*{margin:0;padding:0;box-sizing:border-box}
    :root{
      --primary:#2563eb;--primary-dark:#1d4ed8;--accent:#60a5fa;
      --success:#10b981;--warning:#f59e0b;--danger:#ef4444;--info:#3b82f6;
      --dark:#1e3a5f;--gray:#64748b;--light:#f1f5f9;--bg:#f8fafc;
      --radius:12px;--shadow:0 2px 12px rgba(0,0,0,.08);
    }
    body{
      font-family:'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;
      background:var(--bg);color:var(--dark);min-height:100vh;
      background-image:
        repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(37,99,235,0.03) 60px, rgba(37,99,235,0.03) 61px),
        repeating-linear-gradient(0deg, transparent, transparent 60px, rgba(37,99,235,0.03) 60px, rgba(37,99,235,0.03) 61px);
    }

    /* Header */
    .header{
      background:linear-gradient(135deg,#2563eb,#1e40af);
      color:#fff;padding:0 24px;height:56px;
      display:flex;align-items:center;justify-content:space-between;
      box-shadow:0 2px 20px rgba(37,99,235,.3);
      position:sticky;top:0;z-index:100;
    }
    .header-brand{display:flex;align-items:center;gap:10px}
    .header-brand .logo-icon{
      width:36px;height:36px;background:rgba(255,255,255,.2);
      border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:18px;
    }
    .header-brand h1{font-size:16px;font-weight:700}
    .header-user{display:flex;align-items:center;gap:12px}
    .header-user .user-name{font-weight:600;font-size:13px}
    .header-user .user-role{font-size:11px;opacity:.8}
    .btn-logout{
      background:rgba(255,255,255,.2);border:none;color:#fff;
      padding:6px 14px;border-radius:6px;cursor:pointer;font-size:12px;transition:.2s;
    }
    .btn-logout:hover{background:rgba(255,255,255,.35)}

    /* Alert Banner */
    .alert-banner{
      display:none;align-items:center;justify-content:space-between;
      padding:10px 24px;font-size:13px;font-weight:600;gap:12px;
      animation:alertSlideDown .35s ease-out;
    }
    .alert-banner.show{display:flex}
    @keyframes alertSlideDown{from{opacity:0;transform:translateY(-100%)}to{opacity:1;transform:translateY(0)}}
    .alert-banner.blue{background:#e3f2fd;color:#0d47a1;border-bottom:2px solid #1976d2}
    .alert-banner.yellow{background:#fff8e1;color:#e65100;border-bottom:2px solid #ff8f00}
    .alert-banner.orange{background:#fff3e0;color:#bf360c;border-bottom:2px solid #e65100}
    .alert-banner.red{background:#ffebee;color:#b71c1c;border-bottom:2px solid #d50000}
    .alert-banner-icon{font-size:22px;flex-shrink:0}
    .alert-banner-text{flex:1;min-width:0}
    .alert-banner-text .alert-type{font-size:12px;opacity:.8}
    .alert-banner-btn{
      background:inherit;border:1px solid;padding:4px 12px;
      border-radius:4px;cursor:pointer;font-size:12px;font-weight:600;
      flex-shrink:0;transition:.2s;
    }
    .alert-banner-btn:hover{opacity:.8}
    .alert-close-btn{
      background:none;border:none;font-size:18px;cursor:pointer;
      flex-shrink:0;opacity:.6;line-height:1;
    }
    .alert-close-btn:hover{opacity:1}

    /* Alert weather-bar indicator */
    .alert-indicator{
      display:none;align-items:center;gap:8px;
      margin-top:8px;padding:8px 14px;
      background:rgba(255,255,255,.2);border-radius:8px;
      font-size:12px;font-weight:600;
    }
    .alert-indicator.show{display:flex}
    .alert-indicator .alert-dot{width:8px;height:8px;border-radius:50%;animation:blinkDot 1s infinite}
    @keyframes blinkDot{0%,100%{opacity:1}50%{opacity:.3}}

