.math-shortcut{display:flex;align-items:center;gap:12px;max-width:490px;margin-top:16px;padding:16px 18px;border:1px solid #71603f;border-radius:12px;background:#e9bb5d0a;transition:border-color .15s,background .15s}.math-shortcut:hover{background:#e9bb5d15;border-color:var(--gold)}.math-shortcut svg{width:25px;height:25px;flex:none;color:var(--gold)}.math-shortcut strong{display:block;font-size:14px;color:var(--text)}.math-shortcut small{display:block;font-size:11px;color:var(--muted);margin-top:2px}.math-shortcut>span:last-child{margin-left:auto;color:var(--gold);font-size:22px}.math-section{padding:72px 0 82px;background:#13171e;border-block:1px solid var(--line);scroll-margin-top:95px}.math-section .section-heading{align-items:center;margin-bottom:32px}.math-section .section-heading>p{max-width:310px;font-size:14px;line-height:1.8}.math-section h2{font-size:clamp(32px,4vw,48px)}.math-section h2 span{color:var(--gold)}.math-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.math-card{display:flex;flex-direction:column;min-width:0;padding:24px;border:1px solid #353c48;border-radius:16px;background:#1b2029;transition:transform .15s,border-color .15s,background .15s}.math-card:hover{transform:translateY(-3px);border-color:var(--gold);background:#222832}.math-card-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px}.math-grade{display:flex;align-items:baseline;gap:7px;color:var(--gold)}.math-grade b{font-size:42px;line-height:1;font-weight:750;letter-spacing:-2px}.math-grade span{font-size:12px;font-weight:650;letter-spacing:.05em}.math-pdf{border:1px solid #464e5d;border-radius:6px;color:#b5becb;font-size:10px;font-weight:700;letter-spacing:.08em;padding:4px 7px}.math-card h3{font-size:21px;color:var(--text);letter-spacing:-.025em}.math-card p{font-size:13px;margin-top:7px;color:var(--muted)}.math-card-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid #343c48;padding-top:17px;margin-top:24px}.math-card-bottom>span{font-size:11px;color:#b5becb}.math-card-bottom strong{font-size:13px;color:var(--gold);display:flex;align-items:center;gap:14px}.math-card-bottom strong span{font-size:19px;font-weight:400}.math-download-note{font-size:12px;color:var(--muted);margin-top:22px}.math-download-note strong{color:var(--text);font-weight:600}
@media(max-width:900px){.math-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.math-section .section-heading{align-items:flex-start;flex-direction:column;gap:18px}.math-section .section-heading>p{max-width:560px}}
@media(max-width:500px){.math-section{padding:48px 0 52px}.math-grid{gap:12px}.math-card{padding:17px 14px;border-radius:12px}.math-card-top{margin-bottom:22px;gap:7px}.math-grade{gap:4px}.math-grade b{font-size:34px}.math-grade span{font-size:10px}.math-pdf{font-size:9px;padding:3px 5px}.math-card h3{font-size:18px}.math-card p{font-size:12px;line-height:1.6}.math-card-bottom{flex-wrap:wrap;gap:9px;margin-top:18px;padding-top:14px}.math-card-bottom strong{font-size:12px;gap:10px}.math-shortcut{padding:13px 14px}.math-section .section-heading>p{font-size:13px}.math-download-note{font-size:11px}}
@media(prefers-reduced-motion:reduce){.math-card,.math-shortcut{transition:none}.math-card:hover{transform:none}}