/* 页面专属 CSS — 限定在 .page-about 作用域内 */
.page-about {
  --about-splash-bg: linear-gradient(135deg, #F0F8F0 0%, #D4EDDA 100%);
  --about-index-width: 100px;
  --about-block-gap: 56px;
  --about-card-shadow: 0 4px 16px rgba(46, 139, 87, 0.10);
  --about-transition: 0.25s ease;
  --about-skew-amount: -2deg;
  display: block;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--max-width-content, 1200px);
  margin: 0 auto;
  padding: var(--spacing-md, 16px) var(--spacing-lg, 24px) 0;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-small, 14px);
  color: var(--color-text-secondary, #555);
}

.page-about .breadcrumb a {
  color: var(--color-primary, #2E8B57);
  text-decoration: none;
  transition: color var(--transition-fast, 0.15s);
}

.page-about .breadcrumb a:hover {
  color: var(--color-accent, #DC143C);
}

.page-about .breadcrumb-sep {
  margin: 0 var(--spacing-xs, 4px);
  color: var(--color-border, #CCC);
}

.page-about .breadcrumb-current {
  color: var(--color-text, #222);
  font-weight: 600;
}

/* 首屏 — 对角错位色块 */
.page-about-splash {
  position: relative;
  max-width: var(--max-width-content, 1200px);
  margin: 0 auto;
  padding: var(--spacing-2xl, 48px) var(--spacing-lg, 24px) var(--spacing-3xl, 64px);
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.page-about-splash .splash-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl, 32px);
  width: 100%;
  position: relative;
  z-index: 1;
}

.page-about-splash .splash-text {
  flex: 1 1 50%;
}

.page-about-splash h1 {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: clamp(36px, 8vw, var(--font-scale-h1, 48px));
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-primary, #2E8B57);
  margin: 0 0 var(--spacing-sm, 8px);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
  display: inline-block;
}

.page-about-splash h1::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 60%;
  height: 4px;
  background: var(--color-highlight, #FFD700);
  border-radius: 2px;
  opacity: 0.5;
}

.page-about-splash .splash-claim {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: clamp(20px, 4vw, 28px);
  font-weight: 400;
  color: var(--color-accent, #DC143C);
  margin: 0 0 var(--spacing-md, 16px);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about-splash .splash-desc {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-body, 16px);
  line-height: 1.7;
  color: var(--color-text, #222);
  max-width: 540px;
  margin: 0 0 var(--spacing-lg, 24px);
}

.page-about-splash .btn-accent {
  display: inline-block;
  padding: 12px 32px;
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: 16px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fff;
  background: var(--color-accent, #DC143C);
  border-radius: var(--radius-md, 8px);
  text-decoration: none;
  transition: background var(--transition-base, 0.25s), transform var(--transition-base, 0.25s);
  border: none;
  cursor: pointer;
}

.page-about-splash .btn-accent:hover {
  background: var(--color-accent-dark, #B01030);
  transform: translateY(-2px);
}

.page-about-splash .splash-visual {
  flex: 1 1 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.page-about-splash .splash-visual::before {
  content: '';
  position: absolute;
  width: 80%;
  height: 80%;
  background: var(--color-primary, #2E8B57);
  opacity: 0.06;
  border-radius: 50%;
  transform: skew(var(--about-skew-amount, -2deg)) translate(10%, 10%);
  z-index: 0;
}

.page-about-splash .splash-visual img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  max-width: 600px;
  border-radius: var(--radius-lg, 12px);
  object-fit: cover;
  box-shadow: var(--shadow-lg, 0 8px 24px rgba(0,0,0,0.12));
  transform: rotate(var(--about-skew-amount, -2deg));
  transition: transform var(--about-transition);
}

.page-about-splash .splash-visual img:hover {
  transform: rotate(0deg) scale(1.01);
}

/* 故事内容布局：索引 + 内容 */
.story-layout {
  max-width: var(--max-width-content, 1200px);
  margin: 0 auto;
  padding: 0 var(--spacing-lg, 24px) var(--spacing-3xl, 64px);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl, 32px);
  position: relative;
}

