/* ============================================
   外贸官网原型 · 共享样式
   纯静态演示，无框架依赖，可直接浏览器打开
   ============================================ */
:root{
  --brand:#1f6f5c;        /* 主色（可替换为品牌色） */
  --brand-dark:#144d40;
  --ink:#22282e;
  --muted:#6b7580;
  --line:#e5e9ee;
  --bg:#f6f8fa;
  --white:#fff;
  --radius:10px;
  --shadow:0 6px 20px rgba(20,40,60,.08);
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--white);line-height:1.6;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.btn{display:inline-block;padding:11px 22px;border-radius:6px;font-weight:600;cursor:pointer;border:0;font-size:15px;transition:.2s}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark)}
.btn-outline{background:transparent;color:var(--brand);border:1.5px solid var(--brand)}
.btn-outline:hover{background:var(--brand);color:#fff}
.section{padding:56px 0}
.section-title{font-size:26px;font-weight:700;text-align:center;margin-bottom:6px}
.section-sub{text-align:center;color:var(--muted);margin-bottom:36px}
.muted{color:var(--muted)}

/* ---------- 顶部信息栏 ---------- */
.topbar{background:var(--brand-dark);color:#dfeee9;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#dfeee9}
.topbar .lang {display: none;}
.topbar .lang a{padding:2px 8px;border-radius:4px}
.topbar .lang a.on{background:rgba(255,255,255,.18);color:#fff;font-weight:600}
.topbar .right{display:flex;gap:16px;align-items:center}

/* ---------- 主导航 ---------- */
.header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--brand-dark)}
.logo .mark{width:38px;height:38px;border-radius:8px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:18px}
.nav{display:flex;gap:26px}
.nav a{font-weight:600;color:#3a4550;padding:6px 0;position:relative}
.nav a.active,.nav a:hover{color:var(--brand)}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--brand)}
.nav-toggle{display:none;font-size:24px;background:none;border:0;cursor:pointer}

/* ---------- Hero / Banner ---------- */
.hero{background:linear-gradient(120deg,#0f3b33,#1f6f5c);color:#fff}
.hero .container{display:flex;align-items:center;gap:40px;min-height:420px}
.hero .txt{flex:1}
.hero h1{font-size:38px;line-height:1.2;margin-bottom:14px}
.hero p{opacity:.9;margin-bottom:24px;max-width:520px}
.hero .pic{flex:1;height:320px;border-radius:var(--radius);background:rgba(255,255,255,.12);display:grid;place-items:center;font-size:60px}
.hero .actions{display:flex;gap:12px}
.hero .btn-outline{color:#fff;border-color:#fff}
.hero .btn-outline:hover{background:#fff;color:var(--brand-dark)}

/* ---------- 分类快捷 ---------- */
.cats{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.cat{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:18px 10px;text-align:center;font-weight:600;color:#3a4550;transition:.2s}
.cat:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.cat .ic{font-size:26px;display:block;margin-bottom:6px}

/* ---------- 产品卡片网格 ---------- */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.2s}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}
.card .thumb{height:190px;background:#eef2f5;display:grid;place-items:center;color:#9aa6b2;font-size:14px;position:relative}
.card .badge{position:absolute;top:10px;left:10px;background:var(--brand);color:#fff;font-size:11px;padding:3px 8px;border-radius:20px;font-weight:600}
.card .body{padding:14px 16px 18px}
.card .name{font-size:15px;font-weight:600;line-height:1.4;height:44px;overflow:hidden}
.card .model{color:var(--muted);font-size:13px;margin:6px 0 12px}
.card .link{color:var(--brand);font-weight:700;font-size:14px}

/* ---------- 简介区块 ---------- */
.about-split{display:flex;gap:40px;align-items:center}
.about-split .pic{flex:1;height:280px;border-radius:var(--radius);background:linear-gradient(135deg,#dfeae6,#cdd9d3);display:grid;place-items:center;font-size:48px}
.about-split .txt{flex:1}
.about-split h2{font-size:26px;margin-bottom:14px}
.about-split ul{margin:16px 0;list-style:none}
.about-split li{padding-left:26px;position:relative;margin-bottom:8px;color:#3a4550}
.about-split li::before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:800}

/* ---------- 新闻 ---------- */
.news-list{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.news-item{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:#fff}
.news-item .date{color:var(--muted);font-size:13px;margin-bottom:8px}
.news-item h4{font-size:16px;margin-bottom:8px;line-height:1.4}
.news-item p{font-size:14px;color:var(--muted)}

/* ---------- CTA ---------- */
.cta{background:var(--brand);color:#fff;border-radius:var(--radius);padding:38px;text-align:center}
.cta h2{font-size:26px;margin-bottom:8px}
.cta p{opacity:.9;margin-bottom:20px}
.cta .btn{background:#fff;color:var(--brand-dark)}