    /* Weather Alert Modal */
    .warn-modal{
      position:fixed;top:0;left:0;width:100%;height:100%;
      background:rgba(0,0,0,.55);backdrop-filter:blur(6px);
      display:none;align-items:center;justify-content:center;z-index:2000;
    }
    .warn-modal.show{display:flex}
    .warn-dialog{
      background:#fff;border-radius:20px;width:92%;max-width:460px;
      max-height:85vh;overflow-y:auto;
      animation:warnBounceIn .35s cubic-bezier(.21,1.02,.73,1);
    }
    @keyframes warnBounceIn{
      from{opacity:0;transform:scale(.7) translateY(-40px)}
      60%{transform:scale(1.02) translateY(0)}
      to{opacity:1;transform:scale(1) translateY(0)}
    }
    .warn-dialog.red{border-top:6px solid #d50000}
    .warn-dialog.orange{border-top:6px solid #e65100}
    .warn-dialog.yellow{border-top:6px solid #ff8f00}
    .warn-dialog.blue{border-top:6px solid #1976d2}
    .warn-header{
      padding:24px 24px 16px;text-align:center;
    }
    .warn-header .warn-icon{font-size:56px}
    .warn-header .warn-severity{
      display:inline-block;padding:4px 16px;border-radius:20px;
      font-size:12px;font-weight:700;letter-spacing:1px;margin-top:8px;
    }
    .warn-severity.red{background:#ffebee;color:#d50000}
    .warn-severity.orange{background:#fff3e0;color:#e65100}
    .warn-severity.yellow{background:#fff8e1;color:#ff8f00}
    .warn-severity.blue{background:#e3f2fd;color:#1976d2}
    .warn-body{padding:8px 24px 24px;font-size:14px;line-height:1.7;color:#444}
    .warn-body h2{font-size:20px;font-weight:700;color:var(--dark);margin-bottom:8px;text-align:center}
    .warn-body .warn-time{font-size:12px;color:#999;margin-bottom:16px;text-align:center}
    .warn-footer{
      padding:14px 24px;border-top:1px solid #eee;
      display:flex;gap:10px;justify-content:center;
    }

    /* Layout */
    .container{max-width:1400px;margin:0 auto;padding:20px}
    .grid{display:grid;grid-template-columns:220px 1fr;gap:20px}

    /* Sidebar */
    .sidebar{
      background:#fff;border-radius:var(--radius);padding:12px;
      box-shadow:var(--shadow);height:fit-content;position:sticky;top:76px;
    }
    .nav-item{
      display:flex;align-items:center;gap:10px;padding:11px 14px;
      border-radius:8px;cursor:pointer;transition:.2s;margin-bottom:2px;
      color:var(--gray);font-size:13px;font-weight:500;
    }
    .nav-item:hover{background:var(--light);color:var(--primary)}
    .nav-item.active{
      background:linear-gradient(135deg,var(--primary),#764ba2);
      color:#fff;box-shadow:0 4px 12px rgba(102,126,234,.3);
    }
    .nav-item .icon{font-size:16px;width:22px;text-align:center}

    /* Main */
    .main-content{display:flex;flex-direction:column;gap:20px}

    /* Cards */
    .card{
      background:#fff;border-radius:var(--radius);padding:20px;
      box-shadow:var(--shadow);transition:.25s;
    }
    .card-header{
      display:flex;align-items:center;justify-content:space-between;
      margin-bottom:16px;flex-wrap:wrap;gap:10px;
    }
    .card-title{font-size:17px;font-weight:700;display:flex;align-items:center;gap:8px}

    /* Stats */
    .stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .stat-card{
      background:#fff;border-radius:var(--radius);padding:18px 20px;
      box-shadow:var(--shadow);display:flex;align-items:center;gap:14px;
      transition:.25s;cursor:pointer;
    }
    .stat-card:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.12)}
    .stat-icon-box{
      width:48px;height:48px;border-radius:12px;
      display:flex;align-items:center;justify-content:center;font-size:22px;
    }
    .stat-icon-box.blue{background:rgba(102,126,234,.15);color:var(--primary)}
    .stat-icon-box.green{background:rgba(0,217,163,.15);color:var(--success)}
    .stat-icon-box.orange{background:rgba(255,193,7,.15);color:#f0a500}
    .stat-icon-box.red{background:rgba(255,107,107,.15);color:var(--danger)}
    .stat-info .stat-val{font-size:24px;font-weight:800}
    .stat-info .stat-label{font-size:12px;color:var(--gray);margin-top:2px}

    /* Weather - 已隐藏 */
    .weather-bar-sticky{display:none !important}
    .weather-bar{display:none !important}
    .weather-left{display:flex;align-items:center;gap:16px}
    .weather-emoji{font-size:44px}
    .weather-temp{font-size:32px;font-weight:800}
    .weather-detail{font-size:13px;opacity:.9;margin-top:2px}

    /* Class Status Bar */
    .class-status-bar{
      display:flex;align-items:center;justify-content:space-between;
      background:linear-gradient(135deg,#eff6ff,#dbeafe);
      border:2px solid #bfdbfe;border-radius:var(--radius);
      padding:16px 20px;margin-bottom:14px;
      box-shadow:0 2px 8px rgba(37,99,235,.1);
    }
    .class-status-left{display:flex;align-items:center;gap:14px}
    .class-status-icon{font-size:32px}
    .class-status-main{font-size:16px;font-weight:700;color:var(--dark)}
    .class-status-sub{font-size:13px;color:var(--gray);margin-top:2px}
    .class-status-badge{
      padding:6px 16px;border-radius:20px;font-size:12px;font-weight:700;
      background:#dbeafe;color:#2563eb;
    }
    .class-status-badge.break{
      background:#d1fae5;color:#059669;
    }

