:root{--bg:#F4F8FC;--deep:#E8F1FA;--card:#fff;--title:#0E2A44;--text:#1C3A56;--muted:#3D5C78;--blue:#1E6FD9;--light:#6BA8F0;--border:rgba(30,111,217,.26);--shadow:0 12px 28px rgba(14,42,68,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.75 system-ui,-apple-system,"Microsoft YaHei",sans-serif;overflow-x:hidden}body.locked{overflow:hidden}a{color:#0E4A9E;text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid #0E4A9E;outline-offset:2px}h1,h2,h3,p{margin-top:0}h1{font-size:24px;line-height:1.3;color:var(--title);margin-bottom:18px}h2{font-size:20px;line-height:1.45;color:var(--title);margin-bottom:14px}h3{font-size:16px;line-height:1.5;color:var(--title)}p{margin-bottom:15px}.topbar{height:62px;position:fixed;inset:0 0 auto;background:#E8F1FA;border-bottom:3px solid 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@media(max-width:380px){.brand img{max-width:42px}.menulinks{grid-template-columns:1fr}.section-head{display:block}}