:root{--primary:#10B981;--primary-dark:#059669;--secondary:#1E3A5F;--accent:#F59E0B;--bg:#FFFFFF;--bg-alt:#F8FAFC;--text:#C0C0C0;--text-light:#4B5563;--border:#E5E7EB;--shadow:0 1px 3px rgba(0,0,0,0.1);--radius:8px;--max-w:1200px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;line-height:1.6;color:var(--text);background:var(--bg)}a{color:var(--primary);text-decoration:none;transition:color 0.2s}a:hover{color:var(--primary-dark)}img{max-width:100%;height:auto;display:block}.container{max-width:var(--max-w);margin:0 auto;padding:0 1.5rem}.header{position:fixed;top:0;left:0;right:0;background:#1E3A5F;backdrop-filter:blur(10px);border-bottom:1px solid var(--border);z-index:1000}.header-inner{display:flex;justify-content:space-between;align-items:center;padding:0.85rem 1.5rem;max-width:var(--max-w);margin:0 auto}.topbar{background:#0E2A46;border-bottom:1px solid rgba(255,255,255,0.08);font-size:0.8rem}.topbar .header-inner{padding:0.4rem 1.5rem;justify-content:space-between;gap:1rem}.tb-left{display:flex;align-items:center;gap:1.2rem;color:#A9BFD8;white-space:nowrap;overflow:hidden}.tb-left .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--primary);margin-right:0.4rem;vertical-align:1px}.tb-left a,.tb-right a{color:#A9BFD8}.tb-left a:hover,.tb-right a:hover{color:#FFFFFF}.tb-right{display:flex;align-items:center;gap:0.7rem;color:#A9BFD8}.tb-right .tb-sep{opacity:0.5}.topbar .lang-switch{background:rgba(255,255,255,0.10)}.topbar .lang-switch a{color:#D8E2EE}.topbar .lang-switch a:hover{background:rgba(255,255,255,0.18);color:#FFF}.topbar .lang-switch a.active{background:var(--primary);color:#FFF}.logo{display:flex;align-items:center;gap:0.5rem;font-size:1.5rem;font-weight:700;color:var(--secondary)}.logo span{color:var(--primary)}.nav{display:flex;gap:1.6rem;align-items:center;flex:1;justify-content:flex-end}.nav a{color:#D3D3D3;font-weight:500;padding:0.5rem 0;position:relative}.nav a:hover,.nav a.active{color:#FFF}.nav a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--primary);transition:width 0.2s}.nav a:hover::after,.nav a.active::after{width:100%}.lang-switch{display:flex;gap:0.15rem;padding:0.15rem;background:var(--bg-alt);border-radius:var(--radius);flex-wrap:nowrap}.lang-switch a{padding:0.15rem 0.45rem;border-radius:4px;font-size:0.78rem;font-weight:500;color:#1E3A5F;white-space:nowrap}.lang-switch a:hover{color:#FFF}.lang-switch a.active{background:var(--primary);color:#FFF}.mobile-menu{display:none;cursor:pointer;padding:0.5rem}.mobile-menu span{display:block;width:24px;height:2px;background:var(--text);margin:5px 0;transition:0.3s}.hero{padding:10rem 0 5rem;background:linear-gradient(135deg,#ECFDF5 0%,#F0FDF4 100%);position:relative;overflow:hidden}.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:60%;height:200%;background:radial-gradient(circle,rgba(16,185,129,0.1) 0%,transparent 70%)}.hero-content{position:relative;z-index:1}.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;line-height:1.2;margin-bottom:1.5rem;color:var(--secondary)}.hero p{font-size:1.25rem;color:var(--text-light);max-width:600px;margin-bottom:2rem}.btn{display:inline-block;padding:0.875rem 2rem;background:var(--primary);color:#fff;border-radius:var(--radius);font-weight:600;transition:all 0.2s;border:none;cursor:pointer}.btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 4px 12px rgba(16,185,129,0.3)}.btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary)}.btn-outline:hover{background:var(--primary);color:#fff}.section{padding:5rem 0}.section-alt{background:var(--bg-alt)}.section-header{text-align:center;max-width:700px;margin:0 auto 3rem}.section-header h2{font-size:clamp(1.75rem,4vw,2.5rem);margin-bottom:1rem;color:var(--secondary)}.section-header p{color:var(--text-light)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.feature-card{background:var(--bg);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;transition:transform 0.2s,box-shadow 0.2s}.feature-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,0.1)}.feature-icon{width:64px;height:64px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:12px;display:flex;align-items:center;justify-content:center;margin:0 auto 1.5rem;font-size:1.75rem}.feature-card