/* ==================================================================
   旧内核兼容层（搜狗/360 等双核浏览器的兼容模式、IE 内核）
   这些内核不支持 CSS Grid、CSS 自定义属性(var)、flex gap、position:sticky。
   本层为纯回退写法，现代浏览器由文件末尾 @supports 复位块完整抵消。
   注意：伪元素一律使用单冒号写法（IE8 不识别 ::after）。
   ================================================================== */
/* 1) 自定义属性不可用时的纯色回退 */
.top-bar{background:#0284c7}
.hero{background-color:#f0f9ff}
.hero h1{background:none;color:#0f172a}
.logo{color:#075985;background:none}
.hero h1 span{color:#0284c7;background:none}
.disclaimer{background:#f1f5f9}
.section-gray{background:#f7f9fc}
/* 2) 栅格容器 → 浮动列 / 表格布局 */
body.pc-version .product-grid:after{content:"";display:table;clear:both}
body.pc-version .inline-grid-3:after{content:"";display:table;clear:both}
body.pc-version .tech-grid:after{content:"";display:table;clear:both}
body.pc-version .article-grid:after{content:"";display:table;clear:both}
body.pc-version .hero-inner:after{content:"";display:table;clear:both}
body.pc-version .footer-inner:after{content:"";display:table;clear:both}
body.pc-version .main-layout:after{content:"";display:table;clear:both}
body.pc-version .product-grid > *{float:left;width:23.5%;margin:0 2% 24px 0}
body.pc-version .product-grid > *:nth-child(4n){margin-right:0}
body.pc-version .main-content .product-grid > *{float:left;width:48%;margin:0 4% 16px 0}
body.pc-version .main-content .product-grid > *:nth-child(2n){margin-right:0}
body.pc-version .inline-grid-3 > *{float:left;width:32%;margin:0 2% 18px 0}
body.pc-version .inline-grid-3 > *:nth-child(3n){margin-right:0}
body.pc-version .tech-grid > *{float:left;width:49%;margin:0 2% 20px 0}
body.pc-version .tech-grid > *:nth-child(2n){margin-right:0}
body.pc-version .article-grid > *{float:left;width:48.7%;margin:0 2.6% 22px 0}
body.pc-version .article-grid > *:nth-child(2n){margin-right:0}
body.pc-version .hero-inner > *{float:left;width:48%;margin-right:4%}
body.pc-version .hero-inner > *:nth-child(2n){margin-right:0}
body.pc-version .footer-inner > *{float:left;width:30%;margin-right:5%}
body.pc-version .footer-inner > *:nth-child(3){margin-right:0}
body.pc-version .main-layout > .main-content{float:left;width:850px}
body.pc-version .main-layout > .sidebar{float:right;width:280px}
body.pc-version .header-inner{display:table;width:100%}
body.pc-version .header-inner > .logo{display:table-cell;vertical-align:middle;text-align:left;line-height:72px}
body.pc-version .header-inner > .nav{display:table-cell;vertical-align:middle;text-align:right}
body.pc-version .nav a + a{margin-left:52px}
body.pc-version .top-bar .container{display:table;width:100%}
body.pc-version .top-bar-left{display:table-cell;vertical-align:middle;text-align:left}
body.pc-version .top-bar-right{display:table-cell;vertical-align:middle;text-align:right}

/* ========================================
   净水设备一站通 全站统一视觉升级 v2.0
   现代专业工业风 · 全端风格统一
   ======================================== */

/* 全局重置 */
* {margin:0;padding:0;box-sizing:border-box}

/* 全局基础变量 */
:root {--color-primary:#0284c7;--color-primary-dark:#075985;--color-primary-light:#38bdf8;--color-success:#059669;--color-success-light:#10b981;--color-accent:#f97316;--color-accent-light:#fdba74;--color-purple:#7c3aed;--color-text-main:#0f172a;--color-text-secondary:#475569;--color-text-muted:#94a3b8;--color-border:#e2e8f0;--color-bg:#f8fafc;--color-white:#ffffff;--shadow-sm:0 1px 2px rgba(15, 23, 42, 0.05);--shadow-md:0 4px 12px rgba(15, 23, 42, 0.08);--shadow-lg:0 10px 30px rgba(15, 23, 42, 0.12);--shadow-glow:0 0 0 1px rgba(2, 132, 199, 0.05), 0 8px 24px rgba(2, 132, 199, 0.15);--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:20px;--transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1)}

body {font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;color:#0f172a;color:var(--color-text-main);background:#f8fafc;background:var(--color-bg);line-height:1.8;font-size:15.5px;-webkit-font-smoothing:antialiased}

.container {max-width:1240px;margin:0 auto;padding:0 24px}
a {text-decoration:none;color:inherit;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
img {max-width:100%;display:block;border-radius:10px;border-radius:var(--radius-md)}
p {margin-bottom:1rem}

