:root{
  --teal:#0e7c6b;
  --teal-2:#16a085;
  --ink:#1a201d;
  --muted:#5b6b66;
  --line:#e4ebe8;
  --bg-alt:#f5f8f7;
  --radius:14px;
  --max:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  color:var(--ink);line-height:1.65;background:#fff;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;
}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
a{color:var(--teal);text-decoration:none}
a:hover{text-decoration:underline}

/* Header */
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.85);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;gap:14px}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;letter-spacing:.06em;color:var(--teal);font-size:20px;flex-shrink:0}
.brand-logo{height:46px;width:auto;display:block;flex-shrink:0}
.nav-right{display:flex;align-items:center;gap:18px}
.nav-links{display:flex;gap:16px}
.nav-links a{color:var(--ink);font-weight:600;font-size:14px}
.nav-links a:hover{color:var(--teal);text-decoration:none}

/* Language switch */
.lang-switch{display:flex;gap:6px;align-items:center;flex-shrink:0}
.lang-switch button{background:transparent;border:1px solid var(--line);color:var(--muted);padding:6px 12px;border-radius:999px;font-size:13px;font-weight:700;cursor:pointer;transition:.2s}
.lang-switch button:hover{border-color:var(--teal);color:var(--teal)}
.lang-switch button.active{background:var(--teal);color:#fff;border-color:var(--teal)}

/* Bilingual toggle */
html:not(.lang-zh) .zh{display:none !important}
html.lang-zh .en{display:none !important}

/* Hero — 原品牌青绿渐变（不使用自定义 banner 图） */
.hero{
  position:relative;
  background:linear-gradient(135deg,var(--teal),var(--teal-2));
  color:#fff;padding:96px 0 88px;text-align:center
}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:13px;opacity:.85;margin-bottom:14px}
.hero h1{font-size:clamp(28px,5vw,50px);line-height:1.18;font-weight:800;margin-bottom:18px}
.hero h1 span{display:inline}
.lead{max-width:680px;margin:0 auto 30px;font-size:18px;opacity:.95}
.cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s;cursor:pointer;border:none}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--teal)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.7)}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:var(--teal-2)}

/* Sections */
.section{padding:72px 0}
.section.alt{background:var(--bg-alt)}
h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:14px;position:relative;padding-bottom:12px}
h2::after{content:"";position:absolute;left:0;bottom:0;width:54px;height:4px;background:var(--teal);border-radius:2px}
.sub{color:var(--muted);font-size:16px;margin-bottom:8px}
.section p{max-width:760px;color:var(--muted);margin-bottom:14px;font-size:17px}
.section p strong{color:var(--ink)}
.note{font-size:13px;color:var(--muted);margin-top:14px}
.ph{display:inline-flex;align-items:center;gap:5px}

/* Product filter bar */
.filterbar{display:flex;gap:10px;flex-wrap:wrap;margin:4px 0 22px}
.chip{border:1px solid var(--line);background:#fff;color:var(--muted);padding:8px 16px;border-radius:999px;font-size:14px;font-weight:600;cursor:pointer;transition:.2s}
.chip:hover{border-color:var(--teal);color:var(--teal)}
.chip.active{background:var(--teal);color:#fff;border-color:var(--teal)}

/* Product showcase */
.showcase{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:18px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.pcard:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(14,124,107,.12);border-color:transparent}
.pthumb{height:150px;display:flex;align-items:center;justify-content:center;background:#fafcfb;border-bottom:1px solid var(--line);color:#9bb3ac;font-size:13px}
.pbody{padding:14px 16px;flex:1;display:flex;flex-direction:column;gap:6px}
.pbody h3{font-size:16px;color:var(--ink);margin:0}
.pbody p{font-size:13px;color:var(--muted);margin:0;flex:1}
.pbody a{font-size:13px;font-weight:700;color:var(--teal);margin-top:4px}

/* Testimonials */
.tgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:8px}
.tcard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.tcard .quote{font-size:16px;color:var(--ink);font-style:italic;margin-bottom:14px}
.tcard .who{font-size:14px;color:var(--muted);font-weight:600}

/* Certifications (image slots) */
.cgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-top:8px}
.ccard{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.cert-img{width:74px;height:56px;border:1px dashed #b9ccc6;border-radius:8px;display:flex;align-items:center;justify-content:center;background:#fafcfb;flex-shrink:0;color:#9bb3ac;font-size:11px;text-align:center}
.cert-name{font-size:14px;font-weight:600;color:var(--ink)}

