* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .activate-container {
            background: white;
            border-radius: 10px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.1);
            padding: 40px;
            width: 100%;
            max-width: 500px;
        }
        .activate-header {
            text-align: center;
            margin-bottom: 30px;
        }
        .activate-header h1 {
            color: #667eea;
            font-size: 28px;
            margin-bottom: 10px;
        }
        .activate-header p {
            color: #888;
            font-size: 14px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 500;
        }
        .form-group input {
            width: 100%;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 14px;
            transition: border-color 0.3s;
        }
        .form-group input:focus {
            outline: none;
            border-color: #667eea;
        }
        .btn-activate {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 5px;
            font-size: 16px;
            cursor: pointer;
            transition: transform 0.2s;
        }
        .btn-activate:hover {
            transform: translateY(-2px);
        }
        .btn-activate:disabled {
            opacity: 0.6;
            cursor: not-allowed;
        }
        .error-message {
            background: #fee;
            color: #c33;
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 20px;
            display: none;
        }
        .success-message {
            background: #efe;
            color: #3c3;
            padding: 10px;
            border-radius: 5px;
            margin-bottom: 20px;
            display: none;
        }
        .step {
            display: none;
        }
        .step.active {
            display: block;
        }
        .success-icon {
            text-align: center;
            font-size: 48px;
            margin-bottom: 20px;
        }
        .legal-row {
            margin: 16px 0 20px;
            font-size: 13px;
            color: #555;
            line-height: 1.6;
        }
        .legal-row label {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            cursor: pointer;
            font-weight: normal;
        }
        .legal-row input { width: auto; margin-top: 3px; flex-shrink: 0; }
        .legal-row a { color: #667eea; text-decoration: none; }
        .legal-row a:hover { text-decoration: underline; }