/* ------------------------------ 顶部热线条 ------------------------------ */
.top-bar {background:linear-gradient(90deg, #075985 0%, #0284c7 50%, #059669 100%);color:#fff;font-size:14px;padding:9px 0;position:relative;overflow:hidden}
.top-bar::after {content:"";position:absolute;top:0;left:-100%;width:55%;height:100%;background:linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);animation:shine 3.5s infinite}
@keyframes shine {to {left:145%}}
.top-bar .container {display:block;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}
.top-bar b {color:#fef08a;font-weight:700;font-size:17px;text-shadow:0 1px 3px rgba(0,0,0,0.1);animation:pulse 2.2s infinite ease-in-out}
@keyframes pulse {0%,100% {transform:scale(1)} 50% {transform:scale(1.06)}}

/* ------------------------------ 头部导航 ------------------------------ */
.header {background:#ffffff;background:var(--color-white);box-shadow:0 4px 12px rgba(15, 23, 42, 0.08);box-shadow:var(--shadow-md);position:relative;position:sticky;top:0;z-index:100;backdrop-filter:saturate(180%) blur(10px)}
.header-inner {display:block;display:flex;justify-content:space-between;align-items:center;height:72px}
.logo {font-size:23px;font-weight:800;background-color:#075985;background:linear-gradient(90deg, #075985, #0284c7);background:linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-0.3px}
.nav {display:block;display:flex;gap:52px;align-items:center}
.nav a {font-size:16px;color:#475569;color:var(--color-text-secondary);font-weight:500;padding:25px 0;position:relative;letter-spacing:0.3px}
.nav a:hover, .nav a.active {color:#0284c7;color:var(--color-primary)}
.nav a::after {content:"";position:absolute;bottom:18px;left:50%;width:0;height:3px;background-color:#0284c7;background:linear-gradient(90deg, #0284c7, #059669);background:linear-gradient(90deg, var(--color-primary), var(--color-success));border-radius:3px;transition:all 0.3s ease;transform:translateX(-50%)}
.nav a:hover::after, .nav a.active::after {width:88%}

/* ------------------------------ Hero首屏区 ------------------------------ */
.hero {padding:70px 0 60px;background:radial-gradient(circle at 30% 20%, rgba(56, 189, 248, 0.08), transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(16, 185, 129, 0.07), transparent 50%)}
.hero-inner {display:block;display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.hero h1 {font-size:44px;line-height:1.25;font-weight:800;margin-bottom:22px;color:#0f172a;color:var(--color-text-main)}
.hero h1 span {background-color:#0284c7;background:linear-gradient(90deg, #0284c7, #059669);background:linear-gradient(90deg, var(--color-primary), var(--color-success));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p {font-size:18px;color:#475569;color:var(--color-text-secondary);margin-bottom:35px;line-height:1.7}
.hero-btns {display:block;display:flex;gap:18px;flex-wrap:wrap}
.hero-btn {display:inline-block;display:inline-flex;align-items:center;padding:14px 32px;border-radius:16px;border-radius:var(--radius-lg);font-weight:600;font-size:16px;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition);gap:8px}
.btn-primary {background-color:#0284c7;background:linear-gradient(90deg, #0284c7, #0369a1);background:linear-gradient(90deg, var(--color-primary), #0369a1);color:#fff;box-shadow:0 4px 14px rgba(2, 132, 199, 0.35)}
.btn-primary:hover {transform:translateY(-3px);box-shadow:0 8px 22px rgba(2, 132, 199, 0.45)}
.btn-secondary {background:#ffffff;background:var(--color-white);color:#0284c7;color:var(--color-primary);border:2px solid #bae6fd}
.btn-secondary:hover {transform:translateY(-3px);border-color:#0284c7;border-color:var(--color-primary);background:#f0f9ff}
.hero-img {border-radius:20px;border-radius:var(--radius-xl);box-shadow:0 0 0 1px rgba(2, 132, 199, 0.05), 0 8px 24px rgba(2, 132, 199, 0.15);box-shadow:var(--shadow-glow);transform:translateZ(0)}

/* ------------------------------ 区块标题 ------------------------------ */
.section {padding:65px 0}
.section-gray {background:#f8fafc;background:var(--color-bg)}
.section-title {font-size:32px;font-weight:800;color:#0f172a;color:var(--color-text-main);text-align:center;margin-bottom:12px;position:relative}
.section-subtitle {font-size:16px;color:#94a3b8;color:var(--color-text-muted);text-align:center;max-width:680px;margin:0 auto 45px}

/* ------------------------------ 产品卡片 ------------------------------ */
.product-grid {display:block;display:grid;grid-template-columns:repeat(4, 1fr);gap:24px}
.product-card {background:#ffffff;background:var(--color-white);border-radius:16px;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 1px 2px rgba(15, 23, 42, 0.05);box-shadow:var(--shadow-sm);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition);position:relative}
.product-card:hover {transform:translateY(-7px);box-shadow:0 10px 30px rgba(15, 23, 42, 0.12);box-shadow:var(--shadow-lg)}
.product-tag {position:absolute;top:14px;left:14px;padding:5px 12px;border-radius:20px;font-size:13px;font-weight:600;z-index:10}
.product-card img {width:100%;height:180px;object-fit:cover;border-radius:0}
.product-card h3 {font-size:18px;font-weight:700;padding:18px 20px 10px;color:#0f172a;color:var(--color-text-main)}
.product-card p {font-size:14px;color:#475569;color:var(--color-text-secondary);padding:0 20px 15px;line-height:1.7}
.product-btn {display:block;text-align:right;padding:0 20px 18px 0;color:#0284c7;color:var(--color-primary);font-weight:600;font-size:15px}
.product-card:hover .product-btn {padding-right:26px}

