.study-install-button{font:600 14px/1.4 system-ui,"Microsoft YaHei",sans-serif;min-height:44px;padding:9px 14px;border:1px solid #d8c8eb;border-radius:14px;background:#f7f0ff;color:#65468c;cursor:pointer;white-space:nowrap}.study-install-button[hidden]{display:none}.login-shell>.study-install-button{display:block;margin:18px auto}.study-install-dialog{box-sizing:border-box;width:min(92vw,480px);max-height:85dvh;overflow:auto;padding:26px;border:1px solid #e4d7ed;border-radius:22px;background:#fffdf8;color:#55416e;font:16px/1.8 system-ui,"Microsoft YaHei",sans-serif;box-shadow:0 18px 80px #44305d33}.study-install-dialog::backdrop{background:#30213c70}.study-install-dialog h2{font-size:24px;margin:0 0 12px}.study-install-dialog p{margin:12px 0}.study-install-dialog button{float:right}.study-install-dialog:focus{outline:2px solid #7955b5}