/* ============================================================
   HUAFEI YIDA — shared design system for all sub-pages
   (mirrors the inline design tokens of /index.html — if the
   homepage tokens change, update this file to match)
   ============================================================ */
:root{--ink:#0f172a;--ink2:#1e293b;--body:#334155;--mut:#64748b;--line:#e2e8f0;--bg:#ffffff;--bg2:#f8fafc;--acc:#d00010;--acc2:#e63946;--ok:#16a34a;--wa:#25d366}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:Inter,"Segoe UI",system-ui,-apple-system,Arial,sans-serif;color:var(--body);background:var(--bg);line-height:1.65;font-size:16px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
h1,h2,h3{color:var(--ink);line-height:1.25}
h2{font-size:30px;margin-bottom:8px}
.kicker{color:var(--acc);font-weight:700;font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:8px}
.sub{color:var(--mut);max-width:680px;margin-bottom:36px}
section{padding:64px 0}
a{color:inherit;text-decoration:none}
.btn{display:inline-block;padding:13px 26px;border-radius:8px;font-weight:600;font-size:15px;transition:.2s;border:none;cursor:pointer;font-family:inherit}
.btn-acc{background:var(--acc);color:#fff}
.btn-acc:hover{background:#a3000d}
.btn-ghost{border:1.5px solid rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-dark{border:1.5px solid var(--ink);color:var(--ink);background:transparent}
.btn-dark:hover{background:var(--ink);color:#fff}

/* ---------- header ---------- */
header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;position:relative}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);font-size:19px;letter-spacing:.01em}
.logo svg{flex:none}
.logo small{display:block;font-size:10.5px;font-weight:600;color:var(--mut);letter-spacing:.08em}
.menu{display:flex;gap:24px;font-size:14.5px;font-weight:500;color:var(--ink2)}
.menu a:hover{color:var(--acc)}
.menu a.on{color:var(--acc);font-weight:700}
.navcta{display:flex;align-items:center;gap:14px}
.lang{font-size:13px;color:var(--mut);font-weight:600}
.lang b{color:var(--ink)}
.lang a:hover{color:var(--acc)}
.btn-wa{background:var(--wa);color:#fff;padding:9px 16px;border-radius:8px;font-weight:600;font-size:14px;display:flex;align-items:center;gap:7px}
.navtoggle{display:none}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:8px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.burger span{display:block;width:18px;height:2px;background:var(--ink);transition:.2s}

/* ---------- full hero (home pages) ---------- */
.hero{background:linear-gradient(135deg,#0f172a 0%,#1e293b 60%,#27303f 100%);color:#e2e8f0;padding:88px 0 72px;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;right:-140px;top:-140px;width:520px;height:520px;border-radius:50%;border:70px solid rgba(208,0,16,.16)}
.hero:after{content:"";position:absolute;right:-40px;top:60px;width:320px;height:320px;border-radius:50%;border:44px solid rgba(230,57,70,.10)}
.hero .wrap{position:relative;z-index:2}
.hero .tag{display:inline-block;background:rgba(208,0,16,.18);border:1px solid rgba(208,0,16,.45);color:#f4a3a8;font-size:13px;font-weight:600;padding:6px 14px;border-radius:99px;margin-bottom:22px}
.hero h1{color:#fff;font-size:44px;max-width:720px;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--acc2)}
.hero p.lead{font-size:18px;color:#cbd5e1;max-width:640px;margin-bottom:30px}
.hero .ctas{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.certline{display:flex;gap:10px;flex-wrap:wrap;align-items:center;font-size:13px;color:#94a3b8}
.certline span{border:1px solid #334155;border-radius:6px;padding:4px 10px;font-weight:600;color:#cbd5e1}

/* ---------- verify / split (home) ---------- */
.verify{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.chain{border:1px solid var(--line);border-radius:14px;padding:26px;background:var(--bg2)}
.chain .lvl{display:flex;align-items:center;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
.chain .lvl:last-child{border-bottom:none}
.chain .lvl b{color:var(--ink)}
.chain .lvl .dot{width:10px;height:10px;border-radius:50%;background:var(--acc);flex:none}
.vlist{list-style:none}
.vlist li{display:flex;gap:12px;margin-bottom:16px;font-size:15px}
.vlist svg{flex:none;margin-top:3px}
.vlist b{color:var(--ink)}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:40px}

