/* AB Toys — 前台样式 */
:root{
  --bg:#fff; --bg-soft:#FAFAF9; --bg-alt:#F4F4F2;
  --ink:#1A1A1A; --ink2:#6B6B6B; --ink3:#6B7280;
  --line:#EDEDED; --line2:#E5E7EB;
  --accent:#1F4E79; --accent-h:#2A6299; --accent-soft:#EAF1F8;
  --ok:#2F7D32; --err:#C62828;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --maxw:1240px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{overflow-x:hidden;font-family:var(--font);font-size:15px;line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;height:80px;min-width:0;flex-wrap:nowrap;position:relative}
.brand{display:flex;align-items:center;line-height:1.2;flex:none}
.brand-logo{display:block;height:60px;width:auto;flex:none}
.brand-name{font-size:19px;font-weight:700;letter-spacing:.5px}
.brand-sub{font-size:10.5px;color:var(--ink3);letter-spacing:.4px;text-transform:uppercase;max-width:120px;line-height:1.35}
.main-nav{display:flex;gap:22px;font-size:14px;color:#444;min-width:0;flex:1 1 auto;overflow-x:auto;scrollbar-width:none}
.main-nav::-webkit-scrollbar{display:none}
.main-nav a{white-space:nowrap;padding:6px 0;border-bottom:2px solid transparent}
.main-nav a:hover{color:var(--ink);border-color:var(--accent)}
.header-search{display:flex;margin-left:auto;gap:0;flex:none}
.header-search input{width:210px;height:36px;border:1px solid var(--line2);border-right:0;border-radius:4px 0 0 4px;padding:0 12px;font-size:13.5px}
.header-search input:focus{outline:none;border-color:var(--accent)}
.header-search button{height:36px;padding:0 16px;background:var(--accent);color:#fff;border:0;border-radius:0 4px 4px 0;font-size:13.5px;cursor:pointer}
.header-search button:hover{background:var(--accent-h)}

/* hero */
.hero{background:var(--bg-soft);border-bottom:1px solid var(--line);padding:72px 0 64px}
.hero h1{font-size:40px;line-height:1.2;font-weight:700;letter-spacing:-.6px;max-width:720px;margin-bottom:18px}
.hero-sub{font-size:16px;color:var(--ink2);max-width:640px;line-height:1.75}
.hero-stats{display:flex;gap:56px;margin-top:36px;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{font-size:30px;font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-1px}
.hero-stats span{font-size:12.5px;color:var(--ink3);margin-top:2px}

/* sections */
.section{padding:56px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:28px;gap:16px}
.section h2,.section-head h2{font-size:24px;font-weight:600;letter-spacing:-.3px}
.section-head .link{font-size:14px;color:var(--accent)}
.section-head .link:hover{text-decoration:underline}

/* categories */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px}
.category-card{display:flex;flex-direction:column;gap:4px;padding:20px 18px;border:1px solid var(--line2);border-radius:6px;background:#fff;transition:border-color .15s,background .15s}
.category-card:hover{border-color:var(--accent);background:var(--accent-soft)}
.category-name{font-size:15px;font-weight:600}
.category-count{font-size:12px;color:var(--ink3)}

/* product grid */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:28px 20px}
.product-card{background:#fff}
.product-thumb{display:flex;align-items:center;justify-content:center;aspect-ratio:1/1;background:var(--bg-soft);border:1px solid var(--line);overflow:hidden;transition:border-color .15s}
.product-card:hover .product-thumb{border-color:var(--accent)}
.product-thumb img{width:100%;height:100%;object-fit:contain;transition:transform .3s ease}
.product-card:hover .product-thumb img{transform:scale(1.03)}
.thumb-placeholder{display:flex;align-items:center;justify-content:center;width:100%;height:100%;color:var(--ink3);font-size:13px;font-variant-numeric:tabular-nums}
.product-info{padding:12px 2px 0}
.product-code{font-size:11.5px;color:var(--ink3);font-variant-numeric:tabular-nums;letter-spacing:.3px}
.product-name{font-size:14.5px;font-weight:500;line-height:1.45;margin-top:3px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.9em}
.product-name a:hover{color:var(--accent)}
.product-meta{display:flex;gap:12px;margin-top:6px;font-size:11.5px;color:var(--ink3);font-variant-numeric:tabular-nums}

/* page */
.page{padding:36px 0 72px}
.page.narrow{max-width:720px}
.page-title{font-size:30px;font-weight:700;letter-spacing:-.4px;margin-bottom:8px}
.page-sub{color:var(--ink2);margin-bottom:28px}
.breadcrumb{font-size:13px;color:var(--ink3);margin-bottom:20px;display:flex;gap:8px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--accent)}

/* filter chips */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
.chip{display:inline-flex;align-items:center;height:32px;padding:0 14px;border:1px solid var(--line2);border-radius:16px;font-size:13px;color:var(--ink2);background:#fff;transition:.15s}
.chip:hover{border-color:var(--accent);color:var(--accent)}
.chip.on{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);font-weight:500}

