:root{--navy:#0b2545;--navy2:#13315c;--teal:#00a9ce;--teal-d:#007ea3;--ink:#1c2733;--gray:#5b6b7b;--line:#e3e9ef;--bg:#f5f8fa;--w:#fff}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;color:var(--ink);line-height:1.75;background:var(--w);font-size:16px}
a{color:var(--teal-d);text-decoration:none}
a:hover{color:var(--teal)}
img{max-width:100%;height:auto}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
/* header */
.topbar{background:var(--navy);color:#c9d6e3;font-size:13px;padding:6px 0}
.topbar .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.topbar a{color:#c9d6e3}
header.site{background:var(--w);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100;box-shadow:0 1px 6px rgba(11,37,69,.06)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;min-height:64px}
.logo{font-size:21px;font-weight:700;color:var(--navy);letter-spacing:.5px}
.logo small{display:block;font-size:11px;color:var(--gray);font-weight:400;letter-spacing:1px}
nav.main ul{list-style:none;display:flex;gap:4px;align-items:center}
nav.main>ul>li{position:relative}
nav.main a{display:block;padding:20px 14px;color:var(--ink);font-weight:500;font-size:15px}
nav.main a:hover,nav.main li.on>a{color:var(--teal-d)}
nav.main li.on>a{box-shadow:inset 0 -3px 0 var(--teal)}
nav.main .sub{display:none;position:absolute;left:0;top:100%;background:var(--w);border:1px solid var(--line);border-top:3px solid var(--teal);min-width:230px;box-shadow:0 8px 24px rgba(11,37,69,.12)}
nav.main li:hover .sub{display:block}
nav.main .sub li{width:100%}
nav.main .sub a{padding:10px 16px;font-size:14px;border-bottom:1px solid var(--line)}
.cta-btn{background:var(--teal);color:#fff!important;border-radius:4px;padding:10px 18px!important;margin-left:10px;font-weight:600}
.cta-btn:hover{background:var(--teal-d)}
#menu-t{display:none;background:none;border:1px solid var(--line);border-radius:4px;padding:6px 10px;font-size:20px;color:var(--navy)}
/* hero */
.hero{background:linear-gradient(135deg,var(--navy) 0%,var(--navy2) 55%,#1b4a7a 100%);color:#fff;padding:72px 0 64px}
.hero h1{font-size:clamp(26px,4vw,42px);line-height:1.3;margin-bottom:16px}
.hero p.lead{font-size:17px;color:#c9d6e3;max-width:760px;margin-bottom:28px}
.hero .tag{display:inline-block;background:rgba(0,169,206,.18);border:1px solid rgba(0,169,206,.5);color:#7fdcf0;font-size:13px;padding:4px 14px;border-radius:20px;margin-bottom:18px;letter-spacing:1px}
.btns a{display:inline-block;margin:0 12px 10px 0;padding:12px 26px;border-radius:4px;font-weight:600;font-size:15px}
.btn-p{background:var(--teal);color:#fff}
.btn-p:hover{background:#00bce4;color:#fff}
.btn-o{border:1px solid rgba(255,255,255,.5);color:#fff}
.btn-o:hover{border-color:var(--teal);color:#7fdcf0}
/* page head */
.phead{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;padding:44px 0 36px}
.phead h1{font-size:clamp(24px,3.2vw,34px);margin:6px 0 10px}
.phead p{color:#c9d6e3;max-width:820px}
.crumb{font-size:13px;color:#8fa3b8}
.crumb a{color:#8fa3b8}
.crumb a:hover{color:#7fdcf0}
/* sections */
section.sec{padding:48px 0 56px}
section.alt{background:var(--bg)}
.sec-h{text-align:center;margin-bottom:38px}
.sec-h .en{color:var(--teal);font-size:13px;letter-spacing:2px;text-transform:uppercase;font-weight:600}
.sec-h h2{font-size:clamp(22px,3vw,30px);color:var(--navy);margin:6px 0 10px}
.sec-h p{color:var(--gray);max-width:720px;margin:0 auto}
h2.inb{font-size:24px;line-height:1.4;color:var(--navy);margin:38px 0 16px;padding-left:12px;border-left:4px solid var(--teal)}
h3.inb{font-size:19px;color:var(--navy);margin:26px 0 10px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--w);border:1px solid var(--line);border-radius:8px;padding:26px;transition:.2s;display:flex;flex-direction:column}
.card:hover{box-shadow:0 10px 28px rgba(11,37,69,.1);transform:translateY(-3px);border-color:#bfe6f0}
.card .ic{font-size:30px;margin-bottom:12px}
