/* 华久声屏障官网样式 - 简洁工业风 + 移动优先 */
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:#333;background:#fff;line-height:1.7}
a{color:#134a86;text-decoration:none}
a:hover{color:#e60012}
img{max-width:100%}
.wrap{max-width:1200px;margin:0 auto;padding:0 14px}
.flex{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap}
.grid3{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}

.topbar{background:#0e3a68;color:#cfe0f2;font-size:13px;padding:6px 0}
.topbar .wrap{display:flex;justify-content:space-between;flex-wrap:wrap}
.topbar .hot b{color:#ffd83d;font-size:16px;margin-left:4px}

.header{padding:14px 0}
.logo img{height:52px}
.slogan{color:#0e3a68;font-weight:bold;font-size:15px;letter-spacing:1px}

.nav{background:#134a86}
.nav .wrap{display:flex;flex-wrap:wrap}
.nav a{color:#fff;padding:13px 22px;display:block;font-size:15px}
.nav a:hover,.nav a.on{background:#0e3a68;color:#ffd83d}
.nav-drop{position:relative}
.nav-drop .drop{display:none;position:absolute;top:100%;left:0;background:#fff;min-width:230px;box-shadow:0 4px 14px rgba(0,0,0,.18);z-index:99;padding:10px 0}
.nav-drop:hover .drop{display:block}
.nav-drop .drop ul{list-style:none}
.nav-drop .drop a{color:#333;padding:8px 18px;font-size:14px}
.nav-drop .drop a:hover{background:#f0f5fb;color:#e60012}

.main{padding:24px 14px 40px;min-height:400px}

.banner{position:relative;overflow:hidden}
.banner img{width:100%;display:block}
.banner-text{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;padding-left:6%;color:#fff}
.banner-text h2{font-size:34px;text-shadow:0 2px 6px rgba(0,0,0,.5)}
.banner-text p{font-size:16px;margin-top:8px;text-shadow:0 1px 4px rgba(0,0,0,.5)}
.banner-text .btn{margin-top:16px;align-self:flex-start;background:#e60012;color:#fff;padding:10px 26px;border-radius:4px;font-size:16px}

.sec{margin:34px 0}
.sec-title{text-align:center;margin-bottom:22px}
.sec-title h2{font-size:24px;color:#134a86}
.sec-title p{color:#888;font-size:14px}
.sec-title::after{content:"";display:block;width:46px;height:3px;background:#e60012;margin:8px auto 0}

.grid-product{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pcard{border:1px solid #eee;border-radius:6px;overflow:hidden;transition:.2s;background:#fff}
.pcard:hover{box-shadow:0 4px 16px rgba(0,0,0,.12);transform:translateY(-3px)}
.pcard .img{height:190px;overflow:hidden;display:flex;align-items:center;justify-content:center;background:#f7f9fb}
.pcard img{width:100%;height:100%;object-fit:cover}
.pcard .name{padding:10px 12px;font-size:14px;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pcard .price{color:#e60012;font-weight:bold;padding:0 12px 10px;text-align:center;font-size:15px}

.grid-case{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.ccard{position:relative;border-radius:6px;overflow:hidden}
.ccard img{width:100%;height:170px;object-fit:cover;display:block}
.ccard .t{position:absolute;left:0;right:0;bottom:0;background:rgba(14,58,104,.75);color:#fff;padding:6px 10px;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.grid-art{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.acard{border-bottom:1px dashed #e5e5e5;padding:10px 0}
.acard h3{font-size:15px;font-weight:normal;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.acard p{color:#888;font-size:13px;margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.acard .date{color:#aaa;font-size:12px}

.trust{background:#0e3a68;color:#fff;padding:26px 0;margin-top:30px}
.trust .grid4{text-align:center}
.trust b{display:block;font-size:28px;color:#ffd83d}
.trust span{font-size:13px;color:#cfe0f2}

