/* ===== Xinhai Mineral Processing EPC — main stylesheet ===== */
:root{
  --blue:#15388a; --blue-d:#0f2a6b; --blue-l:#2b56c4;
  --red:#c8102e; --red-d:#a00d24;
  --ink:#16202e; --muted:#5b6675; --line:#e2e8f2; --bg:#f5f8fd; --bg2:#eef3fb;
  --white:#fff; --steel:#33414f;
  --maxw:1180px; --r:12px; --shadow:0 4px 18px rgba(18,38,80,.08); --shadow-h:0 10px 30px rgba(18,38,80,.14);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--white);line-height:1.65;font-size:17px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--red)}
h1,h2,h3,h4{line-height:1.2;color:var(--ink);font-weight:800;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.2vw,3rem)}
h2{font-size:clamp(1.5rem,2.8vw,2.1rem);margin:0 0 .6em}
h3{font-size:1.2rem}
p{margin:0 0 1em}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.skip-link{position:absolute;left:-999px}
.skip-link:focus{left:8px;top:8px;background:#fff;padding:8px 14px;z-index:1000;border-radius:6px}

/* buttons */
.btn{display:inline-block;padding:13px 26px;border-radius:8px;font-weight:700;font-size:.98rem;border:2px solid transparent;cursor:pointer;transition:.18s;line-height:1.1}
.btn-accent{background:var(--red);color:#fff;border-color:var(--red)}
.btn-accent:hover{background:var(--red-d);border-color:var(--red-d);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn-ghost:hover{background:#fff;color:var(--blue);border-color:#fff}
.btn-blue{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn-blue:hover{background:var(--blue-d);color:#fff}

/* topbar */
.topbar{background:var(--blue-d);color:#cfe;font-size:.82rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar a{color:#dce8ff}.topbar a:hover{color:#fff}
.topbar-contact{font-weight:600}

/* header */
.site-header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(0,0,0,.02)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand img{height:46px;width:auto;object-fit:contain}
.site-nav .menu{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.site-nav .menu a{color:var(--ink);font-weight:600;padding:10px 14px;border-radius:7px;font-size:.97rem}
.site-nav .menu a:hover{background:var(--bg2);color:var(--blue)}
.site-nav .cta-li a{color:#fff}
.site-nav .cta-li a:hover{background:var(--red-d);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer}
.nav-toggle span{width:26px;height:3px;background:var(--ink);border-radius:2px;transition:.2s}

/* hero */
.hero{position:relative;color:#fff;background:linear-gradient(120deg,rgba(10,28,72,.92),rgba(15,42,107,.78)),url(../img/hero-plant.jpg) center/cover no-repeat}
.hero{background-image:linear-gradient(120deg,rgba(10,28,72,.92),rgba(15,42,107,.78)),image-set(url(../img/hero-plant.webp) type("image/webp"),url(../img/hero-plant.jpg) type("image/jpeg"))}
.hero .wrap{padding:84px 22px 78px;max-width:920px}
.hero .eyebrow{color:#9fc0ff;font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.82rem}
.hero h1{color:#fff;margin:.3em 0 .35em}
.hero p.lead{font-size:1.18rem;color:#e4ecfb;max-width:740px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap;margin-top:42px;border-top:1px solid rgba(255,255,255,.18);padding-top:24px}
.hero-stats .s b{display:block;font-size:1.9rem;font-weight:800;color:#fff}
.hero-stats .s span{color:#bcd0f5;font-size:.9rem}

/* sections */
.section{padding:64px 0}
.section.alt{background:var(--bg)}
.section-head{max-width:760px;margin:0 auto 40px;text-align:center}
.section-head .eyebrow{color:var(--red);font-weight:700;letter-spacing:.06em;text-transform:uppercase;font-size:.8rem}
.section-head p{color:var(--muted)}

/* grids + cards */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);transition:.2s;display:flex;flex-direction:column}
.card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px)}
.card-media{aspect-ratio:4/3;background:var(--bg2);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:6px;flex:1}
.card-body h3{margin:0;font-size:1.06rem}
.eyebrow{color:var(--red);font-weight:700;font-size:.72rem;letter-spacing:.05em;text-transform:uppercase}
.card-spec{color:var(--muted);font-size:.9rem;margin:0}
.card-link{margin-top:auto;color:var(--blue);font-weight:700;font-size:.9rem}
.cat-card .card-body p{color:var(--muted);font-size:.92rem;margin:0}

