/*
  伊宝尔科技蓝白主题 CSS
  基于 TemplateMo 574 Mexant 重构
  蓝白配色 / 规范排版 / 科技光效
*/

/* ==========================================
   CSS 变量系统 — 蓝白科技
   ========================================== */
:root {
  /* 主色调 */
  --yb-primary:      #2563eb;
  --yb-primary-light:#3b82f6;
  --yb-primary-dark: #1e40af;
  --yb-accent:       #00d4ff;

  /* 背景色阶 */
  --yb-bg:           #ffffff;
  --yb-bg-soft:      #f8fafc;
  --yb-bg-muted:     #f1f5f9;
  --yb-bg-card:      #ffffff;
  --yb-bg-glass:     rgba(255,255,255,0.72);

  /* 文字色阶 */
  --yb-text:         #0f172a;
  --yb-text-secondary:#475569;
  --yb-text-muted:   #94a3b8;

  /* 边框 */
  --yb-border:       #e2e8f0;
  --yb-border-light: #f1f5f9;
  --yb-border-blue:  rgba(37,99,235,0.25);

  /* 渐变 */
  --yb-grad-blue:    linear-gradient(135deg,#2563eb 0%,#3b82f6 100%);
  --yb-grad-hero:    linear-gradient(135deg,#1e3a8a 0%,#2563eb 60%,#3b82f6 100%);
  --yb-grad-soft:    linear-gradient(180deg,#f8fafc 0%,#ffffff 100%);

  /* 阴影 */
  --yb-shadow-xs:    0 1px 2px rgba(15,23,42,0.04);
  --yb-shadow-sm:    0 1px 3px rgba(15,23,42,0.06),0 1px 2px rgba(15,23,42,0.04);
  --yb-shadow-md:    0 4px 12px rgba(15,23,42,0.08),0 2px 4px rgba(15,23,42,0.04);
  --yb-shadow-lg:    0 12px 32px rgba(15,23,42,0.10),0 4px 8px rgba(15,23,42,0.04);
  --yb-shadow-blue:  0 4px 20px rgba(37,99,235,0.18);
  --yb-shadow-glow:  0 0 24px rgba(37,99,235,0.12);

  /* 圆角 */
  --yb-r-sm:  8px;
  --yb-r-md:  12px;
  --yb-r-lg:  16px;
  --yb-r-xl:  24px;
  --yb-r-full:999px;
}

/* ==========================================
   全局重置 — 蓝白基底
   ========================================== */
html, body {
  background-color: var(--yb-bg) !important;
  color: var(--yb-text) !important;
  font-family: 'Poppins',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  -webkit-font-smoothing: antialiased;
}

::selection   { background: var(--yb-primary); color: #fff; }
::-moz-selection { background: var(--yb-primary); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar      { width: 6px; }
::-webkit-scrollbar-track{ background: var(--yb-bg-soft); }
::-webkit-scrollbar-thumb{ background: var(--yb-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--yb-primary-light); }

/* ==========================================
   排版规范
   ========================================== */
h1,h2,h3,h4,h5,h6 { color: var(--yb-text) !important; margin-top: 0; margin-bottom: 0; }
p  { color: var(--yb-text-secondary) !important; font-size: 15px; line-height: 1.75; }
a  { color: var(--yb-primary); text-decoration: none !important; transition: color .2s; }
a:hover { color: var(--yb-primary-dark); }

/* 章节标题统一 */
.section-heading { text-align: center; margin-bottom: 56px; }
.section-heading h6 {
  font-size: 13px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--yb-primary) !important;
  margin-bottom: 10px;
}
.section-heading h4 {
  font-size: 32px; font-weight: 700; line-height: 1.3;
  color: var(--yb-text) !important;
}
.section-heading p {
  margin-top: 16px; max-width: 600px; margin-left: auto; margin-right: auto;
}

/* ==========================================
   按钮 — 蓝白科技
   ========================================== */
.green-button a,
.orange-button a,
#contact button.orange-button,
.cta-button,
.dehumidifier-focus-btn,
.product-showcase-btn {
  display: inline-block; padding: 12px 28px; font-size: 14px;
  font-weight: 600; letter-spacing: .3px; border-radius: var(--yb-r-md) !important;
  transition: all .25s ease; position: relative; overflow: hidden;
}