/* 服务承诺区 */
.promise{background:#f5f8fc;padding:30px 0 6px}
.promise h3{text-align:center;font-size:20px;color:#134a86;margin-bottom:20px}
.promise ul{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.promise li{background:#fff;border:1px solid #e3ebf5;border-radius:8px;padding:16px 16px 18px;border-top:3px solid #e60012}
.promise li b{display:block;color:#134a86;font-size:15px;margin-bottom:8px}
.promise li span{display:block;color:#666;font-size:13px;line-height:1.75}
@media(max-width:820px){.promise ul{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.promise ul{grid-template-columns:1fr}}

.footer{background:#222;color:#bbb;font-size:13px;padding:34px 0 0;margin-top:0}
.footer h4{color:#fff;margin-bottom:10px;font-size:15px}
.footer p{margin-bottom:6px}
.footer a{color:#bbb}
.footer a:hover{color:#fff}
.footer .big{color:#ffd83d;font-size:18px}
.footer .qr{text-align:center}
.copy{border-top:1px solid #3a3a3a;margin-top:24px;padding:14px 0;text-align:center;font-size:12px;color:#888}

.float-bar{position:fixed;right:14px;bottom:80px;display:flex;flex-direction:column;gap:8px;z-index:99}
.fb-item{background:#e60012;color:#fff;padding:10px 12px;border-radius:6px;font-size:20px;text-align:center;line-height:1.2;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.fb-item span{display:block;font-size:11px}
.fb-tel{background:#134a86}

/* 列表页 */
.crumb{color:#999;font-size:13px;margin-bottom:16px}
.crumb a{color:#666}
.page-list h1{font-size:20px;color:#134a86;border-left:4px solid #e60012;padding-left:12px;margin-bottom:18px}
.cats-row{margin-bottom:18px;font-size:14px}
.cats-row a{display:inline-block;padding:4px 14px;border:1px solid #ddd;border-radius:20px;margin:0 8px 8px 0}
.cats-row a.on{background:#134a86;color:#fff;border-color:#134a86}

/* 详情页 */
.detail h1{font-size:22px;color:#134a86;margin-bottom:8px}
.detail .meta{color:#999;font-size:13px;margin-bottom:18px}
.detail .body{font-size:15px;line-height:1.9}
.detail .body p{margin:10px 0}
.detail .body img{border-radius:4px;margin:8px 0}
.dgallery{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}
.dgallery img{border-radius:4px;border:1px solid #eee}
.price-box{background:#fff6f5;border:1px solid #ffd9d5;border-radius:6px;padding:12px 16px;margin:14px 0;font-size:15px}
.price-box b{color:#e60012;font-size:22px}
.contact-card{background:#f0f5fb;border-radius:8px;padding:18px;margin:22px 0;line-height:2}
.contact-card b{color:#e60012;font-size:18px}
.rel-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:12px}

/* 表单 */
.form-box{background:#f7f9fb;border:1px solid #e3ebf3;border-radius:8px;padding:20px;max-width:520px}
.form-box label{display:block;font-size:14px;margin:10px 0 4px}
.form-box input,.form-box textarea{width:100%;padding:9px;border:1px solid #ccc;border-radius:5px;font-size:14px}
.form-box button{margin-top:14px;background:#e60012;color:#fff;border:0;padding:10px 28px;border-radius:5px;font-size:15px;cursor:pointer}

.faq-item{border-bottom:1px solid #eee;padding:14px 0}
.faq-item h3{font-size:15px;color:#134a86;cursor:pointer}
.faq-item .a{display:none;margin-top:8px;color:#555;font-size:14px}
.faq-item.open .a{display:block}

@media(max-width:768px){
  .grid-product,.grid-case{grid-template-columns:repeat(2,1fr)}
  .grid-art{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .grid4{grid-template-columns:repeat(2,1fr)}
  .banner-text h2{font-size:22px}
  .nav .wrap{overflow-x:auto}
  .nav a{padding:12px 14px;font-size:14px;white-space:nowrap}
  .pcard .img{height:130px}
  .ccard img{height:120px}
  .dgallery{grid-template-columns:2fr}
  .rel-list{grid-template-columns:repeat(2,1fr)}
}