:root{--brand:#DD0D0D;--brand-hi:#FF0404;--brand-deep:#B00A0A;--ink:#2D3748;--ink-strong:#1A202C;
--muted:#4A5568;--muted-2:#718096;--line:#E2E8F0;--bg:#F7FAFC;--panel:#EDF2F7;--white:#fff;--black:#000;
--radius:3px;--maxw:1240px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Open Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
font-size:17px;line-height:1.65;color:var(--ink);background:var(--bg)}
a{color:var(--brand-hi);text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{color:var(--ink-strong)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.btn{display:inline-block;background:var(--brand);color:#fff !important;padding:11px 24px;border-radius:var(--radius);
font-weight:600;font-size:16px;transition:.15s}
.btn:hover{background:var(--brand-deep)}
.btn-lg{padding:14px 32px;font-size:17px}
/* ── header: 红顶栏(43px) + 黑导航(71px) ── */
.topbar{background:var(--brand)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:43px;gap:16px}
.brand{display:flex;align-items:center;gap:9px;color:#fff;font-weight:800;font-size:19px;letter-spacing:.3px;white-space:nowrap}
.brand img{height:24px;width:auto;background:#fff;border-radius:3px;padding:2px 5px}
.tagline{color:rgba(255,255,255,.95);font-size:14px;text-align:center;flex:1;margin:0}
.topbar .social{display:flex;gap:6px;align-items:center}
.topbar .social a{color:#fff;display:flex;align-items:center;justify-content:center;opacity:.92}
.topbar .social a:hover{opacity:1}
.topbar .social svg{width:17px;height:17px}
.navbar{background:var(--black)}
.navbar .wrap{display:flex;align-items:center;justify-content:center;height:71px;position:relative}
.navbar nav{display:flex;align-items:stretch;height:71px}
.navbar nav a{color:#fff;font-size:18px;display:flex;align-items:center;padding:0 26px}
.navbar nav a:hover,.navbar nav a.on{background:var(--brand)}
.navbar .inquiry{position:absolute;right:22px;background:var(--brand);color:#fff;font-weight:600;padding:9px 20px;
border-radius:var(--radius)}
.navbar .inquiry:hover{background:var(--brand-deep)}
@media(max-width:1040px){.tagline{display:none}.navbar nav a{padding:0 12px;font-size:15px}
.navbar .inquiry{position:static;margin-left:12px;padding:8px 14px}}
/* ── hero ── */
.hero{background:#0d0d0f;color:#fff}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;padding:58px 22px}
.hero h1{color:#fff;font-size:46px;line-height:1.08;margin:0 0 16px;text-transform:uppercase;letter-spacing:.5px}
.hero p{color:rgba(255,255,255,.85);font-size:17px;margin:0 0 26px;max-width:580px}
.hero .shot{background:#fff;border-radius:6px;padding:18px}
.hero .shot img{margin:0 auto;max-height:300px;width:auto}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr;padding:36px 22px}.hero h1{font-size:31px}}
/* ── section title (红色居中大写 + 下划线) ── */
.sec{padding:48px 0}
.sec.white{background:#fff}
.sec-title{color:var(--brand-hi);text-align:center;font-size:36px;font-weight:700;text-transform:uppercase;
letter-spacing:1px;margin:0 0 8px}
.sec-title::after{content:"";display:block;width:60px;height:3px;background:var(--brand);margin:14px auto 0}
.sec-sub{text-align:center;color:var(--muted-2);margin:14px auto 32px;max-width:780px}
/* ── grids ── */
.grid{display:grid;gap:22px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media(max-width:1000px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.g4,.g3,.g2{grid-template-columns:1fr}}
.ccard{background:#fff;border:1px solid var(--line);border-radius:5px;overflow:hidden;text-align:center;
transition:.15s;display:block}
.ccard:hover{box-shadow:0 10px 26px rgba(0,0,0,.09);transform:translateY(-2px)}
.ccard .ph{height:180px;background:var(--panel);display:flex;align-items:center;justify-content:center;overflow:hidden}
.ccard .ph img{width:100%;height:100%;object-fit:cover}
.ccard .bd{padding:18px 14px}
.ccard h3{margin:0 0 4px;font-size:17px}
.ccard span{color:var(--muted-2);font-size:14px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:5px;padding:16px;text-align:center;display:block;transition:.15s}
.pcard:hover{box-shadow:0 10px 26px rgba(0,0,0,.09)}
.pcard .ph{height:190px;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.pcard .ph img{max-height:180px;width:auto;margin:0 auto}
.pcard h3{margin:0 0 4px;font-size:16px}
.pcard span{color:var(--muted-2);font-size:13.5px}
.ph-empty{color:var(--muted-2);font-size:13px;text-align:center;padding:16px}
/* ── about ── */
.about{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}
@media(max-width:860px){.about{grid-template-columns:1fr}}
.about img{border-radius:6px;width:100%}
/* ── stats ── */
.stats{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats .grid{text-align:center}
.stat b{display:block;color:var(--brand-hi);font-size:40px;font-weight:800;line-height:1;margin-bottom:6px}