/* ---------- 页脚 ---------- */
.footer{background:#1a2026;color:#aab4be;padding:48px 0 20px;margin-top:40px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px}
.footer h5{color:#fff;font-size:15px;margin-bottom:14px}
.footer a{color:#aab4be;display:block;margin-bottom:8px;font-size:14px}
.footer a:hover{color:#fff}
.footer .company{font-size:22px;font-weight:800;color:#fff;margin-bottom:12px}
.footer .copy{border-top:1px solid #2b333c;margin-top:30px;padding-top:18px;text-align:center;font-size:13px;color:#6b7580}

/* ---------- 悬浮工具 ---------- */
.float-tools{position:fixed;right:18px;bottom:24px;display:flex;flex-direction:column;gap:12px;z-index:60}
.float-tools a{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;color:#fff;font-size:22px;box-shadow:var(--shadow)}
.float-tools .wa{background:#25d366}
.float-tools .chat{background:var(--brand)}
.float-tools .top{background:#4a5560;font-size:18px}

/* ---------- 面包屑 ---------- */
.breadcrumb{background:var(--bg);border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.breadcrumb .container{padding-top:14px;padding-bottom:14px}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{margin:0 6px}

/* ---------- 产品详情 ---------- */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:40px;padding:40px 0}
.gallery .main{height:420px;border:1px solid var(--line);border-radius:var(--radius);background:#eef2f5;display:grid;place-items:center;color:#9aa6b2;margin-bottom:14px;font-size:60px}
.gallery .thumbs{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.gallery .thumbs .t{aspect-ratio:1;border:1px solid var(--line);border-radius:8px;background:#f2f5f8;display:grid;place-items:center;font-size:12px;color:#9aa6b2;cursor:pointer}
.gallery .thumbs .t.on{border-color:var(--brand)}
.dinfo h1{font-size:26px;line-height:1.3;margin-bottom:8px}
.dinfo .model{color:var(--muted);margin-bottom:18px}
.attr-table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px}
.attr-table th,.attr-table td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.attr-table th{background:var(--bg);width:38%;font-weight:600;color:#3a4550}
.dinfo .actions{display:flex;gap:12px;margin:22px 0}
.desc h2{font-size:20px;margin:26px 0 12px;padding-bottom:8px;border-bottom:2px solid var(--brand);display:inline-block}

/* ---------- 表单 ---------- */
.contact-split{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;padding:40px 0}
.info-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.info-card .row{display:flex;gap:12px;margin-bottom:18px;align-items:flex-start}
.info-card .ic{width:40px;height:40px;border-radius:8px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:18px;flex-shrink:0}
.form{border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.form h2{font-size:22px;margin-bottom:6px}
.form .tip{color:var(--muted);margin-bottom:20px;font-size:14px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}
.field .req{color:#e05a5a}
.field input,.field textarea{width:100%;padding:11px 13px;border:1px solid #cfd6dd;border-radius:6px;font-size:15px;font-family:inherit}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,111,92,.12)}
.field textarea{height:120px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.captcha{display:flex;gap:10px;align-items:center}
.captcha .cap-img{width:120px;height:44px;border-radius:6px;background:#e9edf1;display:grid;place-items:center;letter-spacing:3px;font-weight:700;color:#566;cursor:pointer}
.form .note{font-size:13px;color:var(--muted);margin-top:12px}

/* ---------- 相关/新品 侧栏 ---------- */
.with-side{display:grid;grid-template-columns:1fr 300px;gap:36px;padding:40px 0}
.side-box{border:1px solid var(--line);border-radius:var(--radius);padding:18px;background:#fff;height:fit-content}
.side-box h4{margin-bottom:14px;font-size:16px;border-left:4px solid var(--brand);padding-left:10px}
.side-list .item{display:flex;gap:10px;margin-bottom:14px}
.side-list .ph{width:64px;height:64px;border-radius:6px;background:#eef2f5;flex-shrink:0;display:grid;place-items:center;font-size:11px;color:#9aa6b2}
.side-list .nm{font-size:14px;line-height:1.35;font-weight:600}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .grid,.news-list{grid-template-columns:repeat(3,1fr)}
  .cats{grid-template-columns:repeat(3,1fr)}
  .detail,.contact-split,.with-side{grid-template-columns:1fr}
  .hero .container{flex-direction:column;text-align:center;padding:40px 0}
  .footer .cols{grid-template-columns:1fr 1fr}
  .about-split{flex-direction:column}
}
@media(max-width:600px){
  .nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 20px;border-bottom:1px solid var(--line);gap:14px}
  .nav.open{display:flex}
  .nav-toggle{display:block}
  .grid,.news-list{grid-template-columns:repeat(2,1fr)}
  .cats{grid-template-columns:repeat(2,1fr)}
  .field-row{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr}
  .topbar .right .tel{display:none}
}