rem, 10vw, 5.6rem);
  color: var(--color-primary, #CC2936);
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-transform: uppercase;
  margin: 0 0 0.6rem;
  text-shadow: 0 2px 8px rgba(204, 41, 54, 0.15);
}
.page-about__hero-subtitle {
  position: relative;
  z-index: 1;
  font-family: var(--font-body, 'Google Sans', Arial, sans-serif);
  font-size: clamp(1rem, 3vw, 1.6rem);
  color: var(--color-text, #222);
  font-weight: 400;
  letter-spacing: 0.04em;
  margin: 0;
  opacity: 0.85;
}
.page-about__hero-fish {
  position: relative;
  z-index: 1;
  margin-top: 1.8rem;
  opacity: 0.6;
}
.page-about__hero-fish-svg {
  width: 70px;
  height: 35px;
  display: block;
}

/* ── 品牌故事 ── */
.page-about__story {
  background: #fff;
  padding: 3rem 0;
}
.page-about__story-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}
.page-about__story-text {
  flex: 1 1 50%;
  max-width: 680px;
}
.page-about__section-title {
  font-family: var(--font-heading, Impact, sans-serif);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--color-primary, #CC2936);
  margin: 0 0 1.2rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.page-about__section-title--serif {
  font-family: Georgia, 'Times New Roman', serif;
  font-weight: 700;
  letter-spacing: 0.01em;
  font-style: italic;
}
.page-about__section-title--centered {
  text-align: center;
}
.page-about__section-title--light {
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}
.page-about__story-p {
  font-size: 1.05rem;
  line-height: 1.75;
  color: #333;
  margin: 0 0 1.4rem;
  max-width: 620px;
}
.page-about__story-p strong {
  font-family: var(--font-number, 'Courier New', monospace);
  color: var(--color-primary, #CC2936);
  font-size: 1.2em;
}
.page-about__story-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.2rem;
}
.page-about__story-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-secondary, #1E90FF);
  border: 1px solid var(--color-secondary, #1E90FF);
  border-radius: 20px;
  padding: 0.2rem 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.page-about__story-image {
  flex: 1 1 45%;
  min-width: 0;
  border-radius: var(--about-card-radius);
  overflow: hidden;
  box-shadow: var(--about-card-shadow);
}
.page-about__img-fluid {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ── 核心功能 ── */
.page-about__features {
  padding: 4rem 0 3rem;
  background: var(--about-hero-bg);
}
.page-about__features-lead {
  text-align: center;
  font-size: 1rem;
  color: #666;
  margin: -0.6rem 0 2.4rem;
  font-style: italic;
}
.page-about__features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 900px;
  margin: 0 auto;
}
.page-about__feature-card {
  background: #fff;
  border-radius: var(--about-card-radius);
  padding: 1.6rem 1.4rem 1.8rem;
  box-shadow: var(--about-card-shadow);
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.2, 0.9, 0.3, 1), box-shadow 0.35s ease;
  cursor: default;
}
.page-about__feature-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}
.page-about__feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid rgba(30, 144, 255, 0.2);
  transition: border-color 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-about__feature-card:hover .page-about__feature-icon {
  border-color: var(--color-accent, #FFD700);
}
.page-about__feature-icon img {
  display: block;
  width: 80px;
  height: 80px;
  object-fit: cover;
}
.page-about__feature-title {
  font-family: var(--font-heading, Impact, sans-serif);
  font-size: 1.2rem;
  color: var(--color-primary, #CC2936);
  margin: 0 0 0.4rem;
  letter-spacing: 0.02em;
}
.page-about__feature-desc {
  font-size: 0.92rem;
  color: #555;
  margin: 0;
  transition: opacity 0.3s;
}
.page-about__feature-hover {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, rgba(204, 41, 54, 0.95) 0%, #CC2936 100%);
  color: #fff;
  font-size: 0.85rem;
  padding: 1rem 1.2rem;
  border-radius: 0 0 var(--about-card-radius) var(--about-card-radius);
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.2, 0.9, 0.3, 1);
  line-height: 1.5;
  pointer-events: none;
}
.page-about__feature-card:hover .page-about__feature-hover {
  transform: translateY(0);
}
.page-about__feature-hover strong {
  font-family: var(--font-number, 'Courier New', monospace);
  color: var(--color-accent, #FFD700);
}