.stat span{color:var(--muted);font-size:15px}
/* ── blogs / videos ── */
.bcard{background:#fff;border:1px solid var(--line);border-radius:5px;overflow:hidden}
.bcard .ph{height:170px;background:var(--panel)}
.bcard .bd{padding:16px}
.bcard h3{margin:0 0 8px;font-size:17px}
.videos{background:#0d0d0f;color:#fff}
.videos .sec-title{color:#fff}
.videos .sec-title::after{background:var(--brand)}
.video-ph{background:#1a1a1d;border-radius:6px;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;
color:#5c5f66;font-size:14px;border:1px solid #262629}
/* ── breadcrumb + category page ── */
.crumbs{padding:16px 0;font-size:13.5px;color:var(--muted-2)}
.crumbs a{color:var(--muted-2)}
.crumbs a:hover{color:var(--brand-hi)}
.cathead{text-align:center;padding:4px 0 26px}
.cathead h1{color:var(--brand-hi);font-size:40px;font-weight:700;margin:0 0 12px;text-transform:uppercase}
.cathead p{color:var(--muted);max-width:840px;margin:0 auto}
.shopbar{display:flex;align-items:center;justify-content:space-between;gap:14px;background:#fff;border:1px solid var(--line);
border-radius:5px;padding:12px 16px;margin:0 0 26px;flex-wrap:wrap}
.shopbar .q{flex:1;min-width:220px;border:1px solid var(--line);border-radius:3px;padding:9px 12px;font:inherit;font-size:15px}
.shopbar .meta{color:var(--muted-2);font-size:14px}
.layout{display:grid;grid-template-columns:265px 1fr;gap:30px;align-items:start}
@media(max-width:900px){.layout{grid-template-columns:1fr}}
.side{background:#fff;border:1px solid var(--line);border-radius:5px;overflow:hidden;margin-bottom:22px}
.side h3{margin:0;background:var(--black);color:#fff;font-size:15px;padding:12px 16px;text-transform:uppercase;letter-spacing:.5px}
.side ul{list-style:none;margin:0;padding:6px 0}
.side li a{display:block;padding:8px 16px;color:var(--ink);font-size:14.5px;border-bottom:1px solid #f1f4f8}
.side li a:hover{background:var(--panel);color:var(--brand-hi)}
.side li a.on{color:var(--brand-hi);font-weight:600}
.tags{display:flex;flex-wrap:wrap;gap:7px;padding:14px 16px}
.tags span{background:var(--panel);color:var(--muted);font-size:12.5px;padding:4px 9px;border-radius:3px}
/* ── product page ── */
.pdp{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start;padding:6px 0 10px}
@media(max-width:860px){.pdp{grid-template-columns:1fr}}
.pdp .gal{background:#fff;border:1px solid var(--line);border-radius:6px;padding:24px;text-align:center}
.pdp .gal img{margin:0 auto;max-width:100%;max-height:420px;width:auto;height:auto;object-fit:contain}
.pdp h1{font-size:32px;margin:0 0 8px;line-height:1.2}
.pdp .sub{color:var(--brand-hi);font-weight:600;margin:0 0 16px}
.spec{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);margin:0 0 8px}
.spec th,.spec td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);font-size:15px}
.spec th{color:var(--muted-2);font-weight:600;width:42%;background:var(--panel)}
.flist{background:#fff;border:1px solid var(--line);border-radius:5px;padding:20px 24px;margin:16px 0}
.flist h3{margin:0 0 10px}
.flist ul{margin:0;padding-left:20px}
.flist li{margin:5px 0;color:var(--muted)}
/* ── footer: 黑色多列 ── */
footer.site{background:var(--black);color:#c9ccd2;padding:48px 0 0;font-size:15px}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:32px;padding-bottom:36px}
@media(max-width:900px){footer.site .cols{grid-template-columns:1fr 1fr}}
@media(max-width:560px){footer.site .cols{grid-template-columns:1fr}}
footer.site .fbrand{color:#fff;font-weight:800;font-size:20px;margin:0 0 10px}
footer.site h4{color:#fff;font-size:16px;text-transform:uppercase;letter-spacing:.5px;margin:0 0 14px}
footer.site a{color:#c9ccd2;display:block;padding:4px 0;font-size:15px}
footer.site a:hover{color:var(--brand-hi)}
footer.site .fsocial{display:flex;gap:10px;margin-top:16px}
footer.site .fsocial a{width:38px;height:38px;border:1px solid #333;border-radius:4px;display:flex;align-items:center;
justify-content:center;padding:0}
footer.site .fsocial svg{width:19px;height:19px}
footer.site .bottom{border-top:1px solid #222;padding:16px 0;display:flex;justify-content:space-between;gap:14px;
font-size:13.5px;color:#8b8f96;flex-wrap:wrap}
footer.site .bottom a{display:inline;color:#8b8f96}
.note{font-size:13px;color:var(--muted-2)}
.padb{padding-bottom:20px}
/* ── 2026-09-21 patch: /zh/ 分类网格·卖点·FAQ 缺失的样式（仅追加，不改现有任何规则） ── */
.catgrid   { display:grid; gap:1rem; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); }
.points    { list-style:none; padding:0; margin:1.5rem 0; }
.points li { padding-left:1.5rem; position:relative; margin-bottom:0.5rem; }
.faq       { border-bottom:1px solid #ddd; padding:1rem 0; cursor:pointer; }
.faq.active{ font-weight:600; }