:root{--bg:#050814;--bg2:#0d1733;--panel:rgba(13,22,48,.82);--line:rgba(129,173,255,.28);--text:#edf2ff;--muted:#9eb2db;--a:#63d5ff;--b:#9a76ff}
*{box-sizing:border-box}body{margin:0;color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif;background:radial-gradient(1100px 680px at 0% -20%,rgba(99,213,255,.2),transparent),radial-gradient(900px 540px at 100% -10%,rgba(154,118,255,.22),transparent),linear-gradient(158deg,var(--bg),var(--bg2));min-height:100vh}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line);backdrop-filter:blur(10px);position:sticky;top:0;background:rgba(7,11,24,.66);z-index:20}.logo{font-weight:900;letter-spacing:.3px}.logo span{color:var(--a)}
.topnav{display:flex;gap:14px;align-items:center}.topnav a{color:var(--text);text-decoration:none}.lang-select{background:#0f1a38;color:var(--text);border:1px solid var(--line);padding:8px;border-radius:9px}.menu-btn{display:none;background:#0f1a38;color:var(--text);border:1px solid var(--line);border-radius:10px;padding:8px 10px}
.btn{display:inline-block;text-decoration:none;border:1px solid var(--line);border-radius:11px;padding:10px 14px;background:linear-gradient(90deg,var(--a),var(--b));color:#061223;font-weight:800}.ghost{background:transparent;color:var(--text)}
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:20px;padding:26px 18px}.tag{color:var(--a)}h1{font-size:56px;line-height:1.08;margin:10px 0}.muted{color:var(--muted);line-height:1.7}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.card-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.card{padding:14px;background:var(--panel);border:1px solid var(--line);border-radius:14px}.vip{font-size:12px;color:var(--a)}
.feature-wrap{padding:0 18px 22px}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.f{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:12px}.f p{color:var(--muted)}
.footer{padding:18px;border-top:1px solid var(--line);color:var(--muted)}
.layout{display:grid;grid-template-columns:320px 1fr;gap:16px;padding:16px}.sidebar,.main{background:var(--panel);border:1px solid var(--line);border-radius:16px}.sidebar{padding:12px;height:calc(100vh - 32px);position:sticky;top:16px;overflow:auto}.main{padding:24px}
.menu,.sub{list-style:none;padding:0;margin:0}.item{display:block;padding:9px 10px;border-radius:10px;text-decoration:none;color:var(--text)}.item:hover,.item.active{background:rgba(99,213,255,.12)}.sub{margin-left:14px;border-left:1px dashed var(--line)}.sub a{display:block;color:var(--muted);padding:8px 10px;text-decoration:none}.sub a:hover{color:var(--text)}
.table{width:100%;border-collapse:collapse}.table th,.table td{border:1px solid var(--line);padding:8px}.chip{display:inline-block;padding:6px 10px;border:1px solid var(--line);border-radius:999px;color:var(--a);font-size:12px}
pre{background:#0a1430;border:1px solid var(--line);border-radius:10px;padding:10px;overflow:auto}
@media (max-width:980px){.hero,.layout{grid-template-columns:1fr}.card-grid{grid-template-columns:1fr}.sidebar{position:static;height:auto}h1{font-size:40px}.menu-btn{display:block}.topnav{display:none;position:absolute;right:16px;top:58px;flex-direction:column;background:#0e1632;border:1px solid var(--line);padding:10px;border-radius:12px}.topnav.open{display:flex}}