/* 主按钮 — 蓝渐变 */
.green-button a,
.orange-button a,
#contact button.orange-button,
.cta-button,
.dehumidifier-focus-btn {
  background: var(--yb-grad-blue) !important;
  color: #fff !important;
  border: none !important;
  box-shadow: var(--yb-shadow-blue) !important;
}
.green-button a:hover,
.orange-button a:hover,
#contact button.orange-button:hover,
.cta-button:hover,
.dehumidifier-focus-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37,99,235,0.30) !important;
}

/* 次按钮 — 白底蓝边 */
.product-showcase-btn {
  background: #fff !important; color: var(--yb-primary) !important;
  border: 1.5px solid var(--yb-border-blue) !important;
  box-shadow: var(--yb-shadow-sm) !important;
  width: auto !important; min-width: 144px !important; white-space: nowrap !important;
}
.product-showcase-btn:hover {
  border-color: var(--yb-primary) !important;
  box-shadow: var(--yb-shadow-blue) !important;
  color: var(--yb-primary-dark) !important;
}

/* ==========================================
   导航栏 — 现代精致
   ========================================== */
.header-area {
  background: rgba(255,255,255,0.92) !important;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(226,232,240,0.6) !important;
  box-shadow: 0 1px 2px rgba(15,23,42,0.03) !important;
}
.background-header {
  background: rgba(255,255,255,0.98) !important;
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border-bottom: 1px solid rgba(226,232,240,0.8) !important;
  box-shadow: 0 4px 20px rgba(15,23,42,0.06) !important;
}

/* Logo */
.header-area .main-nav .logo { color: var(--yb-text) !important; }
.logo-text {
  color: var(--yb-primary) !important; font-weight: 800;
  letter-spacing: 2px; font-size: 26px;
}

/* 导航容器 */
.header-area .main-nav .nav {
  gap: 16px;
}

/* 导航链接 */
.header-area .main-nav .nav li {
  padding-left: 4px !important;
  padding-right: 4px !important;
}

.header-area .main-nav .nav li a {
  color: var(--yb-text-secondary) !important;
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 0.3px;
  position: relative;
  padding: 10px 16px !important;
  border-radius: 8px !important;
  transition: all 0.2s ease;
}

/* 悬停背景 */
.header-area .main-nav .nav li:hover a {
  color: var(--yb-primary) !important;
  background: rgba(37,99,235,0.06) !important;
}

/* Active 状态 */
.header-area .main-nav .nav li a.active {
  color: var(--yb-primary) !important;
  background: rgba(37,99,235,0.08) !important;
  font-weight: 600 !important;
}

/* 联系按钮 */
.header-area .main-nav .nav li:last-child a {
  background: var(--yb-grad-blue) !important;
  color: #fff !important;
  padding: 11px 24px 11px 20px !important;
  border-radius: 100px !important;
  font-weight: 600 !important;
  font-size: 15px !important;
  box-shadow: 0 2px 12px rgba(37,99,235,0.25) !important;
  border: none !important;
  display: inline-flex !important;
  align-items: center !important;
  gap: 8px !important;
  letter-spacing: 0.3px !important;
}

.header-area .main-nav .nav li:last-child a::before {
  content: '\f095';
  font-family: 'FontAwesome';
  font-size: 14px;
  font-weight: 400;
}

.header-area .main-nav .nav li:last-child a:hover {
  background: var(--yb-primary-dark) !important;
  color: #fff !important;
  box-shadow: 0 4px 20px rgba(37,99,235,0.35) !important;
  transform: translateY(-1px);
}

/* 下拉箭头 */
.header-area .main-nav .nav li.has-sub {
  padding-right: 22px !important;
}
.header-area .main-nav .nav li.has-sub:after {
  color: var(--yb-text-muted) !important;
  font-size: 12px;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.2s ease;
}
.header-area .main-nav .nav li.has-sub:hover:after {
  transform: translateY(-50%) rotate(180deg);
}

