/* ============================================================
   WIS Security — Website Design System (Midnight Flagship)
   Palette: deep navy + electric blue + cyan. NO GREEN.
   ============================================================ */
:root{
  --navy:#08142A; --navy2:#0C2040; --navy3:#0E2244;
  --blue:#3B82F6; --blue-d:#2563EB; --cyan:#38BDF8;
  --ink:#0F172A; --muted:#5B6B82; --line:#E4EAF2;
  --bg:#FFFFFF; --soft:#F5F8FC; --soft2:#EEF3FB;
  --gold:#C9A24A;
  --maxw:1160px; --rad:12px;
  --shadow:0 10px 30px rgba(10,27,51,.10);
  --font:"Segoe UI","Microsoft YaHei","PingFang SC",Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px;}
.section{padding:72px 0;}
.kicker{font-size:12px;letter-spacing:2.5px;text-transform:uppercase;color:var(--blue);font-weight:800;margin-bottom:10px;}
h1,h2,h3{line-height:1.15;letter-spacing:.2px;}
h2{font-size:34px;margin-bottom:14px;}
h3{font-size:20px;}
.lead{font-size:18px;color:var(--muted);}
.muted{color:var(--muted);}
.center{text-align:center;}
.rule{width:56px;height:4px;background:var(--gold);border-radius:3px;margin:14px 0 26px;}
.center .rule{margin-left:auto;margin-right:auto;}

/* ---- language toggle ---- */
body.lang-en [data-lang="zh"]{display:none !important;}
body.lang-zh [data-lang="en"]{display:none !important;}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;border-radius:9px;
  padding:13px 22px;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.18s;}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-d);}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.12);}
.btn-outline{border-color:var(--line);color:var(--ink);background:#fff;}
.btn-outline:hover{border-color:var(--blue);color:var(--blue);}

/* ---- nav ---- */
.nav{position:sticky;top:0;z-index:50;background:rgba(8,20,42,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);}
.nav .wrap{display:flex;align-items:center;gap:26px;height:70px;}
.nav-logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;letter-spacing:1px;flex:0 0 auto;}
.nav-logo img{height:48px;width:auto;display:block;}
.nav-links .mcontact{display:none;}
.nav-links{display:flex;gap:22px;color:#C6D4EA;font-size:14.5px;font-weight:600;}
.nav-links a{position:relative;display:inline-block;}
.nav-links a:hover{color:#fff;}
.nav-links a.active{color:#fff;}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-19px;height:3px;border-radius:3px;background:var(--gold);}
.nav-right .btn.active{background:var(--blue-d);box-shadow:0 0 0 2px rgba(201,162,74,.9);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px;}
.lang{display:flex;border:1px solid rgba(255,255,255,.3);border-radius:8px;overflow:hidden;font-size:12.5px;}
.lang button{background:none;border:0;color:#C6D4EA;padding:5px 10px;cursor:pointer;font-weight:700;}
.lang button.on{background:var(--blue);color:#fff;}
.nav-burger{display:none;background:none;border:0;color:#fff;font-size:22px;cursor:pointer;}

/* ---- hero (full-bleed) ---- */
.hero{position:relative;color:#fff;overflow:hidden;
  background:linear-gradient(180deg,rgba(6,14,30,.45),rgba(6,14,30,.82)),
    repeating-linear-gradient(120deg,#0C2040,#0C2040 22px,#122A52 22px,#122A52 44px);}
.hero-in{max-width:var(--maxw);margin:0 auto;padding:110px 22px 90px;text-align:center;}
.hero .eyebrow{font-size:13px;letter-spacing:3px;color:#7FD1FF;font-weight:800;margin-bottom:16px;}
.hero h1{font-size:56px;font-weight:800;letter-spacing:.3px;}
.hero p{font-size:19px;color:#C6D6EC;max-width:640px;margin:18px auto 26px;}
.hero .cta{display:flex;gap:14px;justify-content:center;}
.stats{display:flex;gap:46px;justify-content:center;margin-top:44px;flex-wrap:wrap;}
.stats .s b{display:block;font-size:30px;font-weight:800;}
.stats .s span{font-size:13px;color:#A9C0DE;}

/* ---- trust bar ---- */
.trustbar{background:var(--navy);color:#A9C0DE;font-size:13px;}
.trustbar .wrap{display:flex;gap:26px;flex-wrap:wrap;justify-content:center;padding:13px 22px;}
.trustbar b{color:#fff;}

