:root {
  --sky:#0ea5e9; --sky2:#38bdf8; --sky4:#f0f9ff;
  --navy:#0c2340; --navy2:#1e3a5f;
  --g200:#e2e8f0; --g400:#94a3b8; --g600:#475569; --g900:#0f172a;
  --green:#10b981; --amber:#f59e0b;
  --max:920px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:'Plus Jakarta Sans',sans-serif;color:var(--g900);background:#fff;line-height:1.65;-webkit-font-smoothing:antialiased;}
h1,h2,h3,h4{font-family:'Space Grotesk',sans-serif;color:var(--navy);letter-spacing:-0.02em;line-height:1.15;}
a{color:var(--sky);}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px;}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--g200);}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:var(--max);margin:0 auto;padding:0 24px;}
.brand img{height:42px;display:block;}
.nav-right{display:flex;align-items:center;gap:18px;}
.lang-switch{font-size:.82rem;font-weight:700;text-decoration:none;color:var(--g600);border:1px solid var(--g200);border-radius:20px;padding:5px 12px;}
.lang-switch:hover{color:var(--sky);border-color:var(--sky2);}
.back{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:.92rem;text-decoration:none;color:var(--g600);}
.back:hover{color:var(--sky);}

/* breadcrumb */
.breadcrumb{font-size:.8rem;color:var(--g400);padding:16px 0 0;}
.breadcrumb a{color:var(--g600);text-decoration:none;}
.breadcrumb a:hover{color:var(--sky);}

/* masthead */
.masthead{background:linear-gradient(160deg,var(--navy) 0%,var(--navy2) 100%);color:#fff;padding:48px 0 44px;}
.masthead .eyebrow{color:var(--sky2);font-weight:700;letter-spacing:2px;text-transform:uppercase;font-size:.76rem;}
.masthead h1{color:#fff;font-size:clamp(1.7rem,4vw,2.5rem);margin:10px 0 16px;}
.masthead p{color:#cfe3f3;font-size:1.08rem;max-width:60ch;}
.masthead .meta{display:flex;gap:10px;flex-wrap:wrap;color:#cfe3f3;font-size:.85rem;margin-top:20px;}
.masthead .meta span{display:inline-flex;align-items:center;gap:7px;border:1px solid rgba(255,255,255,.2);padding:6px 12px;border-radius:20px;}
.masthead .meta i{color:var(--sky2);}

/* body */
article{padding:46px 0 30px;}
.sec{margin-top:40px;padding-top:34px;border-top:2px solid var(--g200);}
.sec:first-of-type{border-top:none;padding-top:0;margin-top:26px;}
.sec h2{font-size:1.45rem;margin-bottom:14px;}
.sec h3{font-size:1.08rem;margin:24px 0 10px;color:var(--navy2);}
.sec p{margin-bottom:12px;color:#334155;}
.sec ul{margin:8px 0 14px;padding-left:20px;color:#334155;}
.sec li{margin-bottom:7px;}

.ports{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:18px 0;}
@media(max-width:680px){.ports{grid-template-columns:1fr;}}
.port-card{background:var(--sky4);border:1px solid var(--g200);border-radius:12px;padding:20px;}
.port-card h3{margin:0 0 6px;font-size:1.05rem;color:var(--navy);}
.port-card p{font-size:.92rem;color:var(--g600);margin:0;}

.notice{background:rgba(245,158,11,.08);border:1px solid rgba(245,158,11,.35);border-left:4px solid var(--amber);border-radius:10px;padding:18px 20px;margin:20px 0;}
.notice .nh{display:flex;align-items:center;gap:8px;color:#b45309;font-weight:700;font-size:.85rem;letter-spacing:.5px;text-transform:uppercase;margin-bottom:8px;}
.notice p{font-size:.88rem;color:#7c5618;margin:0;}

/* FAQ */
.faq dt{font-family:'Space Grotesk',sans-serif;font-weight:600;color:var(--navy);margin-top:18px;font-size:1.02rem;}
.faq dd{margin:6px 0 0;color:#334155;}

.cta-band{background:var(--navy);color:#fff;border-radius:14px;padding:30px;margin:42px 0 10px;text-align:center;}
.cta-band h3{color:#fff;font-size:1.35rem;margin-bottom:8px;}
.cta-band p{color:#cfe3f3;margin-bottom:18px;}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--sky);color:#fff;padding:13px 26px;border-radius:8px;font-weight:700;text-decoration:none;transition:background .12s,transform .12s;}
.btn:hover{background:var(--sky2);color:var(--navy);transform:translateY(-1px);}
.related{margin-top:14px;font-size:.92rem;color:var(--g600);}
.related a{font-weight:600;}

footer{background:var(--navy);color:#9fb4c9;padding:38px 0 30px;margin-top:40px;font-size:.78rem;line-height:1.7;}
footer .wrap{max-width:var(--max);}
footer a{color:#cfe3f3;}
.src{font-size:.72rem;color:#7c93aa;margin-top:16px;}