/* ============================================================
   BeginSense — Global Stylesheet
   Brand color sampled from official logo: #458999
   ============================================================ */
:root{
  --teal:#458999;
  --teal-dark:#2f6b7a;
  --teal-deep:#1d4e5c;
  --teal-50:#eef5f7;
  --teal-100:#dcebee;
  --ink:#0f2a33;
  --muted:#58707a;
  --line:#dfe9ec;
  --bg-soft:#f5f9fa;
  --amber:#e8a33d;
  --amber-soft:#fdf3e3;
  --radius:14px;
  --shadow:0 10px 30px rgba(15,42,51,.08);
  --shadow-lg:0 24px 60px rgba(15,42,51,.14);
  --font:"Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;overflow-x:hidden}
body{font-family:var(--font);color:var(--ink);line-height:1.65;background:#fff;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--teal-dark);text-decoration:none}
a:hover{color:var(--teal)}
ul{list-style:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
section{padding:88px 0}
.section-soft{background:var(--bg-soft)}

/* ---------- typography ---------- */
h1,h2,h3,h4{line-height:1.25;font-weight:700;letter-spacing:-.01em}
.eyebrow{display:inline-flex;align-items:center;font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--teal);margin-bottom:14px}

.section-title{font-size:clamp(26px,3.4vw,40px);margin-bottom:16px}
.section-sub{color:var(--muted);font-size:17px;max-width:720px}
.center{text-align:center}
.center .section-sub{margin-left:auto;margin-right:auto}
.lead{font-size:18px;color:var(--muted)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:999px;font-weight:600;font-size:15px;border:2px solid transparent;cursor:pointer;transition:all .25s ease}
.btn-primary{background:var(--teal);color:#fff}
.btn-primary:hover{background:#fff;color:var(--teal);border-color:var(--teal);transform:translateY(-2px);box-shadow:0 12px 24px rgba(69,137,153,.18)}
.hero .btn-primary:hover,.hero-slide .btn-primary:hover,.page-hero .btn-primary:hover{background:#fff;color:var(--teal);border-color:#fff;transform:translateY(-2px)}
.btn-outline{border-color:var(--teal);color:var(--teal-dark);background:transparent}
.btn-outline:hover{background:var(--teal);color:#fff}
.btn-ghost-w{border-color:rgba(255,255,255,.5);color:#fff}
.btn-ghost-w:hover{background:#fff;color:var(--teal-deep)}
.btn-sm{padding:9px 20px;font-size:14px}

/* ---------- header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:9999;background:#fff;border-bottom:1px solid var(--line)}
body{padding-top:74px}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand img{height:30px;width:auto}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav>li{position:relative}
.main-nav>li>a{display:flex;align-items:center;gap:5px;padding:10px 14px;font-size:15px;font-weight:600;color:var(--ink);border-radius:8px}
.main-nav>li>a:hover,.main-nav>li>a.active{color:var(--teal);background:var(--teal-50)}
.main-nav>li>a .caret{width:9px;height:9px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s}
.main-nav>li:hover>a .caret{transform:rotate(225deg) translateY(-2px)}
.dropdown{position:absolute;top:calc(100% + 6px);left:0;min-width:250px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-lg);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .22s ease}
.main-nav>li:hover .dropdown,.main-nav>li:focus-within .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:flex;flex-direction:column;padding:10px 14px;border-radius:8px;color:var(--ink)}
.dropdown a:hover{background:var(--teal-50);color:var(--teal-dark)}
.dropdown a small{color:var(--muted);font-weight:400;font-size:12.5px}
.header-cta{margin-left:10px}
.header-cta .btn-primary{background:var(--teal);color:#fff;border-color:var(--teal);border-radius:999px;padding:9px 20px}
.header-cta .btn-primary:hover{background:#fff;color:var(--teal);border-color:var(--teal);transform:translateY(-2px)}
.nav-toggle{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ink);margin:5px auto;transition:.25s}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;padding:120px 0 100px;background:
  radial-gradient(1000px 500px at 85% -10%,rgba(110,175,192,.4),transparent 60%),
  radial-gradient(700px 400px at -10% 110%,rgba(110,175,192,.28),transparent 55%),
  linear-gradient(135deg,#0f3442 0%,#17505f 55%,#21687e 100%)}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(32px,4.6vw,54px);margin:16px 0 20px}
.hero p{color:rgba(255,255,255,.78);font-size:18px;max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:36px}
.hero-badges span{font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08)}
.hero-visual{position:relative;display:flex;align-items:center;justify-content:center}
.hero-visual img{filter:drop-shadow(0 30px 50px rgba(0,0,0,.4));max-height:420px;object-fit:contain}
.hero-pulse{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;pointer-events:none}
.hero-pulse::before,.hero-pulse::after{content:"";position:absolute;width:340px;height:340px;border-radius:50%;border:1px solid rgba(255,255,255,.18);animation:pulse 4s ease-out infinite}
.hero-pulse::after{animation-delay:2s}
@keyframes pulse{0%{transform:scale(.55);opacity:.9}100%{transform:scale(1.5);opacity:0}}