/* 内容区 — 在移动端索引下方 */
.story-content {
  flex: 1 1 auto;
  order: 1;
}

/* 索引 — 移动端水平排列在上方 */
.story-index {
  order: 0;
  display: flex;
  flex-direction: row;
  gap: var(--spacing-sm, 8px);
  flex-wrap: wrap;
  padding: var(--spacing-md, 16px) 0;
  border-bottom: 2px solid var(--color-border-light, #E0E0E0);
  position: sticky;
  top: calc(var(--header-height, 56px) + 4px);
  z-index: 10;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.page-about .story-index .index-link {
  display: inline-block;
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary, #2E8B57);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-md, 8px);
  border: 2px solid transparent;
  transition: color var(--transition-fast, 0.15s), background var(--transition-fast, 0.15s), border-color var(--transition-fast, 0.15s);
  background: var(--color-bg-light, #F0F8F0);
}

.page-about .story-index .index-link:hover {
  color: var(--color-accent, #DC143C);
  background: #fff;
  border-color: var(--color-accent, #DC143C);
}

.page-about .story-index .index-link:focus-visible {
  outline: 2px solid var(--color-highlight, #FFD700);
  outline-offset: 2px;
}

/* 默认高亮第一个索引（无 :target 时） */
.page-about .story-content:not(:has(:target)) ~ .story-index .index-link:first-child {
  color: #fff;
  background: var(--color-primary, #2E8B57);
  border-color: var(--color-primary, #2E8B57);
}

/* :target 高亮对应索引 */
.page-about .story-content:has(#mission:target) ~ .story-index a[href="#mission"],
.page-about .story-content:has(#service:target) ~ .story-index a[href="#service"],
.page-about .story-content:has(#promise:target) ~ .story-index a[href="#promise"] {
  color: #fff;
  background: var(--color-accent, #DC143C);
  border-color: var(--color-accent, #DC143C);
}

/* 内容区块通用样式 */
.page-about .story-block {
  padding: var(--spacing-2xl, 48px) 0;
  position: relative;
  scroll-margin-top: calc(var(--header-height, 56px) + 60px);
}

.page-about .story-block + .story-block {
  border-top: 1px solid var(--color-border-light, #E0E0E0);
}

.page-about .block-label {
  font-family: var(--font-number, 'Fira Code', monospace);
  font-size: var(--font-scale-small, 14px);
  font-weight: 500;
  color: var(--color-accent, #DC143C);
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm, 8px);
  opacity: 0.7;
}

.page-about .story-block h2 {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: clamp(28px, 6vw, var(--font-scale-h2, 32px));
  font-weight: 700;
  color: var(--color-primary-dark, #1E6B3A);
  margin: 0 0 var(--spacing-md, 16px);
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  position: relative;
  display: inline-block;
}

.page-about .story-block h2::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-highlight, #FFD700);
  border-radius: 2px;
  opacity: 0.3;
}

.page-about .block-lead {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 18px;
  line-height: 1.6;
  color: var(--color-text, #222);
  font-weight: 500;
  margin: 0 0 var(--spacing-lg, 24px);
  max-width: 660px;
}

.page-about .story-block p {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-body, 16px);
  line-height: 1.7;
  color: var(--color-text-secondary, #555);
  margin: 0 0 var(--spacing-md, 16px);
  max-width: 680px;
}

/* 使命区块 */
.page-about .story-mission .mission-fact {
  display: flex;
  align-items: center;
  gap: var(--spacing-md, 16px);
  padding: var(--spacing-md, 16px) var(--spacing-lg, 24px);
  background: var(--color-bg-light, #F0F8F0);
  border-left: 4px solid var(--color-primary, #2E8B57);
  border-radius: 0 var(--radius-md, 8px) var(--radius-md, 8px) 0;
  margin: var(--spacing-lg, 24px) 0;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-body, 16px);
  color: var(--color-text, #222);
}

