/* ============================================================
   义乌市广夏贸易商行官网 v2 · 共享样式
   多页结构：index / categories / advantages / contact
   本站不依赖 JavaScript —— 全部交互（导航、汉堡菜单、跳转）
   均为原生链接 + 纯 CSS 实现。
   ============================================================ */
:root{
  --blue:#1D4ED8;
  --blue-2:#2563EB;
  --blue-light:#DBEAFE;
  --blue-bg:#F0F5FF;
  --ink:#1E293B;
  --ink-2:#475569;
  --ink-3:#64748B;
  --line:#E2E8F0;
  --bg:#FFFFFF;
  --bg-2:#F7F9FC;
  --footer:#0F2A66;
  --radius:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:var(--blue);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* ---------- 顶部导航（纯 CSS，无 JS） ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav-inner{max-width:1120px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--ink)}
.brand-mark{width:34px;height:34px;flex:none}
.brand-mark svg{width:100%;height:100%}
.nav-toggle-checkbox{display:none}
.nav-toggle{display:none;cursor:pointer;padding:8px}
.nav-toggle svg{width:24px;height:24px;stroke:var(--ink)}
.nav-links{display:flex;gap:6px;list-style:none}
.nav-links a{
  display:block;padding:8px 14px;border-radius:8px;
  font-size:15px;color:var(--ink-2);transition:.2s;
}
.nav-links a:hover{color:var(--blue);background:var(--blue-bg)}
.nav-links a.active{color:var(--blue);background:var(--blue-light)}

/* ---------- 页面首屏（子页用） ---------- */
.page-hero{padding:130px 0 56px;background:var(--bg)}
.page-hero .sec-kicker{margin-bottom:10px}
.page-hero h1{font-size:clamp(26px,4vw,38px);font-weight:800}
.page-hero p{margin-top:12px;color:var(--ink-3);font-size:15.5px;max-width:640px}

/* ---------- 首页首屏 ---------- */
.hero{position:relative;padding:150px 0 90px;overflow:hidden;background:var(--bg)}
.hero-bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero-shape{position:absolute;border-radius:50%}
.hero-shape.s1{width:520px;height:520px;right:-160px;top:-180px;background:radial-gradient(circle at 30% 30%,#DBEAFE 0%,#EFF6FF 60%,transparent 75%)}
.hero-shape.s2{width:300px;height:300px;right:120px;bottom:-140px;background:radial-gradient(circle,#E0EDFF 0%,transparent 70%)}
.hero-shape.s3{width:220px;height:220px;left:-90px;top:120px;background:radial-gradient(circle,#E8F1FF 0%,transparent 70%)}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(var(--blue-light) 1px,transparent 1px),linear-gradient(90deg,var(--blue-light) 1px,transparent 1px);background-size:44px 44px;opacity:.35;mask-image:linear-gradient(200deg,transparent 40%,#000 90%);-webkit-mask-image:linear-gradient(200deg,transparent 40%,#000 90%)}
.hero-inner{position:relative;z-index:1}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--blue);background:var(--blue-bg);border:1px solid var(--blue-light);border-radius:999px;padding:5px 14px;margin-bottom:22px}
.hero-tag i{width:7px;height:7px;border-radius:50%;background:var(--blue);display:inline-block}
.hero h1{font-size:clamp(30px,5vw,52px);font-weight:800;letter-spacing:1px;line-height:1.25}
.hero h1 span{color:var(--blue)}
.hero-sub{margin-top:16px;font-size:clamp(15px,2vw,19px);color:var(--ink-2);max-width:620px}
.hero-cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:10px;font-size:16px;font-weight:600;transition:.2s;border:1px solid transparent}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(29,78,216,.25)}
.btn-primary:hover{background:var(--blue-2);transform:translateY(-2px)}
.btn-ghost{border-color:var(--blue-light);color:var(--blue);background:#fff}
.btn-ghost:hover{background:var(--blue-bg)}
.hero-pills{margin-top:42px;display:flex;flex-wrap:wrap;gap:10px}
.pill{font-size:13px;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 16px}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section.alt{background:var(--bg-2)}
.sec-head{text-align:center;max-width:640px;margin:0 auto 52px}
.sec-kicker{font-size:13px;letter-spacing:3px;color:var(--blue);font-weight:600;text-transform:uppercase}
.sec-head h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-top:10px}
.sec-head p{margin-top:12px;color:var(--ink-3);font-size:15px}

