/* ============ 设计变量 ============ */
:root{
  --bg:#f6f8fb; --surface:#ffffff; --ink:#0f172a; --muted:#64748b;
  --primary:#1d4ed8; --primary-d:#1e40af; --primary-l:#eff4ff;
  --accent:#0ea5e9; --line:#e2e8f0; --ok:#16a34a; --err:#dc2626;
  --radius:14px; --shadow:0 6px 24px rgba(15,23,42,.08);
  --shadow-sm:0 2px 8px rgba(15,23,42,.06);
  --maxw:1180px; --header-h:68px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
/* 吸顶导航会盖住锚点目标，滚动时预留出导航高度 */
html{scroll-padding-top:calc(var(--header-h) + 16px)}
body{font-family:"Segoe UI",system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Nirmala UI","Noto Sans Devanagari","Noto Sans Thai","Noto Sans Arabic",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.25;font-weight:700}
.muted{color:var(--muted)}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  padding:.7rem 1.3rem;border-radius:10px;font-weight:600;font-size:.95rem;cursor:pointer;
  border:1.5px solid transparent;transition:.18s;background:var(--primary);color:#fff}
.btn:hover{background:var(--primary-d);transform:translateY(-1px)}
.btn-primary{background:var(--primary)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-l)}
.btn-ghost{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.28)}
.btn-sm{padding:.45rem .8rem;font-size:.85rem}
.btn-lg{padding:.85rem 1.8rem;font-size:1.02rem}
.btn-block{width:100%}
.btn-danger{background:var(--err);color:#fff}
.btn-danger:hover{background:#b91c1c}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);height:var(--header-h)}
.header-inner{height:var(--header-h);display:flex;align-items:center;gap:1.5rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.05rem}
.brand-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem}
.brand-name{white-space:nowrap;max-width:230px;overflow:hidden;text-overflow:ellipsis}
.main-nav{display:flex;gap:1.5rem;margin-inline-start:auto}
.main-nav a{font-weight:500;color:var(--muted);padding:.4rem 0;position:relative}
.main-nav a:hover,.main-nav a.active{color:var(--primary)}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--primary);border-radius:2px}
.header-actions{display:flex;align-items:center;gap:.8rem}
.lang-switch{position:relative}
.lang-btn{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:.45rem .7rem;cursor:pointer;font-size:.85rem;font-weight:600;color:var(--ink)}
.lang-menu{position:absolute;top:110%;right:0;background:#fff;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow);min-width:140px;overflow:hidden;display:none;z-index:60}
.lang-switch:hover .lang-menu{display:block}
.lang-menu li{list-style:none}
.lang-menu a{display:block;padding:.5rem .9rem;font-size:.9rem}
.lang-menu a:hover{background:var(--primary-l);color:var(--primary)}

/* 产品下拉菜单 */
.main-nav .nav-item{position:relative;display:flex;align-items:center}
.nav-item>a{padding:.4rem 0;font-weight:500}
.nav-link-with-sub{display:inline-flex;align-items:center;gap:.3rem;white-space:nowrap}
.nav-link-with-sub .caret{font-size:.65rem;transition:.2s}
.nav-submenu{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow);min-width:230px;padding:.35rem;display:none;z-index:60;margin-top:6px}
.nav-item:hover .nav-submenu,.nav-item:focus-within .nav-submenu,.nav-item.open .nav-submenu{display:block}
.nav-submenu li{list-style:none}
.nav-submenu a{display:block;padding:.55rem .8rem;font-size:.9rem;border-radius:7px;color:var(--ink);font-weight:500}
.nav-submenu a:hover{background:var(--primary-l);color:var(--primary)}
.nav-submenu .submenu-sep{height:1px;background:var(--line);margin:.3rem .4rem}
.nav-submenu .submenu-sep+li a{color:var(--muted);font-weight:600}

