.support-dialog{box-sizing:border-box;width:min(480px,calc(100% - 32px));max-height:calc(100dvh - 40px);margin:auto;padding:32px;border:1px solid #e0e7f2;border-radius:20px;background:#fff;color:#19283e;box-shadow:0 24px 80px #142d5526;outline:none;overflow:auto}
.support-dialog::backdrop{background:#1b2b4859;backdrop-filter:blur(4px)}
.support-dialog[open]{animation:none;transition:none;transform:none;opacity:1}
.support-dialog [hidden]{display:none!important}
.support-dialog .support-close{position:absolute;right:16px;top:16px;width:34px;height:34px;min-width:0;padding:0;border:0;border-radius:50%;background:#f2f5fa;color:#71829c;font:22px/1 sans-serif;cursor:pointer}
.support-dialog .support-kicker{margin:0 0 10px;color:#1761d3;font-size:12px;letter-spacing:.06em;text-align:left}
.support-dialog h2{margin:0 0 12px;font-size:26px;line-height:1.4;text-align:left}
.support-dialog p{max-width:none;margin:0 0 20px;font-size:14px;line-height:1.7;text-align:left}
.support-dialog .support-context{color:#65758b}
.support-dialog .support-status{color:#1761d3;overflow-wrap:anywhere}
.support-dialog .support-status:empty{display:none}
.support-dialog label{display:block;margin:16px 0 8px;font-size:14px;font-weight:600;color:#243650;text-align:left}
.support-dialog label span{margin-left:6px;color:#8a97a9;font-size:12px;font-weight:400}
.support-dialog textarea,.support-dialog input{box-sizing:border-box;display:block;width:100%;max-width:100%;padding:12px 14px;border:1px solid #dce4f1;border-radius:9px;background:#f9fbfe;color:#19283e;line-height:1.65;outline:none;resize:vertical}
.support-dialog textarea{min-height:130px;font-family:inherit;font-size:15px}
.support-dialog input{min-height:46px;font-family:inherit;font-size:15px}
.support-dialog textarea:focus,.support-dialog input:focus{border-color:#1761d3;box-shadow:0 0 0 3px #1761d31a}
.support-dialog .support-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:24px}
.support-dialog .button{min-height:44px;padding:10px 20px;font-size:14px;border-radius:8px}
.support-dialog button:focus-visible,.feedback-link:focus-visible{outline:2px solid #1761d3;outline-offset:3px}
.support-dialog button:disabled{opacity:.6;cursor:wait}
.feedback-link{display:inline-flex;align-items:center;min-height:44px;margin-top:12px;padding:6px 0;border:0;background:transparent;color:#65758b;font:inherit;font-size:13px;cursor:pointer;text-decoration:none}
.feedback-link:hover{color:#1761d3}
.course-support-links{display:flex;gap:24px;margin-top:8px}
.support-dialog .support-wechat{display:grid;grid-template-columns:1fr auto;align-items:center;gap:8px 20px;padding:20px;border:1px solid #dfe8f5;border-radius:12px;background:#f6f9ff;margin-bottom:16px}
.support-wechat span{color:#7c8ca2;font-size:12px}
.support-wechat strong{grid-column:1;font:700 26px/1.3 system-ui,sans-serif;color:#1761d3;letter-spacing:.02em;user-select:all}
.support-wechat button{grid-column:2;grid-row:1/3;min-height:44px;padding:10px 12px;border:1px solid #ccdaf0;border-radius:8px;background:white;color:#1761d3;font-size:13px;cursor:pointer}
.support-dialog .support-contact-note{margin-bottom:0;color:#7b8a9e;font-size:13px}
.support-guide .guide-contact .button{margin-top:16px}
.member-toolbar .feedback-link{margin-top:0}
@media(max-width:520px){.support-dialog{padding:28px 22px;border-radius:16px}.support-dialog h2{font-size:23px}.support-dialog .support-wechat{grid-template-columns:1fr}.support-wechat button{grid-column:1;grid-row:auto;margin-top:6px}}