/* ── 服务范围 ── */
.page-about__scope {
  position: relative;
  padding: 4rem 0;
  overflow: hidden;
}
.page-about__scope-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about__scope-bg {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.page-about__scope-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26, 26, 46, 0.88) 0%, rgba(204, 41, 54, 0.72) 100%);
}
.page-about__scope-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 720px;
}
.page-about__scope-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.6rem;
}
.page-about__scope-item {
  font-size: 1.05rem;
  padding: 0.5rem 0;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}
.page-about__scope-item:last-child {
  border-bottom: none;
}
.page-about__scope-bullet {
  color: var(--color-accent, #FFD700);
  font-size: 0.7rem;
  flex-shrink: 0;
}
.page-about__scope-note {
  font-size: 0.95rem;
  opacity: 0.9;
  font-style: italic;
  margin: 0;
}

/* ── 底部内链 ── */
.page-about__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  padding: 3rem 1.25rem 4rem;
}

/* ── 全局容器 ── */
.container {
  width: 100%;
  max-width: var(--max-width, 1200px);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
  box-sizing: border-box;
}

/* ── 响应式 768px+ ── */
@media (min-width: 768px) {
  .page-about__hero {
    padding: 5rem 2rem 6rem;
    min-height: 380px;
  }
  .page-about__hero-grid {
    background-size: 56px 56px;
  }
  .page-about__story-inner {
    flex-direction: row;
    gap: 3rem;
  }
  .page-about__story-text {
    flex: 1 1 50%;
  }
  .page-about__story-image {
    flex: 1 1 45%;
  }
  .page-about__features-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.8rem;
  }
  .page-about__feature-card {
    padding: 2rem 1.6rem 2.2rem;
  }
  .page-about__scope {
    padding: 5rem 0;
  }
  .page-about__links {
    gap: 1.4rem;
    padding: 3.5rem 1.25rem 5rem;
  }
}

/* ── 响应式 1024px+ ── */
@media (min-width: 1024px) {
  .page-about__hero {
    padding: 6rem 2rem 7rem;
    min-height: 420px;
  }
  .page-about__features-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1100px;
  }
  .page-about__feature-card {
    padding: 2.2rem 1.4rem 2.4rem;
  }
  .page-about__scope {
    padding: 6rem 0;
  }
  .page-about__scope-content {
    max-width: 640px;
  }
}

/* ── 滚动渐入（data-scroll-fade 由全局 JS 控制，这里定义过渡） ── */
[data-scroll-fade] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.2, 0.9, 0.3, 1), transform 0.6s cubic-bezier(0.2, 0.9, 0.3, 1);
}
[data-scroll-fade].visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── 按钮风格（继承共享类） ── */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 2rem;
  font-family: var(--font-body, 'Google Sans', Arial, sans-serif);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 40px;
  text-decoration: none;
  transition: background 0.25s, color 0.25s, box-shadow 0.25s, transform 0.2s;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.page-about .btn--primary {
  background: var(--color-primary, #CC2936);
  color: #fff;
  box-shadow: 0 4px 14px rgba(204, 41, 54, 0.3);
}
.page-about .btn--primary:hover {
  background: #b82430;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(204, 41, 54, 0.35);
}
.page-about .btn--outline {
  background: transparent;
  color: var(--color-secondary, #1E90FF);
  border: 2px solid var(--color-secondary, #1E90FF);
}
.page-about .btn--outline:hover {
  background: var(--color-secondary, #1E90FF);
  color: #fff;
  transform: translateY(-2px);
}