:root{--lightningcss-light:initial;--lightningcss-dark: ;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f4f6fb;--panel:#fff;--border:#e3e8f0;--text:#26324b;--text-soft:#6b7690;--primary:#3b82f6;--primary-dark:#2563eb;--primary-soft:#eff6ff;--ok:#16a34a;--ok-soft:#f0fdf4;--err:#dc2626;--err-soft:#fef2f2;--warn:#d97706;--warn-soft:#fffbeb;--radius:14px;--shadow:0 1px 3px #10182814, 0 4px 12px #1018280f;color:var(--text);-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:15px;line-height:1.55}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;margin:0}#root{min-height:100vh}.app{flex-direction:column;max-width:860px;min-height:100vh;margin:0 auto;padding:20px 20px 60px;display:flex}.app-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;padding:8px 0 16px;display:flex}.app-header h1{letter-spacing:-.2px;margin:0;font-size:22px;font-weight:700}.header-actions{align-items:center;gap:12px;display:flex}.switch{cursor:pointer;color:var(--text-soft);align-items:center;gap:6px;font-size:13px;display:flex}.switch input{accent-color:var(--primary)}.btn{border:1px solid var(--border);background:var(--panel);color:var(--text);cursor:pointer;border-radius:10px;justify-content:center;align-items:center;gap:6px;padding:9px 16px;font-family:inherit;font-size:14px;font-weight:500;transition:all .15s;display:inline-flex}.btn:hover{border-color:var(--primary);color:var(--primary-dark)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff}.btn-ghost{color:var(--text-soft);background:0 0;border-color:#0000}.btn-ghost:hover{color:var(--primary-dark);border-color:#0000}.btn-sm{padding:5px 10px;font-size:13px}.home section{margin-bottom:28px}.home h2{color:var(--text);margin:0 0 10px;font-size:17px}.hint{color:var(--text-soft);margin:0 0 12px;font-size:13px}.hint code{background:var(--primary-soft);color:var(--primary-dark);border-radius:5px;padding:1px 6px;font-size:12px}.import-section{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px}.import-actions{flex-wrap:wrap;gap:10px;display:flex}.paste-box{margin-top:12px}.paste-box textarea{border:1px solid var(--border);resize:vertical;background:var(--bg);width:100%;color:var(--text);border-radius:10px;padding:12px;font-family:inherit;font-size:14px}.paste-actions{gap:8px;margin-top:8px;display:flex}.msg{border-radius:8px;margin-top:10px;padding:8px 12px;font-size:13px}.msg-ok{background:var(--ok-soft);color:var(--ok)}.msg-err{background:var(--err-soft);color:var(--err)}.dialogue-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;display:grid}.dialogue-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);text-align:left;cursor:pointer;box-shadow:var(--shadow);color:var(--text);flex-direction:column;gap:8px;padding:14px 16px;font-family:inherit;transition:all .15s;display:flex;position:relative}.dialogue-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 6px 16px #3b82f626}.card-title{font-size:14px;font-weight:600}.card-meta{color:var(--text-soft);gap:10px;font-size:12px;display:flex}.card-stats{flex-wrap:wrap;gap:6px;margin-top:auto;display:flex}.badge{background:var(--bg);color:var(--text-soft);border:1px solid var(--border);border-radius:999px;padding:2px 8px;font-size:11px}.badge-good{background:var(--ok-soft);color:var(--ok);border-color:#0000}.badge-warn{background:var(--warn-soft);color:var(--warn);border-color:#0000}.badge-muted{opacity:.6}.imported-card{flex-direction:row;align-items:stretch;padding:0;display:flex;overflow:hidden}.imported-card .card-body{text-align:left;cursor:pointer;color:var(--text);background:0 0;border:none;flex-direction:column;flex:1;gap:8px;padding:14px 16px;font-family:inherit;display:flex}.card-remove{color:var(--text-soft);cursor:pointer;background:0 0;border:none;padding:0 12px;font-size:14px}.card-remove:hover{color:var(--err)}.imported-section h3{color:var(--text-soft);margin:18px 0 10px;font-size:15px}.role-select h2{margin:4px 0 8px;font-size:20px}.role-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:16px 0;display:grid}.role-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;text-align:center;box-shadow:var(--shadow);padding:18px 12px;font-family:inherit;transition:all .15s}.role-card:hover{border-color:var(--primary);transform:translateY(-2px)}.role-avatar{background:var(--primary-soft);width:48px;height:48px;color:var(--primary-dark);border-radius:50%;justify-content:center;align-items:center;margin:0 auto 8px;font-size:22px;font-weight:700;display:flex}.role-name{font-size:15px;font-weight:600}.role-count{color:var(--text-soft);margin-top:4px;font-size:12px}.role-preview{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;padding:16px 