/* ===== 品牌概况页专属样式 ===== */
.page-about {
  --page-accent-gradient: linear-gradient(135deg, #7B2FF7, #39FF14);
  --page-card-bg: #102A4A;
  --page-border-color: #1E3A5F;
  --page-text-muted: #B0BEC5;
  --page-section-gap: 5rem;
  --page-number-size: 4rem;
  background: #0B1D3A;
  color: #FFFFFF;
  font-family: 'Segoe UI', 'Noto Sans SC', sans-serif;
  position: relative;
  z-index: 1;
}

/* 容器 */
.page-about-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

/* 面包屑 */
.page-about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: #B0BEC5;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #1E3A5F;
}
.page-about-breadcrumb-link {
  color: #7B2FF7;
  text-decoration: none;
  transition: color 0.2s;
}
.page-about-breadcrumb-link:hover {
  color: #39FF14;
}
.page-about-breadcrumb-sep {
  color: #1E3A5F;
  font-family: 'Courier New', monospace;
}
.page-about-breadcrumb-current {
  color: #FFFFFF;
  font-weight: 600;
}

/* 章节通用 */
.page-about-section {
  position: relative;
  padding: 2rem 0;
  margin-bottom: var(--page-section-gap);
}
.page-about-section:last-of-type {
  margin-bottom: 0;
}

/* 章节编号 */
.page-about-section-number {
  font-family: 'Courier New', 'Noto Sans Mono', monospace;
  font-size: var(--page-number-size);
  font-weight: 900;
  line-height: 1;
  color: #1E3A5F;
  opacity: 0.5;
  margin-bottom: 0.5rem;
  letter-spacing: -0.04em;
  user-select: none;
}

/* 标题体系 */
.page-about-heading {
  font-family: Arial, 'Noto Sans SC', sans-serif;
  font-weight: 900;
  font-size: 1.8rem;
  line-height: 1.15;
  margin: 0 0 0.75rem;
  color: #FFFFFF;
  letter-spacing: 0.01em;
}
.page-about-heading-primary {
  font-size: 2.2rem;
}
.page-about-heading-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #7B2FF7;
  margin-bottom: 0.4rem;
  font-weight: 400;
}

/* 品牌名超粗 + 电光紫渐变 + 光效 */
.page-about-brand-name {
  display: block;
  font-size: clamp(2.8rem, 12vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  background: linear-gradient(135deg, #7B2FF7, #39FF14);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  padding-bottom: 0.1em;
  position: relative;
  animation: page-about-glow-pulse 3s ease-in-out infinite alternate;
}
@keyframes page-about-glow-pulse {
  0% { filter: brightness(1) drop-shadow(0 0 6px rgba(123, 47, 247, 0.4)); }
  100% { filter: brightness(1.15) drop-shadow(0 0 18px rgba(57, 255, 20, 0.3)); }
}

/* 段落 */
.page-about-lead {
  font-size: 1.05rem;
  line-height: 1.6;
  color: #39FF14;
  font-weight: 400;
  margin: 0 0 1.25rem;
  max-width: 42em;
}
.page-about-text-block {
  max-width: 38em;
  margin-bottom: 1.5rem;
}
.page-about-text-block p {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #B0BEC5;
  margin: 0 0 0.85rem;
}

/* 视觉图片块 */
.page-about-visual-block {
  margin-top: 1.5rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid #1E3A5F;
  background: #102A4A;
  position: relative;
}
.page-about-visual-block::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(123, 47, 247, 0.08), rgba(57, 255, 20, 0.04));
  border-radius: 8px;
}
.page-about-visual-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center;
  border-radius: 8px;
}

/* ----- 服务范围网格 ----- */
.page-about-service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.75rem 0 1.25rem;
}
.page-about-service-item {
  background: #102A4A;
  border: 1px solid #1E3A5F;
  border-radius: 10px;
  padding: 1.5rem 1.25rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}
.page-about-service-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(123, 47, 247, 0.18);
  border-color: #7B2FF7;
}
.page-about-service-icon {
  width: 2.8rem;
  height: 2.8rem;
  margin-bottom: 0.75rem;
  color: #7B2FF7;
}
.page-about-service-svg {
  width: 100%;
  height: 100%;
}
.page-about-service-title {
  font-family: Arial, 'Noto Sans SC', sans-serif;
  font-weight: 900;
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
  color: #FFFFFF;
}
.page-about-service-desc {
  font-size: 0.85rem;
  line-height: 1.55;
  color: #B0BEC5;
  margin: 0;
}
.page-about-service-note {
  margin-top: 1rem;
  padding: 1rem 0 0;
  border-top: 1px solid #1E3A5F;
}
.page-about-service-note p {
  font-size: 0.85rem;
  color: #B0BEC5;
  margin: 0;
  max-width: 36em;
}