/* ---- cards / grid ---- */
.grid{display:grid;gap:20px;}
.g2{grid-template-columns:1fr 1fr;}
.g3{grid-template-columns:repeat(3,1fr);}
.g4{grid-template-columns:repeat(4,1fr);}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--rad);padding:24px;box-shadow:var(--shadow);}
.card h3{margin-bottom:8px;}
.card .ico{width:42px;height:42px;border-radius:10px;background:var(--soft2);display:flex;align-items:center;
  justify-content:center;margin-bottom:14px;color:var(--blue);font-weight:800;}
.tile{background:var(--soft);border:1px solid var(--line);border-radius:var(--rad);padding:24px 18px;text-align:center;
  transition:.18s;font-weight:700;}
.tile:hover{transform:translateY(-3px);border-color:var(--blue);color:var(--blue);box-shadow:var(--shadow);}
.tile .ico{font-size:22px;display:block;margin-bottom:10px;color:var(--blue);}

/* ---- logo walls ---- */
.logowall{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.logowall .lg{border:1px solid var(--line);border-radius:12px;height:112px;display:flex;align-items:center;
  justify-content:center;background:#fff;padding:16px;transition:.2s;}
.logowall .lg:hover{border-color:var(--blue);box-shadow:0 8px 22px rgba(20,50,100,.10);}
.logowall .lg img{max-height:68px;max-width:86%;width:auto;height:auto;object-fit:contain;}
.tier{font-size:13px;font-weight:800;letter-spacing:1.5px;text-transform:uppercase;color:var(--navy);
  margin:26px 0 12px;border-left:4px solid var(--blue);padding-left:10px;}

/* ---- dark band ---- */
.band{background:var(--navy);color:#E8EEF7;}
.band h2{color:#fff;}
.band .lead{color:#B9CCE6;}

/* ---- forms ---- */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;}
.field label{font-size:13px;font-weight:700;color:var(--navy);}
.field input,.field select,.field textarea{border:1px solid var(--line);border-radius:9px;padding:12px 14px;
  font-family:var(--font);font-size:15px;background:#fff;}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid #BFD3F5;border-color:var(--blue);}
.radio-row{display:flex;gap:10px;flex-wrap:wrap;}
.radio-row label{border:1px solid var(--line);border-radius:9px;padding:9px 16px;cursor:pointer;font-weight:600;font-size:14px;}
.radio-row input{display:none;}
.radio-row input:checked+span{color:var(--blue);}

/* ---- footer ---- */
.footer{background:var(--navy);color:#93A9C6;font-size:13.5px;padding:56px 0 26px;}
.footer h4{color:#fff;font-size:14px;letter-spacing:1px;margin-bottom:14px;text-transform:uppercase;}
.footer a:hover{color:#fff;}
.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:28px;}
.footer .lic{font-size:12px;line-height:1.9;color:#7E93B0;}
.footer .bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:18px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12px;}

/* ---- misc ---- */
.pill{display:inline-block;font-size:12px;background:var(--soft2);color:var(--blue);border:1px solid #D5E2F7;
  border-radius:99px;padding:4px 12px;margin:3px 5px 3px 0;font-weight:700;}
.crumb{font-size:13px;color:var(--muted);margin-bottom:10px;}
.note{border-left:4px solid var(--gold);background:#FFF8E9;border-radius:8px;padding:14px 16px;}
.hidden{display:none;}

/* ---- anchors & solution detail sections ---- */
[id]{scroll-margin-top:92px;}
.solwrap{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;}
.solwrap .featimg{width:100%;height:300px;object-fit:cover;border-radius:var(--rad);box-shadow:var(--shadow);}
.solfeat{list-style:none;margin:18px 0 0;}
.solfeat li{display:flex;gap:10px;align-items:flex-start;padding:8px 0;font-size:15px;border-top:1px dashed var(--line);}
.solfeat li:first-child{border-top:0;}
.solfeat .tick{color:var(--blue);font-weight:800;}
.solpanel{background:var(--navy3);color:#DCE9FB;border-radius:var(--rad);padding:28px;box-shadow:var(--shadow);}
.solpanel h3{color:#fff;margin-bottom:10px;}
.solpanel p{color:#9FB4D4;font-size:14.5px;}