.card h3{font-size:18px;color:var(--navy);margin-bottom:8px}
.card h3 a{color:var(--navy)}
.card h3 a:hover{color:var(--teal-d)}
.card p{font-size:14.5px;line-height:1.65;color:var(--gray);flex:1}
.card .more{margin-top:14px;font-size:14px;font-weight:600;color:var(--teal-d)}
.card .en-sub{font-size:12px;color:var(--teal);letter-spacing:1px;text-transform:uppercase;margin-bottom:6px;font-weight:600}
/* tables */
table.tb{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;background:var(--w)}
table.tb th{background:var(--navy);color:#fff;text-align:left;padding:11px 14px;font-weight:600}
table.tb td{padding:11px 14px;border:1px solid var(--line);vertical-align:top;color:var(--ink)}
table.tb tr:nth-child(even) td{background:var(--bg)}
.tb-scroll{overflow-x:auto}
/* misc */
ul.tick{list-style:none;margin:14px 0}
ul.tick li{padding:6px 0 6px 28px;position:relative}
ul.tick li:before{content:"✓";position:absolute;left:2px;color:var(--teal);font-weight:700}
.note{background:#eef7fa;border-left:4px solid var(--teal);padding:16px 20px;border-radius:0 6px 6px 0;font-size:14.5px;color:#33505f;margin:22px 0}
.faq{margin:10px 0}
.faq details{background:var(--w);border:1px solid var(--line);border-radius:6px;margin-bottom:10px;overflow:hidden}
.faq summary{padding:15px 20px;font-weight:600;color:var(--navy);cursor:pointer;list-style:none;position:relative;padding-right:44px}
.faq summary:after{content:"+";position:absolute;right:18px;top:12px;font-size:20px;color:var(--teal)}
.faq details[open] summary:after{content:"−"}
.faq .a{padding:0 20px 16px;color:var(--gray);font-size:15px}
.kw{display:inline-block;background:var(--bg);border:1px solid var(--line);border-radius:20px;padding:4px 14px;font-size:13px;color:var(--gray);margin:0 8px 8px 0}
/* cta band */
.band{background:linear-gradient(135deg,var(--navy),#1b4a7a);color:#fff;text-align:center;padding:52px 0}
.band h2{font-size:clamp(20px,2.8vw,28px);margin-bottom:10px}
.band p{color:#c9d6e3;margin-bottom:24px}
/* contact */
.cinfo{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:20px 0}
.cinfo .ci{background:var(--w);border:1px solid var(--line);border-radius:8px;padding:20px}
.cinfo .ci b{color:var(--navy);display:block;margin-bottom:4px}
/* footer */
footer.site{background:var(--navy);color:#a9bccf;font-size:14px;margin-top:0}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:34px;padding:48px 0 36px}
footer h4{color:#fff;font-size:15px;margin-bottom:14px}
footer ul{list-style:none}
footer li{margin-bottom:8px}
footer a{color:#a9bccf}
footer a:hover{color:#7fdcf0}
footer .fbrand{font-size:20px;font-weight:700;color:#fff;margin-bottom:10px}
.fbot{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:13px;color:#7e93a8;text-align:center}
.fbot a{color:#7e93a8}
/* tabs */
.tabbar{display:flex;flex-wrap:wrap;gap:10px;margin:6px 0 26px}
.tabbtn{border:1px solid var(--line);background:var(--w);border-radius:24px;padding:10px 20px;font-size:15px;font-weight:600;color:var(--navy);cursor:pointer;transition:.15s;font-family:inherit}
.tabbtn:hover{border-color:var(--teal);color:var(--teal-d)}
.tabbtn.on{background:var(--navy);border-color:var(--navy);color:#fff}
.tabbtn .cnt{display:inline-block;margin-left:8px;background:var(--teal);color:#fff;font-size:12px;border-radius:10px;padding:1px 8px;vertical-align:1px}
.tabpane{display:none}
.tabpane.on{display:block}
.tabblurb{color:var(--gray);max-width:900px;margin-bottom:20px}
/* images */
.figrow{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin:14px 0}
.figrow figure{background:var(--w);border:1px solid var(--line);border-radius:8px;padding:16px 12px 12px;text-align:center;transition:.2s}
.figrow figure:hover{box-shadow:0 8px 22px rgba(11,37,69,.1)}
.figrow img{height:150px;width:100%;object-fit:contain}
.figrow figcaption{font-size:13px;color:var(--gray);margin-top:10px;line-height:1.5}