/* 图标集视觉块 */
.page-about-visual-block-icons {
  margin-top: 1.75rem;
}

/* ----- 承诺卡片网格 ----- */
.page-about-commitment-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin: 1.75rem 0 1.5rem;
}
.page-about-commitment-card {
  background: #102A4A;
  border: 1px solid #1E3A5F;
  border-radius: 10px;
  padding: 1.5rem 1.25rem;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.page-about-commitment-card:hover {
  border-color: #39FF14;
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.12);
}
.page-about-commitment-card-icon {
  display: inline-block;
  font-size: 1.8rem;
  line-height: 1;
  color: #39FF14;
  margin-bottom: 0.5rem;
  font-family: 'Courier New', monospace;
}
.page-about-commitment-card-title {
  font-family: Arial, 'Noto Sans SC', sans-serif;
  font-weight: 900;
  font-size: 1.05rem;
  margin: 0 0 0.35rem;
  color: #FFFFFF;
}
.page-about-commitment-card-text {
  font-size: 0.85rem;
  line-height: 1.55;
  color: #B0BEC5;
  margin: 0;
}
.page-about-visual-block-commitment {
  margin-top: 1.75rem;
}

/* CTA */
.page-about-commitment-cta {
  margin-top: 2rem;
  padding: 1.25rem 0 0;
  border-top: 1px solid #1E3A5F;
}
.page-about-commitment-cta p {
  font-size: 0.9rem;
  color: #B0BEC5;
  margin: 0;
}
.page-about-link {
  color: #7B2FF7;
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 47, 247, 0.3);
  transition: color 0.2s, border-color 0.2s;
}
.page-about-link:hover {
  color: #39FF14;
  border-bottom-color: #39FF14;
}

/* ----- 信任区 ----- */
.page-about-trust-full {
  padding: 0;
}
.page-about-trust-box {
  background: #102A4A;
  border: 1px solid #1E3A5F;
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-about-trust-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #7B2FF7, #39FF14);
}
.page-about-trust-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #B0BEC5;
  max-width: 32em;
  margin: 0 auto 1.5rem;
}
.page-about-trust-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* 按钮 - 覆盖共享基础 */
.page-about .nuoya-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.25s, border-color 0.25s, color 0.25s, box-shadow 0.25s;
  font-family: 'Segoe UI', 'Noto Sans SC', sans-serif;
  letter-spacing: 0.02em;
  border: 1.5px solid transparent;
}
.page-about .nuoya-btn-primary {
  background: linear-gradient(135deg, #7B2FF7, #39FF14);
  color: #0B1D3A;
  border-color: transparent;
}
.page-about .nuoya-btn-primary:hover {
  box-shadow: 0 4px 20px rgba(123, 47, 247, 0.35);
  transform: translateY(-1px);
}
.page-about .nuoya-btn-outline {
  background: transparent;
  color: #7B2FF7;
  border-color: #7B2FF7;
}
.page-about .nuoya-btn-outline:hover {
  background: rgba(123, 47, 247, 0.1);
  color: #39FF14;
  border-color: #39FF14;
}

/* 页面内章节导航浮层 */
.page-about-section-nav {
  position: fixed;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  display: none;
}
.page-about-section-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.page-about-section-nav-link {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #1E3A5F;
  text-indent: -9999px;
  overflow: hidden;
  white-space: nowrap;
  transition: background 0.25s, transform 0.25s;
  position: relative;
}
.page-about-section-nav-link:hover,
.page-about-section-nav-link:focus {
  background: #7B2FF7;
  transform: scale(1.35);
  outline: none;
}

/* 滚动渐入 - 交互增强（渐进增强） */
[data-scroll-fade] {
  opacity: 1;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

/* ===== 响应式 ===== */

/* 平板 ≥600px */
@media (min-width: 600px) {
  .page-about-inner {
    padding: 2.5rem 2rem 5rem;
  }
  .page-about-section {
    padding: 2.5rem 0;
  }
  .page-about-section-number {
    font-size: 5rem;
  }
  .page-about-heading {
    font-size: 2.2rem;
  }
  .page-about-heading-primary {
    font-size: 2.8rem;
  }
  .page-about-service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about-commitment-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about-trust-box {
    padding: 2.5rem 2rem;
  }
}

/* 桌面 ≥960px */
@media (min-width: 960px) {
  .page-about-inner {
    padding: 3rem 2.5rem 6rem;
  }
  .page-about-section {
    display: grid;
    grid-template-columns: var(--page-number-size) 1fr;
    gap: 2rem;
    padding: 3rem 0;
  }
  .page-about-section-number {
    font-size: 6rem;
    margin-bottom: 0;
    text-align: right;
    line-height: 1;
    padding-top: 0.2em;
  }
  .page-about-heading {
    font-size: 2.6rem;
  }
  .page-about-heading-primary {
    font-size: 3.2rem;
  }
  .page-about-brand-name {
    font-size: clamp(3.2rem, 8vw, 6rem);
  }
  .page-about-service-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about-commitment-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .page-about-section-nav {
    display: block;
  }
  .page-about-trust-box {
    padding: 3rem 2.5rem;
  }
  .page-about-trust-links {
    gap: 1rem;
  }
  .page-about-visual-block {
    max-width: 85%;
  }
  .page-about-visual-block-icons {
    max-width: 50%;
  }
  .page-about-visual-block-commitment {
    max-width: 70%;
  }
}

/* 大桌面 ≥1200px */
@media (min-width: 1200px) {
  .page-about-section {
    gap: 3rem;
  }
  .page-about-section-number {
    font-size: 7rem;
  }
  .page-about-heading {
    font-size: 3rem;
  }
  .page-about-heading-primary {
    font-size: 3.6rem;
  }
}