/* Brand card */
.brand-card{background:#fff;border:1px solid var(--line);border-left:5px solid var(--teal);border-radius:var(--radius);padding:28px;max-width:760px}
.brand-card h3{color:var(--teal);font-size:22px;margin-bottom:8px}

/* Checklist */
.checklist{list-style:none;max-width:760px}
.checklist li{position:relative;padding-left:32px;margin-bottom:12px;font-size:17px;color:var(--muted)}
.checklist li::before{content:"✓";position:absolute;left:0;top:0;color:#fff;background:var(--teal);width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}

/* Contact */
.contact-list{list-style:none;max-width:560px}
.contact-list li{display:flex;gap:14px;padding:12px 0;border-bottom:1px solid var(--line);font-size:17px}
.contact-list .label{width:120px;color:var(--muted);font-weight:600;flex-shrink:0}
.media-row{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-top:20px}
.social{display:flex;gap:12px;flex-wrap:wrap}
.social a{width:46px;height:46px;border-radius:50%;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:22px;transition:.2s}
.social a:hover{background:var(--teal);border-color:var(--teal);text-decoration:none;transform:translateY(-2px)}
.qr-slot{width:92px;height:92px;border:1px dashed var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;color:#9bb3ac;font-size:11px;text-align:center;background:#fafcfb}

/* Footer */
.site-footer{background:#10211c;color:#cfe0db;padding:40px 0 26px}
.footer-grid{display:flex;flex-wrap:wrap;gap:32px;justify-content:space-between;align-items:flex-start}
.footer-brand{display:flex;gap:14px;align-items:center}
.logo-slot{height:42px;width:auto;display:block;filter:drop-shadow(0 1px 2px rgba(0,0,0,.3))}
.fb-name{font-weight:800;font-size:20px;color:#fff;letter-spacing:.04em}
.fb-tag{font-size:13px;color:#9fc0b6}
.footer-cats h4{font-size:13px;color:#fff;margin-bottom:10px;text-transform:uppercase;letter-spacing:.06em}
.footer-cats a{display:block;color:#9fc0b6;font-size:14px;padding:3px 0}
.footer-cats a:hover{color:#fff;text-decoration:none}
.footer-bottom{margin-top:26px;border-top:1px solid #21382f;padding-top:16px}
.footer-bottom p{margin:4px 0;font-size:13px}
.footer-bottom .muted{opacity:.6}

/* ---------- Featured product card (editorial) ---------- */
:root{ --accent2:#c2571f; --cream:#f6f3ed; --warm:#6b6157; }
.feat{background-color:var(--bg-alt);padding:84px 0}
.feat-card{background:#fff;border:1px solid #e8e2d8;padding:40px;max-width:640px;box-shadow:0 22px 55px rgba(70,52,34,.07)}
.feat-label{display:inline-block;color:var(--accent2);font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px}
.feat-title{font-family:Georgia,"Times New Roman","Songti SC",serif;font-size:clamp(28px,4vw,40px);font-weight:400;line-height:1.25;color:#26221e;margin-bottom:16px;padding-bottom:0}
.feat-title::after{display:none}
.feat-desc{color:var(--warm);font-size:16px;line-height:1.85;margin-bottom:26px;max-width:520px}
.feat-list{list-style:none;margin:0 0 26px}
.feat-list li{border-bottom:1px solid #efe9e0;padding:11px 0;color:#4a4239;font-size:15px}
.feat-list li:first-child{border-top:1px solid #efe9e0}
.feat-list li::before{content:"—";color:var(--accent2);margin-right:12px}
.feat-cta{display:inline-flex;align-items:center;gap:8px;color:var(--accent2);font-weight:700;font-size:15px}
.feat-cta:hover{text-decoration:none;gap:14px}

