/* =========================================================
   凯信工业技术 · 网站 UI 原型设计系统
   品牌：凯信红 #8D111B / 凯信黑 #111827
   说明：本文件为 UI 设计稿共享样式，后续转 PHP 模板时复用。
   ========================================================= */

:root{
  /* 主色 */
  --red:#8D111B;
  --red-dark:#6B0A12;
  --red-light:#B91C1C;
  --navy:#111827;
  --navy-light:#1F2937;
  /* 中性 */
  --gray-bg:#F3F4F6;
  --gray-line:#E5E7EB;
  --text:#374151;
  --text-light:#6B7280;
  --white:#FFFFFF;
  /* 功能 */
  --radius:10px;
  --radius-sm:6px;
  --shadow:0 2px 10px rgba(17,24,39,.06);
  --shadow-hover:0 12px 30px rgba(141,17,27,.14);
  --maxw:1200px;
  --header-h:72px;
  --font:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--white);
  line-height:1.7;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section.alt{background:var(--gray-bg)}
.section-title{
  font-size:30px;font-weight:700;color:var(--navy);
  text-align:center;margin-bottom:10px;letter-spacing:1px;
}
.section-title .accent{color:var(--red)}
.section-sub{
  text-align:center;color:var(--text-light);
  max-width:680px;margin:0 auto 46px;font-size:15px;
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:36px;gap:16px;flex-wrap:wrap}
.section-head h2{font-size:26px;font-weight:700;color:var(--navy)}
.section-head h2::before{content:"";display:inline-block;width:5px;height:22px;background:var(--red);margin-right:12px;vertical-align:-3px;border-radius:2px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;
  cursor:pointer;border:1.5px solid transparent;transition:.2s;white-space:nowrap;
}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-dark);box-shadow:var(--shadow-hover);transform:translateY(-1px)}
.btn-outline{border-color:var(--red);color:var(--red);background:transparent}
.btn-outline:hover{background:var(--red);color:#fff}
.btn-ghost{background:rgba(255,255,255,.15);color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.28)}
.btn-sm{padding:8px 16px;font-size:13px}

/* ---------- 顶部导航 ---------- */
.header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--gray-line);
  height:var(--header-h);
}
.header .inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:19px;letter-spacing:.5px}
.logo img{height:38px;width:auto}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--text-light);letter-spacing:2px}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:10px 16px;font-size:15px;color:var(--navy);font-weight:500;border-radius:var(--radius-sm);transition:.2s;position:relative}
.nav a:hover,.nav a.active{color:var(--red)}
.nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:var(--red);border-radius:2px}
.header-cta{display:flex;align-items:center;gap:14px}
.phone{font-weight:700;color:var(--red);font-size:15px;display:flex;align-items:center;gap:6px}
.menu-toggle{display:none;font-size:24px;cursor:pointer;color:var(--navy)}

/* ---------- Hero ---------- */
.hero{position:relative;height:560px;overflow:hidden;color:#fff}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transition:opacity .8s;display:flex;align-items:center;pointer-events:none}
.hero-slide.active{opacity:1}
.hero-link{position:absolute;inset:0;z-index:1}
.hero-slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(17,24,39,.86) 0%,rgba(17,24,39,.55) 45%,rgba(17,24,39,.2) 100%)}
.hero-content{position:relative;z-index:2;max-width:var(--maxw);margin:0 auto;padding:0 20px;width:100%}
.hero-tag{display:inline-block;background:var(--red);padding:5px 14px;border-radius:30px;font-size:13px;font-weight:600;letter-spacing:1px;margin-bottom:18px}
.hero h1{font-size:46px;font-weight:800;line-height:1.2;margin-bottom:18px;text-shadow:0 2px 12px rgba(0,0,0,.3)}
.hero h1 .hl{color:#FCA5A5}
.hero p{font-size:18px;max-width:560px;color:#E5E7EB;margin-bottom:30px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-dots{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);z-index:3;display:flex;gap:10px}
.hero-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.4);cursor:pointer;transition:.2s}
.hero-dots span.active{background:var(--red);width:28px;border-radius:6px}