/* product detail */
.product-detail{display:grid;grid-template-columns:minmax(0,1fr) 460px;gap:56px;align-items:start}
.detail-gallery{position:sticky;top:96px}
.gallery-main{aspect-ratio:1/1;background:var(--bg-soft);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden}
.gallery-main img{width:100%;height:100%;object-fit:contain}
.gallery-thumbs{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin-top:10px}
.thumb-btn{aspect-ratio:1/1;background:var(--bg-soft);border:1px solid var(--line);cursor:pointer;padding:4px;overflow:hidden}
.thumb-btn.on{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.thumb-btn img{width:100%;height:100%;object-fit:contain}
.detail-code{font-size:12.5px;color:var(--ink3);font-variant-numeric:tabular-nums;letter-spacing:.5px;margin-bottom:10px}
.detail-title{font-size:28px;line-height:1.35;font-weight:700;letter-spacing:-.4px;margin-bottom:10px}
.detail-sub{color:var(--ink2);margin-bottom:16px}
.cert-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:26px}
.cert{border:1px solid var(--line2);border-radius:3px;padding:3px 9px;font-size:11.5px;color:var(--ink2);background:#fff}
.block-title{font-size:13px;font-weight:600;color:var(--ink2);text-transform:uppercase;letter-spacing:.6px;padding-bottom:8px;border-bottom:1px solid var(--line2);margin-bottom:14px}
.spec-table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:28px}
.spec-table th{text-align:left;font-weight:400;color:var(--ink2);padding:9px 0;border-bottom:1px solid var(--line);width:150px}
.spec-table td{padding:9px 0;border-bottom:1px solid var(--line);text-align:right;font-variant-numeric:tabular-nums;font-weight:500}

/* calculator */
.calculator{background:var(--bg-soft);border:1px solid var(--line);border-radius:6px;padding:18px;margin-bottom:24px}
.calc-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:14px;flex-wrap:wrap}
.calc-head .block-title{border:0;margin:0;padding:0}
.calc-hint{font-size:12px;color:var(--ink3)}
.calc-hint strong{color:var(--ink);font-variant-numeric:tabular-nums}
.calc-label{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink2);margin-bottom:16px}
.calc-label input{width:96px;height:38px;border:1px solid var(--line2);border-radius:4px;padding:0 10px;font-size:15px;font-weight:600;font-variant-numeric:tabular-nums;background:#fff}
.calc-results{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line2)}
.calc-results div{background:#fff;padding:12px 14px}
.calc-results span{display:block;font-size:11px;color:var(--ink3);margin-bottom:3px}
.calc-results strong{font-size:17px;font-weight:600;font-variant-numeric:tabular-nums}
.price-note{font-size:12.5px;color:var(--ink3);line-height:1.7;background:var(--bg-soft);border-left:2px solid var(--line2);padding:12px 14px;margin-bottom:22px}
.detail-actions{display:flex;gap:12px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;height:46px;padding:0 28px;border-radius:4px;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.15s}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-h)}
.btn-block{display:flex;width:100%}

/* inquiry form */
.inquiry-form{display:flex;flex-direction:column;gap:18px;max-width:640px}
.field{display:flex;flex-direction:column;gap:6px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field label{font-size:13px;color:var(--ink2);font-weight:500}
.req{color:var(--err)}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line2);border-radius:4px;padding:10px 12px;font-size:14.5px;background:#fff}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field textarea{resize:vertical}
.alert{padding:14px 16px;border-radius:4px;margin-bottom:24px;font-size:14px}
.alert-success{background:#EAF5EA;color:var(--ok);border:1px solid #C8E6C9}
.alert-error{background:#FDECEA;color:var(--err);border:1px solid #F5C6C2}
.alert ul{margin-left:18px}

/* contact & error */
.contact-block{list-style:none;font-size:15px;line-height:2;margin-bottom:28px}
.contact-block a{color:var(--accent)}
.error-page{text-align:center;padding:96px 0}
.error-code{font-size:72px;font-weight:700;color:var(--line2);line-height:1;margin-bottom:16px}
.error-page h1{font-size:26px;margin-bottom:12px}
.error-page p{color:var(--ink2);margin-bottom:28px}

/* pagination */
.pagination{display:flex;align-items:center;justify-content:center;gap:18px;margin-top:44px;font-size:14px}
.pagination a{color:var(--accent)}
.pagination a:hover{text-decoration:underline}
.pagination span{color:var(--ink3);font-size:13px}
.empty{text-align:center;color:var(--ink3);padding:56px 0;font-size:14px}