    /* Pending Section */
    .pending-section{
      background:#fff;border-radius:var(--radius);padding:20px;
      box-shadow:var(--shadow);margin-top:14px;
    }
    .section-header{
      display:flex;align-items:center;justify-content:space-between;
      margin-bottom:14px;padding-bottom:12px;border-bottom:2px solid #e2e8f0;
    }
    .section-header h3{font-size:16px;font-weight:700;color:var(--dark)}
    .section-count{
      font-size:12px;color:var(--gray);background:#f1f5f9;
      padding:4px 12px;border-radius:20px;
    }
    .pending-list{
      max-height:400px;
      overflow-y:auto;
      -webkit-overflow-scrolling:touch;
    }
    .pending-empty{
      text-align:center;color:var(--gray);padding:30px;font-size:13px;
    }
    .pending-item{
      display:flex;align-items:flex-start;gap:12px;padding:14px;
      background:#f8fafc;border-radius:10px;margin-bottom:10px;
      border-left:4px solid #f59e0b;transition:.2s;
    }
    .pending-item:hover{background:#eff6ff;transform:translateX(3px)}
    .pending-item .pending-type{
      font-size:11px;padding:3px 10px;border-radius:20px;font-weight:600;
      background:rgba(37,99,235,.1);color:var(--primary);flex-shrink:0;
      margin-top:2px;
    }
    .pending-item .pending-content{flex:1;min-width:0}
    .pending-item .pending-title{font-weight:600;font-size:14px;margin-bottom:4px;color:var(--dark)}
    .pending-item .pending-body{font-size:12px;color:var(--gray);line-height:1.5;margin-bottom:4px;word-break:break-all}
    .pending-item .pending-sender{font-size:11px;color:var(--gray)}
    .pending-item .pending-actions{
      display:flex;flex-direction:column;gap:6px;flex-shrink:0;
    }
    .pending-item .pending-btn{
      padding:6px 14px;border:none;border-radius:8px;
      background:var(--primary);color:#fff;font-size:12px;font-weight:600;
      cursor:pointer;transition:.2s;flex-shrink:0;
    }
    .pending-item .pending-btn:hover{background:var(--primary-dark)}
    .pending-item .pending-status{
      font-size:11px;padding:3px 10px;border-radius:20px;font-weight:600;
      text-align:center;
    }
    .pending-status.confirmed{background:#d1fae5;color:#059669}
    .pending-status.pending{background:#fef3c7;color:#d97706}
    .pending-status.unread{background:#fee2e2;color:#dc2626}

    /* Pending item header row (sender + time) */
    .pending-item .pending-header{
      display:flex;align-items:center;gap:10px;margin-bottom:8px;flex-wrap:wrap;
    }
    .pending-item .pending-type-tag{
      font-size:11px;padding:3px 10px;border-radius:20px;font-weight:600;flex-shrink:0;
    }
    .pending-item .pending-type-tag.tag-notification{background:rgba(37,99,235,.1);color:var(--primary)}
    .pending-item .pending-type-tag.tag-call{background:rgba(239,68,68,.1);color:var(--danger)}
    .pending-item .pending-type-tag.tag-announcement{background:rgba(245,158,11,.1);color:var(--warning)}
    .pending-item .pending-sender-name{
      font-size:12px;color:var(--gray);font-weight:500;
    }
    .pending-item .pending-time{
      font-size:11px;color:var(--gray);margin-left:auto;
    }

    /* Teacher status item specific styles */
    .teacher-status-item{
      border-left-color:var(--primary) !important;
    }
    .teacher-status-item .pending-actions{
      align-items:flex-end;justify-content:center;
    }
    .status-badge{
      font-size:12px;padding:4px 12px;border-radius:20px;font-weight:600;
      display:inline-block;
    }
    .status-badge.status-confirmed{background:#d1fae5;color:#059669}
    .status-badge.status-partial{background:#fef3c7;color:#d97706}
    .status-badge.status-unread{background:#fee2e2;color:#dc2626}
    .status-badge.status-pending{background:#e0e7ff;color:#4f46e5}

    /* Confirm button styles */
    .pending-btn.confirm{
      background:var(--success);
    }
    .pending-btn.confirm:hover{
      background:#059669;
    }
    .pending-btn.detail{
      background:var(--gray);
    }
    .pending-btn.detail:hover{
      background:#475569;
    }

