*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--primary:#000;--primary-light:#333;--accent:#ff5722;--accent-hover:#e64a19;--bg:#fff;--bg-alt:#f8f9fa;--text:#1a1a1a;--text-light:#666;--text-muted:#999;--border:#e5e5e5;--shadow:0 2px 8px rgba(0,0,0,0.08);--shadow-lg:0 4px 20px rgba(0,0,0,0.12);--radius:8px;--radius-lg:12px;--transition:0.3s ease}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.6;color:var(--text);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
ul{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1rem}
.section{padding:4rem 0}
.section-title{font-size:1.75rem;font-weight:700;text-align:center;margin-bottom:1rem;color:var(--text)}
.section-desc{text-align:center;color:var(--text-light);margin-bottom:2.5rem;max-width:600px;margin-left:auto;margin-right:auto}
.section-cta{text-align:center;margin-top:2.5rem}
.alt-bg{background:var(--bg-alt)}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:0.75rem 1.5rem;border-radius:var(--radius);font-weight:600;font-size:0.95rem;cursor:pointer;border:none;transition:all var(--transition);text-align:center}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-light);color:#fff}
.btn-secondary{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-secondary:hover{background:var(--primary);color:#fff}
.btn-outline{background:transparent;color:#fff;border:2px solid #fff}
.btn-outline:hover{background:#fff;color:var(--primary)}
.btn-text{background:transparent;color:var(--primary);padding:0.5rem 0}
.btn-text:hover{color:var(--accent)}
.btn-lg{padding:1rem 2rem;font-size:1.05rem}
.btn-block{width:100%}
.link-more{color:var(--accent);font-weight:500}
.link-more:hover{text-decoration:underline}
.site-header{position:sticky;top:0;z-index:1000;background:var(--bg);border-bottom:1px solid var(--border);padding:0.75rem 0}
.header-inner{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:0.5rem}
.logo-icon{width:36px;height:36px;color:var(--primary)}
.logo-text{font-size:1.1rem;font-weight:700;color:var(--primary)}
.main-nav{display:flex;align-items:center;gap:1.5rem}
.main-nav a{color:var(--text);font-weight:500;font-size:0.95rem;padding:0.5rem 0;position:relative}
.main-nav a:hover,.main-nav a.active{color:var(--primary)}
.main-nav a.active::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--primary)}
.nav-cta{background:var(--primary);color:#fff !important;padding:0.5rem 1rem !important;border-radius:var(--radius)}
.nav-cta:hover{background:var(--primary-light)}
.nav-cta.active::after{display:none}
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:0.5rem}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--primary);transition:var(--transition)}
.breadcrumb{display:flex;align-items:center;gap:0.5rem;font-size:0.9rem;color:var(--text-light);margin-bottom:1rem}
.breadcrumb a{color:var(--text-light)}
.breadcrumb a:hover{color:var(--primary)}
.page-hero{background:var(--bg-alt);padding:3rem 0}
.page-hero h1{font-size:2rem;font-weight:700;margin-bottom:0.75rem}
.page-hero p{color:var(--text-light);font-size:1.1rem}
.hero-btns{display:flex;gap:1rem;flex-wrap:wrap;justify-content:center}
.breadcrumb-section{background:var(--bg-alt);padding:0.75rem 0;font-size:0.9rem;color:var(--text-light)}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.intro-text p{margin-bottom:1rem;color:var(--text-light)}
.intro-btns{display:flex;gap:1rem;margin-top:1.5rem;flex-wrap:wrap}
.intro-img img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.products-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.product-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;text-align:center;position:relative;transition:var(--transition)}
.product-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.product-card.featured{border-color:var(--primary);border-width:2px}
.product-badge{position:absolute;top:-10px;right:20px;background:var(--accent);color:#fff;padding:0.25rem 0.75rem;border-radius:20px;font-size:0.8rem;font-weight:600}
.product-img{margin-bottom:1rem}
.product-img img{width:100%;aspect-ratio:1;object-fit:contain;border-radius:var(--radius)}
.product-card h3{font-size:1.1rem;margin-bottom:0.5rem}