.header-area .main-nav .nav li.has-sub ul.sub-menu {
  background: #fff !important;
  border: none !important;
  border-radius: var(--yb-r-sm) !important;
  box-shadow: 0 16px 48px rgba(15,23,42,0.14), 0 2px 8px rgba(15,23,42,0.06) !important;
  padding: 8px !important;
  min-width: 220px;
  margin-top: 10px;
  overflow: hidden;
}

/* 统一所有菜单项 */
.header-area .main-nav .nav li.has-sub ul.sub-menu li,
.header-area .main-nav .nav li.has-sub ul.sub-menu li:last-child {
  position: relative;
  overflow: hidden;
  margin: 0 !important;
  padding: 0 !important;
}

.header-area .main-nav .nav li.has-sub ul.sub-menu li a,
.header-area .main-nav .nav li.has-sub ul.sub-menu li:last-child a,
.background-header .main-nav .nav li.has-sub ul.sub-menu li:last-child a {
  background: transparent !important;
  color: var(--yb-text) !important;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 16px !important;
  border-bottom: none !important;
  border-radius: 8px !important;
  height: auto !important;
  line-height: 1.5 !important;
  margin: 0 !important;
  transition: all 0.15s ease;
  display: block;
}

/* 悬停效果 */
.header-area .main-nav .nav li.has-sub ul li a:hover,
.header-area .main-nav .nav li.has-sub ul.sub-menu li:last-child a:hover,
.background-header .main-nav .nav li.has-sub ul.sub-menu li:last-child a:hover {
  background: var(--yb-bg-soft) !important;
  color: var(--yb-primary) !important;
  padding-left: 16px !important;
  padding-right: 16px !important;
}

/* 强制覆盖原CSS中最后一项的特殊样式 — 用 body 前缀增加特异性 */
body .header-area .main-nav .nav li.has-sub ul.sub-menu li:last-child a,
body .background-header .main-nav .nav li.has-sub ul.sub-menu li:last-child a,
body .header-area .main-nav .nav li.has-sub ul.sub-menu li:last-child a:hover,
body .background-header .main-nav .nav li.has-sub ul.sub-menu li:last-child a:hover {
  margin-left: 0 !important;
  margin-right: 0 !important;
  padding: 12px 16px !important;
  border-radius: 8px !important;
  height: auto !important;
  line-height: 1.5 !important;
  background: transparent !important;
  color: var(--yb-text) !important;
  border-bottom: none !important;
  border-top: none !important;
  border-left: none !important;
  border-right: none !important;
}

body .header-area .main-nav .nav li.has-sub ul.sub-menu li:last-child a:hover,
body .background-header .main-nav .nav li.has-sub ul.sub-menu li:last-child a:hover {
  background: var(--yb-bg-soft) !important;
  color: var(--yb-primary) !important;
}

/* 汉堡菜单 */
.header-area .main-nav .menu-trigger span,
.header-area .main-nav .menu-trigger span:before,
.header-area .main-nav .menu-trigger span:after { background-color: var(--yb-text) !important; }

/* ==========================================
   页面标题区 — 蓝渐变
   ========================================== */
.page-heading {
  background: var(--yb-grad-hero) !important;
  padding: 180px 0 90px; text-align: center; position: relative; overflow: hidden;
}
.page-heading::before {
  content: ''; position: absolute; inset: 0;
  background:
    linear-gradient(90deg,transparent 49%,rgba(255,255,255,0.04) 50%,transparent 51%),
    linear-gradient(0deg,transparent 49%,rgba(255,255,255,0.04) 50%,transparent 51%);
  background-size: 60px 60px; pointer-events: none;
}
.page-heading h2 {
  font-size: 44px; color: #fff !important; font-weight: 700;
  letter-spacing: 4px; position: relative; z-index: 1;
}
.page-heading .div-dec {
  width: 48px; height: 3px; border-radius: 2px;
  background: rgba(255,255,255,0.9) !important; margin: 18px auto 20px;
  position: relative; z-index: 1;
}
.page-heading p {
  color: rgba(255,255,255,0.85) !important; font-size: 15px;
  max-width: 560px; margin: 0 auto; position: relative; z-index: 1;
}