/* ------------------------------ 技术文章卡片网格 ------------------------------ */
.tech-grid {display:block;display:grid;grid-template-columns:repeat(2, 1fr);gap:20px}
.tech-card {background:#ffffff;background:var(--color-white);border-radius:16px;border-radius:var(--radius-lg);padding:22px;box-shadow:0 1px 2px rgba(15, 23, 42, 0.05);box-shadow:var(--shadow-sm);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition);border-left:4px solid #0284c7;border-left:4px solid var(--color-primary)}
.tech-card:hover {transform:translateY(-4px);box-shadow:0 0 0 1px rgba(2, 132, 199, 0.05), 0 8px 24px rgba(2, 132, 199, 0.15);box-shadow:var(--shadow-glow);border-left-width:6px}
.tech-card h3 {font-size:17px;font-weight:700;margin:12px 0 10px;color:#0f172a;color:var(--color-text-main);line-height:1.5}
.tech-card p {font-size:14px;color:#475569;color:var(--color-text-secondary);margin-bottom:12px;line-height:1.65}
.tech-date {font-size:13px;color:#94a3b8;color:var(--color-text-muted)}
.more-btn {text-align:center;margin-top:35px}
.more-link {display:inline-block;padding:12px 36px;background-color:#0284c7;background:linear-gradient(90deg, #0284c7, #075985);background:linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));color:#fff;border-radius:30px;font-weight:600;box-shadow:0 4px 12px rgba(2, 132, 199, 0.3)}
.more-link:hover {transform:translateY(-3px);box-shadow:0 8px 20px rgba(2, 132, 199, 0.4)}

/* ------------------------------ 页面Banner ------------------------------ */
.page-banner {background:linear-gradient(135deg, #075985 0%, #0284c7 50%, #059669 100%);color:#fff;padding:55px 0 45px}
.breadcrumb {font-size:14px;opacity:0.9;margin-bottom:16px}
.breadcrumb a {color:#bae6fd}
.page-banner h1 {font-size:34px;font-weight:800;margin-bottom:12px}
.article-meta {font-size:14px;opacity:0.9}

/* ------------------------------ 主布局 ------------------------------ */
.main-layout {display:block;display:grid;grid-template-columns:1fr 300px;gap:32px;padding:36px 0;min-height:650px}
.main-content {min-width:0}

/* ------------------------------ 文章卡片 ------------------------------ */
.article-card {background:#ffffff;background:var(--color-white);border-radius:20px;border-radius:var(--radius-xl);overflow:hidden;box-shadow:0 4px 12px rgba(15, 23, 42, 0.08);box-shadow:var(--shadow-md);padding:36px}
.article-main-img {width:100%;height:340px;object-fit:cover;border-radius:16px;border-radius:var(--radius-lg);margin-bottom:30px}
.article-content h2 {font-size:23px;color:#075985;color:var(--color-primary-dark);margin:36px 0 18px;padding-left:14px;border-left:5px solid #059669;border-left:5px solid var(--color-success);line-height:1.4;font-weight:700}
.article-content h3 {font-size:19px;color:#0284c7;color:var(--color-primary);margin:28px 0 14px;font-weight:600}
.article-content p {margin-bottom:16px;color:#475569;color:var(--color-text-secondary);line-height:1.8}
.article-content ul, .article-content ol {margin:18px 0;padding-left:28px;color:#475569;color:var(--color-text-secondary)}
.article-content li {margin-bottom:10px;padding-left:4px}
.article-content table {width:100%;border-collapse:separate;border-spacing:0;margin:24px 0;border-radius:16px;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 1px 2px rgba(15, 23, 42, 0.05);box-shadow:var(--shadow-sm)}
.article-content table th {background-color:#075985;background:linear-gradient(90deg, #075985, #0284c7);background:linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));color:#fff;padding:14px 12px;text-align:left;font-weight:600}
.article-content table td {padding:14px 12px;border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--color-border);color:#475569;color:var(--color-text-secondary)}
.article-content table tr:nth-child(even) {background:#f8fafc}
.article-content table tr:hover {background:#f0f9ff}
.disclaimer {margin-top:48px;padding:18px 22px;background:linear-gradient(to right, #f1f5f9, #f8fafc);border-radius:16px;border-radius:var(--radius-lg);font-size:13.5px;color:#94a3b8;color:var(--color-text-muted);border-left:4px solid #94a3b8;border-left:4px solid var(--color-text-muted)}

