:root{
    --primary:#00a88f;
    --primary-dark:#007a66;
    --accent:#ff6b35;
    --accent-2:#f7c948;
    --ink:#0b1f3a;
    --muted:#5a6b7c;
    --line:#e3ebf3;
    --bg:#f5f8fb;
    --white:#fff;
    --radius:14px;
    --shadow:0 6px 28px rgba(11,31,58,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--primary-dark);text-decoration:none}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
.skip-link{position:absolute;left:-999px;top:0;background:var(--primary);color:#fff;padding:10px 16px;z-index:9999}
.skip-link:focus{left:10px;top:10px}

/* HEADER */
.site-header{background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.04)}
.header-inner{max-width:1240px;margin:0 auto;padding:0 24px;height:76px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{height:42px;width:auto}
.brand-mark{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,var(--primary),#00c9a7);color:#fff;font-size:24px;font-weight:800;display:flex;align-items:center;justify-content:center}
.brand-text{font-size:20px;font-weight:800;color:var(--ink);letter-spacing:.5px}
.main-nav{flex:1}
.main-nav>ul{display:flex;list-style:none;margin:0;padding:0;gap:4px}
.main-nav>ul>li{position:relative}
.main-nav>ul>li>a{display:block;padding:10px 14px;font-size:15px;font-weight:600;color:var(--ink);border-radius:8px;white-space:nowrap}
.main-nav>ul>li>a:hover,.main-nav>ul>li>a.active{color:var(--primary-dark);background:#e6f7f3}
.sub-menu{display:none;position:absolute;top:100%;left:0;background:var(--white);min-width:180px;border-radius:12px;box-shadow:var(--shadow);padding:8px;list-style:none;margin:0;border:1px solid var(--line)}
.has-sub:hover .sub-menu{display:block}
.sub-menu a{display:block;padding:10px 14px;border-radius:8px;font-size:14px;color:var(--ink)}
.sub-menu a:hover{background:#e6f7f3;color:var(--primary-dark)}
.header-actions{display:flex;gap:10px;flex-shrink:0}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border-radius:10px;font-size:14px;font-weight:700;border:2px solid transparent;cursor:pointer;transition:.2s;white-space:nowrap}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:#e55a2b;color:#fff}
.btn-outline{border-color:var(--primary);color:var(--primary-dark);background:#fff}
.btn-outline:hover{background:var(--primary);color:#fff}
.header-qq{max-width:1240px;margin:0 auto;padding:0 24px 8px;font-size:13px;color:var(--muted);text-align:right}
.nav-toggle{display:none;background:none;border:0;font-size:26px;cursor:pointer;color:var(--ink);margin-left:auto}

/* HERO */
.hero{background:linear-gradient(135deg,#0b1f3a 0%,#103b5c 50%,#0e5c5a 100%);color:#fff;padding:72px 24px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-80px;top:-80px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(0,201,167,.25),transparent 70%)}
.hero-inner{max-width:1240px;margin:0 auto;position:relative;z-index:1;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.hero h1{font-size:clamp(28px,4vw,46px);line-height:1.25;margin:0 0 16px;font-weight:800}
.hero h1 span{color:#4de8c2}
.hero p{font-size:17px;color:#c9d9e8;margin:0 0 28px;max-width:600px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.stat-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);border-radius:14px;padding:20px;backdrop-filter:blur(6px)}
.stat-card strong{display:block;font-size:26px;color:#4de8c2}
.stat-card span{font-size:13px;color:#b8cadb}

/* SECTIONS */
.section{padding:64px 24px}
.section-inner{max-width:1240px;margin:0 auto}
.section-head{text-align:center;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3vw,34px);margin:0 0 10px;font-weight:800}
.section-head p{color:var(--muted);margin:0;font-size:15px;max-width:640px;margin-left:auto;margin-right:auto}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--line);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 36px rgba(0,0,0,.1)}
.card .icon{width:52px;height:52px;border-radius:14px;background:#e6f7f3;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.card h3{font-size:18px;margin:0 0 8px}
.card p{font-size:14px;color:var(--muted);margin:0}

/* PRODUCTS */
.product-hero{background:linear-gradient(135deg,var(--primary) 0%,#00c9a7 100%);color:#fff;padding:56px 24px}
.product-hero h1{font-size:clamp(26px,3.5vw,38px);margin:0 0 10px}
.product-hero p{margin:0;color:rgba(255,255,255,.88);font-size:16px;max-width:720px}
.product-tabs{display:flex;flex-wrap:wrap;gap:10px;margin:32px 0}
.product-tabs a{padding:9px 18px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:14px;font-weight:600;color:var(--ink)}
.product-tabs a.active,.product-tabs a:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.table-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line)}
table.spec-table{width:100%;border-collapse:collapse;min-width:620px}
.spec-table th,.spec-table td{padding:13px 16px;text-align:left;font-size:14px;border-bottom:1px solid var(--line)}
.spec-table th{background:#f0f7f5;font-weight:700;color:var(--primary-dark);white-space:nowrap}
.spec-table tr:last-child td{border-bottom:0}
.spec-table tbody tr:hover{background:#fafffd}

