/* ==========================================================================
   SUMEIGUAN B2B - Cookware Manufacturing & OEM/ODM
   Light theme stylesheet. Single file, no external dependencies.
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root{
  --ink:#14161a;
  --ink-2:#3a4048;
  --muted:#6b7280;
  --line:#e6e2dc;
  --line-2:#f0ece6;
  --surface:#ffffff;
  --bg:#faf8f5;
  --bg-2:#f4f0ea;
  --brand:#b4542a;
  --brand-dk:#8e3f1e;
  --brand-soft:#fbe9df;
  --coal:#17191d;
  --coal-2:#23262c;
  --steel:#2f3a45;
  --ok:#2f7a5a;
  --warn:#d9b23a;

  --radius:4px;
  --radius-lg:8px;
  --shadow-sm:0 1px 2px rgba(20,22,26,.05), 0 1px 3px rgba(20,22,26,.04);
  --shadow-md:0 6px 18px rgba(20,22,26,.07), 0 2px 6px rgba(20,22,26,.04);
  --shadow-lg:0 18px 44px rgba(20,22,26,.10);

  --font:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --maxw:1200px;
  --hdr-h:72px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.7;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-dk)}
h1,h2,h3,h4{color:var(--ink);margin:0 0 .6em;line-height:1.2;letter-spacing:-.01em;font-weight:700}
h1{font-size:clamp(2rem,4.4vw,3.4rem);letter-spacing:-.025em}
h2{font-size:clamp(1.5rem,2.6vw,2.15rem);letter-spacing:-.02em}
h3{font-size:1.15rem}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin-bottom:.4em}
hr{border:0;border-top:1px solid var(--line);margin:0}
strong{color:var(--ink);font-weight:600}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ---------- 3. Layout ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section--tight{padding:56px 0}
.section--alt{background:var(--bg-2)}
.section--white{background:var(--surface)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.eyebrow{
  display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--brand);margin-bottom:14px;
}
.lead{font-size:1.06rem;color:var(--muted);max-width:70ch}
.muted{color:var(--muted)}
.tiny{font-size:.82rem}
.center{text-align:center}
.mt-0{margin-top:0}
.mb-0{margin-bottom:0}

/* ---------- 4. Topbar + Header ---------- */
.topbar{background:var(--coal);color:#fff;font-size:.8rem;border-bottom:2px solid var(--brand)}
.topbar__in{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:34px}
.topbar__msg{margin:0;opacity:.95}
.topbar__links{display:flex;gap:18px;white-space:nowrap}
.topbar__links a{color:#fff;opacity:.92;font-weight:600}
.topbar__links a:hover{opacity:1;color:#fff}

.site-header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-stuck{box-shadow:var(--shadow-sm)}
.header__in{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:var(--hdr-h)}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink)}
.brand:hover{color:var(--ink)}
.brand__mark{
  width:42px;height:42px;border-radius:var(--radius);background:var(--coal);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:1.15rem;letter-spacing:-.03em;flex:none;
  box-shadow:0 1px 3px rgba(20,22,26,.16);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__text strong{font-size:1.06rem;letter-spacing:.06em;font-weight:800}
.brand__text small{font-size:.68rem;color:var(--muted);letter-spacing:.05em;text-transform:uppercase}
.nav{display:flex;gap:26px;align-items:center}
.nav a{color:var(--ink-2);font-size:.92rem;font-weight:500;position:relative;padding:6px 0}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--brand);transition:right .22s ease}
.nav a:hover::after,.nav a[aria-current="page"]::after{right:0}
.nav a[aria-current="page"]{color:var(--ink);font-weight:600}
.header__cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--radius);padding:9px 10px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);margin:4px 0;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 5. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 24px;border-radius:var(--radius);border:1px solid transparent;
  font-size:.94rem;font-weight:600;cursor:pointer;transition:all .18s ease;line-height:1;
  font-family:inherit;text-align:center;
}
.btn--primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn--primary:hover{background:var(--brand-dk);border-color:var(--brand-dk);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn--dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn--dark:hover{background:#000;color:#fff;transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--ink);color:var(--ink);background:#fff}
.btn--light{background:#fff;color:var(--ink);border-color:var(--line)}
.btn--light:hover{border-color:var(--ink);color:var(--ink)}
.btn--sm{padding:10px 16px;font-size:.86rem}
.btn--lg{padding:17px 32px;font-size:1rem}
.btn--block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* ---------- 6. Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1100px 460px at 84% -12%, #fbe7da 0%, rgba(251,231,218,0) 62%),
    linear-gradient(180deg,#fdfbf8 0%, #ffffff 100%);
  border-bottom:1px solid var(--line);
}
.hero__in{display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:center;padding-top:84px;padding-bottom:88px}
.hero h1{margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--brand);position:relative}
.hero .lead{font-size:1.12rem;margin-bottom:30px}
.hero__points{list-style:none;padding:0;margin:0 0 32px;display:grid;gap:10px}
.hero__points li{display:flex;gap:10px;align-items:flex-start;font-size:.95rem;color:var(--ink-2)}
.hero__points svg{flex:none;margin-top:5px;color:var(--ok)}
.hero__visual{position:relative}
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);padding:26px;position:relative;overflow:hidden;
}
.spec-card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:linear-gradient(90deg,var(--brand),#e0a06f);
}
.spec-card__art{
  background:linear-gradient(160deg,#fbf7f3 0%,#f2ece5 100%);
  border-radius:var(--radius);display:grid;place-items:center;padding:26px;margin-bottom:20px;color:var(--steel);
}
.spec-card__art svg{width:200px;height:200px}
.spec-card__title{font-size:1.02rem;font-weight:700;color:var(--ink);margin:0 0 4px}
.spec-card__sub{font-size:.85rem;color:var(--muted);margin:0 0 16px}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  font-size:.74rem;font-weight:600;letter-spacing:.03em;text-transform:uppercase;
  background:var(--brand-soft);color:var(--brand-dk);border-radius:999px;padding:6px 12px;
}
.chip--steel{background:#eef1f4;color:var(--steel)}
.chip--line{background:#fff;border:1px solid var(--line);color:var(--ink-2)}