    /* Confirm-style pending list (matches confirm.html) */
    .pending-list.confirm-style .confirm-item{
      display:flex;gap:14px;align-items:flex-start;
      padding:16px 18px;border-left:4px solid transparent;
      transition:.25s;cursor:pointer;
    }
    .pending-list.confirm-style .confirm-item:hover{
      transform:translateX(3px);
      background:linear-gradient(135deg,rgba(102,126,234,.04),rgba(102,126,234,.01));
      border-left-color:var(--primary);
    }
    .confirm-index{
      width:32px;height:32px;border-radius:50%;
      background:var(--light);display:flex;align-items:center;
      justify-content:center;font-weight:700;font-size:14px;
      flex-shrink:0;color:var(--gray);
    }
    .confirm-body{flex:1;min-width:0}
    .confirm-header-row{
      display:flex;align-items:center;gap:8px;margin-bottom:4px;
      flex-wrap:wrap;
    }
    .confirm-title{font-size:15px;font-weight:700;color:var(--dark)}
    .confirm-type-tag{
      font-size:10px;padding:2px 8px;border-radius:20px;font-weight:700;
    }
    .confirm-content{
      font-size:13px;color:#555;line-height:1.6;margin-top:4px;
      white-space:pre-wrap;
    }
    .confirm-meta{
      font-size:11px;color:#aaa;margin-top:6px;
      display:flex;gap:12px;flex-wrap:wrap;
    }
    .confirm-actions{
      display:flex;gap:6px;flex-shrink:0;align-self:center;
      flex-direction:column;
    }
    .confirm-audio{margin-top:6px}
    .confirm-audio audio{height:28px;width:100%}

    /* Notification Section on Dashboard */
    .notif-section{
      background:#fff;border-radius:var(--radius);padding:20px;
      box-shadow:var(--shadow);margin-top:14px;
    }
    .notif-section .section-header{
      display:flex;align-items:center;justify-content:space-between;
      margin-bottom:14px;padding-bottom:12px;border-bottom:2px solid #e2e8f0;
    }
    .notif-section .section-header h3{font-size:16px;font-weight:700;color:var(--dark)}

    /* Changelog Section */
    .changelog-section{
      background:#fff;border-radius:var(--radius);padding:20px;
      box-shadow:var(--shadow);margin-top:14px;
    }
    .changelog-list{display:flex;flex-direction:column;gap:10px}
    .changelog-item{
      display:flex;align-items:center;gap:12px;padding:10px 14px;
      background:#f8fafc;border-radius:8px;font-size:13px;color:var(--dark);
    }
    .changelog-dot{
      width:8px;height:8px;border-radius:50%;background:var(--primary);flex-shrink:0;
    }
    /* 更新日志轮播样式 */
    .changelog-carousel-wrapper{
      position:relative;overflow:hidden;
      min-height:200px;
    }
    .changelog-carousel-wrapper .changelog-item{
      display:block;
      padding:14px 18px;
      background:linear-gradient(135deg,#f8fafc,#eef2ff);
      border-radius:10px;border-left:4px solid var(--primary);
      animation:fadeInSlide .5s ease-out;
    }
    @keyframes fadeInSlide{
      from{opacity:0;transform:translateX(20px)}
      to{opacity:1;transform:translateX(0)}
    }
    .changelog-carousel-wrapper .cl-version{
      font-size:14px;font-weight:700;color:var(--primary);margin-bottom:10px;
    }
    .changelog-carousel-wrapper .cl-list{
      list-style:none;padding:0;margin:0;
    }
    .changelog-carousel-wrapper .cl-list li{
      font-size:13px;color:var(--dark);padding:5px 0;
      padding-left:18px;position:relative;
    }
    .changelog-carousel-wrapper .cl-list li::before{
      content:'•';position:absolute;left:4px;color:var(--primary);font-weight:700;
    }
    .changelog-dots{
      display:flex;justify-content:center;gap:8px;margin-top:14px;
    }
    .changelog-dots .cl-dot{
      width:8px;height:8px;border-radius:50%;
      background:#cbd5e0;cursor:pointer;transition:.3s;
    }
    .changelog-dots .cl-dot.active{
      background:var(--primary);width:24px;border-radius:4px;
    }
    /* 旧轮播样式保留兼容 */
    .changelog-carousel-container{
      position:relative;overflow:hidden;padding:10px 0;
    }
    .changelog-carousel-track{
      display:flex;transition:transform .5s ease-in-out;
    }
    .changelog-carousel-item{
      min-width:100%;padding:14px 18px;
      background:linear-gradient(135deg,#f8fafc,#eef2ff);
      border-radius:10px;border-left:4px solid var(--primary);
    }
    .changelog-carousel-item .cl-version{
      font-size:12px;font-weight:700;color:var(--primary);margin-bottom:6px;
    }
    .changelog-carousel-item .cl-date{
      font-size:11px;color:#999;margin-bottom:10px;
    }
    .changelog-carousel-item .cl-list{
      list-style:none;padding:0;margin:0;
    }
    .changelog-carousel-item .cl-list li{
      font-size:13px;color:var(--dark);padding:4px 0;
      padding-left:18px;position:relative;
    }
    .changelog-carousel-item .cl-list li::before{
      content:'•';position:absolute;left:4px;color:var(--primary);font-weight:700;
    }
    .changelog-carousel-dots{
      display:flex;justify-content:center;gap:6px;margin-top:12px;
    }
    .changelog-carousel-dots .dot{
      width:8px;height:8px;border-radius:50%;
      background:#cbd5e0;cursor:pointer;transition:.2s;
    }
    .changelog-carousel-dots .dot.active{
      background:var(--primary);width:20px;border-radius:4px;
    }

