:root{
--ink:#14181f; --ink2:#3d4653; --mute:#6b7684; --line:#e3e6ea;
--bg:#ffffff; --bg2:#f6f7f9; --bg3:#eef1f5;
--brand:#0b3c66; --brand2:#12558f; --accent:#c26a12; --accent2:#e08a2c;
--ok:#0f6e56; --radius:6px; --maxw:1180px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
font-size:16px;line-height:1.75;color:var(--ink);background:var(--bg)}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.3;margin:0 0 .6em;font-weight:600;letter-spacing:-.01em}
h1{font-size:2.1rem} h2{font-size:1.55rem;margin-top:2em} h3{font-size:1.18rem;margin-top:1.6em}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em;padding-left:1.3em}
li{margin:.35em 0}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* skip link */
.skip{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 16px;z-index:99}
.skip:focus{left:8px;top:8px}

/* header */
header{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:50}
.hbar{max-width:var(--maxw);margin:0 auto;padding:0 24px;display:flex;align-items:center;gap:28px;height:66px}
.logo{font-weight:700;font-size:1.22rem;color:var(--brand);letter-spacing:.14em;white-space:nowrap}
.logo span{display:block;font-size:.56rem;letter-spacing:.2em;color:var(--mute);font-weight:500;margin-top:-2px}
nav.main{display:flex;gap:22px;flex:1;flex-wrap:wrap}
nav.main a{font-size:.92rem;color:var(--ink2);padding:4px 0;border-bottom:2px solid transparent}
nav.main a:hover,nav.main a.on{color:var(--brand);border-bottom-color:var(--brand);text-decoration:none}
.lang{display:flex;gap:8px;font-size:.8rem;align-items:center}
.lang a{padding:3px 8px;border:1px solid var(--line);border-radius:4px;color:var(--mute)}
.lang a.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:9px 18px;border-radius:var(--radius);font-size:.9rem;font-weight:600;white-space:nowrap}
.btn:hover{background:var(--accent2);text-decoration:none}
.btn.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.6)}
.btn.ghost:hover{background:rgba(255,255,255,.14)}
.navtoggle{display:none;background:var(--bg2);border:1px solid var(--line);border-radius:4px;padding:6px 10px;font-size:.85rem;cursor:pointer}

/* hero */
.hero{background:linear-gradient(180deg,#0b3c66 0%,#12558f 100%);color:#fff;padding:64px 0 58px}
.hero h1{color:#fff;font-size:2.4rem;margin-bottom:.4em}
.hero p.lead{font-size:1.1rem;color:#d3e2f0;max-width:760px;margin-bottom:1.6em}
.hero .btnrow{display:flex;gap:12px;flex-wrap:wrap}
.hstats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:18px;margin-top:44px;
border-top:1px solid rgba(255,255,255,.22);padding-top:26px}
.hstats div span{display:block;font-size:1.65rem;font-weight:600;color:#fff;line-height:1.2}
.hstats div small{color:#a9c6e0;font-size:.82rem}

/* breadcrumb */
.crumb{font-size:.82rem;color:var(--mute);padding:14px 0 0}
.crumb a{color:var(--mute)}
.crumb span{margin:0 6px;color:#c3c9d1}

/* layout */
.page{padding:34px 0 70px}
.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.g3{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.g4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.aside{display:grid;grid-template-columns:1fr 300px;gap:44px;align-items:start}
@media(max-width:900px){.aside{grid-template-columns:1fr}}

/* cards */
.card{border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:#fff;transition:border-color .15s}
.card:hover{border-color:var(--brand2)}
.card h3{margin-top:0;font-size:1.05rem}
.card h3 a{color:var(--ink)}
.card p{font-size:.93rem;color:var(--ink2);margin-bottom:0}
.card .tag{display:inline-block;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:8px}
.card ul{padding-left:1.1em;margin-bottom:0;font-size:.9rem;color:var(--ink2)}
.icon{width:38px;height:38px;border-radius:var(--radius);background:var(--bg3);display:flex;align-items:center;
justify-content:center;margin-bottom:14px;font-weight:700;color:var(--brand);font-size:.85rem}

/* highlight box */
.note{background:var(--bg2);border-left:3px solid var(--brand2);padding:16px 20px;border-radius:0 var(--radius) var(--radius) 0;margin:1.6em 0}
.note p:last-child{margin-bottom:0}
.warn{background:#fdf6ec;border-left-color:var(--accent)}

/* table */
.tw{overflow-x:auto;margin:1.6em 0;border:1px solid var(--line);border-radius:var(--radius)}
table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:480px}
caption{text-align:left;font-size:.85rem;color:var(--mute);padding:10px 14px;border-bottom:1px solid var(--line);background:var(--bg2)}
th,td{padding:10px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
thead th{background:var(--bg3);font-weight:600;color:var(--brand);white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:nth-child(even){background:#fafbfc}
td.num{font-variant-numeric:tabular-nums}

/* spec list */
.specs{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:0;margin:1.6em 0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.specs div{padding:14px 18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.specs dt{font-size:.76rem;text-transform:uppercase;letter-spacing:.07em;color:var(--mute);margin:0}
.specs dd{margin:2px 0 0;font-weight:600;font-size:1.02rem;color:var(--brand)}

/* faq */
details{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:10px;background:#fff}
details summary{cursor:pointer;padding:14px 18px;font-weight:600;font-size:1rem;list-style:none;display:flex;justify-content:space-between;gap:12px}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";color:var(--brand2);font-weight:700;font-size:1.2rem;line-height:1}
details[open] summary::after{content:"\2013"}
details .body{padding:0 18px 16px;font-size:.94rem;color:var(--ink2)}
details .body p:last-child{margin-bottom:0}

/* product hero strip */
.strip{background:var(--bg3);padding:40px 0;margin-bottom:44px}
.strip h1{margin-bottom:.3em}
.strip p{max-width:760px;color:var(--ink2);margin-bottom:0}

/* cta band */
.band{background:var(--brand);color:#fff;padding:46px 0;margin-top:60px}
.band h2{color:#fff;margin-top:0}
.band p{color:#c8dcee;max-width:640px}
.band .btnrow{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}

/* listing meta */
.meta{font-size:.8rem;color:var(--mute);border-top:1px solid var(--line);padding-top:12px;margin-top:18px}

/* tags chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:1.2em 0}
.chips a,.chips span{font-size:.8rem;background:var(--bg2);border:1px solid var(--line);border-radius:20px;padding:4px 12px;color:var(--ink2)}
.chips a:hover{border-color:var(--brand2);color:var(--brand)}

/* footer */
footer{background:#0c1a26;color:#9fb0c0;font-size:.88rem;padding:52px 0 26px;margin-top:0}
footer h4{color:#fff;font-size:.9rem;text-transform:uppercase;letter-spacing:.09em;margin:0 0 14px}
footer a{color:#9fb0c0}
footer a:hover{color:#fff}
.fgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:34px}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin:.4em 0}
.fbot{border-top:1px solid #1e2f3d;margin-top:38px;padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.8rem;color:#7b8c9c}

/* responsive */
@media(max-width:860px){
.hbar{flex-wrap:wrap;height:auto;padding:12px 24px;gap:14px}
nav.main{display:none;width:100%;order:3;flex-direction:column;gap:0}
nav.main.open{display:flex}
nav.main a{padding:9px 0;border-bottom:1px solid var(--line)}
.navtoggle{display:block}
.hero{padding:44px 0 38px}
.hero h1{font-size:1.75rem}
h1{font-size:1.65rem}h2{font-size:1.3rem}
}
@media print{header,.band,nav{display:none}body{font-size:12pt}}