h3{margin-bottom:0.75rem;color:var(--secondary)}.feature-card p{color:var(--text-light);font-size:0.95rem}.products-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}.product-card{background:var(--bg);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform 0.2s}.product-card:hover{transform:translateY(-4px)}.product-image{height:220px;background:linear-gradient(135deg,#ECFDF5,#D1FAE5);display:flex;align-items:center;justify-content:center;font-size:4rem}.product-content{padding:1.5rem}.product-content h3{margin-bottom:0.5rem;color:var(--secondary)}.product-content p{color:var(--text-light);font-size:0.9rem;margin-bottom:1rem}.product-content .tag{display:inline-block;padding:0.25rem 0.75rem;background:#ECFDF5;color:var(--primary);border-radius:20px;font-size:0.8rem;font-weight:500}.process-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:2rem}.process-item{text-align:center}.process-number{width:48px;height:48px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.25rem;margin:0 auto 1rem}.process-item h4{margin-bottom:0.5rem;color:var(--secondary)}.process-item p{color:var(--text-light);font-size:0.9rem}.testimonials-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem}.testimonial{background:var(--bg);padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow)}.testimonial p{font-style:italic;color:var(--text-light);margin-bottom:1.5rem;line-height:1.8}.testimonial-author{display:flex;align-items:center;gap:1rem}.testimonial-avatar{width:48px;height:48px;background:var(--primary);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}.testimonial-info h5{color:var(--secondary);font-size:1rem}.testimonial-info span{color:var(--text-light);font-size:0.85rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:2rem;text-align:center}.stat-item h3{font-size:3rem;font-weight:800;color:var(--primary);margin-bottom:0.5rem}.stat-item p{color:var(--text-light);font-weight:500}.blog-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:2rem}.blog-card{background:var(--bg);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}.blog-image{height:200px;background:linear-gradient(135deg,#FEF3C7,#FDE68A);display:flex;align-items:center;justify-content:center;font-size:3rem}.blog-content{padding:1.5rem}.blog-content h3{margin-bottom:0.5rem;color:var(--secondary);font-size:1.1rem}.blog-content p{color:var(--text-light);font-size:0.9rem;margin-bottom:1rem}.blog-meta{font-size:0.8rem;color:var(--text-light)}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem}.contact-info h3{margin-bottom:1.5rem;color:var(--secondary)}.contact-item{display:flex;gap:1rem;margin-bottom:1.5rem}.contact-icon{width:48px;height:48px;background:#ECFDF5;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:1.25rem}.contact-item h5{color:var(--secondary);margin-bottom:0.25rem;font-size:0.9rem}.contact-item p{color:var(--text-light);font-size:0.9rem}.contact-form{background:var(--bg-alt);padding:2rem;border-radius:var(--radius)}.form-group{margin-bottom:1.25rem}.form-group label{display:block;margin-bottom:0.5rem;font-weight:500;color:var(--secondary)}.form-group input,.form-group textarea,.form-group select{width:100%;padding:0.75rem 1rem;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;font-family:inherit;transition:border-color 0.2s,box-shadow 0.2s}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(16,185,129,0.1)}.form-group textarea{min-height:120px;resize:vertical}.footer{background:var(--secondary);color:#fff;padding:4rem 0 2rem}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:3rem;margin-bottom:3rem}.footer-brand h4{font-size:1.5rem;margin-bottom:1rem}.footer-brand p{color:rgba(255,255,255,0.7);font-size:0.9rem;line-height:1.8}.footer-links h5{font-size:1rem;margin-bottom:1rem}.footer-links ul{list-style:none}.footer-links li{margin-bottom:0.5rem}.footer-links a{color:rgba(255,255,255,0.7);font-size:0.9rem;transition:color 0.2s}.footer-links a:hover{color:var(--primary)}.