.talkusun-app{max-width:760px;margin:24px auto;padding:0 12px;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:#12304a}
.talkusun-card{background:#fff;border:1px solid #d9e5ef;border-radius:18px;box-shadow:0 8px 28px rgba(16,55,85,.08);padding:20px}
.talkusun-head{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid #e5edf4;padding-bottom:14px;margin-bottom:16px}
.talkusun-brand{font-weight:800;color:#0877c9;font-size:14px}.talkusun-head h2{margin:4px 0 0;font-size:22px}
.talkusun-status{font-size:12px;background:#fff5d4;color:#765400;border-radius:20px;padding:5px 9px}
.talkusun-app label{display:block;font-weight:650;margin:10px 0 6px}
.talkusun-app input{box-sizing:border-box;width:100%;min-width:0;border:1px solid #cbd9e5;border-radius:10px;padding:12px;font-size:16px;background:#fff;color:#142b3d}
.talkusun-chat-log{height:360px;overflow-y:auto;background:#f3f8fc;border:1px solid #e0eaf2;border-radius:12px;padding:12px;margin:16px 0}
.talkusun-message{margin:0 0 12px;max-width:92%;overflow-wrap:anywhere}
.talkusun-message strong{display:block;color:#0877c9;font-size:13px;margin-bottom:3px}
.talkusun-message span{display:inline-block;background:#fff;border:1px solid #e0e8ef;border-radius:4px 14px 14px 14px;padding:9px 12px;white-space:pre-wrap}
.talkusun-message time{display:block;color:#728496;font-size:11px;margin-top:3px}
.talkusun-send-form{display:flex;gap:8px;align-items:center}.talkusun-send-form input{flex:1}
.talkusun-send-form button{border:0;border-radius:10px;background:#0877c9;color:#fff;font-size:16px;font-weight:700;padding:12px 18px;cursor:pointer}
.talkusun-send-form button:disabled{opacity:.5;cursor:wait}.talkusun-notice{font-size:12px;color:#66798b;margin-bottom:0}
@media(max-width:520px){.talkusun-card{padding:14px}.talkusun-chat-log{height:48vh;min-height:260px}.talkusun-send-form{align-items:stretch}.talkusun-send-form button{padding:10px 13px}}