/* ===== AI家庭教育助手 - 全局样式 ===== */

:root {
  --pri: #4F46E5;
  --pri-dark: #4338CA;
  --pri-light: #EEF2FF;
  --pri-gradient: linear-gradient(135deg, #4F46E5, #7C3AED);
  --danger: #EF4444;
  --warning: #F59E0B;
  --success: #10B981;
  --text: #1F2937;
  --text-secondary: #6B7280;
  --text-light: #9CA3AF;
  --bg: #F3F4F6;
  --white: #FFFFFF;
  --border: #E5E7EB;
  --radius: 12px;
  --radius-lg: 16px;
  --shadow: 0 2px 12px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.08);
}

*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);max-width:480px;margin:0 auto;min-height:100vh;position:relative;-webkit-tap-highlight-color:transparent}

/* 导航栏 */
.navbar{
  position:sticky;top:0;z-index:100;
  background:var(--pri-gradient);
  color:#fff;padding:14px 16px;
  display:flex;align-items:center;justify-content:space-between;
  font-size:17px;font-weight:600;
}
.navbar .back{font-size:22px;cursor:pointer;width:32px;text-align:left}
.navbar .title{text-align:center;flex:1}
.navbar .action{font-size:22px;cursor:pointer;width:32px;text-align:right;opacity:.8}

/* 页面容器 */
.page{display:none;padding-bottom:80px}
.page.active{display:block}
.container{padding:16px}

/* 按钮 */
.btn{
  display:block;width:100%;padding:14px 24px;
  border:none;border-radius:25px;font-size:16px;font-weight:600;
  cursor:pointer;text-align:center;transition:.2s;
}
.btn-primary{background:var(--pri-gradient);color:#fff}
.btn-primary:active{transform:scale(.98);opacity:.9}
.btn-outline{border:1.5px solid var(--pri);color:var(--pri);background:transparent}
.btn-danger{background:var(--danger);color:#fff}
.btn-sm{padding:8px 16px;font-size:13px;width:auto;display:inline-block}
.btn:disabled{opacity:.5;pointer-events:none}

/* 卡片 */
.card{background:var(--white);border-radius:var(--radius-lg);padding:16px;margin-bottom:12px;box-shadow:var(--shadow)}
.card-title{font-size:16px;font-weight:700;margin-bottom:12px;color:var(--text)}

/* 进度条 */
.progress{height:6px;background:var(--border);border-radius:3px;margin:12px 0;overflow:hidden}
.progress .bar{height:100%;background:var(--pri-gradient);border-radius:3px;transition:.5s}

/* 标签 */
.tag{display:inline-block;padding:10px 18px;border-radius:22px;font-size:14px;cursor:pointer;margin:5px;border:1.5px solid var(--border);background:var(--white);color:var(--text);transition:.2s;user-select:none}
.tag.selected{background:var(--pri);color:#fff;border-color:var(--pri)}
.tag.disabled{opacity:.4;pointer-events:none}

/* 底部Tab */
.tabbar{
  position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:480px;
  height:56px;background:var(--white);border-top:1px solid var(--border);
  display:flex;z-index:99;
}
.tabbar .tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-light);font-size:11px;cursor:pointer;transition:.2s}
.tabbar .tab.active{color:var(--pri)}
.tabbar .tab .icon{font-size:22px;margin-bottom:2px}

/* 选中指标 */
.badge{display:inline-block;background:var(--pri-light);color:var(--pri);padding:3px 10px;border-radius:12px;font-size:12px;font-weight:600}

/* 加载 */
.loading{text-align:center;padding:40px;color:var(--text-secondary);font-size:14px}
.loading .spinner{width:36px;height:36px;border:3px solid var(--border);border-top-color:var(--pri);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}

/* Toast */
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#1F2937;color:#fff;padding:12px 24px;border-radius:8px;font-size:14px;z-index:999;opacity:0;transition:.3s;pointer-events:none}
.toast.show{opacity:1}
.toast.error{background:var(--danger)}

