/* =========================================================
   SEMIVAC — Static Bilingual Website
   Design system inspired by reference corporate template
   ========================================================= */
:root{
  --navy:#152A42;
  --navy-2:#1E3A5F;
  --blue:#1E5FEE;
  --blue-dark:#1645B8;
  --blue-soft:#EAF3FC;
  --blue-soft-2:#DCEBF9;
  --blue-line:#D5E4F5;
  --green:#22C55E;
  --orange:#E55039;
  --success:#16A34A;
  --danger:#DC2626;
  --blue-grad:linear-gradient(180deg,#E8F2FC 0%,#FBFDFF 100%);
  --bg-soft:#F5F9FD;
  --bg-white:#ffffff;
  --line:#E2EAF3;
  --line-soft:#EDF2F8;
  --text:#152A42;
  --text-2:#44566E;
  --text-3:#6B7C93;
  --shadow-sm:0 1px 2px rgba(21,42,66,.05),0 6px 20px rgba(21,42,66,.05);
  --shadow-md:0 2px 6px rgba(21,42,66,.06),0 18px 40px rgba(21,42,66,.10);
  --radius:16px;
  --radius-lg:24px;
  --container:1180px;
  --font:-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg-white);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 28px}

/* Language visibility — default English */
html:not(.zh) .lang-zh{display:none!important}
html.zh .lang-en{display:none!important}