/* ---------- 7. Trust strip ---------- */
.trust-strip{background:var(--surface);border-bottom:1px solid var(--line)}
.trust-strip__in{display:grid;grid-template-columns:repeat(5,1fr);gap:0;padding:0}
.trust-item{padding:26px 20px;text-align:center;border-right:1px solid var(--line-2)}
.trust-item:last-child{border-right:0}
.trust-item svg{color:var(--brand);margin-bottom:8px}
.trust-item p{margin:0;font-size:.86rem;font-weight:600;color:var(--ink)}
.trust-item span{display:block;font-size:.74rem;color:var(--muted);font-weight:400;margin-top:2px}

/* ---------- 8. Cards ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px;transition:border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.card--hover:hover{border-color:#d8d2c9;transform:translateY(-3px);box-shadow:var(--shadow-md)}
.card__icon{
  width:44px;height:44px;border-radius:var(--radius);background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;margin-bottom:16px;
}
.card h3{margin-bottom:8px;font-size:1.06rem}
.card p{margin-bottom:0;font-size:.94rem;color:var(--muted)}
.card__num{
  font-size:.78rem;font-weight:800;letter-spacing:.14em;color:var(--brand);
  display:block;margin-bottom:12px;
}

/* Category cards */
.cat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#d8d2c9}
.cat-card__art{
  background:linear-gradient(160deg,#fbf7f3 0%,#f1ebe4 100%);
  padding:22px;display:grid;place-items:center;color:var(--steel);border-bottom:1px solid var(--line-2);
}
.cat-card__art svg{width:118px;height:118px}
.cat-card__body{padding:22px;flex:1;display:flex;flex-direction:column}
.cat-card__body h3{margin-bottom:6px;font-size:1.02rem}
.cat-card__body p{font-size:.9rem;color:var(--muted);margin-bottom:14px;flex:1}
.cat-card__meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.tag{font-size:.72rem;font-weight:600;color:var(--ink-2);background:var(--bg-2);border-radius:3px;padding:4px 9px}
.link-arrow{font-size:.88rem;font-weight:600;display:inline-flex;align-items:center;gap:6px}

/* ---------- 9. Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:step}
.step{padding:0 20px;border-left:1px solid var(--line);counter-increment:step}
.step:first-child{border-left:0;padding-left:0}
.step__num{
  font-size:.72rem;font-weight:800;letter-spacing:.14em;color:var(--brand);
  text-transform:uppercase;margin-bottom:10px;display:block;
}
.step__num::before{content:"0" counter(step) " / "}
.step h3{font-size:.98rem;margin-bottom:6px}
.step p{font-size:.87rem;color:var(--muted);margin:0}

/* ---------- 10. Stats / capability ---------- */
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--brand);border-radius:var(--radius);padding:22px}
.stat__num{font-size:1.6rem;font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.1}
.stat__label{font-size:.84rem;color:var(--muted);margin-top:4px}