/* 分类入口大卡片 */
.cat-entry-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:2rem 1.6rem;box-shadow:var(--shadow-sm);transition:.2s;display:flex;flex-direction:column;
  align-items:flex-start;gap:.4rem}
.cat-entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--primary)}
.cat-entry-icon{font-size:2.2rem;line-height:1}
.cat-entry-card h3{font-size:1.2rem;margin-top:.4rem}
.cat-entry-card p{color:var(--muted);font-size:.82rem;text-transform:uppercase;letter-spacing:.6px}
.cat-entry-link{color:var(--primary);font-weight:700;margin-top:.7rem;font-size:.92rem}
.cat-entry-card:hover .cat-entry-link{text-decoration:underline}

/* 面包屑 */
.breadcrumb{display:flex;gap:.5rem;align-items:center;font-size:.88rem;color:var(--muted);padding-top:1.1rem;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:var(--ink);font-weight:600}
.breadcrumb span{color:#cbd5e1}

/* 分类空态 */
.cat-empty{max-width:620px;margin:1rem auto;text-align:center;background:var(--surface);
  border:1px dashed var(--line);border-radius:var(--radius);padding:3rem 2rem}
.cat-empty-icon{font-size:2.6rem;margin-bottom:.6rem}
.cat-empty h2{margin-bottom:.6rem}
.cat-empty p{color:var(--muted);margin-bottom:.6rem}
.cat-empty-hint{font-style:italic;opacity:.85}
.cat-empty .btn{margin-top:1rem}

/* ============ Hero ============ */
.hero{background:linear-gradient(135deg,#0f2a6b 0%,#1d4ed8 55%,#0ea5e9 100%);
  color:#fff;padding:5.5rem 0 6rem;text-align:center}
.hero h1{font-size:clamp(1.8rem,4vw,3rem);max-width:900px;margin:0 auto 1.1rem}
.hero-sub{font-size:1.08rem;opacity:.92;max-width:680px;margin:0 auto 2rem}
.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}

/* ============ 通用区块 ============ */
.section{padding:4rem 0}
.section-alt{background:var(--surface)}
.section-head{text-align:center;max-width:640px;margin:0 auto 2.5rem}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:.6rem}
.section-head p{color:var(--muted)}
.grid{display:grid;gap:1.5rem}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.center{text-align:center}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;box-shadow:var(--shadow-sm);transition:.2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card-icon{font-size:1.8rem;margin-bottom:.6rem}
.card h3{font-size:1.1rem;margin-bottom:.4rem}
.card p{color:var(--muted);font-size:.93rem}

/* CTA */
.cta{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;text-align:center;padding:4rem 0}
.cta h2{font-size:clamp(1.5rem,3vw,2.2rem);margin-bottom:.7rem}
.cta p{opacity:.9;margin-bottom:1.6rem}

/* ============ 产品卡片 ============ */
.product-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:.2s;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--primary)}
.product-thumb{aspect-ratio:4/3;background:#fff;
  display:flex;align-items:center;justify-content:center;overflow:hidden}
.product-thumb img{width:100%;height:100%;object-fit:contain;padding:6px}
.thumb-initials{font-size:2.4rem;font-weight:800;color:var(--primary);letter-spacing:1px}
.thumb-lg{font-size:4rem}
.product-body{padding:1.1rem 1.2rem 1.3rem}
.product-sku{font-size:.74rem;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.product-name{font-size:1.02rem;margin:.3rem 0 .7rem;min-height:2.4em}
.product-meta{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;color:var(--muted)}
.product-meta .price{color:var(--primary);font-weight:700;font-size:.95rem}

/* 页面小标题 */
.page-hero{background:linear-gradient(135deg,#0f2a6b,#1d4ed8);color:#fff;padding:3.2rem 0}
.page-hero h1{font-size:clamp(1.6rem,3vw,2.4rem)}
.page-hero p{opacity:.9;margin-top:.5rem}

/* 筛选 */
.filters{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:2rem}
.filter-group{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}
.filter-group label{font-weight:600;color:var(--muted)}
.chip{padding:.4rem .9rem;border:1px solid var(--line);border-radius:999px;font-size:.85rem;background:#fff;color:var(--muted);transition:.15s}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip-active{background:var(--primary);color:#fff;border-color:var(--primary)}
.search-box{display:flex;gap:.5rem}
.search-box input{padding:.5rem .9rem;border:1px solid var(--line);border-radius:9px;min-width:200px}
.empty{text-align:center;color:var(--muted);padding:3rem 0}