/* ---------- Typography ---------- */
h1,h2,h3,h4{color:var(--navy);font-weight:700;line-height:1.3}
.h-sec{font-size:32px;margin:14px 0 16px;letter-spacing:.3px}
.h-sec-sub{font-size:17px;color:var(--text-2);max-width:600px;margin:0 auto 10px}
.sec-tag{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--blue);letter-spacing:2.5px;text-transform:uppercase}
.sec-tag::before{content:"";width:22px;height:2px;background:var(--blue);border-radius:2px}
p{color:var(--text-2)}
.lead{font-size:18px;color:var(--text-2)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dark);transform:translateY(-1px)}
.btn-outline{border-color:rgba(255,255,255,.65);color:#fff;background:rgba(255,255,255,.06)}
.btn-outline:hover{background:#fff;color:var(--navy)}
.btn-ghost{border-color:var(--line);color:var(--navy);background:#fff}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-lg{padding:14px 30px;font-size:16px}
.btn .arr{transition:transform .2s ease}
.btn:hover .arr{transform:translateX(4px)}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.88);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-soft);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:var(--navy);letter-spacing:.5px}
.logo-mark{width:34px;height:34px;border-radius:0;background:url('../img/logo-mark.png') center/contain no-repeat;display:flex;align-items:center;justify-content:center;color:transparent;font-size:0}
.logo-text{font-size:21px;font-weight:800;color:var(--navy);letter-spacing:1px;line-height:1;white-space:nowrap}
.logo small{display:block;font-size:10.5px;font-weight:600;color:var(--text-3);letter-spacing:1.6px;margin-top:-2px}
.logo-img{max-height:34px;width:auto;display:block}
.f-logo-img{max-height:30px;width:auto;display:block}
.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:nowrap}
.main-nav a.nav-link{padding:8px 12px;border-radius:999px;font-size:14px;font-weight:500;color:var(--text-2);white-space:nowrap;transition:all .15s ease}
.main-nav a.nav-link:hover{color:var(--navy);background:var(--bg-soft)}
.main-nav a.nav-link.active{color:var(--blue-dark);background:var(--blue-soft);font-weight:600;box-shadow:inset 0 0 0 1px rgba(30,95,238,.16)}
.main-nav .nav-item{position:relative}
.main-nav .nav-item.has-sub .nav-link{display:inline-flex;align-items:center;gap:5px}
.main-nav .nav-item .caret{font-size:11px;opacity:.7}
.main-nav .dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%);min-width:236px;background:#fff;border:1px solid var(--line-soft);border-radius:16px;box-shadow:var(--shadow-md);padding:10px;opacity:0;visibility:hidden;transition:opacity .18s ease,visibility .18s ease;z-index:60}
.main-nav .dropdown.multi{display:grid;grid-template-columns:repeat(3,1fr);gap:2px 16px;width:min(720px,92vw);padding:14px 16px}
.main-nav .dropdown.multi .dropdown-group + .dropdown-group{margin-top:0;border-left:1px solid var(--line-soft)}
.main-nav .nav-item.has-sub:hover .dropdown,
.main-nav .nav-item.has-sub:focus-within .dropdown,
.main-nav .nav-item.has-sub.open .dropdown{opacity:1;visibility:visible}
.main-nav .nav-item.has-sub.open > .nav-link{color:var(--blue-dark);background:var(--blue-soft);font-weight:600;box-shadow:inset 0 0 0 1px rgba(30,95,238,.16)}
.main-nav .dropdown-link{display:block;padding:9px 12px;border-radius:10px;font-size:13.5px;color:var(--text-2);white-space:nowrap;transition:all .15s ease}
.main-nav .dropdown-link:hover{color:var(--navy);background:var(--bg-soft)}
.main-nav .dropdown-link.active{color:var(--blue-dark);background:var(--blue-soft);font-weight:600;box-shadow:inset 0 0 0 1px rgba(30,95,238,.16)}
.main-nav .dropdown-all{display:flex;align-items:center;justify-content:space-between;margin-top:8px;padding:8px 10px;font-size:12.5px;font-weight:700;color:var(--blue);letter-spacing:.4px;border-top:1px dashed var(--line);white-space:nowrap}
.main-nav .dropdown-all:hover{color:var(--blue-dark);background:var(--bg-soft)}
.main-nav .dropdown-all .arr{transition:transform .2s ease}
.main-nav .dropdown-all:hover .arr{transform:translateX(4px)}
.main-nav .dropdown-group + .dropdown-group{margin-top:4px}
.main-nav .dropdown-title{font-size:11px;letter-spacing:1.2px;text-transform:uppercase;color:var(--text-3);padding:8px 12px 4px}
.header-actions{display:flex;align-items:center;gap:10px}
.lang-toggle{
  display:inline-flex;align-items:center;gap:2px;border:1px solid var(--line);border-radius:999px;padding:4px;background:#fff;
}
.lang-toggle button{border:0;background:transparent;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:600;color:var(--text-3);cursor:pointer;transition:all .15s ease;font-family:var(--font)}
.lang-toggle button.on{background:var(--navy);color:#fff}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{width:22px;height:2px;background:var(--navy);border-radius:2px;transition:all .2s ease}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Mobile nav */
.mobile-nav{
  display:none;position:fixed;left:0;right:0;top:72px;z-index:99;background:#fff;
  padding:18px 24px 22px;border-top:1px solid var(--line-soft);box-shadow:var(--shadow-md);
}
.mobile-nav.open{display:flex;flex-direction:column;gap:12px;max-height:calc(100vh - 72px);overflow:auto}
.mobile-nav a.mnav-link{display:inline-flex;align-items:center;padding:8px 16px;border-radius:999px;font-size:15px;font-weight:600;color:var(--navy);background:var(--bg-soft);transition:all .15s ease}
.mobile-nav a.mnav-link:hover{color:var(--blue);background:var(--blue-soft)}
.mobile-nav > a.mnav-link{align-self:flex-start}
.mobile-nav .mnav-group{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.mobile-nav .mnav-head{display:inline-flex;align-items:center;background:var(--bg-soft);border-radius:999px;overflow:hidden;transition:background .15s ease}
.mobile-nav .mnav-head:hover{background:var(--blue-soft)}
.mobile-nav .mnav-head .mnav-link{background:transparent;color:var(--navy);padding-right:2px}
.mobile-nav .mnav-head .mnav-link:hover{color:var(--blue)}
.mobile-nav .mnav-head .mnav-toggle{background:transparent;border:0;color:var(--navy);cursor:pointer;padding:8px 14px 8px 4px;font-size:12px;line-height:1;opacity:.85;transition:transform .2s ease,opacity .15s ease}
.mobile-nav .mnav-head .mnav-toggle:hover{opacity:1;color:var(--blue)}
.mobile-nav .mnav-head .mnav-toggle .caret{font-size:11px;opacity:.8}
.mobile-nav .mnav-group.open .mnav-toggle{transform:rotate(180deg)}
.mobile-nav .mnav-sub{display:none;flex-wrap:wrap;gap:8px;flex-basis:100%;padding-left:10px}
.mobile-nav .mnav-group.open .mnav-sub{display:flex}
.mobile-nav .mnav-sub-title{width:100%;font-size:12px;letter-spacing:1px;color:var(--text-3);margin-top:4px}
.mobile-nav a.mnav-link.sub{font-size:13.5px;font-weight:500}
.mobile-nav a.mnav-link.active{color:var(--blue-dark);background:var(--blue-soft);font-weight:700;box-shadow:inset 0 0 0 1px rgba(30,95,238,.16)}
.mobile-nav a.mnav-link.active:hover{color:var(--blue);background:var(--blue-soft-2)}
.mobile-nav .mnav-head.active{background:var(--blue-soft);box-shadow:inset 0 0 0 1px rgba(30,95,238,.16)}
.mobile-nav .mnav-head.active:hover{background:var(--blue-soft-2)}
.mobile-nav .mnav-head.active .mnav-link,
.mobile-nav .mnav-head.active .mnav-toggle{color:var(--blue-dark)}
.mobile-nav .mnav-head.active .mnav-link:hover,
.mobile-nav .mnav-head.active .mnav-toggle:hover{color:var(--blue)}
.mobile-nav .mnav-head.active .mnav-toggle{opacity:1}