/* ---------- 公司简介 ---------- */
.about-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.about-text p{color:var(--ink-2);font-size:15.5px;margin-bottom:16px}
.about-text strong{color:var(--ink)}
.stat-row{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.stat{
  flex:1;min-width:130px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:22px 18px;text-align:center;
}
.stat b{display:block;font-size:26px;color:var(--blue);font-weight:800}
.stat span{font-size:13px;color:var(--ink-3)}
.about-visual{position:relative}
.about-card{
  background:linear-gradient(160deg,#EFF6FF,#FFFFFF 55%);
  border:1px solid var(--blue-light);border-radius:20px;
  padding:40px 34px;position:relative;overflow:hidden;
}
.about-card::after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,#DBEAFE,transparent 70%);right:-90px;bottom:-90px}
.about-card .icon-row{display:flex;gap:14px;margin-bottom:22px}
.about-card .icon-row span{width:46px;height:46px;border-radius:12px;background:#fff;border:1px solid var(--blue-light);display:flex;align-items:center;justify-content:center}
.about-card .icon-row svg{width:24px;height:24px}
.about-card h3{font-size:17px;font-weight:700;margin-bottom:8px;position:relative}
.about-card p{font-size:14px;color:var(--ink-3);position:relative}

/* ---------- 品类总览入口（首页） ---------- */
.overview-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.ov-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 20px;transition:.2s;color:var(--ink);
}
.ov-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(30,58,138,.08);border-color:var(--blue-light)}
.ov-card .oi{width:42px;height:42px;border-radius:11px;background:var(--blue-bg);display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.ov-card .oi svg{width:22px;height:22px}
.ov-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.ov-card p{font-size:12.5px;color:var(--ink-3);line-height:1.7}
.ov-card .more{margin-top:12px;font-size:13px;color:var(--blue);font-weight:600}

/* ---------- 经营品类（独立页） ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.cat-group{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;scroll-margin-top:88px}
.cat-group.g1{grid-column:span 3}
.cat-group.g2{grid-column:span 3}
.cat-group.g3{grid-column:span 2}
.cat-group.g4{grid-column:span 2}
.cat-group.g5{grid-column:span 2}
.cat-group-head{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.cat-group-head .gi{width:38px;height:38px;border-radius:10px;background:var(--blue-bg);display:flex;align-items:center;justify-content:center;flex:none}
.cat-group-head .gi svg{width:20px;height:20px}
.cat-group-head h3{font-size:16.5px;font-weight:700}
.cat-item{display:flex;gap:12px;padding:11px 0;border-top:1px dashed var(--line)}
.cat-item .ci{width:22px;height:22px;flex:none;margin-top:3px}
.cat-item .ci svg{width:22px;height:22px}
.cat-item b{display:block;font-size:14.5px;font-weight:600}
.cat-item span{display:block;font-size:12.5px;color:var(--ink-3);line-height:1.55}
.cat-note{margin-top:26px;text-align:center;font-size:13px;color:var(--ink-3)}

/* ---------- 我们的优势 ---------- */
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.adv-card{background:#fff;border:1px solid var(--line);border-top:3px solid var(--blue);border-radius:var(--radius);padding:30px 24px;transition:.2s}
.adv-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(30,58,138,.08)}
.adv-card .ai{width:46px;height:46px;border-radius:12px;background:var(--blue-bg);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.adv-card .ai svg{width:24px;height:24px}
.adv-card h3{font-size:16.5px;font-weight:700;margin-bottom:10px}
.adv-card p{font-size:13.5px;color:var(--ink-3)}