/* page hero (inner pages) */
.page-hero{position:relative;color:#fff;padding:96px 0 72px;overflow:hidden;min-height:508px;display:flex;align-items:center;background:
  radial-gradient(800px 400px at 90% -20%,rgba(110,175,192,.4),transparent 60%),
  linear-gradient(120deg,#123f4e,#2a7183)}
.page-hero .wrap{width:100%}
.page-hero h1{font-size:clamp(30px,4vw,46px);margin:14px 0 16px}
.page-hero p{color:rgba(255,255,255,.78);max-width:680px;font-size:17px}
.breadcrumb{font-size:13.5px;color:rgba(255,255,255,.6)}
.breadcrumb a{color:rgba(255,255,255,.85)}
.breadcrumb a:hover{color:#fff}

/* ---------- stats ---------- */
.stats-band{background:var(--teal-deep);color:#fff}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{font-size:clamp(30px,3.6vw,44px);font-weight:800;color:#fff}
.stat-num em{font-style:normal;color:var(--amber)}
.stat-label{color:rgba(255,255,255,.7);font-size:14px;margin-top:4px}

/* ---------- cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 28px;transition:all .3s ease;position:relative}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--teal-100)}
.card-icon{width:52px;height:52px;border-radius:14px;background:var(--teal-50);display:flex;align-items:center;justify-content:center;margin-bottom:18px;color:var(--teal)}
.card-icon svg{width:26px;height:26px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}

/* product cards */
.product-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;display:flex;flex-direction:column;transition:all .3s ease}
.product-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.product-media{background:linear-gradient(160deg,var(--teal-50),#fff);padding:36px;display:flex;align-items:center;justify-content:center;min-height:280px}
.product-media img{max-height:230px;object-fit:contain;transition:transform .35s ease}
.product-card:hover .product-media img{transform:scale(1.06)}
.product-body{padding:26px 28px 30px;display:flex;flex-direction:column;flex:1}
.product-tag{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--teal)}
.product-body h3{font-size:22px;margin:6px 0 10px}
.product-body p{color:var(--muted);font-size:15px;flex:1}
.spec-chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 18px}
.spec-chips li{font-size:12.5px;font-weight:600;color:var(--teal-dark);background:var(--teal-50);border-radius:999px;padding:5px 12px}

/* ---------- feature list ---------- */
.check-list li{display:flex;gap:12px;padding:9px 0;color:var(--muted);font-size:15.5px}
.check-list li::before{content:"";flex:0 0 22px;height:22px;margin-top:2px;border-radius:50%;background:var(--teal-50) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23458999" stroke-width="3" stroke-linecap="round" stroke-linejoin="round"><polyline points="20 6 9 17 4 12"/></svg>') center/12px no-repeat}
.check-list li strong{color:var(--ink)}
body[data-page="products"] .check-list li::before{background:var(--teal-50);border-radius:50%;content:">";color:var(--teal);font-weight:800;font-size:14px;line-height:22px;text-align:center}
body[data-page="solutions"] .check-list li::before{background:none;content:"";width:9px;height:9px;flex:0 0 9px;border-radius:50%;background:var(--teal);margin-top:9px;margin-left:6px}