/* ---------- Hero ---------- */
.hero{background:var(--blue-grad);position:relative;overflow:hidden}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(600px 300px at 85% 20%,rgba(30,95,238,.08),transparent 60%),
    radial-gradient(500px 300px at 10% 90%,rgba(79,139,255,.10),transparent 60%);
}
.hero-inner{position:relative;z-index:1;padding:96px 0 84px;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero h1{font-size:46px;line-height:1.22;letter-spacing:.3px;margin:18px 0 20px}
.hero .hero-sub{font-size:18px;color:var(--text-2);max-width:560px}
.hero-actions{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.hero .btn-primary{box-shadow:0 10px 26px rgba(30,95,238,.28)}
.hero .btn-outline{border-color:var(--blue);color:var(--blue)}
.hero .btn-outline:hover{background:var(--blue);color:#fff}
.hero-figure{position:relative}
.hero-img-wrap{
  border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);
  background:#fff;border:1px solid var(--line-soft);
}
.hero-img-wrap img{width:100%;height:auto;object-fit:cover}
.hero-chip{
  position:absolute;left:-18px;bottom:26px;background:#fff;border:1px solid var(--line-soft);
  border-radius:14px;padding:14px 18px;box-shadow:var(--shadow-md);display:flex;gap:12px;align-items:center;
}
.hero-chip .dot{width:10px;height:10px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(34,197,94,.15)}
.hero-chip b{display:block;font-size:14px;color:var(--navy)}
.hero-chip span{font-size:12px;color:var(--text-3)}

/* ---------- Sections ---------- */
.section{padding:80px 0}
.section.alt{background:var(--bg-soft)}
.section.hairline{border-top:1px solid var(--line-soft)}
.section-head{text-align:center;max-width:740px;margin:0 auto 48px}
.section-head.left{text-align:left;margin:0 0 40px}
.grid{display:grid;gap:24px}
.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* Value / stat cards */
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px}
.stat{padding:6px 0;border-left:2px solid var(--line);padding-left:18px}
.stat b{display:block;font-size:28px;color:var(--navy)}
.stat span{font-size:13.5px;color:var(--text-3)}

/* Value cards */
.value-card{background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius);padding:30px 26px;transition:all .25s ease}
.value-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);border-color:var(--blue-line)}
.value-card .ic{
  width:52px;height:52px;border-radius:14px;background:var(--blue-soft);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px;
}
.value-card h3{font-size:17px;margin-bottom:10px}
.value-card p{font-size:14.5px}
.read-more{display:none;margin-top:8px;padding:0;border:0;background:none;color:var(--blue);font-size:14px;font-weight:600;cursor:pointer;font-family:inherit}
/* category tabs (products page overview) */
.cat-tab{cursor:pointer;user-select:none;transition:box-shadow .15s ease,transform .15s ease,border-color .15s ease}
.cat-tab:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);border-color:var(--blue)}
.cat-tab.active{border-color:var(--blue);background:var(--blue-soft);box-shadow:var(--shadow-sm)}
.cat-tab.active .ic{background:var(--blue);color:#fff}
.cat-tab.active h3{color:var(--blue)}

