/* ==========================================================================
   Page-specific styles（页面级特殊样式）
   ========================================================================== */

/* ---------- 面包屑 ---------- */
.breadcrumb-bar {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  row-gap: 4px;
}

.breadcrumb a,
.breadcrumb .current {
  white-space: nowrap;
}
.breadcrumb .current {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: var(--color-text-light); flex-shrink: 0; }
.breadcrumb .current { color: var(--color-text); }

/* ---------- 页面头部 Banner ---------- */
/* ===== 404 页面 ===== */
.not-found-wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}
.not-found-image {
  max-width: 360px;
  width: 80%;
  margin: 0 auto 24px;
  display: block;
}
.not-found-code {
  font-size: 6rem;
  color: var(--color-primary);
  margin: 0 0 16px;
  line-height: 1;
}
.not-found-title { margin: 0 0 16px; }
.not-found-desc {
  color: var(--color-text-muted);
  margin: 0 0 32px;
}
.not-found-actions {
  display: inline-flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ===== 客户案例详情页专属 ===== */
.case-cover {
  margin-bottom: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.case-cover img {
  width: 100%;
  height: auto;
  display: block;
}
.case-meta-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 40px;
  padding: 20px 24px;
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  margin-bottom: 40px;
  border-radius: var(--radius-sm);
}
.case-meta-item strong {
  display: block;
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: 2px;
}
.case-meta-item span {
  color: var(--color-primary);
  font-weight: 500;
}

/* hero 区可选 "eyebrow" 小标签（如 "客户：xxx"），位于 H1 上方 */
.page-hero .eyebrow-label {
  display: inline-block;
  color: var(--color-accent);
  font-size: var(--fs-sm);
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: .02em;
}

/* ==========================================================================
   v2.2 美观优化层
   工业 B2B 设计语言：克制、克制、再克制；少即是多；细节决定专业感
   ========================================================================== */

/* ---- 1. Section 节奏 ----
   桌面端给区块更多呼吸空间（B2B 站不缺内容缺的是视觉层级）*/
@media (min-width: 992px) {
  .section { padding: 96px 0; }
  .section-lg { padding: 140px 0; }
  .section-title { margin-bottom: 56px; }
  .section-title h2 {
    font-size: var(--fs-4xl);
    line-height: 1.25;
    letter-spacing: 0.5px;
  }
}

/* ---- 2. Section title 装饰升级 ----
   原是橙色实色短条；改为渐变 + 中心圆点，更像工业仪表的"基准刻度"*/
.section-title h2::after {
  width: 56px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-radius: 2px;
  margin-top: 18px;
  position: relative;
}

/* ---- 3. Section eyebrow 视觉强化 ----
   左右加细线，工业图纸感 */
.section-title .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}
.section-title .eyebrow::before,
.section-title .eyebrow::after {
  content: '';
  display: inline-block;
  width: 24px;
  height: 1px;
  background: currentColor;
  opacity: 0.5;
}

/* ---- 4. ~~Page Hero 蓝图网格叠加~~ —— 已撤销，保持原样 ---- */

/* ---- 5. Hero Banner（首页轮播）品质感叠加 ----
   slide 上方加细微亮线渐变 + 底部柔光，让深色文字层更立体 */
.hero-banner::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 120px;
  background: linear-gradient(180deg, transparent 0%, rgba(0,0,0,0.15) 100%);
  pointer-events: none;
  z-index: 2;
}

/* ---- 6. 数据带数字突出 ----
   桌面端把数字字号和粗细再拉一档，加细微辉光让"600+ 可检测气体"更有冲击力 */
@media (min-width: 992px) {
  .stats-number {
    font-size: clamp(2.5rem, 5vw, 4rem);
    text-shadow: 0 2px 8px rgba(255, 107, 53, 0.18);
  }
  .stats-number .suffix {
    font-size: 0.45em;
    margin-left: 6px;
  }
  .stats-label {
    font-size: var(--fs-lg);
    letter-spacing: 2px;
    margin-top: 6px;
  }
}

/* ---- 7. 产品卡片图片 hover 微缩放 ----
   工业产品图建议白底，缩放 1.04 给点活力但不抢眼 */
.product-item-image,
.news-card .news-cover {
  overflow: hidden;
  position: relative;
}
.product-item-image img,
.news-card .news-cover img {
  transition: transform 0.5s ease;
}
@media (hover: hover) {
  .product-item:hover .product-item-image img,
  .news-card:hover .news-cover img {
    transform: scale(1.04);
  }
}

/* ---- 8. 产品/方案/案例 卡片整体 hover 更柔和 ----
   原 translateY(-6px) 改 -4px，shadow 用 brand 色 + 高斯，更高级 */
@media (hover: hover) and (min-width: 768px) {
  .product-card:hover { transform: translateY(-4px); }
  .product-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(20, 54, 99, 0.12);
  }
  .solution-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(20, 54, 99, 0.12);
  }
  .news-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(20, 54, 99, 0.10);
  }
}

/* ---- 9. 解决方案卡片左下角工业切角 ----
   微小的 SVG 角线装饰，看似不起眼但提升精密感 */
.solution-card {
  position: relative;
  overflow: hidden;
}
.solution-card::after {
  content: '';
  position: absolute;
  right: 16px; top: 16px;
  width: 24px; height: 24px;
  border-top: 2px solid var(--color-accent);
  border-right: 2px solid var(--color-accent);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity var(--transition), transform var(--transition);
}
@media (hover: hover) {
  .solution-card:hover::after {
    opacity: 0.85;
    transform: translate(0, 0);
  }
}

/* ---- 10. Footer 顶部细线（橙→蓝渐变）----
   类似"封盖线"，把页脚跟内容区分明显 */
.site-footer {
  position: relative;
  border-top: 3px solid transparent;
  background-image:
    linear-gradient(var(--color-bg-dark), var(--color-bg-dark)),
    linear-gradient(90deg, var(--color-accent) 0%, var(--color-primary-light) 50%, var(--color-primary) 100%);
  background-origin: border-box;
  background-clip: padding-box, border-box;
}

/* ---- 11. 按钮 hover 涟漪光环（仅 accent 强调按钮）---- */
.btn-accent {
  position: relative;
}
.btn-accent::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 2px solid var(--color-accent);
  opacity: 0;
  transform: scale(1);
  transition: opacity 0.4s ease, transform 0.4s ease;
  pointer-events: none;
}
@media (hover: hover) {
  .btn-accent:hover::before {
    opacity: 0.5;
    transform: scale(1.08);
  }
}

/* ---- 12. 面包屑更精致 ----
   字号缩小，用斜杠分隔时颜色变浅，整条更有"导引线"感 */
.breadcrumb-bar {
  background: transparent;
}
.breadcrumb {
  font-size: var(--fs-sm);
  color: var(--color-text-light);
  padding: 14px 0;
}
.breadcrumb a {
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep {
  color: var(--color-border-dark);
  opacity: 0.5;
  margin: 0 8px;
}
.breadcrumb .current { color: var(--color-primary); font-weight: 500; }

/* ---- 13. 标题字距优化（中文加宽，更松弛）---- */
h1, h2, h3, .section-title h2, .page-hero h1 {
  letter-spacing: 0.04em;
}
.btn { letter-spacing: 0.06em; }

/* ---- 14. 媒体小屏 spacing 调整（对应 v2.2 桌面增大的 padding）---- */
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { margin-bottom: 36px; }
  .section-title h2 { font-size: var(--fs-3xl); }
}

/* ---- 15. Floating Aside（右下悬浮客服）阴影柔化 ---- */
.floating-aside { filter: drop-shadow(0 8px 20px rgba(20, 54, 99, 0.12)); }

/* ==========================================================================
   v2.5 移动端定向加固
   ========================================================================== */

/* a. body 留出底部空间，避免 mobile-bottom-bar 遮挡内容（移动端 only）*/
@media (max-width: 767px) {
  body { padding-bottom: 68px; }
  /* footer 底部 © 区也补一点空间防紧贴 bar */
  .footer-bottom { padding-bottom: 8px; }
}

/* b. 防 iOS 自动缩放：所有可输入控件最小字号 16px */
@media (max-width: 767px) {
  input[type="text"],
  input[type="search"],
  input[type="email"],
  input[type="tel"],
  input[type="url"],
  input[type="number"],
  input[type="password"],
  textarea,
  select {
    font-size: 16px !important;
  }
}

/* c. 全局兜底：防溢出 */
@media (max-width: 767px) {
  input, select, textarea, button {
    max-width: 100%;
    box-sizing: border-box;
  }
  /* 长 URL/代码块的 word-break */
  pre, code, .article-body { overflow-wrap: break-word; }
}

/* d. 触摸目标加大 */
@media (max-width: 767px) {
  /* Hero 翻页圆点：40×4 → 44×44 (内含 8×8 视觉圆点) */
  .hero-dots {
    gap: 2px;
    padding: 0 8px;
  }
  .hero-dots button {
    width: 44px;
    height: 44px;
    background: transparent !important;
    border: none;
    position: relative;
    cursor: pointer;
    padding: 0;
  }
  .hero-dots button::after {
    content: '';
    position: absolute;
    left: 50%; top: 50%;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    transform: translate(-50%, -50%);
    transition: background 0.2s ease, width 0.2s ease;
  }
  .hero-dots button.active::after {
    background: var(--color-accent);
    width: 24px;
    border-radius: 4px;
  }

  /* Hero 左右箭头：原 40×40 加大到 44×44 + 半透明底 */
  .hero-arrow {
    width: 44px;
    height: 44px;
  }

  /* 面包屑：移动端紧凑显示，长标题省略号截断 */
  .breadcrumb {
    padding: 8px 0;
    gap: 4px;
    row-gap: 2px;
    line-height: 1.5;
  }
  .breadcrumb a,
  .breadcrumb .current {
    display: inline-block;
    padding: 8px 4px;
    min-height: 36px;
    white-space: nowrap;
    line-height: 1.4;
  }
  .breadcrumb .sep {
    margin: 0 2px;
  }

  /* 产品搜索按钮：30×30 → 40×40 */
  .product-search-inline button {
    width: 40px;
    height: 40px;
  }

  /* mega-menu / sub-menu link 移动端展开后高度 */
  .primary-nav .mega-menu a,
  .primary-nav .sub-menu a,
  .primary-nav .mega-cate-type li a,
  .primary-nav .gas-item {
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 10px 14px !important;
  }

  /* 顶部导航 link 高度（确保 44） */
  .primary-nav > li > a {
    min-height: 48px;
    padding: 0 16px;
  }

  /* 通用 .btn 移动端最小高度（btn-sm 不受影响）*/
  .btn { min-height: 44px; }
  .btn-sm { min-height: 36px; }
}

/* e. 联系页表单防溢出（contact form 7 默认样式可能撑出）*/
@media (max-width: 767px) {
  .wpcf7,
  .wpcf7-form,
  .wpcf7-form-control-wrap,
  .contact-form-grid {
    max-width: 100%;
    overflow: hidden;
  }
  .wpcf7-form input,
  .wpcf7-form select,
  .wpcf7-form textarea {
    width: 100% !important;
    max-width: 100%;
    box-sizing: border-box;
  }
  .contact-info-list,
  .contact-info-list .item {
    max-width: 100%;
    word-wrap: break-word;
  }
}

/* 极小屏（≤360px）兜底：联系页所有元素强制不撑出 */
@media (max-width: 360px) {
  .page-contact .container,
  .page-contact .container * {
    max-width: 100%;
    box-sizing: border-box;
  }
  body { overflow-x: hidden; }
}