/* ---------- Inquiry form (with WhatsApp) ---------- */
.quote{background:#fff;padding:84px 0}
.quote-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start}
.quote h2{font-family:Georgia,"Times New Roman","Songti SC",serif;font-weight:400;font-size:clamp(26px,3.4vw,36px);color:#26221e}
.quote h2::after{background:var(--accent2)}
.qleft p{color:var(--warm);font-size:16px;line-height:1.8;max-width:430px;margin:0}
.qcontact{list-style:none;margin:26px 0 24px}
.qcontact li{display:flex;gap:14px;align-items:baseline;padding:9px 0;font-size:15px;color:#4a4239;border-bottom:1px solid #f0ebe3}
.qcontact .k{color:#9a9086;font-size:12px;letter-spacing:.1em;text-transform:uppercase;width:92px;flex-shrink:0}
.qform{background:#fff;border:1px solid #e8e2d8;padding:30px;box-shadow:0 22px 55px rgba(70,52,34,.06)}
.qfield{margin-bottom:17px}
.qfield label{display:block;font-size:13px;color:#7d746a;margin-bottom:7px}
.qfield .req{color:var(--accent2)}
.qfield input,.qfield select,.qfield textarea{width:100%;border:1px solid #e5ded3;border-radius:10px;padding:12px 14px;font-size:15px;color:#2a2622;background:#fff;font-family:inherit;transition:.18s}
.qfield textarea{min-height:118px;resize:vertical;line-height:1.6}
.qfield input:focus,.qfield select:focus,.qfield textarea:focus{outline:none;border-color:var(--accent2);box-shadow:0 0 0 3px rgba(194,87,31,.10)}
.qactions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.btn-black{background:#15130f;color:#fff;border-radius:999px;padding:14px 30px;font-weight:700;font-size:15px;border:none;cursor:pointer;font-family:inherit}
.btn-black:hover{background:#2f2a22}
.btn-wa{background:#25D366;color:#fff;border-radius:999px;padding:14px 28px;font-weight:700;font-size:15px;border:none;cursor:pointer;display:inline-flex;align-items:center;gap:8px;font-family:inherit}
.btn-wa:hover{background:#1eb458;text-decoration:none}
.qnote{font-size:13px;color:#9a9086;margin-top:16px;line-height:1.7}

/* ---------- Nav dropdown (Products > sub-categories) ---------- */
.nav-item{position:relative}
.drop-trigger{display:inline-flex;align-items:center;gap:5px}
.drop-trigger .caret{opacity:.6;transition:transform .18s}
.nav-item:hover .drop-trigger .caret{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 22px);left:-16px;min-width:228px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 18px 42px rgba(16,33,28,.14);padding:8px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.18s;z-index:40}
.nav-item:hover .dropdown,.nav-item.open .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:10px 12px;border-radius:8px;font-size:14px;color:var(--ink);font-weight:600}
.dropdown a:hover{background:var(--bg-alt);color:var(--teal);text-decoration:none}

/* ---------- Q&A accordion ---------- */
.faq{background-color:var(--bg-alt);padding:84px 0}
.faq-card{background:#fff;border:1px solid #e8e2d8;padding:40px;max-width:800px;box-shadow:0 22px 55px rgba(70,52,34,.07)}
.faq-label{display:inline-block;color:var(--accent2);font-size:13px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;margin-bottom:18px}
.faq-title{font-family:Georgia,"Times New Roman","Songti SC",serif;font-size:clamp(26px,3.8vw,38px);font-weight:400;line-height:1.28;color:#26221e;margin-bottom:26px;padding-bottom:0}
.faq-title::after{display:none}
.faq-list{list-style:none;margin:0}
.faq-item{border-top:1px solid #efe9e0}
.faq-item:last-of-type{border-bottom:1px solid #efe9e0}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:18px;width:100%;background:none;border:none;text-align:left;padding:24px 0;font-family:inherit;font-size:19px;color:#2a2622;cursor:pointer;transition:color .18s}
.faq-q:hover{color:var(--accent2)}
.faq-q:focus-visible{outline:2px solid var(--accent2);outline-offset:3px}
.faq-icon{color:var(--accent2);font-size:24px;line-height:1;font-weight:300;flex-shrink:0;transition:transform .2s}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{color:var(--warm);font-size:15px;line-height:1.85;padding:0 40px 24px 0;max-width:660px}
.faq-item.open .faq-a{max-height:320px}
.faq-note{font-size:13px;color:#9a9086;margin-top:22px;line-height:1.7}

@media (max-width:900px){
  .quote-grid{grid-template-columns:1fr;gap:36px}
  .qleft .btn-wa{margin-top:20px}
}

@media (max-width:600px){
  .nav-links{display:none}
  .hero{padding:72px 0 64px}
  .section{padding:54px 0}
  .contact-list li{flex-direction:column;gap:2px}
  .contact-list .label{width:auto}
  .feat,.quote{padding:56px 0}
  .feat-card,.qform{padding:24px}
}