/* TUODI International — site stylesheet */
:root{
  --navy:#17306b; --navy-dark:#0f2149; --navy-soft:#e8edf8;
  --ink:#1c2536; --muted:#5a6478; --mist:#f4f6fa; --line:#e3e8f0;
  --amber:#e8a020; --wa:#1fae54; --wa-dark:#178a42;
  --radius:14px; --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,'Segoe UI',Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.6;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:16px;height:72px}
.brand{display:flex;flex-direction:column;line-height:1.15}
.brand-mark{font-weight:800;font-size:1.45rem;letter-spacing:.04em;color:var(--navy)}
.brand-reg{font-size:.6em;vertical-align:super}
.brand-sub{font-size:.68rem;color:#67718a;letter-spacing:.02em}
.site-nav{display:flex;align-items:center;gap:22px}
.nav-item{font-size:.92rem;font-weight:500;color:#2c3a4d;padding:6px 0}
.nav-item:hover{color:var(--navy)}
.has-drop{position:relative}
.drop{display:none;position:absolute;top:100%;left:-12px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(20,35,70,.12);min-width:230px;padding:8px 0}
.has-drop:hover .drop{display:block}
.drop a{display:block;padding:9px 18px;font-size:.9rem}
.drop a:hover{background:var(--mist)}
.nav-toggle{display:none;font-size:1.5rem;background:none;border:none;cursor:pointer;color:var(--navy)}

/* buttons */
.btn{display:inline-block;padding:12px 22px;border-radius:10px;font-weight:600;font-size:.95rem;transition:background .15s}
.btn-wa{background:var(--wa);color:#fff}
.btn-wa:hover{background:var(--wa-dark)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-dark)}
.btn-ghost{border:1.5px solid var(--navy);color:var(--navy)}
.btn-ghost:hover{background:var(--navy-soft)}

/* hero */
.hero{background:linear-gradient(115deg,var(--navy-dark) 0%,var(--navy) 55%,#28479b 100%);color:#fff;padding:64px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:44px;align-items:center}
.hero h1{font-size:2.35rem;line-height:1.2;font-weight:800;margin-bottom:16px}
.hero p{color:#ccd6ee;font-size:1.05rem;margin-bottom:24px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.hero-img{border-radius:var(--radius);overflow:hidden;box-shadow:0 18px 44px rgba(0,0,0,.35)}
.kicker{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--amber);margin-bottom:12px}

/* stat bar */
.stats{background:var(--navy-dark);color:#fff;padding:18px 0}
.stats .wrap{display:flex;flex-wrap:wrap;gap:10px 40px;justify-content:center}
.stat{text-align:center}
.stat b{display:block;font-size:1.25rem;font-weight:800;color:#fff}
.stat span{font-size:.75rem;color:#9fb0d6;letter-spacing:.04em;text-transform:uppercase}

/* sections */
.section{padding:64px 0}
.section.alt{background:var(--mist)}
.sec-head{max-width:720px;margin:0 auto 40px;text-align:center}
.sec-head h2{font-size:1.8rem;font-weight:800;color:var(--navy-dark);margin-bottom:10px}
.sec-head p{color:#5a6478}
h3{color:var(--navy-dark)}

/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.card-img{aspect-ratio:4/3;object-fit:cover;width:100%;background:#fff}
.card-img.contain{object-fit:contain;padding:12px}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:1.08rem;font-weight:700}
.card-body p{font-size:.9rem;color:#4a5470}
.card .model{font-size:.72rem;font-weight:700;letter-spacing:.1em;color:var(--amber);text-transform:uppercase}
.card .btn{margin-top:auto;align-self:flex-start;padding:9px 16px;font-size:.85rem}

/* product detail blocks */
.product{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:start;padding:40px 0;border-top:1px solid var(--line)}
.product:first-of-type{border-top:none}
.product-img{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.product h3{font-size:1.35rem;margin-bottom:4px}
.product .model{font-size:.78rem;font-weight:700;letter-spacing:.1em;color:var(--amber);text-transform:uppercase}
.product p{margin:10px 0;color:#3c4660}
.spec{width:100%;border-collapse:collapse;font-size:.88rem;margin:14px 0 18px}
.spec td{padding:7px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.spec td:first-child{color:#5f6a86;width:42%;font-weight:500}
.feat{margin:10px 0 16px;padding-left:20px;color:#3c4660;font-size:.93rem}
.feat li{margin-bottom:6px}

