:root{
  --ink:#172033;
  --muted:#667085;
  --line:#e7eaf0;
  --bg:#f7f8fb;
  --card:#fff;
  --brand:#2457ff;
  --brand2:#0d2b8f;
  --accent:#ff6b35;
  --soft:#eef3ff;
  --success:#178a55;
  --shadow:0 18px 50px rgba(23,32,51,.08);
  --radius:20px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.65}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 36px));margin:auto}
.topbar{background:#101828;color:#d9e1f2;font-size:13px}
.topbar .inner{display:flex;justify-content:space-between;gap:20px;padding:8px 0}
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{height:76px;display:flex;align-items:center;gap:24px}
.logo{font-weight:900;font-size:21px;letter-spacing:-.7px;white-space:nowrap}
.logo span{color:var(--brand)}
.navlinks{display:flex;gap:20px;align-items:center;margin-left:auto;font-size:14px;font-weight:700}
.navlinks a{padding:10px 0}
.navlinks a:hover{color:var(--brand)}
.menu-btn{display:none;border:0;background:#fff;font-size:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 19px;border-radius:12px;font-weight:800;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 25px rgba(36,87,255,.22)}
.btn-dark{background:#111827;color:#fff}
.btn-outline{border-color:#cfd5df;background:#fff}
.btn-soft{background:var(--soft);color:var(--brand)}
.hero{background:linear-gradient(135deg,#f5f7ff 0%,#fff 55%,#fff7f3 100%);padding:72px 0 60px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;padding:7px 11px;border-radius:999px;background:#eaf0ff;color:var(--brand);font-weight:900;font-size:12px;letter-spacing:.4px}
h1{font-size:clamp(40px,5.5vw,68px);line-height:1.04;letter-spacing:-2.7px;margin:17px 0}
h2{font-size:clamp(28px,4vw,42px);line-height:1.12;letter-spacing:-1.5px;margin:0 0 14px}
h3{font-size:20px;line-height:1.25;margin:0 0 8px;letter-spacing:-.5px}
.lead{font-size:19px;color:#475467;max-width:720px}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:25px}
.hero-card{background:#111827;color:#fff;border-radius:28px;padding:28px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero-card:after{content:"";position:absolute;width:230px;height:230px;border-radius:50%;background:#2457ff;right:-100px;top:-110px;opacity:.6}
.score{font-size:54px;font-weight:900;letter-spacing:-2px}
.score small{font-size:18px;color:#b7c2d9}
.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px;position:relative;z-index:1}
.mini{border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:14px;background:rgba(255,255,255,.06)}
.section{padding:78px 0}
.section.alt{background:var(--bg)}
.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:30px}
.kicker{font-size:12px;font-weight:900;letter-spacing:1.4px;text-transform:uppercase;color:var(--brand)}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 8px 25px rgba(16,24,40,.035)}
.card:hover{transform:translateY(-2px);transition:.2s}
.icon{width:42px;height:42px;border-radius:12px;background:var(--soft);color:var(--brand);display:grid;place-items:center;font-weight:900;margin-bottom:18px}
.stat{font-size:30px;font-weight:900;letter-spacing:-1px}
.muted{color:var(--muted)}
.pill{display:inline-block;padding:5px 9px;border-radius:999px;background:#f2f4f7;color:#475467;font-size:12px;font-weight:800;margin:3px}
.feature{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}
.feature .card{padding:30px}
.list{margin:0;padding:0;list-style:none}
.list li{padding:9px 0;border-bottom:1px solid var(--line)}
.list li:last-child{border-bottom:0}
.quote{font-size:18px;line-height:1.6}
.quote:before{content:"“";font-size:42px;line-height:0;vertical-align:-18px;color:var(--brand);font-weight:900}
.notice{padding:14px 16px;border-radius:14px;background:#fff8e8;border:1px solid #f3dfad;color:#6b4e00}
.cta{background:#111827;color:#fff;border-radius:28px;padding:42px}
.cta p{color:#c8d0dd}
.footer{background:#0b1220;color:#c8d0dd;padding:52px 0 25px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
