*{margin:0;padding:0;box-sizing:border-box}
:root{
  --brand:#1a5cb0;--brand-light:#2d7ae0;--accent:#e8740c;--accent-light:#f59035;
  --bg:#fff;--bg-alt:#f7f8fa;--border:#e5e7eb;
  --text:#1f2937;--text-dim:#4b5563;--text-mute:#9ca3af;
  --radius:4px;--shadow:0 1px 3px rgba(0,0,0,.06);
  --container:1100px;
}
html{font-size:15px;scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",sans-serif;color:var(--text);background:var(--bg);line-height:1.7}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-light)}
img{max-width:100%;height:auto;display:block}
.container{width:min(100%,var(--container));margin:0 auto;padding:0 clamp(1rem,4vw,2rem)}

/* header */
.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{font-size:16px;font-weight:700;color:var(--brand);display:flex;align-items:center;gap:8px}
.logo-icon{width:32px;height:32px;background:var(--brand);color:#fff;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
.nav{display:flex;gap:clamp(12px,2vw,24px);align-items:center}
.nav a{font-size:13px;color:var(--text-dim);transition:color .2s}
.nav a:hover,.nav a.active{color:var(--brand)}
.nav-phone{font-size:12px;color:var(--text-mute);margin-left:8px}
.menu-btn{display:none;background:none;border:none;font-size:22px;color:var(--text);cursor:pointer}
.mobile-nav{display:none;background:#fff;border-top:1px solid var(--border);padding:12px 0}
.mobile-nav a{display:block;padding:10px 20px;font-size:14px;color:var(--text-dim);border-bottom:1px solid var(--border)}
.mobile-nav a:last-child{border:none}
.mobile-nav.open{display:block}

/* hero */
.hero{background:var(--bg-alt);border-bottom:1px solid var(--border);padding:clamp(2rem,6vw,4rem) 0}
.hero h1{font-size:clamp(1.2rem,3vw,1.6rem);font-weight:700;color:var(--brand);margin-bottom:8px}
.hero p{font-size:clamp(.8rem,1.5vw,.9rem);color:var(--text-dim);max-width:600px;margin-bottom:16px}
.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:12px;margin-top:16px}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:12px;text-align:center}
.stat-num{font-size:clamp(1.1rem,2.5vw,1.5rem);font-weight:700;color:var(--brand)}
.stat-label{font-size:11px;color:var(--text-mute)}

/* section */
.section{padding:clamp(2rem,5vw,3.5rem) 0}
.section-title{font-size:clamp(.9rem,2vw,1.1rem);font-weight:700;color:var(--text);margin-bottom:16px;padding-bottom:8px;border-bottom:2px solid var(--brand);display:inline-block}

/* product grid */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.product-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color .2s}
.product-card:hover{border-color:var(--brand)}
.product-img{width:100%;height:160px;object-fit:cover;background:var(--bg-alt)}
.product-body{padding:14px}
.product-name{font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px}
.product-desc{font-size:12px;color:var(--text-mute);line-height:1.6;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product-price{font-size:16px;font-weight:700;color:var(--accent)}
.product-price small{font-size:11px;color:var(--text-mute);text-decoration:line-through;margin-left:6px;font-weight:400}
.product-actions{display:flex;gap:8px;margin-top:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:7px 14px;font-size:12px;border-radius:var(--radius);border:none;cursor:pointer;transition:all .2s;text-decoration:none}
.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-light);color:#fff}
.btn-outline{border:1px solid var(--brand);color:var(--brand);background:transparent}.btn-outline:hover{background:var(--brand);color:#fff}
.btn-block{width:100%}

/* news */
.news-list{display:flex;flex-direction:column;gap:12px}
.news-item{display:flex;gap:12px;padding:14px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.news-date{width:56px;height:56px;background:var(--brand);color:#fff;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;flex-shrink:0}
.news-date .day{font-size:18px;font-weight:700;line-height:1}
.news-date .month{font-size:10px;opacity:.8}
.news-title{font-size:13px;font-weight:600;color:var(--text);margin-bottom:4px}
.news-summary{font-size:12px;color:var(--text-mute);line-height:1.6}

/* info table */
.info-table{width:100%;border-collapse:collapse;font-size:13px}
.info-table tr:nth-child(even){background:var(--bg-alt)}
.info-table td{padding:10px 14px;border:1px solid var(--border)}
.info-table td:first-child{font-weight:600;color:var(--text);width:140px;background:var(--bg-alt)}