/* ==========================================
   Swiper Banner — 蓝白
   ========================================== */
.swiper-container { background-color: var(--yb-bg-soft) !important; }

.slide-inner::before {
  content: ''; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(90deg,transparent 49%,rgba(37,99,235,0.03) 50%,transparent 51%),
    linear-gradient(0deg,transparent 49%,rgba(37,99,235,0.03) 50%,transparent 51%);
  background-size: 60px 60px;
}

.slide-inner .header-text { z-index: 2; }
.slide-inner .header-text h2 {
  color: #fff !important; text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.slide-inner .header-text h2 em { color: var(--yb-accent) !important; }
.slide-inner .header-text .div-dec {
  background: var(--yb-accent) !important;
  box-shadow: 0 0 12px rgba(0,212,255,0.5);
}
.slide-inner .header-text p { color: rgba(255,255,255,0.88) !important; }

.swiper-button-next, .swiper-button-prev { color: #fff !important; }

/* ==========================================
   卡片系统 — 白底蓝影
   ========================================== */
.services .service-item,
.product-card,
.contact-info-card,
.about-intro-panel,
.about-metric,
.timeline-content,
.what-we-do .right-items .item,
.stat-card,
.group-header,
.product-sidebar,
.product-details-tabs,
.product-info-panel,
.doc-item,
.home-about-point,
.contact-cta-card,
.pd-section,
.dehumidifier-focus-wrap,
.product-showcase-wrap,
.app-card,
.project-card,
.dehumidifier-compare-panel {
  background: var(--yb-bg-card) !important;
  border: 1px solid var(--yb-border) !important;
  border-radius: var(--yb-r-lg) !important;
  box-shadow: var(--yb-shadow-sm) !important;
  transition: all .25s ease;
}

/* 卡片悬停 */
.services .service-item:hover,
.product-card:hover,
.contact-info-card:hover,
.about-metric:hover,
.what-we-do .right-items .item:hover,
.stat-card:hover,
.doc-item:hover,
.contact-cta-card:hover,
.app-card:hover,
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--yb-shadow-blue) !important;
  border-color: var(--yb-border-blue) !important;
}

/* 卡片文字 */
.services .service-item h4,
.product-card .product-title,
.contact-info-card h4,
.about-intro-panel h3,
.timeline-content h4,
.what-we-do .right-items .item h4,
.group-header h3,
.product-info h2,
.pd-section-head h3,
.dehumidifier-focus-copy h2,
.product-showcase-title {
  color: var(--yb-text) !important;
}

.services .service-item p,
.product-card .product-desc,
.contact-info-card p,
.about-intro-panel p,
.timeline-content p,
.what-we-do .right-items .item p,
.footer-desc,
.product-showcase-desc {
  color: var(--yb-text-secondary) !important;
}

/* 图标 */
.services .service-item i,
.contact-icon i,
.stat-card-icon i,
.meta-icon i,
.detail-panel-icon,
.cta-icon,
.home-stat-icon i {
  color: var(--yb-primary) !important;
}
.contact-icon,
.stat-card-icon,
.meta-icon,
.cta-icon,
.home-stat-icon {
  background: rgba(37,99,235,0.08) !important;
  border-color: rgba(37,99,235,0.12) !important;
}

/* 服务项标题下划线 */
.services .service-item h4::after {
  background: var(--yb-grad-blue) !important; height: 3px; border-radius: 2px;
}

/* ==========================================
   产品卡片
   ========================================== */
.product-card .product-group { color: var(--yb-primary) !important; font-weight: 600; }
.model-badge {
  background: var(--yb-grad-blue) !important; color: #fff !important;
  box-shadow: var(--yb-shadow-blue);
}
.product-image {
  background: var(--yb-bg-soft) !important;
  border-bottom: 1px solid var(--yb-border) !important;
}
.product-image-placeholder {
  background: linear-gradient(135deg,#f8fafc 0%,#f1f5f9 100%) !important;
  border: 2px dashed var(--yb-border) !important;
  color: var(--yb-text-muted) !important;
}