.footer a{color:#dce4f2}
.footer small{color:#8d99ab}
.page-hero{padding:54px 0;background:var(--bg);border-bottom:1px solid var(--line)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:15px}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:16px}
table{width:100%;border-collapse:collapse;background:#fff;min-width:700px}
th,td{padding:13px 15px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
th{background:#f7f8fb;font-weight:900}
.tag-row{margin:16px 0}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
input,select,textarea{width:100%;padding:13px 14px;border:1px solid #d5d9e1;border-radius:12px;font:inherit;background:#fff}
textarea{min-height:130px}
.form-card{max-width:760px}
.map-note{background:#f3f6ff;border:1px solid #dbe5ff;border-radius:16px;padding:18px}
.mock-shell{background:#f4f6fa;min-height:100vh}
.mock-top{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.mock-top-inner{width:min(1180px,calc(100% - 28px));margin:auto;display:flex;align-items:center;gap:15px;padding:13px 0}
.mock-progress{height:7px;background:#e9edf4;flex:1;border-radius:99px;overflow:hidden}
.mock-progress span{display:block;height:100%;background:var(--brand);width:0}
.mock-main{width:min(960px,calc(100% - 28px));margin:26px auto 70px}
.question-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:25px;margin:14px 0;box-shadow:0 6px 20px rgba(16,24,40,.035)}
.q-meta{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px;font-weight:800}
.q-text{font-size:19px;font-weight:800;line-height:1.45;margin:18px 0}
.options{display:grid;gap:9px}
.option{border:1px solid #d9dee7;border-radius:12px;padding:12px 14px;cursor:pointer;background:#fff;text-align:left;font:inherit}
.option:hover{border-color:var(--brand)}
.option.correct{border-color:#1a9a61;background:#edf9f3}
.option.wrong{border-color:#dc4b4b;background:#fff1f1}
.explain{display:none;margin-top:14px;padding:15px;border-radius:12px;background:#f7f8fb;border-left:4px solid var(--brand);font-size:14px}
.hint{display:none;margin-top:10px;padding:12px;border-radius:12px;background:#eef3ff;color:#304a9b;font-size:13px}
.reveal{display:block!important}
.mock-controls{display:flex;justify-content:space-between;gap:10px;position:sticky;bottom:0;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);padding:14px;border-top:1px solid var(--line)}
.timer{font-variant-numeric:tabular-nums;font-weight:900}
.result{display:none;background:#fff;border:1px solid var(--line);border-radius:22px;padding:30px;margin-top:20px}
.result.show{display:block}
.celebrate{position:fixed;inset:0;pointer-events:none;display:none;z-index:100}
.celebrate.show{display:block}
.confetti{position:absolute;width:8px;height:14px;animation:fall 1s ease-out forwards}
@keyframes fall{from{transform:translateY(-20px) rotate(0);opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}
.print-only{display:none}
@media print{
  .topbar,.header,.mock-top,.mock-controls,.no-print,.hero-actions,.footer,.btn{display:none!important}
  body,.mock-shell{background:#fff}
  .mock-main{width:100%;margin:0}
  .question-card{box-shadow:none;break-inside:avoid}
  .explain,.hint{display:none!important}
  .print-only{display:block}
  .result{display:none!important}
}
@media(max-width:900px){
  .navlinks{display:none}
  .menu-btn{display:block;margin-left:auto}
  .hero-grid,.feature{grid-template-columns:1fr}
  .grid-4{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  .container{width:min(var(--max),calc(100% - 24px))}
  .topbar .inner{display:block;text-align:center}
  .nav{height:66px}
  .hero{padding:48px 0}
  h1{font-size:43px;letter-spacing:-2px}
  .lead{font-size:17px}
  .section{padding:55px 0}
  .grid-3,.grid-4,.form-grid{grid-template-columns:1fr}
  .section-head{display:block}
  .cta{padding:28px}
  .footer-grid{grid-template-columns:1fr}
  .question-card{padding:18px}
}