/* ============================================================
   page-about 品牌故事 — 页面专属样式
   作用域限定：.page-about
   刊物气质 · 衬线标题 · 大留白 · 非对称构图
   ============================================================ */
.page-about {
  --about-accent: var(--color-primary, #FF4500);
  --about-heading-font: Georgia, 'Times New Roman', serif;
  --about-body-font: var(--font-body, -apple-system, 'Inter', 'Segoe UI', Arial, sans-serif);
  --about-number-font: var(--font-data, 'JetBrains Mono', 'Consolas', monospace);
  --about-radius-card: var(--radius-xl, 24px);
  --about-radius-pill: var(--radius-pill, 9999px);
  --about-space-section: var(--space-4xl, 96px);
  --about-space-block: var(--space-3xl, 64px);
}

/* ----- 面包屑 ----- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm, 8px);
  padding-top: var(--space-lg, 24px);
  padding-bottom: var(--space-md, 16px);
  font-size: 14px;
  color: var(--color-text-secondary, #B0B0B0);
  font-family: var(--about-body-font);
  letter-spacing: 0.02em;
}
.page-about .breadcrumb a {
  color: var(--color-text-secondary, #B0B0B0);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}
.page-about .breadcrumb a:hover {
  color: var(--about-accent);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-text, #FFFFFF);
  font-weight: 600;
}

/* ----- 首屏 Hero ----- */
.page-about .about-hero {
  padding: var(--about-space-block) 0;
  position: relative;
}
.page-about .about-hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl, 48px);
  align-items: center;
}
@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-3xl, 64px);
  }
}
.page-about .about-hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg, 24px);
}
.page-about .about-hero-title {
  font-family: var(--about-heading-font);
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-text, #FFFFFF);
  letter-spacing: -0.02em;
  margin: 0;
}
.page-about .about-hero-subtitle {
  font-family: var(--about-heading-font);
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 700;
  color: var(--about-accent);
  margin: 0;
  line-height: 1.3;
}
.page-about .about-mission {
  border-left: 4px solid var(--about-accent);
  padding-left: var(--space-lg, 24px);
  margin-top: var(--space-md, 16px);
}
.page-about .about-mission-heading {
  font-family: var(--about-heading-font);
  font-weight: 700;
  color: var(--color-text, #FFFFFF);
  margin: 0 0 var(--space-sm, 8px) 0;
}
.page-about .about-mission-body {
  font-family: var(--about-body-font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
  max-width: 520px;
}
.page-about .about-mission-quote {
  color: var(--color-text, #FFFFFF);
  font-weight: 600;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md, 16px);
  margin-top: var(--space-sm, 8px);
}
.page-about .about-hero-image {
  position: relative;
}
.page-about .about-hero-img-wrapper {
  border-radius: var(--about-radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.4));
  background: var(--color-surface, #161B22);
}
.page-about .about-hero-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 1200 / 800;
}

/* ----- 特色区 ----- */
.page-about .about-features {
  padding: var(--about-space-section) 0;
  position: relative;
}
.page-about .about-section-label {
  font-family: var(--about-heading-font);
  font-weight: 700;
  color: var(--color-text, #FFFFFF);
  margin: 0 0 var(--space-md, 16px) 0;
  position: relative;
  display: inline-block;
}
.page-about .about-section-label::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--about-accent);
  margin-top: var(--space-sm, 8px);
  border-radius: var(--about-radius-pill);
}
.page-about .about-features-intro {
  font-family: var(--about-body-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text-secondary, #B0B0B0);
  max-width: 640px;
  margin: 0 0 var(--space-2xl, 48px) 0;
}
.page-about .features-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl, 32px);
}
@media (min-width: 768px) {
  .page-about .features-grid {
    gap: var(--space-2xl, 48px);
  }
}
.page-about .feature-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg, 24px);
  padding: var(--space-lg, 24px);
  background: var(--color-surface, #161B22);
  border-radius: var(--about-radius-card);
  transition: background var(--transition-base, 0.3s ease), box-shadow var(--transition-base, 0.3s ease);
  position: relative;
}
@media (min-width: 700px) {
  .page-about .feature-card {
    grid-template-columns: 80px 1fr 240px;
    align-items: center;
    padding: var(--space-xl, 32px);
  }
}
@media (min-width: 1000px) {
  .page-about .feature-card {
    grid-template-columns: 100px 1fr 280px;
    padding: var(--space-2xl, 48px);
  }
}
.page-about .feature-card:hover {
  background: rgba(255, 69, 0, 0.06);
  box-shadow: 0 8px 32px rgba(255, 69, 0, 0.10);
}
.page-about .feature-number {
  font-family: var(--about-number-font);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  color: var(--about-accent);
  line-height: 1;
  opacity: 0.5;
  align-self: start;
  margin-top: -4px;
}
@media (min-width: 700px) {
  .page-about .feature-number {
    opacity: 0.35;
    text-align: center;
  }
}
.page-about .feature-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 8px);
}
.page-about .feature-title {
  font-family: var(--about-heading-font);
  font-weight: 700;
  color: var(--color-text, #FFFFFF);
  margin: 0;
}
.page-about .feature-desc {
  font-family: var(--about-body-font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
  max-width: 480px;
}
.page-about .feature-note {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs, 4px);
  font-family: var(--about-body-font);
  font-size: 13px;
  color: var(--about-accent);
  cursor: default;
  position: relative;
  width: fit-content;
  margin-top: var(--space-xs, 4px);
  border-bottom: 1px dashed var(--about-accent);
  padding-bottom: 2px;
  transition: color var(--transition-fast, 0.2s ease);
}
.page-about .feature-note:hover {
  color: var(--color-primary, #FF4500);
}
/* 悬浮提示 — 纯CSS实现 */
.page-about .feature-note[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: var(--color-bg, #0D1117);
  color: var(--color-text, #FFFFFF);
  font-family: var(--about-body-font);
  font-size: 13px;
  padding: var(--space-sm, 8px) var(--space-md, 16px);
  border-radius: var(--radius-md, 12px);
  white-space: nowrap;
  max-width: 280px;
  white-space: normal;
  box-shadow: 0 4px 16px rgba(0,0,0,0.6);
  border: 1px solid var(--color-border, #30363D);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition-fast, 0.2s ease), transform var(--transition-fast, 0.2s ease);
  z-index: 10;
  line-height: 1.4;
  text-align: center;
}
.page-about .feature-note[data-tip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}
.page-about .feature-img-wrap {
  border-radius: var(--radius-md, 12px);
  overflow: hidden;
  background: var(--color-bg, #0D1117);
  aspect-ratio: 800 / 600;
  width: 100%;
}
.page-about .feature-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-slow, 0.5s ease);
}
.page-about .feature-card:hover .feature-img {
  transform: scale(1.04);
}

