/* ============ Tianjin Shandi Technology — style ============ */
:root{
  --orange:#f26522;
  --orange-dark:#d14e12;
  --navy:#17263b;
  --ink:#2a3542;
  --muted:#66717f;
  --line:#e5e8ec;
  --bg:#ffffff;
  --bg-alt:#f6f7f9;
  --radius:10px;
  --shadow:0 6px 24px rgba(23,38,59,.08);
  --font:"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
img{max-width:100%;display:block}
a{color:var(--orange);text-decoration:none}
.container{max-width:1140px;margin:0 auto;padding:0 24px}

/* ---------- top announcement bar ---------- */
.topbar{background:var(--navy);color:#dbe4ee;font-size:13px}
.topbar-inner{display:flex;justify-content:center;gap:34px;flex-wrap:wrap;padding:8px 24px}
.topbar-inner span{position:relative;white-space:nowrap}
.topbar-inner span+span::before{content:"·";position:absolute;left:-19px;color:var(--orange);font-weight:700}
.topbar-inner span:first-child{color:#ffc7a8;font-weight:600}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;height:76px}
.brand{display:flex;align-items:center;gap:12px;color:var(--navy)}
.brand-logo{height:48px;width:auto;border-radius:6px}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;color:var(--navy)}
.brand-text small{font-size:11.5px;color:var(--muted);letter-spacing:.04em}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:20px}
.main-nav a{color:var(--ink);font-size:15px;font-weight:500}
.main-nav a:hover{color:var(--orange)}
.main-nav .nav-global{color:var(--orange);font-weight:600}
.main-nav .nav-global::before{content:"◉ ";font-size:11px;vertical-align:1px}
.main-nav a.nav-global:hover{color:var(--orange-dark)}
.main-nav .nav-cta{background:var(--orange);color:#fff;padding:9px 18px;border-radius:6px;font-weight:600}
.main-nav .nav-cta:hover{background:var(--orange-dark);color:#fff}
.header-tools{display:flex;align-items:center;gap:12px}
.lang-switch{display:flex;gap:2px;background:#f1f4f8;border:1.5px solid var(--line);border-radius:7px;padding:3px}
.lang-switch button{border:0;background:none;color:var(--muted);font-family:inherit;font-size:12.5px;font-weight:700;letter-spacing:.03em;padding:5px 9px;border-radius:5px;cursor:pointer;transition:.2s;white-space:nowrap}
.lang-switch button:hover{color:var(--orange)}
.lang-switch button.active{background:var(--orange);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:22px;height:2px;background:var(--navy);border-radius:2px}

/* ---------- hero ---------- */
.hero{background:linear-gradient(135deg,#17263b 0%,#22354f 60%,#2b3f5c 100%);color:#fff;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding:84px 24px 72px}
.hero-eyebrow{color:#ffb28a;font-weight:600;letter-spacing:.12em;text-transform:uppercase;font-size:13px;margin-bottom:14px}
.hero h1{font-size:clamp(30px,4.4vw,50px);line-height:1.15;font-weight:700;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero-sub{font-size:17.5px;color:#c8d2df;max-width:560px;margin-bottom:22px}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero-badge{display:inline-block;background:rgba(242,101,34,.16);border:1px solid rgba(242,101,34,.55);color:#ffc7a8;font-size:13.5px;font-weight:600;padding:9px 16px;border-radius:999px;line-height:1.4}
.hero-badge-alt{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.4);color:#e8edf3}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:38px}
.btn{display:inline-block;padding:13px 26px;border-radius:7px;font-weight:600;font-size:15.5px;transition:.2s;border:2px solid transparent}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark)}
.btn-ghost{border-color:rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.hero-stats{display:flex;gap:38px;list-style:none;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats strong{font-size:24px;color:#fff}
.hero-stats span{font-size:13px;color:#9fb0c3}
.hero-media{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hero-media img{border-radius:var(--radius);background:#fff;padding:10px;object-fit:cover;height:100%;box-shadow:var(--shadow)}
.hero-media img:first-child{grid-row:span 2}

/* ---------- sections ---------- */
.section{padding:84px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:680px;margin-bottom:44px}
.section-head h2{font-size:32px;color:var(--navy);margin-bottom:10px;position:relative;padding-top:18px}
.section-head h2::before{content:"";position:absolute;top:0;left:0;width:52px;height:4px;background:var(--orange);border-radius:2px}
.section-line{color:var(--muted);font-size:17px}