/* ---------- 合作流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;margin-top:10px}
.flow::before{content:"";position:absolute;top:27px;left:12%;right:12%;height:2px;background:var(--blue-light)}
.flow-step{position:relative;text-align:center;padding:0 16px}
.flow-dot{
  width:54px;height:54px;border-radius:50%;margin:0 auto 18px;
  background:#fff;border:2px solid var(--blue);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;
  position:relative;z-index:1;box-shadow:0 0 0 6px var(--bg-2);
}
.flow-step h3{font-size:16px;font-weight:700;margin-bottom:8px}
.flow-step p{font-size:13px;color:var(--ink-3);max-width:200px;margin:0 auto}
.flow-note{margin-top:44px;text-align:center}
.flow-note span{display:inline-block;font-size:13px;color:var(--ink-3);background:#fff;border:1px dashed var(--line);border-radius:999px;padding:8px 22px}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;max-width:760px;margin:0 auto}
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 28px;text-align:center;
}
.contact-card .ci{width:52px;height:52px;border-radius:14px;background:var(--blue-bg);display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.contact-card .ci svg{width:26px;height:26px}
.contact-card h3{font-size:14px;color:var(--ink-3);font-weight:500;margin-bottom:6px}
.contact-card .val{font-size:20px;font-weight:700;color:var(--ink)}
.contact-card a.val{color:var(--blue)}
.contact-card a.val:hover{text-decoration:underline}
.contact-card .val-sm{font-size:14.5px}
.placeholder{
  display:inline-block;font-size:14px;font-style:italic;color:var(--blue);
  border:1px dashed var(--blue-light);border-radius:6px;padding:3px 12px;background:var(--blue-bg);
}
.contact-cta{margin-top:44px;text-align:center}

/* ---------- 页脚（每页一致） ---------- */
.footer{background:var(--footer);color:#fff;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:56px;padding-bottom:48px}
.footer h2{font-size:22px;font-weight:800;margin-bottom:8px}
.footer .f-slogan{color:rgba(255,255,255,.65);font-size:14px;margin-bottom:24px}
.footer .btn-primary{box-shadow:none}
.contact-list{list-style:none}
.contact-list li{display:flex;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.contact-list .li{width:20px;height:20px;flex:none;margin-top:5px}
.contact-list .li svg{width:20px;height:20px}
.contact-list b{display:block;font-size:12.5px;color:rgba(255,255,255,.55);font-weight:500;margin-bottom:2px}
.contact-list .val{font-size:15px;color:#fff}
.contact-list a.val:hover{text-decoration:underline}
.contact-list .placeholder{color:var(--blue-light);border-color:rgba(219,234,254,.6);background:transparent;font-size:13.5px;padding:2px 10px}
.footer-base{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;text-align:center}
.copyright{font-size:13px;color:rgba(255,255,255,.6)}
.beian{margin-top:8px;font-size:12.5px}
.beian a{color:rgba(255,255,255,.6);margin:0 10px}
.beian a:hover{color:#fff}
.beian .police-badge{display:inline-block;width:14px;height:14px;vertical-align:-2px;margin-right:4px}

/* ---------- 移动端（纯 CSS 汉堡菜单：checkbox 方案） ---------- */
@media (max-width:900px){
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:64px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;padding:10px 16px 16px;gap:2px;
  }
  .nav-toggle-checkbox:checked ~ .nav-links{display:flex}
  .nav-links a{padding:12px 14px}
  .about-grid{grid-template-columns:1fr;gap:36px}
  .overview-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:1fr}
  .cat-group{grid-column:span 1 !important}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:1fr;gap:34px}
  .flow::before{display:none}
  .flow-step p{max-width:280px}
  .footer-grid{grid-template-columns:1fr;gap:40px}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .section{padding:64px 0}
  .page-hero{padding:112px 0 44px}
  .adv-grid,.overview-grid{grid-template-columns:1fr}
  .stat-row{gap:10px}
  .stat{min-width:100px;padding:16px 10px}
  .hero{padding:120px 0 64px}
  .hero-cta .btn{width:100%;justify-content:center}
}