/* 隐藏所有滚动条的关键样式 */
        ::-webkit-scrollbar {
            width: 0 !important;
            height: 0 !important;
            display: none !important;
        }
        * {
            scrollbar-width: none !important;
            -ms-overflow-style: none !important;
        }

        :root {
            --primary: #4a6bfa;
            --primary-dark: #3a56d4;
            --secondary: #6c63ff;
            --dark: #1a1e2e;
            --darker: #151824;
            --light: #f0f2f5;
            --gray: #6e7888;
            --success: #10b981;
            --danger: #ef4444;
            --border-radius: 8px;
            --card-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --card-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.2);
            --transition: all 0.2s ease;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }

        body {
            font-family: "SF Pro Display", "SF Pro Icons", "Helvetica Neue", "Microsoft YaHei", "Segoe UI", sans-serif;
            background-color: var(--dark);
            color: white;
            line-height: 1.5;
            font-size: 0.95em;
        }

        /* 背景几何元素 */
        .background {
            position: fixed;
            top: 0; left: 0;
            width: 100%; height: 100%;
            z-index: -1;
            overflow: hidden;
        }

        .shape {
            position: absolute;
            opacity: 0.1;
            filter: blur(60px);
            transform: translateZ(0);
        }

        .shape-1 {
            background: var(--primary);
            width: 600px; height: 600px;
            top: -300px; right: -100px;
            border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
            animation: float 10s ease-in-out infinite alternate;
        }

        .shape-2 {
            background: var(--secondary);
            width: 500px; height: 500px;
            bottom: -200px; left: -100px;
            border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
            animation: float 12s ease-in-out infinite alternate-reverse;
        }

        @keyframes float {
            0% { transform: translate(0, 0) rotate(0deg); }
            100% { transform: translate(30px, 50px) rotate(10deg); }
        }

        .container {
            max-width: 80% !important;
            margin: 0 auto;
            padding: 30px 20px;
            position: relative;
        }
        
        .login-container {
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: calc(100vh - 150px);
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
            position: relative;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.8em;
            font-weight: 700;
            color: white;
            text-decoration: none;
        }

        .logo span {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .top-nav {
            display: flex;
            gap: 20px;
        }

        .nav-link {
            color: var(--gray);
            background: none;
            box-shadow: none;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1em;
            transition: var(--transition);
            padding: 8px 15px;
            border-radius: 8px;
        }

        .nav-link:hover {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
            transform: none;
            box-shadow: none;
        }

        .admin-title {
            font-size: 1.8em;
            font-weight: 800;
            text-align: center;
            background: linear-gradient(90deg, white, #a5b4fc);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            white-space: nowrap; /* 防止标题在小屏幕上换行 */
        }

        .card {
            background-color: var(--darker);
            border-radius: var(--border-radius);
            padding: 20px;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
            margin-bottom: 15px;
        }

        .card:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-2px);
        }

        .login-form {
            max-width: 400px;
            width: 100%;
            padding: 35px 30px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .card-title {
            text-align: center;
            margin-bottom: 25px;
            font-size: 1.6em;
            font-weight: 700;
            color: white;
        }

        .form-group { 
            margin-bottom: 25px; 
        }

        .form-label {
            display: block;
            margin-bottom: 6px;
            font-weight: 600;
            color: var(--light);
            font-size: 1em;
        }

        .form-input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--border-radius);
            background-color: rgba(255, 255, 255, 0.05);
            color: white;
            font-size: 1em;
            transition: all 0.3s ease;
        }

        .form-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(74, 107, 250, 0.3);
            outline: none;
        }

        .btn-container {
            display: flex;
            justify-content: space-between;
            gap: 15px;
            margin-top: 30px;
        }

        .btn {
            display: inline-block;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            padding: 14px 20px;
            border-radius: var(--border-radius);
            font-size: 1em;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
            text-decoration: none;
            flex: 1;
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn-danger {
            background: linear-gradient(90deg, var(--danger), #db2a2a);
            padding: 5px 10px;
            font-size: 0.9em;
        }

        .message {
            padding: 10px;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            background-color: rgba(239, 68, 68, 0.2);
            border-left: 3px solid var(--danger);
        }

        .message.success {
            background-color: rgba(16, 185, 129, 0.2);
            border-left: 3px solid var(--success);
        }

        .notebook-list { width: 100%; }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .notebook-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin-top: 10px;
            font-size: 0.9em;
            min-height: 400px; /* 确保表格有固定的最小高度 */
        }

        .notebook-table th, .notebook-table td {
            padding: 8px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .notebook-table th {
            background-color: rgba(255, 255, 255, 0.05);
            font-weight: 600;
            color: var(--light);
            font-size: 0.9em;
        }

        .notebook-table tr {
            transition: var(--transition);
            background-color: var(--darker);
        }

        .notebook-table tr:hover {
            background-color: rgba(255, 255, 255, 0.05);
        }

        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 15px;
            gap: 5px;
        }

        .pagination a, .pagination span {
            display: inline-block;
            padding: 5px 10px;
            border-radius: var(--border-radius);
            background-color: rgba(255, 255, 255, 0.05);
            color: var(--light);
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.9em;
        }

        .pagination a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }

        .pagination .current {
            background-color: var(--primary);
            color: white;
        }
        
        .pagination .disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        @media (max-width: 768px) {
            .container {
                max-width: 100% !important;
                padding: 10px;
            }
            
            .login-container {
                min-height: calc(100vh - 120px);
            }
            
            .admin-title {
                font-size: 1.5em;
                padding: 8px 20px !important;
            }

            .card {
                padding: 15px;
            }
            
            .login-form {
                width: 90%;
                max-width: 350px;
                padding: 25px 20px;
            }
            
            .card-title {
                font-size: 1.5em;
                margin-bottom: 20px;
            }
            
            .form-group {
                margin-bottom: 20px;
            }
            
            .btn-container {
                margin-top: 25px;
            }
            
            .btn {
                padding: 12px 16px;
            }
            
            .notebook-table {
                font-size: 0.85em;
                min-width: 640px; /* 窄屏下允许横向滚动，避免列被严重挤压 */
            }
            
            .notebook-table th, .notebook-table td {
                padding: 6px;
            }
        }

        /* 添加开关按钮样式 */
        .switch {
            position: relative;
            display: inline-block;
            width: 60px;
            height: 34px;
        }

        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 26px;
            width: 26px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
        }

        input:checked + .slider {
            background-color: var(--primary);
        }

        input:focus + .slider {
            box-shadow: 0 0 1px var(--primary);
        }

        input:checked + .slider:before {
            transform: translateX(26px);
        }

        .slider.round {
            border-radius: 34px;
        }

        .slider.round:before {
            border-radius: 50%;
        }