/* NEWS */
.news-list{display:grid;gap:18px}
.news-item{display:grid;grid-template-columns:96px 1fr;gap:18px;background:#fff;border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);border:1px solid var(--line)}
.news-date{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;height:80px}
.news-date strong{font-size:26px;line-height:1}
.news-date span{font-size:12px;opacity:.85;margin-top:3px}
.news-item h3{margin:0 0 6px;font-size:17px}
.news-item h3 a{color:var(--ink)}
.news-item h3 a:hover{color:var(--primary-dark)}
.news-item p{margin:0;color:var(--muted);font-size:14px}
.article-body{background:#fff;border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);border:1px solid var(--line)}
.article-body h1{font-size:clamp(22px,3vw,30px);margin:0 0 10px;line-height:1.35}
.article-meta{color:var(--muted);font-size:13px;margin-bottom:24px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article-content{font-size:16px;line-height:1.9;color:#1f3346;word-break:break-word}
.article-content p{margin:0 0 1.1em}
.article-content img{max-width:100%;height:auto;border-radius:10px;margin:1em 0}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.contact-box{background:#fff;border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);border:1px solid var(--line)}
.contact-box h3{margin:0 0 18px;font-size:20px}
.contact-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
.contact-item:last-child{border-bottom:0}
.contact-item .ci{font-size:22px;width:30px;text-align:center}
.contact-item strong{display:block;font-size:14px;margin-bottom:2px}
.contact-item span{font-size:14px;color:var(--muted)}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.form-row input,.form-row textarea{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit}
.form-row textarea{min-height:110px;resize:vertical}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,168,143,.12)}

/* FOOTER */
.site-footer{background:var(--white);border-top:1px solid var(--line);margin-top:40px}
.footer-grid{max-width:1240px;margin:0 auto;padding:52px 24px 32px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-col h4{font-size:15px;margin:0 0 16px;color:var(--ink)}
.footer-col p{font-size:13px;color:var(--muted);margin:0;line-height:1.8}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{font-size:13px;color:var(--muted);margin-bottom:9px}
.footer-col li a{color:var(--muted)}
.footer-col li a:hover{color:var(--primary-dark)}
.footer-bottom{max-width:1240px;margin:0 auto;padding:20px 24px 32px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);text-align:center}
.risk-warn{margin-top:6px;color:#9a6b3a}

/* MOBILE FIXED BAR */
.mobile-fixed-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:2000;background:#fff;border-top:1px solid var(--line);padding:8px 12px calc(8px + env(safe-area-inset-bottom));gap:10px;box-shadow:0 -4px 20px rgba(0,0,0,.08)}
.m-btn{flex:1;text-align:center;padding:12px;border-radius:10px;font-size:15px;font-weight:700}
.m-open{background:var(--accent);color:#fff}
.m-login{background:#e6f7f3;color:var(--primary-dark)}

/* RESPONSIVE */
@media (max-width:1100px){
    .grid-4{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
    .header-inner{height:64px;gap:12px;flex-wrap:wrap;padding:0 16px}
    .nav-toggle{display:block}
    .main-nav{display:none;width:100%;order:10;padding-bottom:14px}
    .main-nav.open{display:block}
    .main-nav>ul{flex-direction:column;gap:2px}
    .main-nav>ul>li>a{padding:12px}
    .sub-menu{position:static;display:none;box-shadow:none;border:0;padding-left:14px;background:#f8fbfa}
    .has-sub.sub-open .sub-menu{display:block}
    .header-actions{display:none}
    .header-qq{text-align:left;padding:0 16px 10px}
    .hero-inner{grid-template-columns:1fr;gap:28px}
    .hero{padding:48px 18px}
    .hero-stats{grid-template-columns:repeat(2,1fr)}
    .grid-3{grid-template-columns:1fr}
    .contact-grid{grid-template-columns:1fr}
    .section{padding:44px 18px}
    .mobile-fixed-bar{display:flex}
    body{padding-bottom:76px}
    .news-item{grid-template-columns:72px 1fr;gap:12px;padding:14px}
    .news-date{height:68px}
    .news-date strong{font-size:22px}
    .article-body{padding:22px 18px}
    .footer-grid{grid-template-columns:1fr;gap:26px;padding:36px 18px 24px}
}
@media (max-width:520px){
    .grid-4{grid-template-columns:1fr}
    .hero-stats{grid-template-columns:1fr 1fr}
    .product-tabs a{padding:8px 13px;font-size:13px}
}