/* ---------- 数据条 ---------- */
.stats{background:var(--navy);color:#fff}
.stats .container{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:40px 20px}
.stat{text-align:center}
.stat .num{font-size:38px;font-weight:800;color:#fff}
.stat .num .u{color:var(--red-light);font-size:20px;margin-left:4px}
.stat .label{color:#9CA3AF;font-size:14px;margin-top:6px}

/* ---------- 产品分类 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-card{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);padding:30px 26px;transition:.25s;position:relative;overflow:hidden}
.cat-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--red);transform:scaleY(0);transition:.25s;transform-origin:top}
.cat-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:transparent}
.cat-card:hover::before{transform:scaleY(1)}
.cat-card .ico{width:52px;height:52px;border-radius:12px;background:rgba(141,17,27,.08);color:var(--red);display:flex;align-items:center;justify-content:center;font-size:24px;font-weight:800;margin-bottom:16px}
.cat-card h3{font-size:18px;color:var(--navy);margin-bottom:8px}
.cat-card p{font-size:14px;color:var(--text-light);margin-bottom:14px}
.cat-card .more{color:var(--red);font-weight:600;font-size:14px}

/* ---------- 优势 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.adv-card{background:#fff;border-radius:var(--radius);padding:32px 24px;text-align:center;box-shadow:var(--shadow);transition:.25s}
.adv-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.adv-card .ic{font-size:34px;margin-bottom:14px}
.adv-card h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.adv-card p{font-size:14px;color:var(--text-light)}

/* ---------- 产品网格 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.prod-card{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.prod-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);border-color:transparent}
.prod-thumb{height:180px;background:linear-gradient(135deg,var(--navy) 0%,#0b1220 100%);background-size:cover;background-position:center;position:relative;display:flex;align-items:flex-end;justify-content:flex-start;color:#fff}
.prod-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;z-index:0}
.prod-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(17,24,39,0) 40%,rgba(17,24,39,.75) 100%)}
.prod-thumb .model{position:relative;z-index:2;font-size:16px;font-weight:800;letter-spacing:1px;padding:8px 12px;background:rgba(141,17,27,.85);border-top-right-radius:8px}
.prod-thumb .badge{position:absolute;top:12px;left:12px;background:var(--red);color:#fff;font-size:11px;padding:3px 9px;border-radius:20px}
.prod-body{padding:18px 18px 20px;display:flex;flex-direction:column;flex:1}
.prod-body h3{font-size:16px;color:var(--navy);margin-bottom:6px}
.prod-body .spec{font-size:13px;color:var(--text-light);margin-bottom:14px;flex:1}
.prod-body .price{font-weight:700;color:var(--red);font-size:15px;margin-bottom:12px}
.prod-body .btn{width:100%}

/* ---------- 应用领域 ---------- */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.app-card{position:relative;height:220px;border-radius:var(--radius);overflow:hidden;color:#fff;display:flex;align-items:flex-end}
.app-card .bg{position:absolute;inset:0;background-size:cover;background-position:center;transition:.4s}
.app-card:hover .bg{transform:scale(1.08)}
.app-card::after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(17,24,39,.9),rgba(17,24,39,.1))}
.app-card .txt{position:relative;z-index:2;padding:22px}
.app-card .txt h3{font-size:20px;margin-bottom:4px}
.app-card .txt p{font-size:13px;color:#D1D5DB}

/* ---------- 新闻 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.news-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.news-thumb{height:170px;background:linear-gradient(135deg,#1F2937,#111827);display:flex;align-items:center;justify-content:center;color:var(--red-light);font-size:13px;letter-spacing:2px;background-size:cover;background-position:center}
.news-body{padding:18px 20px}
.news-body .date{font-size:13px;color:var(--text-light);margin-bottom:8px}
.news-body h3{font-size:16px;color:var(--navy);line-height:1.5}
.news-body h3:hover{color:var(--red)}

