/* LUANKUN - luankun-eco.com  |  single stylesheet, no build step */
:root{
  --ink:#0e1b26;
  --ink-2:#1d2f3d;
  --muted:#5d7284;
  --line:#e2e9ee;
  --bg:#ffffff;
  --bg-alt:#f5f8fa;
  --brand:#0f3b53;
  --accent:#0f9d8c;
  --accent-2:#c9a227;
  --radius:14px;
  --shadow:0 10px 30px rgba(14,27,38,.08);
  --wrap:1200px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--accent)}
h1,h2,h3{line-height:1.22;margin:0 0 .6em;font-weight:650;letter-spacing:-.01em}
h1{font-size:clamp(28px,4vw,44px)}
h2{font-size:clamp(22px,2.6vw,32px)}
h3{font-size:19px}
p{margin:0 0 1em}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.narrow{max-width:860px}
.center{text-align:center}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.media-note{margin:10px 0 0;font-size:13px;color:var(--muted)}
.g-note{font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--accent)}
.muted{color:var(--muted)}
.small{font-size:14px}
.plain{list-style:none;margin:0;padding:0}
.plain li{margin:0 0 .5em}
ul.ticks{list-style:none;margin:0 0 1.4em;padding:0}
ul.ticks li{position:relative;padding-left:26px;margin-bottom:.5em}
ul.ticks li::before{
  content:"";position:absolute;left:4px;top:.62em;width:8px;height:8px;
  border-radius:2px;background:var(--accent);transform:rotate(45deg);
}

/* buttons */
.btn{
  display:inline-block;padding:12px 22px;border-radius:999px;font-weight:600;font-size:15px;
  border:1px solid transparent;transition:.18s ease;cursor:pointer;text-align:center;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#0c8878;color:#fff}
.btn-ghost{background:transparent;border-color:rgba(15,59,83,.25);color:var(--brand)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}

/* header */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:14px;min-height:74px;flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
.brand{display:flex;flex-direction:column;line-height:1.1;margin-right:auto}
.brand-mark{font-size:22px;font-weight:700;letter-spacing:.18em;color:var(--brand)}
.brand-sub{font-size:10.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--muted)}
.site-nav{display:flex;gap:14px;flex-wrap:wrap;row-gap:2px}
.site-nav a{font-size:14px;color:var(--ink-2);padding:6px 0;border-bottom:2px solid transparent}
.site-nav a:hover,.site-nav a.is-active{color:var(--accent);border-bottom-color:var(--accent)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font:inherit}
.lang-switch{display:flex;gap:5px;align-items:center;font-size:12px}
.lang-switch a{
  border:1px solid var(--line);border-radius:999px;padding:3px 7px;color:var(--muted);letter-spacing:.04em
}
.lang-switch a:hover{border-color:var(--accent);color:var(--accent)}
.lang-switch a.is-active{background:var(--brand);border-color:var(--brand);color:#fff}
.header-cta{padding:9px 15px;font-size:13.5px}

/* right-to-left (Arabic) */
[dir="rtl"] body{text-align:right}
[dir="rtl"] .brand{margin-right:0;margin-left:auto}
[dir="rtl"] .brand-mark,[dir="rtl"] .brand-sub{letter-spacing:.08em}
[dir="rtl"] ul.ticks li{padding-left:0;padding-right:26px}
[dir="rtl"] ul.ticks li::before{left:auto;right:4px}
[dir="rtl"] .faq summary::after{float:left}
[dir="rtl"] .contact-list strong{text-align:right}
[dir="rtl"] ol.steps li{text-align:right}
[dir="rtl"] .split,[dir="rtl"] .feature-row{direction:rtl}
[dir="rtl"] table.data-table th,[dir="rtl"] table.data-table td{text-align:right}

