/* 作用域入口，确保只在本页生效 */
.about-page {
  --about-maxw: 1200px;
  --about-text: #333;
  --about-muted: #666;
  --about-border: #eee;
  --about-primary: var(--brand-primary); /* 使用全局品牌色变量 */
}

/* Section 基础 */
.about-section {
  padding: 30px 0;
}
.about-section-title {
  font-size: 28px;
  margin: 0 0 20px;
  color: var(--about-text);
}
.about-text p {
  margin: 0 0 12px;
  color: var(--about-muted);
}

/* 小标题与段落头部描述 */
.about-head { margin-bottom: 24px; }
.about-section-desc { margin: -8px 0 0; color: var(--about-muted); }

/* 时间轴（移除背景底色，保持与页面底色一致） */
.about-timeline { background: transparent; }

/* 里程碑卡片 */
.milestone {
  background: #fff;
  border: 1px solid var(--about-border);
  border-radius: 12px;
  padding: 18px;
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.milestone:hover {
  border-color: #d8e7ff;
  box-shadow: 0 6px 24px rgba(0,0,0,.06);
  transform: translateY(-2px);
}
.milestone .ms-year {
  display: inline-block;
  font-weight: 800;
  color: var(--about-primary);
  font-size: 14px;
  padding: 4px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, #f8faff, #eef4ff);
  border: 1px solid #dfe7ff;
  letter-spacing: -0.01em;
}
.milestone .ms-title {
  margin: 10px 0 6px;
  font-size: 16px;
  color: #111827;
  font-weight: 700;
}
.milestone .ms-desc {
  margin: 0;
  color: var(--about-muted);
  line-height: 1.8;
  font-size: 14px;
}

/* 里程碑多条描述列表 */
.milestone .ms-list {
  margin: 8px 0 0;
  padding-left: 18px;
  list-style: disc;
  color: #374151;
}
.milestone .ms-list li {
  margin: 6px 0;
  line-height: 1.75;
  font-size: 14px;
}

/* 横向时间线（单行 + 滚动捕捉） */
.h-timeline { position: relative; overflow: visible; } /* 允许卡片阴影完整展示 */
.h-track {
  display: grid;
  grid-auto-flow: column;
  /* 每张卡片的列宽，确保产生横向溢出 */
  grid-auto-columns: clamp(280px, 30vw, 360px);
  gap: 16px;
  overflow-x: auto;
  padding: 2px 24px 8px; /* 左右留白，首尾更自然 */
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none; /* Firefox 隐藏 */
}
.h-track::-webkit-scrollbar { display: none; }
.h-item { scroll-snap-align: start; }

/* 取消两侧渐隐遮罩，避免视觉覆盖感 */
.h-timeline::before,
.h-timeline::after { content: none; }

.h-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.06);
  background-color: rgba(0, 0, 0, 0.35); /* 提升对比度，浅底也清晰可见 */
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: -22px;
}
.h-arrow:hover { background-color: rgba(0, 0, 0, 0.55); }
.h-arrow:active { transform: translateY(-50%) scale(0.98); }
.h-arrow:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(0,0,0,0.25); }
.h-arrow:disabled { opacity: .35; cursor: not-allowed; background-color: rgba(0, 0, 0, 0.25); box-shadow: none; transform: translateY(-50%); }
.h-prev { left: 8px; }
.h-next { right: 8px; }

/* 使按钮内箭头与 Banner 一致的大小与权重 */
.h-arrow > span[aria-hidden="true"] {
  font-size: 20px;
  color: #fff;
  font-weight: 700;
  line-height: 1;
}