/* ---------- global remote delivery ---------- */
.global{background:#fff6f0;border-top:1px solid #fbe0cf;border-bottom:1px solid #fbe0cf;position:relative}
.global::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 92% 12%,rgba(242,101,34,.10),transparent 42%);pointer-events:none}
.global .container{position:relative}
.step-grid{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:38px;counter-reset:s}
.step{background:#fff;border:1px solid #f7d9c6;border-radius:var(--radius);padding:26px 22px;position:relative;transition:.25s}
.step:hover{transform:translateY(-4px);box-shadow:0 10px 26px rgba(242,101,34,.14);border-color:#f2a377}
.step-n{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--orange);color:#fff;font-weight:700;font-size:14px;margin-bottom:14px;letter-spacing:.02em}
.step h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.step p{font-size:14.5px;color:var(--muted)}
.gl-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:32px}
.gl-facts>div{background:rgba(255,255,255,.75);border:1px solid #fbe0cf;border-radius:var(--radius);padding:20px}
.gl-facts strong{display:block;color:var(--navy);font-size:15px;margin-bottom:6px}
.gl-facts strong::before{content:"✓";color:var(--orange);font-weight:700;margin-right:7px}
.gl-facts span{font-size:14px;color:var(--muted);display:block}
.gl-regions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;background:var(--navy);border-radius:var(--radius);padding:16px 22px;margin-bottom:34px}
.gl-regions-label{color:#ffb28a;font-size:13px;font-weight:600;text-transform:uppercase;letter-spacing:.1em;white-space:nowrap}
.gl-regions ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.gl-regions li{color:#e8edf3;font-size:14px;border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:5px 14px}
.gl-cta{text-align:center;margin:0;display:flex;flex-direction:column;align-items:center;gap:10px}
.gl-cta-note{font-size:13.5px;color:#9a7358}

/* ---------- why shandi ---------- */
.why{background:#fff}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:32px}
.why-card{border:1px solid var(--line);border-top:3px solid var(--orange);border-radius:var(--radius);padding:24px 22px;background:#fff;transition:.25s}
.why-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.why-card h3{font-size:17px;color:var(--navy);margin-bottom:9px}
.why-card p{font-size:14.5px;color:var(--muted)}
.why-band{display:flex;align-items:center;gap:24px;flex-wrap:wrap;background:var(--navy);border-radius:var(--radius);padding:24px 28px}
.why-band p{color:#e8edf3;font-size:16px;margin-right:auto;max-width:640px}
.why-band .btn{white-space:nowrap}

/* ---------- about ---------- */
.about-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:44px;align-items:start}
.about-text p{margin-bottom:16px;color:#3c4756}
.about-facts{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.about-facts h3{font-size:18px;color:var(--navy);margin-bottom:16px}
.about-facts table{width:100%;border-collapse:collapse;font-size:14.5px}
.about-facts th{text-align:left;color:var(--muted);font-weight:600;padding:9px 12px 9px 0;vertical-align:top;white-space:nowrap}
.about-facts td{padding:9px 0;color:var(--ink)}
.about-facts tr+tr th,.about-facts tr+tr td{border-top:1px solid var(--line)}

/* services */
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.svc-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.25s}
.svc-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#f6c9ae}
.svc-num{font-size:13px;font-weight:700;color:var(--orange);letter-spacing:.1em;margin-bottom:12px}
.svc-card h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.svc-card p{font-size:14.5px;color:var(--muted)}
.svc-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.svc-strip>div{border-left:3px solid var(--orange);padding:6px 0 6px 18px}
.svc-strip strong{display:block;font-size:14px;color:var(--navy);text-transform:uppercase;letter-spacing:.06em}
.svc-strip span{color:var(--muted);font-size:15px}

/* products */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.filter{border:1.5px solid var(--line);background:#fff;color:var(--ink);border-radius:999px;padding:8px 18px;font-size:14px;font-weight:500;cursor:pointer;font-family:inherit;transition:.2s}
.filter:hover{border-color:var(--orange);color:var(--orange)}
.filter.active{background:var(--navy);border-color:var(--navy);color:#fff}
.gallery{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.gallery-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;aspect-ratio:1;display:flex;align-items:center;justify-content:center;padding:14px;transition:.2s}
.gallery-item img{max-height:100%;object-fit:contain;transition:.25s}
.gallery-item:hover{box-shadow:var(--shadow)}
.gallery-item:hover img{transform:scale(1.05)}

/* equipment */
.eq-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin-bottom:26px;box-shadow:var(--shadow)}
.eq-head{display:flex;align-items:center;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.eq-head h3{font-size:20px;color:var(--navy);margin-right:auto}
.eq-thumb{height:64px;width:auto;border-radius:8px;border:1px solid var(--line);background:#fff;padding:6px}
.table-wrap{overflow-x:auto}
.eq-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
.eq-table th{background:var(--navy);color:#fff;text-align:left;padding:11px 14px;font-weight:600;white-space:nowrap}
.eq-table td{padding:10px 14px;border-bottom:1px solid var(--line);color:#3c4756}
.eq-table tr:last-child td{border-bottom:0}
.eq-table tr:nth-child(even) td{background:#fafbfc}