/* ---------- 11. Lists ---------- */
.check-list{list-style:none;padding:0;margin:0}
.check-list li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px solid var(--line-2);font-size:.94rem}
.check-list li:last-child{border-bottom:0}
.check-list svg{flex:none;color:var(--ok);margin-top:4px}

/* ---------- 12. Tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface)}
table{width:100%;border-collapse:collapse;min-width:620px;font-size:.9rem}
thead th{
  background:var(--bg-2);color:var(--ink);text-align:left;font-weight:700;font-size:.78rem;
  letter-spacing:.06em;text-transform:uppercase;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
}
tbody td{padding:14px 18px;border-bottom:1px solid var(--line-2);vertical-align:top;color:var(--ink-2)}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fdfbf9}
td strong{color:var(--ink)}

/* ---------- 13. FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{
  cursor:pointer;list-style:none;padding:18px 40px 18px 0;position:relative;
  font-weight:600;color:var(--ink);font-size:1rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-size:1.4rem;font-weight:400;color:var(--brand);line-height:1;
}
.faq details[open] summary::after{content:"\2013"}
.faq details p{margin:0 0 20px;font-size:.94rem;color:var(--muted);max-width:82ch}

/* ---------- 14. Cert strip ---------- */
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.cert{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;text-align:center;transition:border-color .2s ease;
}
.cert:hover{border-color:var(--brand)}
.cert strong{display:block;font-size:.92rem;color:var(--ink)}
.cert span{font-size:.76rem;color:var(--muted)}

/* ---------- 15. CTA band ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--coal-2) 0%, var(--coal) 100%);
  border-radius:var(--radius-lg);padding:52px;color:#fff;
  display:grid;grid-template-columns:1.4fr auto;gap:36px;align-items:center;
  border-top:3px solid var(--brand);
  box-shadow:0 18px 40px rgba(20,22,26,.28);
}
.cta-band h2{color:#fff;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.86);margin:0;max-width:56ch}
.cta-band .btn--light{box-shadow:0 10px 26px rgba(0,0,0,.35)}

/* ---------- 16. Forms ---------- */
.form{display:grid;gap:20px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{display:flex;flex-direction:column;gap:7px}
.field label{font-size:.82rem;font-weight:600;color:var(--ink);letter-spacing:.01em}
.field label .req{color:var(--brand)}
.field input,.field select,.field textarea{
  font-family:inherit;font-size:.95rem;color:var(--ink);background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;width:100%;
  transition:border-color .18s ease, box-shadow .18s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(180,84,42,.12);
}
.field textarea{min-height:130px;resize:vertical}
.field .help{font-size:.76rem;color:var(--muted)}
.field--error input,.field--error select,.field--error textarea{border-color:#c0392b;box-shadow:0 0 0 3px rgba(192,57,43,.1)}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:.84rem;color:var(--muted)}
.consent input{width:auto;margin-top:4px;flex:none}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;opacity:0}
.form-status{border-radius:var(--radius);padding:14px 16px;font-size:.9rem;display:none}
.form-status.is-ok{display:block;background:#eefaf3;border:1px solid #bfe6d2;color:#1f6b4a}
.form-status.is-err{display:block;background:#fdf0ee;border:1px solid #f2c9c2;color:#a33325}
.form-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:36px;box-shadow:var(--shadow-md)}
.form-aside{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px}
.contact-line{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.contact-line:last-child{border-bottom:0}
.contact-line svg{flex:none;color:var(--brand);margin-top:4px}
.contact-line strong{display:block;font-size:.9rem;color:var(--ink)}
.contact-line span,.contact-line a{font-size:.88rem;color:var(--muted);word-break:break-word}

/* ---------- 17. Page head (inner pages) ---------- */
.page-head{
  background:linear-gradient(180deg,#fdfbf8 0%,#ffffff 100%);
  border-bottom:1px solid var(--line);padding:56px 0 44px;
}
.breadcrumb{font-size:.8rem;color:var(--muted);margin-bottom:14px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{color:var(--ink)}

/* ---------- 18. Footer ---------- */
.site-footer{background:var(--coal);border-top:1px solid var(--coal);padding:60px 0 0;margin-top:0}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer__grid h4{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;color:#f2efe9;margin-bottom:16px}
.footer__grid ul{list-style:none;padding:0;margin:0}
.footer__grid li{margin-bottom:10px}
.footer__grid a{color:rgba(255,255,255,.66);font-size:.9rem}
.footer__grid a:hover{color:var(--brand)}
.footer__about p{font-size:.9rem;color:rgba(255,255,255,.55);max-width:38ch}
.footer__bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:22px;padding-bottom:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer__bottom p{margin:0;font-size:.82rem;color:rgba(255,255,255,.45)}