/* f. Hero banner 移动端高度收紧 */
@media (max-width: 600px) {
  .hero-banner {
    height: 420px;
    min-height: 420px;
  }
  .hero-slide h1 {
    font-size: clamp(1.6rem, 6.5vw, 2.2rem);
    line-height: 1.3;
  }
  .hero-slide .lead {
    font-size: var(--fs-base);
  }
  .hero-slide .ctas {
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
  }
  .hero-slide .ctas .btn {
    flex: 1 1 calc(50% - 5px);
    min-width: 0;
    white-space: nowrap;
  }
}

/* g. 产品/方案 hero 顶部留白 + 标题字号 */
@media (max-width: 600px) {
  .page-hero {
    padding: 56px 0 40px;
  }
  .page-hero h1 {
    font-size: clamp(1.6rem, 6vw, 2rem);
  }
}

/* h. footer 移动端 cols 改为单列 + gap 收紧 */
@media (max-width: 600px) {
  .footer-cols {
    gap: 28px;
  }
  .footer-col h4 {
    margin-bottom: 12px;
  }
}

/* i. 表格移动端横滚兜底（参数表/产品规格） */
@media (max-width: 767px) {
  .article-body table,
  .param-table table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
}

/* j. 数据带 stats 移动端：保持 2 列但字号收紧 */
@media (max-width: 767px) {
  .stats-bar { padding: 40px 0; }
  .stats-grid { gap: 20px 8px; }
  .stats-item { border-right: none; padding: 0; }
  .stats-number { font-size: clamp(1.8rem, 7vw, 2.4rem) !important; }
  .stats-label { font-size: var(--fs-xs); letter-spacing: 0; }
}

/* k. 浮动客服移动端不要太挤（避免跟 mobile-bottom-bar 重叠）*/
@media (max-width: 767px) {
  .floating-aside {
    bottom: 80px !important;  /* 高于 bottom-bar 62px + 18 间距 */
  }
}

/* l. 产品/案例/新闻 hover 在触摸设备上别黏住 */
@media (hover: none) {
  .product-card,
  .product-item,
  .solution-card,
  .news-card,
  .case-card {
    transform: none !important;
  }
}

/* m. 联系卡片 320 极小屏内距收紧（修 326px 溢出）*/
@media (max-width: 360px) {
  .contact-info-card,
  .contact-form-card {
    padding: 24px 20px;
    min-width: 0;
  }
}

/* ==========================================================================
   v2.6 可访问性 + 性能 + 打印
   ========================================================================== */

/* 1. 跳到主要内容（屏幕阅读器 / 键盘用户首次 Tab 看到）*/
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: var(--z-modal);
  background: var(--color-primary);
  color: #fff;
  padding: 12px 18px;
  border-radius: 0 0 var(--radius) 0;
  font-weight: 500;
  text-decoration: none;
}
.skip-link:focus {
  left: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 0;
}

/* 2. 平滑锚点滚动（"回到顶部"等）*/
html { scroll-behavior: smooth; }

/* 3. 焦点可见性（键盘导航 a11y）—— 替代浏览器默认的难看蓝框 */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}
/* input/button 自身已经有专门 focus 处理的不要被这条覆盖 */
.btn:focus-visible,
.header-pill-search:focus-within,
.product-search-inline:focus-within,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline-offset: 0;
}

/* 4. prefers-reduced-motion：尊重系统"减少动画"偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  html { scroll-behavior: auto; }
}

/* 5. 打印样式（B2B 经常打印产品规格/案例存档）*/
@media print {
  .top-bar,
  .site-header,
  .site-footer,
  .floating-aside,
  .mobile-bottom-bar,
  .back-to-top,
  .hero-banner,
  .hero-arrow,
  .hero-dots,
  .breadcrumb-bar,
  .header-pill-search,
  .ctas,
  .article-cta,
  .section-cta-center,
  .search-overlay {
    display: none !important;
  }
  body {
    background: #fff !important;
    color: #000 !important;
    font-size: 11pt;
    line-height: 1.5;
  }
  .container { max-width: 100%; padding: 0; }
  .section { padding: 16pt 0 !important; }
  .page-hero {
    background: #fff !important;
    color: #000 !important;
    padding: 0 0 12pt;
    border-bottom: 2pt solid #000;
    margin-bottom: 18pt;
  }
  .page-hero h1 { color: #000 !important; font-size: 22pt; }
  .page-hero .subtitle { color: #444 !important; }
  h1, h2, h3, h4 { page-break-after: avoid; color: #000 !important; }
  table { page-break-inside: avoid; }
  img { max-width: 100% !important; page-break-inside: avoid; }
  a {
    color: #000 !important;
    text-decoration: underline;
  }
  /* 链接后显示 URL（PDF/打印纸面易追溯）*/
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 9pt;
    color: #666;
  }
  a[href^="#"]::after,
  a[href^="tel:"]::after,
  a[href^="mailto:"]::after { content: ""; }
  /* 卡片打印用清单形式 */
  .product-card,
  .solution-card,
  .news-card,
  .case-card,
  .product-item {
    border: 1pt solid #ccc !important;
    box-shadow: none !important;
    page-break-inside: avoid;
    margin-bottom: 8pt;
    transform: none !important;
  }
  /* 显示 mailto 后的实际邮箱 */
  .article-meta { font-size: 10pt; color: #666; }
}

.page-hero {
  padding: 80px 0 60px;
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cdefs%3E%3Cpattern id='dots' width='30' height='30' patternUnits='userSpaceOnUse'%3E%3Ccircle cx='2' cy='2' r='1' fill='%23fff' opacity='0.15'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='100' height='100' fill='url(%23dots)'/%3E%3C/svg%3E");
  opacity: 0.5;
}

.page-hero .container {
  position: relative;
}

.page-hero h1 {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  margin-bottom: 12px;
}

.page-hero .subtitle {
  font-size: var(--fs-md);
  opacity: 0.85;
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- 产品中心：分类导航 + 列表（FPI 聚光科技风格的大块卡片侧边栏） ---------- */
.product-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
}

@media (max-width: 991px) {
  .product-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .product-layout--sub > .category-sidebar { display: none; }
  .product-layout--index > div:not(.category-sidebar),
  .product-layout--top > div:not(.category-sidebar) { display: none; }
}

.category-sidebar {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: 0;
  height: max-content;
  /* 整页一起滚 — 聚光科技同款行为；避免侧边栏过高时底部子项被视口截断 */
}

.category-sidebar h3 {
  padding: 0 4px 16px;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
  margin: 0 0 4px;
  letter-spacing: 0.5px;
}
/* 行业组列表：与上方产品分类组之间留白 + 顶部分割线
   双类 .cat-card-list.cat-card-list--industries 提升特异性，避免被后定义的 .cat-card-list { margin:0 } 覆盖 */
.category-sidebar .cat-card-list.cat-card-list--industries {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border, #e2e8f0);
}

.category-sidebar .cat-card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* 每条分类 = 一个独立大卡片按钮（FPI 风格） */
.category-sidebar .cat-item {
  background: #fff;
  border: 1.5px solid var(--color-border, #e2e8f0);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.category-sidebar .cat-item:hover {
  border-color: var(--color-primary, #1E4B8F);
  box-shadow: 0 4px 12px rgba(30, 75, 143, .08);
}

/* 激活状态：品牌蓝填充 + 白字 */
.category-sidebar .cat-item.active {
  background: var(--color-primary, #1E4B8F);
  border-color: var(--color-primary, #1E4B8F);
  box-shadow: 0 6px 18px rgba(30, 75, 143, .25);
}

/* 组首永久蓝卡（"全部产品"、"按行业找方案"）— 与激活态视觉完全一致
   使用双类 .cat-item.cat-item--section-head 提升特异性，确保覆盖默认白底 */
.category-sidebar .cat-item.cat-item--section-head {
  background: var(--color-primary, #1E4B8F);
  border-color: var(--color-primary, #1E4B8F);
  box-shadow: 0 6px 18px rgba(30, 75, 143, .25);
}
.category-sidebar .cat-item.cat-item--section-head:hover {
  border-color: var(--color-primary, #1E4B8F);
  box-shadow: 0 8px 22px rgba(30, 75, 143, .35);
}

.category-sidebar .cat-item > .cat-row {
  display: flex;
  align-items: stretch;
  min-height: 56px;
}

.category-sidebar .cat-item .cat-link {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  color: var(--color-text, #1a2332);
  font-size: 15px;
  font-weight: 600;
  min-width: 0;
  text-decoration: none;
  transition: color .2s ease;
}

.category-sidebar .cat-item.active .cat-link,
.category-sidebar .cat-item.cat-item--section-head .cat-link { color: #fff; }

.category-sidebar .cat-icon {
  flex: 0 0 22px;
  color: var(--color-primary, #1E4B8F);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .2s ease;
}
.category-sidebar .cat-item.active .cat-icon,
.category-sidebar .cat-item.cat-item--section-head .cat-icon { color: #fff; }
.category-sidebar .cat-icon svg { stroke-width: 1.8; }

.category-sidebar .cat-name {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.category-sidebar .count {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-light, #94a3b8);
  background: #f1f5f9;
  padding: 3px 9px;
  border-radius: 10px;
}
.category-sidebar .cat-item.active .count,
.category-sidebar .cat-item.cat-item--section-head .count {
  color: var(--color-primary, #1E4B8F);
  background: rgba(255,255,255,.92);
}

/* 展开/收起按钮 */
.category-sidebar .cat-toggle {
  flex: 0 0 48px;
  background: transparent;
  border: 0;
  border-left: 1px solid var(--color-border, #e2e8f0);
  cursor: pointer;
  padding: 0;
  color: var(--color-text-muted, #64748b);
  font-size: 22px;
  font-weight: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .2s ease, background .2s ease, transform .25s ease;
  line-height: 1;
}
.category-sidebar .cat-item.active .cat-toggle {
  color: rgba(255,255,255,.9);
  border-left-color: rgba(255,255,255,.25);
}
.category-sidebar .cat-toggle:hover { background: rgba(0,0,0,.04); }
.category-sidebar .cat-item.active .cat-toggle:hover { background: rgba(255,255,255,.12); }
.category-sidebar .cat-item.expanded .cat-toggle .arrow {
  display: inline-block;
  transform: rotate(45deg); /* + → × 视觉表达"展开" */
}

/* 子分类列表：默认折叠，.expanded 才展开 */
.category-sidebar .cat-item .sub-list {
  background: rgba(255,255,255,.06);
  list-style: none;
  margin: 0;
  padding: 0 12px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .25s ease;
}
.category-sidebar .cat-item:not(.active) .sub-list { background: #fafbfc; }

.category-sidebar .cat-item.expanded .sub-list {
  max-height: 2000px;
  padding: 8px 12px 14px;
  border-top: 1px solid rgba(0,0,0,.04);
}
.category-sidebar .cat-item.active.expanded .sub-list {
  border-top-color: rgba(255,255,255,.18);
}

.category-sidebar .sub-list li a {
  display: block;
  padding: 8px 12px 8px 38px;
  font-size: 13.5px;
  color: var(--color-text-muted, #64748b);
  text-decoration: none;
  border-radius: 6px;
  transition: background .15s ease, color .15s ease;
}
/* 行业子项：方案 vs 案例 小标签 */
.category-sidebar .sub-list--mixed li a {
  padding-left: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.5;
}
.category-sidebar .sub-tag {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  letter-spacing: 0.3px;
}
.category-sidebar .sub-tag--solution {
  color: var(--color-primary, #1E4B8F);
  background: rgba(30, 75, 143, .1);
}
.category-sidebar .sub-tag--case {
  color: var(--color-accent, #FF6B35);
  background: rgba(255, 107, 53, .1);
}
.category-sidebar .cat-item.active .sub-list li a { color: rgba(255,255,255,.85); }