/* ==========================================
   侧边栏
   ========================================== */
.product-sidebar { position: sticky; top: 100px; }
.product-sidebar h4 {
  color: var(--yb-text) !important;
  border-bottom: 3px solid var(--yb-primary) !important;
  padding-bottom: 14px; margin-bottom: 16px;
}
.category-list li { border-bottom: 1px solid var(--yb-border-light) !important; }
.category-list li a { color: var(--yb-text-secondary) !important; font-size: 14px; padding: 12px 0; }
.category-list li a:hover,
.category-list li.active a { color: var(--yb-primary) !important; font-weight: 600; }
.category-list li a em {
  background: var(--yb-bg-muted) !important; color: var(--yb-text-muted) !important;
  font-size: 11px; padding: 2px 8px; border-radius: var(--yb-r-full);
}
.category-list li.active a em,
.category-list li a:hover em { background: var(--yb-primary) !important; color: #fff !important; }

/* ==========================================
   统计区域
   ========================================== */
.home-stats { padding: 40px 0 50px; }
.home-stats-card {
  background: var(--yb-bg-card) !important;
  border: 1px solid var(--yb-border) !important;
  border-radius: var(--yb-r-lg) !important;
  box-shadow: var(--yb-shadow-md) !important;
  padding: 36px 20px;
}
.home-stat-number,
.stat-card-number {
  color: var(--yb-primary) !important; font-weight: 800;
  font-size: 34px; line-height: 1.1; margin-bottom: 6px;
}
.home-stat-label,
.stat-card-label { color: var(--yb-text-secondary) !important; font-size: 14px; }
.home-stat-label::after,
.stat-card-line {
  background: var(--yb-grad-blue) !important; width: 28px; height: 3px;
  border-radius: 2px; display: block; margin-top: 8px;
}
.home-stat-item:not(:last-child)::after { background: var(--yb-border) !important; }

/* ==========================================
   关于我们
   ========================================== */
.about-kicker { color: var(--yb-primary) !important; font-size: 13px; font-weight: 700; }
.about-intro-image img {
  border-radius: var(--yb-r-lg) !important;
  box-shadow: var(--yb-shadow-md) !important;
  border: 1px solid var(--yb-border) !important;
}
.metric-index { color: rgba(37,99,235,0.08) !important; }
.metric-content strong::after { background: var(--yb-grad-blue) !important; }

/* 时间线 */
.timeline::before {
  background: linear-gradient(to bottom,var(--yb-primary),var(--yb-primary-light)) !important;
  width: 3px; border-radius: 3px;
}
.timeline-year {
  background: var(--yb-grad-blue) !important; color: #fff !important;
  box-shadow: 0 0 0 4px rgba(37,99,235,0.15) !important;
  font-size: 12px; font-weight: 700;
}

/* ==========================================
   CTA 区域
   ========================================== */
section.simple-cta {
  background: var(--yb-bg-soft) !important;
  border-top: 1px solid var(--yb-border); border-bottom: 1px solid var(--yb-border);
  padding: 70px 0;
}
section.simple-cta h4 { color: var(--yb-text) !important; font-size: 32px; }
section.simple-cta h4 em { color: var(--yb-primary) !important; }
section.simple-cta h4 strong { color: var(--yb-primary-dark) !important; }
section.simple-cta p { color: var(--yb-text-secondary) !important; }

/* ==========================================
   合作伙伴 / 资质
   ========================================== */
section.partners {
  background: var(--yb-bg-soft) !important;
  border-top: 1px solid var(--yb-border); border-bottom: 1px solid var(--yb-border);
  padding: 60px 0 50px;
}
section.partners .item {
  background: var(--yb-bg-card) !important;
  border: 1px solid var(--yb-border) !important;
  border-radius: var(--yb-r-lg) !important;
  box-shadow: var(--yb-shadow-sm) !important;
  padding: 24px 16px !important;
}
section.partners .item:hover {
  border-color: var(--yb-border-blue) !important;
  box-shadow: var(--yb-shadow-blue) !important;
  transform: translateY(-2px);
}
section.partners .item i { color: var(--yb-primary) !important; }
section.partners .item h5 { color: var(--yb-text) !important; font-size: 16px; }