/* clients */
.client-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.client{background:#fff;border:1px solid var(--line);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;padding:26px;min-height:110px;transition:.2s;filter:grayscale(1);opacity:.85}
.client:hover{filter:none;opacity:1;box-shadow:var(--shadow)}
.client img{max-height:72px;max-width:82%;object-fit:contain}

/* contact */
.contact{background:linear-gradient(135deg,#17263b,#22354f);color:#fff}
.contact h2,.contact h3{color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:56px;align-items:start}
.contact h2{font-size:30px;margin-bottom:12px;position:relative;padding-top:18px}
.contact h2::before{content:"";position:absolute;top:0;left:0;width:52px;height:4px;background:var(--orange);border-radius:2px}
.contact-info>p{color:#b9c5d3;margin-bottom:26px;max-width:520px}
.ct-list{list-style:none;margin-bottom:30px}
.ct-list li{display:flex;gap:14px;padding:11px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.ct-list strong{min-width:130px;color:#ffb28a;font-weight:600;font-size:14px;text-transform:uppercase;letter-spacing:.05em}
.ct-list span,.ct-list a{color:#e8edf3;font-size:15px}
.ct-list a:hover{color:var(--orange)}
.ct-quote{list-style:none;margin:0 0 30px}
.ct-quote li{position:relative;padding:7px 0 7px 26px;color:#dbe4ee;font-size:14.5px;line-height:1.5}
.ct-quote li::before{content:"✓";position:absolute;left:0;color:var(--orange);font-weight:700}
.zh-inline{color:#9fb0c3}
.contact-form{background:#fff;color:var(--ink);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.contact-form h3{color:var(--navy)!important;font-size:20px;margin-bottom:20px}
.contact-form label{display:block;margin-bottom:16px}
.contact-form label span{display:block;font-size:13.5px;font-weight:600;color:var(--muted);margin-bottom:6px}
.contact-form input,.contact-form textarea{width:100%;border:1.5px solid var(--line);border-radius:7px;padding:11px 13px;font-size:15px;font-family:inherit;color:var(--ink);background:#fbfcfd}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--orange);background:#fff}
.contact-form .btn{width:100%}
.form-note{font-size:12.5px;color:var(--muted);margin-top:12px}

/* footer */
.site-footer{background:#101c2c;color:#8fa0b3;padding:34px 0;font-size:14px}
.footer-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
.footer-inner strong{color:#d7e0ea}
.foot-links a{color:#9fb0c3}
.foot-links a:hover{color:var(--orange)}

/* floating whatsapp */
.wa-float{position:fixed;right:22px;bottom:84px;width:50px;height:50px;border-radius:50%;background:#25d366;color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(37,211,102,.38);z-index:60;transition:.2s}
.wa-float:hover{background:#1eb455;transform:scale(1.06)}

/* back to top */
.back-top{position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;background:var(--orange);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:.25s;z-index:60}
.back-top.show{opacity:1;pointer-events:auto}

/* responsive */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;padding:60px 24px}
  .hero-media{order:-1;grid-template-columns:repeat(3,1fr)}
  .hero-media img:first-child{grid-row:auto}
  .about-grid{grid-template-columns:1fr}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .svc-strip{grid-template-columns:1fr}
  .step-grid{grid-template-columns:repeat(2,1fr)}
  .gl-facts{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:repeat(2,1fr)}
  .topbar-inner{gap:26px}
  .gallery{grid-template-columns:repeat(3,1fr)}
  .client-grid{grid-template-columns:repeat(3,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .main-nav{position:fixed;top:76px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:18px 24px;gap:16px;border-bottom:1px solid var(--line);transform:translateY(-140%);transition:.25s;box-shadow:var(--shadow)}
  .main-nav.open{transform:translateY(0)}
  .nav-toggle{display:flex}
  .header-inner{gap:12px}
}
@media (max-width:760px){
  .lang-switch button{padding:5px 7px;font-size:12px}
}
@media (max-width:560px){
  .gallery{grid-template-columns:repeat(2,1fr)}
  .client-grid{grid-template-columns:repeat(2,1fr)}
  .svc-grid{grid-template-columns:1fr}
  .step-grid{grid-template-columns:1fr}
  .gl-facts{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .why-band{padding:20px}
  .topbar-inner{flex-direction:column;gap:4px;align-items:center;padding:8px 16px}
  .topbar-inner span+span::before{content:"";left:0;display:none}
  .hero-stats{gap:22px}
  .brand-text small{display:none}
}