/* 发展历程卡片视觉优化（简约大气 | 白色系 | 大厂风格） */
.h-track {
  grid-auto-columns: clamp(320px, 32vw, 420px);
  gap: 20px;
}
.milestone {
  border-radius: 16px;
  padding: 22px 20px;
  border: 1px solid rgba(17,24,39,0.06);
  box-shadow: none; /* 初始无阴影 */
  background: #fff;
  text-align: left; /* 内容居左 */
  position: relative; /* 允许放置年份水印 */
}
.milestone:hover {
  border-color: #d8e7ff; /* 与其他卡片 hover 边框一致 */
  box-shadow: 0 6px 24px rgba(0,0,0,.06); /* 与其他卡片 hover 阴影一致 */
  transform: translateY(-2px);
}
.milestone:focus-within {
  outline: none;
  box-shadow: 0 0 0 3px rgba(30,111,255,0.15);
}
.milestone .ms-year {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 800;
  padding: 6px 12px;
  border-radius: 9999px;
  background: linear-gradient(180deg, #ffffff 0%, #fafbff 100%);
  border: 1px solid #e6ecf7;
  color: #111827;
  letter-spacing: 0.03em;
  font-variant-numeric: tabular-nums;
}
.milestone .ms-year::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--about-primary);
  box-shadow: 0 0 0 3px rgba(24,144,255,0.15);
}
.milestone .ms-title {
  font-size: 20px;
  font-weight: 800;
  color: #111827;
  margin: 10px 0 8px;
  letter-spacing: -0.01em;
}
.milestone .ms-list {
  list-style: none;
  padding-left: 0;
  margin: 14px 0 0;
  border-top: 1px solid rgba(17,24,39,0.06);
  padding-top: 12px;
  color: #4b5563;
}
.milestone .ms-list li {
  position: relative;
  padding-left: 16px;
  margin: 10px 0;
  line-height: 1.8;
  font-size: 14px;
}
.milestone .ms-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.9em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--about-primary);
  opacity: 0.22;
  transform: translateY(-50%);
}

/* 年份超淡水印（取自 aria-label），提升版面设计感 */
.milestone::after {
  content: attr(aria-label);
  position: absolute;
  top: 10px;
  right: 12px;
  font-size: 64px;
  font-weight: 800;
  line-height: 1;
  color: #111827;
  opacity: 0.045; /* 极淡，不干扰阅读 */
  letter-spacing: -0.02em;
  pointer-events: none;
}

@media (max-width: 640px) {
  .milestone::after { font-size: 44px; opacity: 0.04; right: 10px; top: 8px; }
  .milestone .ms-year { font-size: 13px; padding: 5px 10px; }
}

@media (max-width: 640px) {
  /* 小屏保留按钮，缩小尺寸以免遮挡内容；覆盖此前的隐藏规则 */
  .h-arrow { display: flex; width: 36px; height: 36px; margin-top: -18px; }
}

/* 优势网格 */
.about-values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.about-values-grid .value-card {
  border: 1px solid var(--about-border);
  border-radius: 10px;
  padding: 20px;
  background: #fff;
  transition: box-shadow .2s ease, transform .2s ease;
}
.about-values-grid .value-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,.06);
  transform: translateY(-2px);
}
.about-values-grid .value-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--about-text);
}
.about-values-grid .value-card p {
  margin: 0;
  color: var(--about-muted);
  line-height: 1.7;
}

/* 关键数据 KPI */
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.metric-card { background:#fff; border:1px solid var(--about-border); border-radius:12px; padding:24px; text-align:center; transition: box-shadow .2s ease, transform .2s ease; }
.metric-card:hover { box-shadow:0 6px 24px rgba(0,0,0,.06); transform: translateY(-2px); }
.metric-card .m-value { font-size: 32px; font-weight: 800; color:#111827; letter-spacing: -0.02em; }
.metric-card .m-label { margin-top: 6px; color: var(--about-muted); font-size: 14px; }

/* 资质与合规 */
.cert-list { list-style:none; padding:0; margin:0; display:flex; flex-wrap:wrap; gap:12px; }
.cert-item { display:inline-block; }
.cert-badge { display:inline-flex; align-items:center; height:36px; padding:0 14px; border-radius:999px; border:1px solid #e5e7eb; background:#fff; color:#374151; font-size:14px; }