/* ---------- page hero (sub-pages) ---------- */
.pagehero{background:linear-gradient(135deg,#0f172a 0%,#1e293b 60%,#27303f 100%);color:#e2e8f0;padding:52px 0 44px;position:relative;overflow:hidden}
.pagehero:before{content:"";position:absolute;right:-160px;top:-190px;width:460px;height:460px;border-radius:50%;border:60px solid rgba(208,0,16,.14)}
.pagehero .wrap{position:relative;z-index:2}
.pagehero h1{color:#fff;font-size:34px;max-width:760px;margin:10px 0 12px}
.pagehero h1 em{font-style:normal;color:var(--acc2)}
.pagehero p.lead{font-size:16.5px;color:#cbd5e1;max-width:700px;margin-bottom:20px}
.crumbs{font-size:13px;color:#94a3b8}
.crumbs a:hover{color:#f4a3a8}
.crumbs span{color:#cbd5e1}
.heroctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
.sizechips{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.sizechips i{font-style:normal;border:1px solid #334155;border-radius:6px;padding:4px 11px;font-weight:600;color:#cbd5e1;font-size:13px}

/* ---------- category sub-nav ---------- */
.subnav{background:var(--bg2);border-bottom:1px solid var(--line)}
.subnav-in{display:flex;gap:8px;overflow-x:auto;padding:12px 24px;-webkit-overflow-scrolling:touch}
.subnav-in a{flex:none;border:1px solid var(--line);background:#fff;border-radius:99px;padding:7px 15px;font-size:13.5px;font-weight:600;color:var(--ink2);transition:.15s}
.subnav-in a:hover{border-color:var(--acc);color:var(--acc)}
.subnav-in a.on{background:var(--ink);border-color:var(--ink);color:#fff}
.subnav-in a.finder{border-color:#f4a3a8;background:#fff5f5;color:#a3000d}

/* ---------- product cards (hub) ---------- */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.card{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;transition:.2s;display:flex;flex-direction:column}
.card:hover{box-shadow:0 10px 30px rgba(15,23,42,.08);transform:translateY(-2px)}
.ph{height:170px;display:flex;align-items:center;justify-content:center;color:#94a3b8;font-size:12.5px;font-weight:600;letter-spacing:.04em;background:repeating-linear-gradient(45deg,#eef2f7 0 14px,#e4e9f1 14px 28px);text-align:center;padding:0 14px}
.ph.dk{background:repeating-linear-gradient(45deg,#1e293b 0 14px,#243044 14px 28px);color:#7d8aa0}
.cardimg{height:170px;width:100%;object-fit:cover;object-position:left 62%;display:block;background:#fff;border-bottom:1px solid var(--line)}
.card .pad{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.card h3{font-size:18.5px;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--mut);margin-bottom:12px}
.specs{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}
.specs i{font-style:normal;background:var(--bg2);border:1px solid var(--line);color:var(--ink2);border-radius:6px;padding:3px 9px;font-size:12.5px;font-weight:600}
.card a.more{color:var(--acc);font-weight:600;font-size:14px;margin-top:auto}