/* ==========================================
   应用场景 / 项目卡片
   ========================================== */
.app-card h5,
.project-card h5 { color: var(--yb-text) !important; font-size: 16px; }
.app-card p,
.project-card p { color: var(--yb-text-secondary) !important; font-size: 13px; }

/* ==========================================
   除湿器焦点区
   ========================================== */
.dehumidifier-focus { background: var(--yb-bg) !important; }
.dehumidifier-focus-wrap { padding: 48px; }
.product-showcase-eyebrow { color: var(--yb-primary) !important; font-weight: 700; font-size: 13px; }
.product-showcase-eyebrow em { background: var(--yb-grad-blue) !important; }
.dehumidifier-focus-points span { color: var(--yb-text-secondary) !important; }
.dehumidifier-focus-points span i { color: var(--yb-primary) !important; margin-right: 6px; }
.dehumidifier-compare-panel span {
  background: var(--yb-grad-blue) !important; color: #fff !important;
  font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: var(--yb-r-sm);
}
.dehumidifier-compare-panel strong { color: var(--yb-text) !important; }
.dehumidifier-compare-panel p { color: var(--yb-text-secondary) !important; font-size: 13px; }

/* ==========================================
   产品展示轮播区
   ========================================== */
.product-showcase { background: var(--yb-bg-soft) !important; padding: 60px 0; }
.product-showcase-wrap { padding: 40px; }
.product-showcase-prev,
.product-showcase-next {
  background: #fff !important; border: 1px solid var(--yb-border) !important;
  color: var(--yb-primary) !important; border-radius: 50% !important;
  box-shadow: var(--yb-shadow-sm) !important; width: 44px; height: 44px;
}
.product-showcase-prev:hover,
.product-showcase-next:hover {
  border-color: var(--yb-primary) !important;
  box-shadow: var(--yb-shadow-blue) !important;
}

/* ==========================================
   联系页面
   ========================================== */
.contact-cta-section { background: var(--yb-bg) !important; padding: 60px 0; }
.contact-cta-card { padding: 36px 28px; }
.contact-cta-card h5 { color: var(--yb-text) !important; font-size: 17px; margin-bottom: 10px; }
.contact-cta-card p { color: var(--yb-text-secondary) !important; font-size: 14px; }
.cta-contact-info { background: var(--yb-bg-soft) !important; border-radius: var(--yb-r-sm) !important; }
.cta-contact-row a { color: var(--yb-primary) !important; font-weight: 500; }

/* 联系表单 */
#contact input,
#contact select,
#contact textarea {
  background: var(--yb-bg) !important; border: 1px solid var(--yb-border) !important;
  color: var(--yb-text) !important; border-radius: var(--yb-r-sm) !important;
  padding: 12px 15px; font-size: 14px;
  transition: border-color .2s, box-shadow .2s;
}
#contact input:focus,
#contact select:focus,
#contact textarea:focus {
  border-color: var(--yb-primary) !important;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.08) !important;
  outline: none !important;
}
#contact input::placeholder,
#contact textarea::placeholder { color: var(--yb-text-muted) !important; }
#contact label { color: var(--yb-text-secondary) !important; font-size: 14px; font-weight: 600; }

/* ==========================================
   表格
   ========================================== */
.table-bordered th,
.specs-table thead th,
.pd-specs-table thead th {
  background: var(--yb-grad-blue) !important; color: #fff !important;
  font-weight: 600; font-size: 14px; padding: 14px 18px; border: none !important;
}
.table-bordered td,
.specs-table tbody td,
.pd-specs-table tbody td {
  border-color: var(--yb-border) !important;
  color: var(--yb-text-secondary) !important; font-size: 14px; padding: 12px 18px;
}
.table-striped tbody tr:nth-of-type(odd) td,
.specs-table tbody tr:nth-child(odd) td,
.pd-specs-table tbody tr:nth-child(odd) td {
  background: var(--yb-bg-soft) !important;
}
.specs-table tbody tr:nth-child(even) td,
.pd-specs-table tbody tr:nth-child(even) td {
  background: var(--yb-bg) !important;
}