.card .cimg{background:var(--w);border-radius:6px;text-align:center;margin-bottom:14px}
.card .cimg img{height:120px;width:100%;object-fit:contain}
.product-hero{display:grid;grid-template-columns:240px minmax(0,1fr);gap:36px;align-items:center;max-width:1000px;margin-bottom:34px}
.detail-img{width:240px;background:var(--w);border:1px solid var(--line);border-radius:8px;padding:16px;text-align:center}
.detail-img img{display:block;height:160px;width:100%;object-fit:contain}
.detail-copy .en-sub{font-size:12px;color:var(--teal);letter-spacing:1px;text-transform:uppercase;margin-bottom:6px;font-weight:600}
.detail-copy h2.inb{font-size:24px;margin:0 0 10px;padding:0;border:0}
.detail-copy>p{max-width:700px;color:#45586a}
.pillrow{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.pill{display:inline-block;background:#eef7fa;border:1px solid #c9eaf2;border-radius:20px;color:#33505f;font-size:13px;padding:4px 12px}
.detail-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.detail-actions a{display:inline-block;border-radius:4px;padding:10px 18px;font-weight:600;font-size:14px}
.detail-actions .doc{background:var(--teal);color:#fff}
.detail-actions .doc:hover{background:var(--teal-d);color:#fff}
.detail-actions .outline{border:1px solid var(--line);color:var(--navy);background:#fff}
.doc-list{margin:12px 0 0;padding-left:18px}
.doc-list li{margin:6px 0}
.source-note{font-size:13px;color:var(--gray);margin-top:12px}
.wrap>h2.inb+.grid.g3{grid-template-columns:repeat(auto-fit,minmax(min(250px,100%),1fr));margin-bottom:32px}
.wrap>h2.inb+.grid.g3>.card:only-child{grid-column:1/-1;display:grid;grid-template-columns:180px minmax(0,1fr);column-gap:28px;align-items:start;padding:22px 26px}
.wrap>h2.inb+.grid.g3>.card:only-child .cimg{grid-column:1;grid-row:1 / span 6;align-self:center;margin:0}
.wrap>h2.inb+.grid.g3>.card:only-child .cimg img{height:150px}
.wrap>h2.inb+.grid.g3>.card:only-child>:not(.cimg){grid-column:2}
.wrap>h2.inb+.grid.g3>.card:only-child .pillrow{margin:10px 0 4px}
.wrap>h2.inb+.grid.g3>.card:only-child .more{margin-top:10px}
.art .artimg{background:var(--w);border:1px solid var(--line);border-radius:8px;padding:18px;text-align:center;margin:18px 0}
.art .artimg img{max-height:260px;object-fit:contain}
.art .artimg figcaption{font-size:13px;color:var(--gray);margin-top:8px}
.logo img{height:44px;width:auto;display:block}
/* article */
.art{max-width:860px}
.art p{margin:12px 0;color:#2b3947}
.art time{color:var(--gray);font-size:14px}
@media(max-width:920px){
 .g3,.g4{grid-template-columns:repeat(2,1fr)}
 .product-hero{grid-template-columns:1fr}
 .detail-img{width:220px;margin:0 auto}
 footer .cols{grid-template-columns:1fr 1fr}
 #menu-t{display:block}
 nav.main{display:none;position:absolute;top:100%;left:0;right:0;background:var(--w);border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(11,37,69,.12)}
 nav.main.open{display:block}
 nav.main ul{flex-direction:column;align-items:stretch;gap:0}
 nav.main a{padding:13px 22px;border-bottom:1px solid var(--line)}
 nav.main .sub{display:block;position:static;border:0;box-shadow:none;background:var(--bg)}
 nav.main .sub a{padding-left:38px}
 .cta-btn{margin:12px 22px;text-align:center}
}
@media(max-width:600px){
 .topbar .wrap{display:block}
 .topbar .wrap>span{display:block;min-width:0;overflow-wrap:anywhere}
 .topbar .wrap>span:first-child{display:none}
 .g2,.g3,.g4,.cinfo,.wrap>h2.inb+.grid.g3{grid-template-columns:1fr}
 .hero{padding:52px 0 44px}
 section.sec{padding:38px 0 46px}
 h2.inb{font-size:21px;margin-top:32px}
 .wrap>h2.inb+.grid.g3>.card:only-child{display:flex;padding:20px}
 .wrap>h2.inb+.grid.g3>.card:only-child .cimg{width:100%;margin-bottom:14px}
 .wrap>h2.inb+.grid.g3>.card:only-child .cimg img{height:120px}
 .product-hero{gap:24px}
 .detail-img{width:200px;padding:14px}
 .detail-img img{height:140px}
 .detail-copy h2.inb{font-size:21px}
}