.page-about .story-mission .fact-icon {
  font-size: 28px;
  flex-shrink: 0;
}

.page-about .story-mission .mission-fact strong {
  color: var(--color-accent, #DC143C);
  font-family: var(--font-number, 'Fira Code', monospace);
  font-size: 20px;
}

.page-about .block-img {
  width: 100%;
  height: auto;
  max-width: 400px;
  border-radius: var(--radius-lg, 12px);
  object-fit: cover;
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.1));
  margin: var(--spacing-lg, 24px) 0 0;
  display: block;
  transform: skew(var(--about-skew-amount, -2deg));
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}

.page-about .block-img:hover {
  transform: skew(0deg) scale(1.01);
  box-shadow: var(--shadow-lg, 0 8px 24px rgba(0,0,0,0.12));
}

/* 核心服务网格 */
.page-about .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg, 24px);
  margin: var(--spacing-xl, 32px) 0;
}

.page-about .service-card {
  background: var(--color-bg-light, #F0F8F0);
  border-radius: var(--radius-lg, 12px);
  padding: var(--spacing-lg, 24px);
  box-shadow: var(--about-card-shadow);
  border: 1px solid transparent;
  transition: transform var(--about-transition), box-shadow var(--about-transition), border-color var(--about-transition);
  position: relative;
  overflow: hidden;
}

.page-about .service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-primary, #2E8B57);
  border-radius: 0 2px 2px 0;
}

.page-about .service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg, 0 8px 24px rgba(0,0,0,0.12));
  border-color: var(--color-primary-light, #4CAF6E);
  background: #fff;
}

.page-about .service-card:nth-child(2)::before {
  background: var(--color-accent, #DC143C);
}

.page-about .service-card:nth-child(3)::before {
  background: var(--color-highlight, #FFD700);
}

.page-about .service-card .card-icon {
  margin-bottom: var(--spacing-md, 16px);
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.page-about .service-card .card-title {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary-dark, #1E6B3A);
  margin: 0 0 var(--spacing-sm, 8px);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.page-about .service-card .card-text {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-small, 14px);
  line-height: 1.6;
  color: var(--color-text-secondary, #555);
  margin: 0 0 var(--spacing-md, 16px);
  max-width: 100%;
}

.page-about .service-card .tag {
  display: inline-block;
  font-family: var(--font-number, 'Fira Code', monospace);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-xl, 20px);
  background: var(--color-highlight, #FFD700);
  color: var(--color-text, #222);
  margin-right: var(--spacing-xs, 4px);
  margin-bottom: var(--spacing-xs, 4px);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.page-about .service-card .tag-accent {
  background: var(--color-accent, #DC143C);
  color: #fff;
}

.page-about .service-cta {
  margin-top: var(--spacing-lg, 24px);
  padding-top: var(--spacing-md, 16px);
  border-top: 1px dashed var(--color-border, #CCC);
}

.page-about .service-cta p {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-body, 16px);
  color: var(--color-text, #222);
  margin: 0;
  max-width: 100%;
}

.page-about .link-arrow {
  color: var(--color-accent, #DC143C);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast, 0.15s);
}

.page-about .link-arrow::after {
  content: ' →';
  display: inline;
  transition: transform var(--transition-fast, 0.15s);
}

.page-about .link-arrow:hover {
  color: var(--color-accent-dark, #B01030);
}

.page-about .link-arrow:hover::after {
  transform: translateX(4px);
}

/* 数据承诺区块 */
.page-about .promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg, 24px);
  margin: var(--spacing-xl, 32px) 0;
}

.page-about .promise-card {
  background: #fff;
  border-radius: var(--radius-lg, 12px);
  padding: var(--spacing-lg, 24px);
  border: 1px solid var(--color-border-light, #E0E0E0);
  box-shadow: var(--about-card-shadow);
  transition: transform var(--about-transition), box-shadow var(--about-transition), border-color var(--about-transition);
  text-align: center;
}