    /* Countdown (hidden by default) */
    .countdown-row{display:none;grid-template-columns:repeat(3,1fr);gap:14px}
    .cd-card{
      padding:20px;border-radius:var(--radius);color:#fff;text-align:center;
      box-shadow:0 4px 15px rgba(0,0,0,.15);
    }
    .cd-card:nth-child(1){background:linear-gradient(135deg,var(--primary),var(--primary-dark))}
    .cd-card:nth-child(2){background:linear-gradient(135deg,#00d9a3,#00b894)}
    .cd-card:nth-child(3){background:linear-gradient(135deg,#ff6b6b,#e17055)}
    .cd-card .cd-val{font-size:34px;font-weight:800}
    .cd-card .cd-label{font-size:12px;opacity:.9;margin-top:4px}

    /* Notification list */
    .notif-list{display:flex;flex-direction:column;gap:10px}
    .notif-item{
      display:flex;align-items:flex-start;gap:12px;padding:14px 16px;
      background:var(--light);border-radius:10px;cursor:pointer;
      transition:.2s;border-left:4px solid transparent;
    }
    .notif-item:hover{transform:translateX(3px);background:#edf2f7}
    .notif-item.urgent{border-left-color:var(--danger);animation:urgentPulse 2s infinite}
    @keyframes urgentPulse{
      0%,100%{box-shadow:0 0 0 0 rgba(255,107,107,.3)}
      50%{box-shadow:0 0 0 6px rgba(255,107,107,0)}
    }
    .notif-type-tag{
      font-size:10px;padding:2px 8px;border-radius:20px;font-weight:700;text-transform:uppercase;
    }
    .tag-notification{background:rgba(102,126,234,.15);color:var(--primary)}
    .tag-call{background:rgba(255,107,107,.15);color:var(--danger)}
    .tag-announcement{background:rgba(255,193,7,.15);color:#b8860b}
    .notif-content{flex:1;min-width:0}
    .notif-title{font-weight:600;font-size:14px;margin-bottom:3px}
    .notif-preview{font-size:12px;color:var(--gray);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .notif-meta{font-size:11px;color:#aaa;margin-top:4px;display:flex;gap:12px;flex-wrap:wrap}
    .notif-actions{display:flex;gap:6px;flex-shrink:0}
    .notif-status{
      font-size:10px;padding:2px 8px;border-radius:20px;font-weight:600;margin-left:6px;
    }
    .notif-status.status-pending{background:#fef3c7;color:#92400e}
    .notif-status.status-confirmed{background:#d1fae5;color:#065f46}
    .notif-status.status-partial{background:#dbeafe;color:#1e40af}
    .notif-status.status-unread{background:#fee2e2;color:#991b1b}

    /* Batch selection */
    .batch-toolbar{
      display:none;align-items:center;justify-content:space-between;
      padding:10px 14px;background:var(--primary);color:#fff;
      border-radius:8px;margin-bottom:12px;font-size:13px;
    }
    .batch-toolbar.show{display:flex}
    .batch-toolbar .batch-count{font-weight:600}
    .batch-toolbar .batch-actions{display:flex;gap:8px}
    .btn-batch{
      padding:5px 12px;border:1px solid rgba(255,255,255,.5);
      background:rgba(255,255,255,.15);color:#fff;
      border-radius:6px;cursor:pointer;font-size:12px;transition:.2s;
    }
    .btn-batch:hover{background:rgba(255,255,255,.3)}
    .btn-batch.danger{background:rgba(255,107,107,.5);border-color:rgba(255,107,107,.5)}
    .btn-batch.danger:hover{background:rgba(255,107,107,.8)}
    .notif-checkbox{
      width:20px;height:20px;border:2px solid #cbd5e0;
      border-radius:4px;cursor:pointer;flex-shrink:0;
      display:flex;align-items:center;justify-content:center;
      font-size:12px;color:transparent;transition:.2s;
    }
    .notif-checkbox.checked{
      background:var(--primary);border-color:var(--primary);color:#fff;
    }
    .notif-item.selected{background:#eef0ff;border-left-color:var(--primary)}