/* Product cards */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;scroll-margin-top:96px}
.product-card{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius);overflow:hidden;
  display:flex;flex-direction:column;transition:all .25s ease;
}
.product-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px);border-color:var(--blue-line)}
.product-card .thumb{aspect-ratio:4/3;overflow:hidden;background:var(--blue-grad);position:relative}
.product-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.product-card:hover .thumb img{transform:scale(1.05)}
.product-card .body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.product-card .cat{font-size:12px;font-weight:700;color:var(--blue);letter-spacing:1.5px;text-transform:uppercase;margin-bottom:8px}
.product-card h3{font-size:18px;margin-bottom:8px}
.product-card p{font-size:14px;flex:1}
.product-card .more{margin-top:16px;font-size:14px;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:6px}
.product-card .more .arr{transition:transform .2s ease}
.product-card:hover .more .arr{transform:translateX(4px)}


/* Chip lists */
.chip-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.chip{
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 20px;
  font-size:14px;font-weight:600;color:var(--navy);transition:all .2s ease;display:inline-flex;align-items:center;gap:8px;
}
.chip:hover{border-color:var(--blue);color:var(--blue);box-shadow:var(--shadow-sm)}
.chip .n{color:var(--blue);font-weight:700}

/* Two-col info rows */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split.flip .split-a{order:2}
.split-img{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line-soft);box-shadow:var(--shadow-sm)}
.split-img img{width:100%;height:100%;object-fit:cover}
.split h3{font-size:22px;margin:12px 0 14px}
.split p{max-width:620px}
.split h2{max-width:640px}
.check-list li{display:flex;gap:12px;align-items:flex-start;margin-bottom:12px;font-size:15px;color:var(--text-2)}
.check-list .ck{
  flex:0 0 22px;height:22px;border-radius:50%;background:var(--blue-soft);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;margin-top:3px;
}


/* ---------- Process stages ---------- */
.process{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;align-items:start}
.process-stage{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius-lg);
  padding:30px 28px;box-shadow:var(--shadow-sm);transition:box-shadow .25s ease,transform .25s ease;
}
.process-stage:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.stage-head{display:flex;gap:16px;align-items:flex-start;padding-bottom:20px;margin-bottom:22px;border-bottom:1px solid var(--line-soft)}
.stage-num{
  flex:0 0 52px;height:52px;border-radius:14px;background:var(--blue-soft);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:800;letter-spacing:.5px;
}
.stage-titles h3{font-size:18px;line-height:1.3;margin-bottom:4px}
.stage-titles p{font-size:13px;color:var(--text-3)}
.stage-steps li{display:flex;gap:13px;align-items:flex-start;margin-bottom:16px}
.stage-steps li:last-child{margin-bottom:0}
.step-no{
  flex:0 0 26px;height:26px;border-radius:50%;background:var(--blue-soft);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-top:2px;
}
.step-text b{display:block;font-size:15px;margin-bottom:2px;color:var(--navy)}
.step-text p{font-size:13.5px;color:var(--text-2);line-height:1.65}
/* Quote band */
.quote-band{
  background:linear-gradient(135deg,#162C46 0%,#1E3A5F 100%);
  color:#E8F0FA;padding:76px 0;position:relative;overflow:hidden;border-top:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08);
}
.quote-band::after{content:"";position:absolute;inset:0;background:radial-gradient(520px 260px at 88% 30%,rgba(94,146,255,.20),transparent 60%);pointer-events:none}
.quote-band .container{position:relative;z-index:1}
.quote-band h2{color:#fff;font-size:34px;margin-bottom:16px;max-width:760px;line-height:1.35}
.quote-band p{color:#C9D7EA;max-width:620px}
.quote-band .btn-primary{background:var(--blue);color:#fff}
.quote-band .btn-primary:hover{background:#3A76F5}
.quote-band .btn-outline{border-color:rgba(255,255,255,.55);color:#fff}
.quote-band .btn-outline:hover{background:#fff;color:var(--navy)}

/* ---------- Tables ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line-soft);border-radius:var(--radius);background:#fff}
.spec-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:640px}
.spec-table th,.spec-table td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line-soft);vertical-align:top}
.spec-table thead th{background:var(--navy);color:#fff;font-weight:600;font-size:13.5px;letter-spacing:.4px}
.spec-table thead th:first-child{border-radius:0}
.spec-table tbody tr:nth-child(even){background:var(--bg-soft)}
.spec-table tbody th{font-weight:600;color:var(--navy);background:var(--bg-soft);width:190px}
.spec-table tr:last-child td,.spec-table tr:last-child th{border-bottom:0}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{background:var(--blue-grad);border-bottom:1px solid var(--line-soft);position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(520px 260px at 85% 10%,rgba(30,95,238,.10),transparent 60%);pointer-events:none}
.page-hero .container{position:relative;z-index:1;padding:64px 28px 58px}
.page-hero h1{font-size:36px;margin:12px 0 14px}
.page-hero p{max-width:640px}
.breadcrumb{font-size:13px;color:var(--text-3);margin-bottom:6px}
.breadcrumb a{color:var(--blue)}