.category-sidebar .sub-list li a:hover,
.category-sidebar .sub-list li.active a {
  background: rgba(30,75,143,.08);
  color: var(--color-primary, #1E4B8F);
}
.category-sidebar .cat-item.active .sub-list li a:hover,
.category-sidebar .cat-item.active .sub-list li.active a {
  background: rgba(255,255,255,.18);
  color: #fff;
}

/* 产品列表网格 */
.product-list-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 1199px) {
  .product-list-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 575px) {
  .product-list-grid { grid-template-columns: 1fr; }
}

.product-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  color: var(--color-text);
}

@media (hover: hover) and (min-width: 768px) {
  .product-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
    color: var(--color-text);
  }
  .product-item:hover .product-item-image img,
  .product-item:hover .product-item-image .placeholder {
    transform: scale(1.08);
  }
}

@media (max-width: 767px), (hover: none) {
  .product-item:active {
    transform: scale(0.98);
  }
}

.product-item-image {
  aspect-ratio: 4/3;
  background: var(--color-bg-alt);  /* 浅灰底，与下方文字区形成视觉分隔 */
  overflow: hidden;
  position: relative;
}

/* picture 默认 inline，会让子 img 的 height:100% 失效，强制 block 撑满容器 */
.product-item-image picture {
  display: block;
  width: 100%;
  height: 100%;
}

.product-item-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;        /* 完整显示产品图，不裁切 */
  object-position: center;    /* 在 4:3 框内水平+垂直居中 */
  transition: transform 0.6s ease;
}

.product-item-image .placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.product-item-image .placeholder {
  background: linear-gradient(135deg, var(--color-primary-lighter) 0%, #fff 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: 600;
}

.product-item .tag-ribbon {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  gap: 6px;
}

.product-item .tag-ribbon .tag {
  font-size: var(--fs-xs);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: #fff;
  font-weight: 500;
}

.product-item-body {
  padding: 18px 22px;
}

.product-item-series {
  font-size: var(--fs-xs);
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.product-item h4 {
  font-size: var(--fs-lg);
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-item p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin-bottom: 12px;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-item-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.product-item-foot .link {
  font-size: var(--fs-sm);
  color: var(--color-primary);
  font-weight: 500;
}

.product-item-foot .arrow-icon {
  color: var(--color-text-light);
  transition: transform var(--transition);
}

.product-item:hover .arrow-icon {
  color: var(--color-primary);
  transform: translateX(4px);
}

/* ---------- 产品详情页 ---------- */
.product-detail-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 48px 0;
}

@media (max-width: 991px) {
  .product-detail-head { grid-template-columns: 1fr; gap: 32px; }
}

.product-gallery .main-img {
  aspect-ratio: 1/1;
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-weight: 600;
}

.product-gallery .thumbs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.product-gallery .thumb {
  aspect-ratio: 1/1;
  background: var(--color-bg-alt);
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  transition: border-color var(--transition-fast);
}

.product-gallery .thumb.active,
.product-gallery .thumb:hover {
  border-color: var(--color-primary);
}

.product-info .series-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  font-size: var(--fs-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.product-info h1 {
  font-size: var(--fs-3xl);
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--color-text);
}

.product-info .lead {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.product-info .feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.product-info .feature-tags .tag {
  padding: 6px 14px;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  font-size: var(--fs-sm);
  border-radius: var(--radius);
}

.product-info .inquiry-box {
  padding: 20px 24px;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-accent);
  margin-bottom: 20px;
}

.product-info .inquiry-box .label {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.product-info .inquiry-box .phone {
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 1px;
}

.product-info .cta-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---------- 子型号 Tab ---------- */
.submodel-section {
  padding: 40px 0;
  background: var(--color-bg-alt);
}

/* 产品参数表下方：工程师换算工具微入口 */
.product-tool-hint {
  margin: 28px auto 0;
  padding: 14px 20px;
  background: linear-gradient(135deg, #fff8f4 0%, #fff 70%);
  border: 1px dashed #f4b896;
  border-radius: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.product-tool-hint-icon { font-size: 18px; flex: 0 0 auto; }
.product-tool-hint-text { color: #475569; flex: 1 1 auto; min-width: 0; }
.product-tool-hint-text strong { color: var(--color-primary, #1E4B8F); font-weight: 600; }
.product-tool-hint-link {
  color: var(--color-accent, #FF6B35);
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  border-bottom: 1px dashed transparent;
  transition: border-color .2s;
}
.product-tool-hint-link:hover { border-bottom-color: var(--color-accent, #FF6B35); }
@media (max-width: 640px) {
  .product-tool-hint { padding: 12px 14px; font-size: 13px; }
  .product-tool-hint-link { width: 100%; text-align: right; }
}

.submodel-tabs {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 32px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.submodel-tab {
  padding: 14px 28px;
  font-size: var(--fs-md);
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
}

.submodel-tab.active,
.submodel-tab:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.submodel-tab .code {
  display: block;
  font-size: var(--fs-xs);
  color: var(--color-text-light);
  font-weight: 400;
  margin-top: 2px;
}

.submodel-tab.active .code,
.submodel-tab:hover .code {
  color: var(--color-primary);
}

.submodel-panel {
  display: none;
}

.submodel-panel.active {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 32px;
  animation: fadeInUp 0.4s ease both;
}

@media (max-width: 767px) {
  .submodel-panel.active {
    grid-template-columns: 1fr;
  }
}

.submodel-image {
  aspect-ratio: 4/3;
  background: #fff;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

/* 参数表 */
.param-table {
  width: 100%;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  font-size: var(--fs-sm);
}

.param-table .group-title {
  padding: 12px 20px;
  background: var(--color-primary);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 1px;
}

.param-table table {
  width: 100%;
  border-collapse: collapse;
}

.param-table td {
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-border);
}

.param-table td:first-child {
  width: 35%;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  font-weight: 500;
}

.param-table td:last-child {
  color: var(--color-text);
}

.param-table tr:last-child td {
  border-bottom: none;
}

/* 产品描述区 */
.product-desc {
  padding: 60px 0;
}

.product-desc h2 {
  font-size: var(--fs-2xl);
  color: var(--color-primary);
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 4px solid var(--color-accent);
}

.product-desc p {
  font-size: var(--fs-md);
  color: var(--color-text);
  line-height: 1.9;
  margin-bottom: 16px;
}

.product-desc ul {
  padding-left: 20px;
  margin-bottom: 20px;
}

.product-desc ul li {
  list-style: disc;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.8;
}

/* ---------- 关于我们 ---------- */
.about-intro {
  padding: 64px 0;
}

.about-intro .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

@media (max-width: 991px) {
  .about-intro .container { grid-template-columns: 1fr; }
}

.about-text h2 {
  font-size: var(--fs-3xl);
  margin-bottom: 24px;
  color: var(--color-text);
}

.about-text p {
  color: var(--color-text-muted);
  line-height: 2;
  margin-bottom: 16px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

@media (max-width: 767px) {
  .values-grid { grid-template-columns: 1fr; }
}

.value-card {
  text-align: center;
  padding: 32px 20px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.value-card .icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 16px;
}

.value-card h4 {
  font-size: var(--fs-xl);
  margin-bottom: 8px;
  color: var(--color-text);
}

.value-card p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin: 0;
}

/* 发展历程时间轴 */
.timeline {
  position: relative;
  padding: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
  transform: translateX(-50%);
}

@media (max-width: 767px) {
  .timeline::before { left: 20px; }
}

.timeline-item {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 32px;
  align-items: center;
  margin-bottom: 32px;
  position: relative;
}

@media (max-width: 767px) {
  .timeline-item {
    grid-template-columns: auto 1fr;
    padding-left: 0;
    gap: 16px;
  }
}

.timeline-item .year-dot {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-sm);
  font-weight: 700;
  grid-column: 2;
  z-index: 1;
  box-shadow: 0 0 0 6px var(--color-bg);
}

@media (max-width: 767px) {
  .timeline-item .year-dot { grid-column: 1; }
}

.timeline-item .content {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.timeline-item:nth-child(odd) .content {
  grid-column: 1;
  text-align: right;
}

.timeline-item:nth-child(even) .content {
  grid-column: 3;
}

@media (max-width: 767px) {
  .timeline-item:nth-child(odd) .content,
  .timeline-item:nth-child(even) .content {
    grid-column: 2;
    text-align: left;
  }
}

.timeline-item .content h4 {
  font-size: var(--fs-lg);
  color: var(--color-primary);
  margin-bottom: 6px;
}

.timeline-item .content p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.7;
}

/* ---------- 联系我们 ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  padding: 64px 0;
}

@media (max-width: 991px) {
  .contact-layout { grid-template-columns: 1fr; }
}

.contact-info-card {
  background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
  color: #fff;
  padding: 40px;
  border-radius: var(--radius-lg);
}

.contact-info-card h3 {
  color: #fff;
  font-size: var(--fs-2xl);
  margin-bottom: 8px;
}

.contact-info-card .subtitle {
  opacity: 0.85;
  margin-bottom: 32px;
}

.contact-info-list .item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  align-items: flex-start;
}

.contact-info-list .item:last-child {
  border-bottom: none;
}

.contact-info-list .icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-accent);
}

.contact-info-list .label {
  font-size: var(--fs-xs);
  opacity: 0.7;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.contact-info-list .value {
  font-size: var(--fs-md);
  font-weight: 500;
  line-height: 1.5;
}

.contact-info-list .phone-value {
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--color-accent);
}

/* 联系表单 */
.contact-form-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-form-card h3 {
  font-size: var(--fs-2xl);
  margin-bottom: 8px;
  color: var(--color-text);
}

.contact-form-card .subtitle {
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 575px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  font-size: var(--fs-sm);
  margin-bottom: 6px;
  color: var(--color-text);
  font-weight: 500;
}

.form-field label .req {
  color: var(--color-accent);
  margin-left: 2px;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--fs-md);
  transition: border-color var(--transition-fast);
  background: var(--color-bg);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 75, 143, 0.1);
}

.form-field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-field .hint {
  font-size: var(--fs-xs);
  color: var(--color-text-light);
  margin-top: 4px;
}

/* ---------- 新闻详情 ---------- */
/* 封面图与方案详情 .case-cover 同款：narrow 容器内 100% 宽，圆角+阴影卡片感 */
.article-cover {
  margin-bottom: 40px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.article-cover img {
  width: 100%;
  height: auto;
  display: block;
}

.article-head {
  text-align: center;
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 40px;
}

.article-head h1 {
  font-size: var(--fs-4xl);
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--color-text);
}

.article-meta {
  display: inline-flex;
  gap: 20px;
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.article-body {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 24px 80px;
  font-size: var(--fs-md);
  line-height: 1.95;
  color: var(--color-text);
}

.article-body h2 {
  font-size: var(--fs-2xl);
  color: var(--color-primary);
  margin: 32px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--color-accent);
}

.article-body h3 {
  font-size: var(--fs-xl);
  margin: 24px 0 12px;
  color: var(--color-text);
}

.article-body p {
  margin-bottom: 18px;
}

.article-body img {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 20px auto;
  display: block;
}

.article-body ul, .article-body ol {
  padding-left: 24px;
  margin-bottom: 18px;
}

