*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f7fbff;color:#17324d;line-height:1.6}
a{text-decoration:none;color:inherit}.site-header{max-width:1180px;margin:auto;padding:22px 24px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:14px}.brand h1{margin:0;font-size:26px}.brand p{margin:2px 0 0;color:#5e7387;font-size:14px}.logo{width:52px;height:52px;border-radius:16px;background:#1667d9;color:#fff;display:grid;place-items:center;font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:12px;font-weight:700}.btn-primary{background:#1667d9;color:#fff}.btn-primary:hover{background:#0e56bb}.btn-secondary{background:#fff;border:1px solid #cfe0f3;color:#17324d}
.hero{max-width:1180px;margin:22px auto 0;padding:56px 24px;display:grid;grid-template-columns:1.4fr .8fr;gap:34px;align-items:center}
.hero-copy h2{font-size:46px;line-height:1.12;margin:12px 0 18px}.hero-copy p{font-size:19px;color:#4f677b;max-width:760px}.eyebrow{font-size:13px;font-weight:800;letter-spacing:.12em;color:#1667d9}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
.hero-card{background:linear-gradient(145deg,#ffffff,#eaf4ff);border:1px solid #d7e8f8;border-radius:24px;padding:30px;box-shadow:0 14px 40px rgba(49,99,145,.12)}.hero-card .mit{width:86px;height:86px;border-radius:50%;background:#ffcf4a;display:grid;place-items:center;font-weight:800;margin-bottom:18px}
.section{max-width:1180px;margin:0 auto;padding:48px 24px}.section-head h2{font-size:34px;margin:8px 0 24px}.grade-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.grade-card{background:#fff;border:1px solid #d9e7f5;border-radius:18px;padding:24px;display:flex;flex-direction:column;gap:8px;min-height:130px;justify-content:center}.grade-card strong{font-size:24px}.grade-card span{color:#6e8294;font-size:14px}.grade-card:hover,.grade-card.active{border-color:#69a9ee;box-shadow:0 10px 30px rgba(40,108,173,.12)}
.soft{max-width:none;background:#edf6ff}.soft .feature-grid{max-width:1180px;margin:auto}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.feature-grid article{background:#fff;border-radius:18px;padding:22px;border:1px solid #d9e7f5}.feature-grid h3{margin-top:0}
footer{max-width:1180px;margin:auto;padding:30px 24px 42px;display:flex;justify-content:space-between;color:#62798c}
.page{max-width:960px;margin:30px auto;padding:28px}.panel{background:#fff;border:1px solid #d9e7f5;border-radius:18px;padding:26px;margin-bottom:18px}.subjects{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.subject{display:block;background:#fff;border:1px solid #d9e7f5;border-radius:16px;padding:18px}.subject.disabled{opacity:.65}.back{display:inline-block;margin-bottom:18px;color:#1667d9;font-weight:700}.note{background:#fff7db;border:1px solid #f2dc87;padding:14px 16px;border-radius:12px}
@media(max-width:850px){.hero{grid-template-columns:1fr}.hero-copy h2{font-size:36px}.grade-grid{grid-template-columns:repeat(2,1fr)}.feature-grid{grid-template-columns:repeat(2,1fr)}.subjects{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.site-header{align-items:flex-start}.brand p{display:none}.hero-copy h2{font-size:31px}.grade-grid,.feature-grid,.subjects{grid-template-columns:1fr}footer{flex-direction:column;gap:6px}}