/* ---------- Article ---------- */
.article{max-width:820px;margin:0 auto}
.article h2{font-size:24px;margin:40px 0 14px}
.article h3{font-size:19px;margin:28px 0 10px}
.article p{margin-bottom:16px}
.article ul{margin:0 0 18px;padding-left:4px}
.article ul li{position:relative;padding-left:22px;margin-bottom:8px;color:var(--text-2)}
.article ul li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;background:var(--blue)}
.article .callout{background:var(--blue-soft);border-left:3px solid var(--blue);padding:18px 22px;border-radius:0 12px 12px 0;margin:24px 0}
.article .callout p{color:var(--navy)}
.article img.article-cover{display:block;margin:26px auto;max-width:100%;height:auto;border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}
.article-meta{display:flex;gap:18px;font-size:13.5px;color:var(--text-3);margin-bottom:8px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.contact-info h3{font-size:18px;margin:26px 0 12px}
.contact-info li{display:flex;gap:14px;margin-bottom:16px;align-items:flex-start}
.contact-info .ic{
  flex:0 0 42px;height:42px;border-radius:12px;background:var(--blue-soft);color:var(--blue);
  display:flex;align-items:center;justify-content:center;font-size:18px;
}
.contact-info b{display:block;font-size:14px;color:var(--navy)}
.contact-info span{font-size:14.5px;line-height:1.65;color:var(--text-2);overflow-wrap:break-word;word-break:normal}
.contact-info a{color:var(--blue);font-weight:600;text-decoration:none}
.contact-info a:hover{text-decoration:underline}
.contact-form{
  background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius-lg);
  padding:34px 32px;box-shadow:var(--shadow-sm);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--navy);margin-bottom:7px}
.field input,.field textarea,.field select{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;
  font-family:var(--font);color:var(--navy);background:#fff;transition:border .15s ease,box-shadow .15s ease;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(30,95,238,.12)}
.field textarea{min-height:120px;resize:vertical}
.form-note{font-size:12.5px;color:var(--text-3);margin-top:10px}
.form-msg{margin-top:14px;font-size:14px;font-weight:600}
.form-msg.ok{color:var(--success)}
.form-msg.err{color:var(--danger)}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-soft);color:var(--text-2);margin-top:0;border-top:1px solid var(--line-soft)}
.footer-top{display:grid;grid-template-columns:1.15fr 3fr 1fr;gap:36px;padding:64px 0 48px}
.site-footer h4{color:var(--navy);font-size:15.5px;margin-bottom:18px}
.site-footer .f-logo{font-size:22px;font-weight:800;color:var(--navy);display:flex;align-items:center;gap:10px;margin-bottom:16px}
.site-footer .f-about{font-size:14px;line-height:1.9;max-width:300px}
.footer-cats{display:grid;grid-template-columns:repeat(4,1fr);gap:26px 28px;align-items:start}
.footer-cat h4{margin-bottom:14px}
.footer-more{margin-top:6px}
.footer-more a{color:var(--blue);font-weight:600}
.footer-more a .arr{transition:transform .15s ease}
.footer-more a:hover .arr{transform:translateX(3px)}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .15s ease}
.footer-links a:hover{color:var(--blue)}
.footer-contact li{display:flex;gap:10px;margin-bottom:12px;font-size:14px;align-items:flex-start}
.footer-contact .ic{color:var(--blue);flex:0 0 18px;margin-top:3px;text-align:center}
.footer-contact a{color:var(--text-2)}
.footer-contact a:hover{color:var(--blue)}

/* ---------- Mobile nav CTA ---------- */
.mnav-cta{display:block;text-align:center;background:var(--blue);color:#fff;border-radius:999px;padding:12px 20px;font-size:15px;font-weight:700;margin-bottom:6px}
.mnav-cta:hover{background:var(--blue-dark);color:#fff}

