.ht123-lesson-illustration{margin:20px auto 28px;text-align:center;max-width:1000px}.ht123-lesson-illustration-img{display:block;width:100%;height:auto;margin:0 auto;border:1px solid #dbe6f0;border-radius:16px;background:#fff;box-shadow:0 8px 24px rgba(31,61,92,.07)}.ht123-lesson-illustration figcaption{margin-top:9px;color:#62758a;font-size:.93em;line-height:1.55}.ht123-example{padding:10px 14px;margin:10px 0;border-left:4px solid #2d7dd2;background:#f8fbff;border-radius:8px}.ht123-lesson-nav{margin-top:24px;padding:14px 16px;background:#f4f8fc;border:1px solid #dfe8f1;border-radius:10px}