.article-body ul li { list-style: disc; margin-bottom: 8px; }
.article-body ol li { list-style: decimal; margin-bottom: 8px; }

/* ---------- 新闻列表 ---------- */
.news-list {
  padding: 48px 0;
}

.news-list-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 24px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  transition: all var(--transition);
  color: var(--color-text);
}

@media (max-width: 767px) {
  .news-list-item { grid-template-columns: 1fr; }
}

.news-list-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
  color: var(--color-text);
}

.news-list-item .cover {
  aspect-ratio: 4/3;
  background: var(--color-bg-alt);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.news-list-item h3 {
  font-size: var(--fs-xl);
  margin-bottom: 10px;
  line-height: 1.4;
}

.news-list-item .meta {
  display: flex;
  gap: 16px;
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.news-list-item .excerpt {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 40px 0 0;
}

.pagination a,
.pagination span {
  min-width: 40px;
  height: 40px;
  padding: 0 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--fs-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.pagination a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.pagination .current {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ==========================================================================
   品牌色块 fallback — 统一的图像占位（取代 emoji 占位）
   ========================================================================== */
.brand-block {
  width: 100%;
  height: 100%;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  border-radius: 12px;
  color: #fff;
  text-align: center;
  font-weight: 600;
  letter-spacing: 0.02em;
  overflow: hidden;
  position: relative;
  user-select: none;
}

.brand-block::before {
  /* 斜线纹理 */
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.05),
    rgba(255, 255, 255, 0.05) 10px,
    transparent 10px,
    transparent 20px
  );
  pointer-events: none;
}

.brand-block--primary {
  background: linear-gradient(135deg, #1E4B8F 0%, #2E6FC4 100%);
  font-size: 2.2rem;
}

.brand-block--accent {
  background: linear-gradient(135deg, #FF6B35 0%, #FF8A5C 100%);
  font-size: 2rem;
}

.brand-block--soft {
  background: linear-gradient(135deg, #EAF1FB 0%, #D5E4F7 100%);
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 500;
}

.brand-block--tall {
  min-height: 360px;
  font-size: 2.4rem;
  gap: 12px;
}

.brand-block-label {
  position: relative;
  font-size: 2.6rem;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.brand-block-sub {
  position: relative;
  font-size: 1rem;
  font-weight: 400;
  opacity: 0.92;
  letter-spacing: 0.02em;
}

/* 小尺寸场景（分类/行业图标槽位） */
.product-card-icon .brand-block,
.solution-icon .brand-block,
.value-card .icon .brand-block {
  min-height: 72px;
  width: 72px;
  height: 72px;
  border-radius: 14px;
  margin: 0 auto;
  padding: 8px;
}

.product-card-icon .brand-block,
.solution-icon .brand-block {
  font-size: 1.8rem;
}

.value-card .icon .brand-block {
  font-size: 2rem;
}

/* 产品卡片 / 新闻卡片 fallback 默认撑满槽位 */
.product-item-image .brand-block,
.news-cover .brand-block {
  min-height: 100%;
  border-radius: 0;
}

/* 可替换的 intro 实景图：完全铺满容器，不要 min/max-height 制造蓝边 */
.intro-visual .intro-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 行业/产品小图标（ACF/term meta 有图时）—— 比容器小一圈给视觉呼吸 */
.product-card-icon img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}
.solution-icon img {
  width: 68px;
  height: 68px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
}
@media (max-width: 600px) {
  .product-card-icon img { width: 56px; height: 56px; }
  .solution-icon img { width: 48px; height: 48px; }
}

/* ============================================================
   白皮书下载（解决方案归档页底部 + 电话门弹窗）          v2.9.0
   ============================================================ */
.whitepaper-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);  /* 4×4 网格放下 16 行业白皮书 */
  gap: 24px;
}
@media (max-width: 1280px) { .whitepaper-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 1024px) { .whitepaper-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .whitepaper-grid { grid-template-columns: 1fr; gap: 20px; } }

.whitepaper-card {
  background: #fff;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 14px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.whitepaper-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 36px rgba(30, 75, 143, .12);
  border-color: var(--color-primary, #1E4B8F);
}
.whitepaper-card-cover {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #f0f4f9 0%, #fff8f4 100%);
  overflow: hidden;
}
.whitepaper-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.whitepaper-card-cover-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary, #1E4B8F);
}
.whitepaper-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  background: var(--color-accent, #FF6B35);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  letter-spacing: .5px;
}
.whitepaper-card-body {
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.whitepaper-card-industry {
  color: var(--color-accent, #FF6B35);
  font-size: var(--fs-sm, 14px);
  font-weight: 500;
}
.whitepaper-card-body h4 {
  font-size: var(--fs-lg, 18px);
  margin: 0;
  line-height: 1.4;
}
.whitepaper-card-body p {
  color: var(--color-text-muted, #666);
  font-size: var(--fs-sm, 14px);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}
.whitepaper-card-body .btn {
  margin-top: 8px;
}

.btn-block { display: block; width: 100%; text-align: center; }

/* ---------- 电话门弹窗 ---------- */
.whitepaper-modal[hidden] { display: none !important; }
.whitepaper-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.whitepaper-modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, .55);
  backdrop-filter: blur(2px);
}
.whitepaper-modal-dialog {
  position: relative;
  width: min(560px, 100%);
  max-height: 92vh;
  overflow-y: auto;
  background: #fff;
  border-radius: 14px;
  padding: 32px 32px 28px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .25);
  animation: wpModalIn .25s ease-out;
}
@keyframes wpModalIn {
  from { opacity: 0; transform: translateY(20px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.whitepaper-modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  font-size: 28px;
  line-height: 1;
  color: #94a3b8;
  cursor: pointer;
  border-radius: 50%;
  transition: background .2s ease, color .2s ease;
}
.whitepaper-modal-close:hover { background: #f1f5f9; color: #0f172a; }

.whitepaper-modal-head h3 {
  margin: 0 0 6px;
  font-size: 22px;
  color: var(--color-primary, #1E4B8F);
}
.whitepaper-modal-target {
  font-weight: 500;
  color: #0f172a;
  margin: 0 0 8px;
}
.whitepaper-modal-sub {
  color: #64748b;
  font-size: 13px;
  margin: 0 0 18px;
  line-height: 1.6;
}

.whitepaper-modal-form .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 12px;
}
@media (max-width: 480px) {
  .whitepaper-modal-form .form-row { grid-template-columns: 1fr; }
  .whitepaper-modal-dialog { padding: 24px 20px 22px; }
}
.whitepaper-modal-form .form-field { margin-bottom: 12px; }
.whitepaper-modal-form .form-field label {
  display: block;
  font-size: 13px;
  color: #475569;
  margin-bottom: 6px;
}
.whitepaper-modal-form .form-field .req { color: var(--color-accent, #FF6B35); }
.whitepaper-modal-form input,
.whitepaper-modal-form textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
  font-family: inherit;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.whitepaper-modal-form input:focus,
.whitepaper-modal-form textarea:focus {
  outline: none;
  border-color: var(--color-primary, #1E4B8F);
  box-shadow: 0 0 0 3px rgba(30, 75, 143, .12);
}
.whitepaper-modal-form textarea { resize: vertical; min-height: 70px; }

.whitepaper-modal-msg {
  margin: 12px 0;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.5;
}
.whitepaper-modal-msg.is-error   { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.whitepaper-modal-msg.is-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }

.whitepaper-modal-foot {
  margin: 12px 0 0;
  font-size: 12px;
  color: #94a3b8;
  text-align: center;
}

/* 提交中按钮态 */
.btn[disabled], .btn.is-loading { opacity: .65; pointer-events: none; }

/* 单方案页底部电话门卡片（替代旧版 .whitepaper-cta 硬链接） */
.solution-whitepaper-gate {
  margin: 40px 0 8px;
  padding: 28px 32px;
  background: linear-gradient(135deg, #f0f4f9 0%, #fff8f4 100%);
  border-left: 4px solid var(--color-accent, #FF6B35);
  border-radius: 10px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.solution-whitepaper-gate-icon {
  width: 56px;
  height: 56px;
  background: #fff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary, #1E4B8F);
  box-shadow: 0 4px 12px rgba(30, 75, 143, .08);
}
.solution-whitepaper-gate-body h3 {
  margin: 0 0 6px;
  color: var(--color-primary, #1E4B8F);
  font-size: 20px;
}
.solution-whitepaper-gate-body p {
  margin: 0;
  color: #475569;
  font-size: 14px;
  line-height: 1.65;
}
.solution-whitepaper-gate-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: stretch;
  min-width: 200px;
}
.solution-whitepaper-gate-actions .btn { white-space: nowrap; justify-content: center; }
@media (max-width: 768px) {
  .solution-whitepaper-gate {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 22px 20px;
  }
  .solution-whitepaper-gate-icon { margin: 0 auto; }
  .solution-whitepaper-gate-body p { font-size: 13px; }
  .solution-whitepaper-gate-actions { width: 100%; }
}

/* 旧版"下载完整白皮书"硬链接块兜底隐藏（防止个别历史正文里我们没匹配到的） */
.article-body .whitepaper-cta { display: none !important; }

/* 联系页 AJAX 留言表单的反馈条 */
.contact-form-msg {
  margin: 14px 0 4px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.55;
}
.contact-form-msg.is-error   { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.contact-form-msg.is-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.contact-form-foot {
  margin: 14px 0 0;
  font-size: 12px;
  color: #94a3b8;
  text-align: center;
  line-height: 1.6;
}

/* ==========================================================================
   气体检测因子全索引（page-gas-factors.php）
   ========================================================================== */
.gas-factors-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 18px;
}
.gas-factors-search {
  flex: 1 1 360px;
  position: relative;
  display: flex;
  align-items: center;
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0 12px;
  transition: border-color var(--transition-fast);
}
.gas-factors-search:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(30,75,143,.08); }
.gas-factors-search svg { width: 18px; height: 18px; color: var(--color-text-muted); flex: 0 0 18px; }
.gas-factors-search input {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 12px 8px;
  font-size: 15px;
  outline: none;
  color: var(--color-text);
}
.gas-factors-search button {
  background: var(--color-bg-alt);
  border: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  font-size: 16px; line-height: 1;
  color: var(--color-text-muted);
  cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
}
.gas-factors-search button:hover { background: var(--color-primary-lighter); color: var(--color-primary); }
.gas-factors-stats { display: flex; gap: 14px; align-items: center; font-size: 14px; color: var(--color-text-muted); }
.gas-factors-stats strong { color: var(--color-primary); font-size: 16px; }
.gas-factors-stats .badge-common { background: #fff3e6; color: #d2691e; padding: 4px 10px; border-radius: 12px; font-size: 13px; }

/* 气体因子库：搜索/A-Z 字母索引区与下方字母分块的间距收紧 */
.gas-factors-controls-section { padding: 32px 0 24px; }
.section.gas-factors-list { padding-top: 24px; }

.gas-factors-az {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.gas-factors-az a {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-primary);
  background: #fff;
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}
.gas-factors-az a:hover { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.gas-factors-az a.is-empty {
  color: var(--color-text-light);
  background: var(--color-bg-alt);
  pointer-events: none;
  opacity: 0.5;
}

.gas-factors-list .letter-block {
  margin: 32px 0;
  scroll-margin-top: 100px;
}
.gas-factors-list .letter-head {
  display: flex; align-items: baseline; gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: 16px;
}
.gas-factors-list .letter-mark {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: 1px;
}
.gas-factors-list .letter-count {
  font-size: 13px;
  color: var(--color-text-muted);
}