/* 荣誉资质网格 */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 0; /* 与 about-head 统一 */
}
.honor-card {
  background: #fff;
  border: 1px solid var(--about-border);
  border-radius: 12px;
  padding: 18px;
  box-shadow: 0 2px 10px rgba(0,0,0,.04);
  transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.honor-card h3 { margin: 0 0 8px; font-size: 16px; color: #111827; }
.honor-card p { margin: 0; color: #6b7280; font-size: 14px; }
.honor-card:hover { border-color:#d8e7ff; box-shadow:0 6px 24px rgba(0,0,0,.08); transform: translateY(-2px); }

/* 响应式列数 */
@media (max-width: 1200px) {
  .honor-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .honor-grid { grid-template-columns: 1fr; }
}

/* 研发与制造（优化布局） */
.rnd-layout { 
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: 40px; 
  align-items: center;
  margin-top: 0; /* 与 about-head 统一 */
  justify-items: start;
}
.rnd-text .bullets { 
  margin: 20px 0 0; 
  padding-left: 0;
  list-style: none;
}
.rnd-text .bullets li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  color: var(--about-muted); 
  line-height: 1.8;
}
.rnd-text .bullets li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--about-primary);
  font-weight: bold;
}
.rnd-media { 
  width: 100%; 
  height: 280px; 
}
.rnd-photo { 
  width: 100%; 
  height: 100%; 
  display: block;
  border-radius: 12px; 
  border: 1px solid var(--about-border);
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0,0,0,.08);
}

/* 研发与制造文本左对齐 */
.rnd-text {
  text-align: left;
}

/* 产品矩阵 */
.prod-grid { display:grid; grid-template-columns: repeat(3, 1fr); gap:16px; }
.prod-card { display:block; text-decoration:none; background:#fff; border:1px solid var(--about-border); border-radius:12px; padding:18px; transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease; text-align:left; }
.prod-card h3 { margin:0 0 6px; font-size:18px; color:#111827; }
.prod-card p { margin:0; color:#6b7280; font-size:14px; }
.prod-card:hover { border-color:#d8e7ff; box-shadow:0 6px 24px rgba(0,0,0,.06); transform: translateY(-2px); }

/* 公司介绍 */
.intro-content {
  display: grid;
  grid-template-columns: 1fr; /* 改为上下布局 */
  gap: 20px;
  align-items: start;
  margin-top: 0; /* 与 about-head 统一 */
}
.intro-text p {
  margin: 0 0 16px;
  color: var(--about-muted);
  line-height: 1.8;
  font-size: 16px;
  max-width: 100%;
  text-align: left;
}
.intro-image {
  width: 100%;
  height: 300px;
}
.intro-image { position: relative; height: auto; margin-bottom: 24px; }
.intro-photo {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 12px;
  border: 1px solid var(--about-border);
  object-fit: cover;
  aspect-ratio: 21 / 7;
  object-position: center;
}
.metrics-panel {
  position: relative;
  z-index: 2;
  max-width: 88%;
  margin: -40px auto 0; /* 上半覆盖在图片里，下半落在图片下方 */
  background: #fff;
  border: 1px solid var(--about-border);
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0,0,0,.04);
  padding: 20px 28px;
}
.metrics-inline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.metric-item { text-align: center; padding: 6px 4px; }
.metric-item .m-value { color: inherit; font-weight: 800; font-size: 24px; letter-spacing: -0.02em; }
.metric-item .m-label { margin-top: 6px; color: var(--about-muted); font-size: 13px; }
.company-photo {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  background: url('../images/qiye.jpg') center/cover no-repeat;
  border: 1px solid var(--about-border);
}