/* footer */
.site-footer{background:var(--bg-soft);border-top:1px solid var(--line);padding:56px 0 0;margin-top:56px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1.2fr;gap:48px;padding-bottom:40px}
.footer-logo{display:block;height:46px;width:auto;margin-bottom:14px}
.footer-about{font-size:13px;color:var(--ink2);line-height:1.8;max-width:380px}
.site-footer h4{font-size:13px;font-weight:600;margin-bottom:14px}
.site-footer ul{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--ink2)}
.site-footer a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--line2);padding:20px 24px 28px;font-size:12px;color:var(--ink3)}

/* responsive */
@media (max-width:1080px){
  .header-inner{gap:16px;height:auto;padding:14px 0;flex-wrap:wrap}
  .main-nav{order:3;width:100%;gap:16px;overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
  .main-nav::-webkit-scrollbar{height:0}
  .header-search{margin-left:auto}
  .product-detail{grid-template-columns:1fr;gap:32px}
  .detail-gallery{position:static}
  .hero h1{font-size:32px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .container{padding:0 16px}
  .hero{padding:44px 0 36px}
  .hero h1{font-size:26px}
  .hero-sub{font-size:15px}
  .hero-stats{gap:28px;margin-top:24px}
  .hero-stats strong{font-size:24px}
  .product-grid{grid-template-columns:repeat(2,1fr);gap:20px 12px}
  .product-name{font-size:13.5px}
  .product-meta{display:none}
  .header-search{width:100%;order:4}
  .brand-logo{height:42px}
  .brand-sub{display:none}
  .main-nav{gap:14px;font-size:13px}
  .main-nav a{white-space:nowrap}
  .header-search input{flex:1;width:auto}
  .detail-title{font-size:22px}
  .gallery-thumbs{grid-template-columns:repeat(4,1fr)}
  .calc-results{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .page-title{font-size:24px}
}

/* 后台入口：未登录时极低调，登录后显示为按钮 */
.admin-entry{
  font-size:11.5px; color:#C4C4C4; margin-left:14px; text-decoration:none;
  transition:color .15s; letter-spacing:1px;
}
.admin-entry:hover{ color:var(--accent); }
.admin-entry.is-authed{
  display:inline-flex; align-items:center; gap:5px;
  color:var(--accent); border:1px solid var(--accent);
  padding:3px 10px; border-radius:3px; font-size:11.5px;
  letter-spacing:0; background:#fff;
}
.admin-entry.is-authed:hover{ background:var(--accent); color:#fff; }


/* 表单校验提示（替代浏览器原生提示） */
.field-error{
  color:#C62828;
  font-size:12px;
  margin-top:4px;
  line-height:1.4;
}
.is-invalid{
  border-color:#C62828 !important;
  box-shadow:0 0 0 3px rgba(198,40,40,.10) !important;
}

/* ============================================================
   产品导航：宽幅 Mega Menu（悬停展开，分类网格铺开）
   ============================================================ */
.nav-dropdown{position:static}

.nav-dropdown-toggle{display:inline-flex;align-items:center;gap:5px}
.nav-caret{transition:transform .2s ease;flex:none;opacity:.6}
.nav-dropdown:hover .nav-caret{transform:rotate(180deg)}

/* 宽幅面板：贴住页头下沿，跨整个容器宽度 */
.nav-mega{
  position:absolute;
  top:100%;
  left:0;
  right:0;
  z-index:200;
  padding:34px 0 38px;
  background:#fff;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  box-shadow:0 12px 28px rgba(0,0,0,.07);
  opacity:0;
  visibility:hidden;
  transform:translateY(-6px);
  transition:opacity .18s ease, transform .18s ease, visibility .18s;
}
.nav-dropdown:hover .nav-mega,
.nav-dropdown:focus-within .nav-mega{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

/* 分类网格：参考图的多列布局 */
.nav-mega-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:8px 40px;
}
.nav-mega-grid a{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:12px;
  padding:9px 0;
  border-bottom:1px solid transparent;
  font-size:14px;
  color:var(--ink);
  transition:color .12s, border-color .12s;
}
.nav-mega-grid a:hover{
  color:var(--accent);
  border-bottom-color:var(--line);
}
.mega-count{
  flex:none;
  font-size:11.5px;
  color:var(--ink3);
  font-variant-numeric:tabular-nums;
}

/* 底部「查看全部产品」链接 */
.nav-mega-foot{
  margin-top:26px;
  padding-top:18px;
  border-top:1px solid var(--line);
}
.nav-mega-foot a{
  font-size:13.5px;
  font-weight:600;
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.nav-mega-foot a:hover{text-decoration:underline}

/* 只在桌面端启用悬停面板（窄屏改回普通链接）*/
@media (max-width:900px){
  .nav-mega{display:none}
  .nav-caret{display:none}
}
/* 公司法定名称 */
.contact-company{font-weight:600;color:var(--ink);margin-bottom:6px}
.contact-legal-name{font-size:16px;font-weight:600;color:var(--ink);margin:0 0 18px}