:root{--ink:#0c1b2e;--navy:#0a2a4a;--navy2:#0e3a6b;--blue:#1766c4;--sky:#eaf2fc;--cyan:#0fa3b1;--amber:#f59e0b;--line:#dbe4ee;--mut:#5b6b7e;--bg:#f5f8fc;--card:#fff;--rad:14px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 20px}

/* header */
.top{background:var(--navy);color:#cfe0f5;font-size:13px}
.top .wrap{display:flex;justify-content:space-between;gap:12px;padding-top:7px;padding-bottom:7px;flex-wrap:wrap}
.top a{color:#fff;font-weight:600}
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:11px;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand svg{width:42px;height:42px;flex:none}
.brand b{display:block;font-size:19px;line-height:1.15;letter-spacing:.5px}
.brand small{display:block;font-size:11px;color:var(--mut);letter-spacing:1.5px}
nav.main{display:flex;gap:4px;align-items:center}
nav.main a{color:var(--ink);padding:8px 14px;border-radius:8px;font-size:15px;font-weight:500}
nav.main a:hover,nav.main a.on{background:var(--sky);color:var(--blue);text-decoration:none}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-weight:700;font-size:15px;border:0;cursor:pointer;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff}
.btn:hover{text-decoration:none;filter:brightness(1.07)}
.btn.line{background:transparent;border:1.5px solid rgba(255,255,255,.7);color:#fff}
.btn.line.dark{border-color:var(--blue);color:var(--blue)}
.btn.amber{background:linear-gradient(135deg,#f59e0b,#f97316)}
.burger{display:none;background:none;border:0;font-size:26px;cursor:pointer;color:var(--ink)}

/* hero */
.hero{position:relative;overflow:hidden;color:#fff;background:linear-gradient(135deg,#071a31 0%,#0e3a6b 58%,#0b6a91 100%)}
.hero::before{content:"";position:absolute;inset:0;opacity:.18;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='112' height='194'%3E%3Cg fill='none' stroke='%23ffffff' stroke-width='1.2'%3E%3Cpath d='M56 2l54 31v62L56 126 2 95V33z'/%3E%3Cpath d='M56 126v62M2 95l-0 0M110 95l0 0'/%3E%3C/g%3E%3C/svg%3E");background-size:112px 194px}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.25fr .9fr;gap:44px;align-items:center;padding-top:72px;padding-bottom:72px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;color:#8fd8e0;border:1px solid rgba(143,216,224,.5);padding:3px 12px;border-radius:99px;margin-bottom:18px}
.hero h1{font-size:clamp(30px,4.6vw,50px);line-height:1.22;font-weight:800;letter-spacing:.5px}
.hero h1 em{font-style:normal;color:#7fe0ea}
.hero p.lead{margin:20px 0 28px;color:#cfe0f5;font-size:17.5px;max-width:620px}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.glass{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:18px;padding:22px 24px;backdrop-filter:blur(8px)}
.glass h2{font-size:15px;letter-spacing:2px;color:#8fd8e0;font-weight:600;margin-bottom:10px}
.glass table{width:100%;border-collapse:collapse;font-size:14.5px}
.glass td,.glass th{padding:8px 4px;border-bottom:1px solid rgba(255,255,255,.15);text-align:left}
.glass th{font-weight:600;color:#fff}
.glass td{color:#cfe0f5}
.glass tr:last-child td,.glass tr:last-child th{border:0}

/* stats */
.stats{background:#fff;border-bottom:1px solid var(--line)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:26px 10px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border:0}
.stat b{display:block;font-size:34px;color:var(--blue);line-height:1.1}
.stat span{font-size:14px;color:var(--mut)}

/* sections */
section.blk{padding:76px 0}
section.blk.alt{background:#fff}
.sh{max-width:760px;margin:0 0 38px}
.sh .tag{font-size:13px;letter-spacing:3px;color:var(--cyan);font-weight:700}
.sh h2{font-size:clamp(25px,3.2vw,34px);line-height:1.3;margin:6px 0 10px}
.sh p{color:var(--mut)}
.grid{display:grid;gap:20px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(10,42,74,.12);border-color:#b9cfe8}
.card .pic{aspect-ratio:4/3;background:var(--sky);overflow:hidden}
.card .pic img{width:100%;height:100%;object-fit:cover}
.card .bd{padding:18px 20px 22px;display:flex;flex-direction:column;gap:6px;flex:1}
.card h3{font-size:18px;line-height:1.4}
.card h3 a{color:var(--ink)}
.card p{color:var(--mut);font-size:14.5px}
.card .more{margin-top:auto;padding-top:8px;font-weight:600;font-size:14px}
.ico{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:grid;place-items:center;color:#fff;font-size:22px;margin-bottom:6px}
.card.pad{padding:24px}
.badge{display:inline-block;font-size:12px;background:var(--sky);color:var(--blue);padding:2px 10px;border-radius:99px;font-weight:600;width:fit-content}

/* compare table / specs */
.tbl{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:15px}
.tbl caption{caption-side:top;text-align:left;font-weight:700;padding:0 0 10px;font-size:16px}
.tbl th,.tbl td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.tbl thead th{background:var(--navy);color:#fff;font-weight:600}
.tbl tbody th{background:var(--sky);width:28%;font-weight:600}
.tbl tr:last-child th,.tbl tr:last-child td{border-bottom:0}
.scroll{overflow-x:auto;margin:10px 0 24px}

/* steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--rad);padding:22px;position:relative}
.step::before{counter-increment:s;content:"0" counter(s);font-size:32px;font-weight:800;color:#c9dcf3;display:block;line-height:1;margin-bottom:8px}
.step h3{font-size:17px;margin-bottom:4px}
.step p{font-size:14.5px;color:var(--mut)}

/* answer box (GEO) */
.answer{background:linear-gradient(135deg,#eef6ff,#e6f8fa);border-left:5px solid var(--cyan);border-radius:12px;padding:18px 22px;margin:0 0 28px}
.answer b{color:var(--navy)}
.answer .k{font-size:12px;letter-spacing:2px;color:var(--cyan);font-weight:700;display:block;margin-bottom:4px}

/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;padding:0 20px}
details[open]{border-color:#b9cfe8;box-shadow:0 6px 18px rgba(10,42,74,.07)}
summary{cursor:pointer;padding:16px 0;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:14px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--blue);font-size:22px;line-height:1}
details[open] summary::after{content:"−"}
details .a{padding:0 0 18px;color:#2a3b50}

/* article pages */
.pagehead{background:linear-gradient(135deg,#071a31,#0e3a6b);color:#fff;padding:46px 0 40px}
.pagehead h1{font-size:clamp(26px,3.6vw,38px);line-height:1.3;max-width:900px}
.pagehead p{color:#cfe0f5;margin-top:10px;max-width:800px}
.crumb{font-size:13px;color:#9fc2e6;margin-bottom:12px}
.crumb a{color:#bfe0ff}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;padding:44px 0 70px;align-items:start}
article h2{font-size:24px;margin:34px 0 12px;padding-left:12px;border-left:5px solid var(--blue);line-height:1.35}
article h2:first-child{margin-top:0}
article h3{font-size:18px;margin:22px 0 8px}
article p{margin-bottom:12px}
article ul,article ol{margin:0 0 14px 1.3em}
article li{margin-bottom:6px}
.meta{font-size:13px;color:var(--mut);margin-bottom:22px}
aside .box{background:#fff;border:1px solid var(--line);border-radius:var(--rad);padding:20px;margin-bottom:18px}
aside h3{font-size:16px;margin-bottom:10px}
aside ul{list-style:none;margin:0}
aside li{padding:7px 0;border-bottom:1px dashed var(--line);font-size:14.5px}
aside li:last-child{border:0}
aside .tel{font-size:22px;font-weight:800;color:var(--blue);display:block}
.hero-prod{display:grid;grid-template-columns:300px 1fr;gap:30px;align-items:center}
.hero-prod img{border-radius:14px;border:4px solid rgba(255,255,255,.3)}
.note{font-size:13px;color:var(--mut);background:#fff8e6;border:1px solid #f6e2a8;border-radius:10px;padding:10px 14px;margin:12px 0}

/* contact */
.cbox{background:#fff;border:1px solid var(--line);border-radius:var(--rad);padding:24px}
.cbox h3{margin-bottom:8px}
.row{padding:10px 0;border-bottom:1px dashed var(--line)}
.row:last-child{border:0}
.row small{display:block;color:var(--mut);font-size:13px}
form label{display:block;font-weight:600;margin:12px 0 4px;font-size:14px}
form input,form textarea,form select{width:100%;padding:11px 13px;border:1px solid #c6d4e4;border-radius:10px;font:inherit;background:#fff}
form input:focus,form textarea:focus,form select:focus{outline:2px solid #9cc3f3;border-color:var(--blue)}
.ctaband{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;border-radius:20px;padding:40px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.ctaband h2{font-size:26px;margin-bottom:6px}
.ctaband p{color:#cfe0f5}

/* footer */
footer.site{background:#071a31;color:#a9bfd8;padding:50px 0 24px;font-size:14.5px}
footer.site .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:30px}
footer.site h4{color:#fff;margin-bottom:12px;font-size:15px}
footer.site a{color:#a9bfd8}
footer.site li{list-style:none;margin-bottom:6px}
footer.site .cp{border-top:1px solid #15304f;margin-top:30px;padding-top:18px;font-size:13px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.callbar{display:none}

@media(max-width:960px){
 .hero .wrap{grid-template-columns:1fr;padding-top:48px;padding-bottom:48px}
 .g4{grid-template-columns:repeat(2,1fr)}
 .g3{grid-template-columns:repeat(2,1fr)}
 .steps{grid-template-columns:repeat(2,1fr)}
 .layout{grid-template-columns:1fr}
 .hero-prod{grid-template-columns:1fr}
 footer.site .cols{grid-template-columns:1fr 1fr}
 .stats .wrap{grid-template-columns:repeat(2,1fr)}
 .stat:nth-child(2){border-right:0}
 .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
}
@media(max-width:760px){
 .burger{display:block}
 nav.main{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 16px}
 nav.main.open{display:flex}
 nav.main a{padding:12px 10px}
 header.site .wrap{position:relative}
 .top .hide-m{display:none}
 section.blk{padding:52px 0}
 .g4,.g3,.g2,.steps{grid-template-columns:1fr}
 footer.site .cols{grid-template-columns:1fr}
 body{padding-bottom:58px}
 .callbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);box-shadow:0 -4px 16px rgba(0,0,0,.08)}
 .callbar a{flex:1;text-align:center;padding:15px 4px;font-weight:700;color:var(--blue)}
 .callbar a+a{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff}
 .ctaband{padding:28px 22px}
}