.factor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}
.factor-card {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 4px 10px;
  align-items: center;
  padding: 12px 14px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--color-text);
  transition: all var(--transition-fast);
}
.factor-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(30,75,143,.08);
  transform: translateY(-1px);
  color: var(--color-primary);
}
.factor-card.is-common {
  border-left: 3px solid #f59e0b;
  background: linear-gradient(to right, #fffbf5 0%, #fff 30%);
}
.factor-name {
  font-weight: 500;
  line-height: 1.4;
  word-break: break-word;
}
.factor-meta {
  display: inline-flex;
  gap: 4px;
  align-items: center;
  flex-shrink: 0;
}
.factor-type {
  font-size: 11px;
  padding: 2px 6px;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  border-radius: 4px;
  white-space: nowrap;
}
.factor-common-mark {
  font-size: 12px;
}
.factor-link {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 400;
}
.factor-card:hover .factor-link {
  color: var(--color-accent);
}

.gas-factors-empty {
  padding: 60px 20px;
  text-align: center;
  color: var(--color-text-muted);
}
.gas-factors-empty a { color: var(--color-primary); font-weight: 500; }

.gas-factors-footer-tip {
  margin-top: 32px;
  padding: 18px 22px;
  background: var(--color-primary-lighter);
  border-radius: var(--radius-lg);
  text-align: center;
  font-size: 14px;
  color: var(--color-text);
}
.gas-factors-footer-tip strong { color: var(--color-primary); }
.gas-factors-footer-tip a { color: var(--color-primary); font-weight: 500; }

@media (max-width: 767px) {
  .factor-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 8px; }
  .factor-card { padding: 10px 12px; font-size: 13px; }
  .gas-factors-az a { width: 32px; height: 32px; font-size: 13px; }
  .gas-factors-list .letter-mark { font-size: 28px; }
}

/* ==========================================================================
   单产品页交叉链接（相关因子 / 应用方案）
   ========================================================================== */
.product-cross-block .cross-head { margin-bottom: 24px; }
.product-cross-block .cross-head h2 {
  font-size: var(--fs-2xl);
  margin-bottom: 8px;
}
.product-cross-block .cross-sub {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}
.product-cross-block .cross-sub a { color: var(--color-primary); font-weight: 500; }

.cross-factor-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.cross-factor-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 14px;
  color: var(--color-text);
  transition: all var(--transition-fast);
}
.cross-factor-item:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  transform: translateY(-1px);
}
.cross-factor-item.is-common {
  border-left: 3px solid #f59e0b;
  background: linear-gradient(to right, #fffbf5, #fff);
}
.cross-factor-item.more {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  font-weight: 500;
}
.cross-factor-item.more:hover {
  background: var(--color-primary-dark, #163a73);
  color: #fff;
}

.cross-solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 991px) { .cross-solution-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 575px) { .cross-solution-grid { grid-template-columns: 1fr; } }

.cross-solution-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.cross-solution-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}
.cross-solution-card .solution-thumb {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.cross-solution-card .solution-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s;
}
.cross-solution-card:hover .solution-thumb img { transform: scale(1.06); }
.cross-solution-card .solution-thumb--brand { display: flex; align-items: center; justify-content: center; }
.cross-solution-card .solution-body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.cross-solution-card h4 { font-size: var(--fs-lg); margin-bottom: 8px; line-height: 1.45; }
.cross-solution-card p { color: var(--color-text-muted); font-size: var(--fs-sm); line-height: 1.65; flex: 1; }
.cross-solution-card .solution-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--color-primary);
  font-weight: 500;
  font-size: var(--fs-sm);
}

/* ==========================================================================
   404 页面（404.php）— 品牌一致版面
   ========================================================================== */
.nf-hero { padding: 80px 0; }
.nf-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: center;
}
@media (max-width: 991px) { .nf-grid { grid-template-columns: 1fr; gap: 32px; } }

.nf-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.nf-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--color-text);
}
@media (max-width: 575px) { .nf-title { font-size: 26px; } }
.nf-desc {
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 28px;
}

.nf-search {
  display: flex;
  align-items: center;
  background: #fff;
  border: 2px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 4px 4px 18px;
  margin-bottom: 24px;
  transition: border-color var(--transition-fast);
  max-width: 520px;
}
.nf-search:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(30,75,143,.08); }
.nf-search svg { width: 18px; height: 18px; color: var(--color-text-muted); flex-shrink: 0; }
.nf-search input {
  flex: 1;
  border: 0; outline: 0;
  padding: 10px 12px;
  font-size: 15px;
  background: transparent;
}
.nf-search button {
  padding: 10px 22px;
  background: var(--color-primary);
  color: #fff;
  border: 0;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.nf-search button:hover { background: var(--color-primary-dark, #163a73); }

.nf-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nf-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 280px;
}
.nf-bignum {
  font-size: 200px;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.08;
  letter-spacing: -8px;
  line-height: 1;
}
@media (max-width: 575px) { .nf-bignum { font-size: 140px; } }

.nf-bubbles { position: absolute; inset: 0; pointer-events: none; }
.nf-bubbles .b {
  position: absolute;
  background: #fff;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(30,75,143,.12);
  animation: nf-float 6s ease-in-out infinite;
}
.nf-bubbles .b1 { top: 10%;  left: 8%;   animation-delay: 0s; }
.nf-bubbles .b2 { top: 22%;  right: 10%; animation-delay: 1.2s; background: #fff5e6; border-color: var(--color-accent); color: var(--color-accent); }
.nf-bubbles .b3 { top: 60%;  left: 0%;   animation-delay: 2.4s; }
.nf-bubbles .b4 { top: 70%;  right: 12%; animation-delay: 3.6s; }
.nf-bubbles .b5 { top: 38%;  left: 38%;  animation-delay: 4.8s; }
@keyframes nf-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

.nf-cats .nf-cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 991px) { .nf-cats .nf-cat-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .nf-cats .nf-cat-grid { grid-template-columns: 1fr; } }

.nf-cat-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
  color: var(--color-text);
}
.nf-cat-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(30,75,143,.1);
  transform: translateY(-2px);
}
.nf-cat-card .nf-cat-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  background: var(--color-primary-lighter);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
}
.nf-cat-card h4 { flex: 1; font-size: 16px; margin: 0; }
.nf-cat-card .nf-cat-arrow {
  font-size: 20px;
  color: var(--color-primary);
  transition: transform 0.2s;
}
.nf-cat-card:hover .nf-cat-arrow { transform: translateX(4px); }

.nf-help { padding-bottom: 100px; }
.nf-help-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2c64aa 100%);
  color: #fff;
  padding: 36px 40px;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: 0 12px 32px rgba(30,75,143,.18);
}
.nf-help-card h3 { font-size: 22px; margin: 0 0 8px; color: #fff; }
.nf-help-card p { opacity: 0.85; margin: 0 0 22px; }
.nf-help-actions { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.nf-help-card .btn-outline { color: #fff; border-color: rgba(255,255,255,.4); }
.nf-help-card .btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.nf-help-card .btn-accent { background: var(--color-accent); }

/* ==========================================================================
   搜索结果页（search.php）
   ========================================================================== */
.search-controls { padding: 24px 0; background: var(--color-bg-alt); border-bottom: 1px solid var(--color-border); }
.search-redo {
  display: flex;
  align-items: center;
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  padding: 4px 4px 4px 16px;
  max-width: 760px;
  margin: 0 auto;
  gap: 8px;
}
.search-redo:focus-within { border-color: var(--color-primary); }
.search-redo svg { width: 18px; height: 18px; color: var(--color-text-muted); flex-shrink: 0; }
.search-redo input { flex: 1; border: 0; outline: 0; padding: 10px 8px; font-size: 15px; background: transparent; }
.search-redo select { border: 0; background: var(--color-bg-alt); padding: 8px 12px; border-radius: var(--radius); font-size: 14px; cursor: pointer; }
.search-redo button { padding: 10px 22px; background: var(--color-primary); color: #fff; border: 0; border-radius: var(--radius); font-weight: 500; cursor: pointer; }

.search-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 991px) { .search-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 575px) { .search-grid { grid-template-columns: 1fr; } }

/* 搜索结果中的关键词高亮 */
.search-card mark, .search-gas-card mark {
  background: linear-gradient(180deg, transparent 60%, #ffe7a3 60%);
  color: inherit;
  padding: 0 1px;
}

/* 气体因子直达匹配区块（搜索页顶部） */
.search-gas-block { padding: 28px 0 0; }
.search-gas-title {
  margin: 0 0 14px;
  color: var(--color-primary, #1E4B8F);
  font-size: 17px;
  font-weight: 600;
}
.search-gas-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 991px) { .search-gas-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 575px) { .search-gas-grid { grid-template-columns: 1fr; } }
.search-gas-card {
  display: block;
  padding: 14px 18px;
  background: linear-gradient(135deg, #f0f4f9 0%, #fff8f4 100%);
  border: 1px solid #e2e8f0;
  border-left: 3px solid var(--color-accent, #FF6B35);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: transform .2s, box-shadow .2s;
}
.search-gas-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(30, 75, 143, .12);
}
.search-gas-card-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}
.search-gas-card-head strong {
  color: var(--color-primary, #1E4B8F);
  font-size: 16px;
}
.search-gas-formula {
  font-family: ui-monospace, "Courier New", monospace;
  color: #475569;
  font-size: 14px;
}
.search-gas-card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  color: #64748b;
  font-size: 12px;
}
.search-gas-card-meta .search-gas-arrow {
  margin-left: auto;
  color: var(--color-accent, #FF6B35);
  font-weight: 600;
}

.search-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  color: var(--color-text);
}
.search-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}
.search-card-thumb {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.search-card-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.search-card:hover .search-card-thumb img { transform: scale(1.06); }
.search-card-type {
  position: absolute;
  top: 12px; left: 12px;
  padding: 4px 10px;
  background: rgba(30,75,143,.92);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  border-radius: 4px;
}
.search-card-body { padding: 18px 20px 22px; flex: 1; display: flex; flex-direction: column; }
.search-card h4 { font-size: var(--fs-lg); margin-bottom: 8px; }
.search-card p { color: var(--color-text-muted); font-size: var(--fs-sm); flex: 1; line-height: 1.65; }
.search-card-link { color: var(--color-primary); font-weight: 500; font-size: var(--fs-sm); margin-top: 12px; }

.search-empty {
  text-align: center;
  padding: 60px 20px;
  max-width: 600px;
  margin: 0 auto;
}
.search-empty-icon { font-size: 64px; margin-bottom: 16px; }
.search-empty h2 { font-size: 24px; margin-bottom: 16px; }
.search-empty h2 span { color: var(--color-primary); }
.search-empty p { color: var(--color-text-muted); margin-bottom: 12px; }
.search-tips { list-style: none; padding: 0; text-align: left; margin: 0 auto 28px; max-width: 480px; }
.search-tips li { padding: 8px 0 8px 28px; position: relative; color: var(--color-text); }
.search-tips li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}
.search-tips a { color: var(--color-primary); font-weight: 500; }