/* ==========================================
   页脚 — 浅蓝灰底
   ========================================== */
footer {
  background: var(--yb-bg-soft) !important;
  border-top: 1px solid var(--yb-border) !important;
  padding: 56px 0 28px;
}
.footer-brand {
  color: var(--yb-primary) !important; font-size: 22px; font-weight: 700;
}
.footer-title { color: var(--yb-text) !important; font-size: 15px; font-weight: 700; margin-bottom: 18px; }
.footer-links a { color: var(--yb-text-secondary) !important; font-size: 14px; }
.footer-links a:hover { color: var(--yb-primary) !important; }
.footer-contact li { color: var(--yb-text-secondary) !important; font-size: 14px; }
.footer-contact li i { color: var(--yb-primary) !important; width: 18px; }
.footer-bottom { border-top: 1px solid var(--yb-border) !important; padding-top: 20px; margin-top: 36px; }
.footer-bottom p,
.footer-bottom a { color: var(--yb-text-muted) !important; font-size: 13px; }

/* ==========================================
   回到顶部
   ========================================== */
.back-to-top {
  background: var(--yb-grad-blue) !important; color: #fff !important;
  box-shadow: var(--yb-shadow-blue) !important;
  border: none !important; width: 44px; height: 44px;
  border-radius: 50%; font-size: 16px;
}
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(37,99,235,0.35) !important; }

/* ==========================================
   浮动联系
   ========================================== */
.float-contact-btn {
  background: var(--yb-grad-blue) !important; color: #fff !important;
  box-shadow: var(--yb-shadow-blue) !important; border: none !important;
}
.float-contact-label {
  background: var(--yb-bg-card) !important; color: var(--yb-primary) !important;
  border: 1px solid var(--yb-border) !important; font-size: 12px;
}

/* ==========================================
   面包屑
   ========================================== */
.breadcrumb a { color: var(--yb-primary) !important; }
.breadcrumb-item.active { color: var(--yb-text-muted) !important; }

/* ==========================================
   详情页标签
   ========================================== */
.product-details-tabs .nav-tabs { border-bottom-color: var(--yb-border) !important; }
.product-details-tabs .nav-tabs .nav-link { color: var(--yb-text-secondary) !important; font-weight: 600; }
.product-details-tabs .nav-tabs .nav-link.active {
  color: var(--yb-primary) !important; border-bottom-color: var(--yb-primary) !important;
}

/* ==========================================
   型号选择
   ========================================== */
.model-option-card { background: var(--yb-bg-soft) !important; }
.model-code { background: var(--yb-grad-blue) !important; color: #fff !important; }
.model-spec-list li { border-top-color: var(--yb-border) !important; }
.model-spec-list span { color: var(--yb-text-muted) !important; }
.model-spec-list strong { color: var(--yb-text) !important; }

/* ==========================================
   特性列表
   ========================================== */
.feature-item i { background: rgba(37,99,235,0.08) !important; color: var(--yb-primary) !important; }

/* ==========================================
   场景卡片
   ========================================== */
.scenario-card { overflow: hidden; }
.scenario-card-info h3 { color: var(--yb-text) !important; font-size: 18px; }
.scenario-card-info span { color: var(--yb-text-secondary) !important; font-size: 13px; }
.scenario-blue-line { background: var(--yb-grad-blue) !important; height: 3px; border-radius: 2px; }

/* ==========================================
   文档下载
   ========================================== */
.doc-download-area { background: var(--yb-bg-soft) !important; border-radius: var(--yb-r-md) !important; }
.doc-download-area h5 { color: var(--yb-text) !important; }
.doc-item { background: var(--yb-bg) !important; }
.doc-item:hover { border-color: var(--yb-primary) !important; box-shadow: var(--yb-shadow-blue) !important; }
.doc-item i { color: var(--yb-primary) !important; }