/* ---------- pattern blocks (product detail) ---------- */
.pattern{border:1px solid var(--line);border-radius:16px;background:#fff;padding:30px;margin-bottom:26px;scroll-margin-top:86px}
.pattern-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.pattern-head h3{font-size:23px}
.badge{font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;border-radius:6px;padding:3px 10px;border:1px solid transparent}
.badge.green{background:#dcfce7;color:#166534;border-color:#bbf7d0}
.badge.red{background:#fee2e2;color:#991b1b;border-color:#fecaca}
.badge.amber{background:#ffe8e8;color:#92400e;border-color:#fde68a}
.badge.blue{background:#dbeafe;color:#1e40af;border-color:#bfdbfe}
.pattern .pos{font-size:13.5px;color:var(--mut);margin-bottom:16px}
.pattern-grid{display:grid;grid-template-columns:330px 1fr;gap:30px;align-items:start}
.pattern-media img{width:100%;border:1px solid var(--line);border-radius:10px;display:block}
.pattern-media .cap{font-size:12.5px;color:var(--mut);margin-top:8px;text-align:center}
.pattern-media .ph{height:300px;border-radius:10px}
.pattern-body>p{font-size:15px;margin-bottom:14px}
.feat{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:9px 18px;margin-bottom:18px}
.feat li{padding-left:24px;position:relative;font-size:14px;color:var(--body)}
.feat li:before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.feat b{color:var(--ink)}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;margin-bottom:8px}
.spectable{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
.spectable th{background:var(--ink);color:#fff;text-align:left;padding:9px 12px;font-weight:600;white-space:nowrap}
.spectable td{padding:9px 12px;border-top:1px solid var(--line);white-space:nowrap;color:var(--ink2)}
.spectable tr:nth-child(even) td{background:var(--bg2)}
.spectable td b{color:var(--ink)}
.spectable .rq{color:var(--acc);font-weight:600;font-size:12.5px}
.fine{font-size:12.5px;color:var(--mut);margin-bottom:16px}
.fine a{color:var(--acc);font-weight:600}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.cta-row .btn{padding:11px 22px;font-size:14px}

/* ---------- numbers strip ---------- */
.numbers{background:var(--ink);color:#fff;padding:30px 0;border-top:1px solid #1e293b}
.numgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:20px;text-align:center}
.numgrid b{display:block;font-size:27px;color:var(--acc2);letter-spacing:-.01em}
.numgrid span{font-size:12.5px;color:#94a3b8}

/* ---------- dark band ---------- */
.band{background:var(--ink);color:#fff;border-radius:18px;padding:40px;display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center}
.band h3{color:#fff;font-size:25px;margin-bottom:12px}
.band p{color:#cbd5e1;font-size:15.5px;margin-bottom:18px}
.band ul{list-style:none;margin-bottom:22px}
.band li{padding-left:26px;position:relative;margin-bottom:9px;font-size:15px;color:#e2e8f0}
.band li:before{content:"✓";position:absolute;left:0;color:var(--acc2);font-weight:800}

/* ---------- chips / markets ---------- */
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chips span{border:1px solid var(--line);background:#fff;border-radius:99px;padding:7px 15px;font-size:13.5px;font-weight:600;color:var(--ink2)}
.chips span.hot{border-color:#f4a3a8;background:#fff5f5;color:#a3000d}

/* ---------- faq ---------- */
.faq details{border-bottom:1px solid var(--line);padding:15px 0}
.faq summary{font-weight:600;color:var(--ink);cursor:pointer;font-size:15.5px}
.faq p{font-size:14.5px;color:var(--mut);margin-top:8px}

/* ---------- newsbox ---------- */
.newsbox{border:1.5px solid var(--acc);background:#fff5f5;border-radius:14px;padding:26px}
.newsbox .date{color:var(--acc);font-weight:700;font-size:13px;letter-spacing:.06em}
.newsbox h3{font-size:20px;margin:6px 0 10px}

/* ---------- contact / forms ---------- */
.contact{background:var(--ink);color:#fff}
.contact h2{color:#fff}
.contact .sub{color:#94a3b8}
.cgrid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.form input,.form textarea{width:100%;background:#1e293b;border:1px solid #334155;border-radius:8px;color:#fff;padding:12px 14px;font-size:14.5px;margin-bottom:12px;font-family:inherit}
.form ::placeholder{color:#64748b}
.form .hp{display:none}
.cinfo p{font-size:14.5px;color:#cbd5e1;margin-bottom:14px;display:flex;gap:10px}
.cinfo b{color:#fff}

/* ---------- footer ---------- */
footer{background:#0b1220;color:#7d8aa0;padding:44px 0 30px;font-size:13.5px}
footer .fnav{display:flex;gap:10px 22px;flex-wrap:wrap;margin-bottom:24px;font-weight:600}
footer .fnav a{color:#cbd5e1}
footer .fnav a:hover{color:#f4a3a8}
footer .seo{max-width:900px;margin-bottom:22px;line-height:1.8}
footer .cos{display:flex;gap:40px;flex-wrap:wrap;margin-bottom:22px}
footer .cos b{color:#cbd5e1;display:block;margin-bottom:4px}
footer .base{border-top:1px solid #1e293b;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
footer .base a:hover{color:#f4a3a8}