/* ------------------------------ 相关文章/产品 ------------------------------ */
.related-posts, .related-products {background:#ffffff;background:var(--color-white);border-radius:20px;border-radius:var(--radius-xl);padding:28px;margin-top:30px;box-shadow:0 4px 12px rgba(15, 23, 42, 0.08);box-shadow:var(--shadow-md)}
.related-posts h3, .related-products h3 {font-size:19px;color:#0f172a;color:var(--color-text-main);margin-bottom:22px;padding-bottom:12px;border-bottom:2px solid #e2e8f0;border-bottom:2px solid var(--color-border);font-weight:700}
.related-grid {display:block;display:grid;grid-template-columns:repeat(3, 1fr);gap:16px}
.related-item {padding:16px;border-radius:10px;border-radius:var(--radius-md);background:#f8fafc;border-left:4px solid #38bdf8;border-left:4px solid var(--color-primary-light);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.related-item:hover {background:#e0f2fe;transform:translateY(-3px);box-shadow:0 4px 12px rgba(14, 165, 233, 0.15)}
.related-item h4 {font-size:14.5px;color:#475569;color:var(--color-text-secondary);font-weight:500;margin-bottom:9px;line-height:1.5}
.post-date {font-size:12.5px;color:#94a3b8;color:var(--color-text-muted)}

/* ------------------------------ 侧边栏 ------------------------------ */
.sidebar {position:relative;position:sticky;top:95px;align-self:start}
.sidebar-widget {background:#ffffff;background:var(--color-white);border-radius:20px;border-radius:var(--radius-xl);padding:24px;margin-bottom:22px;box-shadow:0 4px 12px rgba(15, 23, 42, 0.08);box-shadow:var(--shadow-md)}
.sidebar-widget h3 {font-size:18px;color:#0f172a;color:var(--color-text-main);margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid #e2e8f0;border-bottom:2px solid var(--color-border);font-weight:700}
.category-list {list-style:none}
.cat-item {margin-bottom:10px}
.cat-item > a {display:block;padding:11px 14px;border-radius:10px;border-radius:var(--radius-md);font-weight:500;color:#475569;color:var(--color-text-secondary);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.cat-item > a:hover {background:#f1f5f9;color:#0284c7;color:var(--color-primary)}
.cat-item.active > a {background-color:#075985;background:linear-gradient(90deg, #075985, #0284c7);background:linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));color:#fff;box-shadow:0 2px 8px rgba(2, 132, 199, 0.2)}
.subcat-list {list-style:none;padding-left:16px;margin-top:6px}
.subcat-list a {display:block;padding:9px 12px;font-size:13.5px;color:#94a3b8;color:var(--color-text-muted);border-left:3px solid #e2e8f0;border-left:3px solid var(--color-border);border-radius:0 6px 6px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.subcat-list a:hover {background:#f0f9ff;color:#0284c7;color:var(--color-primary);border-left-color:#0284c7;border-left-color:var(--color-primary);padding-left:18px}

/* ------------------------------ 联系卡片 ------------------------------ */
.contact-widget {background-color:#075985;background:linear-gradient(135deg, #075985, #059669);background:linear-gradient(135deg, var(--color-primary-dark), var(--color-success));color:#fff}
.contact-widget h3 {color:#fff;border-bottom-color:rgba(255, 255, 255, 0.22)}
.contact-widget p {font-size:14.5px;opacity:0.92;margin-bottom:16px}
.contact-list {list-style:none;margin-bottom:16px}
.contact-list li {padding:10px 0;font-size:14.5px}
.contact-list b {color:#fef08a;font-size:17px;font-weight:700}
.qrcode {width:145px;height:145px;margin:12px auto;background:#fff;padding:6px;border-radius:10px;border-radius:var(--radius-md);display:block;box-shadow:0 2px 12px rgba(0,0,0,0.1)}
.qrcode-tip {text-align:center;font-size:12.5px;opacity:0.9;margin-bottom:16px}
.contact-btn {display:block;width:100%;padding:13px;text-align:center;background:#fff;color:#0284c7;color:var(--color-primary);font-weight:700;border-radius:16px;border-radius:var(--radius-lg);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.contact-btn:hover {background:#fef08a;transform:translateY(-2px);box-shadow:0 6px 16px rgba(0,0,0,0.15)}

/* ------------------------------ CTA区域 ------------------------------ */
.cta-section {background-color:#075985;background:linear-gradient(135deg, #075985, #0284c7, #059669);background:linear-gradient(135deg, var(--color-primary-dark), var(--color-primary), var(--color-success));color:#fff;padding:58px 0;text-align:center;margin-top:55px}
.cta-section h2 {font-size:30px;margin-bottom:16px;font-weight:800}
.cta-section p {font-size:17px;opacity:0.92;margin-bottom:28px}
.cta-btn {display:inline-block;padding:15px 44px;background:#fff;color:#075985;color:var(--color-primary-dark);font-weight:700;border-radius:36px;font-size:17px;box-shadow:0 6px 18px rgba(0,0,0,0.15);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.cta-btn:hover {background:#fef08a;transform:translateY(-4px);box-shadow:0 10px 28px rgba(0,0,0,0.2)}

/* ------------------------------ 页脚 ------------------------------ */
.footer {background:#0f172a;color:#cbd5e1;padding-top:56px}
.footer-inner {display:block;display:grid;grid-template-columns:2fr 1fr 1fr;gap:44px;padding-bottom:44px}
.footer-col h4 {color:#fff;font-size:18px;margin-bottom:22px;font-weight:700}
.footer-col p {font-size:14.5px;line-height:1.8;opacity:0.85}
.footer-col ul {list-style:none}
.footer-col ul li {margin-bottom:12px;font-size:14.5px;opacity:0.85}
.footer-col a:hover {color:#38bdf8}
.footer-bottom {border-top:1px solid #334155;padding:22px 0;text-align:center;font-size:13.5px;opacity:0.7}
.footer-bottom p {margin-bottom:9px}
.footer-bottom a {color:#93c5fd}