/* hero */
.hero{position:relative;min-height:min(78vh,660px);overflow:hidden;background:var(--ink)}
.slides{position:relative;height:min(78vh,660px)}
.slide{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;transition:opacity .8s ease;display:flex;align-items:center;
}
.slide.is-active{opacity:1}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(9,20,29,.82),rgba(9,20,29,.35) 60%,rgba(9,20,29,.1))}
.slide-inner{position:relative;z-index:2;color:#fff;max-width:640px}
.slide-inner h2{color:#fff;font-size:clamp(26px,3.6vw,42px)}
.kicker{text-transform:uppercase;letter-spacing:.22em;font-size:12px;color:var(--accent-2);margin-bottom:10px}
.slide-sub{color:rgba(255,255,255,.86);font-size:17px;max-width:520px}
.slide-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.slide .btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.slide .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.12)}
.hero-dots{position:absolute;left:0;right:0;bottom:22px;display:flex;gap:10px;justify-content:center;z-index:3}
.dot{width:34px;height:4px;border:0;border-radius:2px;background:rgba(255,255,255,.4);cursor:pointer;padding:0}
.dot.is-active{background:var(--accent-2)}

/* bands & sections */
.band{background:var(--brand);color:#fff}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:26px 24px}
.stat{text-align:center}
.stat-value{display:block;font-size:26px;font-weight:700;color:#fff}
.stat-label{font-size:13px;color:rgba(255,255,255,.75)}
.section{padding:74px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head p{color:var(--muted);font-size:17px}

.page-hero{background:var(--brand);color:#fff;padding:70px 0 60px}
.page-hero h1{color:#fff;max-width:900px}
.page-hero p{color:rgba(255,255,255,.82);max-width:760px;margin:0}

/* grid & cards */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.2s ease;display:block;color:inherit}
.card:hover{box-shadow:var(--shadow);transform:translateY(-3px);color:inherit}
.card-media{aspect-ratio:4/3;overflow:hidden;background:var(--bg-alt)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:.4s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:18px 20px 22px}
.card-body h3{margin-bottom:.35em}
.card-body p{font-size:14.5px;margin:0}
.card-plain{padding:24px;transform:none}
.card-plain:hover{transform:none;box-shadow:var(--shadow)}
.badges{list-style:none;display:flex;gap:8px;flex-wrap:wrap;padding:0;margin:14px 0 0}
.badges li{border:1px solid var(--line);border-radius:999px;padding:3px 10px;font-size:12px;color:var(--muted)}
.mh-card{padding:22px 20px;display:flex;flex-direction:column;gap:6px;transform:none}
.mh-card:hover{transform:none;box-shadow:var(--shadow)}
.mh-value{font-size:26px;font-weight:700;color:var(--brand);line-height:1.15}
.mh-label{font-size:14px;color:var(--muted)}
.cat-block{margin-bottom:64px;scroll-margin-top:96px}
.cat-block h3{margin-top:22px}
.material-highlights{margin-bottom:14px}
.chip-nav{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:40px}
.chip{border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;color:var(--ink-2)}
.chip:hover{border-color:var(--accent);color:var(--accent)}

/* split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.split-media img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%}

/* stats inside light sections */
.band + .section .stat-value{color:inherit}

/* tables */
.table-scroll{overflow-x:auto;margin:18px 0 26px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.data-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
table.data-table th,table.data-table td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.data-table thead th{background:var(--bg-alt);font-weight:600;color:var(--ink-2);white-space:nowrap}
table.data-table tbody tr:last-child td{border-bottom:0}

/* steps */
ol.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
ol.steps li{display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.step-no{font-size:22px;font-weight:700;color:var(--accent);line-height:1}
ol.steps h3{font-size:16px;margin:.1em 0 .35em}
ol.steps p{margin:0;font-size:14px}

