* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", sans-serif;
        }

        body {
            background-color: #f5f7fa;
            padding: 20px;
            max-width: 600px;
            margin: 0 auto;
        }

        .title {
            text-align: center;
            color: #2c3e50;
            margin: 30px 0;
            font-size: 26px;
        }

        .search-box {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            margin-bottom: 25px;
        }

        .select-group {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        #provinceSelect {
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 8px;
            font-size: 16px;
            outline: none;
        }

        #provinceSelect:focus {
            border-color: #3498db;
        }

        .tips {
            color: #7f8c8d;
            font-size: 14px;
        }

        .result-box {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.08);
            display: none;
        }

        .result-title {
            font-size: 20px;
            color: #e74c3c;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .oil-item {
            padding: 15px 0;
            border-bottom: 1px solid #eee;
            font-size: 18px;
            color: #34495e;
        }

        .oil-price {
            float: right;
            color: #e67e22;
            font-weight: bold;
        }

        .update-time {
            margin-top: 20px;
            color: #7f8c8d;
            font-size: 14px;
            text-align: right;
        }

        .loading {
            text-align: center;
            padding: 20px;
            color: #3498db;
            display: none;
        }

        .error {
            color: #e74c3c;
            text-align: center;
            padding: 20px;
            display: none;
        }