/* ------------------------------ 移动端响应式 ------------------------------ */
@media (max-width: 1024px) {
  .product-grid {grid-template-columns:repeat(2, 1fr)}
  .tech-grid {grid-template-columns:1fr}
  .hero-inner {grid-template-columns:1fr;gap:35px;text-align:center}
  .hero h1 {font-size:34px}
  .hero-btns {justify-content:center}
}

@media (max-width: 767px) {
  .container {padding:0 16px}
  .top-bar-left {display:none}
  .top-bar .container {justify-content:center;text-align:center}
  .nav {display:none}
  .header-inner {height:62px}
  .logo {font-size:19px}
  .hero {padding:45px 0 35px}
  .hero h1 {font-size:28px;line-height:1.3}
  .hero p {font-size:16px}
  .section {padding:42px 0}
  .section-title {font-size:25px}
  .product-grid {grid-template-columns:repeat(2, 1fr);gap:16px}
  .tech-grid {grid-template-columns:1fr}
  .page-banner {padding:38px 0 28px}
  .page-banner h1 {font-size:24px;line-height:1.4}
  .main-layout {grid-template-columns:1fr;gap:22px;padding:24px 0}
  .sidebar {position:static;order:2}
  .article-card {padding:22px}
  .article-main-img {height:210px;margin-bottom:22px}
  .article-content h2 {font-size:20px;margin:28px 0 14px}
  .article-content h3 {font-size:17px}
  .article-content table {font-size:13px;display:block;overflow-x:auto}
  .article-content table th, .article-content table td {padding:10px 7px}
  .related-grid {grid-template-columns:1fr}
  .related-posts, .related-products {padding:21px}
  .footer-inner {grid-template-columns:1fr;gap:32px;text-align:center}
  .cta-section {padding:42px 0}
  .cta-section h2 {font-size:24px}
  .qrcode {width:125px;height:125px}
  .nav {gap:32px}
  .main-layout {grid-template-columns:1fr}
}

/* ------------------------------ 技术文章列表页 ------------------------------ */
.article-list-section {margin-top:10px}
.article-list {display:block;display:grid;grid-template-columns:1fr;gap:18px}
.article-list-item {display:block;display:grid;grid-template-columns:180px 1fr;gap:22px;background:#ffffff;background:var(--color-white);border-radius:16px;border-radius:var(--radius-lg);padding:22px;box-shadow:0 1px 2px rgba(15, 23, 42, 0.05);box-shadow:var(--shadow-sm);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.article-list-item:hover {transform:translateY(-3px);box-shadow:0 0 0 1px rgba(2, 132, 199, 0.05), 0 8px 24px rgba(2, 132, 199, 0.15);box-shadow:var(--shadow-glow)}
.article-list-item img {width:100%;height:120px;object-fit:cover;border-radius:10px;border-radius:var(--radius-md)}
.article-list-item h3 {font-size:18px;font-weight:700;color:#0f172a;color:var(--color-text-main);margin-bottom:10px;line-height:1.5}
.article-list-item p {font-size:14px;color:#475569;color:var(--color-text-secondary);margin-bottom:10px;line-height:1.65}
.article-list-meta {display:block;display:flex;justify-content:space-between;align-items:center}
.read-more {color:#0284c7;color:var(--color-primary);font-weight:600;font-size:14px}
.article-list-item:hover .read-more {padding-right:6px}

