.study-intro{padding-block:36px!important;max-width:1050px}.study-grade{padding-block:40px!important;border-top:1px solid #d9e4e6}.study-grade:nth-of-type(2n){background:#edf5f4}.study-grade .wrap{max-width:1050px}.unit-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;list-style-position:inside;padding:0}.unit-grid li{padding:16px 18px;border:1px solid #cbdde0;border-radius:12px;background:#fff}.unit-grid a{font-weight:700;line-height:1.7}.unit-grid small,.video-list small{display:block;color:#526c7b;font-size:12px;margin-top:4px}.video-list li{padding:10px 0;line-height:1.8}.study-grade details{background:#fff;border:1px solid #cbdde0;padding:18px;margin-block:24px;border-radius:12px}.study-grade summary{cursor:pointer;font-weight:700}.back-top{display:inline-block;margin-top:16px}.dialogue{max-width:850px!important}.dialogue dt{font-weight:800;margin-top:23px;color:#076d68}.dialogue dd{margin:0;padding-bottom:15px;border-bottom:1px solid #dce6e8}.dialogue dd p{margin-block:7px}.study-tip{background:#fff3ce;border-left:4px solid #b88717;padding:16px;margin-top:22px}.study-links{background:#eaf5f1;padding:24px!important}.study-links .wrap{max-width:1120px}.study-links h2{font-size:25px}.study-links a{display:inline-block;margin:5px 10px 5px 0;padding:10px 14px;background:#fff;border:1px solid #abc5c8;border-radius:8px;font-weight:700}@media(max-width:650px){.unit-grid{grid-template-columns:1fr}.study-grade h2{font-size:28px}.study-intro{padding-inline:20px}.dialogue dd{margin:0}.study-grade .actions{display:grid}}.unit-grid .unit-video{display:block;font-size:13px;font-weight:500;margin-top:9px;text-decoration:underline;color:#075c67}