.product-desc{font-size:0.9rem;color:var(--text-light);margin-bottom:0.75rem}
.product-price{font-weight:700;color:var(--accent);margin-bottom:1rem}
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.feature-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;text-align:center;transition:var(--transition)}
.feature-card:hover{box-shadow:var(--shadow)}
.feature-icon{width:48px;height:48px;margin:0 auto 1rem;color:var(--primary)}
.feature-icon svg{width:100%;height:100%}
.feature-card h3{font-size:1rem;margin-bottom:0.5rem}
.feature-card p{font-size:0.9rem;color:var(--text-light)}
.guide-flex{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.guide-img img{border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.guide-content h2{font-size:1.5rem;margin-bottom:1rem}
.guide-content p{color:var(--text-light);margin-bottom:1rem}
.guide-list{margin:1.5rem 0}
.guide-list li{padding:0.5rem 0 0.5rem 1.5rem;position:relative;color:var(--text-light)}
.guide-list li::before{content:'✓';position:absolute;left:0;color:var(--primary);font-weight:700}
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.faq-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}
.faq-item h3{font-size:1rem;margin-bottom:0.75rem}
.faq-item p{font-size:0.9rem;color:var(--text-light);margin-bottom:0.75rem}
.recommend-section .recommend-list{display:grid;grid-template-columns:repeat(2,1fr);gap:0.75rem}
.recommend-list li{background:var(--bg-alt);padding:1rem;border-radius:var(--radius);display:flex;justify-content:space-between;align-items:center;gap:1rem}
.recommend-list li a{flex:1;font-weight:500}
.recommend-list li span{font-size:0.85rem;color:var(--text-muted);white-space:nowrap}
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff}
.cta-box{text-align:center;padding:2rem}
.cta-box h2{color:#fff;margin-bottom:0.75rem}
.cta-box p{opacity:0.9;margin-bottom:1.5rem}
.cta-box .btn-primary{background:#fff;color:var(--primary)}
.cta-box .btn-primary:hover{background:rgba(255,255,255,0.9)}
.cta-box .btn-secondary{border-color:#fff;color:#fff}
.cta-box .btn-secondary:hover{background:#fff;color:var(--primary)}
.site-footer{background:var(--primary);color:#fff;padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;margin-bottom:2rem}
.footer-col h4{font-size:1rem;margin-bottom:1rem;font-weight:600}
.footer-col ul li{margin-bottom:0.5rem}
.footer-col a{color:rgba(255,255,255,0.8);font-size:0.9rem}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding-top:1.5rem;text-align:center;font-size:0.85rem;color:rgba(255,255,255,0.7)}
.footer-links{margin-top:0.5rem}
.footer-links a{color:rgba(255,255,255,0.6);margin:0 0.5rem}
.floating-contact{position:fixed;bottom:2rem;right:2rem;z-index:999}
.floating-btn{display:flex;align-items:center;justify-content:center;width:56px;height:56px;background:var(--accent);color:#fff;border-radius:50%;box-shadow:var(--shadow-lg);transition:var(--transition)}
.floating-btn:hover{background:var(--accent-hover);transform:scale(1.1);color:#fff}
.floating-btn svg{width:24px;height:24px}
.compare-table-wrap{overflow-x:auto}
.compare-table{width:100%;border-collapse:collapse;font-size:0.9rem}
.compare-table th,.compare-table td{padding:1rem;text-align:center;border:1px solid var(--border)}
.compare-table th{background:var(--primary);color:#fff;font-weight:600}
.compare-table td:first-child{background:var(--bg-alt);font-weight:600;text-align:left}
.compare-table tr:hover td{background:rgba(0,0,0,0.02)}
.product-detail{padding:4rem 0}
.product-detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.product-detail-grid.reverse{direction:rtl}
.product-detail-grid.reverse > *{direction:ltr}
.product-detail-img img{width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.product-tag{display:inline-block;background:var(--bg-alt);color:var(--primary);padding:0.25rem 0.75rem;border-radius:20px;font-size:0.85rem;font-weight:600;margin-bottom:0.75rem}
.product-tag.hot{background:var(--accent);color:#fff}
.product-detail-info h2{font-size:1.75rem;margin-bottom:0.5rem}
.product-price-lg{font-size:1.25rem;color:var(--accent);font-weight:700;margin-bottom:1rem}
.product-detail-info p{color:var(--text-light);margin-bottom:1rem}