/* photo grid */
.photos{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.photos figure{border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff}
.photos img{aspect-ratio:4/3;object-fit:cover;width:100%}
.photos figcaption{padding:10px 14px;font-size:.82rem;color:#5f6a86}

/* misc */
.notice{background:var(--navy-soft);border-left:4px solid var(--navy);border-radius:8px;padding:16px 20px;font-size:.92rem;color:#2c3a5c;margin:26px 0}
.badges{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:18px 0}
.badge{border:1px solid var(--line);border-radius:10px;padding:12px 22px;font-weight:700;color:var(--navy-dark);background:#fff}
.badge small{display:block;font-weight:500;color:#68738f;font-size:.72rem}
.breadcrumb{font-size:.82rem;color:#68738f;padding:18px 0 0}
.breadcrumb a{color:#68738f}
.page-head{padding:36px 0 8px}
.page-head h1{font-size:2rem;font-weight:800;color:var(--navy-dark);margin-bottom:10px}
.page-head p{max-width:760px;color:#4a5470}
.cta-band{background:linear-gradient(115deg,var(--navy-dark),var(--navy));color:#fff;text-align:center;padding:52px 20px}
.cta-band h2{font-size:1.6rem;margin-bottom:10px}
.cta-band p{color:#c3cfec;margin-bottom:22px;max-width:640px;margin-left:auto;margin-right:auto}

/* footer */
.site-footer{background:var(--navy-dark);color:#c9d3ea;margin-top:64px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:36px;padding:52px 20px 36px}
.foot-brand{font-weight:800;font-size:1.15rem;color:#fff;margin-bottom:10px}
.foot-head{font-weight:700;color:#fff;margin-bottom:12px;font-size:.9rem;text-transform:uppercase;letter-spacing:.06em}
.site-footer a{display:block;color:#c9d3ea;font-size:.9rem;margin-bottom:8px}
.site-footer a:hover{color:#fff}
.site-footer .btn-wa{display:inline-block;color:#fff;margin-top:6px}
.foot-note{font-size:.82rem;color:#93a2c8;margin-bottom:12px}
.foot-note a{display:inline;color:#c9d3ea}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 20px;font-size:.78rem;color:#8493bb}

/* floating WhatsApp */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:60;width:56px;height:56px;border-radius:50%;background:var(--wa);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(31,174,84,.45);transition:transform .15s}
.wa-float:hover{transform:scale(1.08);background:var(--wa-dark)}

/* RFQ builder */
.rfq{background:var(--mist);border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;margin:30px 0}
.rfq h3{margin-bottom:6px}
.rfq p{font-size:.9rem;color:#4a5470;margin-bottom:16px}
.rfq label{display:block;font-size:.82rem;font-weight:600;color:#2c3a4d;margin:12px 0 4px}
.rfq input,.rfq select,.rfq textarea{width:100%;padding:10px 12px;border:1px solid #cfd7e4;border-radius:8px;font:inherit;font-size:.92rem;background:#fff}
.rfq textarea{min-height:70px;resize:vertical}
.rfq .btn{margin-top:16px}
.rfq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
@media (max-width:640px){.rfq-grid{grid-template-columns:1fr}}

/* FAQ */
.faq-item{border:1px solid var(--line);border-radius:10px;margin-bottom:12px;background:#fff}
.faq-item summary{padding:16px 20px;font-weight:600;cursor:pointer;color:var(--navy-dark);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";float:right;color:var(--amber);font-weight:700}
.faq-item[open] summary::after{content:"–"}
.faq-item .faq-a{padding:0 20px 16px;color:#3c4660;font-size:.93rem}
.related{border-top:1px solid var(--line);margin-top:34px;padding-top:18px;font-size:.86rem;color:#68738f}
.related a{margin-right:14px}

/* responsive */
@media (max-width:900px){
  .hero-grid,.grid-3,.grid-4,.product,.foot-grid{grid-template-columns:1fr 1fr}
  .photos{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .hero-grid,.grid-2,.grid-3,.grid-4,.product,.foot-grid,.photos{grid-template-columns:1fr}
  .hero h1{font-size:1.7rem}
  .site-nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;border-bottom:1px solid var(--line);padding:8px 0 16px}
  body.nav-open .site-nav{display:flex}
  .site-nav .nav-item,.site-nav .drop a{padding:11px 24px}
  .drop{display:block;position:static;border:none;box-shadow:none;padding:0 0 0 12px}
  .nav-cta{margin:10px 24px 0}
  .nav-toggle{display:block}
}