.page-about .promise-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg, 0 8px 24px rgba(0,0,0,0.12));
  border-color: var(--color-primary, #2E8B57);
}

.page-about .promise-number {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
  margin-bottom: var(--spacing-sm, 8px);
}

.page-about .stat-number-lg {
  font-family: var(--font-number, 'Fira Code', monospace);
  font-size: clamp(40px, 10vw, 56px);
  font-weight: 700;
  color: var(--color-accent, #DC143C);
  line-height: 1;
  letter-spacing: -0.03em;
}

.page-about .percent-sign {
  font-family: var(--font-number, 'Fira Code', monospace);
  font-size: 28px;
  font-weight: 500;
  color: var(--color-accent, #DC143C);
  opacity: 0.7;
}

.page-about .promise-label {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary, #2E8B57);
  margin: 0 0 var(--spacing-sm, 8px);
}

.page-about .promise-desc {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-small, 14px);
  line-height: 1.6;
  color: var(--color-text-secondary, #555);
  margin: 0;
  max-width: 100%;
}

.page-about .promise-visual {
  display: flex;
  justify-content: center;
  margin: var(--spacing-xl, 32px) 0;
}

.page-about .promise-img {
  width: 100%;
  height: auto;
  max-width: 400px;
  border-radius: var(--radius-lg, 12px);
  object-fit: cover;
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.1));
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}

.page-about .promise-img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-lg, 0 8px 24px rgba(0,0,0,0.12));
}

.page-about .promise-footer {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: var(--font-scale-body, 16px);
  color: var(--color-text, #222);
  margin-top: var(--spacing-lg, 24px);
  padding-top: var(--spacing-md, 16px);
  border-top: 1px solid var(--color-border-light, #E0E0E0);
  max-width: 100%;
}

.page-about .promise-footer a {
  color: var(--color-accent, #DC143C);
  text-decoration: none;
  font-weight: 600;
  transition: color var(--transition-fast, 0.15s);
}

.page-about .promise-footer a:hover {
  color: var(--color-accent-dark, #B01030);
  text-decoration: underline;
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-about-splash .splash-inner {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-2xl, 48px);
  }

  .page-about-splash .splash-text {
    padding-right: var(--spacing-xl, 32px);
  }

  .page-about-splash .splash-visual {
    justify-content: flex-end;
  }

  .page-about-splash .splash-visual img {
    max-width: 600px;
  }

  .story-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-2xl, 48px);
  }

  .story-index {
    order: 0;
    flex-direction: column;
    flex: 0 0 var(--about-index-width, 100px);
    border-bottom: none;
    border-right: 2px solid var(--color-border-light, #E0E0E0);
    padding: var(--spacing-lg, 24px) var(--spacing-md, 16px) var(--spacing-lg, 24px) 0;
    position: sticky;
    top: calc(var(--header-height, 56px) + 20px);
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .page-about .story-index .index-link {
    writing-mode: horizontal-tb;
    text-align: left;
    padding: 12px 16px;
    font-size: 16px;
    border: 2px solid transparent;
    background: transparent;
    border-radius: 0 var(--radius-md, 8px) var(--radius-md, 8px) 0;
  }

  .page-about .story-index .index-link:hover {
    background: var(--color-bg-light, #F0F8F0);
    border-color: var(--color-accent, #DC143C) transparent transparent transparent;
    border-left-color: var(--color-accent, #DC143C);
  }

  .story-content {
    order: 1;
    flex: 1 1 auto;
    min-width: 0;
  }

  .page-about .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .promise-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .story-block {
    padding: var(--spacing-3xl, 64px) 0;
  }

  .page-about .block-img {
    max-width: 400px;
  }
}

/* 较大桌面端微调 */
@media (min-width: 1200px) {
  .page-about-splash {
    padding: var(--spacing-3xl, 64px) var(--spacing-lg, 24px) 80px;
  }

  .story-layout {
    gap: 64px;
  }

  .story-index {
    flex: 0 0 120px;
  }
}