/* 新闻列表页 */
.news-page-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-page-card{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:block}
.news-page-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.news-page-thumb{height:180px;background:linear-gradient(135deg,#1F2937,#111827);display:flex;align-items:center;justify-content:center;color:var(--red-light);font-size:13px;letter-spacing:2px;background-size:cover;background-position:center}
.news-page-body{padding:18px 20px}
.news-page-body .date{font-size:13px;color:var(--text-light);margin-bottom:8px}
.news-page-body h3{font-size:17px;color:var(--navy);line-height:1.5;margin-bottom:10px}
.news-page-body p{font-size:14px;color:var(--text-light);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 新闻详情页 */
.news-article{background:#fff;border-radius:var(--radius);padding:40px 48px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.news-article h1{font-size:30px;color:var(--navy);margin-bottom:12px;line-height:1.4}
.news-article .meta{font-size:14px;color:var(--text-light);margin-bottom:24px}
.news-article .cover{margin-bottom:28px;border-radius:var(--radius);overflow:hidden}
.news-article .cover img{width:100%;height:auto;display:block}
.news-article .news-content{font-size:16px;line-height:1.9;color:var(--text)}
.news-article .news-content p{margin-bottom:18px}
.news-article .news-content img{max-width:100%;height:auto;display:block;margin:18px 0;border-radius:var(--radius-sm)}
.news-article .news-content h2,.news-article .news-content h3{color:var(--navy);margin:28px 0 14px}
.news-article .news-content ul,.news-article .news-content ol{margin:14px 0 14px 24px}
.news-article .news-content li{margin-bottom:8px}
.cover-preview{margin-top:12px}
.cover-preview img{max-width:240px;max-height:160px;width:auto;height:auto;border-radius:var(--radius-sm);border:1px solid var(--gray-line);display:block}

/* ---------- 面包屑 ---------- */
.crumb{padding:18px 0;font-size:13px;color:var(--text-light);background:var(--gray-bg)}
.crumb a:hover{color:var(--red)}
.crumb span{margin:0 8px;color:var(--gray-line)}

/* ---------- 产品中心布局 ---------- */
.shop-layout{display:grid;grid-template-columns:260px 1fr;gap:30px;align-items:start}
.shop-side{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);padding:22px;position:sticky;top:92px}
.shop-side h4{font-size:15px;color:var(--navy);margin:0 0 14px;padding-bottom:10px;border-bottom:1px solid var(--gray-line)}
.shop-side ul li a{display:block;padding:9px 12px;border-radius:var(--radius-sm);font-size:14px;color:var(--text);transition:.2s}
.shop-side ul li a:hover,.shop-side ul li a.active{background:rgba(141,17,27,.07);color:var(--red);font-weight:600}
.shop-search{display:flex;margin-bottom:18px}
.shop-search input{flex:1;border:1px solid var(--gray-line);border-radius:var(--radius-sm) 0 0 var(--radius-sm);padding:10px 12px;font-size:14px;outline:none}
.shop-search input:focus{border-color:var(--red)}
.shop-search button{background:var(--red);color:#fff;border:none;padding:0 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;cursor:pointer;font-size:14px}
.shop-main-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;flex-wrap:wrap;gap:10px}
.shop-main-head .count{color:var(--text-light);font-size:14px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap}
.tag-row a{font-size:13px;padding:5px 14px;border:1px solid var(--gray-line);border-radius:20px;color:var(--text-light)}
.tag-row a.active,.tag-row a:hover{border-color:var(--red);color:var(--red);background:rgba(141,17,27,.05)}
.shop-main-subhead{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--gray-line);font-size:14px;color:var(--text-light)}
.per-page-form{display:flex;align-items:center;gap:6px}
.per-page-form select{padding:5px 10px;border:1px solid var(--gray-line);border-radius:var(--radius-sm);font-size:14px;outline:none;background:#fff}
.per-page-form select:focus{border-color:var(--red)}
.prod-pager{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:32px;flex-wrap:wrap}
.prod-pager a,.prod-pager span{display:inline-flex;align-items:center;justify-content:center;min-width:34px;height:34px;padding:0 10px;border-radius:var(--radius-sm);font-size:14px;background:#fff;border:1px solid var(--gray-line);color:var(--text);transition:.2s}
.prod-pager a:hover{border-color:var(--red);color:var(--red)}
.prod-pager span.active{background:var(--red);color:#fff;border-color:var(--red);font-weight:600}
.prod-pager span.dots{background:transparent;border:none;color:var(--text-light)}
.prod-pager a.prev,.prod-pager a.next{padding:0 14px}