/* RD输入 */
input[type="text"],input[type="tel"],input[type="password"],input[type="number"],textarea{
  width:100%;padding:12px 16px;border:1.5px solid var(--border);border-radius:var(--radius);
  font-size:15px;outline:none;transition:.2s;background:var(--white);font-family:inherit
}
input:focus,textarea:focus{border-color:var(--pri);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
textarea{resize:vertical;min-height:80px}

/* 弹窗 */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:200;display:flex;align-items:center;justify-content:center;padding:24px}
.modal{background:var(--white);border-radius:var(--radius-lg);padding:24px;width:100%;max-width:360px;text-align:center}
.modal h3{font-size:18px;margin-bottom:12px}
.modal p{color:var(--text-secondary);margin-bottom:20px;font-size:14px;line-height:1.6}
.modal .btn{margin:6px 0}

/* 空状态 */
.empty{text-align:center;padding:60px 20px;color:var(--text-light)}
.empty .icon{font-size:48px;margin-bottom:12px}
.empty p{font-size:14px}

/* 分割线 */
.divider{height:1px;background:var(--border);margin:16px 0}

/* 风险标签 */
.risk-tag{padding:6px 14px;border-radius:20px;font-size:13px;font-weight:600;display:inline-block}
.risk-tag.low{background:#ECFDF5;color:#065F46}
.risk-tag.medium{background:#FFF7ED;color:#9A3412}
.risk-tag.high{background:#FEF2F2;color:#991B1B}

/* 对话气泡 */
.chat-area{min-height:300px}
.chat-msg{display:flex;margin:12px 0;gap:8px;animation:fadeIn .3s}
.chat-msg.right{flex-direction:row-reverse}
.chat-msg .avatar{width:36px;height:36px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:20px}
.chat-msg.left .avatar{background:#EDE9FE;color:#7C3AED}
.chat-msg.right .avatar{background:#DBEAFE;color:#2563EB}
.chat-msg .bubble{padding:12px 16px;border-radius:18px;max-width:75%;font-size:14px;line-height:1.6;word-break:break-word}
.chat-msg.left .bubble{background:#F5F3FF;color:var(--text);border-bottom-left-radius:4px}
.chat-msg.right .bubble{background:var(--pri);color:#fff;border-bottom-right-radius:4px}
.chat-msg .sys{background:#FFF9E6;border-radius:8px;padding:10px 14px;font-size:12px;color:#B45309;width:85%;margin:4px auto;text-align:center}
.chat-msg .stars{color:#F59E0B;font-size:16px}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* 录音按钮 */
.voice-btn{
  display:flex;align-items:center;justify-content:center;
  height:52px;background:var(--pri-gradient);border-radius:26px;
  color:#fff;font-size:16px;font-weight:600;cursor:pointer;
  margin-top:16px;transition:.2s;user-select:none
}
.voice-btn:active{transform:scale(.97)}
.voice-btn.recording{background:var(--danger);animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}

/* 统计卡片 */
.stat-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stat-card{background:var(--white);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.stat-card .num{font-size:24px;font-weight:700;color:var(--pri)}
.stat-card .lbl{font-size:12px;color:var(--text-light);margin-top:4px}

/* 表单 */
.form-group{margin-bottom:16px}
.form-group label{display:block;font-size:14px;font-weight:600;margin-bottom:6px;color:var(--text)}
.form-group .hint{font-size:12px;color:var(--text-light);margin-top:4px}

/* 隐藏 */
.hidden{display:none !important}

/* 管理端头部 */
.admin-header{
  background:linear-gradient(135deg,#1F2937,#374151);
  color:#fff;border-radius:var(--radius-lg);padding:20px;margin-bottom:16px
}
.admin-header .greet{font-size:13px;opacity:.7}
.admin-header .name{font-size:20px;font-weight:700;margin:4px 0}
.admin-header .sub{font-size:13px;opacity:.85;margin-top:4px}