/* ---------- 19. Utilities ---------- */
.tbd{
  background:#fff6d8;border-bottom:1px dashed var(--warn);border-radius:3px;
  padding:0 .28em;cursor:help;
}
.badge{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:5px 10px;border-radius:3px;background:var(--bg-2);color:var(--ink-2)}
.badge--brand{background:var(--brand-soft);color:var(--brand-dk)}
.badge--ok{background:#eefaf3;color:#1f6b4a}
.note{
  background:#fffdf5;border:1px solid #f0e6c8;border-left:3px solid var(--warn);
  border-radius:var(--radius);padding:16px 18px;font-size:.88rem;color:#6b5b2a;
}
.note strong{color:#5a4a1c}
.divider{height:1px;background:var(--line);margin:40px 0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.split--reverse .split__media{order:2}
.media-plate{
  background:linear-gradient(160deg,#fbf7f3 0%,#f1ebe4 100%);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  display:grid;place-items:center;padding:46px;color:var(--steel);
}
.media-plate svg{width:180px;height:180px}

/* ---------- 20. Reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
[data-reveal].is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 21. Responsive ---------- */
@media (max-width:1024px){
  .hero__in{grid-template-columns:1fr;gap:44px;padding-top:64px;padding-bottom:64px}
  .trust-strip__in{grid-template-columns:repeat(3,1fr)}
  .trust-item:nth-child(3n){border-right:0}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px}
  .step{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:20px}
  .step:first-child,.step:nth-child(2){border-top:0;padding-top:0}
  .grid-4,.stat-band,.cert-grid{grid-template-columns:repeat(2,1fr)}
  .split,.cta-band{grid-template-columns:1fr}
  .grid--contact{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .nav{
    position:fixed;inset:var(--hdr-h) 0 auto 0;background:#fff;flex-direction:column;
    align-items:stretch;gap:0;padding:8px 24px 20px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-md);display:none;
  }
  .nav.is-open{display:flex}
  .nav a{padding:14px 0;border-bottom:1px solid var(--line-2);font-size:1rem}
  .nav-toggle{display:block}
  .header__cta .btn{display:none}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .section{padding:60px 0}
  .form-panel{padding:24px}
  .topbar__msg{display:none}
  .topbar__in{justify-content:center}
}
@media (max-width:560px){
  .trust-strip__in{grid-template-columns:1fr 1fr}
  .trust-item{border-right:0;border-bottom:1px solid var(--line-2)}
  .grid-4,.stat-band,.cert-grid,.footer__grid{grid-template-columns:1fr}
  .cta-band{padding:32px}
  .media-plate,.spec-card__art{padding:28px}
}

/* ---------- 23. Photography ---------- */
.spec-card__art{padding:0;overflow:hidden;background:var(--bg-2)}
.spec-card__art img{width:100%;height:250px;object-fit:cover;object-position:center 62%;display:block}
.cat-card__art{padding:0;background:var(--bg-2)}
.cat-card__art img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block;transition:transform .5s ease}
.cat-card:hover .cat-card__art img{transform:scale(1.04)}
.media-plate{padding:0;overflow:hidden;background:var(--bg-2)}
.media-plate img{width:100%;height:100%;min-height:380px;object-fit:cover;display:block}
.line-photo{margin:0 0 22px;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface);box-shadow:var(--shadow-md)}
.line-photo img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.wide-photo{margin:0;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface);box-shadow:var(--shadow-lg)}
.wide-photo img{width:100%;aspect-ratio:21/9;object-fit:cover;display:block}
.wide-photo--compact{margin:0 0 30px}
.wide-photo--compact img{aspect-ratio:21/8}
@media (max-width:900px){
  .media-plate img{min-height:300px}
  .wide-photo img,.wide-photo--compact img{aspect-ratio:16/9}
}

/* ---------- 24. Split top alignment ---------- */
@media (min-width:1025px){
  .split > div:first-child{position:sticky;top:calc(var(--hdr-h) + 24px);align-self:start}
}

/* ---------- 25. Dark footer brand ---------- */
.site-footer .brand__mark{background:var(--coal-2);color:#fff;box-shadow:0 0 0 1px rgba(255,255,255,.16)}
.site-footer .brand__text strong{color:#fff}
.site-footer .brand__text small{color:rgba(255,255,255,.5)}