/* ---------- 产品详情 ---------- */
.detail-layout{display:grid;grid-template-columns:460px 1fr;gap:40px;align-items:start}
.detail-gallery{position:sticky;top:92px}
.detail-main-img{height:380px;border-radius:var(--radius);background:linear-gradient(135deg,var(--navy),#0b1220);overflow:hidden;display:flex;align-items:center;justify-content:center;color:#fff;font-size:30px;font-weight:800}
.detail-main-img img{width:100%;height:100%;object-fit:cover;display:block}
.detail-thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:12px}
.detail-thumbs div{height:70px;border-radius:var(--radius-sm);background:#1F2937 center/cover no-repeat;border:2px solid transparent;cursor:pointer}
.detail-thumbs div.active{border-color:var(--red)}
.detail-info h1{font-size:28px;color:var(--navy);margin-bottom:10px}
.detail-info .sub{color:var(--text-light);margin-bottom:20px}
.detail-info .lead{background:var(--gray-bg);border-left:4px solid var(--red);padding:16px 18px;border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin-bottom:24px;font-size:14px}
.spec-table{width:100%;border-collapse:collapse;margin-bottom:26px}
.spec-table th,.spec-table td{border:1px solid var(--gray-line);padding:11px 14px;font-size:14px;text-align:left}
.spec-table th{background:var(--gray-bg);color:var(--navy);width:30%;font-weight:600}
.spec-table td{color:var(--text)}
.detail-actions{display:flex;gap:14px;margin:8px 0 26px;flex-wrap:wrap}
.detail-desc h3{font-size:18px;color:var(--navy);margin:24px 0 12px}
.detail-desc p{margin-bottom:12px;color:var(--text)}
.detail-desc ul li{position:relative;padding-left:18px;margin-bottom:8px}
.detail-desc ul li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;background:var(--red);border-radius:50%}

/* 产品详情长图（位于参数与相关推荐之间） */
.detail-long-images{margin-top:48px}
.detail-long-images .section-subtitle{font-size:20px;color:var(--navy);margin-bottom:20px;font-weight:700}
.long-img-wrap{margin-bottom:24px;border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.long-img-wrap img{width:100%;height:auto;display:block}

/* 富文本详情内容 */
.detail-content-html{background:#fff;border-radius:var(--radius);padding:28px 32px;box-shadow:0 4px 20px rgba(0,0,0,.06);font-size:15px;line-height:1.8;color:var(--text)}
.detail-content-html p{margin-bottom:14px}
.detail-content-html img{max-width:100%;height:auto;display:block;margin:16px 0;border-radius:var(--radius-sm)}
.detail-content-html h1,.detail-content-html h2,.detail-content-html h3,.detail-content-html h4{color:var(--navy);margin:24px 0 12px}
.detail-content-html ul,.detail-content-html ol{margin:12px 0 12px 20px}
.detail-content-html li{margin-bottom:8px}
.detail-content-html table{width:100%;border-collapse:collapse;margin:16px 0}
.detail-content-html th,.detail-content-html td{border:1px solid var(--gray-line);padding:10px 12px;text-align:left}
.detail-content-html th{background:var(--gray-bg);color:var(--navy);font-weight:600}