/* 产品详情 */
.back-link{display:inline-block;color:var(--primary);font-weight:600;margin-bottom:1.5rem}
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:start}
.product-detail-thumb{aspect-ratio:4/3;border-radius:var(--radius);background:linear-gradient(135deg,#eef2ff,#e0f2fe);
  display:flex;align-items:center;justify-content:center;overflow:hidden;border:1px solid var(--line)}
.product-detail-thumb img{width:100%;height:100%;object-fit:cover}
/* 详情页图库 */
.pd-gallery{flex-direction:column;align-items:stretch;justify-content:flex-start;aspect-ratio:auto;background:none;border:none;overflow:visible}
/* 白底 + contain：产品图完整显示不裁切（竖图/横图都保留原始比例） */
.pd-main{aspect-ratio:4/3;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  background:#fff}
.pd-main img{width:100%;height:100%;object-fit:contain;padding:8px;transition:opacity .2s}
.pd-thumbs{display:grid;grid-template-columns:repeat(5,1fr);gap:.5rem;margin-top:.6rem}
.pd-thumb{padding:0;border:2px solid var(--line);border-radius:8px;overflow:hidden;cursor:pointer;
  aspect-ratio:4/3;background:#fff;transition:border-color .15s}
.pd-thumb img{width:100%;height:100%;object-fit:contain;display:block;padding:3px}
.pd-thumb:hover{border-color:var(--primary-l)}
.pd-thumb.active{border-color:var(--primary)}
.product-detail-info h1{font-size:1.8rem;margin:.4rem 0 1rem}
.price-box{display:flex;gap:1rem;flex-wrap:wrap;align-items:center;margin-bottom:1.2rem}
.price-box .price{font-size:1.25rem;font-weight:700;color:var(--primary)}
.moq-badge{background:var(--primary-l);color:var(--primary-d);padding:.35rem .8rem;border-radius:8px;font-weight:600;font-size:.85rem}
.product-desc{color:var(--muted);margin-bottom:1.6rem;white-space:pre-line;line-height:1.75}
.product-desc b,.product-desc strong{color:var(--text,#222)}
.price-unit{color:var(--muted);font-size:.9rem}
/* 产品变体（多规格 SKU）选项 */
.pd-variants{margin:-0.4rem 0 1.2rem;display:flex;flex-direction:column;gap:.6rem}
.pd-variants-label{font-weight:600;font-size:.9rem;color:var(--muted)}
.pd-variant-list{display:flex;flex-wrap:wrap;gap:.5rem}
.pd-variant{border:1.5px solid var(--border,#e6ebf2);background:var(--bg-soft,#f7f9fc);color:var(--text,#222);
  padding:.5rem .95rem;border-radius:999px;font-size:.88rem;font-weight:600;cursor:pointer;
  transition:border-color .15s,background .15s,color .15s}
.pd-variant:hover{border-color:var(--primary)}
.pd-variant.active{border-color:var(--primary);background:var(--primary-l);color:var(--primary-d)}
/* 交易信息（交期/质保/贸易条款…） */
.trade-box{background:var(--bg-soft,#f7f9fc);border:1px solid var(--border,#e6ebf2);border-radius:12px;padding:1.2rem 1.4rem;margin-bottom:1.6rem}
.trade-box h3{font-size:1rem;margin-bottom:.8rem;color:var(--primary-d)}
.trade-box ul{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.7rem 1.5rem}
.trade-box li{display:flex;justify-content:space-between;gap:1rem;font-size:.92rem;border-bottom:1px dashed var(--border,#e6ebf2);padding-bottom:.4rem}
.trade-box li span{color:var(--muted)}
.trade-box li b{font-weight:600;text-align:right}
/* 询价引导：不展示价格时，把转化入口做重 */
.price-note{background:#fff8e6;border-left:3px solid #f0a500;color:#6b5200;padding:.7rem 1rem;border-radius:6px;font-size:.9rem;margin-bottom:1.2rem}
.pd-cta{display:flex;gap:.8rem;flex-wrap:wrap;margin-bottom:1.6rem}
.btn-whatsapp{background:#25d366;color:#fff;border:1px solid #25d366}
.btn-whatsapp:hover{background:#1eb757;border-color:#1eb757;color:#fff}
/* 右下角悬浮 WhatsApp */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:999;width:52px;height:52px;border-radius:50%;background:#25d366;color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(0,0,0,.22);transition:transform .18s ease}
.wa-float:hover{transform:scale(1.08);color:#fff}
@media(max-width:640px){.pd-cta .btn{flex:1 1 100%;text-align:center}.wa-float{right:14px;bottom:14px;width:48px;height:48px}}
/* 技术参数表 */
.specs-block{margin-top:3.5rem}
.specs-block h2{margin-bottom:1.5rem}
.spec-table{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.spec-table tr:nth-child(even){background:#f8fafc}
.spec-table th{width:38%;text-align:left;font-weight:600;color:var(--muted);padding:.7rem 1rem;
  border-bottom:1px solid var(--line);vertical-align:top}
.spec-table td{padding:.7rem 1rem;border-bottom:1px solid var(--line)}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:none}
@media(max-width:720px){.spec-table th{width:45%}}
[dir="rtl"] .spec-table th{text-align:right}
.related{margin-top:3.5rem}
.related h2{margin-bottom:1.5rem}

