:root{color:#1d2129;font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#eef2f7;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif}body{margin:0}button,input,textarea{font:inherit}.join-shell{box-sizing:border-box;background:linear-gradient(#e8f3ff 0%,#f7f8fa 48%,#eef2f7 100%);min-height:100vh;padding:16px}.join-card{box-sizing:border-box;background:#fff;border:1px solid #e5e6eb;border-radius:12px;width:min(100%,460px);margin:0 auto;padding:22px 18px 18px;box-shadow:0 10px 30px #1d212914}.join-header{text-align:center}.eyebrow{color:#165dff;background:#e8f3ff;border-radius:999px;max-width:100%;padding:4px 10px;font-size:13px;line-height:1.4;display:inline-flex}h1,h2,p{margin:0}h1{color:#1d2129;margin-top:12px;font-size:24px;line-height:1.28}.join-header p{color:#4e5969;margin-top:8px;font-size:15px;line-height:1.6}.qr-section{justify-items:center;gap:12px;margin-top:18px;display:grid}.qr-frame{aspect-ratio:1;box-sizing:border-box;background:#fff;border:1px solid #e5e6eb;border-radius:10px;width:min(78vw,300px);padding:12px}.qr-frame img{object-fit:contain;width:100%;height:100%;display:block}.scan-tip{color:#1d2129;font-size:15px;line-height:1.6}.feedback-button{color:#4e5969;background:#fff;border:1px solid #c9cdd4;border-radius:8px;width:min(100%,300px);min-height:42px}.feedback-button:disabled{color:#00b42a;background:#f6ffed;border-color:#b7eb8f}.info-section{border-top:1px solid #e5e6eb;gap:12px;margin-top:20px;padding-top:18px;display:grid}.info-section div{background:#f7f8fa;border-radius:8px;padding:12px}.info-section h2{margin-bottom:6px;font-size:15px;line-height:1.4}.info-section p{white-space:pre-wrap;color:#4e5969;font-size:14px;line-height:1.7}.state-block{text-align:center;align-content:center;justify-items:center;gap:10px;min-height:360px;display:grid}.state-block.compact{min-height:220px;margin-top:16px}.state-block h1,.state-block h2{font-size:22px;line-height:1.35}.state-block p{color:#4e5969;line-height:1.7}.state-mark{color:#165dff;background:#e8f3ff;border-radius:50%;place-items:center;width:42px;height:42px;font-weight:700;display:grid}.spinner{border:3px solid #d7e8ff;border-top-color:#165dff;border-radius:50%;width:34px;height:34px;animation:.9s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}@media (width>=720px){.join-shell{padding:36px 16px}.join-card{padding:28px 28px 24px}}