:root{--bg-page: #eef0f3;--card: #ffffff;--text: #1f2329;--text-secondary: #8f959e;--primary: #3370ff;--primary-light: #e8f0ff;--border: #e5e6eb;--danger: #f54a45;--success: #34c759}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg-page);color:var(--text)}#app{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px}.login-page{width:100%;max-width:420px}.brand{text-align:center;margin-bottom:28px}.brand-logo{display:inline-flex;align-items:flex-end;justify-content:center;gap:4px;height:48px;margin-bottom:12px}.brand-logo span{display:block;width:28px;border-radius:6px 6px 2px 2px}.brand-logo .c1{height:36px;background:linear-gradient(180deg,#ff9a3c,#ff6b35)}.brand-logo .c2{height:44px;background:linear-gradient(180deg,#ff6b8a,#e84a6f)}.brand-logo .c3{height:32px;background:linear-gradient(180deg,#5b9fff,#3370ff)}.brand-name{font-size:22px;font-weight:500;color:#646a73;letter-spacing:.02em}.login-card{background:var(--card);border-radius:8px;box-shadow:0 2px 12px #1f232914;padding:0 0 32px;overflow:hidden}.tabs{display:flex;border-bottom:1px solid var(--border)}.tab-btn{flex:1;padding:16px 12px;border:none;background:transparent;font-size:15px;color:var(--text-secondary);cursor:pointer;position:relative;transition:color .2s}.tab-btn:hover{color:var(--text)}.tab-btn.active{color:var(--primary);font-weight:500}.tab-btn.active:after{content:"";position:absolute;left:20%;right:20%;bottom:0;height:3px;background:var(--primary);border-radius:3px 3px 0 0}.tab-panel{display:none;padding:28px 32px 0}.tab-panel.active{display:block}.qr-wrap{display:flex;flex-direction:column;align-items:center}#feishu_qr_container{width:240px;height:240px;overflow:hidden;display:flex;align-items:center;justify-content:center;margin:0 auto;line-height:0;background:#fff}#feishu_qr_container>div,#feishu_qr_container iframe{width:240px!important;height:240px!important;max-width:240px!important;max-height:240px!important;overflow:hidden!important;border:none!important;display:block!important;margin:0!important;padding:0!important;box-sizing:border-box!important}#feishu_qr_container iframe{scrolling:no}.qr-hint{margin:16px 0 0;font-size:13px;color:var(--text-secondary);text-align:center}.qr-loading{width:240px;height:240px;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);font-size:14px}.qr-fallback{margin-top:12px;font-size:13px;color:var(--primary);cursor:pointer;text-align:center;border:none;background:none;text-decoration:underline}.qr-fallback:hover{opacity:.85}.field{margin-bottom:16px}.field label{display:block;margin-bottom:8px;font-size:14px;color:var(--text)}.field input{width:100%;height:40px;padding:0 12px;border:1px solid var(--border);border-radius:6px;font-size:14px;color:var(--text);background:#fff;transition:border-color .2s}.field input:focus{outline:none;border-color:var(--primary)}.captcha-row{display:flex;gap:12px;align-items:flex-end}.captcha-row .field{flex:1;margin-bottom:0}.captcha-img{height:40px;border-radius:6px;cursor:pointer;border:1px solid var(--border);flex-shrink:0}.btn-login{width:100%;height:40px;margin-top:24px;border:none;border-radius:6px;background:var(--primary);color:#fff;font-size:15px;font-weight:500;cursor:pointer;transition:opacity .2s}.btn-login:hover:not(:disabled){opacity:.9}.btn-login:disabled{opacity:.6;cursor:not-allowed}.login-error{margin:0 32px;padding:10px 32px 0;font-size:13px;color:var(--danger);text-align:center;line-height:1.5}.page-center{width:100%;max-width:720px;margin:0 auto}.page-header{text-align:center;margin-bottom:24px}.page-header h1{margin:0 0 8px;font-size:1.5rem}.page-header p{margin:0;color:var(--text-secondary);font-size:.9rem}.card{background:var(--card);border-radius:8px;box-shadow:0 2px 12px #1f232914;padding:24px;margin-bottom:16px}.card h2{margin:0 0 16px;font-size:1rem}.alert{padding:12px 14px;border-radius:6px;font-size:.9rem;margin-bottom:16px;line-height:1.5}.alert-error{background:#fff1f0;border:1px solid #ffccc7;color:var(--danger)}.alert-success{background:#f0fff4;border:1px solid #b7eb8f;color:#389e0d}.alert-info{background:var(--primary-light);border:1px solid #c5d9ff;color:var(--primary)}.json-box{background:#f7f8fa;border:1px solid var(--border);border-radius:6px;padding:14px;font-family:Consolas,Monaco,monospace;font-size:.78rem;line-height:1.45;overflow:auto;max-height:400px;white-space:pre-wrap;word-break:break-all}.user-chip{display:inline-flex;align-items:center;gap:10px;padding:8px 14px;background:#f7f8fa;border-radius:999px;border:1px solid var(--border);margin-bottom:16px}.user-chip img{width:36px;height:36px;border-radius:50%;object-fit:cover}.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.btn-ghost{padding:8px 16px;border:1px solid var(--border);border-radius:6px;background:#fff;color:var(--text);font-size:14px;cursor:pointer}.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}.btn-primary-sm{padding:8px 16px;border:none;border-radius:6px;background:var(--primary);color:#fff;font-size:14px;cursor:pointer}.loading{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;vertical-align:middle;margin-right:6px}@keyframes spin{to{transform:rotate(360deg)}}