*{margin:0;padding:0;box-sizing:border-box;font-family:Microsoft YaHei}
body{background:#f5f7fa;color:#222;padding-top:80px}
.container{max-width:1200px;margin:0 auto;padding:0 15px}

.header{background:#0f172a;color:#fff;padding:22px 0;position:fixed;top:0;left:0;width:100%;z-index:9999;box-shadow:0 2px 12px rgba(0,0,0,0.2)}
.nav{display:flex;justify-content:space-between;align-items:center}
.logo{font-size:24px;font-weight:bold;color:#fff}
.menu{display:flex;gap:30px;align-items:center}
.menu a{color:#f1f5f9;text-decoration:none;font-size:16px;font-weight:500;transition:all 0.2s ease;white-space:nowrap}
.menu a:hover{color:#3b82f6}
.menu a.active{color:#3b82f6;font-weight:bold}

.category-bar{background:#eff6ff;padding:15px 0;border-bottom:1px solid #dbeafe}
.category-wrap{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.category-btn{padding:8px 16px;border-radius:50px;border:none;background:#dbeafe;color:#1e3a8a;font-size:13px;font-weight:500;cursor:pointer;transition:all 0.25s ease}
.category-btn.active{background:#2563eb;color:#fff}
.category-btn:hover{background:#bfdbfe}
.category-btn.active:hover{background:#1d4ed8}

.banner{background:linear-gradient(90deg,#2563eb,#3b82f6);color:#fff;text-align:center;padding:50px 0}
.banner h1{font-size:28px;margin-bottom:12px}
.banner p{font-size:16px;opacity:0.95}

.goods-section{padding:40px 0}
.section-title{font-size:28px;font-weight:bold;text-align:center;margin-bottom:20px}
.goods-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}

.goods-item{background:#fff;border-radius:12px;padding:18px;box-shadow:0 2px 8px rgba(0,0,0,0.05);display:flex;flex-direction:column;height:100%;transition:transform 0.25s ease}
.goods-item:hover{transform:translateY(-3px)}

.goods-name{font-size:16px;line-height:1.4;margin-bottom:12px;font-weight:bold}
.goods-info{display:flex;justify-content:space-between;font-size:13px;color:#64748b;margin-bottom:10px}
.sales-num{color:#ef4444;font-weight:bold}
.stock-num{color:#2563eb;font-weight:bold}
.goods-price{font-size:22px;color:#ef4444;font-weight:bold;margin-bottom:14px}
.goods-btn{display:block;background:#2563eb;color:#fff;padding:10px;text-align:center;border-radius:8px;text-decoration:none;font-size:14px;margin-top:auto}
.goods-btn:hover{background:#1d4ed8}

.advantage-section{background:#fff;padding:50px 0;margin:30px 0}
.advantage-title{font-size:28px;font-weight:bold;text-align:center;margin-bottom:30px}
.advantage-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.advantage-card{background:#f8fafc;border-radius:12px;padding:20px;display:flex;align-items:flex-start;gap:14px}
.advantage-icon{width:45px;height:45px;background:#2563eb;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff;flex-shrink:0}
.advantage-content h3{font-size:16px;margin-bottom:6px}
.advantage-content p{font-size:13px;color:#64748b;line-height:1.6}

.faq-section{background:#f8fafc;padding:50px 0;margin:40px 0}
.faq-title{font-size:28px;font-weight:bold;text-align:center;margin-bottom:30px}
.faq-container{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:#fff;border-radius:10px;overflow:hidden}
.faq-question{padding:16px 20px;background:#fff;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-size:15px;font-weight:bold;color:#1e293b}
.faq-question::after{content:'+';font-size:20px;color:#2563eb;transition:transform 0.2s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{padding:0 20px;max-height:0;overflow:hidden;transition:all 0.3s;font-size:13px;color:#64748b;line-height:1.7}
.faq-item.active .faq-answer{padding:0 20px 16px;max-height:300px}

.about-section{background:#fff;padding:60px 0;margin:40px 0}
.about-title{font-size:28px;font-weight:bold;text-align:center;margin-bottom:30px;position:relative}
.about-title::after{content:'';display:block;width:80px;height:3px;background:#2563eb;margin:12px auto 0;border-radius:2px}
.about-content{max-width:900px;margin:0 auto;font-size:14px;color:#64748b;line-height:1.8;text-align:center}

.footer{background:#0f172a;color:#cbd5e1;text-align:center;padding:25px 0}
.footer p{font-size:13px}

.float-service{position:fixed;right:8px;top:50%;transform:translateY(-50%);z-index:999;animation:floatMove 3s ease-in-out infinite alternate}
@keyframes floatMove{from{transform:translateY(-50%) translateX(0)}to{transform:translateY(-50%) translateX(-5px)}}
.float-btn{width:46px;height:130px;background:#2563eb;color:#fff;border-radius:10px 0 0 10px;display:flex;align-items:center;justify-content:center;writing-mode:vertical-rl;letter-spacing:2px;font-size:13px;font-weight:bold;text-decoration:none;box-shadow:0 3px 10px rgba(37,99,235,0.3);transition:all 0.3s}
.float-btn:hover{background:#1d4ed8;box-shadow:0 5px 14px rgba(37,99,235,0.4)}

@media(max-width:992px){.goods-grid{grid-template-columns:repeat(2,1fr)}.advantage-grid{grid-template-columns:1fr}}
@media(max-width:576px){body{padding-top:130px}.nav{flex-direction:column;gap:8px;padding-bottom:10px}.menu{gap:10px;padding:0 5px;justify-content:center;width:100%;flex-wrap:wrap}.logo{font-size:20px}.menu a{font-size:15px}.goods-grid{grid-template-columns:1fr}.banner h1{font-size:24px}.banner{padding:40px 0}}
.article-section{padding:50px 0;background:#fff;margin:30px 0}
.article-title{font-size:28px;font-weight:bold;text-align:center;margin-bottom:30px}
.article-list{max-width:900px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.article-item{background:#f8fafc;padding:18px 20px;border-radius:12px;transition:all .2s ease}
.article-item:hover{background:#eff6ff;transform:translateX(4px)}
.article-item a{color:#1e293b;text-decoration:none;font-size:16px;font-weight:500}
.article-item a:hover{color:#2563eb}
@media(max-width:576px){
.article-list{padding:0 10px}
.article-item a{font-size:15px}
}