/* ---------- 关于我们 ---------- */
.about-hero{background:var(--navy);color:#fff;padding:64px 0}
.about-hero h1{font-size:34px;font-weight:800;margin-bottom:14px}
.about-hero p{max-width:760px;color:#D1D5DB;font-size:16px}
.about-block{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;margin-bottom:60px}
.about-block.rev{direction:rtl}
.about-block.rev>*{direction:ltr}
.about-block .pic{height:320px;border-radius:var(--radius);overflow:hidden;background:linear-gradient(135deg,#1F2937,#0b1220);display:flex;align-items:center;justify-content:center;color:var(--red-light);font-size:14px;letter-spacing:2px}
.about-block .pic img{width:100%;height:100%;object-fit:cover}
.about-block h2{font-size:26px;color:var(--navy);margin-bottom:16px}
.about-block p{margin-bottom:14px;color:var(--text)}
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cert-card{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.cert-card:hover{transform:translateY(-4px);box-shadow:0 10px 25px rgba(0,0,0,.08)}
.cert-img{height:220px;background:#f8fafc;display:flex;align-items:center;justify-content:center;padding:16px}
.cert-img img{max-height:100%;max-width:100%;object-fit:contain}
.cert-info{padding:14px 16px;display:flex;align-items:center;gap:10px;border-top:1px solid var(--gray-line)}
.cert-info .c-ic{font-size:24px;color:var(--red)}
.cert-info .c-name{font-weight:700;color:var(--navy);font-size:15px}
.cert{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);height:120px;display:flex;align-items:center;justify-content:center;color:var(--text-light);font-size:13px;flex-direction:column;gap:8px}
.cert .c-ic{font-size:28px;color:var(--red)}
.timeline{position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--gray-line)}
.timeline li{position:relative;margin-bottom:30px}
.timeline li::before{content:"";position:absolute;left:-30px;top:4px;width:16px;height:16px;border-radius:50%;background:var(--red);border:3px solid #fff;box-shadow:0 0 0 2px var(--red)}
.timeline .yr{font-weight:800;color:var(--red);font-size:16px}
.timeline .ev{color:var(--text)}

/* ---------- 联系我们 ---------- */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info{background:var(--navy);color:#fff;border-radius:var(--radius);padding:36px}
.contact-info h3{font-size:20px;margin-bottom:20px}
.contact-info .row{display:flex;gap:14px;margin-bottom:18px;align-items:flex-start}
.contact-info .row .ic{font-size:20px;color:var(--red-light);flex-shrink:0}
.contact-info .row .t{font-size:15px}
.contact-info .row .t b{display:block;font-size:13px;color:#9CA3AF;font-weight:500;margin-bottom:2px}
.map-box{height:240px;border-radius:var(--radius);background:linear-gradient(135deg,#1F2937,#0b1220);display:flex;align-items:center;justify-content:center;color:#9CA3AF;font-size:13px;margin-top:18px}
.form-box{background:#fff;border:1px solid var(--gray-line);border-radius:var(--radius);padding:32px}
.form-box h3{font-size:20px;color:var(--navy);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--navy);margin-bottom:6px;font-weight:500}
.field input,.field textarea,.field select{width:100%;border:1px solid var(--gray-line);border-radius:var(--radius-sm);padding:11px 13px;font-size:14px;font-family:var(--font);outline:none;transition:.2s}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--red)}
.field textarea{resize:vertical;min-height:110px}

/* ---------- Footer ---------- */
.footer{background:var(--navy);color:#D1D5DB;padding:56px 0 0}
.footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
.footer h4{color:#fff;font-size:16px;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer h4::after{content:"";position:absolute;left:0;bottom:0;width:32px;height:3px;background:var(--red);border-radius:2px}
.footer a{display:block;font-size:14px;color:#9CA3AF;margin-bottom:10px;transition:.2s}
.footer a:hover{color:var(--red-light)}
.footer .about p{font-size:14px;color:#9CA3AF;margin-bottom:14px}
.footer .qr{background:#fff;border-radius:8px;width:110px;height:110px;display:flex;align-items:center;justify-content:center;color:var(--navy);font-size:12px;text-align:center;margin-top:10px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:#6B7280}
.footer .brand-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer .brand-logo img{height:34px}

/* ---------- 响应式 ---------- */
@media(max-width:980px){
  .cat-grid,.adv-grid,.app-grid,.news-grid,.news-page-grid,.prod-grid,.cert-grid{grid-template-columns:repeat(2,1fr)}
  .stats .container{grid-template-columns:repeat(2,1fr)}
  .detail-layout,.about-block,.contact-layout,.shop-layout{grid-template-columns:1fr}
  .shop-side{position:static}
  .cert-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:680px){
  .nav,.header-cta .phone{display:none}
  .menu-toggle{display:block}
  .hero{height:480px}
  .hero h1{font-size:32px}
  .cat-grid,.adv-grid,.app-grid,.news-grid,.news-page-grid,.prod-grid{grid-template-columns:1fr}
  .stats .container{grid-template-columns:1fr 1fr}
  .section{padding:48px 0}
  .footer .cols{grid-template-columns:1fr 1fr}
}