/* DeepSea Electronics — site styles (brand: navy 0B4074 · red CC152B; serif headings, sans body) */
:root{--navy:#0B4074;--navy-d:#082f57;--navy-l:#E2E9F2;--pale:#F3F6FA;--red:#CC152B;--ink:#10213a;--mute:#5b6b80;--line:#d7dfe9;--bg:#ffffff;--max:1180px;
 --serif:"Playfair Display",Georgia,"Times New Roman",serif;--sans:Inter,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif}
html[lang=zh]{--serif:"Playfair Display","Noto Serif SC","Songti SC","SimSun",serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:16px/1.65 var(--sans);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--navy);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--serif);color:var(--navy);line-height:1.15;margin:0 0 .5em;font-weight:700}
h1{font-size:clamp(34px,5vw,58px)}h2{font-size:clamp(26px,3.2vw,38px)}h3{font-size:20px;margin-bottom:.35em}
p{margin:0 0 1em}.lead{font-size:clamp(17px,1.6vw,21px);color:var(--mute);max-width:760px}
.kicker{display:inline-block;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--red);font-weight:700;margin-bottom:14px}
/* utility bar (quick links) */
.utility{background:var(--navy-d);color:#c9d8ea;font-size:13px}
.utility .wrap{display:flex;justify-content:space-between;align-items:center;height:34px;gap:16px}
.utility a{color:#e8f0f9;display:inline-flex;align-items:center;gap:5px;margin-right:16px;white-space:nowrap}
.utility a:hover{color:#fff;text-decoration:underline}
.utility .u-right span{color:#8fb0d6;margin-right:10px}
.utility .u-right a{margin:0 0 0 14px;font-weight:600}
.m-portals{display:none}
/* header */
.top{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(8px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:22px;height:70px}
.logo img{height:44px;width:auto;display:block}
nav.main{display:flex;gap:6px;margin-left:auto}
nav.main a{padding:8px 12px;border-radius:8px;font-weight:600;font-size:15px;color:var(--ink)}
nav.main a:hover,nav.main a.on{background:var(--pale);text-decoration:none;color:var(--navy)}
.lang{font-size:14px;font-weight:600;padding:6px 10px;border:1px solid var(--line);border-radius:999px}
.btn{display:inline-block;padding:11px 20px;border-radius:10px;font-weight:700;border:2px solid var(--navy);color:var(--navy);background:#fff;line-height:1.2}
.btn:hover{text-decoration:none;background:var(--navy-l)}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}.btn.primary:hover{background:#a80f22;border-color:#a80f22}
.btn.navy{background:var(--navy);border-color:var(--navy);color:#fff}.btn.navy:hover{background:var(--navy-d)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:18px;cursor:pointer}
/* hero */
.hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(1200px 600px at 80% -10%,#1e5aa0 0%,var(--navy) 45%,var(--navy-d) 100%)}
.hero .wrap{padding:96px 24px 110px;position:relative;z-index:2}
.hero .kicker{color:#9fc4ee}
.hero h1{color:#fff;max-width:900px}.hero h1 em{font-style:normal;color:#7cc7ff}
.hero .lead{color:#d6e4f5;max-width:640px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.hero .btn{border-color:#fff;color:#fff;background:transparent}.hero .btn:hover{background:rgba(255,255,255,.12)}
.hero .btn.primary{background:var(--red);border-color:var(--red)}
.hero svg.wave{position:absolute;left:0;right:0;bottom:-2px;width:100%;height:90px;z-index:1}
.hero .grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 80%)}
/* sections */
section{padding:72px 0}section.alt{background:var(--pale)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px;margin-top:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px 26px;box-shadow:0 1px 2px #0b40740d;display:flex;flex-direction:column;gap:10px}
.card .ico{width:46px;height:46px;border-radius:12px;background:var(--navy-l);display:grid;place-items:center;color:var(--navy)}
.card .ico svg{width:26px;height:26px}
.card p{color:var(--mute);margin:0;flex:1}
.card a.more{font-weight:700}
.two{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:start}
.list{display:grid;gap:18px;margin-top:22px}