20px}.role-preview h3{color:var(--text-soft);margin:0 0 10px;font-size:14px}.preview-box{flex-direction:column;gap:6px;margin-bottom:12px;display:flex}.preview-line{align-items:baseline;gap:8px;font-size:13px;display:flex}.preview-speaker{min-width:20px;color:var(--primary-dark);font-weight:700}.preview-text{color:var(--text)}.preview-more{color:var(--text-soft);text-align:center;font-size:12px}.key-phrases{flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;display:flex}.kp-label{color:var(--text-soft)}.kp-chip{background:var(--warn-soft);color:var(--warn);border:1px solid #fde68a;border-radius:999px;padding:2px 10px;font-size:12px}.practice{flex-direction:column;flex:1;min-height:0;display:flex}.practice-header{grid-template-columns:auto 1fr auto auto;align-items:center;gap:12px;margin-bottom:14px;display:grid}.practice-title{flex-direction:column;gap:2px;display:flex}.pt-title{font-size:15px;font-weight:600}.pt-role{color:var(--text-soft);font-size:12px}.progress{background:var(--border);border-radius:999px;width:120px;height:6px;overflow:hidden}.progress-bar{background:var(--primary);border-radius:999px;height:100%;transition:width .3s}.progress-text{color:var(--text-soft);white-space:nowrap;font-size:12px}.chat{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);min-height:320px;max-height:56vh;box-shadow:var(--shadow);flex-direction:column;flex:1;gap:10px;padding:18px;display:flex;overflow-y:auto}.bubble-row{flex-direction:column;max-width:78%;display:flex}.bubble-row.theirs{align-self:flex-start}.bubble-row.mine{align-self:flex-end}.bubble{background:var(--bg);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:2px;padding:9px 14px;display:flex}.bubble-row.mine .bubble{background:var(--primary-soft);border-color:#bfdbfe}.bubble-speaker{color:var(--text-soft);font-size:11px;font-weight:700}.bubble-row.mine .bubble-speaker{color:var(--primary-dark)}.bubble-text{color:var(--text);word-break:break-word;font-size:14px}.bubble-blank{color:var(--text-soft);font-style:italic}.bubble-check{color:var(--ok);font-size:11px;font-weight:600}.zh-hint{color:var(--text-soft);margin-top:2px;padding:0 4px;font-size:12px}.bubble-row.current .bubble{border-color:var(--primary);box-shadow:0 0 0 3px #3b82f61f}.input-area{flex-direction:column;gap:10px;margin-top:14px;display:flex}.answer-input{border:2px solid var(--border);resize:vertical;background:var(--panel);width:100%;color:var(--text);border-radius:12px;padding:12px 14px;font-family:inherit;font-size:15px;transition:border-color .15s}.answer-input:focus{border-color:var(--primary);outline:none}.feedback{border-radius:12px;flex-direction:column;gap:8px;padding:14px 16px;display:flex}.feedback.wrong{background:var(--err-soft);border:1px solid #fecaca}.feedback.ok{background:var(--ok-soft);border:1px solid #bbf7d0}.feedback.reveal{background:var(--primary-soft);border:1px solid #bfdbfe}.fb-title{font-size:14px;font-weight:600}.feedback.wrong .fb-title{color:var(--err)}.feedback.ok .fb-title{color:var(--ok)}.fb-detail{color:var(--text);flex-direction:column;gap:4px;font-size:13px;display:flex}.fb-got{color:var(--text-soft)}.fb-answer{font-size:15px;font-weight:500}.fb-actions{gap:8px;display:flex}.result{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px}.result h2{margin:0 0 6px;font-size:22px}.result-dialogue{color:var(--text-soft);justify-content:center;align-items:center;gap:12px;margin-bottom:20px;font-size:14px;display:flex}.result-stats{justify-content:center;gap:32px;margin:12px 0 16px;display:flex}.stat{text-align:center}.stat-value{color:var(--primary-dark);font-size:32px;font-weight:700}.stat-label{color:var(--text-soft);font-size:12px}.result-praise{text-align:center;margin:0 0 20px;font-size:15px;font-weight:500}.result-wrong{text-align:left;background:var(--bg);border-radius:10px;margin:20px 0;padding:14px 16px}.result-wrong h3{color:var(--text-soft);margin:0 0 10px;font-size:14px}.wrong-item{border-bottom:1px solid var(--border);padding:8px 0}.wrong-item:last-child{border-bottom:none}.wrong-q{gap:8px;font-size:14px;display:flex}.wrong-speaker{color:var(--primary-dark);min-width:20px;font-weight:700}.wrong-a{color:var(--err);margin-top:2px;font-size:12px}.result-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:16px;display:flex}.practice.empty{text-align:center;color:var(--text-soft);justify-content:center;align-items:center;gap:14px;padding:60px 20px}@media (width<=640px){.app{padding:12px 