/* ==========================================
   应用项
   ========================================== */
.application-item { background: var(--yb-bg-soft) !important; border-radius: var(--yb-r-sm) !important; }
.application-item i { color: var(--yb-primary) !important; }
.application-item span { color: var(--yb-text-secondary) !important; font-size: 13px; }

/* ==========================================
   产品详情页 PD 组件
   ========================================== */
.pd-section { padding: 32px; margin-bottom: 24px; }
.pd-overline {
  color: var(--yb-primary) !important; font-size: 12px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
}
.pd-section-head p { color: var(--yb-text-secondary) !important; margin-top: 6px; }
.pd-head-icon { background: rgba(37,99,235,0.08) !important; color: var(--yb-primary) !important; }

.pd-feature-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 16px; }
.pd-feature-item { padding: 20px; border-radius: var(--yb-r-md) !important; }
.pd-feature-item:hover { border-color: var(--yb-border-blue) !important; box-shadow: var(--yb-shadow-blue) !important; }
.pd-feature-item i { color: var(--yb-primary) !important; font-size: 22px; margin-bottom: 10px; }
.pd-feature-item h4 { color: var(--yb-text) !important; font-size: 15px; margin-bottom: 6px; }
.pd-feature-item p { color: var(--yb-text-secondary) !important; font-size: 13px; margin-bottom: 0; }

/* ==========================================
   分组标题
   ========================================== */
.group-header { padding: 24px 28px; margin-bottom: 20px; }
.group-header h3 { font-size: 22px; margin-bottom: 6px; }
.group-header p { color: var(--yb-text-secondary) !important; font-size: 14px; margin-bottom: 0; }

/* ==========================================
   粒子画布
   ========================================== */
#particles-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0; opacity: 0.35;
}

/* ==========================================
   科技背景装饰
   ========================================== */
.tech-grid-bg {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0; opacity: 0.25;
  background-image:
    linear-gradient(rgba(37,99,235,0.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(37,99,235,0.03) 1px,transparent 1px);
  background-size: 50px 50px;
}

/* ==========================================
   加载动画
   ========================================== */
.tech-loading {
  display: inline-block; width: 20px; height: 20px;
  border: 2px solid var(--yb-border); border-top-color: var(--yb-primary);
  border-radius: 50%; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ==========================================
   脉冲光效
   ========================================== */
.tech-pulse { animation: tech-pulse 2s ease-in-out infinite; }
@keyframes tech-pulse {
  0%,100% { box-shadow: 0 0 5px rgba(37,99,235,0.15); }
  50%      { box-shadow: 0 0 16px rgba(37,99,235,0.25); }
}

/* ==========================================
   响应式
   ========================================== */
@media (max-width: 767px) {
  .header-area, .background-header {
    background: rgba(255,255,255,0.96) !important;
    backdrop-filter: blur(16px) saturate(160%);
    border-bottom: 1px solid var(--yb-border) !important;
  }
  .header-area .main-nav .nav li a,
  .header-area .main-nav .nav li:last-child a {
    color: var(--yb-text-secondary) !important; background: transparent !important;
    box-shadow: none !important; border: none !important;
  }
  .header-area .main-nav .nav li a.active,
  .header-area .main-nav .nav li a:hover {
    background: rgba(37,99,235,0.06) !important; color: var(--yb-primary) !important;
  }
  .page-heading { padding: 150px 0 60px; }
  .page-heading h2 { font-size: 32px; letter-spacing: 2px; }
  .section-heading h4 { font-size: 24px; }
  .section-heading { margin-bottom: 36px; }
  .home-stats-card { padding: 24px 12px; }
  .product-sidebar { position: static; }
  .dehumidifier-focus-wrap { padding: 24px; }
  .product-showcase-wrap { padding: 24px; }
  .pd-section { padding: 20px; }
  .pd-feature-grid { grid-template-columns: 1fr; }
}

@media (max-width: 991px) {
  .section-heading h4 { font-size: 28px; }
  section.simple-cta h4 { font-size: 26px; }
}