.list li{list-style:none;padding:18px 20px;border-left:4px solid var(--red);background:#fff;border-radius:0 12px 12px 0;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.list li b{display:block;color:var(--navy);font-size:17px;margin-bottom:4px}
.list li span{color:var(--mute)}
ul.list{padding:0;margin:22px 0 0}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;padding:0}
.chips li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-weight:600;color:var(--navy)}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px;margin-top:24px;padding:0}
.steps li{list-style:none;background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}
.steps li::before{counter-increment:s;content:counter(s);display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;font-weight:700;margin-bottom:12px}
.steps b{display:block;color:var(--navy);margin-bottom:6px}
.portals{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:22px}
.portals a{display:block;padding:22px;border-radius:14px;background:var(--navy);color:#fff;text-decoration:none;border:2px solid var(--navy)}
.portals a:hover{background:var(--navy-d)}
.portals b{display:block;font-size:18px;margin-bottom:2px}.portals small{color:#bcd3ee}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:22px}
.facts div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.facts small{display:block;color:var(--mute);text-transform:uppercase;letter-spacing:.08em;font-size:11px;margin-bottom:4px}
.facts b{color:var(--navy);font-size:17px}
.cta{background:linear-gradient(120deg,var(--navy),#174f8f);color:#fff;border-radius:22px;padding:48px 40px;display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.cta h2{color:#fff;margin:0 0 6px}.cta p{color:#d6e4f5;margin:0}
/* contact */
form.contact{display:grid;gap:14px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px}
form.contact label{display:grid;gap:6px;font-weight:600;font-size:14px;color:var(--navy)}
form.contact input,form.contact textarea{font:15px var(--sans);padding:12px 14px;border:1px solid #c7d2e0;border-radius:10px;width:100%}
form.contact textarea{min-height:140px;resize:vertical}
form.contact .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.msg{padding:12px 14px;border-radius:10px;font-weight:600;display:none}.msg.ok{display:block;background:#e6f6ea;color:#1a6b31}.msg.fail{display:block;background:#fdecec;color:#a80f22}
.channels{display:grid;gap:14px}.channels div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.channels small{display:block;color:var(--mute);text-transform:uppercase;letter-spacing:.08em;font-size:11px}
.channels b{font-size:17px;color:var(--navy)}
/* terms */
.prose{max-width:820px}.prose h2{font-size:22px;margin-top:2em;color:var(--red)}.prose p{margin-bottom:.9em}
/* footer */
footer{background:var(--navy-d);color:#c9d8ea;padding:56px 0 36px;margin-top:40px}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px}
footer h4{color:#fff;font:700 15px var(--sans);margin:0 0 12px;letter-spacing:.04em;text-transform:uppercase}
footer a{color:#e8f0f9}footer p{margin:0 0 6px;font-size:15px}
footer .logo{filter:brightness(0) invert(1);opacity:.95}
footer .bottom{border-top:1px solid #2a4f7a;margin-top:32px;padding-top:18px;font-size:13px;color:#9db4d0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
@media (max-width:900px){.two{grid-template-columns:1fr}footer .cols{grid-template-columns:1fr}form.contact .row{grid-template-columns:1fr}
 nav.main{display:none;position:absolute;left:0;right:0;top:70px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;padding:10px 16px 16px}
 nav.main.open{display:flex}.burger{display:block}.top .cta-top{display:none}.hero .wrap{padding:70px 24px 90px}
 .utility .u-left{display:none}.utility .u-right span{display:none}.utility .u-right{display:flex;overflow-x:auto;width:100%}.utility .u-right a{margin:0 14px 0 0;font-size:12px}
 .m-portals{display:flex;flex-direction:column;border-top:1px solid var(--line);margin-top:8px;padding-top:8px}.m-portals a{padding:8px 12px;font-weight:600;color:var(--navy)}}