:root {
            --primary: #3B82F6;
            --primary-dark: #2563eb;
            --primary-light: #eff6ff;
            --secondary: #10B981;
            --neutral: #64748b;
            --neutral-light: #f1f5f9;
            --neutral-dark: #334155;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --radius: 5px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
  
        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #ffffff;
            margin: 0;
            padding: 0px;
        }
        
        .container {
            max-width: 1160px;
            margin: 25px auto;
            background-color: #ffffff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
        }


        header {
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.8);
            padding: 20px 0px;
            position: sticky;
            top: 0;
            z-index: 5;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0px;
            box-sizing: border-box;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            transition: transform 0.3s;
        }
        .logo:hover {
            transform: translateY(-2px);
        }
        .logo i {
            color: #3B82F6;
            font-size: 28px;
        }
        .logo h1 {
            font-size: 22px;
            font-weight: 600;
            color: #3B82F6;
            margin: 0;
            letter-spacing: 0.5px;
        }
        .logo a {
            text-decoration: none;
        }
        nav ul {
            display: flex;
            list-style: none;
            gap: 20px;
            margin: 0;
            padding: 0;
        }
        nav a {
            color: #6B7280;
            text-decoration: none;
            transition: color 0.3s;
            font-size: 15px;
        }

        nav a:hover {
            color: #3B82F6;
        }       

        
        h1 {
            color: var(--primary);
            text-align: center;
            margin-bottom: 10px;
            font-size: 1.6rem;
        }
        
        h2 {
            color: var(--neutral-dark);
            font-size: 1.1rem;
            margin-top: 25px;
            margin-bottom: 15px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--neutral-light);
        }
        
        .description {
            color: var(--neutral);
            text-align: center;
            margin-bottom: 25px;
            font-size: 1.0rem;
        }
        
        .input-group {
            margin-bottom: 20px;
        }
        
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            color: var(--neutral-dark);
        }
        
        input[type="number"] {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: var(--radius);
            font-size: 1rem;
            box-sizing: border-box;
        }
        
        .btn {
            background-color: var(--primary);
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: var(--radius);
            cursor: pointer;
            font-size: 1rem;
            transition: background-color 0.3s;
            width: 100%;
            margin-top: 10px;
        }
        
        .btn:hover {
            background-color: var(--primary-dark);
        }
        
        .result-container {
            margin-top: 30px;
            padding: 20px;
            background-color: var(--primary-light);
            border-radius: var(--radius);
            display: none;
        }
        
        .result-title {
            font-weight: bold;
            margin-bottom: 15px;
            color: var(--primary-dark);
            font-size: 1.1rem;
        }
        
        .result-item {
            margin-bottom: 10px;
            display: flex;
            justify-content: space-between;
        }
        
        .result-label {
            font-weight: bold;
        }
        
        .rules {
            margin-top: 30px;
            padding: 15px;
            background-color: var(--neutral-light);
            border-radius: var(--radius);
            font-size: 0.9rem;
        }
        
        .rules-title {
            font-weight: bold;
            margin-bottom: 10px;
            color: var(--neutral-dark);
        }
        
        .rules-list {
            margin: 0;
            padding-left: 20px;
        }
        
        .rules-list li {
            margin-bottom: 8px;
        }
        
        .priority-rules {
            margin-top: 15px;
        }


        footer {
            padding: 23px 0;
            margin-top: 25px;
            color: #333;
            background-color: rgba(255, 255, 255, 0.8);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.0);
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
            padding: 0 20px;
            box-sizing: border-box;
            font-size: 13px;
        }
        .footer-container p {
            margin: 4px 0;
        }
        .footer-container .contact {
            font-size: 13px;
            color: #6B7280;
        }

        
        @media (min-width: 768px) {
            .container {
                padding: 15px;
            }
            
            h1 {
                font-size: 1.6rem;
            }
        }