.product-detail-info h3{font-size:1rem;margin:1.5rem 0 0.75rem;color:var(--text)}
.feature-list{margin:0 0 1.5rem}
.feature-list li{padding:0.4rem 0 0.4rem 1.5rem;position:relative;color:var(--text-light);font-size:0.95rem}
.feature-list li::before{content:'•';position:absolute;left:0;color:var(--primary);font-weight:700}
.product-cta{display:flex;gap:1rem;margin-top:1.5rem;flex-wrap:wrap}
.choice-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.choice-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}
.choice-card h3{font-size:1rem;margin-bottom:0.75rem}
.choice-card p{font-size:0.9rem;color:var(--text-light)}
.choice-card .recommend{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border);font-size:0.9rem}
.choice-card .recommend strong{color:var(--primary)}
.purchase-info{max-width:800px;margin:0 auto;text-align:center}
.purchase-info p{color:var(--text-light);margin-bottom:1rem}
.purchase-list{display:flex;justify-content:center;gap:2rem;margin:1.5rem 0;flex-wrap:wrap}
.purchase-list li{color:var(--text)}
.purchase-cta{display:flex;gap:1rem;justify-content:center;margin-top:2rem;flex-wrap:wrap}
.guide-toc{background:var(--bg-alt);border-radius:var(--radius-lg);padding:2rem;max-width:800px;margin:0 auto}
.guide-toc h2{font-size:1.25rem;margin-bottom:1rem}
.guide-toc ul{display:grid;grid-template-columns:repeat(2,1fr);gap:0.75rem}
.guide-toc li a{display:block;padding:0.5rem 1rem;background:var(--bg);border-radius:var(--radius);color:var(--text);font-size:0.95rem;transition:var(--transition)}
.guide-toc li a:hover{background:var(--primary);color:#fff}
.guide-section{padding:3rem 0}
.guide-block{display:grid;grid-template-columns:1.2fr 0.8fr;gap:3rem;align-items:start}
.guide-block.reverse{grid-template-columns:0.8fr 1.2fr}
.guide-block.reverse .guide-img{order:-1}
.guide-content h2{font-size:1.5rem;margin-bottom:1rem;color:var(--text)}
.guide-content h3{font-size:1.1rem;margin:1.5rem 0 0.75rem;color:var(--text)}
.guide-content p{color:var(--text-light);margin-bottom:1rem;line-height:1.8}
.guide-img img{border-radius:var(--radius-lg);box-shadow:var(--shadow);position:sticky;top:100px}
.troubleshoot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.troubleshoot-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}
.troubleshoot-item h3{font-size:1rem;margin-bottom:0.75rem;color:var(--text)}
.troubleshoot-item p{font-size:0.9rem;color:var(--text-light)}
.faq-categories{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap;margin-bottom:2rem}
.faq-cat{padding:0.75rem 1.5rem;background:var(--bg-alt);border-radius:var(--radius);color:var(--text);font-weight:500;transition:var(--transition)}
.faq-cat:hover,.faq-cat.active{background:var(--primary);color:#fff}
.faq-list{max-width:900px;margin:0 auto}
.faq-item-full{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:1.5rem}
.faq-item-full h3{font-size:1.1rem;margin-bottom:1rem;color:var(--text)}
.faq-answer p{color:var(--text-light);margin-bottom:1rem;line-height:1.8}
.faq-answer p:last-child{margin-bottom:0}
.news-layout{display:grid;grid-template-columns:1fr 300px;gap:2rem}
.news-card{display:grid;grid-template-columns:250px 1fr;gap:1.5rem;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;margin-bottom:1.5rem}
.news-img img{width:100%;height:100%;object-fit:cover}
.news-content{padding:1.5rem 1.5rem 1.5rem 0}
.news-tag{display:inline-block;background:var(--bg-alt);color:var(--primary);padding:0.2rem 0.6rem;border-radius:4px;font-size:0.8rem;font-weight:600;margin-bottom:0.75rem}
.news-content h3{font-size:1.1rem;margin-bottom:0.75rem;line-height:1.4}
.news-content p{font-size:0.9rem;color:var(--text-light);margin-bottom:1rem;line-height:1.6}
.news-meta{display:flex;justify-content:space-between;align-items:center;font-size:0.85rem}
.news-meta time{color:var(--text-muted)}
.news-sidebar .sidebar-section{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:1.5rem}
.news-sidebar h3{font-size:1rem;margin-bottom:1rem;padding-bottom:0.75rem;border-bottom:1px solid var(--border)}
.sidebar-list li{margin-bottom:0.75rem}
.sidebar-list a{color:var(--text);font-size:0.9rem}
.sidebar-list a:hover{color:var(--accent)}