/* ---------- spec tables ---------- */
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.spec-table th,.spec-table td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line)}
.spec-table thead th{background:var(--teal-deep);color:#fff;font-size:13.5px;letter-spacing:.04em;white-space:nowrap}
.spec-table tbody th{background:var(--teal-50);color:var(--teal-dark);font-weight:600;width:220px;white-space:nowrap}
.spec-table tbody tr:hover td{background:#f2f8fa}
.spec-table td{color:var(--muted)}
.spec-table .row-group th{background:var(--teal-100);color:var(--teal-deep);text-transform:uppercase;font-size:12.5px;letter-spacing:.08em}
.table-scroll{overflow-x:auto;border-radius:var(--radius)}

/* model tabs */
.model-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:26px 0}
.model-tab{padding:10px 22px;border-radius:999px;border:1.5px solid var(--line);background:#fff;font-weight:600;font-size:14.5px;color:var(--muted);cursor:pointer;transition:.2s}
.model-tab:hover{border-color:var(--teal)}
.model-tab.active{background:var(--teal);border-color:var(--teal);color:#fff}
.model-panel{display:none}
.model-panel.active{display:block;animation:fadeIn .35s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* ---------- split sections ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split .media{border-radius:18px;background:linear-gradient(150deg,var(--teal-50),#fff);display:flex;align-items:center;justify-content:center;padding:44px;min-height:380px}
.split .media img{max-height:360px;object-fit:contain}
.split.rev>.media{order:2}

/* ---------- steps / timeline ---------- */
.steps{counter-reset:step;display:grid;gap:0}
.step{display:flex;gap:22px;padding:22px 0;border-bottom:1px dashed var(--line)}
.step:last-child{border-bottom:0}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);flex:0 0 52px;height:52px;border-radius:14px;background:var(--teal);color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center}
.step h4{font-size:17px;margin-bottom:6px}
.step p{color:var(--muted);font-size:15px}

/* ---------- solution hero cards ---------- */
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.solution-card{position:relative;border-radius:16px;padding:30px 26px;background:#fff;border:1px solid var(--line);transition:.3s;display:block;overflow:hidden}
.solution-card::after{content:"→";position:absolute;right:22px;bottom:18px;font-size:20px;color:var(--teal);opacity:0;transform:translateX(-8px);transition:.25s}
.solution-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--teal-100)}
.solution-card:hover::after{opacity:1;transform:none}
.solution-card .num{font-size:13px;font-weight:800;color:var(--teal);letter-spacing:.12em}
.solution-card h3{font-size:19px;margin:8px 0 8px}
.solution-card p{color:var(--muted);font-size:14.5px}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(120deg,var(--teal-deep),var(--teal));border-radius:22px;color:#fff;padding:56px 60px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;right:-80px;top:-80px;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.08)}
.cta-band h2{font-size:clamp(22px,2.8vw,32px);margin-bottom:8px}
.cta-band p{color:rgba(255,255,255,.8);max-width:560px}
.cta-band .btn{position:relative;z-index:1}

/* ---------- accordion ---------- */
.accordion{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.accordion-item+.accordion-item{border-top:1px solid var(--line)}
.accordion-q{width:100%;background:none;border:0;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:20px 24px;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;text-align:left;font-family:inherit}
.accordion-q::after{content:"+";font-size:22px;color:var(--teal);transition:transform .25s}
.accordion-item.open .accordion-q::after{transform:rotate(45deg)}
.accordion-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.accordion-a p{padding:0 24px 20px;color:var(--muted);font-size:15px}