/* ============ 关于 ============ */
.about-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:2.5rem}
.about-grid .lead{font-size:1.05rem;color:var(--ink)}
.check-list{list-style:none;margin-top:1rem}
.check-list li{padding:.5rem 0 .5rem 1.8rem;position:relative;color:var(--muted)}
.check-list li::before{content:"✓";position:absolute;left:0;top:.5rem;color:var(--ok);font-weight:800}
.about-side{display:flex;flex-direction:column;gap:1.2rem}
.cert-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;box-shadow:var(--shadow-sm)}
.cert-box h3{margin-bottom:.8rem;font-size:1.05rem}
.cert-tags{display:flex;flex-wrap:wrap;gap:.5rem}
.cert-tag{background:var(--primary-l);color:var(--primary-d);padding:.35rem .8rem;border-radius:8px;font-size:.82rem;font-weight:600}
.info-list{list-style:none;display:flex;flex-direction:column;gap:.7rem;color:var(--muted);font-size:.92rem}
.info-list a{color:var(--primary)}

/* ============ 表单 ============ */
.form{display:flex;flex-direction:column;gap:1rem;max-width:640px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.form-group{display:flex;flex-direction:column;gap:.35rem}
.form-group label{font-weight:600;font-size:.9rem}
.form input,.form select,.form textarea{
  padding:.7rem .9rem;border:1.5px solid var(--line);border-radius:10px;font-size:.95rem;font-family:inherit;background:#fff;width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-l)}
.form textarea{resize:vertical}
.checkbox{display:flex;align-items:center;gap:.5rem;font-weight:600;font-size:.92rem;margin:.4rem 0}
.form-actions{display:flex;gap:1rem;margin-top:.5rem}

.contact-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:2.5rem}
.contact-form-wrap h2,.contact-info h3{margin-bottom:1.2rem}
.contact-info{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;height:fit-content;box-shadow:var(--shadow-sm)}

/* ============ 页脚 ============ */
.site-footer{background:#0f172a;color:#cbd5e1;padding:3rem 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.4fr 1fr;gap:2rem;padding-bottom:2.5rem}
.footer-grid h4{color:#fff;margin-bottom:1rem;font-size:1rem}
.footer-desc{margin-top:1rem;font-size:.9rem;opacity:.8;max-width:340px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:.55rem;font-size:.9rem}
.footer-links a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:1.2rem 0;font-size:.85rem;opacity:.7;text-align:center}

/* ============ 提示 ============ */
.alert{padding:.85rem 1.1rem;border-radius:10px;margin:.5rem 0 1rem;font-size:.92rem}
.alert-success{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}
.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}