/* ========== PC端强制桌面布局（>1024px屏幕） ========== */
@media (min-width: 1025px) {
  html, body {min-width:1200px;overflow-x:auto}
  .container {max-width:1240px;min-width:1200px;padding:0 20px}
  /* PC端永久显示完整导航，不折叠汉堡菜单 */
  .nav-toggle {display:none !important}
  .nav-menu {display:flex !important;position:static;width:auto;box-shadow:none;background:transparent;padding:0}
  .nav-menu li {margin-left:50px}
  /* 两栏布局由 .main-layout 承担；.main-content 必须是块级，否则内部卡片会被劈成两列 */
  .main-content {display:block;width:100%}
  .sidebar {position:relative;position:sticky;top:150px;height:fit-content}
  /* 产品网格PC端4列 */
  .product-grid {grid-template-columns:repeat(4, 1fr) !important}
  /* 首页典型产品3列 */
  .featured-products {grid-template-columns:repeat(3, 1fr) !important}
  /* 首页最新技术2列 */
  .tech-grid {grid-template-columns:repeat(2, 1fr) !important}
  /* 首页优势3列 */
  .advantages-grid {grid-template-columns:repeat(3, 1fr) !important}
  /* 首页合作客户6列 */
  .partners-grid {grid-template-columns:repeat(6, 1fr) !important}
  /* 面包屑水平排列 */
  .breadcrumb {white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  /* 文章图片合适大小 */
  .article-main-img {height:320px}
  /* 产品概览两栏正确 */
  .product-overview {grid-template-columns:400px 1fr !important}
  /* 产品相关推荐3列 */
  .related-products {grid-template-columns:repeat(3, 1fr) !important}
}
/* ========== PC端固定布局 - 强制桌面显示 ========== */
body.pc-version{min-width:1200px !important;background-color:#f8fafc}
body.pc-version .container{width:1200px !important;max-width:1200px !important;margin:0 auto}
body.pc-version .hamburger{display:none !important}
body.pc-version .nav-links{display:flex !important;position:static !important;flex-direction:row !important;background:none !important;box-shadow:none !important;padding:0 !important;width:auto !important}
body.pc-version .main-layout{display:flex !important;gap:30px !important;align-items:flex-start}
body.pc-version .main-content{flex:1 1 auto !important;min-width:0 !important;width:auto !important;display:block !important}
body.pc-version .sidebar{flex:0 0 280px !important;width:280px !important;display:block !important;position:sticky !important;top:95px}
body.pc-version .product-grid{grid-template-columns:repeat(4,1fr) !important}
body.pc-version .article-grid{grid-template-columns:repeat(2,1fr) !important}
body.pc-version .typical-grid{grid-template-columns:repeat(3,1fr) !important}
body.pc-version .partner-grid{grid-template-columns:repeat(6,1fr) !important}
body.pc-version .hero-content{grid-template-columns:1fr 1fr !important;gap:60px !important;align-items:center}
/* ========== 响应式规则只对移动端生效 ========== */
@media (max-width:1024px){
  body.mobile-version .container{width:100% !important;padding:0 20px}
  body.mobile-version .main-content{width:100% !important}
  body.mobile-version .product-grid{grid-template-columns:repeat(2,1fr) !important}
}
@media (max-width:767px){
  body.mobile-version .container{width:100% !important;padding:0 15px}
  body.mobile-version .hamburger{display:block !important}
  body.mobile-version .nav-links{display:none}
  body.mobile-version .nav-links.active{display:flex !important;flex-direction:column !important;position:absolute !important;top:100% !important;left:0 !important;right:0 !important;background:#fff !important;box-shadow:0 4px 20px rgba(0,0,0,0.1) !important;padding:20px !important}
  body.mobile-version .main-layout{flex-direction:column !important}
  body.mobile-version .sidebar{width:100% !important;order:2}
  body.mobile-version .product-grid,
  body.mobile-version .article-grid,
  body.mobile-version .typical-grid{grid-template-columns:1fr !important}
  body.mobile-version .partner-grid{grid-template-columns:repeat(3,1fr) !important}
  body.mobile-version .hero-content{grid-template-columns:1fr !important;text-align:center}
}
/* IE兼容降级 */
.no-flexbox .main-layout{display:block;width:100%}
.no-cssgradients .header{background:#0284c7}

/* ==================================================================
   Chrome / 通用浏览器 布局稳健性修复（v2.1）
   解决：产品详情页内容被拆成两列、表格溢出、主图溢出、长文本撑破容器
   ================================================================== */
/* 1) 栅格/弹性子项允许收缩，长内容不撑破容器 */
.main-content, .article-card, .article-content, .sidebar, .main-layout > * {min-width:0}
p, li, h1, h2, h3, h4, td, th, a, span {overflow-wrap:break-word;word-wrap:break-word}

/* 2) 表格固定布局：长参数自动换行，不再撑破正文区 */
.article-content table, table.param-table {table-layout:fixed;width:100%;word-break:break-word;overflow-wrap:break-word}
.article-content table th, .article-content table td,
table.param-table th, table.param-table td {word-break:break-word;overflow-wrap:break-word;vertical-align:top}

/* 3) 产品参数表样式（此前完全未定义，导致产品页表格裸样式） */
table.param-table {border:1px solid #e2e8f0;border:1px solid var(--color-border);border-radius:10px;border-radius:var(--radius-md);overflow:hidden;margin:16px 0;font-size:14.5px}
table.param-table th {background-color:#075985;background:linear-gradient(90deg,#075985,#0284c7);background:linear-gradient(90deg,var(--color-primary-dark),var(--color-primary));color:#fff;padding:12px 14px;text-align:left;font-weight:600;width:18%}
table.param-table td {padding:12px 14px;color:#475569;color:var(--color-text-secondary);width:32%;border-bottom:1px solid #e2e8f0;border-bottom:1px solid var(--color-border);border-right:1px solid #e2e8f0;border-right:1px solid var(--color-border)}
table.param-table tr:nth-child(even){background:#f8fafc}
table.param-table tr:last-child td{border-bottom:none}

/* 4) 产品详情主图：PC限宽400px、小屏自适应，彻底避免溢出 */
img.product-main-img {width:400px !important;max-width:100%;height:auto;float:left;margin:0 30px 16px 0}
body.mobile-version img.product-main-img {width:100% !important;float:none !important;margin:0 0 16px 0 !important}

/* 5) 产品详情页标题层级统一（此前依赖浏览器默认 h2/h3，字号不一致） */
.article-card > h2 {font-size:22px;color:#075985;color:var(--color-primary-dark);margin:0 0 16px;font-weight:700;line-height:1.5}
.article-card > h3 {font-size:19px;color:#075985;color:var(--color-primary-dark);margin:0 0 14px;font-weight:700;line-height:1.5}

