    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f0f2f5;
            padding: 30px 20px;
            color: #1e2a3a;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 16px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            overflow: hidden;
            padding: 25px 30px 35px;
        }
        h1 {
            font-size: 28px;
            margin-bottom: 10px;
            color: #2c3e50;
            border-left: 5px solid #3498db;
            padding-left: 18px;
        }
        .sub {
            color: #5d6e7e;
            margin-bottom: 30px;
            font-size: 16px;
            border-bottom: 1px solid #e9ecef;
            padding-bottom: 12px;
        }
        /* 题目卡片 */
        .message-card {
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            margin: 20px 0 30px;
            border: 1px solid #eef2f6;
            overflow: hidden;
        }
        .msg-header {
            background: #f8fafc;
            padding: 14px 22px;
            border-bottom: 1px solid #e2e8f0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            font-size: 16px;
        }
        .author {
            font-weight: 700;
            color: #1e466e;
            font-size: 16px;
        }
        .date {
            color: #7f8c8d;
            font-size: 16px;
        }
        .msg-content {
            padding: 22px 25px;
            line-height: 1.65;
            font-size: 16px;
            background: #fff;
            word-break: break-word;
        }
        .nav-buttons {
            display: flex;
            gap: 18px;
            justify-content: center;
            margin: 20px 0 25px;
            flex-wrap: wrap;
        }
        .nav-btn {
            background: #eef2ff;
            border: none;
            padding: 10px 26px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 40px;
            cursor: pointer;
            transition: all 0.2s ease;
            text-decoration: none;
            display: inline-block;
            color: #2c3e50;
            border: 1px solid #cddfe7;
        }
        .nav-btn:hover:not(.disabled) {
            background: #3498db;
            color: white;
            border-color: #3498db;
            transform: translateY(-2px);
            box-shadow: 0 4px 10px rgba(52,152,219,0.2);
        }
        .disabled {
            background: #f1f3f4;
            color: #adb5bd;
            cursor: not-allowed;
            border-color: #dee2e6;
            pointer-events: none;
        }
        .action-links {
            text-align: center;
            margin-top: 20px;
            padding-top: 18px;
            border-top: 1px solid #e9ecef;
            display: flex;
            justify-content: center;
            gap: 28px;
        }
        .action-links a {
            text-decoration: none;
            color: #3498db;
            font-weight: 500;
            font-size: 16px;
        }
        .action-links a:hover {
            text-decoration: underline;
            color: #1f618d;
        }
        .info-badge {
            background: #e9f7fe;
            text-align: center;
            padding: 12px;
            border-radius: 40px;
            font-size: 16px;
            margin: 15px 0 5px;
            color: #2c6e9e;
        }
        .footer-note {
            text-align: center;
            font-size: 16px;
            color: #8e9eae;
            margin-top: 30px;
        }
        .btn-primary {
            background: #3498db;
            color: white;
            padding: 8px 20px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 500;
            transition: 0.2s;
            display: inline-block;
        }
        .btn-primary:hover {
            background: #2c7ab1;
        }
        .empty-msg {
            text-align: center;
            padding: 50px 20px;
            background: #fef5e7;
            border-radius: 28px;
            margin: 20px 0;
        }
		
		a:link {
			color: #000000;
			text-decoration: none;
			font-size: 16px;
		}
		a:visited {
			color: #000000;
			text-decoration: none;
			font-size: 16px;
		}
		a:hover {
			color: #2c7ab1;
			text-decoration: none;
			font-size: 16px;
		}
		
		/* 输入框样式 */
		.data-add {
		    padding: 8px 10px;
		    border: 2px solid #e1e5e9;
		    border-radius: 6px;
		    font-size: 16px;
		    transition: all 0.3s ease;
		    background: white;
		    width: 100%;
		    max-width: 400px;
		}
		
		.data-addtext {
		    padding: 8px 10px;
		    border: 2px solid #e1e5e9;
		    border-radius: 6px;
		    font-size: 16px;
		    transition: all 0.3s ease;
		    background: white;
		    width: 100%;
		    max-width: 800px;
		}
		
		.data-input {
		    padding: 8px 10px;
		    border: 2px solid #e1e5e9;
		    border-radius: 6px;
		    font-size: 16px;
		    transition: all 0.3s ease;
		    background: white;
		    width: 100%;
		    max-width: 140px;
		}
		
		.data-input.readonly {
		    background-color: #f8f9fa;
		    color: #666;
		    cursor: not-allowed;
		}
		
		.data-input:focus {
		    border-color: #6a11cb;
		    box-shadow: 0 0 0 3px rgba(106, 17, 203, 0.1);
		    outline: none;
		}
		
		
		/* 数据表格 */
		.data-table {
		    width: 100%;
		    border-collapse: separate;
		    border-spacing: 0;
		    border-radius: 10px;
		    overflow: hidden;
		}
		
		.data-table thead {
		    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
		    color: white;
		}
		
		.data-table th {
		    padding: 16px 12px;
		    text-align: center;
		    font-weight: 500;
		    font-size: 16px;
		    border-bottom: 2px solid #667eea;
		}
		
		.data-table tbody tr {
		    transition: all 0.3s ease;
		}
		
		.data-table tbody tr:nth-child(even) {
		    background-color: #f8f9fa;
		}
		
		.data-table tbody tr:nth-child(odd) {
		    background-color: #ffffff;
		}
		
		.data-table tbody tr:hover {
		    background-color: #f0f4ff;
		    transform: translateY(-1px);
		    box-shadow: 0 3px 10px rgba(102, 126, 234, 0.1);
		}
		
		.data-table td {
		    padding: 14px 12px;
		    text-align: center;
		    border-bottom: 1px solid #eef2f7;
		    font-size: 16px;
		    color: #555;
		}
		
    </style>