/* ============ 后台 ============ */
.admin-body{background:#f1f5f9}
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#0f2a6b,#1d4ed8)}
.login-card{background:#fff;border-radius:18px;padding:2.5rem;width:min(400px,92vw);box-shadow:var(--shadow)}
.justify-center{justify-content:center}
.admin-shell{display:grid;grid-template-columns:240px 1fr;min-height:100vh}
.admin-sidebar{background:#0f172a;color:#cbd5e1;padding:1.5rem 1rem;display:flex;flex-direction:column}
.admin-sidebar .brand{color:#fff;margin-bottom:1.8rem}
.admin-nav{display:flex;flex-direction:column;gap:.3rem;flex:1}
.admin-nav a{padding:.7rem .9rem;border-radius:9px;color:#cbd5e1;font-weight:500;font-size:.93rem}
.admin-nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.admin-nav a.active{background:var(--primary);color:#fff}
.admin-foot{display:flex;flex-direction:column;gap:.3rem;border-top:1px solid rgba(255,255,255,.1);padding-top:1rem}
.admin-foot a{padding:.6rem .9rem;border-radius:9px;color:#cbd5e1;font-size:.9rem}
.admin-foot a:hover{background:rgba(255,255,255,.08);color:#fff}
.admin-main{display:flex;flex-direction:column}
.admin-topbar{background:#fff;border-bottom:1px solid var(--line);padding:1.1rem 2rem}
.admin-topbar h1{font-size:1.3rem}
.admin-content{padding:2rem;overflow:auto}
.admin-form{max-width:720px}
.toolbar{margin-bottom:1.2rem;display:flex;align-items:center;gap:.8rem;flex-wrap:wrap}
.quick-actions{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.5rem 0}

.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin-bottom:1.5rem}
.stat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem;text-align:center;box-shadow:var(--shadow-sm)}
.stat-num{font-size:2.4rem;font-weight:800;color:var(--primary)}
.stat-label{color:var(--muted);font-size:.9rem;margin-top:.2rem}

.data-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);font-size:.9rem}
.data-table th,.data-table td{padding:.75rem 1rem;text-align:left;border-bottom:1px solid var(--line)}
.data-table th{background:#f8fafc;font-weight:700;color:var(--muted);font-size:.82rem;text-transform:uppercase;letter-spacing:.4px}
.data-table tbody tr:hover{background:#f8fafc}
.row-new{background:#fffbeb}
.row-new:hover{background:#fef3c7!important}
.row-actions{display:flex;gap:.4rem;flex-wrap:wrap}
.status{display:inline-block;padding:.25rem .7rem;border-radius:999px;font-size:.78rem;font-weight:700}
.status-new{background:#fef3c7;color:#92400e}
.status-read{background:#dbeafe;color:#1e40af}
.status-replied{background:#dcfce7;color:#166534}
.detail-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.2rem;box-shadow:var(--shadow-sm)}
.detail-row{display:flex;gap:1rem;padding:.55rem 0;border-bottom:1px dashed var(--line)}
.detail-row:last-child{border-bottom:none}
.detail-row span{width:140px;color:var(--muted);font-weight:600;flex-shrink:0}
.msg-box{background:#f8fafc;border-radius:10px;padding:1rem;margin-top:.6rem;white-space:pre-wrap}
.lang-fieldset{border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem;margin:1rem 0}
.lang-fieldset legend{font-weight:700;padding:0 .5rem;color:var(--primary)}
.hint{color:var(--muted);font-size:.9rem;margin-top:1rem}

/* 后台分类层级 */
.data-table tr.cat-top td{background:#f8fafc;font-weight:600}
.data-table tr.cat-sub td{color:var(--muted);border-top:none}

/* ============ RTL ============ */
[dir="rtl"] .main-nav{margin-inline-start:0;margin-inline-end:auto}
[dir="rtl"] .lang-menu{right:auto;left:0}
[dir="rtl"] .nav-submenu{left:auto;right:0}
[dir="rtl"] .detail-row span{text-align:right}
[dir="rtl"] .product-meta{flex-direction:row-reverse}