/* 6) 正文区域图片不溢出容器 */
.article-card img, .main-content img {max-width:100%;height:auto}

/* 7) 产品详情页"相关产品"网格在窄正文区内保持2列，避免被4列规则挤压 */
body.pc-version .main-content .product-grid {grid-template-columns:repeat(2,1fr) !important;gap:16px !important}

/* ==================================================================
   全站缺失组件样式补全（v2.2）
   以下组件此前在 HTML 中被大量使用，但 CSS 从未定义，导致裸样式显示
   覆盖：侧边栏卡片、CTA白底按钮、技术列表卡片、移动端导航
   ================================================================== */

/* ---------- 侧边栏卡片（PC 文章页 / 技术列表页） ---------- */
.sidebar-card {background:#ffffff;background:var(--color-white);border-radius:20px;border-radius:var(--radius-xl);padding:24px;margin-bottom:22px;box-shadow:0 4px 12px rgba(15, 23, 42, 0.08);box-shadow:var(--shadow-md)}
.sidebar-card h4 {font-size:17px;color:#0f172a;color:var(--color-text-main);font-weight:700;margin:0 0 16px;padding-bottom:12px;border-bottom:2px solid #e2e8f0;border-bottom:2px solid var(--color-border)}
.sidebar-nav {list-style:none;margin:0;padding:0}
.sidebar-nav li {margin-bottom:8px}
.sidebar-nav li:last-child {margin-bottom:0}
.sidebar-nav a {display:block;padding:11px 14px;border-radius:10px;border-radius:var(--radius-md);color:#475569;color:var(--color-text-secondary);font-weight:500;font-size:14.5px;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.sidebar-nav a:hover {background:#f1f5f9;color:#0284c7;color:var(--color-primary)}
.sidebar-nav a.active {background-color:#075985;background:linear-gradient(90deg, #075985, #0284c7);background:linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));color:#fff;box-shadow:0 2px 8px rgba(2, 132, 199, 0.2)}

/* ---------- 深色咨询卡片 ---------- */
.contact-card {background-color:#075985;background:linear-gradient(135deg, #075985, #059669);background:linear-gradient(135deg, var(--color-primary-dark), var(--color-success));color:#fff}
.contact-card h4 {color:#fff;border-bottom-color:rgba(255, 255, 255, 0.22)}
.contact-card p {color:rgba(255, 255, 255, 0.95) !important}
.contact-card a {color:#fff}

/* ---------- CTA 区白底按钮（文章页） ---------- */
.btn-white {display:inline-block;padding:15px 44px;background:#fff;color:#075985;color:var(--color-primary-dark);font-weight:700;border-radius:36px;font-size:17px;box-shadow:0 6px 18px rgba(0, 0, 0, 0.15);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.btn-white:hover {background:#fef08a;transform:translateY(-4px);box-shadow:0 10px 28px rgba(0, 0, 0, 0.2)}

/* ---------- 技术文章列表卡片（PC 技术列表页） ---------- */
.article-grid {display:block;display:grid;grid-template-columns:repeat(2, 1fr);gap:22px}
.article-item {display:block;background:#ffffff;background:var(--color-white);border-radius:16px;border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 1px 2px rgba(15, 23, 42, 0.05);box-shadow:var(--shadow-sm);transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.article-item:hover {transform:translateY(-4px);box-shadow:0 0 0 1px rgba(2, 132, 199, 0.05), 0 8px 24px rgba(2, 132, 199, 0.15);box-shadow:var(--shadow-glow)}
.article-item img {width:100%;height:140px;object-fit:cover;border-radius:0}
.article-item-body {padding:16px}
.article-item-body h4 {font-size:16px;color:#0f172a;color:var(--color-text-main);font-weight:700;margin:8px 0;line-height:1.5}
.article-item-body p {font-size:13px;color:#475569;color:var(--color-text-secondary);line-height:1.65;margin:8px 0}
.tag {display:inline-block;padding:2px 10px;border-radius:6px;font-size:12px;font-weight:500;background:#e0f2fe;color:#0284c7;color:var(--color-primary)}

/* ---------- 移动端头部导航 ---------- */
.menu-toggle {display:inline-block;display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border:none;border-radius:10px;background:#f1f5f9;color:#075985;color:var(--color-primary-dark);font-size:20px;line-height:1;cursor:pointer;transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);transition:var(--transition)}
.menu-toggle:hover {background:#e2e8f0}
.mobile-nav {display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-top:1px solid #e2e8f0;border-top:1px solid var(--color-border);box-shadow:0 12px 30px rgba(15, 23, 42, 0.12);padding:14px 16px;z-index:200;flex-direction:column;gap:4px}
.mobile-nav.show {display:block;display:flex}
.mobile-nav a {display:block;padding:12px 14px;border-radius:10px;color:#475569;color:var(--color-text-secondary);font-weight:500;font-size:15.5px}
.mobile-nav a:hover {background:#f1f5f9;color:#0284c7;color:var(--color-primary)}
.mobile-nav a.active {background-color:#075985;background:linear-gradient(90deg, #075985, #0284c7);background:linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));color:#fff}

@media (max-width: 767px) {
  .article-grid {grid-template-columns:1fr}
  .article-item img {height:160px}
}