/* ==========================================================================
   产品列表顶部 · 左搜索 + 右因子 CTA（同高一行）
   ========================================================================== */
.product-search-row {
  display: flex;
  gap: 16px;
  align-items: stretch;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.product-search-bar {
  flex: 1 1 auto;
  min-width: 280px;
  display: flex;
  align-items: center;
  background: #fff;
  border: 1.5px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 4px 4px 18px;
  height: 48px;
  transition: border-color var(--transition-fast);
}
.product-search-bar:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,75,143,.08);
}
.product-search-bar svg {
  width: 18px; height: 18px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}
.product-search-bar input[type="search"] {
  flex: 1;
  border: 0; outline: 0;
  padding: 8px 12px;
  font-size: 14px;
  background: transparent;
  min-width: 0;
}
.product-search-bar-select {
  border: 0;
  background: var(--color-bg-alt);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--color-text);
  cursor: pointer;
  margin-right: 4px;
}
.product-search-bar button {
  flex-shrink: 0;
  padding: 0 22px;
  height: 38px;
  background: var(--color-primary);
  color: #fff;
  border: 0;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}
.product-search-bar button:hover {
  background: var(--color-primary-dark, #163a73);
}

.factor-cta-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 18px 0 14px;
  height: 48px;
  background: linear-gradient(135deg, #fff8e1 0%, #fff5d4 100%);
  border: 1.5px solid #ffd54f;
  border-radius: 999px;
  color: var(--color-text);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.factor-cta-pill:hover {
  border-color: var(--color-accent);
  background: linear-gradient(135deg, #fff3c4 0%, #ffe896 100%);
  box-shadow: 0 4px 12px rgba(255, 213, 79, 0.3);
  color: var(--color-text);
  transform: translateY(-1px);
}
.factor-cta-pill-icon {
  font-size: 18px;
  line-height: 1;
  flex-shrink: 0;
}
.factor-cta-pill-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  gap: 1px;
}
.factor-cta-pill-text strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}
.factor-cta-pill-text span {
  font-size: 11px;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.factor-cta-pill-arrow {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform 0.2s;
}
.factor-cta-pill:hover .factor-cta-pill-arrow {
  transform: translateX(3px);
  color: var(--color-accent);
}

.product-list-head {
  margin-bottom: 20px;
}
.product-list-count {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  margin: 0;
}
.product-list-count strong {
  color: var(--color-primary);
  font-weight: 600;
}

@media (max-width: 767px) {
  .product-search-row { gap: 10px; }
  .product-search-bar { min-width: 100%; }
  .factor-cta-pill { width: 100%; justify-content: center; }
  .factor-cta-pill-text strong { font-size: 13px; }
  .factor-cta-pill-text span { font-size: 11px; }
}

/* ==========================================================================
   gas-factors 搜索表单：搜产品按钮
   ========================================================================== */
.gas-factors-search-submit {
  background: var(--color-primary);
  color: #fff;
  border: 0;
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  margin-left: 4px;
  white-space: nowrap;
}
.gas-factors-search-submit:hover {
  background: var(--color-accent);
}

/* ==========================================================================
   搜索结果页 · 因子命中横幅（search-factor-hits）
   ========================================================================== */
.search-factor-hits {
  padding-top: 32px;
  padding-bottom: 0;
}
.factor-hits-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  flex-wrap: wrap;
  gap: 10px;
}
.factor-hits-head h3 {
  font-size: 18px;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.factor-hits-head h3 strong { color: var(--color-accent); }
.factor-hits-icon { font-size: 22px; }
.factor-hits-all {
  font-size: 13px;
  color: var(--color-primary);
  font-weight: 500;
}
.factor-hits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  padding: 16px;
  background: linear-gradient(135deg, #fff8e1 0%, #fffbf0 100%);
  border-radius: var(--radius-lg);
  border: 1px solid #ffe082;
}
.factor-hit-card {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 4px 8px;
  padding: 12px 14px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-text);
  transition: all var(--transition-fast);
}
.factor-hit-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(30,75,143,0.08);
  color: var(--color-primary);
}
.factor-hit-card.is-common {
  border-left: 3px solid #f59e0b;
}
.factor-hit-name {
  font-weight: 500;
  font-size: 14px;
}
.factor-hit-mark {
  font-size: 13px;
}
.factor-hit-link {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--color-primary);
  font-weight: 500;
}

/* ==========================================================================
   单气体因子轻量页（single-gas-factor.php）
   ========================================================================== */
.gas-factor-detail { padding: 40px 0; }
.gas-factor-detail .container-narrow { max-width: 920px; }

.gf-overview-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 36px;
  padding: 18px 24px;
  background: linear-gradient(135deg, #f0f6fc 0%, #fff 100%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.gf-meta-item {
  display: flex; flex-direction: column; gap: 4px;
}
.gf-meta-label {
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.5px;
}
.gf-meta-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}
.gf-meta-hazard.hazard-极高 .gf-meta-value { color: #dc2626; }
.gf-meta-hazard.hazard-高    .gf-meta-value { color: #ea580c; }
.gf-meta-hazard.hazard-中    .gf-meta-value { color: #ca8a04; }
.gf-meta-hazard.hazard-低    .gf-meta-value { color: #65a30d; }
.gf-meta-flammable .gf-meta-value { color: #ea580c; }
.gf-meta-idlh .gf-meta-value { color: #dc2626; }

.gf-section {
  margin-bottom: 32px;
}
.gf-section h2 {
  font-size: 22px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary-lighter);
}
.gf-section-icon {
  font-size: 22px;
}
.gf-section p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-text);
}

.gf-standards {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
.gf-standards th {
  width: 35%;
  padding: 12px 18px;
  background: var(--color-bg-alt);
  text-align: left;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.gf-standards td {
  padding: 12px 18px;
  color: var(--color-primary);
  font-weight: 600;
  font-family: 'Consolas', 'Monaco', monospace;
  border-bottom: 1px solid var(--color-border);
}
.gf-standards tr:last-child th,
.gf-standards tr:last-child td { border-bottom: 0; }

.gf-note {
  margin-top: 12px;
  padding: 12px 16px;
  background: #fff8e1;
  border-left: 3px solid #f59e0b;
  font-size: 13px;
  color: var(--color-text-muted);
  border-radius: 0 6px 6px 0;
}

.gf-list {
  list-style: none;
  padding: 0;
}
.gf-list li {
  padding: 10px 0 10px 28px;
  position: relative;
  border-bottom: 1px dashed var(--color-border);
  font-size: 15px;
}
.gf-list li:last-child { border-bottom: 0; }
.gf-list li::before {
  content: "▸";
  position: absolute;
  left: 8px;
  color: var(--color-primary);
  font-weight: 700;
}

.gf-cta-card {
  margin: 36px 0 24px;
  padding: 28px 32px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #2c64aa 100%);
  border-radius: var(--radius-lg);
  color: #fff;
  text-align: center;
  box-shadow: 0 12px 28px rgba(30,75,143,0.18);
}
.gf-cta-card h3 { font-size: 22px; margin: 0 0 8px; color: #fff; }
.gf-cta-card p { opacity: 0.9; margin: 0 0 20px; }
.gf-cta-card strong { color: #ffd54f; }
.gf-cta-actions { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.gf-cta-card .btn-outline { color: #fff; border-color: rgba(255,255,255,.5); }
.gf-cta-card .btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.gf-cta-card .btn-primary { background: var(--color-accent); border-color: var(--color-accent); }
.gf-cta-card .btn-primary:hover { background: #f57c00; }

.gf-back {
  text-align: center;
  margin-top: 20px;
}
.gf-back a {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 14px;
}

@media (max-width: 575px) {
  .gas-factor-detail { padding: 24px 0; }
  .gf-section h2 { font-size: 18px; }
  .gf-cta-card { padding: 22px 18px; }
  .gf-cta-card h3 { font-size: 18px; }
}

/* Tier 2 自动生成内容的提示条 */
.gf-auto-notice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  margin-bottom: 24px;
  background: #f0f6fc;
  border-left: 3px solid var(--color-primary);
  border-radius: 0 6px 6px 0;
  font-size: 13px;
  color: var(--color-text);
}
.gf-auto-notice strong {
  color: var(--color-primary);
  white-space: nowrap;
}
.gf-auto-notice span {
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   产品中心落地页（/products/）— 付费推广转化优化
   trust band + 6 大分类卡片网格 + 9 行业 pills
   ============================================================ */

/* Trust band — 紧贴 hero 下，4 列数据 */
.product-landing-band {
  background: linear-gradient(135deg, #f0f4f9 0%, #fff8f4 100%);
  border-bottom: 1px solid var(--color-border, #e2e8f0);
  padding: 22px 0;
}
.product-landing-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: center;
}
.product-landing-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.product-landing-stats .stat-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary, #1E4B8F);
  line-height: 1;
  letter-spacing: -0.5px;
}
.product-landing-stats .stat-num em {
  font-style: normal;
  font-size: 18px;
  color: var(--color-accent, #FF6B35);
  margin-left: 2px;
}
.product-landing-stats .stat-lbl {
  font-size: 13px;
  color: var(--color-text-muted, #64748b);
}

/* section head 通用 */
.product-industry-band .section-head {
  text-align: center;
  margin-bottom: 32px;
}
.product-industry-band .section-head h2 {
  font-size: 26px;
  color: var(--color-primary, #1E4B8F);
  margin: 0 0 8px;
}
.product-industry-band .section-head p {
  margin: 0;
  color: var(--color-text-muted, #64748b);
  font-size: 14px;
}

/* 16 大行业 pill（4 列网格，手机 2 列） */
.product-industry-band {
  background: #fafbfc;
}
.product-industry-pills {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.industry-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 18px 12px;
  background: #fff;
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 12px;
  text-decoration: none;
  color: inherit;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
  text-align: center;
}
.industry-pill:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent, #FF6B35);
  box-shadow: 0 8px 20px rgba(255, 107, 53, .12);
}
.industry-pill-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #f0f4f9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary, #1E4B8F);
  transition: background .25s ease, color .25s ease;
}
.industry-pill-icon svg { stroke-width: 1.8; }
.industry-pill:hover .industry-pill-icon {
  background: var(--color-accent, #FF6B35);
  color: #fff;
}
.industry-pill-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary, #1E4B8F);
}
.industry-pill-count {
  font-size: 11px;
  color: var(--color-text-muted, #94a3b8);
}

/* 响应式：平板 */
@media (max-width: 991px) {
  .product-industry-pills { grid-template-columns: repeat(3, 1fr); }
}
/* 响应式：手机 */
@media (max-width: 640px) {
  .product-landing-band { padding: 16px 0; }
  .product-landing-stats { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .product-landing-stats .stat-num { font-size: 22px; }
  .product-landing-stats .stat-num em { font-size: 14px; }
  .product-industry-band .section-head h2 { font-size: 20px; }
  .product-industry-pills { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .industry-pill { padding: 14px 8px; }
  .industry-pill-icon { width: 38px; height: 38px; }
  .industry-pill-icon svg { width: 20px; height: 20px; }
  .industry-pill-name { font-size: 13px; }
}

/* ============================================================
   气体浓度换算工具 / /converter/
   ============================================================ */

.converter-card {
  background: #fff;
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 4px 16px rgba(30, 75, 143, .04);
}

.converter-row { margin-bottom: 24px; }
.converter-label {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted, #64748b);
  margin-bottom: 8px;
  letter-spacing: 0.3px;
  font-weight: 500;
}

.converter-input-wrap { position: relative; }
.converter-input {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.converter-input:focus {
  outline: none;
  border-color: var(--color-primary, #1E4B8F);
  box-shadow: 0 0 0 3px rgba(30, 75, 143, .12);
}

.converter-meta {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.converter-tag {
  background: rgba(30, 75, 143, .08);
  color: var(--color-primary, #1E4B8F);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 500;
}
.converter-mw { font-size: 13px; color: var(--color-text, #1a2332); }
.converter-mw strong { color: var(--color-accent, #FF6B35); }
.converter-cas { font-size: 12px; color: var(--color-text-muted, #94a3b8); }