/* ============ 响应式 ============ */
@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-2{grid-template-columns:repeat(2,1fr)}
  .about-grid,.contact-grid,.product-detail{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .stat-grid{grid-template-columns:1fr}
}
@media(max-width:720px){
  .main-nav{display:none}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .pd-thumbs{grid-template-columns:repeat(4,1fr)}
  .admin-shell{grid-template-columns:1fr}
  .admin-sidebar{flex-direction:row;flex-wrap:wrap;gap:.4rem;align-items:center}
  .admin-nav{flex-direction:row;flex-wrap:wrap}
  .admin-foot{flex-direction:row;border-top:none;padding-top:0}
  .footer-grid{grid-template-columns:1fr}
  .header-inner{gap:.8rem}
  .brand-name{display:none}
}

/* 首页工厂相册 */
.factory-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:1.2rem}
.factory-grid .factory-item{grid-column:span 2}
.factory-grid .factory-item--sq{grid-column:span 3}
.factory-grid .factory-item--sq img{aspect-ratio:1/1}
.factory-item{margin:0;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line,#e6ebf2);background:#fff}
.factory-item img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;transition:transform .35s}
.factory-item:hover img{transform:scale(1.04)}
.factory-item figcaption{padding:.7rem .9rem;font-size:.9rem;color:var(--muted);border-top:1px solid var(--line,#e6ebf2)}
@media (max-width:800px){.factory-grid{gap:.9rem}.factory-grid .factory-item,.factory-grid .factory-item--sq{grid-column:span 3}}
@media (max-width:520px){.factory-grid{grid-template-columns:1fr}.factory-grid .factory-item,.factory-grid .factory-item--sq{grid-column:auto}}

/* 首页验厂视频 */
.factory-video{display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);gap:2.2rem;align-items:center;margin-top:2.6rem;padding-top:2.4rem;border-top:1px solid var(--line,#e6ebf2)}
.fv-card{margin:0}
.fv-stage{position:relative;width:100%;aspect-ratio:16/9;border-radius:var(--radius);overflow:hidden;background:#0d1117;box-shadow:0 10px 30px rgba(16,24,40,.16)}
.fv-stage--vertical{aspect-ratio:9/16;max-height:560px;margin:0 auto;width:auto;max-width:100%}
.fv-poster,.fv-player,.fv-stage iframe{position:absolute;inset:0;width:100%;height:100%;border:0;display:block}
.fv-poster,.fv-player{object-fit:cover;background:#0d1117}
.fv-stage--vertical .fv-player{object-fit:contain}
/* 竖屏封面本身就是 9:16，用 contain 避免裁掉画面里的字幕 */
.fv-stage--vertical .fv-poster{object-fit:contain}
.fv-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:74px;height:74px;border-radius:50%;border:0;cursor:pointer;background:rgba(255,255,255,.94);color:#111827;font-size:1.7rem;line-height:1;display:grid;place-items:center;box-shadow:0 6px 22px rgba(0,0,0,.32);transition:transform .25s,background .25s}
.fv-play span{margin-left:4px}
.fv-play:hover{transform:translate(-50%,-50%) scale(1.08);background:#fff}
.fv-badge{position:absolute;right:.8rem;bottom:.8rem;padding:.32rem .7rem;border-radius:999px;background:rgba(17,24,39,.88);color:#fff;font-size:.74rem;font-weight:600;letter-spacing:.02em;backdrop-filter:blur(4px);box-shadow:0 2px 8px rgba(0,0,0,.28);z-index:2}
.fv-copy h3{margin:0 0 .6rem;font-size:1.5rem}
.fv-copy p{color:var(--muted);margin:0 0 1.1rem;line-height:1.7}
.fv-copy .check-list{margin:0 0 1.5rem}
@media (max-width:860px){
  .factory-video{grid-template-columns:1fr;gap:1.6rem}
  .fv-stage{aspect-ratio:16/9}
  /* 手机屏窄，竖屏视频限制高度，避免一张卡片占掉整屏 */
  .fv-stage--vertical{aspect-ratio:9/16;max-height:52vh;width:auto;margin:0 auto}
}