/* ---------- 26. Proven models (real Amazon listings) ---------- */
.proven-head{
  font-size:.75rem;font-weight:700;letter-spacing:.11em;text-transform:uppercase;
  color:var(--brand);margin:20px 0 8px;display:flex;align-items:center;gap:8px;
}
.proven-head::after{content:"";height:1px;flex:1;background:linear-gradient(90deg,var(--brand),transparent)}
.table-wrap .mut{color:var(--muted);font-size:.85em}

/* ---------- 28. Overflow guards (mobile) ---------- */
/* 网格子项默认 min-width:auto，会被图片固有宽度(1024px)撑破列宽导致整页横向溢出 */
.split>*,.hero__in>*,.cta-band>*,.grid-2>*,.grid-3>*,.grid-4>*,
.stat-band>*,.cert-grid>*,.footer__grid>*,.steps>*,.trust-strip__in>*,
.form-row>*{min-width:0}
html,body{overflow-x:clip}

/* ---------- 29. Product detail CTA (obvious button) ---------- */
.cat-card{position:relative}
.link-arrow{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-size:.86rem;font-weight:700;letter-spacing:.01em;line-height:1;
  color:var(--brand);background:#fff;
  padding:13px 20px;border:1.5px solid var(--brand);border-radius:999px;
  transition:background .18s ease,color .18s ease,box-shadow .18s ease;
}
.link-arrow svg{width:15px;height:15px;flex:none;transition:transform .18s ease}
.link-arrow:hover{background:var(--brand);color:#fff;box-shadow:var(--shadow-md)}
.link-arrow:hover svg{transform:translateX(3px)}
/* 整张卡片可点：伪元素铺满卡片，不改变视觉 */
.cat-card .link-arrow{align-self:stretch}
.cat-card .link-arrow::after{content:"";position:absolute;inset:0;z-index:1}
.cat-card:hover .link-arrow{background:var(--brand);color:#fff}
.cat-card:hover .link-arrow svg{transform:translateX(3px)}

/* ---------- 30. Proof band (real Amazon data) ---------- */
.proof-band{background:var(--coal);color:#fff;padding:60px 0}
.proof-band__head{max-width:680px;margin-bottom:36px}
.proof-band__kicker{font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:#e8955f;margin:0 0 10px}
.proof-band h2{color:#fff;margin-bottom:10px}
.proof-band__sub{color:rgba(255,255,255,.72);margin:0;font-size:.95rem}
.proof-band__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.proof-stat{background:var(--coal-2);border:1px solid rgba(255,255,255,.09);border-radius:var(--radius-lg);padding:20px 18px 17px}
.proof-stat__num{display:block;font-size:2rem;font-weight:700;color:#e8955f;letter-spacing:-.02em;line-height:1.1}
.proof-stat__label{display:block;font-size:.82rem;color:rgba(255,255,255,.66);margin-top:7px;line-height:1.45}
.proof-band__src{margin:24px 0 0;font-size:.75rem;color:rgba(255,255,255,.4)}

/* ---------- 31. Factory photo trio ---------- */
.photo-trio{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.photo-trio__item{margin:0;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface)}
.photo-trio__item img{width:100%;aspect-ratio:3/2;object-fit:cover;display:block}
.photo-trio__item figcaption{padding:10px 14px;font-size:.82rem;font-weight:600;color:var(--ink-2);border-top:1px solid var(--line-2)}

/* ---------- 32. Three hooks + card extras ---------- */
.hook-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px;display:flex;flex-direction:column}
.hook-card__step{font-size:.72rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.hook-card h3{margin-bottom:6px}
.hook-card p{font-size:.9rem;color:var(--muted);flex:1;margin-bottom:18px}
.hook-card--hot{border-color:var(--brand);box-shadow:var(--shadow-md)}
.hook-card--hot .hook-card__step{color:var(--brand)}
.hero__contact{margin:16px 0 0;font-size:.88rem;color:var(--muted)}
.hero__contact a{font-weight:600}
.cat-card__moq{font-size:.78rem;color:var(--muted);border-top:1px dashed var(--line-2);padding-top:10px;margin:0 0 12px}

/* ---------- 33. Mobile quote bar ---------- */
.mquote{position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;align-items:center;justify-content:space-between;gap:10px;background:var(--coal);color:#fff;padding:12px 18px calc(12px + env(safe-area-inset-bottom));text-decoration:none;box-shadow:0 -6px 20px rgba(0,0,0,.18)}
.mquote strong{font-size:.95rem;color:#fff}
.mquote span{font-size:.78rem;color:rgba(255,255,255,.62)}
@media (max-width:820px){
  .proof-band__stats{grid-template-columns:1fr 1fr}
  .photo-trio{grid-template-columns:1fr}
  .mquote{display:flex}
  body{padding-bottom:58px}
}

