:root{--navy:#1d2464;--navy-2:#2a3384;--teal:#159a93;--teal-2:#0f7d78;--teal-lt:#e6f6f4;--ink:#1c2431;--muted:#5b6474;--line:#e3e8ee;--bg:#ffffff;--bg-2:#f5f8fb;--radius:14px;--shadow:0 6px 24px rgba(20,30,60,.08);--max:1180px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;overflow-x:hidden;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
body.zh{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑","Noto Sans CJK SC","Source Han Sans SC",Roboto,Helvetica,Arial,sans-serif}
body.zh h1,body.zh h2,body.zh h3,body.zh h4{letter-spacing:0}
img{max-width:100%;height:auto;display:block}
a{color:var(--teal-2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5em;color:var(--navy);font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.75rem,4vw,3rem)}
h2{font-size:clamp(1.4rem,3vw,2.1rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.sr{position:absolute;left:-9999px}
/* header */
.topbar{background:var(--navy);color:#dfe4ff;font-size:.85rem}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;min-height:36px;gap:12px;flex-wrap:wrap}
.topbar a{color:#fff}
.topbar span{white-space:nowrap}
.topbar .right{display:flex;align-items:center;gap:10px}
.lang{display:inline-flex;align-items:center;gap:6px;border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:3px 10px;font-weight:600;line-height:1.4;white-space:nowrap}
.lang:hover{background:rgba(255,255,255,.12);text-decoration:none}
nav.main .lang{border-color:var(--line);color:var(--navy);padding:8px 14px}
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);font-size:1.25rem}
.logo img{height:40px;width:auto}
.logo:hover{text-decoration:none}
nav.main ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;align-items:center}
nav.main a{display:block;padding:10px 12px;color:var(--ink);font-weight:500;border-radius:8px}
nav.main a:hover,nav.main a.on{background:var(--teal-lt);color:var(--teal-2);text-decoration:none}
nav.main .cta{background:var(--teal);color:#fff;font-weight:600}
nav.main .cta:hover{background:var(--teal-2);color:#fff}
nav.main li.m-only{display:none}
.burger{display:none;background:none;border:1px solid var(--line);border-radius:8px;width:44px;height:44px;cursor:pointer}
.burger span{display:block;width:22px;height:2px;background:var(--navy);margin:4px auto}
@media (max-width:900px){
 .burger{display:block}
 header.site .wrap{min-height:60px}
 .logo img{height:34px}
 nav.main{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
 nav.main.open{display:block}
 nav.main ul{flex-direction:column;align-items:stretch;padding:8px 12px 16px}
 nav.main a{padding:13px 14px;font-size:1.02rem}
 nav.main li.m-only{display:block}
 nav.main li.m-only .lang{display:block;text-align:center;margin-top:6px}
 .topbar .hide-m{display:none}
 .topbar span{white-space:normal}
 .topbar .wrap{justify-content:center;text-align:center}
}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:999px;font-weight:600;border:2px solid transparent;transition:.15s;cursor:pointer;font-size:1rem;min-height:46px}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-p{background:var(--teal);color:#fff}
.btn-p:hover{background:var(--teal-2);color:#fff}
.btn-o{border-color:var(--navy);color:var(--navy);background:#fff}
.btn-o:hover{background:var(--navy);color:#fff}
.btn-w{background:#25D366;color:#fff}
.btn-w:hover{background:#1ebe5b;color:#fff}
.btn svg{width:20px;height:20px;fill:currentColor;flex:none}
.actions{display:flex;gap:12px;flex-wrap:wrap}
@media (max-width:520px){.actions{flex-direction:column}.actions .btn{width:100%}}
/* hero */
.hero{background:linear-gradient(135deg,#eef4ff 0%,#e6f6f4 100%);padding:56px 0 48px;overflow:hidden}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero .kicker{display:inline-block;background:#fff;color:var(--teal-2);font-weight:700;font-size:.8rem;letter-spacing:.08em;text-transform:uppercase;padding:6px 12px;border-radius:999px;margin-bottom:16px;border:1px solid #cfe9e6}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:560px}
.hero .actions{margin-top:22px}
.hero .visual{position:relative}
.hero .visual img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;object-fit:cover;aspect-ratio:4/3}
.hero .badge{position:absolute;left:-10px;bottom:-14px;background:#fff;border-radius:12px;padding:10px 14px;box-shadow:var(--shadow);font-size:.85rem;font-weight:600;color:var(--navy);display:flex;align-items:center;gap:8px}
.hero .badge b{color:var(--teal-2);font-size:1.1rem}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr;gap:26px}.hero{padding:32px 0 36px}.hero .badge{left:8px;bottom:8px}.hero p.lead{font-size:1.02rem}.hero .visual img{aspect-ratio:16/10}.hero .kicker{font-size:.72rem;letter-spacing:.05em}}
/* trust strip */
.trust{background:var(--navy);color:#fff}
.trust ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(6,1fr);gap:8px}
.trust li{padding:18px 8px;text-align:center;font-size:.85rem;line-height:1.35}
.trust li b{display:block;font-size:1.3rem;color:#8fe3dc;margin-bottom:2px}