/* trust strip */
.trust{background:var(--blue-d);color:#dbe6ff}
.trust .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;padding:26px 22px}
.trust .t{display:flex;flex-direction:column}
.trust .t b{font-size:1.5rem;color:#fff}
.trust .t span{font-size:.85rem;color:#a9c2f2}

/* breadcrumbs */
.breadcrumbs{font-size:.85rem;color:var(--muted);padding:16px 0 0}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.breadcrumbs li+li::before{content:"›";margin-right:8px;color:#aab4c4}
.breadcrumbs a{color:var(--muted)}.breadcrumbs a:hover{color:var(--blue)}

/* page layout */
.page-head{background:var(--bg);border-bottom:1px solid var(--line);padding:0 0 38px}
.page-head h1{margin:.3em 0 .2em}
.page-head .sub{color:var(--muted);max-width:760px;font-size:1.08rem}
.content{padding:48px 0}
.content .wrap{max-width:1180px}
.layout{display:grid;grid-template-columns:1fr 320px;gap:48px;align-items:start}
.prose{max-width:780px}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.4em;font-size:1.12rem}
.prose ul,.prose ol{padding-left:1.3em}
.prose li{margin:.3em 0}
.prose img{border-radius:10px;margin:1.2em 0}
.prose blockquote{border-left:4px solid var(--blue);background:var(--bg);margin:1.2em 0;padding:14px 20px;border-radius:0 8px 8px 0;color:var(--steel)}

/* answer block (GEO) */
.answer-block{background:linear-gradient(180deg,#fff,#f3f7ff);border:1px solid #d4e0f6;border-left:4px solid var(--blue);border-radius:10px;padding:18px 22px;margin:0 0 26px}
.answer-block p{margin:0;font-size:1.06rem;color:var(--steel);font-weight:500}

/* specs table */
.specs{margin:32px 0}
.specs table{width:100%;border-collapse:collapse;font-size:.96rem;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.specs th,.specs td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.specs th{background:var(--bg2);width:38%;color:var(--steel);font-weight:700}
.specs tr:last-child th,.specs tr:last-child td{border-bottom:0}

/* article/prose comparison tables (wrapped by JS in .table-wrap) */
.prose .table-wrap{overflow-x:auto;margin:1.8em 0;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow);-webkit-overflow-scrolling:touch}
.prose .table-wrap table{width:100%;border-collapse:collapse;font-size:.95rem;background:#fff;min-width:520px;margin:0}
.prose .table-wrap thead th{background:linear-gradient(180deg,var(--blue),var(--blue-d));color:#fff;text-align:left;padding:14px 18px;font-weight:700;font-size:.86rem;letter-spacing:.02em;white-space:nowrap;border:0}
.prose .table-wrap tbody td,.prose .table-wrap tbody th{padding:13px 18px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);vertical-align:top;text-align:left;font-weight:400}
.prose .table-wrap tbody td:last-child,.prose .table-wrap tbody th:last-child{border-right:0}
.prose .table-wrap tbody tr:nth-child(even){background:var(--bg)}
.prose .table-wrap tbody tr:hover{background:var(--bg2)}
.prose .table-wrap tbody tr:last-child td,.prose .table-wrap tbody tr:last-child th{border-bottom:0}
.prose .table-wrap tbody td:first-child,.prose .table-wrap tbody th:first-child{font-weight:700;color:var(--steel)}

/* product hero */
.product-hero{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start;padding:34px 0 8px}
.product-gallery img{border-radius:var(--r);border:1px solid var(--line);width:100%}
.product-meta .price-tag{display:inline-block;background:var(--bg2);color:var(--blue-d);font-weight:800;padding:8px 16px;border-radius:8px;font-size:1.15rem;margin:4px 0 14px}
.product-meta .quickspecs{list-style:none;padding:0;margin:16px 0 22px;border-top:1px solid var(--line)}
.product-meta .quickspecs li{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.95rem}
.product-meta .quickspecs b{color:var(--steel)}
.product-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}