/* ---------- Floating WhatsApp + back-to-top ---------- */
.site-floats{position:fixed;right:20px;bottom:20px;z-index:200;display:flex;flex-direction:column;gap:12px;align-items:center}
.float-btn{width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(21,42,66,.18);transition:transform .2s ease,box-shadow .2s ease;border:0;cursor:pointer}
.float-btn:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(21,42,66,.24)}
.float-wa{background:#25D366;color:#fff}
.float-cs{position:relative;background:linear-gradient(135deg,var(--blue) 0%,#22d3ee 100%);color:#fff;box-shadow:0 0 18px rgba(34,211,238,.45)}
.float-cs::after{content:"";position:absolute;inset:-4px;border-radius:50%;border:2px solid rgba(34,211,238,.55);animation:cs-pulse 2.2s ease-out infinite}
@keyframes cs-pulse{0%{transform:scale(.92);opacity:1}70%{transform:scale(1.22);opacity:0}100%{transform:scale(1.22);opacity:0}}
.to-top{background:var(--navy);color:#fff;font-size:20px;line-height:1;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .25s ease,visibility .25s ease,transform .25s ease}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
@media (max-width:640px){
  .site-floats{right:14px;bottom:14px;gap:10px}
  .float-btn{width:48px;height:48px}
}
/* ---------- Floating quick-inquiry modal ---------- */
.inquiry-modal{position:fixed;inset:0;z-index:400;display:none;align-items:center;justify-content:center;padding:20px}
.inquiry-modal.open{display:flex}
.inquiry-overlay{position:absolute;inset:0;background:rgba(15,30,50,.55);backdrop-filter:blur(2px)}
.inquiry-box{position:relative;background:#fff;border-radius:20px;box-shadow:0 18px 50px rgba(15,30,50,.28);width:100%;max-width:440px;padding:30px 28px;max-height:90vh;overflow:auto}
.inquiry-close{position:absolute;top:12px;right:16px;background:none;border:0;font-size:28px;line-height:1;color:var(--text-3);cursor:pointer;transition:color .15s ease}
.inquiry-close:hover{color:var(--blue)}
.inquiry-box h3{color:var(--navy);font-size:20px;margin-bottom:4px}
.inquiry-sub{font-size:13.5px;color:var(--text-3);margin:0 0 18px}
.inquiry-box input,.inquiry-box textarea,.inquiry-box select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;margin-bottom:12px;background:#fff;color:var(--text-2);box-sizing:border-box;font-family:inherit}
.inquiry-box input:focus,.inquiry-box textarea:focus,.inquiry-box select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px var(--blue-soft)}
.inquiry-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.inquiry-row input{margin-bottom:12px}
.inquiry-box textarea{min-height:90px;resize:vertical}
.inquiry-note{font-size:12.5px;color:var(--text-3);margin:12px 0 0;line-height:1.6}
.inquiry-box .btn{width:100%;justify-content:center;border:0;cursor:pointer}
.inquiry-msg{font-size:14px;margin:12px 0 0;display:none}
.inquiry-msg.ok{display:block;color:#16a34a}
.inquiry-msg.err{display:block;color:#dc2626}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0;font-size:13px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer-bottom a{color:var(--text-3)}
.footer-bottom a:hover{color:var(--blue)}
.footer-links-row{display:inline-flex;gap:18px;flex-wrap:wrap}
.value-card.cat-link{display:block;text-decoration:none;color:inherit}
.value-card.cat-link h3{color:var(--navy)}
.service-region-map{height:520px;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-md);margin-top:26px}
.footer-region .footer-map{height:220px;border-radius:14px;overflow:hidden;margin-top:2px}

.service-links{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.service-links a{font-size:14.5px;font-weight:600;color:var(--blue);transition:color .15s ease}
.service-links a:hover{color:var(--blue-dark)}
.service-links .arr{display:inline-block;transition:transform .2s ease}
.service-links a:hover .arr{transform:translateX(4px)}
/* ---------- CTA strip ---------- */
.service-region-card{background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-sm)}
.service-region-card h3{font-size:20px;margin-bottom:10px;color:var(--navy)}
.service-region-card p{font-size:14.5px;color:var(--text-2);margin-bottom:4px}
.service-region-img{width:100%;height:auto;border-radius:14px;margin-top:18px;border:1px solid var(--line-soft);box-shadow:var(--shadow-sm)}
.service-region-card .service-region-map{height:480px;margin-top:22px}
.map-legend{display:flex;gap:18px;flex-wrap:wrap;margin-top:14px}
.map-legend span{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--text-3)}
.map-legend .dot{width:10px;height:10px;border-radius:50%;display:inline-block}
.map-legend .dot.center{background:var(--blue);box-shadow:0 0 0 3px rgba(46,107,255,.15)}
.map-legend .dot.target{background:var(--orange);box-shadow:0 0 0 3px rgba(229,80,57,.15)}
.cta-strip{background:var(--blue-grad);border-top:1px solid var(--line-soft);padding:56px 0}
.cta-strip .inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-strip h2{font-size:26px;margin-bottom:6px}
.cta-strip p{max-width:620px}