/* 气体下拉选择面板 */
.converter-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 380px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .12);
  z-index: 100;
}
.converter-dropdown-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
  cursor: pointer;
  transition: background .12s ease;
  border-bottom: 1px solid #f1f5f9;
}
.converter-dropdown-item:last-child { border-bottom: 0; }
.converter-dropdown-item:hover {
  background: rgba(30, 75, 143, .06);
}
.converter-dropdown-item strong {
  font-weight: 600;
  color: var(--color-text, #1a2332);
  font-size: 14px;
}
.converter-formula-small,
.converter-mw-small {
  font-size: 12px;
  color: var(--color-text-muted, #94a3b8);
}

/* 主换算区：左输入 + ⇄ + 右输出 */
.converter-grid {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: 16px;
  align-items: end;
  margin-bottom: 24px;
}
.converter-side { display: flex; flex-direction: column; }
.converter-arrow {
  font-size: 28px;
  color: var(--color-primary, #1E4B8F);
  text-align: center;
  user-select: none;
  padding-bottom: 12px;
  transition: transform .25s ease, color .25s ease;
}
.converter-arrow:hover {
  transform: rotate(180deg);
  color: var(--color-accent, #FF6B35);
}

.converter-value-row {
  display: grid;
  grid-template-columns: 1fr 130px;
  gap: 8px;
}
.converter-input-number { font-size: 18px; font-weight: 500; }
.converter-input-unit { font-size: 14px; }
.converter-input[readonly] {
  background: #f8fafc;
  color: var(--color-primary, #1E4B8F);
  font-weight: 600;
}

.converter-condition-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.converter-condition-row label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
  color: var(--color-text-muted, #64748b);
}

.converter-formula {
  background: linear-gradient(135deg, #f0f4f9 0%, #fff8f4 100%);
  border-left: 4px solid var(--color-accent, #FF6B35);
  padding: 14px 18px;
  border-radius: 6px;
  margin-bottom: 24px;
}
.converter-formula h4 {
  margin: 0 0 6px;
  color: var(--color-primary, #1E4B8F);
  font-size: 14px;
}
.converter-formula p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--color-text, #1a2332);
}
.converter-formula code {
  background: rgba(30, 75, 143, .08);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Consolas', 'Monaco', monospace;
  color: var(--color-primary, #1E4B8F);
}

.converter-tips {
  background: #fafbfc;
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  padding: 16px 20px;
  font-size: 13px;
  color: var(--color-text-muted, #64748b);
  line-height: 1.7;
}
.converter-tips strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-text, #1a2332);
  font-size: 14px;
}
.converter-tips ul { margin: 0; padding-left: 20px; }
.converter-tips li { margin-bottom: 4px; }
.converter-tips code {
  background: rgba(30, 75, 143, .06);
  padding: 1px 4px;
  border-radius: 3px;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 12px;
}

.converter-cta {
  margin-top: 32px;
  text-align: center;
  padding: 24px;
  background: linear-gradient(135deg, var(--color-primary, #1E4B8F) 0%, #143663 100%);
  border-radius: 12px;
  color: #fff;
}
.converter-cta p { margin: 0 0 16px; font-size: 16px; }
.converter-cta-actions { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.converter-cta .btn-outline {
  border-color: rgba(255,255,255,.4);
  color: #fff;
}

/* 移动端 */
@media (max-width: 640px) {
  .converter-card { padding: 20px 16px; }
  .converter-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .converter-arrow {
    transform: rotate(90deg);
    padding: 0;
  }
  .converter-arrow:hover { transform: rotate(270deg); }
  .converter-condition-row { grid-template-columns: 1fr; }
  .converter-value-row { grid-template-columns: 1fr 100px; }
}

/* /gas-factors/ 页统计区中的"浓度换算工具"小标签 */
.badge.badge-tool {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: linear-gradient(135deg, var(--color-primary, #1E4B8F), #143663);
  color: #fff !important;
  padding: 4px 12px;
  border-radius: 12px;
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  margin-left: 4px;
  transition: transform .2s ease;
}
.badge.badge-tool:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(30, 75, 143, .25);
}

/* /gas-factor/{slug}/ 详情页中段的 → 浓度换算工具链接 */
.gf-converter-link {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 16px 0 0;
  padding: 16px 20px;
  background: linear-gradient(135deg, #f0f4f9 0%, #fff8f4 100%);
  border-left: 4px solid var(--color-accent, #FF6B35);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: transform .2s ease, box-shadow .2s ease;
}
.gf-converter-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 107, 53, .12);
}
.gf-converter-icon { font-size: 28px; flex: 0 0 auto; }
.gf-converter-text { flex: 1; display: flex; flex-direction: column; gap: 2px; }
.gf-converter-text strong { color: var(--color-primary, #1E4B8F); font-size: 15px; }
.gf-converter-text span { font-size: 13px; color: var(--color-text-muted, #64748b); }
.gf-converter-arrow {
  flex: 0 0 auto;
  color: var(--color-accent, #FF6B35);
  font-size: 20px;
  font-weight: 600;
}

/* =========================================
   国标报警值计算器 / /alarm-calc/
   ========================================= */
.alarm-card {
  background: #fff;
  padding: 32px 36px;
  border-radius: 14px;
  box-shadow: 0 6px 24px rgba(30, 75, 143, .08);
  border: 1px solid #e2e8f0;
}
.alarm-row { margin-bottom: 24px; }
.alarm-label { display: block; margin-bottom: 8px; color: var(--color-primary, #1E4B8F); font-weight: 600; font-size: 14px; }
.alarm-input-wrap { position: relative; }
.alarm-input {
  width: 100%; padding: 12px 16px; font-size: 15px;
  background: #f8fafc; border: 1.5px solid #e2e8f0; border-radius: 8px;
  color: var(--color-text, #1a2332); transition: border-color .15s, background .15s;
}
.alarm-input:focus { outline: 0; border-color: var(--color-primary, #1E4B8F); background: #fff; }
.alarm-dropdown {
  position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 30;
  background: #fff; border: 1px solid #e2e8f0; border-radius: 8px;
  box-shadow: 0 8px 24px rgba(30, 75, 143, .12);
  max-height: 360px; overflow-y: auto;
}
.alarm-dropdown-item {
  display: grid; grid-template-columns: 1fr 1fr 2fr; gap: 12px;
  padding: 10px 14px; font-size: 13px; cursor: pointer; border-bottom: 1px solid #f1f5f9;
}
.alarm-dropdown-item:last-child { border-bottom: 0; }
.alarm-dropdown-item:hover { background: #f0f4f9; }
.alarm-dropdown-item strong { color: var(--color-primary, #1E4B8F); font-size: 14px; }
.alarm-dropdown-hint { color: #94a3b8; font-size: 12px; }

.alarm-empty {
  text-align: center; padding: 50px 30px; color: #64748b;
  background: #f8fafc; border-radius: 10px; border: 1px dashed #cbd5e1;
}
.alarm-empty-icon { font-size: 42px; margin-bottom: 12px; }
.alarm-empty p { margin: 0; line-height: 1.7; }

/* 选中气体头部 */
.alarm-gas-head {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 18px 22px; margin-bottom: 24px;
  background: linear-gradient(135deg, #f0f4f9 0%, #fff8f4 100%);
  border-left: 4px solid var(--color-accent, #FF6B35);
  border-radius: 10px;
}
.alarm-gas-head h3 { margin: 0 0 6px; color: var(--color-primary, #1E4B8F); font-size: 22px; }
.alarm-gas-meta { display: flex; flex-wrap: wrap; gap: 14px; color: #475569; font-size: 13px; }
.alarm-hazard-badge {
  padding: 6px 12px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: #f1f5f9; color: #475569; white-space: nowrap;
}
.alarm-hazard-badge.hazard-高 { background: #fee2e2; color: #b91c1c; }
.alarm-hazard-badge.hazard-中 { background: #fef3c7; color: #92400e; }
.alarm-hazard-badge.hazard-低 { background: #dcfce7; color: #166534; }

.alarm-section { margin-bottom: 28px; }
.alarm-section h4 {
  margin: 0 0 12px; padding-bottom: 8px; font-size: 16px;
  color: var(--color-primary, #1E4B8F); border-bottom: 2px solid #e2e8f0;
}

/* 限值表 */
.alarm-limits { width: 100%; border-collapse: collapse; }
.alarm-limits th, .alarm-limits td { padding: 9px 14px; text-align: left; border-bottom: 1px solid #f1f5f9; font-size: 14px; }
.alarm-limits th { width: 220px; color: #64748b; font-weight: 500; }
.alarm-limits td:nth-child(2) { color: var(--color-text, #1a2332); font-weight: 600; }
.alarm-limits-note { color: #94a3b8 !important; font-size: 12px !important; font-weight: 400 !important; }

/* 场景切换 */
.alarm-scene-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.alarm-scene-tab {
  padding: 9px 18px; background: #f1f5f9; color: #475569; border: 0; border-radius: 8px;
  font-size: 14px; cursor: pointer; transition: all .15s;
}
.alarm-scene-tab:hover { background: #e2e8f0; }
.alarm-scene-tab.active { background: var(--color-primary, #1E4B8F); color: #fff; }
.alarm-scene-panel { display: none; }
.alarm-scene-panel.active { display: block; }

.alarm-formula-box {
  padding: 14px 18px; margin-bottom: 16px;
  background: #f0f4f9; border-radius: 8px; border-left: 3px solid var(--color-primary, #1E4B8F);
}
.alarm-formula-box strong { display: block; color: var(--color-primary, #1E4B8F); margin-bottom: 6px; font-size: 14px; }
.alarm-formula-box ul { margin: 0; padding-left: 20px; color: #475569; font-size: 14px; line-height: 1.85; }
.alarm-formula-box .coef { color: var(--color-accent, #FF6B35); font-weight: 600; }
.alarm-formula-cite { margin: 8px 0 0; font-size: 11px; color: #94a3b8; font-style: italic; }

.alarm-coef-row { display: flex; flex-wrap: wrap; gap: 18px; padding: 12px 18px; margin-bottom: 14px; background: #fff8f4; border-radius: 6px; font-size: 13px; }
.alarm-coef-row label { display: flex; align-items: center; gap: 8px; color: #475569; }
.alarm-coef-row input[type="range"] { width: 140px; }

/* 结果表 */
.alarm-result-table { width: 100%; border-collapse: collapse; margin-top: 10px; }
.alarm-result-table th { padding: 9px 14px; background: #f8fafc; color: #64748b; text-align: left; font-weight: 500; font-size: 13px; border-bottom: 2px solid #e2e8f0; }
.alarm-result-table td { padding: 11px 14px; border-bottom: 1px solid #f1f5f9; font-size: 14px; }
.alarm-result-table tr:last-child td { border-bottom: 0; }
.alarm-result-table td:first-child { width: 180px; white-space: nowrap; }
.alarm-result-table td:nth-child(2) { color: var(--color-accent, #FF6B35); font-size: 16px; }

.alarm-export { display: flex; gap: 12px; margin: 20px 0; flex-wrap: wrap; }
.alarm-export .btn { font-size: 13px; padding: 9px 16px; }

.alarm-cta {
  margin: 24px 0 0; padding: 18px 24px;
  background: linear-gradient(135deg, var(--color-primary, #1E4B8F) 0%, #2a5fa3 100%);
  color: #fff; border-radius: 10px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.alarm-cta p { margin: 0; flex: 1 1 auto; min-width: 240px; opacity: .95; }
.alarm-cta .btn { background: #fff; color: var(--color-primary, #1E4B8F); border-color: #fff; }
.alarm-cta .btn:hover { background: var(--color-accent, #FF6B35); color: #fff; border-color: var(--color-accent, #FF6B35); }