@media(max-width:1120px){
  .nav .wrap{gap:18px;}
  .nav-links{gap:15px;font-size:14px;}
}
@media(max-width:960px){
  .nav-links{display:none;}
  .nav-links .mcontact{display:block;}
  .nav-burger{display:block;}
  .nav-links.open{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;
    background:var(--navy);padding:16px 22px;gap:14px;border-bottom:1px solid rgba(255,255,255,.1);}
  .nav-links a.active::after{display:none;}
  .nav-links a.active{color:#7FD1FF;}
  .solwrap{grid-template-columns:1fr;gap:26px;}
  .solwrap .featimg{height:220px;}
}
@media(max-width:900px){
  .nav-links{display:none;}
  .nav-burger{display:block;}
  .g3,.g4{grid-template-columns:1fr 1fr;}
  .hero h1{font-size:38px;}
  .stats{gap:26px;}
  .logowall{grid-template-columns:repeat(3,1fr);}
  .footer .cols{grid-template-columns:1fr 1fr;}
}
@media(max-width:760px){
  .section{padding:46px 0;}
  .hero-in{padding:64px 18px 56px;}
  .hero h1{font-size:34px;}
  .hero .eyebrow{font-size:11.5px;letter-spacing:2px;}
  .hero p{font-size:16.5px;margin:14px auto 22px;}
  .hero .cta{gap:10px;flex-wrap:wrap;}
  .hero .cta .btn{justify-content:center;}
  .stats{gap:18px 30px;margin-top:30px;}
  .stats .s b{font-size:24px;}
  h2{font-size:27px;}
  .lead{font-size:16.5px;}
  .card{padding:20px;}
  .logowall{grid-template-columns:repeat(3,1fr) !important;gap:12px;}
  .logowall .lg{height:96px;padding:12px;}
  .logowall .lg img{max-height:56px;}
  .footer{padding:42px 0 22px;}
  .solwrap .featimg{height:210px;}
  .wrap{padding:0 18px;}
}
@media(max-width:560px){
  .g2,.g3,.g4{grid-template-columns:1fr;}
  .logowall{grid-template-columns:repeat(2,1fr) !important;}
  .nav .wrap{gap:10px;}
  .nav-logo img{height:44px;}
  .nav-right{gap:8px;}
  .nav-right .btn{display:none;}
}

/* ---- hero commercial / residential split ---- */
.hero-split{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;max-width:560px;margin:30px auto 0;text-align:left;}
.hero-split a{display:block;background:rgba(255,255,255,.07);border:1px solid rgba(127,209,255,.45);border-radius:14px;padding:18px 20px;color:#fff;transition:.18s;}
.hero-split a:hover{background:rgba(255,255,255,.14);border-color:var(--gold);transform:translateY(-2px);}
.hero-split .k{display:block;font-size:12px;letter-spacing:2px;text-transform:uppercase;color:#7FD1FF;font-weight:800;}
.hero-split .d{display:block;font-size:14.5px;color:#C6D6EC;margin-top:4px;}
.hero-split .go{display:inline-block;margin-top:10px;font-weight:800;color:var(--gold);}
.hero-split a.res{border-color:rgba(201,162,74,.55);}
.hero-split a.res .k{color:var(--gold);}

/* ============================================================
   HERO CAROUSEL (drag / swipe) — Residential / Commercial / Upgrade
   ============================================================ */
.hero.hc{background:#08142A;cursor:grab;touch-action:pan-y;}
.hero.hc.dragging{cursor:grabbing;}
.hc-view{position:absolute;inset:0;overflow:hidden;}
.hc-track{display:flex;height:100%;width:100%;transition:transform .8s cubic-bezier(.22,.61,.36,1);will-change:transform;}
.hc-track.dragging{transition:none;}
.hc-slide{position:relative;flex:0 0 100%;height:100%;background-size:cover;background-position:center;-webkit-user-drag:none;user-select:none;}
.hc-slide::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,14,30,.42),rgba(6,14,30,.86));pointer-events:none;}
.hero.hc .hero-in{position:relative;z-index:3;}
.hc-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:4;width:46px;height:46px;border-radius:50%;
  border:1px solid rgba(255,255,255,.35);background:rgba(8,20,42,.38);color:#fff;font-size:26px;line-height:1;
  cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.18s;padding:0;font-family:var(--font);}
.hc-arrow:hover{background:rgba(59,130,246,.9);border-color:transparent;}
.hc-arrow.prev{left:18px;}
.hc-arrow.next{right:18px;}
.hc-dots{position:absolute;left:0;right:0;bottom:20px;z-index:4;display:flex;gap:9px;justify-content:center;}
.hc-dots button{width:9px;height:9px;border-radius:50%;border:0;padding:0;cursor:pointer;background:rgba(255,255,255,.42);transition:.2s;}
.hc-dots button.on{background:#fff;width:26px;border-radius:6px;}
.hc-tag{position:absolute;left:0;right:0;bottom:44px;z-index:4;text-align:center;pointer-events:none;}
.hc-tag-item{display:none;font-size:12px;letter-spacing:2px;text-transform:uppercase;font-weight:800;color:#7FD1FF;
  background:rgba(8,20,42,.42);border:1px solid rgba(127,209,255,.35);border-radius:99px;padding:5px 14px;}
.hc-tag-item.on{display:inline-block;}
@media(max-width:760px){
  .hc-arrow{width:38px;height:38px;font-size:22px;}
  .hc-arrow.prev{left:8px;} .hc-arrow.next{right:8px;}
  .hc-dots{bottom:14px;}
  .hc-tag{bottom:36px;} .hc-tag-item{font-size:10.5px;}
}
@media (prefers-reduced-motion: reduce){ .hc-track{transition:none;} }