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:2rem;display:flex;justify-content:space-between;align-items:center;font-size:0.85rem;color:rgba(255,255,255,0.6)}.breadcrumb{padding:8rem 0 2rem;background:var(--bg-alt)}.breadcrumb ul{display:flex;gap:0.5rem;list-style:none;font-size:0.9rem}.breadcrumb a{color:var(--text-light)}.breadcrumb a:hover{color:var(--primary)}.breadcrumb span{color:var(--text-light)}.page-header{padding:8rem 0 4rem;background-image:url('../images/sunopen-banner.webp');background-size:cover;background-position:center;background-repeat:no-repeat;position:relative;text-align:center}.page-header h1{font-size:clamp(2rem,4vw,3rem);color:var(--secondary);margin-bottom:1rem}.page-header p{color:var(--text-light);max-width:600px;margin:0 auto}.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start}.page-header2{padding:8rem 0 4rem;background-image:url('../images/table-2.webp');background-size:cover;background-position:center;background-repeat:no-repeat;position:relative;text-align:center}.page-header2 h1{font-size:clamp(2rem,4vw,3rem);color:var(--secondary);margin-bottom:1rem}.page-header2 p{color:var(--text-light);max-width:600px;margin:0 auto}.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:start}.product-gallery{background:linear-gradient(135deg,#ECFDF5,#D1FAE5);border-radius:var(--radius);padding:3rem;display:flex;align-items:center;justify-content:center;min-height:400px;font-size:8rem}.product-info h1{color:var(--secondary);margin-bottom:1rem}.product-info .sku{color:var(--text-light);font-size:0.9rem;margin-bottom:1.5rem}.product-info .price{font-size:2rem;color:var(--primary);font-weight:700;margin-bottom:1.5rem}.product-info h4{color:var(--secondary);margin-bottom:0.5rem}.product-info ul{list-style:none;margin-bottom:2rem}.product-info li{padding:0.5rem 0;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:0.5rem}.product-info li::before{content:'✓';color:var(--primary);font-weight:bold}.solution-card{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center;padding:3rem 0;border-bottom:1px solid var(--border)}.solution-card:nth-child(even){direction:rtl}.solution-card:nth-child(even)>*{direction:ltr}.solution-icon{width:100%;height:300px;background:linear-gradient(135deg,#ECFDF5,#D1FAE5);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:6rem}.solution-content h3{color:var(--secondary);margin-bottom:1rem;font-size:1.5rem}.solution-content p{color:var(--text-light);margin-bottom:1.5rem}.solution-content ul{list-style:none}.solution-content li{padding:0.5rem 0;display:flex;align-items:center;gap:0.75rem;color:var(--text-light)}.solution-content li::before{content:'●';color:var(--primary);font-size:0.5rem}.cta{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:5rem 0;text-align:center}.cta h2{margin-bottom:1rem;font-size:2.5rem}.cta p{margin-bottom:2rem;opacity:0.9;max-width:600px;margin-left:auto;margin-right:auto}.cta .btn{background:#fff;color:var(--primary);font-size:1.1rem;padding:1rem 2.5rem}.cta .btn:hover{background:var(--secondary);color:#fff}@media (max-width:968px){.nav{display:none}.mobile-menu{display:block}.nav.active{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:#2A4A6F;padding:1.5rem 1.5rem;box-shadow:0 4px 12px rgba(0,0,0,0.15);gap:1rem;border-top:1px solid rgba(255,255,255,0.15)}.nav.active a{color:#F0F2F5;font-size:1.1rem;padding:0.75rem 0;border-bottom:1px solid rgba(255,255,255,0.1);transition:all 0.2s ease}.nav.active a:hover,.nav.active a.active{color:#FFFFFF;background:rgba(255,255,255,0.12);padding-left:0.75rem;border-radius:6px}.nav.active a::after{display:none}.topbar{font-size:0.7rem}.topbar .header-inner{padding:0.25rem 0.75rem}.tb-cert,.tb-mail,.tb-sep{display:none}.topbar .lang-switch{gap:0.1rem;padding:0.1rem}.topbar .lang-switch a{padding:0.1rem 0.3rem;font-size:0.7rem}.nav.active .lang-switch{margin-top:0.75rem;background:rgba(255,255,255,0.2);align-self:flex-start;border-radius:20px}.nav.active .lang-switch a{color:#F0F2F5;padding:0.5rem 1rem;border-bottom:none}.nav.active .lang-switch a.active{background:var(--primary);color:#FFFFFF}.nav.active .lang-switch a:hover{background:rgba(255,255,255,0.2);border-radius:4px}.footer-grid{grid-template-columns:1fr 1fr}.contact-grid{grid-template-columns:1fr}.product-detail{grid-template-columns:1fr}.solution-card{grid-template-columns:1fr}.solution-card:nth-child(even){direction:ltr}.specs-compare-table{width:100%;display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}.specs-compare-table th,.specs-compare-table td{white-space:nowrap;font-size:0.8rem;padding:0.5rem}.specs-compare-table th{min-width:120px}}@media (max-width:640px){.