    /* Birthday grid */
    .birthday-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px}
    .bday-card{
      background:linear-gradient(135deg,#fd79a8,#e84393);color:#fff;
      padding:16px;border-radius:var(--radius);text-align:center;
      box-shadow:0 4px 12px rgba(253,121,168,.3);
    }
    .bday-card .bday-emoji{font-size:32px;margin-bottom:6px}
    .bday-card .bday-name{font-size:15px;font-weight:700}
    .bday-card .bday-date{font-size:12px;opacity:.85;margin-top:4px}

    /* Buttons */
    .btn{
      padding:9px 18px;border:none;border-radius:8px;
      font-size:13px;font-weight:600;cursor:pointer;transition:.2s;
      display:inline-flex;align-items:center;gap:5px;
    }
    .btn-sm{padding:5px 10px;font-size:11px}
    .btn-primary{
      background:linear-gradient(135deg,var(--primary),#764ba2);
      color:#fff;box-shadow:0 4px 12px rgba(102,126,234,.3);
    }
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(102,126,234,.4)}
    .btn-success{background:linear-gradient(135deg,var(--success),#00b894);color:#fff}
    .btn-danger{background:linear-gradient(135deg,var(--danger),#e17055);color:#fff}
    .btn-secondary{background:#e2e8f0;color:var(--dark)}
    .btn-secondary:hover{background:#cbd5e0}
    .btn-info{background:var(--info);color:#fff}

    /* Modal */
    .modal-overlay{
      position:fixed;top:0;left:0;width:100%;height:100%;
      background:rgba(0,0,0,.5);backdrop-filter:blur(4px);
      display:none;align-items:center;justify-content:center;z-index:1000;
    }
    .modal-overlay.show{display:flex}
    .modal{
      background:#fff;border-radius:18px;padding:28px;width:92%;max-width:580px;
      max-height:85vh;overflow-y:auto;animation:modalIn .25s ease-out;
    }
    .modal-lg{max-width:800px}
    .modal-full{max-width:95vw;width:95vw;height:90vh;max-height:90vh}
    @keyframes modalIn{from{opacity:0;transform:translateY(-16px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
    .modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
    .modal-title{font-size:18px;font-weight:700}
    .modal-close{background:none;border:none;font-size:22px;cursor:pointer;color:#aaa;line-height:1}
    .modal-close:hover{color:#333}

    /* Popup notification (bottom-right slide-in) */
    .notif-popup{
      position:fixed;bottom:24px;right:24px;width:380px;max-width:92vw;
      background:#fff;border-radius:var(--radius);
      box-shadow:0 8px 40px rgba(0,0,0,.18);z-index:999;
      animation:popupSlide .4s ease-out;overflow:hidden;
    }
    @keyframes popupSlide{from{opacity:0;transform:translateX(100%)}to{opacity:1;transform:translateX(0)}}
    .popup-header{
      display:flex;align-items:center;justify-content:space-between;
      padding:14px 16px;border-bottom:1px solid #eee;
    }
    .popup-type{font-size:11px;font-weight:700;display:flex;align-items:center;gap:5px}
    .popup-type.notification{color:var(--primary)}
    .popup-type.call{color:var(--danger)}
    .popup-type.announcement{color:#b8860b}
    .popup-close{cursor:pointer;color:#aaa;font-size:16px}
    .popup-body{padding:16px}
    .popup-body h4{font-size:15px;margin-bottom:6px}
    .popup-body p{font-size:13px;color:#666;line-height:1.6}
    .popup-footer{padding:10px 16px;border-top:1px solid #eee;display:flex;gap:8px;justify-content:flex-end}
    .popup-audio{margin-top:10px}
    .popup-audio audio{width:100%;margin-top:6px;height:32px}

    /* Forms */
    .form-group{margin-bottom:14px}
    .form-group label{display:block;margin-bottom:5px;font-size:13px;font-weight:500;color:var(--gray)}
    .form-group input,.form-group textarea,.form-group select{
      width:100%;padding:10px 12px;border:2px solid #e2e8f0;
      border-radius:8px;font-size:13px;transition:.2s;font-family:inherit;
    }
    .form-group input:focus,.form-group textarea:focus,.form-group select:focus{
      outline:none;border-color:var(--primary);
      box-shadow:0 0 0 3px rgba(102,126,234,.1);
    }
    .form-group textarea{resize:vertical;min-height:80px}
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}