/* 企业文化 */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 0; /* 与 about-head 统一 */
}
.culture-card {
  background: #fff;
  border: 1px solid var(--about-border);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  transition: box-shadow .2s ease, transform .2s ease;
}
.culture-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,.06);
  transform: translateY(-2px);
}
.culture-card h3 {
  margin: 0 0 12px;
  font-size: 18px;
  color: var(--about-text);
}
.culture-card p {
  margin: 0;
  color: var(--about-muted);
  line-height: 1.7;
  font-size: 14px;
}

/* 公司环境 */
.environment-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 0; /* 与 about-head 统一 */
}
.environment-item {
  height: 220px;
  border: 1px solid var(--about-border);
  border-radius: 12px;
  background: #f7f9ff;
  overflow: hidden;
  transition: box-shadow .2s ease, transform .2s ease;
}
.environment-item:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,.06);
  transform: translateY(-2px);
}

/* 公司环境图片（内联 img） */
.environment-img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* 产品应用场景 */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 0; /* 与 about-head 统一 */
}
.scenario-card {
  background: #fff;
  border: 1px solid var(--about-border);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
  transition: box-shadow .2s ease, transform .2s ease;
}
.scenario-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,.06);
  transform: translateY(-2px);
}
.scenario-card h3 {
  margin: 0 0 12px;
  font-size: 16px;
  color: var(--about-text);
}
.scenario-card p {
  margin: 0;
  color: var(--about-muted);
  line-height: 1.6;
  font-size: 14px;
}

/* CTA */
.about-cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--about-border);
  border-radius: 12px;
  padding: 24px;
  background: #fff;
}
.about-cta-box h2 {
  margin: 0 0 6px;
  color: var(--about-text);
}
.about-cta-box p {
  margin: 0;
  color: var(--about-muted);
}
.about-btn {
  display: inline-block;
  height: 40px;
  line-height: 40px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--about-primary);
  color: #fff;
  text-decoration: none;
  transition: background .2s ease, transform .1s ease;
}
.about-btn:hover { background: #1557cc; }
.about-btn:active { transform: translateY(1px); }
.about-btn.secondary {
  background: #f5f7ff;
  color: var(--about-primary);
}
.about-btn.secondary:hover { background: #ebefff; }

/* 进场动效（配合 JS 添加 .in-view） */
.about-section, .about-values-grid .value-card {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .5s ease, transform .5s ease;
}
.about-section.in-view, .about-values-grid .value-card.in-view,
.metrics-grid .metric-card.in-view, .prod-grid .prod-card.in-view, 
.culture-grid .culture-card.in-view, .scenarios-grid .scenario-card.in-view,
.cert-list .cert-item.in-view, .about-timeline-list .timeline-item.in-view {
  opacity: 1;
  transform: none;
}

/* 响应式 */
@media (max-width: 1024px) {
  .about-values-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  .culture-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
  .environment-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-content { grid-template-columns: 1fr; gap: 24px; }
  .rnd-layout { grid-template-columns: 1fr; gap: 24px; }
  .metrics-inline-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-photo { height: 280px; }
  .metrics-panel { margin-top: -32px; padding: 16px 20px; }
  .milestones { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .about-hero { padding: 56px 0 40px; }
  /* 使用通用hero-title样式，已移除特殊字体大小 */
  .about-section { padding: 40px 0; }
  .about-values-grid { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: 1fr; }
  .prod-grid { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .environment-grid { grid-template-columns: 1fr; }
  .intro-content { grid-template-columns: 1fr; }
  .rnd-layout { grid-template-columns: 1fr; }
  .about-cta-box { flex-direction: column; align-items: flex-start; }
  .intro-image { height: auto;  margin-bottom: 24px; }
  .rnd-media { height: 200px; }
  .environment-item { height: 180px; }
  .intro-photo { height: 200px; }
  .metrics-panel { margin-top: -24px; padding: 10px 14px; max-width: 96%; }
  .metrics-inline-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .metric-item .m-value { font-size: 20px; }
  .milestones { grid-template-columns: 1fr; }
}