/* faq */
.faq{margin:38px 0}
.faq details{border:1px solid var(--line);border-radius:10px;margin-bottom:12px;background:#fff;overflow:hidden}
.faq summary{cursor:pointer;padding:16px 20px;font-weight:700;list-style:none;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:14px;font-size:1.4rem;color:var(--blue);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq .faq-a{padding:0 20px 16px;color:var(--steel)}

/* sidebar */
.sidebar .widget{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;margin-bottom:22px;box-shadow:var(--shadow)}
.sidebar h4{margin:0 0 12px;font-size:1.02rem}
.sidebar ul{list-style:none;padding:0;margin:0}
.sidebar li{border-bottom:1px solid var(--line)}
.sidebar li:last-child{border-bottom:0}
.sidebar li a{display:block;padding:9px 0;color:var(--steel);font-size:.93rem;font-weight:600}
.sidebar li a:hover{color:var(--blue)}
.sidebar .widget-cta{background:var(--blue);color:#fff;text-align:center}
.sidebar .widget-cta h4,.sidebar .widget-cta p{color:#fff}
.sidebar .widget-cta p{font-size:.9rem;color:#cfe0ff}

/* cta band */
.cta-band{background:linear-gradient(120deg,var(--blue-d),var(--blue-l));color:#fff}
.cta-band .wrap{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:48px 22px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin:0 0 .3em}
.cta-band p{color:#dbe6ff;margin:0;max-width:640px}

/* insights / posts */
.post-card .card-body .meta{color:var(--muted);font-size:.82rem}
.post-meta{color:var(--muted);font-size:.9rem;margin-bottom:18px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0}
.tag-row a{background:var(--bg2);color:var(--steel);padding:5px 12px;border-radius:20px;font-size:.82rem;font-weight:600}

/* related */
.related{margin-top:48px}
.related h2{font-size:1.4rem}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.contact-info .ci{display:flex;gap:14px;margin-bottom:20px}
.contact-info .ci .ico{width:42px;height:42px;flex:none;background:var(--bg2);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--blue);font-weight:800}
.form-field{margin-bottom:16px}
.form-field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px}
.form-field input,.form-field select,.form-field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:8px;font-family:inherit;font-size:1rem;background:#fff}
.form-field textarea{min-height:130px;resize:vertical}
.form-note{font-size:.82rem;color:var(--muted)}

/* footer */
.site-footer{background:#10192a;color:#aeb9cb;font-size:.92rem;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px;padding:54px 22px 36px}
.footer-brand img{height:50px;width:auto;background:#fff;padding:8px 12px;border-radius:8px;margin-bottom:14px}
.footer-brand p{color:#8e9bb0;max-width:340px}
.site-footer h4{color:#fff;font-size:.95rem;margin:0 0 14px;text-transform:uppercase;letter-spacing:.04em}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin:8px 0}
.footer-col a{color:#aeb9cb}.footer-col a:hover{color:#fff}
.site-footer address{font-style:normal;line-height:1.8;color:#8e9bb0}
.site-footer address a{color:#cdd7e6}
.footer-bottom{border-top:1px solid #20293c}
.footer-bottom .wrap{display:flex;justify-content:space-between;gap:16px;padding:18px 22px;font-size:.82rem;color:#7c889c;flex-wrap:wrap}

/* responsive */
@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .layout{grid-template-columns:1fr}
  .product-hero{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media(max-width:760px){
  body{font-size:16px}
  .nav-toggle{display:flex}
  .site-nav{position:fixed;inset:74px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);transform:translateY(-130%);transition:.25s;box-shadow:var(--shadow);max-height:80vh;overflow:auto}
  .site-nav.open{transform:translateY(0)}
  .site-nav .menu{flex-direction:column;align-items:stretch;padding:14px}
  .site-nav .menu a{padding:13px 12px}
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .topbar .wrap{justify-content:center}.topbar-contact{display:none}
  .cta-band .wrap{flex-direction:column;align-items:flex-start}
}