.lg{max-width:820px}.lg h1{font-size:clamp(32px,5vw,52px);letter-spacing:-1.5px}.lg-toc{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 28px}.lg-toc a{padding:7px 12px;border:1px solid #d6dece;border-radius:20px;text-decoration:none;font-size:13px;font-weight:650}
.lg-sec{margin:22px 0;scroll-margin-top:12px}.lg-big{font-size:clamp(19px,3.4vw,25px);font-weight:650;overflow-x:auto;padding:4px 0}.lg-answer{color:#1f6b3a}.lg-rule{font-size:clamp(20px,4vw,28px);font-weight:750;text-align:center;background:#eaf0df;border-radius:14px;padding:16px;margin:14px 0}
.lg-table{border-collapse:collapse;width:100%;font-size:15px}.lg-table th,.lg-table td{text-align:left;padding:10px 8px;border-bottom:1px solid #e0e5d8;vertical-align:top}.lg-table td:first-child{font-weight:700;white-space:nowrap}
.lg-list{line-height:2;font-size:17px}.lg-tip{background:#fae9dc;border-radius:12px;padding:14px 16px;line-height:1.6}.lg-warn{background:#fff0e8;color:#7a2e22;border-radius:12px;padding:12px 16px}
.lg details{border:1px solid #dfe3d6;border-radius:12px;padding:10px 14px;margin:10px 0;background:#fff}.lg summary{cursor:pointer;font-weight:700;color:#28533f}.lg details[open] summary{margin-bottom:6px}
.lg-frac{display:inline-flex;flex-direction:column;vertical-align:middle;text-align:center;margin:0 4px}.lg-frac span:first-child{border-bottom:2px solid currentColor;padding:0 4px}
.lg-quick{display:grid;gap:10px}.lg-q{display:flex;flex-wrap:wrap;align-items:center;gap:8px;background:#fff;border:1px solid #dfe3d6;border-radius:12px;padding:10px 14px}.lg-q label{margin:0;font-size:18px;font-weight:600;display:flex;align-items:center;gap:6px;flex-wrap:wrap}.lg-q input{width:80px;font-size:18px;text-align:center;padding:8px}.lg-q button{padding:9px 14px}.lg-q small{flex-basis:100%;font-size:14px}
.lg output{font-weight:700}.lg .ok{color:#1f6b3a}.lg .no{color:#a3392b}.lg-mc{margin:12px 0}.lg-opts{display:grid;grid-template-columns:1fr 1fr;gap:8px}.lg-opts button{background:#fffdf7;color:#2e4b3b;border:2px solid #d8e1cb;font-size:17px}.lg-opts button.ok{border-color:#1f6b3a;background:#e2f0dc}.lg-opts button.no{border-color:#e4c8bd;background:#fff0e8}.lg-why{margin:10px 0 4px}.lg-cheer{font-size:22px;font-weight:700}
@media(max-width:600px){.lg-opts{grid-template-columns:1fr}.lg-table td:first-child{white-space:normal}}
.rs-pick{display:block;text-align:center;font-size:18px;padding:18px}#rs-preview{display:block;max-width:100%;max-height:360px;margin:16px auto;border-radius:12px}#rs-status{font-weight:650}.rs-step{border-left:4px solid #28533f;padding:4px 0 4px 14px;margin:14px 0}.rs-step h3{margin:0}.rs-math{white-space:pre-wrap}.rs-practice{margin-top:10px}