12px 40px}.practice-header{grid-template-columns:auto 1fr auto}.progress{display:none}.bubble-row{max-width:92%}.result-stats{gap:20px}.stat-value{font-size:26px}}.group-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;display:grid}.group-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);align-items:stretch;transition:all .15s;display:flex;position:relative;overflow:hidden}.group-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 6px 16px #3b82f626}.group-card-body{cursor:pointer;text-align:left;color:var(--text);background:0 0;border:none;flex:1;align-items:center;gap:12px;padding:16px;font-family:inherit;display:flex}.group-icon{background:var(--primary-soft);border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:20px;display:flex}.group-info{flex-direction:column;gap:4px;min-width:0;display:flex}.group-name{text-overflow:ellipsis;white-space:nowrap;font-size:14px;font-weight:600;overflow:hidden}.group-meta{color:var(--text-soft);flex-wrap:wrap;gap:8px;font-size:12px;display:flex}.rename-input{border:1px solid var(--primary);width:100%;color:var(--text);border-radius:6px;padding:4px 8px;font-family:inherit;font-size:13px}.group-actions{border-left:1px solid var(--border);flex-direction:column;display:flex}.group-btn{color:var(--text-soft);cursor:pointer;background:0 0;border:none;flex:1;padding:6px 12px;font-size:14px}.group-btn:hover{color:var(--primary-dark);background:var(--primary-soft)}.group-btn-danger:hover{color:var(--err);background:var(--err-soft)}.group-detail h2{margin:4px 0 8px;font-size:20px}.group-detail-header{align-items:baseline;gap:12px;margin-bottom:14px;display:flex}.group-detail-meta{color:var(--text-soft);font-size:13px}.group-detail.empty{text-align:center;color:var(--text-soft);background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:60px 20px}.login-page{justify-content:center;align-items:center;min-height:80vh;display:flex}.login-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);width:100%;max-width:380px;box-shadow:var(--shadow);text-align:center;padding:32px 28px}.login-logo{margin-bottom:8px;font-size:44px}.login-card h2{margin:0 0 6px;font-size:20px}.login-sub{color:var(--text-soft);margin:0 0 20px;font-size:13px}.login-card form{text-align:left;flex-direction:column;gap:14px;display:flex}.login-field{color:var(--text-soft);flex-direction:column;gap:5px;font-size:13px;display:flex}.login-field input{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:10px;padding:10px 12px;font-family:inherit;font-size:14px}.login-field input:focus{border-color:var(--primary);outline:none}.login-btn{width:100%;margin-top:4px;padding:11px}.login-tip{border-top:1px solid var(--border);color:var(--text-soft);margin-top:20px;padding-top:16px;font-size:12px}.login-tip p{margin:3px 0}.login-tip code{background:var(--primary-soft);color:var(--primary-dark);border-radius:5px;padding:1px 8px;font-size:12px}.user-chip{background:var(--primary-soft);color:var(--primary-dark);white-space:nowrap;border-radius:999px;padding:4px 12px;font-size:13px;font-weight:500}.sync-status{text-align:center;color:var(--text-soft);margin:-8px 0 16px;font-size:12px}.records-view h2{margin:0;font-size:20px}.records-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.records-list{flex-direction:column;gap:8px;margin-top:16px;display:flex}.record-item{background:var(--panel);border:1px solid var(--border);border-radius:10px;align-items:center;gap:12px;padding:12px 16px;display:flex}.record-main{flex-direction:column;flex:1;gap:4px;display:flex}.record-title{font-size:14px;font-weight:600}.record-meta{color:var(--text-soft);flex-wrap:wrap;gap:10px;font-size:12px;display:flex}.record-delete{color:var(--text-soft);cursor:pointer;background:0 0;border:none;padding:6px;font-size:14px}.record-delete:hover{color:var(--err)}@media (width<=640px){.user-chip{display:none}}.speech-toolbar{border:1px solid #dbe3ef;border-radius:12px;flex-wrap:wrap;align-items:center;gap:.65rem;margin:1rem 0;padding:.8rem;display:flex}.speech-toolbar label{align-items:center;gap:.4rem;min-width:0;display:flex}.speech-toolbar select{max-width:min(240px,55vw);font:inherit;color:#1e293b;background:#fff;border:1px solid #cbd5e1;border-radius:6px;padding:.4rem}.bubble>.btn{margin:.4rem 0 0 .5rem}.group-listening{background:#f8fafc;border:1px solid #dbe3ef;border-radius:12px;margin:0 0 1.25rem;padding:1rem}.group-listening>.hint{margin:.65rem 0 0}.listening-current{overflow-wrap:anywhere;line-height:1.6}.listening-current progress{accent-color:#2563eb;width:min(100%,280px)}