:root{--bg: #f6f8fb;--surface: #ffffff;--ink: #0f1b2d;--muted: #5b6b80;--line: #e3e9f1;--brand: #1552d0;--brand-dark: #0e3fa6;--accent: #0fa36b;--accent-soft: #e6f7ef;--danger: #d23b3b;--danger-soft: #fdecec;--radius: 14px;--shadow: 0 1px 2px rgba(15, 27, 45, .06), 0 8px 24px rgba(15, 27, 45, .07)}*{box-sizing:border-box}:focus-visible{outline:3px solid var(--brand);outline-offset:2px;border-radius:4px}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.6}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%}.wrap{max-width:1040px;margin:0 auto;padding:0 16px}.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}.logo{font-weight:800;font-size:1.2rem;color:var(--ink);letter-spacing:-.02em}.logo:hover{text-decoration:none}.logo .tick{color:var(--accent)}.nav a{margin-left:18px;font-size:.92rem;color:var(--muted);font-weight:600}.nav a:hover{color:var(--brand)}.hero{padding:56px 0 40px;text-align:center}.hero h1{font-size:clamp(1.8rem,4.5vw,2.8rem);line-height:1.15;letter-spacing:-.03em;margin:0 0 14px}.hero h1 em{color:var(--brand);font-style:normal}.hero p{color:var(--muted);max-width:640px;margin:0 auto 8px;font-size:1.05rem}.hero .stats{display:flex;gap:26px;justify-content:center;margin-top:22px;flex-wrap:wrap}.hero .stat{font-size:.9rem;color:var(--muted)}.hero .stat strong{display:block;font-size:1.35rem;color:var(--ink)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;padding:8px 0 48px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:transform .12s ease,box-shadow .12s ease;display:block;color:var(--ink)}.card:hover{transform:translateY(-2px);text-decoration:none;box-shadow:0 4px 10px #0f1b2d14,0 14px 32px #0f1b2d1a}.card .flag{font-size:1.9rem}.card h3{margin:8px 0 4px;font-size:1.05rem}.card p{margin:0;color:var(--muted);font-size:.86rem}.chips{display:flex;flex-wrap:wrap;gap:8px;padding:6px 0 36px}.chip{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:.88rem;font-weight:600;color:var(--ink)}.chip:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}.section{padding:10px 0 34px}.section h2{font-size:1.4rem;letter-spacing:-.02em;margin:0 0 10px}.section p,.section li{color:#33425a;font-size:.98rem}.breadcrumb{font-size:.85rem;color:var(--muted);padding:18px 0 0}.breadcrumb a{color:var(--muted)}.page-head{padding:10px 0 18px}.page-head h1{font-size:clamp(1.5rem,3.6vw,2.2rem);margin:6px 0 8px;letter-spacing:-.02em}.page-head .sub{color:var(--muted);max-width:700px}.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:18px 0 8px}.fact{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:12px 14px}.fact .k{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.fact .v{font-weight:800;font-size:1.05rem}.disclaimer{font-size:.82rem;color:var(--muted);border-left:3px solid var(--line);padding:6px 12px;margin:28px 0 40px}.quiz-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;margin:10px 0 26px}.quiz-card.center{text-align:center}.quiz-title{margin:0 0 10px;font-size:1.25rem}.quiz-meta{list-style:none;padding:0;margin:0 0 18px;color:var(--muted);font-size:.95rem}.quiz-meta li{padding:3px 0}.quiz-top{display:flex;justify-content:space-between;font-size:.85rem;color:var(--muted);font-weight:600}.progress{height:6px;background:var(--line);border-radius:999px;margin:10px 0 18px;overflow:hidden}.progress-fill{height:100%;background:var(--brand);border-radius:999px;transition:width .25s ease}.question{font-size:1.12rem;margin:0 0 16px;line-height:1.45}.sign-box{display:grid;place-items:center;margin:4px 0 14px}.sign-box svg{width:96px;height:96px;filter:drop-shadow(0 2px 6px rgba(15,27,45,.18))}.options{display:grid;gap:10px}.option{display:flex;align-items:center;gap:12px;text-align:left;width:100%;background:var(--bg);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;font-size:.98rem;font-family:inherit;color:var(--ink);cursor:pointer;transition:border-color .12s ease,background .12s ease}.option:hover:not(:disabled){border-color:var(--brand);background:#eef3ff}.option:disabled{cursor:default}.option.correct{border-color:var(--accent);background:var(--accent-soft)}.option.wrong{border-color:var(--danger);background:var(--danger-soft)}.option.dim{opacity:.55}.opt-letter{flex:0 0 28px;height:28px;display:grid;place-items:center;background:var(--surface);border:1px solid var(--line);border-radius:8px;font-weight:700;font-size:.85rem}.explain{margin-top:16px;border-radius:12px;padding:12px 14px;font-size:.93rem}.explain.ok{background:var(--accent-soft);border:1px solid #bfe9d6}.explain.bad{background:var(--danger-soft);border:1px solid #f3c6c6}.btn{display:inline-block;border:0;border-radius:12px;padding:12px 22px;font-size:1rem;font-weight:700;font-family:inherit;cursor:pointer}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark)}.btn.next{margin-top:16px}.result-badge{display:inline-block;padding:8px 20px;border-radius:999px;font-weight:800;letter-spacing:.06em;margin-bottom:10px}.result-badge.pass{background:var(--accent-soft);color:#0b7a50}.result-badge.fail{background:var(--danger-soft);color:brown}.result-score{font-size:2rem;font-weight:800;margin:6px 0}.result-score span{font-size:1.1rem;color:var(--muted);font-weight:600}.result-note{color:var(--muted);max-width:440px;margin:0 auto 18px}.start-row{display:flex;gap:10px;flex-wrap:wrap}.center-row{justify-content:center}.btn-secondary{background:var(--bg);color:var(--brand);border:1.5px solid var(--brand)}.btn-secondary:hover{background:#eef3ff}.review{text-align:left;margin-top:22px;border-top:1px solid var(--line);padding-top:6px}.review-item{border-bottom:1px solid var(--line);padding:14px 0}.review-q{font-weight:700;margin:0 0 6px}.review-a{margin:2px 0;font-size:.93rem}.bad-x{color:var(--danger);font-weight:800;margin-right:6px}.ok-check{color:var(--accent);font-weight:800;margin-right:6px}.review-ex{margin:6px 0 0;font-size:.88rem;color:var(--muted)}.ad-slot{min-height:90px;display:grid;place-items:center;margin:22px 0;border:1px dashed var(--line);border-radius:12px;color:#aab6c6;font-size:.8rem}.site-footer{border-top:1px solid var(--line);background:var(--surface);margin-top:40px}.footer-grid{padding:30px 16px;display:grid;grid-template-columns:1fr 1fr;gap:28px;font-size:.86rem;color:var(--muted)}.footer-col strong{color:var(--ink);display:block;margin-bottom:10px}.footer-links{display:flex;flex-wrap:wrap;gap:6px 16px}.footer-links a{color:var(--muted)}.footer-links a:hover{color:var(--brand)}.footer-note{margin-top:14px;max-width:420px;font-size:.8rem}@media(max-width:640px){.footer-grid{grid-template-columns:1fr}}@media(max-width:560px){.nav{display:none}.quiz-card{padding:18px}}