:root{--bg:#f6f8fc;--card:#fff;--ink:#0f172a;--muted:#5b6678;--line:#e2e8f0;--acc:#2563eb;--acc2:#1d4ed8;--hero1:#0b1b3b;--hero2:#1e3a8a;--chip:#eaf0fb}
@media(prefers-color-scheme:dark){:root{--bg:#0b1220;--card:#121a2b;--ink:#e8edf6;--muted:#9aa7bd;--line:#223049;--acc:#4f8bff;--acc2:#7aa5ff;--hero1:#07101f;--hero2:#14306b;--chip:#16233b}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif}
.wrap{max-width:920px;margin:0 auto;padding:0 16px}
a{color:var(--acc)}a:hover{color:var(--acc2)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.top{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:58px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:600}
.brand b{color:var(--muted);font-weight:500}
.mark{display:grid;place-items:center;width:30px;height:30px;border-radius:8px;background:var(--acc);color:#fff;font-weight:700}
nav{display:flex;align-items:center;gap:14px;flex-wrap:wrap}nav a{color:var(--ink);text-decoration:none;font-size:15px}nav a:hover{color:var(--acc)}
.lang select{background:var(--chip);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:6px 8px;font:inherit;font-size:14px}
.hero{background:linear-gradient(135deg,var(--hero1),var(--hero2));color:#fff;padding:44px 0 56px}
.hero.small{padding:30px 0 34px}
.hero h1{margin:0 0 8px;font-size:clamp(26px,5vw,38px);line-height:1.2}
.tag{margin:0 0 20px;color:#cbd8f5;max-width:640px}.hero.small .tag{margin:0}
.search input{width:100%;padding:15px 18px;border-radius:14px;border:0;font:inherit;font-size:17px;color:#0f172a;background:#fff;box-shadow:0 8px 30px rgba(0,0,0,.25)}
.search input:focus{outline:3px solid #93b4ff}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0 6px}
.chip{border:1px solid var(--line);background:var(--chip);color:var(--ink);border-radius:999px;padding:8px 14px;font:inherit;font-size:14px;cursor:pointer}
.chip.on{background:var(--acc);border-color:var(--acc);color:#fff}
.h2{font-size:21px;margin:22px 0 10px}
.qa{background:var(--card);border:1px solid var(--line);border-radius:12px;margin:0 0 10px;overflow:hidden}
.qa summary{cursor:pointer;padding:15px 18px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px;align-items:center}
.qa summary::-webkit-details-marker{display:none}
.qa summary::after{content:"+";font-size:22px;color:var(--acc);flex:none;line-height:1}
.qa[open] summary::after{content:"-"}
.qa:target{border-color:var(--acc);box-shadow:0 0 0 3px rgba(37,99,235,.18)}
.ans{padding:0 18px 16px;position:relative}.ans p{margin:0;color:var(--ink)}
.perma{position:absolute;right:16px;bottom:10px;color:var(--muted);text-decoration:none;font-size:13px;opacity:.6}
.muted{color:var(--muted)}.small{font-size:13px}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;margin:26px 0}
.card h2{margin:0 0 10px;font-size:20px}.card h3{margin:20px 0 8px;font-size:16px}
.btn{display:inline-block;background:var(--acc);color:#fff;border:0;border-radius:10px;padding:11px 20px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--acc2);color:#fff}
.help{text-align:center}
textarea,select{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--ink);font:inherit}
textarea{resize:vertical}
.ai form{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.aiout{margin-top:14px;white-space:pre-wrap}
.aiout .a{background:var(--chip);border-radius:12px;padding:14px 16px}
.aiout .rel{margin:10px 0 0;padding:0;list-style:none}.aiout .rel li{margin:6px 0}
.two{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
@media(max-width:760px){.two{grid-template-columns:1fr}}
form label{display:block;font-weight:600;margin:0 0 14px}form label select,form label textarea{margin-top:6px;font-weight:400}
.mail{font-size:20px;font-weight:600;word-break:break-all}
.check{padding-left:20px;margin:0}.check li{margin:4px 0}
footer{margin-top:40px;border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:14px}
.foot{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
[hidden]{display:none!important}