@media (max-width:900px){.trust ul{grid-template-columns:repeat(3,1fr);gap:4px}.trust li{padding:14px 6px;font-size:.78rem}}
@media (max-width:520px){.trust ul{grid-template-columns:repeat(2,1fr)}}
/* sections */
section{padding:56px 0}
section.alt{background:var(--bg-2)}
.sec-head{max-width:720px;margin-bottom:28px}
.sec-head p{color:var(--muted);font-size:1.05rem}
.center{text-align:center;margin-left:auto;margin-right:auto}
@media (max-width:720px){section{padding:38px 0}.sec-head{margin-bottom:20px}.sec-head p{font-size:.98rem}}
/* category cards */
.cats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cat{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.15s;display:flex;flex-direction:column}
.cat:hover{box-shadow:var(--shadow);transform:translateY(-2px);text-decoration:none}
.cat img{aspect-ratio:1/1;object-fit:cover;width:100%;background:#fff}
.cat .body{padding:16px 18px 18px}
.cat h3{margin-bottom:6px;font-size:1.1rem}
.cat p{color:var(--muted);font-size:.93rem;margin:0}
.cat .more{margin-top:10px;color:var(--teal-2);font-weight:600;font-size:.9rem}
.cat .cnt{display:inline-block;background:var(--teal-lt);color:var(--teal-2);font-size:.75rem;font-weight:700;border-radius:999px;padding:2px 9px;margin-bottom:8px}
@media (max-width:900px){.cats{grid-template-columns:repeat(2,1fr);gap:14px}}
@media (max-width:520px){.cats{grid-template-columns:repeat(2,1fr);gap:10px}.cat .body{padding:10px 11px 12px}.cat h3{font-size:.95rem}.cat p{font-size:.8rem;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.cat .more{font-size:.82rem}}
/* product grid */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.prod{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.prod img{aspect-ratio:1/1;object-fit:cover;width:100%;background:#fff}
.prod .body{padding:14px 14px 16px;display:flex;flex-direction:column;flex:1}
.prod h3{font-size:.98rem;margin-bottom:8px;line-height:1.35;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.prod .moq{font-size:.82rem;color:var(--muted);margin-top:auto;line-height:1.5}
.prod .moq b{color:var(--ink)}
.prod .price{font-size:.82rem;color:var(--muted)}
.prod .price b{color:var(--teal-2)}
.prod .q{margin-top:10px;font-size:.88rem;font-weight:600;display:inline-block;padding:6px 0}
@media (max-width:1000px){.grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:720px){.grid{grid-template-columns:repeat(2,1fr);gap:10px}.prod .body{padding:10px 10px 12px}.prod h3{font-size:.86rem;margin-bottom:6px}.prod .moq,.prod .price{font-size:.76rem}.prod .q{font-size:.84rem}}
.subh{display:flex;align-items:baseline;gap:10px;margin:34px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--teal-lt)}
.subh h3{margin:0;font-size:1.15rem}
.subh span{color:var(--muted);font-size:.85rem}
.subh:first-of-type{margin-top:0}
.subnav{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 6px}
.subnav a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font-size:.85rem;font-weight:600;color:var(--navy)}
.subnav a:hover{border-color:var(--teal);color:var(--teal-2);text-decoration:none}
/* features */
.feat{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat .f{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.feat .f .ic{width:44px;height:44px;border-radius:10px;background:var(--teal-lt);color:var(--teal-2);display:flex;align-items:center;justify-content:center;margin-bottom:12px;font-weight:800}
.feat .f p{color:var(--muted);margin:0;font-size:.95rem}
@media (max-width:900px){.feat{grid-template-columns:1fr 1fr;gap:14px}}
@media (max-width:560px){.feat{grid-template-columns:1fr}.feat .f{padding:16px}}
/* steps */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.steps div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 16px;position:relative}
.steps div:before{counter-increment:s;content:counter(s);display:inline-flex;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff;align-items:center;justify-content:center;font-weight:700;margin-bottom:10px}
.steps b{display:block;color:var(--navy);margin-bottom:4px}
.steps span{color:var(--muted);font-size:.9rem}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr);gap:10px}}
@media (max-width:520px){.steps{grid-template-columns:1fr}.steps div{padding:14px 14px 14px 58px}.steps div:before{position:absolute;left:14px;top:14px;margin:0}}
/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.split img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;object-fit:cover;aspect-ratio:4/3}
@media (max-width:900px){.split{grid-template-columns:1fr;gap:22px}.split img[style*="1/1"]{max-width:420px;margin:0 auto}}
/* gallery */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.gal figure{margin:0;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff}
.gal img{aspect-ratio:16/10;object-fit:cover;width:100%}
.gal figcaption{padding:10px 12px;font-size:.88rem;color:var(--muted)}
@media (max-width:720px){.gal{grid-template-columns:repeat(2,1fr);gap:10px}.gal figcaption{font-size:.78rem;padding:8px 10px}}