    /* Schedule grid */
    .schedule-grid{
      display:grid;grid-template-columns:70px repeat(5,1fr);gap:6px;
    }
    .sch-header{
      background:linear-gradient(135deg,var(--primary),#764ba2);
      color:#fff;padding:10px 6px;border-radius:6px;
      text-align:center;font-weight:600;font-size:12px;
    }
    .sch-cell{
      background:#f8f9fa;padding:10px 6px;border-radius:6px;
      text-align:center;min-height:64px;display:flex;flex-direction:column;
      justify-content:center;cursor:pointer;transition:.2s;
      border:2px solid transparent;font-size:12px;
    }
    .sch-cell:hover{border-color:var(--primary);background:#eef0ff}
    .sch-cell .subj{font-weight:600;font-size:13px}
    .sch-cell .teach{color:#888;font-size:11px;margin-top:2px}
    .sch-time{
      background:var(--dark);color:#fff;padding:10px 6px;
      border-radius:6px;text-align:center;font-weight:600;font-size:12px;
      display:flex;align-items:center;justify-content:center;
    }

    /* Table */
    .data-table{width:100%;border-collapse:collapse}
    .data-table th,.data-table td{padding:10px 12px;text-align:left;border-bottom:1px solid #eee;font-size:13px}
    .data-table th{font-weight:600;color:var(--gray);background:#f8f9fa}
    .data-table tr:hover{background:#f8f9fa}

    /* Footer */
    .footer-bar{text-align:center;padding:20px;font-size:12px;color:#aaa}
    .footer-bar strong{color:var(--primary)}

    /* Record button */
    .rec-btn{
      display:inline-flex;align-items:center;gap:6px;padding:10px 16px;
      border-radius:24px;font-size:13px;font-weight:600;cursor:pointer;
      border:2px solid var(--primary);color:var(--primary);background:#fff;
      transition:.2s;
    }
    .rec-btn:hover{background:rgba(102,126,234,.05)}
    .rec-btn.recording{background:var(--danger);border-color:var(--danger);color:#fff;animation:pulseRec 1.2s infinite}
    @keyframes pulseRec{0%,100%{box-shadow:0 0 0 0 rgba(255,107,107,.4)}50%{box-shadow:0 0 0 10px rgba(255,107,107,0)}}
    .rec-timer{font-size:12px;color:var(--danger);margin-left:8px;font-family:monospace}

    /* Toast */
    .toast{
      position:fixed;top:72px;right:20px;background:var(--dark);color:#fff;
      padding:12px 20px;border-radius:10px;z-index:9999;font-size:13px;
      animation:toastIn .3s;box-shadow:0 8px 30px rgba(0,0,0,.2);
    }
    @keyframes toastIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}

    /* Responsive */
    @media(max-width:1024px){
      .grid{grid-template-columns:1fr}
      .sidebar{position:static;display:flex;overflow-x:auto;gap:6px}
      .nav-item{flex-shrink:0;white-space:nowrap}
      .stats-row{grid-template-columns:repeat(2,1fr)}
      .countdown-row{grid-template-columns:1fr}
      .schedule-grid{grid-template-columns:50px repeat(5,1fr);font-size:10px}
    }
    @media(max-width:640px){
      .stats-row{grid-template-columns:1fr}
      .container{padding:10px}
      .header-brand h1{font-size:13px}
    }

    .birthday-alert{
      background:linear-gradient(135deg,#fd79a8,#e84393);color:#fff;
      padding:16px 20px;border-radius:var(--radius);display:flex;
      align-items:center;gap:14px;cursor:pointer;box-shadow:0 4px 15px rgba(253,121,168,.3);
      margin-bottom:20px;display:none;
    }
    .birthday-alert.show{display:flex;animation:bdayBounce .6s ease-out}
    @keyframes bdayBounce{0%{transform:scale(.3);opacity:0}60%{transform:scale(1.03)}100%{transform:scale(1);opacity:1}}
    .birthday-alert .bday-icon{font-size:36px}
    .birthday-alert h3{font-size:17px;margin-bottom:2px}

    /* Carousel Indicator */
    .carousel-indicator{
      position:fixed;top:80px;left:50%;transform:translateX(-50%);
      background:linear-gradient(135deg,#2563eb,#1e40af);color:#fff;
      padding:12px 24px;border-radius:12px;z-index:999;
      box-shadow:0 4px 20px rgba(37,99,235,.4);
      animation:carouselSlide .4s ease-out;
      display:flex;align-items:center;gap:12px;max-width:90vw;
    }
    @keyframes carouselSlide{from{opacity:0;transform:translateX(-50%) translateY(-20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
    .carousel-indicator .carousel-type{font-size:11px;font-weight:700;background:rgba(255,255,255,.2);padding:3px 10px;border-radius:20px}
    .carousel-indicator .carousel-sender{font-size:12px;opacity:.9}
    .carousel-indicator .carousel-title{font-size:13px;font-weight:600}