/* ---------- 34. Brand lockup (wordmark) ---------- */
.brand__text{display:flex;flex-direction:column;line-height:1.1;gap:0}
.brand__text strong{
  font-size:1.2rem;letter-spacing:.13em;font-weight:800;color:var(--ink);
  text-transform:uppercase;line-height:1.1;
}
.brand__text small{
  font-size:.62rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);position:relative;padding-top:7px;margin-top:2px;line-height:1.2;
}
.brand__text small::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:1px;background:var(--brand);opacity:.55;
}
.site-footer .brand__text strong{color:#fff}
.site-footer .brand__text small{color:#e8955f}
.site-footer .brand__text small::before{background:#e8955f;opacity:.6}
@media (max-width:560px){
  .brand__text strong{font-size:1.02rem;letter-spacing:.11em}
  .brand__text small{font-size:.56rem;letter-spacing:.12em}
}

/* ---------- 35. Dark header ---------- */
.site-header{background:rgba(23,25,29,.97);border-bottom-color:rgba(255,255,255,.08)}
.site-header.is-stuck{box-shadow:0 8px 22px rgba(0,0,0,.28)}
.site-header .brand{color:#fff}
.site-header .brand:hover{color:#fff}
.brand__text strong{color:#fff}
.brand__text small{color:#e8955f}
.brand__text small::before{background:#e8955f;opacity:.6}
.site-header .nav a{color:rgba(255,255,255,.8)}
.site-header .nav a:hover{color:#fff}
.site-header .nav a[aria-current=page],.site-header .nav a[aria-current="page"]{color:#fff}
.nav-toggle{border-color:rgba(255,255,255,.28)}
.nav-toggle span{background:#fff}
@media (max-width:820px){
  .nav{background:var(--coal);border-bottom:1px solid rgba(255,255,255,.1)}
  .nav a{color:rgba(255,255,255,.82);border-bottom:1px solid rgba(255,255,255,.08)}
}

/* ---------- 36. Mobile hero ---------- */
@media (max-width:820px){
  .hero__in{display:flex;flex-direction:column;align-items:stretch;gap:26px;padding-top:34px;padding-bottom:42px}
  .hero__visual{order:-1}
  .hero h1{font-size:1.72rem;margin-bottom:12px}
  .hero .lead{font-size:.98rem;margin-bottom:20px}
  .hero__points{gap:8px;margin-bottom:24px}
  .hero__points li{font-size:.9rem}
  .spec-card{padding:18px}
  .spec-card__art img{height:200px}
  .btn-row{gap:10px}
  .btn--lg{padding:13px 22px;font-size:.98rem}
}
@media (max-width:560px){
  .hero h1{font-size:1.58rem}
  .spec-card__art img{height:180px}
}

/* ---------- 37. Mobile quote bar v2 (copper floating pill) ---------- */
.mquote{
  background:linear-gradient(100deg,var(--brand) 0%,#c96531 55%,#d8793f 100%);
  color:#fff;left:12px;right:12px;
  bottom:calc(10px + env(safe-area-inset-bottom));
  border-radius:14px;padding:13px 18px;
  box-shadow:0 10px 26px rgba(120,52,20,.34), 0 2px 6px rgba(20,22,26,.16);
  border:1px solid rgba(255,255,255,.14);
}
.mquote strong{color:#fff;font-size:.98rem;letter-spacing:.01em}
.mquote span{color:rgba(255,255,255,.78);display:flex;align-items:center;gap:6px}
.mquote span::before{
  content:"";width:6px;height:6px;border-radius:50%;background:#fff;opacity:.85;flex:none;
}
@media (max-width:820px){
  body{padding-bottom:78px}
}

/* ---------- 38. Key-value tables (stack on mobile) ---------- */
@media (max-width:820px){
  .kv{min-width:0}
  .kv tbody tr{display:block;padding:11px 16px;border-bottom:1px solid var(--line-2)}
  .kv tbody tr:last-child{border-bottom:0}
  .kv tbody tr:hover{background:transparent}
  .kv tbody td{display:block;padding:2px 0;border:0;overflow-wrap:anywhere}
  .kv tbody td .mut{display:block;margin-top:3px}
}

/* ---------- 39. Data-table scroll affordance (mobile) ---------- */
@media (max-width:820px){
  .table-wrap{position:relative;-webkit-overflow-scrolling:touch}
  .table-wrap:not(:has(>table:not(.kv)))::after{display:none}
  .table-wrap::after{
    content:"Swipe \2192";position:absolute;top:8px;right:10px;
    background:var(--brand);color:#fff;font-size:.6rem;font-weight:700;
    letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:999px;
    pointer-events:none;opacity:.92;
  }
  table{min-width:560px;font-size:.84rem}
  thead th{padding:10px 12px}
  tbody td{padding:10px 12px}
}

