:root{color:#202743;background:#fbfcff;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0;line-height:1.6}a{color:#5142b7}.seo-top,.seo-footer,.seo-content,.seo-hero{width:min(1120px,100% - 36px);margin-inline:auto}.seo-top{justify-content:space-between;align-items:center;gap:18px;min-height:76px;display:flex}.seo-brand{color:#202743;align-items:center;gap:9px;text-decoration:none;display:flex}.seo-brand img{border-radius:10px;width:42px;height:42px}.seo-brand span{font-size:1.12rem}.seo-brand strong{color:#7049f4}.seo-top nav,.seo-footer nav{flex-wrap:wrap;gap:8px 17px;display:flex}.seo-top nav a,.seo-footer nav a{color:#566386;font-size:.88rem;font-weight:750;text-decoration:none}.seo-hero{grid-template-columns:1.05fr .95fr;align-items:center;gap:38px;padding:38px 0 46px;display:grid}.seo-hero picture{width:100%;display:block}.seo-hero img{aspect-ratio:4/3;object-fit:cover;border-radius:28px;width:100%;box-shadow:0 18px 50px #323a641f}.eyebrow{letter-spacing:.11em;color:#7049f4;margin:0 0 10px;font-size:.78rem;font-weight:900}h1{letter-spacing:-.055em;margin:0;font-size:clamp(2.35rem,5vw,4.4rem);line-height:1.02}.lead{color:#65708d;max-width:720px;margin:22px 0 0;font-size:1.08rem}.seo-content{padding-bottom:70px}.seo-content section{margin:24px 0 42px}.seo-content h2{letter-spacing:-.035em;margin:0 0 14px;font-size:clamp(1.55rem,3vw,2.25rem);line-height:1.12}.seo-content h3{margin:0 0 7px;font-size:1.08rem}.seo-content p{color:#56627f;max-width:840px}.grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:20px;display:grid}.card{background:#fff;border:1px solid #e1e6f2;border-radius:20px;padding:19px;box-shadow:0 7px 24px #2c39630e}.card p{margin-bottom:0;font-size:.9rem}.pill-list{flex-wrap:wrap;gap:9px;padding:0;list-style:none;display:flex}.pill-list li{color:#524794;background:#f3f1ff;border:1px solid #e4dffd;border-radius:999px;padding:7px 12px;font-size:.86rem;font-weight:750}.callout{background:#f5f3ff;border:1px solid #e5dffd;border-radius:22px;padding:22px}.callout strong{color:#433a88}.breadcrumb{color:#7b86a2;margin-bottom:20px;font-size:.82rem}.breadcrumb a{color:inherit}.seo-footer{color:#7a85a0;border-top:1px solid #e3e7f1;justify-content:space-between;gap:20px;padding:24px 0 38px;font-size:.82rem;display:flex}.seo-footer p{margin:0}@media (width<=820px){.seo-top{align-items:flex-start;padding:12px 0}.seo-top nav{justify-content:flex-end}.seo-hero{grid-template-columns:1fr;padding-top:22px}.seo-hero img{aspect-ratio:16/9;order:-1}.grid{grid-template-columns:1fr}.seo-footer{display:block}.seo-footer nav{margin-top:12px}}@media (width<=560px){.seo-top{grid-template-columns:1fr;padding-bottom:6px;display:grid}.seo-top nav{scrollbar-width:none;flex-wrap:nowrap;gap:6px;width:100%;padding:2px 0 6px;display:flex;overflow-x:auto}.seo-top nav::-webkit-scrollbar{display:none}.seo-top nav a{white-space:nowrap;background:#f5f3ff;border-radius:999px;align-items:center;min-height:44px;padding:0 10px;display:inline-flex}.seo-hero{gap:22px;padding-top:14px}h1{font-size:clamp(2.15rem,11vw,2.55rem)}.seo-footer nav a{align-items:center;min-height:44px;padding:0 4px;display:inline-flex}.teacher-proof a{align-items:center;min-height:44px;display:inline-flex}}.teacher-proof{background:#f7f5ff;border:1px solid #e3defc;border-radius:20px;grid-template-columns:auto 1fr auto;align-items:center;gap:16px;margin:2px 0 34px;padding:18px 20px;display:grid}.teacher-proof-mark{color:#6d50db;background:#ebe6ff;border-radius:50%;place-items:center;width:42px;height:42px;font-size:1.15rem;font-weight:900;display:grid}.teacher-proof strong{color:#34315f;font-size:1rem;display:block}.teacher-proof p{color:#626b88;margin:3px 0 0;font-size:.9rem;line-height:1.45}.teacher-proof a{white-space:nowrap;font-size:.84rem;font-weight:800;text-decoration:none}.visual-grid{grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin:22px 0;display:grid}.visual-grid figure{text-align:center;background:#fff;border:1px solid #e4e8f2;border-radius:18px;margin:0;padding:15px 10px 12px}.visual-grid img{object-fit:contain;width:74px;height:74px;margin:0 auto 9px;display:block}.visual-grid figcaption{color:#4e5977;font-size:.8rem;font-weight:800;line-height:1.25}.seo-footer small{color:#8a92a7;margin-top:3px;display:block}@media (width<=820px){.teacher-proof{grid-template-columns:auto 1fr}.teacher-proof>a{grid-column:2}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=480px){.teacher-proof{grid-template-columns:1fr}.teacher-proof-mark{display:none}.teacher-proof>a{grid-column:auto}.visual-grid{grid-template-columns:1fr 1fr}}