/* ---------- Responsive ---------- */
/* Medium screens: switch to hamburger before the menu gets crowded */
@media (max-width:1200px){
  .main-nav{display:none}
  .hamburger{display:flex}
}
@media (max-width:1024px){
  .main-nav{display:none}
  .hamburger{display:flex}
  .hero-inner{grid-template-columns:1fr;padding:64px 0;gap:40px}
  .hero h1{font-size:36px}
  .hero-figure{max-width:560px}
  .process{grid-template-columns:1fr}
  .product-grid{grid-template-columns:repeat(2,1fr)}
  .grid{grid-template-columns:repeat(2,1fr)!important}
  .split{grid-template-columns:1fr;gap:36px}
  .split.flip .split-a{order:0}
  .stats-row{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr;gap:36px}
  .footer-cats{grid-column:1/-1;grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .h-sec{font-size:26px}
}
@media (max-width:640px){
  .value-grid{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr!important}
  .clamp-text{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
  .clamp-text.is-open{display:block;-webkit-line-clamp:unset}
  .read-more{display:inline-block}
  .container{padding:0 20px}
  .section{padding:60px 0}
  .hero h1{font-size:25px;line-height:1.32;margin:12px 0 10px}
  .hero-inner{padding:30px 0 40px;gap:28px}
  .process-stage{padding:24px 20px}
  .stage-num{flex:0 0 44px;height:44px;font-size:16px;border-radius:12px}
  .hero .sec-tag{font-size:11px;letter-spacing:2px}
  .hero .sec-tag::before{width:16px}
  .hero .hero-sub{font-size:15px;line-height:1.7}
  .hero-actions{margin-top:20px;gap:10px}
  .hero-actions .btn-lg{padding:11px 20px;font-size:14px}
  .hero-figure{max-width:330px;margin:0 auto}
  .hero-img-wrap{transform:none;border-radius:16px}
  .hero-chip{left:10px;bottom:12px;padding:10px 14px;gap:10px;border-radius:12px}
  .hero-chip b{font-size:12px}
  .hero-chip span{font-size:11px}
  .product-grid{grid-template-columns:1fr}
  .stats-row{grid-template-columns:1fr 1fr;gap:14px}
  .form-row{grid-template-columns:1fr}
  .contact-form{padding:26px 20px}
  .footer-top{grid-template-columns:1fr}
  .footer-cats{grid-template-columns:1fr}
  .service-region-map{height:360px}
  .service-region-card .service-region-map{height:360px}
  .footer-region .footer-map{height:200px}
  .page-hero h1{font-size:30px}
  .quote-band h2{font-size:26px}
  .header-actions .btn{display:none}
}

.empty-products{color:var(--text-3);text-align:center;padding:48px 0;grid-column:1/-1}

/* ===== contact info block (联系信息卡片) ===== */
.contact-info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px}
.contact-info-card{background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-sm);display:flex;gap:14px;align-items:flex-start}
.contact-info-card .ic{font-size:22px;line-height:1;color:var(--blue);margin-top:2px}
.contact-info-card .lbl{font-size:13px;color:var(--text-2);margin-bottom:4px;text-transform:uppercase;letter-spacing:.4px}
.contact-info-card .val{font-size:15px;color:var(--navy);font-weight:600;word-break:break-word}
.contact-info-card a.val{color:var(--blue);text-decoration:none}
.contact-info-card a.val:hover{text-decoration:underline}
@media (max-width:720px){.contact-info-grid{grid-template-columns:1fr}}

/* ===== technical article helpers ===== */
.article .standfirst{font-size:18px;color:var(--text-2);font-weight:600;margin-bottom:18px}
.article .article-tagline{background:#f5f8fc;border-left:3px solid var(--blue);padding:14px 16px;border-radius:0 8px 8px 0;color:var(--navy);font-size:16px;margin-top:8px}