* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            background-color: #f5f9ff;
            color: #333;
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
        }
        
        .container {
            max-width: 1000px;
            margin: 0 auto;
            background-color: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 87, 183, 0.15);
            overflow: hidden;
        }
        
        header {
            background: linear-gradient(135deg, #0057b7 0%, #0085e8 100%);
            color: white;
            padding: 30px 20px;
            text-align: center;
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
        }
        
        h1 i {
            font-size: 2.2rem;
        }
        
        .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 5px;
        }
        
        .description {
            max-width: 800px;
            margin: 25px auto;
            padding: 0 20px;
            font-size: 1.05rem;
            color: #444;
        }
        
        .main-content {
            padding: 30px;
        }
        
        .phone-display {
            text-align: center;
            margin-bottom: 40px;
            padding: 30px;
            background: linear-gradient(to right, #f8fbff, #eef5ff);
            border-radius: 12px;
            border: 1px solid #e0edff;
        }
        
        .selected-province {
            font-size: 1.8rem;
            color: #0057b7;
            margin-bottom: 15px;
            font-weight: 600;
        }
        
        .phone-number {
            font-size: 3.5rem;
            font-weight: 700;
            color: #0057b7;
            margin: 20px 0;
            letter-spacing: 2px;
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
        }
        
        .call-button {
            display: inline-block;
            background: linear-gradient(to right, #00a84f, #00c853);
            color: white;
            padding: 18px 50px;
            border-radius: 50px;
            font-size: 1.8rem;
            font-weight: 600;
            text-decoration: none;
            margin-top: 20px;
            box-shadow: 0 5px 15px rgba(0, 168, 79, 0.3);
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        
        .call-button:hover {
            background: linear-gradient(to right, #009944, #00b347);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(0, 168, 79, 0.4);
        }
        
        .call-button i {
            margin-right: 10px;
        }
        
        .province-selection {
            margin-top: 40px;
        }
        
        h2 {
            font-size: 1.8rem;
            color: #0057b7;
            margin-bottom: 25px;
            text-align: center;
            padding-bottom: 10px;
            border-bottom: 2px solid #eef5ff;
        }
        
        .province-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 15px;
            margin-top: 20px;
        }
        
        .province-btn {
            padding: 16px 10px;
            background-color: #f0f7ff;
            border: 2px solid #d0e4ff;
            border-radius: 10px;
            font-size: 1.1rem;
            color: #0057b7;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            text-align: center;
        }
        
        .province-btn:hover {
            background-color: #e1efff;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 87, 183, 0.1);
        }
        
        .province-btn.active {
            background-color: #0057b7;
            color: white;
            border-color: #0057b7;
            box-shadow: 0 4px 12px rgba(0, 87, 183, 0.2);
        }
        
        .notice {
            margin-top: 40px;
            padding: 25px;
            background-color: #fff9e6;
            border-radius: 10px;
            border-left: 5px solid #ffc107;
        }
        
        .notice h3 {
            color: #e6a700;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .notice ul {
            padding-left: 20px;
        }
        
        .notice li {
            margin-bottom: 10px;
        }
        
        footer {
            text-align: center;
            padding: 25px;
            margin-top: 30px;
            color: #666;
            font-size: 0.95rem;
            border-top: 1px solid #eee;
        }
        
        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            
            .phone-number {
                font-size: 2.5rem;
            }
            
            .call-button {
                padding: 15px 40px;
                font-size: 1.5rem;
            }
            
            .province-grid {
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            }
        }
        
        @media (max-width: 480px) {
            .container {
                border-radius: 10px;
            }
            
            header {
                padding: 20px 15px;
            }
            
            h1 {
                font-size: 1.7rem;
            }
            
            .phone-number {
                font-size: 2rem;
            }
            
            .province-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .province-btn {
                padding: 14px 5px;
                font-size: 1rem;
            }
        }