/* ----- 服务承诺 ----- */
.page-about .about-commitment {
  padding: var(--about-space-section) 0;
}
.page-about .commitment-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl, 48px);
  align-items: center;
}
@media (min-width: 768px) {
  .page-about .commitment-inner {
    grid-template-columns: 1.3fr 0.7fr;
    gap: var(--space-3xl, 64px);
  }
}
.page-about .commitment-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg, 24px);
}
.page-about .commitment-body {
  font-family: var(--about-body-font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
  max-width: 560px;
}
.page-about .commitment-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 16px);
}
.page-about .commitment-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md, 16px);
  font-family: var(--about-body-font);
  font-size: 15px;
  color: var(--color-text, #FFFFFF);
  line-height: 1.5;
}
.page-about .commitment-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-success, #00FF7F);
  color: var(--color-bg, #0D1117);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  margin-top: 2px;
}
.page-about .commitment-contact {
  margin-top: var(--space-md, 16px);
  padding: var(--space-lg, 24px);
  background: var(--color-surface, #161B22);
  border-radius: var(--radius-md, 12px);
  border-left: 4px solid var(--about-accent);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm, 8px);
}
.page-about .commitment-contact-text {
  font-family: var(--about-body-font);
  font-size: 14px;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
}
.page-about .commitment-email {
  font-family: var(--about-body-font);
  font-size: 18px;
  font-weight: 600;
  color: var(--about-accent);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}
.page-about .commitment-email:hover {
  color: var(--color-primary, #FF4500);
}
.page-about .commitment-phone {
  font-family: var(--about-body-font);
  font-size: 15px;
  color: var(--color-text-secondary, #B0B0B0);
}
.page-about .commitment-image {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md, 16px);
}
.page-about .commitment-img-wrapper {
  border-radius: var(--about-radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.4));
  background: var(--color-surface, #161B22);
  width: 100%;
  max-width: 400px;
}
.page-about .commitment-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 400 / 300;
}
.page-about .commitment-icp {
  font-family: var(--about-number-font);
  font-size: 13px;
  color: var(--color-text-secondary, #B0B0B0);
  letter-spacing: 0.04em;
  opacity: 0.7;
}

/* ----- 信任内链区 ----- */
.page-about .about-trust {
  padding: var(--about-space-section) 0;
}
.page-about .trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg, 24px);
}
@media (min-width: 600px) {
  .page-about .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 900px) {
  .page-about .trust-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.page-about .trust-item {
  padding: var(--space-xl, 32px);
  background: var(--color-surface, #161B22);
  border-radius: var(--about-radius-card);
  display: flex;
  flex-direction: column;
  gap: var(--space-md, 16px);
  transition: background var(--transition-base, 0.3s ease);
}
.page-about .trust-item:hover {
  background: rgba(255, 69, 0, 0.06);
}
.page-about .trust-heading {
  font-family: var(--about-heading-font);
  font-weight: 700;
  color: var(--color-text, #FFFFFF);
  margin: 0;
}
.page-about .trust-text {
  font-family: var(--about-body-font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text-secondary, #B0B0B0);
  margin: 0;
}

/* ----- 滚动显现动画 ----- */
.page-about [data-reveal] {
  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 [data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}
.page-about [data-reveal="fade"] {
  transform: none;
}
.page-about [data-reveal="fade"].revealed {
  opacity: 1;
}
/* 错峰延迟支持 */
.page-about [data-delay="100"] { transition-delay: 0.1s; }
.page-about [data-delay="200"] { transition-delay: 0.2s; }
.page-about [data-delay="300"] { transition-delay: 0.3s; }

/* ----- 响应式微调 ----- */
@media (max-width: 599px) {
  .page-about .about-hero {
    padding: var(--space-xl, 32px) 0;
  }
  .page-about .about-hero-title {
    font-size: 32px;
  }
  .page-about .about-hero-subtitle {
    font-size: 18px;
  }
  .page-about .about-mission {
    padding-left: var(--space-md, 16px);
  }
  .page-about .feature-card {
    padding: var(--space-md, 16px);
  }
  .page-about .feature-number {
    font-size: 36px;
  }
  .page-about .feature-img-wrap {
    aspect-ratio: 16 / 9;
  }
  .page-about .commitment-inner {
    gap: var(--space-xl, 32px);
  }
  .page-about .commitment-contact {
    padding: var(--space-md, 16px);
  }
  .page-about .trust-item {
    padding: var(--space-lg, 24px);
  }
  .page-about .about-section-label::after {
    width: 40px;
  }
}

/* ----- 减少动效偏好 ----- */
@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .feature-note[data-tip]::after {
    transition: none;
  }
  .page-about .feature-card:hover .feature-img {
    transform: none;
  }
}