* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        body {
            background-color: #f5f5f5;
            color: #333;
            line-height: 1.6;
            padding: 20px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            background: white;
            border-radius: 10px;
            padding: 20px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        .progress-bar {
            display: flex;
            justify-content: space-between;
            margin-bottom: 30px;
            position: relative;
        }
        .progress-bar:before {
            content: '';
            position: absolute;
            top: 15px;
            left: 0;
            right: 0;
            height: 4px;
            background: #e0e0e0;
            z-index: 1;
        }
        .progress-step {
            text-align: center;
            z-index: 2;
        }
        .step-number {
            width: 30px;
            height: 30px;
            background-color: #1a86ff;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 5px;
            font-weight: bold;
        }
        .step-number.active {
            background-color: #1a86ff;
        }
        .step-number.inactive {
            background-color: #e0e0e0;
        }
        .step-title {
            font-size: 14px;
            color: #666;
        }
        h1 {
            text-align: center;
            margin-bottom: 20px;
            color: #333;
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
        }
        input[type="text"],
        input[type="tel"] {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
        }
        .tip {
            background-color: #f8f9fa;
            padding: 15px;
            border-left: 4px solid #1a86ff;
            margin-bottom: 20px;
            font-size: 14px;
            color: #666;
        }
        .btn {
            display: inline-block;
            padding: 12px 20px;
            background-color: #1a86ff;
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            cursor: pointer;
            text-align: center;
            margin-top: 20px;
            text-decoration: none;
        }
        .btn-return {
            background-color: #666;
            margin-right: 10px;
        }
        .btn:hover {
            background-color:#1a86ff;
        }
        .btn:disabled {
            background-color: #cccccc;
            cursor: not-allowed;
        }
        .agreement {
            margin: 20px 0;
        }
        .agreement input {
            margin-right: 10px;
            vertical-align: middle;
        }
        .agreement a {
            color: #1a86ff;
            text-decoration: none;
            margin: 0 5px;
        }
        .agreement a:hover {
            text-decoration: underline;
        }
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 100;
            overflow-y: auto;
        }
        .modal-content {
            background-color: white;
            margin: 50px auto;
            padding: 20px;
            border-radius: 5px;
            max-width: 800px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        .modal-header h2 {
            margin: 0;
        }
        .close {
            font-size: 24px;
            cursor: pointer;
        }
        .modal-body {
            line-height: 1.8;
        }
        .button-container {
            display: flex;
            justify-content: center;
            margin-top: 20px;
        }
        @media (max-width: 600px) {
            .container {
                padding: 15px;
            }
            .progress-step {
                font-size: 12px;
            }
            body {
                font-size: 14px;
            }
        
            .btn {
                padding: 10px 15px;
                font-size: 14px;
            }
        }