.safety-tips li{padding:0.5rem 0 0.5rem 1.5rem;position:relative;font-size:0.9rem;color:var(--text-light)}
.safety-tips li::before{content:'⚠';position:absolute;left:0}
.quick-links li{margin-bottom:0.5rem}
.quick-links a{display:block;padding:0.5rem;background:var(--bg-alt);border-radius:var(--radius);color:var(--text);font-size:0.9rem;text-align:center}
.quick-links a:hover{background:var(--primary);color:#fff}
.sidebar-cta{background:var(--primary);color:#fff;border-radius:var(--radius-lg);padding:1.5rem;text-align:center}
.sidebar-cta h3{color:#fff;margin-bottom:0.5rem}
.sidebar-cta p{font-size:0.9rem;opacity:0.9;margin-bottom:1rem}
.sidebar-cta .btn-primary{background:#fff;color:var(--primary)}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.topic-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;text-align:center}
.topic-icon{width:48px;height:48px;margin:0 auto 1rem;color:var(--primary)}
.topic-icon svg{width:100%;height:100%}
.topic-card h3{font-size:1rem;margin-bottom:0.5rem}
.topic-card p{font-size:0.9rem;color:var(--text-light);margin-bottom:1rem}
.about-intro{display:grid;grid-template-columns:1.5fr 1fr;gap:3rem;align-items:center}
.about-content h2{font-size:1.5rem;margin-bottom:1rem}
.about-content p{color:var(--text-light);margin-bottom:1rem;line-height:1.8}
.about-img img{border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.position-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.position-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;text-align:center}
.position-icon{width:48px;height:48px;margin:0 auto 1rem;color:var(--primary)}
.position-icon svg{width:100%;height:100%}
.position-card h3{font-size:1rem;margin-bottom:0.5rem}
.position-card p{font-size:0.9rem;color:var(--text-light)}
.declaration-box{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.declaration-item{background:var(--bg-alt);border-radius:var(--radius-lg);padding:1.5rem}
.declaration-item h3{font-size:1rem;margin-bottom:0.75rem}
.declaration-item p{font-size:0.9rem;color:var(--text-light);line-height:1.7}
.declaration-item a{color:var(--accent)}
.content-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.content-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}
.content-item h3{font-size:1rem;margin-bottom:0.75rem}
.content-item p{font-size:0.9rem;color:var(--text-light);margin-bottom:1rem}
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.why-item{text-align:center}
.why-num{display:block;font-size:2rem;font-weight:700;color:var(--primary);margin-bottom:0.5rem}
.why-item h3{font-size:1rem;margin-bottom:0.5rem}
.why-item p{font-size:0.9rem;color:var(--text-light)}
.risk-warning{display:flex;gap:1.5rem;background:#fff3e0;border:1px solid #ffcc02;border-radius:var(--radius-lg);padding:2rem;align-items:flex-start}
.warning-icon{flex-shrink:0;width:48px;height:48px;color:#f57c00}
.warning-icon svg{width:100%;height:100%}
.warning-content h2{font-size:1.25rem;margin-bottom:0.75rem;color:#e65100}
.warning-content p{color:#bf360c}
.risk-block{margin-bottom:2rem}
.risk-block h3{font-size:1.25rem;margin-bottom:1rem;padding-bottom:0.75rem;border-bottom:2px solid var(--primary)}
.risk-content p{color:var(--text-light);margin-bottom:1rem;line-height:1.8}
.risk-tips{background:var(--bg-alt);border-radius:var(--radius);padding:1.5rem;margin-top:1.5rem}
.risk-tips h4{font-size:1rem;margin-bottom:0.75rem;color:var(--primary)}
.risk-tips ul li{padding:0.4rem 0 0.4rem 1.5rem;position:relative;color:var(--text-light);font-size:0.95rem}
.risk-tips ul li::before{content:'✓';position:absolute;left:0;color:var(--primary);font-weight:700}
.disclaimer-box{background:var(--bg-alt);border-radius:var(--radius-lg);padding:2rem;max-width:900px;margin:0 auto}
.disclaimer-box h2{font-size:1.25rem;margin-bottom:1rem}
.disclaimer-box p{font-size:0.9rem;color:var(--text-light);margin-bottom:0.75rem;line-height:1.7}
.contact-layout{display:grid;grid-template-columns:1fr 320px;gap:2rem}
.contact-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2rem;margin-bottom:2rem}
.contact-card.primary{background:var(--primary);color:#fff;text-align:center}
.contact-card.primary h2{color:#fff}
