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20px;font-size:26px;font-weight:700;line-height:1.55}.math-section h3{margin:28px 0 12px;font-size:20px;font-weight:700;line-height:1.65}.math-table-wrap{margin:24px 0}.math-lesson table{border-collapse:collapse;width:100%;font-size:15px}.math-lesson th,.math-lesson td{text-align:left;border-bottom:1px solid var(--rule);vertical-align:top;padding:15px 18px}.math-lesson th{background:#edf3ef}.math-lesson th:first-child{width:52%}.math-example{border-top:2px solid var(--ink);margin:38px 0 48px;padding-top:12px;scroll-margin-top:24px}.math-example h3{margin:5px 0 18px;font-size:23px}.math-question{background:#f1f5f2;padding:22px 26px;font-size:18px}.math-example summary{cursor:pointer;border-bottom:1px solid var(--rule);padding:10px 0;font-size:15px;font-weight:600}.math-example summary:focus-visible{color:#315a4b;outline:none;text-decoration:underline}.math-example details>p{max-width:850px}.math-answer{font-size:20px;font-weight:700}.math-point{border-left:3px solid #426a54;padding-left:18px}.math-figure{border:1px solid var(--rule);max-width:620px;margin:25px 0;padding:18px 22px}.math-figure figcaption{margin-bottom:16px;font-size:14px}.math-bar-row{grid-template-columns:62px minmax(0,1fr) 66px;align-items:center;gap:12px;margin:12px 0;font-size:13px;line-height:1.5;display:grid}.math-bar-track{border-left:1px solid var(--ink);height:20px;display:block}.math-bar{background:#a9c8b7;border:1px solid #426a54;min-width:1px;height:20px;display:block}.math-bar-row>span:last-child{text-align:right}.math-product{border-top:3px solid var(--ink);background:#f1f5f2;grid-template-columns:minmax(0,1fr) 300px;gap:32px;padding:32px;display:grid}.math-product h2{font-size:28px}.math-price{font-size:34px;font-weight:700}.math-price span{margin-left:12px;font-size:13px;font-weight:400}.math-spec{font-size:14px}.math-spec>div{border-bottom:1px solid #c8d3cd;padding:10px 0}.math-spec dt{font-weight:700}.math-spec dd{margin:3px 0}.math-product__preview{margin-top:8px}.math-product__preview img{border:1px solid #c8d3cd;width:100%;height:auto;display:block}.math-product__preview figcaption{margin-top:12px;font-size:12px;line-height:1.7}.math-contents{border-top:1px solid var(--rule);grid-column:1/-1}.math-contents__chapters{grid-template-columns:1fr 1fr;gap:22px;display:grid}.math-contents h4{font-size:16px;font-weight:700}.math-contents ol{margin:10px 0 0 25px;font-size:14px;list-style:decimal}.math-related{border-top:1px solid var(--rule);padding:24px 0}.math-related h2{font-size:22px}.home-topic-material{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);justify-content:space-between;align-items:center;gap:20px;margin:24px 0 40px;padding:24px 0;display:flex}.home-topic-material h2{font-size:22px;font-weight:700}.home-topic-material p{margin-top:10px}.home-topic-material a{text-underline-offset:4px;white-space:nowrap;text-decoration:underline}@media (max-width:700px){.math-lesson{padding:20px 18px 45px;font-size:16px}.math-hero{padding-top:22px}.math-lead{font-size:18px}.math-desktop-break{display:none}.math-actions{gap:16px}.math-toc{gap:10px 20px}.math-section{margin-top:38px}.math-section h2{font-size:23px}.math-lesson th,.math-lesson td{padding:11px 9px;font-size:13px}.math-question{padding:18px;font-size:17px}.math-figure{padding:15px 12px}.math-bar-row{grid-template-columns:54px minmax(0,1fr) 60px;gap:7px}.math-product{grid-template-columns:1fr;gap:22px;margin-left:-4px;margin-right:-4px;padding:22px 18px}.math-product h2{font-size:24px}.math-product .btn{width:100%;padding-left:8px;padding-right:8px;font-size:14px}.math-product__preview{justify-self:center;max-width:280px}.math-contents__chapters{grid-template-columns:1fr}.home-topic-material{display:block}.home-topic-material>a{margin-top:14px;display:inline-block}}.math-question-index{grid-template-columns:1fr 1fr;gap:8px 24px;margin:20px 0;font-size:14px;display:grid}.math-angle-figure{max-width:480px;margin:24px auto}.math-angle-figure img{width:100%;height:auto}.math-angle-figure figcaption{color:var(--muted);text-align:center;font-size:12px}.math-actions .btn{white-space:normal;text-align:center}@media (max-width:700px){.math-question-index{grid-template-columns:1fr}.math-actions .btn{padding:13px 16px;font-size:14px}.math-bar-row{font-size:12px}}.home-practice-links{flex-direction:column;gap:12px;display:flex}