.alarm-tips {
  margin-top: 28px; padding: 16px 20px;
  background: #fff8f4; border-left: 3px solid var(--color-accent, #FF6B35); border-radius: 6px; font-size: 13px;
}
.alarm-tips strong { display: block; color: var(--color-accent, #FF6B35); margin-bottom: 6px; }
.alarm-tips ul { margin: 0; padding-left: 20px; color: #475569; line-height: 1.85; }

@media (max-width: 768px) {
  .alarm-card { padding: 22px 18px; }
  .alarm-gas-head { flex-direction: column; gap: 10px; }
  .alarm-limits th { width: auto; min-width: 130px; }
  .alarm-result-table td:first-child { width: auto; }
  .alarm-coef-row input[type="range"] { width: 100px; }
  .alarm-cta { flex-direction: column; align-items: stretch; text-align: center; }
}

@media print {
  .site-header, .site-footer, .floating-contact, .back-to-top, .mobile-bottom-bar,
  .alarm-input-wrap, .alarm-export, .alarm-cta, .alarm-tips, .alarm-scene-tabs {
    display: none !important;
  }
  .alarm-card { box-shadow: none; border: 1px solid #ccc; }
  .alarm-scene-panel { display: block !important; page-break-inside: avoid; margin-bottom: 18px; }
}

/* =========================================
   检测点布置计算器 / /point-calc/
   ========================================= */
.point-card {
  background: #fff; padding: 32px 36px; border-radius: 14px;
  box-shadow: 0 6px 24px rgba(30, 75, 143, .08); border: 1px solid #e2e8f0;
}
.point-input-grid { display: flex; flex-direction: column; gap: 18px; margin-bottom: 28px; padding-bottom: 24px; border-bottom: 1px dashed #e2e8f0; }
.point-field { display: flex; flex-direction: column; }
.point-field-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.point-label { display: block; margin-bottom: 8px; color: var(--color-primary, #1E4B8F); font-weight: 600; font-size: 13px; }
.point-input {
  width: 100%; height: 44px; padding: 0 14px; font-size: 14px; box-sizing: border-box;
  background: #f8fafc; border: 1.5px solid #e2e8f0; border-radius: 8px;
  color: var(--color-text, #1a2332); transition: border-color .15s, background .15s;
  -webkit-appearance: none; -moz-appearance: none; appearance: none;
  font-family: inherit; line-height: 1.4;
}
.point-input:focus { outline: 0; border-color: var(--color-primary, #1E4B8F); background: #fff; }
/* macOS 上 <select> 默认高度比 input 矮，手动归一化 + 自定义下拉箭头 */
select.point-input {
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='none' stroke='%2364748b' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round' d='M1 1.5l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}
.point-input-wrap { position: relative; }
.point-dropdown {
  position: absolute; left: 0; right: 0; top: calc(100% + 4px); z-index: 30;
  background: #fff; border: 1px solid #e2e8f0; border-radius: 8px;
  box-shadow: 0 8px 24px rgba(30, 75, 143, .12); max-height: 360px; overflow-y: auto;
}
.point-dropdown-item {
  display: grid; grid-template-columns: 1fr 1fr 2fr; gap: 12px;
  padding: 10px 14px; font-size: 13px; cursor: pointer; border-bottom: 1px solid #f1f5f9;
}
.point-dropdown-item:last-child { border-bottom: 0; }
.point-dropdown-item:hover { background: #f0f4f9; }
.point-dropdown-item strong { color: var(--color-primary, #1E4B8F); font-size: 14px; }
.point-dropdown-hint { color: #94a3b8; font-size: 12px; }
.point-density-hint {
  margin-top: 8px; padding: 8px 12px; font-size: 13px; background: #f0f4f9; border-radius: 6px; color: #475569;
}

/* 结果区 */
.point-result-summary { text-align: center; margin-bottom: 24px; padding: 24px; background: linear-gradient(135deg, #1E4B8F 0%, #2a5fa3 100%); border-radius: 12px; color: #fff; }
.point-result-num { font-size: 64px; font-weight: 700; line-height: 1; }
.point-result-num-label { font-size: 16px; opacity: .9; margin-top: 6px; }
.point-result-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 28px; }
.point-result-card { padding: 14px 16px; background: #f8fafc; border-radius: 8px; border-left: 3px solid var(--color-accent, #FF6B35); }
.point-result-card-label { font-size: 13px; color: #64748b; margin-bottom: 6px; }
.point-result-card-value { font-size: 18px; font-weight: 600; color: var(--color-primary, #1E4B8F); margin-bottom: 4px; }
.point-result-card-note { font-size: 11px; color: #94a3b8; }

.point-svg-wrap { margin-bottom: 24px; }
.point-svg-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; flex-wrap: wrap; gap: 8px; }
.point-svg-head h4 { color: var(--color-primary, #1E4B8F); font-size: 15px; margin: 0; }
.point-toggle { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: #475569; cursor: pointer; user-select: none; padding: 4px 10px; background: #f1f5f9; border-radius: 6px; }
.point-toggle:hover { background: #e2e8f0; }
.point-toggle input { margin: 0; cursor: pointer; }
.point-svg { display: block; padding: 12px; background: #fff; border: 1px solid #e2e8f0; border-radius: 8px; min-height: 200px; }
.point-svg svg { display: block; margin: 0 auto; width: 100%; max-width: 800px; height: auto; }
.point-svg:empty::before { content: '布点示意图加载中…'; color: #94a3b8; font-size: 13px; line-height: 200px; }
.point-svg-note { margin: 8px 0 0; color: #94a3b8; font-size: 12px; text-align: center; }

.point-section { margin-bottom: 18px; }
.point-section h4 { color: var(--color-primary, #1E4B8F); font-size: 15px; margin: 0 0 10px; }
.point-compare-table { width: 100%; border-collapse: collapse; font-size: 13px; background: #fff; border: 1px solid #e2e8f0; border-radius: 8px; overflow: hidden; }
.point-compare-table th { padding: 10px 12px; background: #f0f4f9; color: #475569; font-weight: 500; text-align: left; border-bottom: 1px solid #e2e8f0; }
.point-compare-table td { padding: 10px 12px; border-bottom: 1px solid #f1f5f9; color: #475569; }
.point-compare-table tr:last-child td { border-bottom: 0; }
.point-compare-table tr.is-current { background: #fff8f4; }
.point-compare-table tr.is-current td:first-child { color: var(--color-accent, #FF6B35); font-weight: 600; }
.point-compare-table tr.is-current strong { color: var(--color-accent, #FF6B35); }
.point-compare-note { margin: 8px 0 0; color: #94a3b8; font-size: 12px; }

.point-formula-box { padding: 14px 18px; margin-bottom: 18px; background: #f0f4f9; border-radius: 8px; border-left: 3px solid var(--color-primary, #1E4B8F); }
.point-formula-box strong { display: block; color: var(--color-primary, #1E4B8F); margin-bottom: 6px; font-size: 14px; }
.point-formula-box ul { margin: 0; padding-left: 20px; color: #475569; font-size: 13px; line-height: 1.85; }

.point-tips { padding: 14px 18px; margin-bottom: 18px; background: #fff8f4; border-left: 3px solid var(--color-accent, #FF6B35); border-radius: 6px; font-size: 13px; }
.point-tips strong { display: block; color: var(--color-accent, #FF6B35); margin-bottom: 6px; }
.point-tips ul { margin: 0; padding-left: 20px; color: #475569; line-height: 1.85; }

.point-export { display: flex; gap: 12px; margin: 18px 0; flex-wrap: wrap; }
.point-export .btn { font-size: 13px; padding: 9px 16px; }

.point-cta {
  margin: 20px 0 0; padding: 18px 24px;
  background: linear-gradient(135deg, var(--color-primary, #1E4B8F) 0%, #2a5fa3 100%);
  color: #fff; border-radius: 10px;
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
}
.point-cta p { margin: 0; flex: 1 1 auto; min-width: 240px; opacity: .95; }
.point-cta .btn { background: #fff; color: var(--color-primary, #1E4B8F); border-color: #fff; }
.point-cta .btn:hover { background: var(--color-accent, #FF6B35); color: #fff; border-color: var(--color-accent, #FF6B35); }

@media (max-width: 768px) {
  .point-card { padding: 22px 18px; }
  .point-field-row { grid-template-columns: 1fr 1fr; }
  .point-result-cards { grid-template-columns: 1fr; }
  .point-result-num { font-size: 48px; }
  .point-cta { flex-direction: column; align-items: stretch; text-align: center; }
}

@media print {
  .site-header, .site-footer, .floating-contact, .back-to-top, .mobile-bottom-bar,
  .point-input-grid, .point-export, .point-cta { display: none !important; }
  .point-card { box-shadow: none; border: 1px solid #ccc; }
}

/* =========================================
   白皮书在线预览 / /whitepaper-viewer/
   ========================================= */
.wpv-section { padding: 0 0 60px; background: #f1f5f9; }
.wpv-toolbar {
  position: sticky; top: 0; z-index: 50;
  background: #fff;
  border-bottom: 1px solid #e2e8f0;
  box-shadow: 0 2px 8px rgba(30, 75, 143, .04);
  padding: 14px 0;
  margin-bottom: 28px;
}
.wpv-toolbar-row {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
}
.wpv-back {
  color: var(--color-text-muted, #64748b); text-decoration: none; font-size: 14px; flex: 0 0 auto;
}
.wpv-back:hover { color: var(--color-primary, #1E4B8F); }
.wpv-title {
  margin: 0; flex: 1 1 auto; min-width: 0;
  font-size: 16px; color: var(--color-primary, #1E4B8F); font-weight: 600;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.wpv-meta { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.wpv-page-info { color: #64748b; font-size: 13px; }

.wpv-loading {
  text-align: center; padding: 80px 20px; color: #64748b;
}
.wpv-spinner {
  width: 40px; height: 40px;
  border: 3px solid #e2e8f0;
  border-top-color: var(--color-accent, #FF6B35);
  border-radius: 50%;
  margin: 0 auto 16px;
  animation: wpvSpin .8s linear infinite;
}
@keyframes wpvSpin { to { transform: rotate(360deg); } }
.wpv-loading p { margin: 0; line-height: 1.7; }
.wpv-loading-hint { color: #94a3b8; font-size: 12px; }

.wpv-error {
  text-align: center; padding: 60px 20px; color: #dc2626;
}

.wpv-pages {
  display: flex; flex-direction: column; align-items: center; gap: 18px;
  padding: 0 12px;
}
.wpv-page {
  position: relative; max-width: 100%;
  background: #fff; border-radius: 4px;
  box-shadow: 0 4px 16px rgba(30, 75, 143, .12);
  overflow: hidden;
}
.wpv-canvas {
  display: block; max-width: 100%; height: auto;
}
.wpv-page-label {
  position: absolute; bottom: 6px; right: 8px;
  font-size: 11px; color: #94a3b8;
  background: rgba(255, 255, 255, .85);
  padding: 2px 8px; border-radius: 3px;
  pointer-events: none;
}

@media (max-width: 640px) {
  .wpv-title { font-size: 14px; }
  .wpv-page-info { display: none; }  /* 手机端节省空间 */
  .wpv-pages { padding: 0; gap: 10px; }
  .wpv-page { border-radius: 0; }
}