*{margin: 0; padding: 0; list-style: none;}
body{font-family:"微软雅黑";font-size:16px;background:#f8f5f2;color:#333;line-height:1.8;padding-bottom:70px}
a,a:hover{text-decoration: none; }
img{border:none;max-width:100%}

.clear{clear: both;}
.none,.hide{display: none;}
.fl{float:left}
.fr{float:right}


.container{width:1100px;margin:0 auto;padding:20px 0}
.box{background:#fff;padding:25px 20px;border-radius:12px;box-shadow:0 2px 8px rgba(0,0,0,.05)}

@media screen and (max-width: 768px){
	.container{width:auto;padding:20px 2%}
    .box{padding:25px 2%}
}

/* 主题 */
.header{text-align:center; margin-bottom: 20px;}
.header h1{margin-bottom:10px;font-size:24px;font-weight:700;color:#2e5e9d}
.header p{font-size:15px;color:#555}
.header .tips{color:#ff6b35;margin:10px 0;font-size:16px}

/* 快速目录悬浮 */
.menu{position:fixed;bottom:50%;transform:translateY(50%);right:20px;z-index:10}
.menu h3{border-left:4px solid #ff6b35;margin-bottom:15px;padding-left:8px;font-size:16px;color:#2e5e9d}
.menu a{display:block;margin:10px 0;color:#444;transition:all .2s ease}
.menu a:hover{color:#ff6b35;font-weight:500}

.menu .close{display:none}
.menu-btn{display:none;position:fixed;bottom:20px;left:50%;transform:translateX(-50%);background:#2e5e9d;color:#fff;padding:12px 30px;border-radius:50px;font-size:15px;font-weight:700;z-index:998;box-shadow:0 4px 15px rgba(0,0,0,.15);cursor:pointer;white-space:nowrap}

.mask{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.4);z-index:9}

@media screen and (max-width: 768px){
    .menu-btn{display:block}
    .menu{width:100%;box-sizing:border-box;display:none;bottom:0;transform:translateY(0);right:0;z-index:10}
    .menu h3{border-left:0;padding-left:0;text-align:center}
    .menu a{padding:12px 0;border-bottom:1px solid #f0f0f0}
    .menu a:hover{color:#ff6b35;font-weight:500}

    .menu .close{display:block;text-align:center;margin-top:20px;color:#999;padding:10px;cursor:pointer}
}


/* 章节 */
.chapter{padding:30px;margin-bottom:25px}
.chapter h2{color:#2e5e9d;border-left:5px solid #ff6b35;padding-left:12px;margin-bottom:20px;font-size:20px}
.chapter p{margin:14px 0;padding-left:5px;font-size:15px}
.chapter .warn{color:#e63946;font-weight:700;background:#fff5f5;padding:8px 12px;border-radius:6px;margin:10px 0}

@media screen and (max-width: 768px){
    .chapter{padding:30px 20px}
}


/* 表格 */
.table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px;border-radius:8px;overflow:hidden}
.table th{background:#2e5e9d;color:#fff;padding:12px;text-align:center}
.table td{padding:12px;border:1px solid #eee;text-align:center}
.table tr:nth-child(2n){background:#fafbfc}
.table tr:hover{background:#f0f5ff}


/* 产品 */
.goods-box{display:flex;flex-wrap:wrap;gap:20px;margin-top:20px}
.goods-card{width:48%;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.04);border:1px solid #eee}
@media screen and (max-width:768px){
    .goods-box{gap:20px 0}
    .goods-card{width:100%}
}

.goods-img{width:100%;height:300px;object-fit:cover;display:block}
.goods-info{padding:20px}
.goods-card h4{color:#2e5e9d;margin-bottom:8px;font-size:16px}
.price{color:#ff6b35;font-size:20px;font-weight:700;margin:8px 0}
.goods-info p{font-size:14px;color:#666;line-height:1.6;margin:4px 0}

.btn{background:#2e5e9d;color:#fff;padding:8px 16px;border-radius:6px;text-decoration:none;display:inline-block;margin-top:12px;font-size:14px;transition:.2s}
.btn:hover{background:#1f487e}


.footer{text-align:center;padding:25px 20px;color:#888;font-size:14px}

.back-top{position:fixed;bottom:30px;right:20px;background:#2e5e9d;color:#fff;width:42px;height:42px;border-radius:50%;text-align:center;line-height:42px;cursor:pointer;z-index:99;font-size:18px;box-shadow:0 2px 8px rgba(0,0,0,.15)}