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:1rem;text-align:center}.hero{padding:8rem 0 3rem}.section{padding:3rem 0}}@media (max-width:768px){.manual-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:480px){.manual-grid{grid-template-columns:1fr;gap:1.5rem}.manual-btn{font-size:0.8rem;padding:0.4rem 0.8rem}}@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn 0.6s ease-out forwards}.lang-sw{position:relative;display:inline-block}.lang-btn{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.10);color:#D8E2EE;border:1px solid rgba(255,255,255,0.35);border-radius:5px;padding:3px 9px;font-size:13px;cursor:pointer;line-height:1.5;font-family:inherit;white-space:nowrap}.lang-btn:hover{background:rgba(255,255,255,0.18);color:#FFF}.lang-btn img,.lang-menu img{width:20px;height:14px;object-fit:cover;border-radius:2px;vertical-align:middle;flex-shrink:0}.lang-caret{display:inline-block;width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;margin-left:3px}.lang-menu{display:none;position:absolute;right:0;top:calc(100% + 6px);background:#fff;border:1px solid #d5e8e6;border-radius:10px;box-shadow:0 8px 22px rgba(15,42,42,.18);min-width:178px;padding:6px;flex-direction:column;z-index:1200}.lang-sw.open .lang-menu{display:flex}.lang-menu a{display:flex;align-items:center;gap:8px;padding:7px 10px;border-radius:7px;color:#0f2a2a;font-size:13px;text-decoration:none;white-space:nowrap}.lang-menu a:hover{background:#e6f7f5;color:#0e7a72}.lang-menu a.cur{font-weight:700;color:#0e7a72}@media (max-width:768px){.topbar .lang-btn{padding:2px 6px;font-size:12px}.topbar .lang-btn img,.topbar .lang-menu img{width:18px;height:12px}.lang-menu{min-width:160px}}
/* GEO: 可见 FAQ 区块（与 FAQPage schema 逐字对应，避免 cloaking） */.faq-section{padding:5rem 0;background:var(--bg-alt,#F8FAFC)}.faq-item{background:#fff;border:1px solid var(--border,#E5E7EB);border-radius:var(--radius,8px);padding:1.25rem 1.5rem;margin-bottom:1rem}.faq-item h3{margin:0 0 .5rem;font-size:1.125rem;color:var(--secondary,#1E3A5F)}.faq-item p{margin:0;color:var(--text-light,#4B5563);line-height:1.7}

/* ============================================================
   Mobile horizontal-overflow hardening (<=768px)
   Goal: documentElement.scrollWidth == viewport width on small screens,
   desktop rendering untouched. !important is intentional - each page ships
   its own inline <style> after this file, so equal-specificity rules lose.
   - tables become their own horizontal scroll container
   - grid tracks whose min floor exceeds the viewport clamp down to 100%
   - unbreakable words may break (overflow-wrap:anywhere lowers min-content)
   ============================================================ */
@media (max-width:768px){
  h1,h2,h3,h4,h5,p,li,td,th,a,span,blockquote,label,
  .model-card h3,.stat-item h3{
    overflow-wrap:anywhere!important;
    word-break:break-word!important;
  }
  .testimonials-grid{
    grid-template-columns:repeat(auto-fit,minmax(min(320px,100%),1fr))!important;
  }
  .product-models{
    grid-template-columns:repeat(auto-fit,minmax(min(130px,100%),1fr))!important;
  }
  table,.comparison-table,.specs-table,.specs-compare-table{
    display:block!important;
    width:100%!important;
    overflow-x:auto!important;
    -webkit-overflow-scrolling:touch;
  }
  .article-nav{flex-wrap:wrap!important}
  .article-nav a,.share-btn,.manual-btn{min-width:0!important}
  .product-gallery-container,.gallery-thumbs-container,
  .gallery-thumbs,.gallery-main-wrapper{max-width:100%!important}
}

/* ============================================================
   Wide data tables must scroll inside their own box instead of
   pushing the whole document wider (fixes desktop horizontal scroll
   on the fixed-voltage-buck-mppt pages, where the comparison matrix
   is ~1240-1330px wide).
   Safe at every width: these classes already carry width:100%.
   ============================================================ */
.comparison-table,.specs-table,.specs-compare-table{
  display:block;
  width:100%;
  max-width:100%;
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}