/* ---------- 40. Mobile hero v3 (de-card, B2B pattern) ---------- */
.lead--m{display:none}
@media (max-width:820px){
  /* 长副标退场，短副标上场 */
  .hero .lead:not(.lead--m){display:none}
  .lead--m{display:block;font-size:1rem;margin-bottom:22px;color:var(--muted)}
  /* 图片全幅出血，去卡片装饰 */
  .hero__visual{order:2;margin:4px -24px 0}
  .spec-card{background:transparent;border:0;box-shadow:none;padding:0;border-radius:0}
  .spec-card::before{display:none}
  .spec-card__art{padding:0;border-radius:0;background:#eee}
  .spec-card__art img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;display:block}
  .spec-card__title,.spec-card__sub,.spec-card .chips{display:none}
}
@media (max-width:560px){
  .hero__visual{margin-left:-20px;margin-right:-20px}
}
/* ---------- 41. Mobile hero v5 (bg banner, image clearly visible) ---------- */
@media (max-width:820px){
  .hero{
    position:relative;
    background:url('../img/products/factory-hero.jpg') center top/cover no-repeat;
  }
  .hero::before{
    content:'';position:absolute;inset:0;pointer-events:none;
    background:linear-gradient(180deg,
      rgba(17,19,23,.93) 0%,
      rgba(17,19,23,.85) 36%,
      rgba(17,19,23,.66) 60%,
      rgba(17,19,23,.30) 82%,
      rgba(17,19,23,.10) 100%);
  }
  .hero__in{position:relative;z-index:1;padding-top:8px;padding-bottom:134px}
  .hero__visual{display:none}
  .hero .eyebrow{color:#e8955f;text-shadow:0 1px 10px rgba(0,0,0,.6)}
  .hero h1{color:#fff;text-shadow:0 2px 16px rgba(0,0,0,.62)}
  .hero h1 em{color:#e8955f}
  .lead--m{color:rgba(255,255,255,.9);text-shadow:0 1px 12px rgba(0,0,0,.6)}
  .hero__points li{color:rgba(255,255,255,.92);text-shadow:0 1px 10px rgba(0,0,0,.55)}
  .hero__points li strong{color:#fff}
  .hero__points li svg{color:#e8955f}
  .hero__contact{color:rgba(255,255,255,.68);text-shadow:0 1px 10px rgba(0,0,0,.5)}
  .hero__contact a{color:#e8955f}
  .btn--ghost{border-color:rgba(255,255,255,.55);color:#fff}
  .btn--ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}
}

/* ---------- 42. Mobile hero declutter ---------- */
@media (max-width:820px){
  .pt-tail{display:none}
  .lead--m{display:none}
  .hero__contact{display:none}
  .hero__in{padding-bottom:150px}
  .hero h1{font-size:1.66rem}
}

/* ---------- 43. Desktop hero card stretch ---------- */
@media (min-width:1025px){
  .hero__visual{align-self:stretch;display:flex}
  .hero__visual .spec-card{flex:1;display:flex;flex-direction:column}
  .spec-card__art{flex:1;display:flex;flex-direction:column;min-height:0}
  .spec-card__art img{height:auto;min-height:250px;flex:1;object-fit:cover}
}

/* ---------- 44. Desktop hero declutter ---------- */
.hero h1{font-size:clamp(1.9rem,3vw,2.6rem);max-width:22ch}
.hero .lead{font-size:1.06rem;margin-bottom:24px}
.hero__points{margin-bottom:26px}

/* ---------- 45. Split media stretch ---------- */
.split{align-items:stretch}
.media-plate{height:100%;display:flex;flex-direction:column;justify-content:center}
.media-plate img{height:100%;min-height:380px;flex:1;object-fit:cover}

/* ---------- 46. Download gate (resources) ---------- */
.dl-card{display:flex;flex-direction:column}
.dl-meta{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--brand);margin-bottom:10px}
.dl-gate{margin-top:auto;padding-top:16px}
.dl-form{display:flex;gap:8px}
.dl-form input[type=email]{
  flex:1;min-width:0;padding:10px 12px;font:inherit;font-size:.92rem;color:var(--ink);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
}
.dl-form input[type=email]:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.dl-form input[type=email].is-err{border-color:#c0392b;box-shadow:0 0 0 3px rgba(192,57,43,.12)}
.dl-fine{margin:9px 0 0;font-size:.78rem;color:var(--muted)}
.dl-link[hidden]{display:none}
.dl-done{display:flex;align-items:center;gap:10px}
.dl-ok{font-size:.85rem;color:var(--ok);font-weight:600}