    /* Sent animation overlay */
    .sent-overlay{
      position:fixed;top:0;left:0;width:100%;height:100%;
      background:rgba(0,0,0,.3);display:none;align-items:center;justify-content:center;z-index:3000;
    }
    .sent-overlay.show{display:flex}
    .sent-box{
      background:#fff;border-radius:20px;padding:36px 48px;text-align:center;
      box-shadow:0 20px 60px rgba(0,0,0,.2);
      animation:sentBounce .5s cubic-bezier(.21,1.02,.73,1);
    }
    @keyframes sentBounce{
      from{opacity:0;transform:scale(.4) translateY(-30px)}
      60%{transform:scale(1.05) translateY(0)}
      to{opacity:1;transform:scale(1) translateY(0)}
    }
    .sent-checkmark{
      width:68px;height:68px;border-radius:50%;
      background:linear-gradient(135deg,var(--success),#00b894);margin:0 auto 16px;
      display:flex;align-items:center;justify-content:center;
      animation:sentPop .4s .2s both;
    }
    @keyframes sentPop{
      from{transform:scale(0)}to{transform:scale(1)}
    }
    .sent-checkmark::after{
      content:'';width:14px;height:26px;
      border:solid #fff;border-width:0 5px 5px 0;
      transform:rotate(45deg) translateY(-2px);
    }
    .sent-title{font-size:20px;font-weight:800;color:var(--dark);margin-bottom:6px}
    .sent-sub{font-size:13px;color:var(--gray)}
    .sent-sub.delay{color:#e65100;font-weight:600}/* ============================
   移动端响应式适配
   ============================ */
@media (max-width: 768px) {
  .header { padding: 10px 16px; flex-wrap: wrap; gap: 8px; }
  .header h1 { font-size: 16px; }
  .header-brand { gap: 6px; }
  .logo-icon { font-size: 22px; }

  .grid { grid-template-columns: 1fr; }

  .sidebar {
    flex-direction: row;
    overflow-x: auto;
    padding: 8px 10px;
    gap: 4px;
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
  }
  .sidebar .nav-item {
    white-space: nowrap;
    padding: 8px 14px;
    font-size: 12px;
    border-radius: 8px;
  }
  .sidebar .nav-item .icon { margin-right: 4px; font-size: 14px; }

  .container { padding: 10px; }

  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .stat-card { padding: 14px; }
  .stat-val { font-size: 22px; }
  .stat-icon-box { width: 36px; height: 36px; }

  .countdown-row { grid-template-columns: 1fr; gap: 10px; }

  .schedule-table { font-size: 11px; }
  .schedule-table th, .schedule-table td { padding: 6px 4px; }

  .modal { width: 95vw; max-height: 85vh; border-radius: 14px; }
  .modal-full { width: 95vw; height: 85vh; }

  .notif-list { gap: 8px; }
  .notif-item { padding: 12px; }
  .batch-toolbar { flex-wrap: wrap; gap: 6px; }

  .weather-bar { flex-direction: column; align-items: flex-start; gap: 8px; }

  .birthday-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-bar { font-size: 10px; padding: 12px; }

  .form-row { grid-template-columns: 1fr; }

  /* ClassIsland widget smaller on mobile */
  .classisland-widget { width: 260px; padding: 14px; }
}

@media (max-width: 480px) {
  .header { padding: 8px 12px; }
  .header h1 { font-size: 14px; }
  .header-user { gap: 6px; }
  .btn-logout { padding: 4px 10px; font-size: 11px; }
  .user-name { font-size: 11px; }

  .sidebar .nav-item { padding: 6px 10px; font-size: 11px; }
  .sidebar .nav-item .icon { font-size: 12px; margin-right: 2px; }

  .stats-row { grid-template-columns: 1fr 1fr; gap: 8px; }
  .stat-card { padding: 10px 12px; }
  .stat-val { font-size: 18px; }
  .stat-label { font-size: 10px; }

  .card { padding: 14px; }
  .card-header { flex-direction: column; gap: 8px; align-items: flex-start; }
  .card-title { font-size: 15px; }

  .btn { padding: 8px 14px; font-size: 12px; }

  .birthday-grid { grid-template-columns: 1fr; }
}

/* ============================
   平板适配
   ============================ */
@media (min-width: 769px) and (max-width: 1024px) {
  .grid { grid-template-columns: 180px 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .countdown-row { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 14px; }
}