/* 产品分类页内联栅格（原内联 display:grid 改为类名，便于旧内核回退） */
.inline-grid-3{display:block;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.inline-grid-2{display:block;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@supports (display: grid) {
  /* 现代浏览器复位：抵消旧内核兼容层的浮动、固定宽度与表格布局 */
  body.pc-version .product-grid:after{content:none;display:none}
  body.pc-version .inline-grid-3:after{content:none;display:none}
  body.pc-version .tech-grid:after{content:none;display:none}
  body.pc-version .article-grid:after{content:none;display:none}
  body.pc-version .hero-inner:after{content:none;display:none}
  body.pc-version .footer-inner:after{content:none;display:none}
  body.pc-version .main-layout:after{content:none;display:none}
  body.pc-version .product-grid > *{float:none;width:auto;margin:0}
  body.pc-version .main-content .product-grid > *{float:none;width:auto;margin:0}
  body.pc-version .inline-grid-3 > *{float:none;width:auto;margin:0}
  body.pc-version .tech-grid > *{float:none;width:auto;margin:0}
  body.pc-version .article-grid > *{float:none;width:auto;margin:0}
  body.pc-version .hero-inner > *{float:none;width:auto;margin-right:0}
  body.pc-version .footer-inner > *{float:none;width:auto;margin-right:0}
  body.pc-version .main-layout > .main-content{float:none;width:auto}
  body.pc-version .main-layout > .sidebar{float:none;width:auto}
  body.pc-version .header-inner{display:flex}
  body.pc-version .header-inner > .logo{display:block;vertical-align:baseline;text-align:left;line-height:normal}
  body.pc-version .header-inner > .nav{display:flex;vertical-align:baseline;text-align:left}
  body.pc-version .nav a + a{margin-left:0}
  body.pc-version .top-bar .container{display:flex}
  body.pc-version .top-bar-left{display:inline;vertical-align:baseline;text-align:left}
  body.pc-version .top-bar-right{display:inline;vertical-align:baseline;text-align:right}
}

/* ===== 净水技术列表（PC端 article-item 扩展）===== */
.article-item {display:block;background:var(--color-white);border-radius:var(--radius-lg);padding:24px;text-decoration:none;color:inherit;border-left:4px solid var(--color-primary);box-shadow:var(--shadow-sm);transition:var(--transition)}
.article-item:hover {transform:translateY(-3px);box-shadow:var(--shadow-glow);border-left-width:6px}
.article-item h3 {font-size:17px;font-weight:700;margin:10px 0 10px;color:var(--color-text-main);line-height:1.5}
.article-tag {display:inline-block;padding:3px 10px;border-radius:6px;font-size:12px;font-weight:600}
.article-summary {font-size:14px;color:var(--color-text-secondary);line-height:1.7;margin:0 0 14px}
.article-meta-row {display:flex;justify-content:space-between;font-size:13px;color:#94a3b8}
.article-meta-row span {display:inline-flex;align-items:center;gap:4px}

/* ===== 净水技术列表（移动端 tech-item 样式）===== */
.tech-list {display:flex;flex-direction:column;gap:14px;margin-bottom:22px}
.tech-item {display:block;background:var(--color-white);border-radius:var(--radius-lg);padding:18px;text-decoration:none;color:inherit;border-left:4px solid var(--color-primary);box-shadow:var(--shadow-sm);transition:var(--transition)}
.tech-item:active {transform:scale(0.98)}
.tech-item h3 {font-size:16px;font-weight:700;margin:8px 0 8px;color:var(--color-text-main);line-height:1.5}
.item-tag {display:inline-block;padding:2px 9px;border-radius:6px;font-size:12px;font-weight:600}
.item-summary {font-size:13px;color:var(--color-text-secondary);line-height:1.65;margin:0 0 10px}
.item-meta {display:flex;justify-content:space-between;font-size:12px;color:#94a3b8}
.item-meta span {display:inline-flex;align-items:center;gap:3px}

/* 分类标签颜色（article-tag / item-tag / card-tag / product-tag 通用）*/
.tag-blue,  .article-tag.tag-blue,  .item-tag.tag-blue,  .card-tag.tag-blue,  .product-tag.tag-blue  {background:#dbeafe;color:#0369a1}
.tag-green, .article-tag.tag-green, .item-tag.tag-green, .card-tag.tag-green, .product-tag.tag-green {background:#dcfce7;color:#166534}
.tag-orange,.article-tag.tag-orange,.item-tag.tag-orange,.card-tag.tag-orange,.product-tag.tag-orange{background:#ffedd5;color:#c2410c}
.tag-purple,.article-tag.tag-purple,.item-tag.tag-purple,.card-tag.tag-purple,.product-tag.tag-purple{background:#f3e8ff;color:#7e22ce}
.tag-teal,  .article-tag.tag-teal,  .item-tag.tag-teal,  .card-tag.tag-teal,  .product-tag.tag-teal  {background:#ccfbf1;color:#0f766e}

/* 分类标题 count 标签色 */
.section-title .count {font-size:14px;font-weight:500;color:#64748b;margin-left:6px}

.card-tag{display:inline-block;padding:3px 10px;border-radius:6px;font-size:12px;font-weight:600}
.tech-date{font-size:13px;color:#94a3b8}