/* gallery */
.gallery-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.gallery-strip figure{margin:0;position:relative;border-radius:12px;overflow:hidden;background:var(--bg-alt)}
.gallery-strip img{aspect-ratio:4/3;object-fit:cover;width:100%}
.gallery-strip figcaption{position:absolute;left:0;right:0;bottom:0;padding:10px 12px;font-size:13px;color:#fff;background:linear-gradient(transparent,rgba(9,20,29,.8))}
.gallery-strip .g-note{color:var(--accent-2)}
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.g-item{margin:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.g-item img{aspect-ratio:4/3;object-fit:cover;width:100%}
.g-item figcaption{padding:14px 16px;display:flex;flex-direction:column;gap:4px}
.g-item figcaption span{font-size:13.5px;color:var(--muted)}

/* features rows */
.feature-row{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;align-items:center}
.feature-media img{border-radius:var(--radius);box-shadow:var(--shadow)}

/* faq */
.faq{background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px 20px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-weight:700}
.faq[open] summary::after{content:"-"}
.faq p{margin:0 0 16px;color:var(--muted);font-size:15px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px}
.inquiry-form{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.inquiry-form label{display:flex;flex-direction:column;gap:6px;font-size:14px;font-weight:600}
.inquiry-form label.wide{grid-column:1/-1}
.inquiry-form input,.inquiry-form textarea{
  font:inherit;font-weight:400;padding:11px 13px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink)
}
.inquiry-form input:focus,.inquiry-form textarea:focus{outline:2px solid rgba(15,157,140,.25);border-color:var(--accent)}
.inquiry-form button{justify-self:start;grid-column:1/-1}
.form-note,.form-status{grid-column:1/-1;font-size:13.5px;color:var(--muted);margin:0}
.form-status[data-ok]{color:var(--accent);font-weight:600}
.contact-list li{display:flex;gap:12px;border-bottom:1px dashed var(--line);padding-bottom:10px}
.contact-list strong{min-width:120px;color:var(--ink-2);font-size:14px}
.contact-list span{font-size:15px}
.map-embed iframe{width:100%;height:320px;border:0;border-radius:var(--radius);box-shadow:var(--shadow)}

/* cta */
.cta{background:var(--brand);color:#fff}
.cta h2{color:#fff}
.cta-inner{display:grid;grid-template-columns:1.3fr .7fr;gap:36px;align-items:center}
.cta p{color:rgba(255,255,255,.85)}
.cta-contact{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.cta .btn-ghost{border-color:rgba(255,255,255,.4);color:#fff}
.cta .btn-ghost:hover{border-color:#fff;color:#fff}
.cta-facts{color:rgba(255,255,255,.85)}
.cta-facts a{color:#fff}

/* product hero */
.product-hero{background:var(--bg-alt);padding:60px 0}
.product-hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.product-hero-media img{border-radius:var(--radius);box-shadow:var(--shadow)}
.product-hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}

/* footer */
.site-footer{background:var(--ink);color:rgba(255,255,255,.78);padding:56px 0 26px;font-size:14.5px}
.site-footer h3{color:#fff;font-size:15px;letter-spacing:.04em;text-transform:uppercase;margin-bottom:14px}
.site-footer a{color:rgba(255,255,255,.82)}
.site-footer a:hover{color:var(--accent-2)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand{font-size:20px;letter-spacing:.18em;color:#fff;font-weight:700;margin-bottom:8px}
.site-footer .muted{color:rgba(255,255,255,.6)}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);font-size:13px}

/* responsive */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  ol.steps{grid-template-columns:repeat(2,1fr)}
  .gallery-strip{grid-template-columns:repeat(2,1fr)}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
  .split,.cta-inner,.contact-grid,.product-hero-inner,.feature-row{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .site-nav{display:none}
  .site-nav.is-open{display:flex;position:absolute;top:74px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:10px 24px 18px}
  .site-nav.is-open a{padding:11px 0;border-bottom:1px solid var(--line)}
  .nav-toggle{display:block}
  .header-cta{display:none}
}
@media (max-width:620px){
  .grid-3,.grid-4,.gallery-strip,.gallery-grid,ol.steps,.footer-grid{grid-template-columns:1fr}
  .inquiry-form{grid-template-columns:1fr}
  .section{padding:52px 0}
  .slide-inner{max-width:none}
}