/* ---------- WhatsApp float ---------- */
.wafloat{position:fixed;right:26px;bottom:26px;width:58px;height:58px;border-radius:50%;background:var(--wa);display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(37,211,102,.4);z-index:99}

/* ---------- size finder ---------- */
.finderbox{border:1px solid var(--line);border-radius:16px;background:#fff;padding:26px;margin-bottom:26px}
.finder-controls{display:grid;grid-template-columns:1fr 220px;gap:12px;margin-bottom:14px}
.finder-controls input,.finder-controls select{border:1.5px solid var(--line);border-radius:10px;padding:13px 16px;font-size:16px;font-family:inherit;color:var(--ink);background:#fff;width:100%}
.finder-controls input:focus,.finder-controls select:focus{outline:none;border-color:var(--acc)}
.qchips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:4px}
.qchips button{border:1px solid var(--line);background:var(--bg2);border-radius:99px;padding:6px 14px;font-size:13px;font-weight:600;color:var(--ink2);cursor:pointer;font-family:inherit;transition:.15s}
.qchips button:hover{border-color:var(--acc);color:var(--acc)}
.count{font-size:13.5px;color:var(--mut);margin:14px 2px 10px}
.rescard{border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:12px;display:grid;grid-template-columns:auto 1fr auto;gap:16px;align-items:center;background:#fff}
.rescard:hover{border-color:#cbd5e1}
.rescard .sz{font-size:17px;font-weight:800;color:var(--ink);white-space:nowrap}
.rescard .sz small{display:block;font-size:11.5px;color:var(--mut);font-weight:600;letter-spacing:.04em}
.rescard .meta{font-size:13px;color:var(--mut);line-height:1.5}
.rescard .meta b{color:var(--ink2)}
.rescard .meta a{color:var(--acc);font-weight:600}
.rescard .act{display:flex;gap:8px;align-items:center}
.addbtn{border:1.5px solid var(--line);background:#fff;border-radius:8px;padding:8px 14px;font-size:13px;font-weight:600;color:var(--ink2);cursor:pointer;font-family:inherit}
.addbtn.added{background:#dcfce7;border-color:#86efac;color:#166534}
.selbar{position:fixed;left:0;right:0;bottom:0;background:var(--ink);color:#fff;padding:12px 0;z-index:98;box-shadow:0 -6px 20px rgba(15,23,42,.25);display:none}
.selbar.show{display:block}
.selbar .wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.selbar b{color:var(--acc2)}
.selbar .btn{padding:10px 20px;font-size:14px}
.noresult{border:1.5px dashed var(--line);border-radius:12px;padding:30px;text-align:center;color:var(--mut)}
.noresult a{color:var(--acc);font-weight:600}

/* ---------- responsive ---------- */
@media(max-width:860px){
  .menu{display:none;position:absolute;top:66px;left:-24px;right:-24px;background:#fff;flex-direction:column;gap:0;border-bottom:1px solid var(--line);box-shadow:0 14px 30px rgba(15,23,42,.12);padding:6px 0}
  .menu a{padding:13px 26px;border-top:1px solid var(--bg2)}
  .navtoggle:checked ~ .menu{display:flex}
  .burger{display:flex}
  .navtoggle:checked ~ .navcta .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .navtoggle:checked ~ .navcta .burger span:nth-child(2){opacity:0}
  .navtoggle:checked ~ .navcta .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .btn-wa{display:none}
  .pagehero h1{font-size:27px}
  .hero h1{font-size:32px}
  .verify,.split{grid-template-columns:1fr}
  section{padding:48px 0}
  .pattern{padding:22px 18px}
  .pattern-grid{grid-template-columns:1fr}
  .pattern-media{max-width:420px}
  .feat{grid-template-columns:1fr}
  .band,.cgrid{grid-template-columns:1fr}
  .finder-controls{grid-template-columns:1fr}
  .form input,.form textarea{font-size:16px}
  .rescard{grid-template-columns:1fr;gap:10px}
  .rescard .act{justify-content:flex-start}
}

/* ---------- brand logo image ---------- */
.logo .logoimg{height:38px;width:auto;display:block}
@media(max-width:860px){.logo .logoimg{height:32px}}