/* ---------- 47. Document library (certifications) ---------- */
.doc-list{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--surface);overflow:hidden}
.doc-row{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;border-bottom:1px solid var(--line-2);color:inherit;transition:background .15s ease;
}
.doc-row:last-child{border-bottom:0}
.doc-row:hover{background:var(--bg)}
.doc-row > div{min-width:0}
.doc-row strong{display:block;font-size:1rem;margin-bottom:2px}
.doc-row span{display:block;font-size:.86rem;color:var(--muted)}
.doc-act{
  flex:none !important;display:inline-block;font-size:.76rem;font-weight:700;letter-spacing:.07em;
  text-transform:uppercase;color:var(--brand);background:var(--brand-soft);
  border-radius:99px;padding:6px 13px;white-space:nowrap;
}
.doc-row--req .doc-act{color:var(--muted);background:var(--bg-2)}

/* ---------- 48. Factory video split (certifications) ---------- */
.video-split{display:grid;grid-template-columns:1.15fr 1fr;gap:44px;align-items:center}
.video-card{
  position:relative;display:block;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow-md);isolation:isolate;
}
.video-card img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block;transition:transform .5s ease}
.video-card:hover img{transform:scale(1.03)}
.video-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,12,16,0) 45%,rgba(10,12,16,.55));z-index:1}
.video-card__play{
  position:absolute;z-index:2;top:50%;left:50%;transform:translate(-50%,-50%);
  width:66px;height:66px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.92);color:var(--brand-dk);
  box-shadow:0 10px 30px rgba(10,12,16,.35);transition:transform .2s ease;
}
.video-card:hover .video-card__play{transform:translate(-50%,-50%) scale(1.07)}
.video-card__chip{
  position:absolute;z-index:2;left:16px;bottom:14px;
  font-size:.76rem;font-weight:600;letter-spacing:.03em;color:#fff;
  background:rgba(20,22,26,.62);backdrop-filter:blur(4px);border-radius:99px;padding:6px 13px;
}
.video-copy .btn-row{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 49. Contact aside whatsapp ---------- */
.contact-line--wa .wa-chip{
  display:inline-block;font-size:.64rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ok);background:rgba(47,122,90,.12);border-radius:99px;padding:2px 8px;margin-left:6px;vertical-align:2px;
}
.contact-line--wa .wa-link{display:block;font-weight:600}
.field label .opt{color:var(--muted);font-weight:400;font-size:.82em}

@media (max-width:900px){
  .video-split{grid-template-columns:1fr;gap:28px}
  .doc-row{flex-direction:column;align-items:flex-start;gap:8px;padding:16px 18px}
}
@media (max-width:560px){
  .dl-form{flex-direction:column}
  .dl-form .btn{width:100%}
}
.contact-line--wa .wa-link[hidden]{display:none}

/* ---------- 50. Footer language switcher (EN / 中文) ---------- */
.lang-switch{
  display:inline-flex;align-items:center;gap:2px;padding:3px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:99px;
}
/* 单个切换按钮：按钮上写的是「点了会切过去的语言」 */
.lang-switch__btn{
  appearance:none;-webkit-appearance:none;background:transparent;border:0;cursor:pointer;
  font:inherit;font-size:.78rem;font-weight:600;letter-spacing:.04em;line-height:1.1;
  color:rgba(255,255,255,.82);padding:6px 18px;border-radius:99px;
  transition:background .16s ease,color .16s ease;
}
.lang-switch__btn:hover{background:rgba(255,255,255,.92);color:#14161a}
.lang-switch__btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
/* 中文层要等词典到位才生效。这段时间先把页面藏住（visibility 不影响布局，
   所以揭幕时不会跳版），避免看到「英文一闪、整页再变成中文」。
   内联脚本里挂了 2.5s 兜底，词典挂了也不会把页面藏死；禁用 JS 时根本不加
   data-lang="zh"，规则不生效，页面正常显示英文。 */
html[data-lang="zh"]:not([data-i18n-ready]) body{visibility:hidden}
html[data-lang="zh"] .footer__bottom p{font-size:.84rem}
html[data-lang="zh"] body{font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Noto Sans SC",var(--font,system-ui),sans-serif}
@media (max-width:640px){
  .footer__bottom{justify-content:flex-start}
  .lang-switch{margin-left:auto}
}