/* spec table */
table.spec{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:.95rem}
table.spec th,table.spec td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.spec th{width:32%;background:var(--bg-2);color:var(--navy);font-weight:600}
table.spec tr:last-child td,table.spec tr:last-child th{border-bottom:0}
@media (max-width:560px){table.spec,table.spec tbody,table.spec tr,table.spec th,table.spec td{display:block;width:100%}table.spec th{border-bottom:0;padding:10px 12px 2px;font-size:.82rem;text-transform:uppercase;letter-spacing:.04em}body.zh table.spec th{text-transform:none;letter-spacing:0}table.spec td{padding:0 12px 10px;font-size:.92rem}}
/* faq */
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 18px;margin-bottom:10px}
.faq summary{cursor:pointer;padding:14px 0;font-weight:600;color:var(--navy);list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--teal);font-size:1.3rem;line-height:1;flex:none}
.faq details[open] summary:after{content:"–"}
.faq details p{color:var(--muted);padding-bottom:14px;margin:0}
@media (max-width:560px){.faq details{padding:0 14px}.faq summary{font-size:.95rem}}
/* cta band */
.band{background:linear-gradient(120deg,var(--navy),var(--navy-2) 60%,#1b6e69);color:#fff;padding:52px 0}
.band h2{color:#fff}
.band p{color:#dfe4ff;max-width:640px}
.band .actions{margin-top:18px}
@media (max-width:720px){.band{padding:38px 0}}
/* page head */
.phead{background:linear-gradient(135deg,#eef4ff,#e6f6f4);padding:40px 0 34px}
.phead .crumb{font-size:.85rem;color:var(--muted);margin-bottom:10px}
.phead .crumb a{color:var(--muted)}
.phead p{color:var(--muted);max-width:760px;font-size:1.05rem;margin:0}
@media (max-width:720px){.phead{padding:26px 0 24px}.phead p{font-size:.98rem}}
/* contact */
.contact{display:grid;grid-template-columns:1fr 1.2fr;gap:36px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card ul{list-style:none;padding:0;margin:0}
.card li{padding:10px 0;border-bottom:1px solid var(--line);display:flex;gap:12px;align-items:flex-start;flex-wrap:wrap}
.card li:last-child{border-bottom:0}
.card li b{min-width:88px;color:var(--navy)}
.card li span{word-break:break-word;flex:1;min-width:0}
form label{display:block;font-weight:600;font-size:.9rem;margin:12px 0 6px;color:var(--navy)}
form input,form textarea,form select{width:100%;padding:12px 14px;border:1px solid #cfd6df;border-radius:10px;font:inherit;font-size:16px;background:#fff}
form input:focus,form textarea:focus,form select:focus{outline:2px solid var(--teal);border-color:var(--teal)}
form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form .btn{width:100%;margin-top:6px}
@media (max-width:900px){.contact{grid-template-columns:1fr;gap:20px}form .row{grid-template-columns:1fr;gap:0}.card{padding:18px}}
/* footer */
footer{background:#121737;color:#b9c0dc;padding:48px 0 24px;font-size:.92rem}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px}
footer h4{color:#fff;font-size:1rem;margin-bottom:12px}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin-bottom:8px}
footer a{color:#d6dbf2;word-break:break-word}
footer .fine{border-top:1px solid #2a3160;margin-top:32px;padding-top:18px;font-size:.82rem;color:#8b93b8;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
@media (max-width:900px){footer .cols{grid-template-columns:1fr 1fr;gap:22px}}
@media (max-width:520px){footer .cols{grid-template-columns:1fr}footer{padding:36px 0 90px}}
/* whatsapp float */
.wa-float{position:fixed;right:18px;bottom:18px;z-index:60;background:#25D366;color:#fff;border-radius:999px;padding:12px 18px 12px 14px;display:flex;align-items:center;gap:8px;font-weight:700;box-shadow:0 8px 24px rgba(0,0,0,.2)}
.wa-float:hover{text-decoration:none;background:#1ebe5b}
.wa-float svg{width:24px;height:24px;fill:#fff}
@media (max-width:520px){.wa-float{right:14px;bottom:14px;padding:12px 16px 12px 12px;font-size:.92rem}}
.note{font-size:.85rem;color:var(--muted)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 0}
.tags span{background:var(--teal-lt);color:var(--teal-2);border-radius:999px;padding:5px 12px;font-size:.85rem;font-weight:600}
@media (max-width:520px){.tags span{font-size:.78rem;padding:4px 10px}}
.two{display:grid;grid-template-columns:1fr 1fr;gap:28px}
@media (max-width:800px){.two{grid-template-columns:1fr}}
.list-check{list-style:none;padding:0;margin:0}
.list-check li{padding:6px 0 6px 28px;position:relative}
.list-check li:before{content:"✓";position:absolute;left:0;top:6px;color:var(--teal);font-weight:800}
.stat{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stat div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;text-align:center}
.stat b{display:block;font-size:1.8rem;color:var(--teal-2)}
.stat span{color:var(--muted);font-size:.9rem}
@media (max-width:720px){.stat{grid-template-columns:repeat(2,1fr);gap:10px}.stat div{padding:14px 10px}.stat b{font-size:1.4rem}.stat span{font-size:.82rem}}