.contact-card.primary p{opacity:0.9;margin-bottom:1.5rem}
.contact-card.primary .btn-primary{background:#fff;color:var(--primary)}
.contact-icon{width:48px;height:48px;margin:0 auto 1rem}
.contact-icon svg{width:100%;height:100%}
.contact-note{font-size:0.85rem;opacity:0.8;margin-top:1rem}
.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.help-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}
.help-icon{width:40px;height:40px;color:var(--primary);margin-bottom:1rem}
.help-icon svg{width:100%;height:100%}
.help-card h3{font-size:1rem;margin-bottom:0.5rem}
.help-card p{font-size:0.9rem;color:var(--text-light);margin-bottom:1rem}
.help-card ul{font-size:0.9rem;color:var(--text-light)}
.help-card ul li{padding:0.3rem 0 0.3rem 1rem;position:relative}
.help-card ul li::before{content:'•';position:absolute;left:0;color:var(--primary)}
.contact-sidebar .sidebar-section{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;margin-bottom:1.5rem}
.contact-sidebar .sidebar-section.important{background:#fff3e0;border-color:#ffcc02}
.contact-sidebar h3{font-size:1rem;margin-bottom:1rem}
.faq-quick li,.guide-quick li{margin-bottom:0.5rem}
.faq-quick a,.guide-quick a{color:var(--text);font-size:0.9rem}
.faq-quick a:hover,.guide-quick a:hover{color:var(--accent)}
.safety-reminders li{padding:0.4rem 0;font-size:0.9rem;color:#bf360c}
.pre-consult-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}
.pre-consult-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem}
.pre-consult-item h3{font-size:1rem;margin-bottom:0.75rem}
.pre-consult-item p{font-size:0.9rem;color:var(--text-light)}
.notice-box{background:#e3f2fd;border:1px solid #2196f3;border-radius:var(--radius-lg);padding:2rem;max-width:900px;margin:0 auto}
.notice-box h2{font-size:1.25rem;margin-bottom:1rem;color:#1565c0}
.notice-content p{font-size:0.9rem;color:#0d47a1;margin-bottom:0.75rem;line-height:1.7}
@media (max-width:1024px){
.products-grid,.features-grid,.choice-grid,.position-grid,.why-grid,.topic-grid{grid-template-columns:repeat(2,1fr)}
.intro-grid,.guide-flex,.product-detail-grid,.about-intro{grid-template-columns:1fr}
.product-detail-grid.reverse{direction:ltr}
.guide-block,.guide-block.reverse{grid-template-columns:1fr}
.guide-block .guide-img,.guide-block.reverse .guide-img{order:0}
.guide-img img{position:static}
.news-layout,.contact-layout{grid-template-columns:1fr}
.news-sidebar,.contact-sidebar{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
.content-grid{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
.main-nav{position:fixed;top:60px;left:0;right:0;background:var(--bg);flex-direction:column;padding:1rem;gap:0;border-bottom:1px solid var(--border);display:none}
.main-nav.active{display:flex}
.main-nav a{padding:0.75rem 0;border-bottom:1px solid var(--border);width:100%}
.main-nav a.active::after{display:none}
.nav-cta{margin-top:0.5rem;text-align:center}
.menu-toggle{display:flex}
.products-grid,.features-grid,.faq-grid,.choice-grid,.troubleshoot-grid,.position-grid,.why-grid,.topic-grid,.declaration-box,.help-grid,.pre-consult-grid{grid-template-columns:1fr}
.content-grid{grid-template-columns:1fr}
.recommend-section .recommend-list{grid-template-columns:1fr}
.recommend-list li{flex-direction:column;align-items:flex-start;gap:0.5rem}
.guide-toc ul{grid-template-columns:1fr}
.news-card{grid-template-columns:1fr}
.news-img{height:200px}
.news-content{padding:1.5rem}
.news-sidebar,.contact-sidebar{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr;text-align:center}
.hero-btns{flex-direction:column;align-items:center}
.floating-contact{bottom:1rem;right:1rem}
.floating-btn{width:48px;height:48px}
.section{padding:3rem 0}
.section-title{font-size:1.5rem}
.page-hero h1{font-size:1.5rem}
}
.hero-badge{display:inline-flex;align-items:center;gap:0.4rem;background:rgba(255,255,255,0.15);color:#fff;padding:0.4rem 0.9rem;border-radius:999px;font-size:0.85rem;font-weight:600;margin-bottom:1rem}
.reveal{opacity:0;transform:translateY(18px);transition:all 0.6s ease}
.reveal.is-visible{opacity:1;transform:translateY(0)}
.floating-btn{animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}