/* contact */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.contact-card{display:flex;gap:10px;padding:14px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.contact-icon{width:36px;height:36px;background:var(--bg-alt);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:var(--brand);flex-shrink:0;font-size:16px}
.contact-label{font-size:12px;font-weight:600;color:var(--text)}
.contact-value{font-size:12px;color:var(--text-dim)}

/* form */
.form-group{margin-bottom:14px}
.form-group label{display:block;font-size:12px;font-weight:600;color:var(--text);margin-bottom:4px}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:8px 12px;font-size:13px;border:1px solid var(--border);border-radius:var(--radius);outline:none;font-family:inherit}
.form-group input:focus,.form-group textarea:focus{border-color:var(--brand)}
.form-group textarea{resize:vertical;min-height:80px}

/* reviews */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.review-card{padding:14px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.review-stars{color:#f59e0b;font-size:12px;margin-bottom:6px}
.review-text{font-size:12px;color:var(--text-dim);line-height:1.6;margin-bottom:8px}
.review-author{font-size:11px;color:var(--text-mute)}

/* footer */
.site-footer{background:#1e293b;color:#fff;padding:clamp(2rem,5vw,3rem) 0}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-title{font-size:12px;font-weight:600;margin-bottom:10px;color:rgba(255,255,255,.8)}
.footer-text{font-size:11px;color:rgba(255,255,255,.45);line-height:1.8}
.footer-text a{color:rgba(255,255,255,.45)}.footer-text a:hover{color:#fff}
.footer-bottom{font-size:10px;color:rgba(255,255,255,.25);text-align:center}
.footer-bottom a{color:rgba(255,255,255,.25)}

/* page content */
.page-content{padding:clamp(2rem,5vw,3rem) 0}
.page-content h1{font-size:clamp(1.1rem,2.5vw,1.4rem);font-weight:700;color:var(--brand);margin-bottom:16px}
.page-content h2{font-size:clamp(.9rem,2vw,1.1rem);font-weight:700;color:var(--text);margin:20px 0 10px}
.page-content p{font-size:13px;color:var(--text-dim);margin-bottom:10px;line-height:1.8}
.page-content ul{font-size:13px;color:var(--text-dim);padding-left:20px;margin-bottom:10px}
.page-content li{margin-bottom:6px}

/* breadcrumb */
.breadcrumb{font-size:12px;color:var(--text-mute);margin-bottom:16px}
.breadcrumb a{color:var(--text-mute)}.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{margin:0 4px}

/* float btns */
.float-btns{position:fixed;right:16px;bottom:60px;z-index:90;display:flex;flex-direction:column;gap:10px}
.float-btn{width:40px;height:40px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;box-shadow:var(--shadow);font-size:16px}
.float-btn-service{background:var(--accent);color:#fff}
.float-btn-top{background:var(--brand);color:#fff;display:none}

/* cookie */
.cookie-bar{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);padding:12px 0;z-index:100;box-shadow:0 -2px 8px rgba(0,0,0,.06)}
.cookie-inner{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.cookie-inner p{font-size:11px;color:var(--text-dim);flex:1;min-width:200px}
.cookie-inner button{padding:6px 16px;font-size:11px;background:var(--brand);color:#fff;border:none;border-radius:var(--radius);cursor:pointer}

/* specs */
.specs-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.spec-item{padding:10px;background:var(--bg-alt);border:1px solid var(--border);border-radius:var(--radius)}
.spec-label{font-size:11px;color:var(--text-mute);margin-bottom:2px}
.spec-value{font-size:13px;font-weight:600;color:var(--text)}

/* badge */
.badge{display:inline-block;font-size:10px;padding:2px 6px;border-radius:2px;color:#fff;margin-left:6px}
.badge-hot{background:#ef4444}
.badge-new{background:#22c55e}
.badge-rec{background:var(--brand)}

/* detail page */
.detail-header{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}
.detail-img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius);background:var(--bg-alt)}
.detail-price-box{background:#fff7ed;border-radius:var(--radius);padding:12px;margin:12px 0}

/* faq */
.faq-item{border-left:3px solid var(--brand);padding:10px 14px;margin-bottom:10px;background:var(--bg-alt);border-radius:0 var(--radius) var(--radius) 0}
.faq-q{font-size:13px;font-weight:600;color:var(--text);margin-bottom:4px}
.faq-a{font-size:12px;color:var(--text-dim)}

/* responsive */
@media(max-width:768px){
  .nav{display:none}
  .menu-btn{display:block}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .detail-header{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  .product-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}