:root{
  --sky:#0284c7;--sky2:#0ea5e9;--sky-l:#38bdf8;--sun:#f59e0b;
  --bg:#f6fafe;--card:#ffffff;--txt:#0f172a;--mut:#5b7183;--bd:#e3ecf3;--ink:#0b1f2e;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,system-ui,'Segoe UI',sans-serif;background:var(--bg);color:var(--txt);line-height:1.65}
a{color:var(--sky);text-decoration:none}
.container{max-width:1080px;margin:0 auto;padding:0 1.5rem}
/* header */
header.site{position:sticky;top:0;z-index:50;background:rgba(246,250,254,.85);backdrop-filter:blur(12px);border-bottom:1px solid var(--bd)}
.hd{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.25rem;color:var(--ink);letter-spacing:-.5px}
.logo img{width:34px;height:34px}
.logo span b{color:var(--sky)}
nav.main{display:flex;align-items:center;gap:1.6rem}
nav.main a{color:var(--mut);font-weight:600;font-size:.94rem}
nav.main a:hover{color:var(--ink)}
.langsel{position:relative}
.langsel select{appearance:none;background:#fff;border:1px solid var(--bd);border-radius:8px;padding:.4rem 1.8rem .4rem .7rem;font-size:.85rem;color:var(--mut);cursor:pointer;font-weight:600}
.btn{display:inline-block;background:var(--sky);color:#fff!important;padding:.6rem 1.2rem;border-radius:9px;font-weight:700;font-size:.92rem;transition:.15s;border:none;cursor:pointer}
.btn:hover{background:#0369a1}
.btn.ghost{background:#fff;color:var(--sky)!important;border:1px solid var(--bd)}
.btn.ghost:hover{border-color:var(--sky-l)}
.btn.sun{background:var(--sun)}.btn.sun:hover{background:#d97706}
/* hero */
.hero{background:linear-gradient(180deg,#eaf6ff 0%,#f6fafe 100%);padding:5rem 0 4rem;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-120px;right:-80px;width:340px;height:340px;background:radial-gradient(circle,rgba(251,191,36,.35),transparent 70%);border-radius:50%}
.hero h1{font-size:3.1rem;font-weight:800;letter-spacing:-1.5px;max-width:760px;margin:0 auto;line-height:1.1;color:var(--ink)}
.hero p.sub{font-size:1.2rem;color:var(--mut);max-width:620px;margin:1.1rem auto 2rem}
.hero .cta{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}
.trust{margin-top:2.6rem;font-size:.8rem;color:var(--mut);text-transform:uppercase;letter-spacing:1px}
.trust b{color:var(--txt);font-weight:700}
/* sections */
section{padding:4rem 0}
h2.sec{font-size:2rem;font-weight:800;text-align:center;letter-spacing:-.8px;color:var(--ink);margin-bottom:2.5rem}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.feat{background:var(--card);border:1px solid var(--bd);border-radius:16px;padding:1.6rem;transition:.18s}
.feat:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(2,132,199,.08);border-color:#cfe3f2}
.feat .ic{width:44px;height:44px;border-radius:11px;background:linear-gradient(135deg,var(--sky-l),var(--sky));display:flex;align-items:center;justify-content:center;margin-bottom:1rem}
.feat .ic svg{width:24px;height:24px;stroke:#fff;fill:none;stroke-width:2}
.feat h3{font-size:1.15rem;margin-bottom:.4rem;color:var(--ink)}
.feat p{color:var(--mut);font-size:.93rem}
/* endpoints */
.ep{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:1.2rem 1.4rem;margin-bottom:1rem}
.ep .m{display:inline-block;background:#dcfce7;color:#15803d;font-weight:800;font-size:.7rem;padding:.15rem .5rem;border-radius:5px;margin-right:.6rem;vertical-align:middle}
.ep code.path{font-size:1.02rem;font-weight:700;color:var(--sky)}
.ep p{color:var(--mut);font-size:.92rem;margin:.4rem 0 .7rem}
pre{background:var(--ink);color:#d7ecf7;border-radius:10px;padding:.9rem 1.1rem;overflow-x:auto;font-size:.83rem;font-family:'SF Mono',Menlo,monospace}
pre .k{color:#7dd3fc}pre .s{color:#fcd34d}pre .n{color:#86efac}
/* sources */
.srcs{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}
.srcs .s{background:var(--card);border:1px solid var(--bd);border-radius:12px;padding:1.1rem}
.srcs .s b{color:var(--sky);font-size:.95rem}
.srcs .s p{color:var(--mut);font-size:.82rem;margin-top:.3rem}
/* cta band */
.band{background:linear-gradient(135deg,var(--sky),var(--sky2));border-radius:20px;padding:3rem;text-align:center;color:#fff}
.band h2{font-size:1.9rem;font-weight:800;letter-spacing:-.5px}
.band p{opacity:.92;margin:.6rem 0 1.5rem;font-size:1.05rem}
/* footer */
footer.site{background:#fff;border-top:1px solid var(--bd);padding:2.5rem 0;margin-top:2rem}
.fgrid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:2rem}
.fgrid .col h4{font-size:.8rem;text-transform:uppercase;letter-spacing:1px;color:var(--mut);margin-bottom:.8rem}
.fgrid .col a{display:block;color:var(--txt);font-size:.9rem;margin-bottom:.5rem}
.fbot{text-align:center;color:var(--mut);font-size:.82rem;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--bd)}
/* forms / dashboard */
.card{background:var(--card);border:1px solid var(--bd);border-radius:16px;padding:2rem;max-width:420px;margin:3rem auto}
.card h1{font-size:1.5rem;margin-bottom:1.3rem;color:var(--ink)}
.field{margin-bottom:1rem}.field label{display:block;font-size:.85rem;font-weight:600;color:var(--mut);margin-bottom:.35rem}
.field input{width:100%;padding:.7rem .9rem;border:1px solid var(--bd);border-radius:9px;font-size:.95rem}
.field input:focus{outline:none;border-color:var(--sky-l);box-shadow:0 0 0 3px rgba(56,189,248,.15)}
.stat{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:1.3rem;flex:1}
.stat .lbl{font-size:.8rem;color:var(--mut);text-transform:uppercase;letter-spacing:.5px}
.stat .val{font-size:1.6rem;font-weight:800;color:var(--ink);margin-top:.3rem}
.keybox{background:var(--ink);color:#7dd3fc;font-family:monospace;padding:.9rem 1.1rem;border-radius:10px;font-size:.9rem;word-break:break-all}
@media(max-width:820px){.grid,.srcs{grid-template-columns:1fr 1fr}nav.main a:not(.btn){display:none}.hero h1{font-size:2.3rem}}
@media(max-width:520px){.grid,.srcs{grid-template-columns:1fr}}