/* ---------- forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-grid .full{grid-column:1/-1}
.field label{display:block;font-size:13.5px;font-weight:600;margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;color:var(--ink);background:#fff;transition:border .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--teal);box-shadow:0 0 0 4px rgba(69,137,153,.12)}
.field textarea{resize:vertical;min-height:130px}
.form-note{font-size:13px;color:var(--muted);margin-top:14px}
.form-success{display:none;background:var(--teal-50);border:1px solid var(--teal-100);color:var(--teal-deep);padding:14px 18px;border-radius:10px;font-size:14.5px;margin-top:16px}
.form-success.show{display:block}

/* contact info cards */
.contact-card{display:flex;gap:16px;align-items:flex-start;padding:20px;border:1px solid var(--line);border-radius:14px;background:#fff}
.contact-card .card-icon{margin:0;flex:0 0 46px;width:46px;height:46px}
.contact-card h4{font-size:15px;margin-bottom:3px}
.contact-card p{font-size:14.5px;color:var(--muted)}

/* ---------- footer ---------- */
.site-footer{background:#0b232c;color:rgba(255,255,255,.72);padding:72px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:48px;padding-bottom:48px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.04em}
.foot-col ul li{margin-bottom:11px}
.foot-col a{color:rgba(255,255,255,.68);font-size:14.5px}
.foot-col a:hover{color:#fff}
.foot-brand img{height:28px;margin-bottom:16px;filter:brightness(0) invert(1)}
.foot-brand p{font-size:14.5px;line-height:1.7}
.foot-contact li{display:flex;gap:10px;margin-bottom:12px;font-size:14px;line-height:1.55}
.foot-contact svg{flex:0 0 16px;margin-top:4px;color:var(--teal)}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.5px;color:rgba(255,255,255,.5)}

/* ---------- misc ---------- */
html.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
html.js .reveal.visible{opacity:1;transform:none}
@media print{html.js .reveal{opacity:1;transform:none}}
.pill{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-dark);background:var(--teal-50);padding:6px 14px;border-radius:999px}
.alert-note{display:flex;gap:12px;background:var(--amber-soft);border:1px solid #f3ddb8;color:#8a6116;border-radius:12px;padding:16px 20px;font-size:14.5px;margin-top:24px}
.alert-note svg{flex:0 0 20px;margin-top:2px}
.back-top{position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;background:var(--teal);color:#fff;border:0;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:.3s;z-index:90}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{background:var(--teal-dark)}
.divider{height:1px;background:var(--line);margin:0}
.badge-row{display:flex;gap:10px;flex-wrap:wrap}
.badge-row span{font-size:12.5px;font-weight:600;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:6px 14px;background:#fff}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr;gap:36px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .solution-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:860px){
  section{padding:64px 0}
  .hero-grid,.split{grid-template-columns:1fr;gap:40px}
  .split.rev>.media{order:0}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .hero{padding:88px 0 72px}
  .hero-visual img{max-height:300px}
  .cta-band{padding:40px 32px}
  /* mobile nav */
  .nav-toggle{display:block}
  .main-nav{position:fixed;top:74px;left:0;right:0;bottom:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:16px 20px 40px;overflow-y:auto;border-top:1px solid var(--line);transform:translateX(100%);transition:transform .3s ease;z-index:9999}
  .main-nav.open{transform:none}
  .main-nav>li>a{padding:15px 8px;font-size:17px;border-bottom:1px solid var(--line);border-radius:0;justify-content:space-between}
  .main-nav>li>a .caret{display:none}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;border-radius:0;padding:0 0 0 14px;display:none}
  .main-nav>li.expanded .dropdown{display:block}
  .main-nav>li.expanded>a .caret{display:inline-block}
  .header-cta{display:none}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .form-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  .grid-4,.solution-grid,.stats-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .spec-table th,.spec-table td{padding:11px 12px;font-size:13.5px}
  .step{gap:14px;padding:16px 0}
  .step::before{flex:0 0 40px;height:40px;border-radius:10px;font-size:15px}
  .step h4{font-size:15px}
  .step p{font-size:13.5px}
}